JVC HR-S6950EU User manual

SERVICE MANUAL
No.82923
June 2002
VIDEO CASSETTE RECORDER
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-S7950EU.)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
HR-S6950EU, HR-S6955MS,
HR-S7950EU, HR-S7955EK, HR-S7955MS
V15S1/S2/S15
GENERAL
Power requirement : AC 220 V – 240 Vd, 50 Hz/60 Hz
Power consumption
Power on : 18 W
Power off : 3.6 W
Temperature
Operating : 5°C to 40°C
Storage : –20°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD)
: 400 mm x 94 mm x 270 mm
Weight : 3.4 kg
Format : S-VHS/VHS PAL standard
Maximum recording time
(SP) : 240 min. with E-240 video cassette
(LP) : 480 min. with E-240 video cassette
(EP) : 720 min. with E-240 video cassette
VIDEO/AUDIO
Signal system : PAL-type colour signal and CCIR
monochrome signal, 625 lines
50 fields
Recording system : DA4 (Double Azimuth) head helical
scan system
Signal-to-noise ratio: 45 dB
Horizontal resolution
(SP/LP) : 250 lines (VHS)
400 lines (S-VHS)
(EP) : 220 lines (VHS)
350 lines (S-VHS)
Frequency range : 70 Hz to 10,000 Hz (Normal audio)
20 Hz to 20,000 Hz (Hi-Fi audio)
Input/Output : 21-pin SCART connectors:
IN/OUT x 1, IN/DECODER x 1
RCA connectors:
VIDEO IN x 1, AUDIO IN x 1,
AUDIO OUT x 1
S-Video connector:
IN x 1, OUT x 1
TUNER/TIMER
TV channel storage capacity
: 99 positions (+AUX position)
Tuning system : Frequency synthesized tuner
Channel coverage : VHF 47 MHz – 89 MHz/
104 MHz – 300 MHz/
302 MHz – 470 MHz
UHF 470 MHz – 862 MHz
Aerial output : UHF channels 22 – 69 (Adjustable)
Memory backup time
: Approx. 10 min.
ACCESSORIES
Provided accessories
: RF cable,
Infrared remote control unit,
“R6” battery x 2
Specifications shown are for SP mode unless otherwise
specified.
E.& O.E. Design and specifications subject to change without
notice.
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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
1.8 Sevicing items related to video navigation ..................................... 1-10
2. MECHANISM
2.1. Before disassembling/assembling .................................................. 2-1
2.1.1 Notes.......................................................................................... 2-1
2.1.2 Mechanism operation check ...................................................... 2-1
2.1.3 Setting the mechanism assembling mode ................................. 2-1
2.1.4 Layout of the main mechanism parts ......................................... 2-2
2.1.5 Disassembling procedure table.................................................. 2-3
2.2. Replacement of the main mechanism parts.................................... 2-4
2.2.1 Cassette holder .......................................................................... 2-4
2.2.2 A/C head .................................................................................... 2-5
2.2.3 Guide arm, pinch roller arm ....................................................... 2-6
2.2.4 Idler arm, idler gear 1/2 .............................................................. 2-6
2.2.5
Main brake(T), brake lever, tension arm,reel disk(S/T), Rec safety lever .................... 2-6
2.2.6
Press lever, control cam, capstan brake assembly,loading motor assembly .................... 2-7
2.2.7 Capstan motor, load gear, control plate ..................................... 2-8
2.2.8 Clutch unit assembly, direct gear ............................................... 2-9
2.3. Mechanism timing chart ................................................................ 2-10
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 theA/C head ................................................... 3-3
3.2.4 A/C head phase(X-value) ........................................................... 3-4
3.3 Electrical Adjustment........................................................................ 3-4
The following table lists the differing points between models HR-S6950EU, HR-S6955MS, HR-S7950EU, HR-S7955EK and
HR-S7955MS.
