JVC DR-MX10SE User manual

SERVICE MANUAL
COPYRIGHT © 2006 VICTOR COMPANY OF JAPAN, LIMITED No.YD084
2006/1
VHS & HDD & DVD VIDEO RECORDER
YD08420061
DR-MX10SE, DR-MX10SEF,
DR-MX10SEK
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
DR-MX10SE, DR-MX10SEF, DR-MX10SEK [D5VC21]
(EK model)
(E model)
(EF model)
TM
Area Suffix
E ------- Continental Europe
Northern Europe
EF --------------------- France
EK ------------------------ U.K.
*Since the whole mechanism assembly unit is replaced, the DVD recordermechanism of this unit need not be adjusted.
*For disassembling and assembling of VHS MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700
(MECHANISM ASSEMBLY).

1-2 (No.YD084)
SPECIFICATION
• Specifications shown are for SP mode unless otherwise specified.
• E.& O.E. Design and specifications subject to change without notice.
• Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories.
• "DTS" and "DTS DIGITAL OUT" are trademarks of Digital Theater Systems, Inc.
• This product incorporates copyright protection technology that is protected by U.S. patents and other intellectual property rights. Use of this copyright pro-
tection technology must be authorized by Macrovision. Reverse engineering or disassembly is prohibited.
• GUIDE Plus+, SHOWVIEW,VIDEO Plus+, G-LINK are (1) registered trademarks or trademarks of, (2) manufactured under license from and (3) subject of
various international patents and patent applications owned by, or licensed to, Gemstar-TV Guide International, Inc. and/or its related affiliates.
• GEMSTAR-TV GUIDE INTERNATIONAL, INC. AND/OR ITS RELATED AFFILIATES ARE NOT IN ANY WAY LIABLE FOR THE ACCURACY OF THE
PROGRAM SCHEDULE INFORMATION PROVIDED BY THE GUIDE PLUS+ SYSTEM. IN NO EVENT SHALL GEMSTAR-TV GUIDE INTERNATIONAL,
INC. AND /OR ITS RELATED AFFILIATES BE LIABLE FOR ANY AMOUNTS REPRESENTING LOSS OF PROFITS, LOSS OF BUSINESS, OR INDI-
RECT, SPECIAL, OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE PROVISION OR USE OF ANY INFORMATION, EQUIPMENT, OR
SERVICES RELATING TO THE GUIDE PLUS+ SYSTEM.
• i-LINK is a trademark of Sony Corp.
DR-MX10SEK DR-MX10SE DR-MX10SEF
GENERAL
Power requirement AC 220 V - 240 V, 50 Hz / 60 Hz
Power consumption
Power on 45 W
Power off 6.7 W
Temperature
Operating 5°C to 35°C
Storage -20°C to 60°C
Operating position Horizontal only
Dimensions (W ×H ×D) 435 mm ×96 mm ×384 mm
Weight 6.9 kg
VIDEO/AUDIO (DVD Deck)
Recordable disc DVD-RAM 12 cm (4.7 GB/9.4 GB*1), DVD-RAM 8 cm (1.4 GB/2.8 GB*2), DVD-R 12 cm (4.7 GB)
DVD-R 8 cm (1.4 GB), DVD-RW 12 cm (4.7 GB), DVD-RW 8 cm (1.4 GB)
*1 9.4 GB double-sided discs *2 2.8 GB double-sided discs
Recording format DVD-RAM : DVD Video Recording format
DVD-R : DVD Video format, DVD Video Recording format
DVD-RW : DVD Video format, DVD Video Recording format
Recording time Maximum 8 hours (with 4.7 GB disc)
(XP): Approx. 1 hour, (SP): Approx. 2 hours, (LP): Approx. 4 hours
(EP): Approx. 6 hours, (FR): Approx. 1 hour - 8 hours
Audio recording system Dolby Digital (2 ch), Linear PCM (XP mode only)
Video recording compression system MPEG2 (CBR/VBR)
VIDEO/AUDIO (HDD Deck)
Capacity 160 GB
Recording time (DV) : Approx. 11 hours, (XP) : Approx. 34 hours, (SP) : Approx. 69 hours
(LP) : Approx. 138 hours, (EP) : Approx. 209 hours, (FR480) : Approx. 300 hours
