JVC HR-S3902US User manual

COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD
SERVICE MANUAL
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without
notice.
GENERAL
Power requirement AC 120 Vd, 60 Hz
Power consumption
Power on : 16 W
Power off 1.5 W
Temperature
Operating : 5 °C to 40 °C (41 °F to 104 °F)
Storage : –20 °C to 60 °C (–4 °F to140 °F)
Operating position :
Dimensions (WxHxD) 435 mmx94 mmx242 mm
(17-3/16" x 3-3/4" x 9-3/4")
Weight :
Format :
Maximum recording time
SP : 210 min. with ST-210 video cassette
EP : 630 min. with ST-210 video cassette
VIDEO/AUDIO
Signal system : monochrome signal, 525 lines/
60 fields
Recording/Playback
system :scan system
Signal-to-noise ratio 45 dB
Horizontal resolution
VHS 230 lines
S-VHS 400 lines
Frequency range
Normal audio 70 Hz to 10,000 Hz
Hi-Fi audio 20 Hz to 20,000 Hz
Input/Output : S-video connectors (INx2, OUTx1)
TUNER
Tuning system :
Channel coverage
VHF Channels 2–13
UHF :
CATV :
RF output Channel 3 when shipped) 75ohms,
unbalanced
TIMER
Clock reference :
Program capacity : 1-year programmable timer/
8 programs
Memory backup for timer is not supported.
ACCESSORIES
Provided accessories : “AA” battery x 2,
S-video cable (4-pin),
RF cable (F-type)
:
:
Horizontal only
:
2.7 kg (5.9 lbs)
S-VHS/VHS NTSC standard
NTSC-type color signal and EIA
DA-4 (Double Azimuth) head helical
:
:
:
:
:RCA connectors (INx2, OUTx1)
Frequency-synthesized tuner
:Channels 14–69
113 Channels
Channel 3 or 4 (switchable; preset to:
Quartz
Infrared remote control unit,
No.82950
2003/03
HR-S3902U S , HR-S3912U S , HR-S3912U C ,
HR-S5902U
S , HR-S5912U S , HR-S5912U C
HR-S3902US, HR-S3912US, HR-S3912UC, HR-S5902US, HR-S5912US, HR-S5912UC V16S1,S15
VIDEO CASSETTE RECORDER
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-S5902US.)
Regarding SCHEMATIC DIAGRAMS, refer to the service manual No. 82946 (HR-S2902US).
REW FF
REC LINK
24HR QUICK
PROGRAM
S-VIDEO
POWER INSERT A.DUB

TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 Manually removing the cassette tape ........................................ 1-1
1.2 Removing the major parts .......................................................... 1-2
1.2.1 How to read the procedure table.......................................... 1-2
1.2.2 Disassembly procedure ....................................................... 1-2
1.3 Emergency display function ....................................................... 1-4
1.3.1 Displaying the EMG information .......................................... 1-4
1.3.2 Clearing the EMG history ..................................................... 1-4
1.3.3
Details of the OSD display in the EMG display mode .................. 1-5
1.3.4 EMG content description...................................................... 1-6
1.3.5 EMG detail information<1> .................................................. 1-7
1.3.6 EMG detail information<2> .................................................. 1-8
1.3.7 EMG detail information<3> .................................................. 1-8
1.4 Service position.......................................................................... 1-9
1.4.1 How to set the "Service position" ......................................... 1-9
1.5 Jig RCU mode............................................................................ 1-9
1.5.1 Setting the Jig RCU mode ................................................... 1-9
1.5.2 Setting the User RCU mode ................................................ 1-9
1.6 Mechanism service mode .......................................................... 1-9
1.6.1 How to set the "Mechanism service mode".......................... 1-9
1.6.2 How to exit from the "Mechanism service mode"................. 1-9
1.7 Maintenance and inspection .................................................... 1-10
1.7.1 Cleaning ............................................................................. 1-10
1.7.2 Lubrication ......................................................................... 1-10
1.7.3
Suggested servicing schedule for main components ................. 1-10
2. MECHANISM
Refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY)
3. ADJUSTMENT
3.1 Before adjustment ...................................................................... 3-1
3.1.1 Precaution ............................................................................. 3-1
3.1.2 Required test equipments .................................................... 3-1
3.1.3 Required adjustment tools ................................................... 3-1
3.1.4 Color(colour) bar signal, color(colour) bar pattern ............... 3-1
3.1.5 Switch settings ..................................................................... 3-1
3.1.6
Manual tracking mode (Auto tracking ON/OFF) setting................. 3-1
3.1.7
EVR sdjustment ............................................................................. 3-2
3.2 Mechanism compatibility adjustment ......................................... 3-2
3.2.1 Tension pole position............................................................ 3-3
3.2.2 FM waveform linearity .......................................................... 3-3
3.2.3 Height and tilt of the A/C head ............................................. 3-3
3.2.4 A/C head phase(X-value)..................................................... 3-4
3.3 Electrical Adjustment.................................................................. 3-4
3.3.1 Servo circuit ......................................................................... 3-4
3.3.1.1 Switching point ................................................................ 3-4
3.3.1.2 Slow tracking preset........................................................ 3-5
3.3.2 Video circuit.......................................................................... 3-5
3.3.2.1 EE Y/PB Y(S-VHS/VHS)level.......................................... 3-5
4. CHARTS AND DIAGRAMS
Refer to the SERVICE MANUAL No.82946(HR-S2902US)
5. PARTS LIST
5.1 EXPLODED VIEW ...................................................................... 5-1
5.1.1 PACKING AND ACCESSORY ASSEMBLY<M1> ................ 5-1
5.1.2 FINAL ASSEMBLY<M2> ...................................................... 5-2
5.1.3 MECHANISM ASSEMBLY<M4> .......................................... 5-3
5.2 PARTS LIST................................................................................ 5-4
PACKING AND ACCESSORY ASSEMBLY<M1> ........................... 5-4
FINALASSEMBLY<M2> ................................................................. 5-4
MECHANISM ASSEMBLY<M4> ..................................................... 5-4
MAIN BOARD ASSEMBLY<03> .................................................... 5-5
A/C HEAD BOARD ASSEMBLY<12> .......................................... 5-12
ADV.JOG/SW BOARD ASSEMBLY<38> ...................................... 5-12
LOADING MOTOR BOARDASSEMBLY<55>............................. 5-12
R.PAUSE BOARD ASSEMBLY<99>............................................. 5-12
MODEL HR-S3902US
ITEM
BODY COLOR MOLD-BLACK PAINT-PURE SILVER PAINT-PURE SILVER PAINT-BLACK PAINT-PURE SILVER PAINT-PURE SILVER
RCU ILLUMI FUNCTION NOT USED NOT USED NOT USED USED(GLOW) USED(GLOW) USED(GLOW)
FLYING ERASE HEAD NOT USED NOT USED NOT USED USED USED USED
ZERO FRAME EDIT NOT USED NOT USED NOT USED USED USED USED
INSERT NOT USED NOT USED NOT USED USED USED USED
AUDIO DUBBING NOT USED NOT USED NOT USED USED USED USED
HR-S3912UCHR-S3912US HR-S5912USHR-S5902US HR-S5912UC
The following table indicates main different points between models HR-S3902US, HR-S3912US, HR-S3912UC, HR-S5902US, HR-
S5912US and HR-S5912UC.

Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes
of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the
following precautions when a set is being serviced.
Fig.1
1. Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and com-
ply with these and other cautionary notices appearing in the
operation and service manuals.
2. Parts identified by the symbol and shaded ( ) parts are
critical for safety.
Replace only with specified part numbers.
Note: Partsin this categoryalsoinclude those specifiedto com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape 3) Spacers 5) Barrier
2) PVC tubing 4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Power cord
Fig.2
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliancewith recognized codespertaining to X-rayemission.
Consequently, whenservicing theseproducts,replace thecath-
ode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorizedmodification canincrease thehigh voltage value
and cause X-ray emission from the cathode ray tube.
12. Crimp type wire connector
Insuch cases as whenreplacing the powertransformer in sets
where the connections between the power cord and power
transformerprimarylead wiresare performedusingcrimptype
connectors, if replacing the connectors is unavoidable, in or-
der to prevent safety hazards, perform carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Removethe old connectorby cuttingthe wires ata point
close to the connector.
Important : Do not reuse a connector (discard it).
Fig.7
cut close to connector
Fig.3
(2) Strip about 15 mm of the insulation from the ends of
the wires. If the wires are stranded, twist the strands to
avoid frayed conductors.
15 mm
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Connector
Metal sleeve
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the
metalsleeve atthe center position.Be sureto crimp fully
to the complete closure of the tool.
1
vPrecautions during Servicing
7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or
pointed parts.
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
1.25
2.0
5.5
Crimping tool
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free Crimped at approx. center
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm
S40888-01

v Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli-
ance with safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirmspecified dielectric strength or greaterbetween power cord plug prongsand exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d’) be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs
and externally exposed accessible parts (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessi-
ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and
following table 2.
5. Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
d'
d
Chassis Power cord,
primary wire
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z 0.1 ohm
Z 0.5 ohm
≤
≤
AC inlet
Earth pin
Exposed accessible part
Milli ohm meter
Grounding Specifications
Fig. 10
ab
c
V
Externally
exposed
accessible part
Z
Fig. 9
Fig. 8
Clearance Distance (d), (d')
d, d' 3 mm
d, d' 4 mm
d, d' 3.2 mm
1 MΩR 12 MΩ/500 V DC
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Japan
USA & Canada
Europe & Australia R 10 MΩ/500 V DC
Region
Insulation Resistance (R)
R 1 MΩ/500 V DC
≤
≤
≥≥
≤
≤
≤≤
≤
≤
AC 3 kV 1 minute
(Class 2)
AC 1.5 kV 1 minute
(Class 1)
d 4 mm
d' 8 mm (Power cord)
d' 6 mm (Primary wire)
Table 1 Specifications for each region
a, b, cLeakage Current (i)AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Japan
USA & Canada
i 1 mA rms Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
Europe & Australia
Region Load Z
≤
≤
≤
≤
≤
≤
1 kΩ
2 kΩ
1.5 kΩ
0.15 µF
50 kΩ
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
2S40888-01

1-1
SECTION 1
DISASSEMBLY
1.1 Manually removing the cassette tape
If you cannot remove the cassette tape which is loaded be-
cause of any electrical or mechanical failures, manually remove
it by taking the following steps.
(1) Unplug the power cord plug from the power outlet.
(2) Refer to the disassembly procedure of the VCR and perform
the disassembly of the major parts before removing the
mechanism assembly. (See Fig. 1-1a.)
Fig. 1-1b
Fig. 1-1c
(3) Unload the pole base assembly by manually turning the gear
of the loading motor until the pole base assembly is hidden
behind the cassette lid. In doing so, hold the tape by the hand
to keep the slack away from any grease. (See Fig. 1-1b.)
In case of mechanical failures, while keeping the tension arm
assembly free from tension, pull out the tape on the pole
base assembly. Take the spring(a) of the pinch roller arm
assembly off the hook, and detach it from the tape.
(4) Remove the screw (a) of the side frame (L/R).
(5) Hold the slack tape and cassette cover together, lift the cas-
sette tape, top frame, cassette holder and side frames (L,
R) together from the rear and remove them by dis-engaging
the hooks (a) and (b).
Fig. 1-1a
Pole base assembly
Tension arm assembly Pinch roller arm assembly
Direction of unloading
Spring(a)
Screw(a)
Screw(a)
Top frame
Cassette tape Cassette holder
Side frame(R)
Side frame(L)
Hook(a)
Hook(b)
(6) Take up the slack of the tape into the cassette. This com-
pletes removal of the cassette tape.

1-2
1.2.2 Disassembly procedure
1.2 Removing the major parts
1.2.1 How to read the procedure table
This table shows the steps for disassembly of the externally
furnished parts and board assemblies. Reverse these steps
when re-assembling them.
Note:
•
The bracketed ( ) WR of the connector symbol are as-
signed nos. in priority order and do not correspond to
those on the spare parts list.
(5) Adjustment information for installation
(1) (2) (3) (4) (5)
Step/
LocNo.
Part Name Fig.
No. Point Note
[1] Top cover, 1-3a 4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),
Bracket 2(S1c)
<Example>
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (location) No. of
parts Figures.
(2) Part name to be removed or installed.
(3) Fig. No. showing procedure or part location.
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder,
CN**(WR**)= Remove the wire (WR**) from the connector (CN**).
<Note 2a>
• Be careful not to damage the connector and wire etc. during
connection and disconnection.
• When connecting the flat wire to the connector, be careful with
the flat wire direction.
<Note 2b>
• When reattaching the Front panel assembly, make sure that
the door opener of the Side frame (R) is lowered in position
prior to the reinstallation.
• When reattaching the Front panel assembly, pay careful atten-
tion to the switch lever of the Front panel assembly not to make
it touch the switch knob of the Main board assembly from the
side.
• When reattaching the Front panel assembly, lift the Cassette
door slightly.
----------------------------------------
Step/
LocNo.
Part Name Fig.
No. Point Note
[1] Top cover 1-2-2d 3(S1a), 2(L1a)
[2] Front panel assembly 1-2-2d 2(S2a), 2(L2a), 2(L2b), <Note 2a>
1-2-2a 3(L2c) <Note 2b>
CN7001(WR2a)
(ADV.Jog board assembly) 3(S2b),
Knob assembly
[3] Mechanism assembly 1-2-2d CN2001(WR3a), <Note 2a>
(S3a), (S3b) <Note 3a>
(Drum Shield) (S3f), (L3a) <Note 3b>
(Drum assembly) 1-2-2b CN1(WR3b), <Note 3c>
1-2-2c (S3x), (S3y), (S3z)
[4] Main board assembly 1-2-2d (L4a), (L4b), (L4c),
(L4d)
Fig. 1-2-2a
Fig. 1-2-2b
Door
opener
Side
frame(R) Switch
knob
Switch
lever
<Note 3b>
(S3x)
(S3x)
(S3z) (S3z)
(S3y) (S3y)
Mechanism
assembly Drum
assembly
<NOTE>
Attach the Drum assembly appropriately,
since the installation state of the Drum assembly
influences the FM WAVEFORM LINEARITY
greatly.
HOOK
Fig. 1-2-2c
Shaft
Video heads
Motor
<Note 3a>
• Whenreattaching the Mechanismassembly, secure thescrews
(S3a to S3b) in the order of a, b.
<Note 3b>
• When reattaching the Mechanism assembly, be sure to align
the phase of the Rotary encoder on the Main board assembly.
• When reattaching the Mechanism assembly, set the “Mecha-
nism assembling mode”. (See “section 2 mechanism”.)
• When reattaching the Mechanism assembly to the Main board
assembly, take care not to damage the sensors and switch on
the Main board assembly.
<Note 3c>
• When reattaching the Drum assembly, secure the screws (S3x
to S3z) in the order of x, y, z.
• When handling the drum assembly alone, hold it by the motor
orshaft. Be carefulnot totouch otherparts, especiallythe video
heads. Also take care not to damage the connectors.
--------------------------
--------------------------
--------------------------