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
3.3.3 Audio circuit................................................................................ 3-5
3.3.3.1 Audio REC FM ...................................................................... 3-5
3.3.4 Syscon circuit(EU/EK MODEL) .................................................. 3-6
3.3.4.1 Timer clock ............................................................................ 3-6
3.3.5 PAL/SECAM converter circuit(MS MODEL)............................... 3-6
3.3.5.1 Colour difference level .......................................................... 3-6
3.3.5.2 SECAM burst position ........................................................... 3-6
4. CHARTS AND DIAGRAMS
4.1 BOARD INTERCONNECTIONS ...................................................... 4-3
4.2 MAIN(VIDEO/N.AUDIO) SCHEMATIC DIAGRAM........................... 4-5
4.3 MAIN(ON SCREEN) SCHEMATIC DIAGRAM ................................ 4-7
4.4
MAIN(SECAM) SCHEMATIC DIAGRAM [HR-S6950MS/S7955MS] ................. 4-8
4.5 MAIN(FMA) SCHEMATIC DIAGRAM .............................................. 4-9
4.6 MAIN(SYSCON) SCHEMATIC DIAGRAM..................................... 4-11
4.7 MAIN(SW.REG) SCHEMATIC DIAGRAM ..................................... 4-13
4.8 MAIN(TUNER) SCHEMATIC DIAGRAM ....................................... 4-15
4.9
MAIN(FRONT) ,MINI FRONT, S-JACK ANDADV.JOG SCHEMATIC DIAGRAM ... 4-17
4.10
MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM ......................... 4-19
4.11
2D DIGITAL SCHEMATIC DIAGRAM [HR-S6950EU/S6955MS/S7955MS] ................... 4-21
4.12
3D/TBC (2M) SCHEMATIC DIAGRAM [HR-S7950EU/S7955EK] .......................... 4-23
4.13
TERMINAL(S-SUB) SCHEMATIC DIAGRAM ................................. 4-25
4.14
TERMINAL(I/O) SCHEMATIC DIAGRAM......................................... 4-27
4.15
DEMODULATOR SCHEMATIC DIAGRAM ..................................... 4-29
4.16
S-P CONVERTER SCHEMATIC DIAGRAM [HR-S6955MS/S7955MS] ............... 4-31
4.17 MAIN CIRCUIT BOARD............................................................... 4-33
4.18 2D DIGITALAND 3D DIGITAL/2M CIRCUIT BOARDS ............... 4-36
4.19 DEMODULATOR CIRCUIT BOARD ............................................ 4-37
4.20
S-P CONVERTER CIRCUIT BOARD[HR-S6955MS/S7955MS] ............ 4-37
4.21
TERMINAL CIRCUIT BOARD ................................................................. 4-38
4.22
WAVEFORMS ......................................................................................... 4-39
4.23
VOLTAGE CHARTS ................................................................................ 4-41
4.24
REMOTE CONTROLLER SCHEMATIC DIAGRAM ........................ 4-43
4.25
FDP GRID ASSIGNMENTAND ANODE CONNECTION ..................... 4-43
4.26
CPU PIN FUNCTION ...................................................................... 4-44
4.27
SYSTEM CONTROL BLOCK DIAGRAM ........................................... 4-45
4.28
VIDEO BLOCK DIAGRAM ............................................................... 4-47
4.29
AUDIO BLOCK DIAGRAM ............................................................... 4-51
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY<M1> ............................ 5-1
5.2 FINALASSEMBLY<M2> .................................................................. 5-2
5.3 MECHANISM ASSEMBLY<M4> ...................................................... 5-4
5.4 ELECTRICAL PARTS LIST .............................................................. 5-6
MAIN BOARD ASSEMBLY<03> .......................................................... 5-6
2D D BOARD ASSEMBLY<05>[HR-S6950EU/S6955MS/S7955MS] .......... 5-14
3D D/2M BOARD ASSEMBLY<05>[HR-S7950EU/S7955EK] ....................... 5-15
TERMINAL BOARD ASSEMBLY<06> ............................................... 5-16
A/C HEAD BOARDASSEMBLY<12> ............................................................ 5-18
DEMOD BOARD ASSEMBLY<14> .................................................... 5-18
MINI FRONT BOARD ASSEMBLY<28> [HR-S7955MS] ...................... 5-18