Audio recording system Dolby Digital (2 ch), Linear PCM (XP mode only)
Video recording compression system MPEG2 (VBR)
VIDEO/AUDIO (VHS Deck)
Signal system PAL colour signal and CCIR monochrome signal, 625 lines / 50 fields
Recording system DA4 (Double Azimuth) head helical scan system
Format VHS PAL standard
Maximum recording time
(SP) 240 min. with E-240 video cassette
(LP) 480 min. with E-240 video cassette
Signal-to-noise ratio 45 dB
Horizontal resolution 230 lines
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 ×1, IN / DECODER ×1
S-video input Y: 1.0 Vp-p, 75 Ω, C: 0.3 Vp-p, 75 Ω
Video input 1.0 Vp-p, 75 Ω(pin jack)
Audio input 2 Vrms (pin jack)
i.Link 4-pin for DV Input/Output
Component video output Y: 1.0 Vp-p, 75 Ω, Pb/Pr: 0.7 Vp-p, 75 Ω Corresponding to copy protection
Digital audio output Coaxial
Corresponding to Dolby Digital and DTS Digital Surround,
Bit stream Selectable in digital audio output setting menu
G-LINK Ø3.5 mm jack
TUNER/TIMER
Tuning system Frequency synthesized tuner
Signal system PAL colour signal, 625 lines/50 fields PAL/SECAM colour signal, 625 lines/50 field
TV channel storage capacity 99 positions (+AUX position)
Channel coverage (PAL B/G)
VHF : 44.5 MHz - 143 MHz/143 MHz - 470
MHz
UHF : 470 MHz - 862 MHz
VHF : 47 MHz - 89 MHz/104 MHz - 300
MHz/302 MHz - 470 MHz
UHF : 470 MHz - 862 MHz
VHF(LOW) : 47MHz-89MHz(E2-E4,X,Y,Z)
VHF(HIGH) : 104MHz-300MHz(E5 - E12,
S1-S20, M1 - M10, U1 - U10)
Hyper: 302MHz - 470MHz (S21-S41)
UHF: 470MHz - 862MHz (E21 - E69)
Channel coverage(SECAM-L)
-
VHF(LOW) : 49MHz - 65MHz (2-4)
VHF(HIGH) : 104MHz-300 MHz(5-10,CATV)
Hyper : 300MHz - 470MHz (CATV)
UHF : 470MHz - 862MHz (21 - 69)
Clock reference Quartz
Memory backup time Approx. 10 minutes

(No.YD084)1-3
SECTION 1
PRECAUTION
1.1 SAFTY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictly in-
spected to conform with the recognized product safety and elec-
trical 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.
1.1.1 Precautions during Servicing
(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
comply 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
comply with X-ray emission standards for products
using cathode ray tubes and those specified for
compliance with various regulations regarding spu-
rious radiation emission.
(3) Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as speci-
fied.
(4) Use specified internal wiring. Note especially:
• Wires covered with PVC tubing
• Double insulated wires
• High voltage leads
(5) Use specified insulating materials for hazardous live parts.
Note especially:
• Insulation Tape
• PVC tubing
•Spacers
• Insulation sheets for transistors
•Barrier
(6) When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Fig.1-1-1
(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.
Fig.1-1-2
(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 volt-
age circuits, and related circuits are specified for compli-
ance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the
cathode ray tubes and other parts with only the specified
parts. Under no circumstances attempt to modify these cir-
cuits.Unauthorized modification can increase the high volt-
age value and cause X-ray emission from the cathode ray
tube.