1-3
Fig. 1-2-2d
z
JS3001
Q3001
FW3001
Q3002
D3001
b
b
b
z
c
c
b
[2] FRONT PANEL
ASSEMBLY
[2] KNOB
ASSEMBLY
from CAPSTAN MDA
BOTTOM SIDE [2] FRONT PANEL
ASSEMBLY
TOP SIDE
WHITE LINE
CN7001
(S1a)
(L1a)
(S1a)
Before attaching TOP COVER, check to
see the wiring so that the wires should not
be damaged by TOP COVER.
(EX. FLAT WIRE of FRONT BOARD on
FRONT PANEL)
FFC WIRE and DRUM FPC WIRE should be
insert as follows.
CN CN CN
JS3001
(S2b)
(S2b)
(WR2a)
CN7003
(S1a)
(L1a)
[1] TOP COVER
[3] DRUM SHIELD
(S3c)
(S2a)
[3] MECHANISM
ASSEMBLY
[3] DRUM ASSEMBLY
(S3a)
(S2a) (S3b)
(S3x)
(S3y)
(S3z)
[4] MAIN BOARD
ASSEMBLY
BOTTOM CHASSIS
(L2a)
(L4a)
(L4b)
(L2b)
(L2c)
(L2c)
(L2a)
(L2b)
OK NG
90°
U/U(C)/JPN
WHITE LINE
NEUTRAL
BLUE
NEUTRAL
CN5001 CN5001
from JOG
WHITE LINE
VA5001
C5001
CN5001
CN2001
(WR2a)
(WR3a)
(WR3b)
(L4c)
(L4d)
FRONT PANEL back side
NOTE)
Insert FFC EIRE to the connector
before attaching to FRONT PANEL.
[2] ADV. JOG
BOARD ASSEMBLY
back side
NOTE)
When you fix any board assembly
with the screw, put it on the jigs.
Must confirm soldering condition as no
soldering and dry soldering at portion of
Power cord lead on MAIN BOARD before
attach MAIN BOARD to BOTTOM CHASSIS.
NOTE)
Accord the position of V gap on R.ENCORDER
and PWB silk .
Accord the position of Boss on R.ENCORDER
and PWB silk .
For the prevention of the DRUM FPC damage.
When you attach the MECHANISM ASSEMBLY on BOTTOM
CHASSIS. Attach the MECHANISM ASSEMBLY after the positioning
boss "Z" of the BOTTOM CHASSIS is matched to the positioning
hole of MECHANISM ASSEMBLY.
When fixing FRONT PANEL, pay attention
don't push each SWITCHS.(FRONT PANEL
should be attached withstrength of horizontal
direction)
After fixing FRONT PANEL, check each
switching operation, button operation and click.
Don't give pressure to BOTTOM CHSSIS from
side.
NOTE)
Hang the hook of the
TOP COVER in hold of
CHASSIS.
Check to see the following items, before TOP COVER
is attached.
(1) Wires should not be touched to PRIMARY PARTS
and HEAT PARTS easily.
(2) Parts for Insulation should be attached correctly.
NOTE)
SLOT TO FIT AT THE RIB OF
THE BOTTOM CHASSIS.
NOTE)
After screwing,execute the
adjustment inspection of the
tape running.
NOTE)
Confirm the DOOR OPENER is down.
attach the FRONT PANEL after the
CASSETE DOOR is lifted up.
Hang the fook of the TERMINAL BOARD
in hole of CHASSIS.
Ensure wire dressing along by the Left side of Tuner.
right side Ensure wire is not slunting after insert. POWER CORD arrangement
should be following drawing.
POWER CORD should not be touch to
the VA5001 and C5001.
NOTE
Insert direction of FCC WIRE as follows.
right side back side
electrode side supporting side
Insert direction of POWER CORD.
except U/U(C)/JPN
Insert the wire to even the root of connector
completely at the same time as inserting each
wire.
Hang the hook of CHASSIS on the MAIN BOARD ASSEMBLY.
WIRING
back side
right side
Bend to REAR side.
Hang the hook of CHASSIS on the MAIN BOARD ASSEMBLY.
Push to release.
Push to release.

1-4
Fig. 1-3a Jig RCU [PTU94023B]
1.3.1 Displaying the EMG information
The EMG detail of information can be displayed by transmit-
ting the code "59" from the Jig RCU.
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.
Jig RCU
Note:
•
The EMG detail information <1><2> show the information on
the latest EMG.
It becomes “ – – : – – : – –” when there is no latest EMG
record.
Fig. 1-3-1a EMG display of 7segment LED display model
0: 00
E: **
1E: **
1: *1
2: *2
3: 34
4: *5
5: *6
6: *7
7: *8
8: *9
9: *10
Normal display
EMG content display (Latest) See 1.3.4.
EMG content display (Previous) See 1.3.4.
EMG detail information <1> See 1.3.5.
[Deck operation mode]
EMG detail information <1> See 1.3.5.
[Mechanism operation mode]
EMG detail information <1> See 1.3.5.
[Mechanism sensor information and Mechanism mode position]
EMG detail information <2> See 1.3.6.
[Type of the cassette tape in use <1>]
EMG detail information <2> See 1.3.6.
[Winding position of the cassette tape in use]
EMG detail information <2> See 1.3.6.
[Type of the cassette tape in use <2> (Winding area)]
EMG detail information <3> See 1.3.7.
[Previous deck operation mode]
EMG detail information <3> See 1.3.7.
[The deck operation mode of the one before the last]
EMG detail information <3> See 1.3.7.
[The deck operation mode of the one prior to one above]
Fig. 1-3-1b EMG display of FDP display model
0: 00 : 00
E:**:**
*1: *2 : 34
*5: *6 : *7
*8: *9 : *10
EMG detail information <2> display See 1.3.6.
[Cassette display mode]
EMG detail information <3> display See 1.3.7.
[Deck mode history dispaly mode]
EMG detail information <1> display See 1.3.5.
[Deck and other mode display mode]
EMG content display (E:Latest:Previous) See 1.3.4.
[EMG code display mode]
Normal display (Counter or clock)
<Reference> EMG display of FDP display mode
(1) Transmit the code “59” from the Jig RCU.
The FDP shows the EMG content in the form of “E:**:**”.
<Example 1> E : 01 : 03
Previous EMG
Latest EMG
No EMG record
<Example 2> E : –– : – –
(2) Transmit the code “59” from the Jig RCU again.
The FDP shows the EMG detail information <1> in the form
of “ *1: *2 : 34 ”.
*1 : Deck operation mode at the moment of EMG
*2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of
EMG
–4 : Mechanism mode position at the moment of EMG
(3) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <2> in the form
of “ *5 : *6 : *7 ”.
*5 : Type of the cassette tape in use <1> .
*6 : Winding position of the cassette tape in use
*7 : Type of the cassette tape in use <2> (Winding area)
(4) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <3> in the form
of “*8 : *9 : *10”.
*8 : Previous deck operation mode at the moment of
EMG
*9 : The deck operation mode of the one before the last
at the moment of EMG
*10 : The deck operation mode of the one prior to one
above at the moment of EMG
(5) Transmit the code “59” from the Jig RCU once again to re-
set the display.
1.3.2 Clearing the EMG history
(1) Display the EMG history.
(2) Transmit the code “36” from the Jig RCU.
(3) Reset the EMG display.
1.3 Emergency display function
This unit saves details of the last two emergencies as the EMG
history and allows the status of the VCR and the mechanism
of each emergency to be shown both on the display and as
OSD information.
When using the emergency function, it is required to set the
VCR to the Jig RCU mode (the mode in which codes from the
Jig RCU can be received).

1-5
1.3.3 Details of the OSD display in the EMG display mode
During the EMG display, the OSD shows the data on the deck
mode, etc. The details of the display contents are as follows.
Notes:
•
The display is variable depending on the part No. of the
System Control microcomputer (IC3001) built into the
VCR. In the following, refer to the figure carrying the same
two characters as the top two characters of the part
number of your IC.
• The sensor information in the OSD display contents is par-
tially different from the mechanism sensor information in
EMG detail information <1>.
[For MN* only]
AA BB CC DD EE
FF GG HH I I J J
KK LL MM NN OO
PP QQ RR SS TT
UU VV WW XX YY
<Display>
** h
********
Encoder data
(See Mechanism mode sequence.)
Cassette tab present = 1
Cassette tab broken = 0
Cassette absent = 1
Cassette present = 0
Start sensor
End sensor
*FF: Sensor information details
AA : Deck operation mode (See EMG detail information <1>.)
BB :
Mechanism operation mode (See EMG detail of information <1>.)
CC : Mechanism transition flag
DD : Capstan motor control status
EE : Loading motor control status
F F : Sensor information (See sensor information details.)
GG : Capstan motor speed
HH : Key code (JVC code)
I I : Supply reel winding diameter data, higher 8 bits.
J J : Supply reel winding diameter data, lower 8 bits.
KK : Mechanism sensor information & mechanism mode position
(See EMG detail of information <1>.)
L L : Tape speed data, higher 8 bits.
MM : Tape speed data, lower 8 bits.
NN : Cassette tape type <2>, higher 8 bits.
(See EMG detail of information <2>.)
OO : Cassette tape type <2>, lower 8 bits.
(See EMG detail of information <2>.)
PP : General data display area
YY : General data display area
[For *HD only]
AA BB CC
DD EE FF
GGGG HHHH
I I JJJJ
KKKK LLLL MMMM
ROM No.
<Display>
** h
********
Encoder data
(See Mechanism mode sequence.)
Remote pause
End sensor
Start sensor
Cassette tab present = 1
Cassette tab broken = 0
*DD: Sensor information details
AA : Key code (JVC code)
BB : Deck operation mode (See EMG detail information <1>.)
CC: Mechanism operation mode (See EMG detail information <1>.)
DD : Sensor information (See sensor information details.)
EE : Capstan motor speed (Search, double speed)
F F : Tracking value
GGGG: Cassette tape type <2>, 16 bits.
(See EMG detail information <2>.)
HHHH: Supply reel winding diameter data
I I : Capstan motor speed (FF/REW, double speed)
JJJJ: Tape speed data, lower 8 bits.
KKKK: General data display area
LLLL: General data display area
MMMM : General data display area
[For both MN*/HD*]
LSA
LSB
LSC
LSD
Encoder output = Low
or
Trerminal - GND = SHORT
Encoder output = High
or
Trerminal - GND = OPEN
Mechanism mode - Encoder data
1110 987654321
Mechanism mode sequence
No. Position Encoder data
EJECT 0 h = 0000
EJECT1 1 h = 0001
EJECT2 2 h = 0010
ULSTOP 3 h = 0011
UPPER 4 h = 0100
ONSTOP(PLAY) 5 h = 0101
FWD/SS 6 h = 0110
REV/SS 7 h = 0111
OFFSTOP 8 h = 1000
FFREW-BRAKE 9 h = 1001
FFREW A h = 1010
MIDDLE F h = 1111
1
2
3
4
5
6
7
8
9
10
11
12
LSD
LSC
LSB
LSA
GND
12345