S.JACK BOARD ASSEMBLY<36> .................................................... 5-18
ADV.JOG BOARD ASSEMBLY<38> .................................................. 5-18
LOADING MOTOR BOARD ASSEMBLY<55>................................... 5-19
S-P CONVERTER BOARD ASSEMBLY<87>[HR-S6955MS/S7955MS] ...... 5-19
MODEL HR-S6950EU
ITEM
POWER PLUG CEE 3PIN CEE
DIGITAL SLOW NOT USED USED NOT USED
RETAKE NOT USED USED
ZERO FRAME EDIT NOT USED USED
INSERT / AUDIO DUBBING NOT USED USED
MESECAM USED(MANUAL) USED(PB ONLY) USED(MANUAL) NOT USED USED(PB ONLY)
SECAM NOT USED USED NOT USED USED
TBC NOT USED USED NOT USED
REAR S OUT(4-pin) NOT USED USED
REMOTE PAUSE TERMINAL NOT USED USED
BROADCASTING STANDARD B/G, D/K L, B/G B/G, D/K I L, B/G
RF OUT USED NOT USED USED NOT USED
VPS USED NOT USED USED NOT USED
OSD LANGUAGE 13 LANGUAGES FRENCH 13 LANGUAGES ENGLISH FRENCH
x1.5 PLAYBACK with AUDIO NOT USED USED NOT USED
HR-S7950EUHR-S6955MS HR-S7955MSHR-S7955EK
Notes: Mark is same as left.
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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: Parts in this category also include those specified to 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
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
ode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
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) Remove the old connector by cutting the wires at a 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
metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.
1
v
Precautions 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
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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
Confirm specified dielectric strength or greater between power cord plug prongs and 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.
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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
cassette 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.
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1-2
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 3a>
• Whenreattachingthe Mechanism assembly,securethe screws
(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.
Fig. 1-2-2a
Fig. 1-2-2b
Door
opener
Side
frame(R) Switch
knob
Switch
lever
<Note 3c>
(S3c)
(S3c)
(S3e) (S3e)
(S3d)
(S3d)
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
<Note 3c>
• When reattaching the Drum assembly, secure the screws (S3c
to S3e) in the order of c, d, e.
• When handling the drum assembly alone, hold it by the motor
orshaft.Be careful nottotouchother parts, especiallythevideo
heads. Also take care not to damage the connectors.
Fig. 1-2-2c
Shaft
Video heads
Motor
Step/
LocNo.
Part Name Fig.
No. Point Note
1.2.2 Disassembly procedure
[1] Top cover 1-2-2d 4(S1a), (S1b)
[2] Front panel
1-2-2d [HR-S7955MS] < Note 2a >
assembly CN7005(WR2a) <
Note 2b >
[HR-S6950EU, S6950MS
HR-S7950EU, S7955EK]
CN7001(WR2a),
CN916(WR2b),
2(S2a), 4(L2a), 3(L2b)
[HR-S7955MS] CN7001(WR2c)
Mini front board assembly (L2c), (L2d),
PC Support
( ADV. Jog board assembly ) 2(S2b), Knob assembly
(Front S jack board assembly) 2(S2c)
[3] Mechanism
1-2-2d CN2001(WR3a), < Note 2a >
assembly (S3a), (S3b) <
Note 3a >
(Drum assembly) CN1(WR3b), <
Note 3b >
(S3c), (S3d), (S3e) <
Note 3c >
(Inertia plate) 4(L3b)
(Roller arm assembly) (S3g), (W3a), (P3a),
(L3c)
[4]
[HR-S6955MS, S7955MS] 1-2-2d CN511(WR4a)
S/P Converter board assembly 2(S4a), (L4a)
[5] Main board assembly 1-2-2d (S5a), 3(S5b), (L5a)
[6] Bottom cover
1-2-2d 3(L6a), 5(L6b), 2(L6c)
--------------------------
--------------------------
--------------------------------------------------------------------------
--------------------------------------------------------------------------
--------------------------------------------------------------------------
--------------------------
--------------------------
--------------------------
<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.
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1-3
Fig. 1-2-2d
A
CN1601
The excessive length portion
of wire should be reat as figure.