(12) Crimp type wire connectorIn such cases as when replacing
the power transformer in sets where the connections be-
tween the power cord and power trans former primary lead
wires are performed using crimp type connectors, if replac-
ing the connectors is unavoidable, in order to prevent safe-
ty hazards, perform carefully and precisely according to the
following steps.
•Connector part number :E03830-001
•Required tool : Connector crimping tool of the proper
type which will not damage insulated parts.
•Replacement procedure
a) Remove the old connector by cutting the wires at a
point close to the connector.Important : Do not re-
use a connector (discard it).
Fig.1-1-3
b) 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.
Fig.1-1-4
c) Align the lengths of the wires to be connected. In-
sert the wires fully into the connector.
Fig.1-1-5
d) As shown in Fig.1-1-6, 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.
Fig.1-1-6
e) Check the four points noted in Fig.1-1-7.
Fig.1-1-7
Power cord
cut close to connector
15 mm
Connector
Metal sleeve
1.25
2.0
5.5
Crimping tool
Not easily pulled free Crimped at approx. cente
r
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm

1-4 (No.YD084)
1.1.2 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 be-
tween power cord plug prongs and externally exposed
parts of the set (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks, ear-
phone 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 Fig.1-1-11 below.
(3) Clearance distance
When replacing primary circuit components, confirm spec-
ified clearance distance (d), (d') between soldered termi-
nals, and between terminals and surrounding metallic
parts. See Fig.1-1-11 below.
Fig.1-1-8
(4) Leakage current test
Confirm specified or lower leakage current between earth
ground/power cord plug prongs and externally exposed ac-
cessible parts (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks, ear-
phone jacks, etc.).
Measuring Method : (Power ON)Insert load Z between
earth ground/power cord plug prongs and externally ex-
posed accessible parts. Use an AC voltmeter to measure
across both terminals of load Z. See Fig.1-1-9 and follow-
ing Fig.1-1-12.
Fig.1-1-9
(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 Fig.1-1-10 and grounding
specifications.
Fig.1-1-10
Fig.1-1-11
Fig.1-1-12
NOTE :
These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
Chassis
Power cord
primary wire
d'
d
ab
c
V
A
Externally
exposed
accessible part
Z
Exposed accessible part
Grounding Specifications
AC inlet
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z 0.1 ohm
Z 0.5 ohm
Earth pin
MIlli ohm meter
AC Line Voltage Region
Japan
Europe & Australia
R 1 M /500 V DC
USA & Canada 1 M R 12 M /500 V DC
R 10 M /500 V DC
Insulation Resistance (R)Dielectric Strength Clearance Distance (d), (d')
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
AC 1 kV 1 minute
AC 1.5 kV 1 minute
AC 1 kV 1 minute
(Class )
(Class )
AC 3 kV 1 minute
AC 1.5 kV 1 minute
d, d' 3 mm
d, d' 4 mm
d, d' 3.2 mm
d' 8 m m (Power cord)
d' 6 m m (Primary wire)
d 4 m m
AC Line Voltage Region
Japan
Europe & Australia
USA & Canada
Load Z Leakage Current (i) a, b, c
100 V
110 to 130 V
110 to 130 V
220 to 240 V
i 1 mA rms
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
1
1.5
2
50
0.15

(No.YD084)1-5
1.2 Hard Disk Drive (HDD) Handling Precautions
The HDD is a precision device for use in reading and writing a large amount of data on or from a disk rotating at a high speed. If it is
not handled carefully, either abnormal operation may result or it may not be possible to read data. The HDD is sensitive to the following
items and special care is required in safeguarding against them when handling an HDD. Also take care in handling a set incorporating
an HDD.
(1) Vibrations and impacts
(2) Static electricity
(3) Rough handling
1.2.1 Handling in transport, etc.
• Be sure to place the HDD in the manufacturer's specified pack-
age carton before transport.