1-6
1.3.4 EMG content description
Note:
EMG contents “E08/E09” are for the model with Dynamic Drum (DD).
Table 1-3-4a
If the mechanism mode does not change to the next mode within 4 sec-
onds after the loading motor starts rotating in the loading direction, while
the mechanism is in the after-loading position (with the tape up against
the pole base), [E:01] is identified and the power is switched OFF.
However, if the tape loading is not completed within 4 seconds after
the loading motor starts rotating in the loading direction, the tape is
simply unloaded and ejected. No EMG data is recorded in this case.
When the mechanism mode cannot be changed to another mode
even when the loading motor has rotated for more than 4 sec-
onds in the unloading direction, [E:02] is identified and the power
is turned off.
When the falling edje of the take-up reel pulse has not been gen-
erated for more than 4 seconds in the capstan rotating mode,
[E:03] is identified, the pinch rollers are turned off and stopped,
and the power is turned off. In this case, however, the mecha-
nism should be in position after tape loading. Note that the reel
EMG is not detected during Slow/Frame advance operations.
When the drum FG pulse has not been input for more than 3 sec-
onds in the drum rotating mode, [E:04] is identified, the pinch roll-
ers are turned off and stopped, and the power is turned off.
If the cassette does not reach the eject position within about 0.7
seconds after the cassette housing has started the cassette ejec-
tion operation, [E:05] is identified, the drive direction is reversed
to load the tape, the mode is switched to STOP mode with the
pinch roller OFF, and the power is switched OFF.
During the cassette insertion process, the drive direction is reversed
and the cassette is ejected if the tape is not up against the pole
base within about 3 seconds after the start of the cassette pulling-
in operation. If the cassette does not reach the eject position within
about 0.7 seconds after the drive mode reversal operation, [E:05]
is identified and the power is switched OFF immediately.
When the capstan FG pulse has not been generated for more
than 1 second in the capstan rotating mode, [E:06] is identified,
the pinch rollers are turned off and stopped, and the power is
turned off.However, the capstan EMG is not detected in SLOW/
STILL modes.
Note that, if the part number of the System Control IC begins with
“MN” or “M3”, the capstan EMG is not detected even during the
FF/REW operation.
When short-circuiting of the SW power supply with GND has lasted
for 0.5 second or more, [E:07] is identified, all the motors are
stopped and the power is turned off.
When DD tilting does not complete in 4 seconds, [E:08] is identi-
fied, the tilt motor is stopped and the power is turned off.
When the DD FG pulse is not generated within 2.5 seconds, [E:09]
is identified, the tilt motor is stopped and the power is turned off.
When the falling edge of the supply reel pulse has not been gen-
erated for more than 10 seconds in the capstan rotating mode,
[E:0A] is identified and the cassette is ejected (but the power is
not turned off). In this case, however, the mechanism should be
in the position after tape loading (with the tape up against the pole
base). Also note that the reel EMG is not detected during Slow/
Frame advance operations.
1. The mechanism is locked in the middle of the mode transition during a tape loading operation.
2.
The mechanism overruns during the tape loading operation because the SYSCON cannot recognize
the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure.
3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in
the middle.)
1. The mechanism is locked in the middle of mode transition.
2. Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejec-
tion is attempted while the tape is still inside the mechanism.) because the SYSCON
cannot recognize the mechanism mode normally. This is due to a cause such as a
rotary encoder failure. (Mechanism position: UPPER)
3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)
1. The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD
SEARCH/FF, etc.) because;
1)The idler gear is not meshed with the take-up reel gear because the mechanism mal-
functions for some reason.
2)
The idler gear is meshed with the take-up reel gear, but incapable of winding due to
too large mechanical load (abnormal tension);
3)The reel is rotating normally but an FG pulse is not generated due to the take-up reel
sensor failure.
2. The supply reel pulse is not generated in the REV transport modes (REV SEARCH/
REW, etc.) because;
1) The idler gear is not meshed with the supply reel gear because the mechanism mal-
functions for some reason.
2) The idler gear is meshed with the supply reel gear, but incapable of winding due to
too large a mechanical load (abnormal tension);
3) The reel rotates normally but the FG pulse is not generated due to a supply reel
sensor failure.
3. Power(SW5V) is not supplied to the reel sensor on the tape winding side.
1. The drum could not start or the drum rotation has stopped due to too large a load on
the tape, because;
1) The tape tension is abnormally high;
2)
The tape is damaged or a foreign object (grease, etc.) adheres to the tape.
2. The drum FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (hall device) of the drum is faulty.
3. The drum control voltage (DRUM CTL V) is not supplied to the MDA.
4. Power (M12V) is not supplied to the drum MDA.
1. The cassette cannot be ejected due to a failure in the drive mechanism of the housing.
2. When the housing load increases during ejection, the loading motor is stopped because
of lack of headroom in its drive torque.
Housing load increasing factors: Temperature environment (low temperature, etc.),
mechanism wear or failure.
3. The sensor/switch for detecting the end of ejection are not functioning normally.
4. The loading motor drive voltage is lower than specified or power (M12V) is not sup-
plied to the motor (MDA).
5. When the user attempted to eject a cassette, a foreign object (or perhaps the user's
hand) was caught in the opening of the housing.
1. The capstan could not start or the capstan rotation has stopped due to too large a load
on the tape, because;
1) The tape tension is abnormally high (mechanical lock);
2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occur-
rence of tape entangling, etc.).
2. The capstan FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (MR device) of the capstans is faulty.
3. The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.
4. Power (M12V, SW5V) are not supplied to the capstan MDA.
1. The SW 5 V power supply circuit is shorted with GND.
2. The SW 12 V power supply circuit is shorted with GND.
1. The absolute value sensor is defective. (The soldered parts have separated.)
2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.)
3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value
sensor.
4.
The absolute value sensor data is not sent to the System Controller CPU.
1. The FG sensor is defective. (The soldered parts have separated.)
2. The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.)
3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.
4. The power (5V) to the sensor is not supplied. (Connection failure/soldering failure)
5. The FG pulse is not sent to the System Controller CPU.
6.
The tilt motor is defective. (The soldered parts have separated.)
7. The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)
8. The tilt motor drive MDA - IC is defective.
9. Auto-recovery of the DD tilting cannot take place due to overrun.
1. The supply reel pulse is not generated in the FWD transport mode (PLAY/FWD
SEARCH/FF, etc.) because;
1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cassette is cut in
the middle;
2) A mechanical factor caused tape slack inside and outside the supply reel side of the
cassette shell. In this case, the supply reel will not rotate until the tape slack is re-
moved by the FWD transport, so the pulse is not generated until then;
3) The reel is rotating normally but the FG pulse is not generated due to a supply reel
sensor failure.
2. The take-up reel pulse is not generated in the REV transport mode (REV SEARCH/
REW, etc.).
1) REV SEARCH/REW is started when the tape in the inserted cassette has been cut
in the middle;
2) A mechanical factor caused tape slack inside and outside the take-up reel side of
the cassette shell. In this case, the take-up reel will not rotate until the tape slack is
removed by the REV transport, so the pulse will not be generated until that time;
3) The reel is rotating normally but the FG pulse is not generated due to a take-up reel
sensor failure.
3. The power (SW 5V) to a reel sensor is not supplied.
FDP CONTENT CAUSE
Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output channels (without regard
to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:U1] is identified and recorded in the emergency history.
During the period in which the head clog is detected, the FDP shows "U:01" and the OSD repeats the “3 seconds of warning display” and the “7 seconds of
noise picture display” alternately.
EMG code : “E:C1” or “E:U1” / FDP : “U:01” / OSD : “Try cleaning tape.” or “Use cleaning cassette.”
The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode
than PLAY.
EU1:
Head clog warning
history
E0A: Supply Reel
Pulse EMG
E07:SW Power
Short-Circuit
EMG
E06: Capstan FG
EMG
E05: Cassette Eject
EMG
E04: Drum FG EMG
E03: Take Up Reel
Pulse EMG
E02:
Unloading EMG
E01: Loading EMG
E08: DD Initialized
(Absolute
Position
Sensor) EMG
E09: DD FG EMG