DRUM
A/C HEAD
CN916
CN2001
Make a crease
CN511
Make a crease
FRONT PANEL
CN7001
B
Make a crease
P/S CONV PWB
Make a crease
DETAIL "A"
About 5cm
CN7001
Push the FFC wire from the FRONT PANEL
to rear side.
CN7002
CN7005
DETAIL "B"
CN5001
(WR2b)
<Note 2a>
To Front S Jack board assembly To Adv. Jog board assembly (WR2a)
<Note 2a>
(WR2c)
(WR2a)
d
a
Q3003
b
Q3002
JS3001
c'
D3001
b
CN5001
d'
b
c'
"Z"
h
f
k
e
af
c
c
b
f
f
c'
c'
d'
hb
b
e
<Note 2b>
<Note 2b>
[2] Front panel
assembly
PC Support
[2]Mini front board
assembly
[5]Main board
assembly
Knob assembly
Cassette door
(L2a)
(L2d)
(L2c)
(L2a)
(L2b)
(L2b)
a
d
<Note 3c>
d
g
e
Inertia plate
Roller arm assembly
<Note 3e>
[3] Mechanism assembly
Drum assembly
<Note 3c>
<Note 3c>
<Note 3b>
<Note 3a>
<Note 3a>
<Note 2a>
(WR3a)
(S3c) (S3e)
(S3d)
(S2a)
(S3a)
(S2a)
(S3b)
(L3b)
(P3a)
(S3g)
(W3a)
(L3c)
g
NOTE) After attached ROLLER ARM ASS'Y,
tighten screw(S3g) with slit washer(W3a).
NOTE) When attaching ROLLER ARM ASS'Y,
attach the hook(L3c) before the spring(P3a).
NOTE) INERTIA PLATE should be attached so as to ser small
diameter of central round hole above.
(S4a)
(S4a)
[4] S/P conveter board
assembly
(L4a)
h
k
h
<Note 2a>
<Note 2a>
<Note 2a>
(WR3b)
right side
right side
back side back side
JS3001
Accord the position of V gap on R. Encoder and PWB silk " ".
<Phase alignment>
Accord the position of Boss on R. Encoder 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 the Mehcanism assembly.
(S5a)
(S5b)
(S5b)
(S5b)
Insert the bushing of POWER CORD
so as not to twist the cord.
(WR4a)
(WR3a)
NOTE)INSERT FFC WIRE TO THE CONNECTOR
BEFORE ATTACHING JOG/SW PWB TO F.PANEL.
NOTE) INSERT FFC WIRE TO THE CONNECTOR BEFORE
CN7003
ATTACHING JOG/SW PWB TO F.PANEL.
CN7108
Front panel assembly back side
Front S Jack board assembly
(S2b)
(WR2a)
<Note 2a>
(WR2b)
<Note 2a>
(S2c)
Back side
ADV. Jog board
assembly
Switch lever
<Note 2b>
NOTE) WHEN YOU FIX FRONT S Jack PWB WITH THE SCREW.
PUT JIG UNDER FRONT PANEL ASS'Y.
Right side Back side
OK NG
CN
electrode side supporting side
Except U/U(C)/JPN
NOTE
CN CN
1. Insert direction of FFC WIRE as follows.
2. FFC WIRE and DRUM FPC WIRE should
be insert as follows.
3. Insert direction of POWER CORD.
NEUTRAL
WHITE LINE
CN5001
BLUE
NEUTRAL
CN5001
U/U(C)/JPN
90°
[1] Top cover
(S1a)
(S1a)
REAR SIDE (S1b)
f
f
f
f
[6] Bottom cover
(L6b)
(L6a)
(L6a)
(L6a)
(L6b)
(L6c)
ONLY USED
FOR HR-S7955MS
ONLY USED FOR
HR-S6955MS,
HR-S7955MS
ONLY USED
FOR HR-S7955MS
(L5a)
Switch knob
<Note 2b>
www.freeservicemanuals.info
3/28/2017
Digitized in Heiloo Netherland

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).
www.freeservicemanuals.info
3/28/2017
Digitized in Heiloo Netherland