• When receiving a package containing an HDD, check that the
package carton is not damaged (such as having holes in the
carton, crushed corners, etc.).
• Do not impact the packaging carton when loading or unloading
it.
• It is not permitted to use the inner package carton only for
transporting an HDD.
• Do not stack package cartons one upon another.
1.2.2 Handling an HDD in the stand-alone status
• When handling an HDD on a hard workbench, place an anti-
static mat (rubber sheet) or similar object on the hard surface
(to prevent any impacts occurring between the HDD and
bench).
• Do not stack the HDDs one upon another.
• Do not knock an HDD with a hard object (such as a screwdriv-
er).
• Do not place an HDD on its side panel without using a support
(do not place an HDD in an unstable position).
1.2.3 Handling the installation of an HDD
• Place antistatic mats or similar sheets on all of the surfaces on which work is conducted or when the HDD is transported.
• Do not permit the HDD to knock against the set's brackets.
• When screwing the brackets, be careful not to knock the HDD. When using a power screwdriver, use a low-shock model and arrange
the tightening torque properly.
• When mounting an HDD in a main body, take care not to apply excessive force to the brackets.
HDD
Do not throw or
drop packages.
Be sure to package and
transport the HDDs correctly.

1-6 (No.YD084)
1.3 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.3.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players or recorder.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.4 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long
a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap

(No.YD084)1-7
1.5 Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABEL
On mechaism assembly
The photograph might be
different from the actual thing.

1-8 (No.YD084)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 Different table of features
The following table indicates main different points between models DR-MX10SEK, DR-MX10SE and DR-MX10SEF.
Note:
Mark ←as same as left.
2.2 Service position
This unit has been designed so that the Mechanism and Main
board assemblies can be removed together from the bottom
chassis. Before diagnosing or servicing the circuit boards, take
out the major parts from the bottom chassis.
2.2.1 How to set the "Service position"
(1) Refer to the disassembly procedure and perform the disas-
sembly of the major parts before removing the Mechanism
assembly.
(2) Remove the screws that fix the Mechanism, Main board as-
sembly to the bottom chassis. If any other screws are used
to fix the boards, remove them also.
(3) Remove the combined Mechanism, HDD, DVD unit,
switching regulator, digital, junction and Main board as-
semblies.
(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. 2-2a.)
(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
assembly.
•For the disassembly procedure of the major parts and
details of the precautions to be taken, see "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 assem-
blies. If they are improperly grounded, there may be
noise on the playback picture or FDP counter display
may move even when the mechanism is kept in an inop-
erative status.
•In order to diagnose the playback or recording of the
cassette tape, set the Mechanism assembly to the re-
quired mode before placing it upside down. If the mech-
anism mode is changed (including ejection) while it is in
an upside down position the tape inside may be dam-
aged.
•For some models, the mechanism and board assem-
blies are attached by connectors only. When carrying
out a diagnosis or repair of the boards in the "Service
position", make sure that the connectors are not dis-
connected.
Fig.2-2a
ITEM DR-MX10SEK DR-MX10SE DR-MX10SEF
POWER PLUG 3PIN CEE ←
VHS PAL VHS PAL/MESECAM VHS PAL/MESECAM/SECAM VHS
BROADCASTING STANDARD I B/G, D/K L, L', B/G
STEREO DECODER NICAM NICAM/A2 NICAM/A2
VCR PLUS+ - - -
EPG GUIDE PLUS+ ←←
VPS/PDC X/O O/O X/O
TP111 D.FF
TP106 PB FM
TP2253 A.PB FM
TP4001 CTL.P
HDD
DVD WPKV
Main board assy
Switchcing regulator
board assy
Switch display board assy Operation jack board assy
Jack board
assy
Digital board
assy
Junction board
assy

(No.YD084)1-9
2.3 Jig RCU mode
This unit uses the following two modes for receiving remote con-
trol codes.