1-7
1.3.5 EMG detail information <1>
The status (electrical operation mode) of the VCR and the status
(mechanism operation mode/sensor information) of the mechanism
in the latest EMG can be confirmed based on the figure in EMG
detail information <1> .
[FDP/OSD display]
*1 : *2 : 34
*1 : Deck operation mode at the moment of EMG
*2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of EMG
–4 : Mechanism mod
e position at the moment of EMG
Note:
•
For EMG detailed information <1>, the content of the code
that is shown on the display (or OSD) differs depending on
the parts number of the system control microprocessor
(IC3001) of the VCR. The system control microprocessor parts
number starts with two letters, refer these to the correspond-
ing table.
*1 : Deck operation mode
[Common table of MN* and HD]
00 - Mechanism being initialized
01 00 STOP with pinch roller pressure off (or tape present with P.OFF)
02 01 STOP with pinch roller pressure on
03 - POWER OFF as a result of EMG
04 04 PLAY (Normal playback)
0C 0E REC
10 11 Cassette ejected
20 22 FF
21 - Tape fully loaded, START sensor ON, short FF
22 - Cassette identification FWD SEARCH before transition to FF (SP
x7-speed)
24 26 FWD SEARCH (variable speed) including x2-speed
2C 2E INSERT REC
40 43 REW
42 - Cassette identification REV SEARCH before transition to REW (SP
x7-speed)
44 47 REV SEARCH (variable speed)
4C 4C AUDIO DUB
6C 6E INSERT REC (VIDEO + AUDIO)
84 84 FWD STILL / SLOW
85 85 REV STILL / SLOW
8C 8F REC PAUSE
8D - Back spacing
8E - Forward spacing (FWD transport mode with BEST function)
AC AF INSERT REC PAUSE
AD - INSERT REC back spacing
CC CD AUDIO DUB PAUSE
CD - AUDIO DUB back spacing
EC EF INSERT REC (VIDEO + AUDIO) PAUSE
ED - INSERT REC (VIDEO + AUDIO) back spacing
*2 : Mechanism operation mode
[Table of MN*]
[Table of HD*]
Display Mechanism operation mode
00 STOP with pinch roller pressure off
01 STOP with pinch roller pressure on
02 U/L STOP (or tape being loaded)
04 PLAY (Normal playback)
05 PLAY (x1-speed playback using JOG)
0E REC
11 Cassette ejected
22 FF
26 FWD SEARCH (variable speed) including x2-speed
2E INSERT REC
43 REW
47 REV SEARCH
4C AUDIO DUB
6E INSERT REC (VIDEO + AUDIO)
84 FWD STILL/SLOW
85 REV STILL/SLOW
8F REC PAUSE
AF INSERT REC PAUSE
C7 REV SEARCH (x1-speed reverse playback using JOG)
CD AUDIO DUB PAUSE
EF INSERT REC (VIDEO + AUDIO) PAUSE
F0 Mechanism being initialized
F1 POWER OFF as a result of EMG
F2 Cassette being inserted
F3 Cassette being ejected
F4 Transition from STOP with pinch roller pressure on to STOP with pinch roller
pressure off
F5 Transition from STOP with pinch roller pressure on to PLAY
F6 Transition from STOP with pinch roller pressure on to REC
F7 Cassette type detection SEARCH before FF/REW is being executed
F8 Tape being unloaded
F9 Transition from STOP with pinch roller pressure off to STOP with pinch roller
pressure on
FA Transition from STOP with pinch roller pressure off to FF/REW
FB Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)
FC Transition from STOP with pinch roller pressure off to cassette type detec-
tion SEARCH
FD Short REV being executed after END sensor on during unloading
FE Tension loosening being executed after tape loading (STOP with pinch roller
pressure on)
FF Tape being unloaded
Display Deck operation mode
MN* HD*
Display Mechanism operation mode
00 Command standby (No command to be executed)
01 Immediate Power OFF after EMG occurrence
02 Loading from an intermediate position during mechanism initialization
03 Unloading due to EMG occurrence during mechanism initialization
04 Ejecting cassette (ULSTOP to EJECT)
05 Inserting cassette (EJECT to ULSTOP)
06 Loading tape (ULSTOP to PLAY)
07 Unloading tape (PLAY to ULSTOP)
08 Transition from pinch roller ON to STOP
09 Transition from pinch roller OFF to STOP (PLAY to OFFSTOP)
0A Transition from pinch roller OFF to STOP at power OFF
0B Transition from pinch roller ON to STOP at power ON
0C Transition to PLAY
0D Transition to Search FF
0E Transition to REC
0F Transition to FWD STILL/SLOW
10 Transition to REV STILL/SLOW
11 Transition to Search REV
12 Transition from FF/REW to STOP
13 Transition to FF
14 Transition to REW
15 Tape end detection processing during loading
16 Short FWD/REV at tape sensor ON during unloading
17 Transition to FF/REW brake mode

1-8
-0 Not established
-1 EJECT EJECT position
-2 EJECT-EJECT1 Intermodal position
-3 EJECT1 EJECT1 position
-4 EJECT1-EJECT2 Intermodal position
-5 EJECT2 EJECT2 position
-6 EJECT2-ULSTOP Intermodal position
-7 ULSTOP ULSTOP position
-8 ULSTOP-UPPER Intermodal position
-9 UPPER Loading (unloading) tape
-A UPPER-ONSTOP Intermodal position
-B ONSTOP PLAY position
-C PLAY-FWD/SS Intermodal position
-D FWD/SS FWD (FWD Still/Slow) position
-E FWD/SS-REV Intermodal position
-F REV REV (REV Still/Slow) position
-0 REV-OFFSTOP Intermodal position
-1 OFFSTOP Pinch roller OFF position
-2 OFFSTOP-FFREWB Intermodal position
-3 FFREWB FF/REW Brake position
-4 FFREWB-FFREW Intermodal position
-5 FFREW FF/REW position
3– : Mechanism sensor information
[Common table of MN* and HD*]
*6 : Cassette tape winding position
The cassette tape winding position at the moment of EMG is dis-
played by dividing the entire tape (from the beginning to the end) in
21 sections using a hex number from “00” to “14”.
“00” : End of winding
“14” : Beginning of winding
“FF” : Tape position not identified
–4 : Mechanism mode position
[Common table of MN* and HD*]
Note:
•
The values of cassette tape type <2> in the above table are
typical values with representative cassette tapes.
*7 : Cassette tape type <2> (Winding area)
Notes:
•
Cassette tape type <1> is identified a few times during mode tran-
sition and the identification count is variable depending on the cas-
sette tape type. If an EMG occurs in the middle of identification, the
cassette tape type may not be able to be identified.
• If other value than those listed in the above table is displayed,
the cassette tape type is not identified.
Display Cassette tape type <1>
00 Cassette type not identified
16 Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified
82 Small reel, thick tape (T-120) identified/thin tape (T-140) identified
84 Large reel (T-0 to T-60) identified
92 Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified
93 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified
C3 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
D3 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
E1 C cassette, thick tape (TC-10 to TC-20) identified
E2 Small reel, thick tape (T-0 to T-100) identified
E9 C cassette, thin tape (TC-30 to TC-40) identified
F1
C cassette, thick tape/thin tape (TC-10 to TC-40) not classified
*5 : Cassette tape type <1>
Note:
•
EMG detail information <2> is the reference information
stored using the remaining tape detection function of the cas-
sette tape. As a result, it may not identify cassette correctly
when a special cassette tape is used or when the tape has
variable thickness.
1.3.6 EMG detail information <2>
The type of the cassette tape and the cassette tape winding posi-
tion can be confirmed based on the figure in EMG detail informa-
tion <2> .
[FDP/OSD display]
*5 :*6 :*7
*5 : Type of the cassette tape in use <1>
*6 : Winding position of the cassette tape in use
*7 : Type of th
e cassette tape in use <2> (Winding area)
0- Tab broken ON ON ON
ON
ON
ON
1- Tab broken ON
2- Tab broken ON
3- Tab broken ON OFF
OFF OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
ON
OFF
4- Tab present ON
5- Tab present
6- Tab present OFF ON
7- Tab present OFF
OFF
OFF
OFF
OFF
8- Tab broken ON ON
ON
9- Tab broken ON
ON
ON
A- Tab broken
B- Tab broken OFF
OFF
C- Tab present ON
ON
D- Tab present
E- Tab present OFF
F- Tab present OFF
OFF
OFF
OFF OFF
OFF
OFF
Mechanism sensor information
Display
REC safety SW Start sensor End sensor Mechansim
position sensor
Display Cassette tape type <2> (Reference) Word data
(Beginning) (End)
00
04 - 08
05 - 06
05 - 0C
06 - 0C
06 - 0C
07 - 08
09 - 0B
0C - 0D
0D - 0F
0E - 10
10 - 12
10 - 13
11 - 14
12 - 14
13 - 14
13 - 14
13 - 14
13 - 14
15 - 16
16 - 17
17 - 18
19 - 1B
Cassette type not identified
C cassette, thick tape TC-10
Small reel, thick tape T-20
C cassette, thick tape TC-20P
C cassette, thin tape TC-40
C cassette, thin tape TC-30
Small reel, thick tape T-40
Small reel, thick tape T-60
Small reel, thick tape T-80(DF-160)
Small reel, thick tape T-90(DF-180)
Small reel, thick tape T-100
Small reel, thin tape T-140
Small reel, thick tape T-120(DF-240)
Small reel, thick tape T-130
Small reel, thin tape T-160
Small reel, thin tape T-210(DF-420)
Small reel, thin tape T-180(DF-360)
Small reel, thin tape T-168
Small reel, thick tape DF-300
Large reel T-20
Large reel T-30
Large reel T-40
Large reel T-60
(0497 - 0506) (0732 - 0858)
(05A9 - 0661)
(0599 - 05FF) (0AA1 - 0C07)
(0623 - 063D) (0C41 - 0CC3)
(0611 - 0638) (0C0C - 0CB2)
(07CC - 08E5)
(09FD - 0B78)
(0C20 - 0DFC)
(0D31 - 0F3E)
(0E43 - 107F)
(10E1 - 120C)
(1073 - 1313)
(1185 - 1429)
(12D3 - 141F)
(1373 - 14C3)
(1357 - 14C0)
(1395 - 14EE)
(13A8 - 14CE)
(1536 - 1618)
(1647 - 175A)
(1759 - 189C)
(1989 - 1B2F)
Tab broken = 0 Sensor ON = 0 Sensor ON = 0
Tab present = 1 sensor OFF = 1 Sensor OFF = 1
1.3.7 EMG detail information <3>
Three deck operation modes preceding the deck operation
mode in which the EMG occurs may be confirmed based on
the figures in the EMG information detail <3>. For the contents
of the displayed information, see the table "Deck operation
mode" in section "1.3.5 EMG detail information <1>".
Mechanism
sensor
information Dis-
play Deck operation mode
Even number
(0, 2, 4, 6, 8,
A, C, E)
Odd number
(1, 3, 5, 7, 9,
B, D, F)

1-9
1.4 Service position
This unit has been designed so that the Mechanism and Main
board assemblies can be removed together from the chassis
assembly. Before diagnosing or servicing the circuit boards,
take out the major parts from the chassis assembly.
1.4.1 How to set the “Service position”
(1) Refer to the disassembly procedure and perform the dis-
assembly of the major parts before removing the Mecha-
nism assembly.
(2) Remove the screws that fix the Mechanism assembly to the
Chassis assembly. If any other screws are used to fix the
boards, remove them also.
(3) Remove the combined Mechanism and Main board assem-
blies.
(4) If any other major parts are used, remove them also.
(5) Connect the wires and connectors of the major parts that
have been removed in steps (1) to (4). (Refer to Fig. 1-2-2d.)
(6) Place the combined Mechanism, Main board and other
board assemblies upside down.
(7) Insert the power cord plug into the power outlet and then
proceed with the diagnostics and servicing of the board as-
sembly.
Notes:
•
Before inserting the power cord plug into the power out-
let, make sure that none of the electrical parts are able to
short-circuit between the workbench and the board as-
sembly.
• For the disassembly procedure of the major parts and de-
tails of the precautions to be taken, see “1.2 Removing
the major parts”.
• If there are wire connections from the Main board and
Mechanism assemblies to the other major parts, be sure
to remove them (including wires connected to the major
parts) first before performing step (2).
• When carrying out diagnosis and repair of the Main board
assembly in the “Service position”, be sure to ground both
the Main board and Mechanism assemblies. If they are im-
properly grounded, there may be noise on the playback
picture or FDP counter display may move even when the
mechanism is kept in an inoperative status.
• In order to diagnose the playback or recording of the cas-
sette tape, set the Mechanism assembly to the required
mode before placing it upside down. If the mechanism
mode is changed (including ejection) while it is in an up-
side down position the tape inside may be damaged.
• For some models, the mechanism and board assemblies
are attached by connectors only. When carrying out a di-
agnosis or repair of the boards in the “Service position”,
make sure that the connectors are not disconnected.
Fig. 1-4-1a
1.6 Mechanism service mode
This model has a unique function to enter the mechanism into
every operation mode without loading of any cassette tape. This
function is called the “Mechanism service mode”.
1.6.1 How to set the “Mechanism service mode”
(1) Set the VCR to the Jig RCU mode (the mode in which codes
from the Jig RCU can be received).
(2) Transmit the code “E5” from the Jig RCU.
(3) Release the lug of the Cassette holder and then slide the
Cassette holder toward the direction where the Cassette
holder is loaded by manually.
(4) The cassette holder lowers and, when the loading has com-
pleted, the mechanism enters the desired mode.
When the VCR is set to the Mechanism service mode, the
symbols (“Timer”) in the FDP (LED) are blinked.
1.6.2 How to exit from the "Mechanism service mode"
(1) Unplug the power cord plug from the power outlet.
1.5 Jig RCU mode
This unit uses the following two modes for receiving remote
control codes.
1) User RCU mode : Ordinary mode for use by the user.
2) Jig RCU mode : Mode for use in production and servic-
ing.
TP106
PB.FM
Main board
assembly
TP111
D.FF
TP4001
CTL.P
TP2253
A.PB
TP2254
A.REC
User RCU mode Jig RCU mode
(not displayed)
When using the Jig RCU, it is required to set the VCR to the
Jig RCU mode (the mode in which codes from the Jig RCU
can be received). As both of the above two modes are stored
in the EEPROM, it is required to set the VCR back to the User
RCU mode each time that an adjustment is made or to check
that the necessary operations have been completed. These
modes can be set by the operations described below.
Note:
• Confirm the RCU mode when exchanged parts. Since
some SERVICE PARTS sets VCR to the Jig RCU mode as
initial setting.
1.5.1 Setting the Jig RCU mode
(1) Unplug the power cord plug from the power outlet.
(2) Press and hold the “REC” and “PAUSE” buttons on the VCR
simultaneously, while plugging the power cord plug into the
power outlet.
When the VCR is set to the Jig RCU mode, the symbols
( “ : ” ) in the time display of the FDP are turned off.
1.5.2 Setting the User RCU mode
(1) Turn off the power.
(2) Press the “REC” and “PAUSE” buttons of the VCR simulta-
neously. Alternatively, transmit the code “80” from the Jig
RCU.
Fig. 1-5-1a

1-10
Tape transport
Drum assembly
A/C head
Pinch roller arm assembly
Full erase head
Tension arm assembly
Capstan motor (Shaft)
Guide arm assembly
Capstan motor
Capstan brake assembly
Main brake assembly
Belt (Capstan)
Loading motor
Clutch unit
Worm gear
Control plate
Rotary encoder
C,X
C,X
C
C
C
C
C
X
X
C,X
C
C
C
C
C
X
X
X
X
X
X
X
X
X
Operation hours
1000H 2000H
Drive
System Parts name
C : Cleaning
X : Inspection or Replacement if necessary
Other
1.7 Maintenance and inspection
1.7.1 Cleaning
Regular cleaning of the transport system parts is desirable but
practically impossible. So make it a rule to carry out cleaning
of the tape transport system whenever the machine is serv-
iced.
When the video head, tape guide and/or brush get soiled, the
playback picture may appear inferior or at worst disappear, re-
sulting in possible tape damage.
Note:
•
Absolutely avoid sweeping the upper drum vertically as
this will cause damage to the video head.
(1) When cleaning the upper drum (especially the video head),
soak a piece of closely woven cloth with alcohol and while
holding the cloth onto the upper drum by the fingers, turn
the upper drum counterclockwise.
(2) To clean the parts of the tape transport system other than
the upper drum, use a piece of closely woven cloth or a
cotton swab soaked with alcohol.
(3) After cleaning, make sure that the cleaned parts are com-
pletely dry before using the cassette tape.
Fig. 1-7-1a
1.7.2 Lubrication
With no need for periodical lubrication, you have only to lubri-
cate new parts after replacement. If any oil or grease on con-
tact parts is soiled, wipe it off and newly lubricate the parts.
Note:
•
See the “mechanism assembly” diagram of the “parts list”
for the lubricating or greasing spots, and for the types of
oil or grease to be used.
1.7.3 Suggested servicing schedule for main components
The following table indicates the suggested period for such
service measures as cleaning, lubrication and replacement. In
practice, the indicated periods will vary widely according to en-
vironmental and usage conditions. However, the indicated com-
ponents should be inspected when a set is brought for service
and the maintenance work performed if necessary. Also note
that rubber parts may deform in time, even if the set is not used.
Video heads
A/C head
SECTION 2
MECHANISM
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
MECHANISM ASSEMBLY