(1) User RCU mode:Ordinary mode for use by the user.
(2) Jig RCU mode: Mode for use in production and servicing.
When using the Jig RCU, it is required to set the unit 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 EE-
PROM, it is required to set the unit back to the User RCU mode
each time that an adjustment is made or to check that the neces-
sary operations have been completed.These modes can be set
by the operations described below.
Note:
•When the unit is set to Jig RCU mode and when the unit
is under Jig RCU mode, the remote control unit attached
to product operates only in "Remote Control Code 1".
Since the unit is in "Remote Control Code 3" when it is
shipped and just after its batteries are changed, "Re-
mote Control Code 3" needs to be changed to "Remote
Control Code 1."
•Confirm the RCU mode when exchanged parts. Since
some SERVICE PARTS sets the unit to the Jig RCU
mode as initial setting. Therefore please set the unit to
the user RCU mode after replacing the EEPROM.
Fig.2-3a User/Jig RCU mode
2.3.1 Changing Remote Control Code
(1) Slide the TV/CABLE/SAT/DVD switch to DVD.
(2) Press the numeric button "1" of the remote control unit
while pressing the "SET UP" button of the remote control
unit. Then,press the "ENTER" button, and then release the
"SET UP" button.
(3) Press the "POWER" button on the unit to turn off the unit.
(4) Press the "PLAY" button on the unit for over 5 seconds
while the unit is turned off. The code currently set appears
on the front display panel.
(5) Press the "STOP" button on the remote control to change
the unit’s code. When FDP indicator displays "DVD1," it
means that the Remote Control Code has been changed to
"1."
2.3.2 Setting the Jig RCU mode
(1) Turn on the power.
(2) Press the "VHS/HDD/DVD SELECT" button repeatedly on
the unit so that the VHS lamp lights up on the unit.
(3) Press the following remocon keys continuously within 2
seconds " SET UP " →" 2 " →" 8 " →" ENTER ".
When the unit is set to the Jig RCU mode, the symbols
( " : " ) in the time display of the FDP are blinked.
(Refer to Fig.2-3a User/Jig RCU mode)
2.3.3 Setting the User RCU mode
(1) Turn off the power.
(2) Press the "REC" and "PAUSE" buttons of the VCR simul-
taneously. Alternatively, transmit the code "43-9D" from the
Jig RCU.
2.4 Mechanism service mode
This model has a unique function to enter the mechanism into ev-
ery operation mode without loading of any cassette tape. This
function is called the "Mechanism service mode".
2.4.1 How to set the "Mechanism service mode"
(1) Set the unit to the Jig RCU mode (the mode in which codes
from the Jig RCU can be received)
(2) Transmit the code "43-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
completed, the mechanism enters the desired mode.
When the unit is set to the Mechanism service mode, the
symbols ("TIMER") in the FDP (LED) are blinked.
2.4.2 How to exit from the "Mechanism service mode"
(1) Unplug the power cord plug from the power outlet.
2.5 Maintenance and inspection
2.5.1 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 serviced.
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 cot-
ton swab soaked with alcohol.
(3) After cleaning, make sure that the cleaned parts are com-
pletely dry before using the cassette tape.
Fig.2-5a
2.5.2 Lubrication
With no need for periodical lubrication, you have only to lubricate
new parts after replacement. If any oil or grease on contact 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.
( blinked)
Jig RCU mode
User RCU mode
Video heads
A/C head

1-10 (No.YD084)
2.5.3 Suggested servicing schedule for main components
The following table indicates the suggested period for such ser-
vice measures as cleaning, lubrication and replacement. In prac-
tice, the indicated periods will vary widely according to
environmental and usage conditions. However, the indicated
components should be inspected when a set is brought for ser-
vice and the maintenance work performed if necessary. Also
note that rubber parts may deform in time, even if the set is not
used.
C : Cleaning
X : Inspection or Replacement if necessary
System Parts name Operation hours
1000H 2000H
Tape
transport
Drum assembly C,X X
A/C head C,X C,X
Pinch roller arm assembly C C
Full erase head C C
Tension arm assembly C C
Capstan motor (Shaft) C C
Guide arm assembly C C
Drive
Capstan motor X
Capstan brake assembly X
Main brake assembly X
Belt (Capstan) X X
Loading motor X
Clutch unit X
Worm gear X
Control plate X
Other Rotary encoder X

(No.YD084)1-11
SECTION 3
DISASSEMBLY
3.1 Removing the major parts
3.1.1 Destination of connectors
Destination of connectors
3.1.2 How to read the procedure table
This table shows the steps for disassembly of the externally fur-
nished parts and board assemblies. Reverse these steps when
re-assembling them.
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse or-
der.
These numbers are also used as the identification (loca-
tion) 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:
•The bracketed ( ) WR of the connector symbol are
assigned nos. in priority order and do not corre-
spond to those on the spare parts list.
(5) Adjustment information for installation
3.1.3 Disassembly procedure
< 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.
WR2a
WR2b
Main CN101
Main CN103
40
10
CONN. No. PIN No.CONNECTOR
Two kinds of double-arrows in connection tables respectively
show kinds of connector/wires.
: The connector of the side to remove
: Wire: Flat wire : Board to board (B-B)
Digital CN761
Digital CN762
CONN. No. PIN No.CONNECTOR
WR2a
WR2b
WR3a
WR3b
WR4a
WR4b
WR5a
CN7108
(CN1101)
CN7109
(CN1102)
CN4104
(CN1801)
WR7a
WR7b
WR7c
WR7d
WR7e
WR7f
WR8a
WR8b
WR8c
WR8d
Main
Main
Main
Drum
assembly
DVD unit
DVD unit
HDD
Junction
Junction
Jack
Junction
Main
Main
Junction
SW. REG.
Digital
SW. REG.
SW. REG.
Junction
SW. REG.
CN7112
CN3102
CN2001
CN7108
CN7109
CN4104
CN7104
CN3103
CN2601
CN7107
CN5304
CN1103
CN5301
CN5302
CN5504
CN5303
Operation/jack
Switch/display
A/C head
Main
Digital
SW. REG.
Digital
Digital
Digital
Digital
Video switch
Junction
Junction
Main
Junction
Junction
Main
Fan motor
HDD
DVD unit
CN7201
CN7001
CN1
CN2201
CN5303
CN2101
CN1101
CN1102
CN1801
CN501
CN7102
CN8001
CN7111
CN5501
CN7110
CN5311
9
15
6
7
40
4
40
15
15
9
4
19
11
13
19
19
15
2
4
4
(1) (2) (3) (4) (5)
Step/
Loc No.
Part Name Fig.
No. Point Note
[1] Top cover 3-1a 4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),
Bracket 2(S1c)
----------------------------------------
Step/
Loc No.
Part Name No.
Fig. Point Note
Top cover
Front panel assembly
(Operation/jack board assembly)
(Switch/display board assembly)
Mechanism assembly
(Drum assembly)
DVD unit
(Bracket)
Digital board assembly
and Jack board assembly
Junction board assembly
Switching Regulator
board assembly
Rear cover
HDD(Bracket, sheet)
Main board assembly
3-1e
3-1a
3-1d
3-1e
3-1b
3-1c
3-1d
3-1e
3-1e
3-1d
3-1d
3-1e
3-1d
3-1e
3-1d
3-1e
3-1e
3-1e
3-1e
8(S1a)
3(L2a),5(L2b)
CN7112(WR2a)
CN3102(WR2b)
CN2001(WR3a)
3(S3a),(S3b)
CN1(WR3b)
(S3c),(S3d),(S3e)
4(S4a),4(S4b)
(WR4a),(WR4b)
4(S5a),CN2101(WR5a)(S5b)
CN7108(CN1101),CN7109(CN1102)
(S7a),CN7104(WR7a),
CN3103(WR7b),CN2601
(WR7c),CN7104(WR7d),
CN5304(WR7e),CN5504(WR8c)
4(S8a)
CN5301(WR8a),
CN5302(WR8b),
CN5303(WR8c),
CN5304(WR7e)
(S9a),7(S9b),2(S9c),3(L9a)
4(S10a),4(S10b)
3(S11a)
<Note2a>
<Note2b>
<Note2a>
<Note3a>
<Note3b>
<Note2a>
<Note2a>
<Note2a>
<Note2a>
[1]
[2]
[3]
[4]
[5]
[7]
[8]
[9]
[10]
[11]

1-12 (No.YD084)
< Note 2b >
• When reattaching the Front panel assembly, make sure that
the door opener of the Side frame (R) is lowered in position pri-
or to the reinstallation.