3-1
SECTION 3
ADJUSTMENT
3.1.1 Precaution
3.1.3 Required adjustment tools
3.1.4
Color (colour) bar signal, color (colour) bar pattern
Fig. 3-1-5a Jig RCU [PTU94023B]
3.1.5 Switch settings
When adjusting this unit, set the VCR mode and switches
as described below.
• When using the Jig RCU, it is required to set the VCR to
the Jig RCU mode (the mode in which codes from the Jig
RCU can be received). (See "section 1 disassembly".)
•
Set the switches as shown below unless otherwise speci-
fied on the relevant adjustment chart. The switches that are
not listed below can be set as desired.
If the VCR is not equipped with the functions detailed be-
low, setup is not required.
• The adjustments of this unit include the mechanism
compatibility and electrical adjustments. During the
performance of this work, be sure to observe the pre-
cautions for each type of adjustment.
• If there is a reference to a signal input method in the
signal column of the adjustment chart, “Ext. S-input”
means the Y/C separated video signal and “Ext. input”
means the composite video signal input.
• Unless otherwise specified, all measuring points and
adjustment parts are located on the Main board.
White(75%)
100 IRE
40 IRE
Horizontal sync
QI
1V
White(100%)
Yellow Cyan
Green
Magenta
Red
Blue
Burst
40 IRE
White
Yellow
Cyan
Green
Magenta
Red
Blue
Q I Black
White
100%
(75%)
•
Color(colour) bar signal [NTSC]
•
Color(colour) bar pattern [NTSC]
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.
Jig RCU
AUTO PICTURE/VIDEO CALIBRATION/ OFF
B.E.S.T./D.S.P.C.
PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL
VIDEO STABILIZER OFF
TBC ON
Digital 3R ON
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK OFF
3.1.2 Required test equipments
• Color (colour) television or monitor
• Oscilloscope:
wide-band,dual-trace,triggereddelayed sweep
• Signal generator: RF / IF sweep / marker
• Signal generator: stairstep, color (colour) bar [NTSC]
• Recording tape
• Digit-key remote controller(provided)
: Used : Not used
Mechanism
compatibility
adjustment
Electrical
adjustment
Roller driver
Jig RCU
Back tension cassette gauge
Alignment tape(MHP)
Alignment tape(MHP-L)
Roller driver
PTU94002
Back tension cassette gauge
PUJ48076-2
Jig RCU
PTU94023B
Alignment tape
(SP, stairstep, NTSC)
MHP
Alignment tape
(EP, stairstep, NTSC)
MHP-L
3.1 Before adjustment

3-2
3.2 Mechanism compatibility adjustment
Notes:
• Although compatibility adjustment is very important, it is not
necessary to perform this as part of the normal servicing
work. It will be required when you have replaced the A/C head,
drum assembly or any part of the tape transport system.
• To prevent damaging the alignment tape in the compatibility
adjustment, prepare a cassette tape (for self-recording/play-
back), perform a test on it by transporting it and making sure
that the tape is not bent by the tape transport mechanisms
such as in the guide rollers.(See Fig.3-2-2a.)
3.2.1 Tension pole position
Signal (A) •Back tension cassette gauge
[PUJ48076-2]
Mode (B1) •PB
(B2) •Eject end
Adjustment part (F) •Adjust pin [Mechansim assembly]
Specified value (G) •25 - 51 gf•cm (2.45 – 5 ×10-3 Nm)
Notes:
• This adjustment must be performed every time the tension
band is replaced.
(1) Play back the back tension cassette gauge (A).
(2) Check that the indicated value on the left side gauge is
within the specified value (G).
(3) If the indicated value is not within the specified value (G),
perform the adjustment in a following procedure.(See
Fig.3-2-1a.)
1) Remove the top frame, cassette holder and side
frames (L/R) all together. (See “section 2 mecha-
nism”.)
2) Rotate the loading motor gear to move the control plate
so that the triangular stamping to the left of the “P”
stamping is aligned with the stamping (a) on the main
deck. This positioning is mode (B1).
3) Adjust by turning the adjustment pin so that the tip of
the tension arm is aligned with the stamping (b) on
the main deck.
4) Rotate the reel disk (S) by about one turn clockwise
and make sure that the round hole of the adjustment
pin is located in the “OK” range.
If it is outside this range, restart the adjustment from
the beginning.
After completion of the adjustment, rotate the loading gear
motor to return it to the mode (B2) position.
OK
NG
ADJUST PIN
TENSION ARM
Stamping(b)
Stamping(a)
CONTROL PLATE
Fig. 3-2-1a
3.1.7 EVR adjustment
Some of the adjustments require the adjustment performed
by the EVR system. The main unit have EEPROMs for stor-
ing the EVR adjustment data and user setups.
Notes:
• In the EVR adjustment mode, the value is varied with
the channel buttons (+, –). The adjusted data is stored
when the setting mode changes (from PB to STOP,
when the tape speed is changed, etc.). Take care to
identify the current mode of each adjustment item
when making an adjustment.
• When changing the address setting in the EVR adjust-
ment mode, use the Jig RCU or the remote controller
having numeric keypad with which a numeric code can
be directly input.
The remote control code of the Jig RCU corresponds
to each of the digit keys on the remote controller as
follows.
• As the counter indication and remaining tape indica-
tion are not displayed FDP during the EVR adjustment
mode, check them on the TV monitor screen.
• When performing the EVR adjustment, confirm that the
FDP indication is changed to the EVR mode, as shown
below.
Digit-key 0 1 2 3 4 5 6 7 8 9
Code 20 21 22 23 24 25 26 27 28 29
FDP
Fig. 3-1-7a EVR mode
3.1.6
Manual tracking mode (Auto tracking ON/OFF) setting
(1) In order to set to the manual tracking mode during tape
playback, press the “SP/EP(LP)” button on the remote
control unit.
• Each press of the button switches the auto tracking ON
or OFF.
• When the auto tracking is OFF, the monitor screen dis-
plays “AT: OFF”.
• When the manual tracking mode is set, the tracking is
placed at the center position.
(2) Press “channel +/-” to adjust the tracking manually.