• When reattaching the Front panel assembly, pay careful attention
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.
Fig.3-1a
< Note 3a >
• When reattaching the Mechanism assembly, secure the
screws (S3a to S3b) in the order of 1,2,3.
< 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 “MECHANISM ASSEMBLY
SERVICE MANUAL (No. 86700)”.]
• 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 (S3c
to S3e) in the order of c, d, e.
Fig.3-1b
• When handling the drum assembly alone, hold it by the motor
or shaft. Be careful not to touch other parts, especially the vid-
eo heads. Also take care not to damage the connectors.
Fig.3-1c
Fig.3-1d
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
Shaft
Video heads
Motor
BOTTOM SIDE
DISPLAY/SWITCH BOARD ASSY<28>
TOP SIDE
CN7201
CN7202
FW7001
06 08 07
11
52
1
34 876
10
9
12
05
CN7001
OPERATON JACK BOARD ASSY<27>
(WR2a) <Note 2a>
(WR3b)
<Note 2a> (WR3a)
<Note 2a>
(WR5a)
<Note 2a>
(WR7e)
<Note 2a>
(WR8a)
<Note 2a>
(WR7d)
<Note 2a>
(WR7a)
<Note 2a>
(WR8c)
(WR7f)
<Note 2a>
(WR4a)
<Note 2a>
(WR7b)
(WR7c)
(WR4b)
(WR2b) <Note 2a>
After Assembling
FRONT PANEL
CN7112
CN7201
CN7112
CN3102
CN3103
CN2601
CN7102
CN8001
CN5311
CN2001
CN7111
CN501
CN5301
CN5501
CN7107
CN7104
CN5304
CN5303
CN5302
CN5001
CN2101
CN7110 CN7109 CN7108
CN1103
CN1102 CN1101
CN1801
CN4104
CN5504
DV JACK BOARD ASSY
A/C HEAD
DRIVE
UNIT
MAIN BOARD ASSY
SWITCHING REGULATOR
BOARD ASSY
JUNCTION BOARD ASSY
(WR8b)
DIGITAL BOARD
ASSY
D
FAN
(OPE JACK CN7201)
from FRONT PANEL
J7201
OPERATON JACK BOARD ASSY parts surface
DISPLAY/SWITCH
BOARD ASSY
Soldering side
NOTE)WHEN YOU FIX ANY PWB WITH THE SCREW,
PUT IT ON THE JIGS.
NOTE)INSERT FFC WIRE TO THE CONNECTOR
BEFORE ATTACHING TO FRONT PANEL.