3-3
3.2.3 Height and tilt of the A/C head
Note:
• Set a temporary level of the height of the A/C head in
advance to make the adjustment easier after the A/C
head has been replaced. (See “section 2 mechanism”.)
(1) Play back the alignment tape (A).
(2) Apply the external trigger signal to D.FF (E), to observe
the AUDIO OUT waveform and Control pulse waveform
at the measuring points (D1) and (D2) in the ALT mode.
(3) Set the VCR to the manual tracking mode.
(4) Adjust the AUDIO OUT waveform and Control pulse
waveform by turning the screws (1), (2) and (3) little by
little until both waveforms reach maximum. The screw (1)
and (3) are for adjustment of tilt and the screw (2) for azi-
muth.
Signal (A) • Alignment tape(SP, stairstep, NTSC) [MHP]
Mode (B) •PB
Equipment (C) •Oscilloscope
Measuring point (D1) •AUDIO OUT terminal
(D2) •TP4001 (CTL. P)
External trigger (E) •TP111 (D.FF)
Adjustment part (F) •A/C head [Mechanism assembly]
Specified value (G) •Maximum waveform
Fig. 3-2-3a
3.2.2 FM waveform linearity
Signal (A1) • Alignment tape(SP, stairstep, NTSC) [MHP]
(A2) • Alignment tape(EP, stairstep, NTSC) [MHP-L]
Mode (B) •PB
Equipment (C) •Oscilloscope
Measuring point (D) •TP106 (PB. FM)
External trigger (E) •TP111 (D.FF)
Adjustment part (F) •Guide roller [Mechanism assembly]
Specified value (G) •Flat V.PB FM waveform
Adjustment tool (H) •Roller driver [PTU94002]
(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe
the V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4)
Make sure that there is no significant level drop of the V.PB
FM waveform caused by the tracking operation, with its
generally parallel and linear variation ensured. Perform the
following adjustments when required. (See Fig. 3-2-2b.)
(5) Reduce the V.PB FM waveform by the tracking opera-
tion. If a drop in level is found on the left side, turn the
guide roller of the pole base assembly (supply side) with
the roller driver to make the V.PB FM waveform linear.
If a drop in level is on the right side, likewise turn the guide
roller of the pole base assembly (take-up side) with the
roller driver to make it linear. (See Fig. 3-2-2b.)
(6) Make sure that the V.PB FM waveform varies in parallel
and linearly with the tracking operation again. When re-
quired, perform fine-adjustment of the guide roller of the
pole base assembly (supply or take-up side).
(7) Unload the cassette tape once, play back the alignment
tape (A1) again and confirm the V.PB FM waveform.
(8)
After adjustment, confirm that the tape wrinkling does not
occur at the roller upper or lower limits. (See Fig. 3-2-2a.)
[Perform adjustment step (9) only for the models
equipped with SP mode and EP (or LP) mode.]
(9) Repeat steps (1) to (8) by using the alignment tape (A2).
(a) GUIDE ROLLER
(b) GUIDE POLE
Improper Proper
• Proper waveform variation
• Improper waveform variation
A
B
CD
Up Down
Guide roller
(supply side)
Roller driver
Fig. 3-2-2a
Fig. 3-2-2b
Head base
A/C head
AUDIO OUT
CTL. P
(1)
(2)
(3)

3-4
Note:
The following adjustment procedures are not only necessary
after replacement of consumable mechanical parts or board
assemblies, but are also provided as references to be re-
ferred to when servicing the electrical circuitry.
In case of trouble with the electrical circuitry, always begin a
service by identifying the defective points by using the meas-
uring instruments as described in the following electrical ad-
justment procedures. After this, proceed to the repair, re-
placement and/or adjustment. If the required measuring in-
struments are not available in the field, do not change the
adjustment parts (variable resistor, etc.) carelessly.
3.3.1 Servo circuit
3.3.1.1 Switching point
3.3 Electrical adjustment
Fig. 3-3-1-1a Switching point
V.sync
Trigger point Switching point
V. rate
Signal (A1) • Stairstep signal
(A2) • Alignment tape (EP,stairstep,NTSC) [MHP-L]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1) • VIDEO OUT terminal (75Øterminated)
(D2) • TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • Jig RCU: Code “5A”
Specified value (G) • 7.5 ± 0.5H
Adjustment tool (H) • Jig RCU [PTU94023B]
(1) Play back the signal (A1) of the alignment tape (A2).
(2) Apply the external trigger signal to D.FF (E) to observe
the VIDEO OUT waveform and V.PB FM waveform at the
measuring points (D1) and (D2).
(3) Set the VCR to the manual tracking mode.
(4) Adjust tracking so that the V.PB FM waveform becomes
maximum.
(5) Set the VCR to the Auto adjust mode by transmitting the
code (F) from the Jig RCU. When the VCR enters the
stop mode, the adjustment is completed.
(6) If the VCR enters the eject mode, repeat steps (1) to (5)
again.
(7) Play back the alignment tape (A2) again, confirm that the
switching point is the specified value (G).
3.3.1.2 Slow tracking preset
Signal (A1) • Ext. input
(A2) • Color (colour) bar signal [NTSC]
Mode (B1) • S-VHS SP
(B2) • S-VHS EP
Measuring point (D) • TV-Monitor
Adjustment part (F) • Jig RCU: Code “71“ or “72”
Specified value (G) • minimum noise
Adjustment tool (H) • Jig RCU [PTU94023B]
3.2.4 A/C head phase (X-value)
Signal (A1) • Alignment tape(SP, stairstep, NTSC) [MHP]
(A2) • Alignment tape(EP, stairstep, NTSC) [MHP-L]
Mode (B) •PB
Equipment (C) •Oscilloscope
Measuring point (D) •TP106 (PB. FM)
External trigger (E) •TP111 (D.FF)
Adjustment part (F) • A/C head base [Mechanism assembly]
Specified value (G) •Maximum V.PB FM waveform
Adjustment tool (H) •Roller driver [PTU94002]
(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe
the V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Loosen the screws (4) and (5), then set the Roller driver
to the innermost projected part of the A/C head. (See Fig.
3-2-4a.)
(5) Rotate the roller driver so that the A/C head comes clos-
est to the capstan. From there, move the A/C head back
gradually toward the drum until the point where the FM
waveform is maximized for the second time, and then
tighten the screws (4) and (5) temporarily.
(6) Play an alignment tape (A2) and set to the manual-track-
ing mode.
(7) Fine-adjust A/C head base position to maximize the FM
waveform, and then tighten the screws (4) and (5) firmly.
(8) Play alignment tapes (A1) and (A2) and confirm that the
FM waveforms are maximized when the tracking is at the
center position.
Head base
Roller driver
To the capstan
To the drum
Toward the capstan
Toward the drum
Screw (5)
Screw (4)
A/C head
Fig. 3-2-4a
Fig. 3-2-4b
Alignment tape
[SP, stairstep]
played with the
SP head
Alignment tape
[EP(LP), stairstep]
played with the
EP(LP) head
Drum side Control head position Capstan side
X-value adjustment point
Maximum
Waveform output

3-5
3.3.2 Video circuit
3.3.2.1 EE Y/PB Y (S-VHS/VHS) level
(1) Record the signal (A2) in the mode (B1), and play back
the recorded signal.
(2) Set the VCR to the manual tracking mode.
(3) Set the VCR to the FWD slow (+1/6x) mode.
(4) Transmit the code (F) from the Jig RCU to adjust so that
the noise bar becomes the specified value (G) on the TV
monitor in the slow mode.
(5) Set the VCR to the Stop mode.
(6) Confirm that the noise bar is (G) on the TV monitor in
the slow mode.
(7) Repeat steps (3) to (6) in the REV slow (–1/6x) mode.
(8) Repeat steps (1) to (7) in the mode (B2).
Note:
• For FWD slow (+1/6x) playback, transmit the code “08”
from the Jig RCU to enter the slow playback mode, and
transmit the code “D0” for REV slow (–1/6x) mode.
Signal (A1) •Ext. S-input
(A2) •Ext. input
(A3) •Color (colour) bar signal [NTSC]
Mode (B1) •EE SP
(B2) •S-VHS SP
(B3) •VHS SP
Equipment (C) •Oscilloscope
Measuring point (D) • VIDEO OUT terminal (75Øterminated)
EVR mode (F1) •Jig code “57”
EVR address (F2) •A : 11
(F3) •Jig code “21” twice
(F4) •Jig code “18” or “19” (Channel +/-)
Specified value (G) •1.00 ± 0.05 Vp-p
Adjustment tool (H) •Jig RCU [PTU94023B]
Fig. 3-3-2-1a EE/PB Y level
(1) Input the signal (A3) from the input point (A1).
(2) Set the VCR to the mode (B1).
(3)
Observe the VIDEO OUT waveform at the measuring
point (D).
(4) Set the VCR to the EVR mode by transmitting the code
(F1) from the Jig RCU.
(5) Setthe EVR addressto(F2) by transmittingthecode (F3)
from the Jig RCU.
(6) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the VIDEO OUT waveform becomes the
specified value (G).
(7) Release the EVR mode of the VCR by transmitting the
code (F1) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(8) Input the signal (A3) from the input point (A2).
(9) Repeat steps (3) to (7) in the mode (B1).
(10)Record the signal (A3) in the mode (B2), and play back
the recorded signal.
(11)Set the VCR to the manual tracking mode.
(12)Repeat steps (3) to (7) in the mode (B2).
(13)Record the signal (A3) in the mode (B3), and play back
the recorded signal.
(14)Set the VCR to the manual tracking mode.
(15)Repeat steps (3) to (7) in the mode (B3).
H. rate
Y level

JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
www.jvcservice.com(US Only)
JVC CANADA INC.
Head office :
21 Finchdene Square Scarborough, Ontario M1X 1A7
[phone]
Printed in Japan
0303 VP