CN2201

(No.YD084)1-13
Fig.3-1e
d
i
i
i
a
c
c
c
e
e
e
a
e
b
b
b
b
e
duu
j
j
h
g
1
2
3
d
d
e
e
e
e'
e
e'
e
e'
e'
e'
e'
e'
e'
a
a
a
gh
j
c
r
r
c
CN5302
2
4
3
1
t
r
r
r
r
CN5001
c
c
r
r
[8] Switching regulator
board assembly
[10] HDD
[10] Sheet
[10] Bracket
[4] DVD Unit
[4] Bracket
[5] Digital board
assembly
[7] Junction board
assembly
[2] Front panel assembly
<Note 2b>
[11] Main board
assembly
[3] VHS Mechanism
assembly
b
b
b
b
A
t
j
j
j
(L2b)
(L2b)
(L2b)
(L2a)
(L2a)
[1] Top cover
[9] Rear cover
(S1a)
(S1a)
(S9a) (S9b)
(L9a)
(L9a)
(L9a)
(S9b)
(S9c)
(S1a)
(S1a)
(S1a)
(S8a)
(S8a)
(S10a)
(S10b)
(S10b)
(S10b)
(S10b)
(S10a)
(S10a)
(S4a)
(S4a)
(S11a)
(S11a)
(S3c) <Note 3b>
(S3a) <Note 3a>
(S3a)
<Note 3a>
(S3b) <Note 3a>
(S3e) <Note 3b>
(S3d) <Note 3b>
(S11a)
(S4a)
(S4a)
(S4b)
(S5b)
(S5a)
(S5a)
(S5a)
(S7a)
(S4b)
(S10a)
(S8a)
[3] Drum
assembly
s
s
s
f
JS3001
a
CN7113CN7114
CN914
CN7115
CN915
CN913
a
J905 J907
t
f
2. FFC WIRE and DRUM FPC WIRE
should be insert as follows.
1. Insert direction of FFC WIRE as follows.
3. Insert direction of POWER CORD.
NEUTRAL
CN5001
US/UC/JPN
WHITE LINE
CN5001
NEUTRAL
BLUE
except US/UC/JPN
CN
90
OK
CN CN
NG
electrode side
right side
supporting side
back side
NOTE
JS3001
<Phase alignment>
.Accord the position of V gap
R.ENCORDER and PWB silk
.Accord the position of Boss
on R.ENCORDER and PWB silk

1-14 (No.YD084)
SECTION 4
ADJUSTMENT
4.1 Before adjustment
4.1.1 Precaution
•The adjustments of this unit include the mechanism com-
patibility and electrical adjustments. During the perfor-
mance of this work, be sure to observe the precautions 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.
4.1.2 Required test equipments
• Color (colour) television or monitor
• Oscilloscope: wide-band, dual-trace, triggered delayed sweep
• Signal generator: RF / IF sweep / marker
• Signal generator: stairstep, color (colour) bar [PAL]
• Recording tape
• Digit-key remote controller(provided)
4.1.3 Required adjustment tools
z: Used --- : Not used
4.1.4 Color (colour) bar signal,Color (colour) bar pattern
4.1.5 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 unit to the Jig
RCU mode (the mode in which codes from the Jig RCU can be
received). (See "section 2 SPECIFIC SERVICE INSTRUC-
TIONS".)
Fig.4-1a Jig RCU [PTU94023B]
• Set the switches as shown below unless otherwise specified
on the relevant adjustment chart. The switches that are not list-
ed below can be set as desired.
If the VCR is not equipped with the functions detailed below,
setup is not required.
4.1.6 Manual tracking mode (Auto tracking ON/OFF) set-
ting
(1) In order to set to the manual tracking mode during tape
playback, press the “CHANNEL +/-”button on the unit si-
multaneously.
• When the manual tracking mode is set, the tracking is
placed at the center position.
(2) Press “CHANNEL +/-” to adjust the tracking manually.
4.1.7 EVR Adjustment
Some of the electrical adjustments require the adjustment per-
formed by the EVR system. The main unit have EEPROMs for
storing 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 fol-
lows.
Mechanism
compatibility
adjustment
Electrical
adjustment
Roller driver z---
Jig RCU --- z
Back tension cassette gauge z---
Alignment tape(MHPE) z---
Alignment tape(MHPE-L) zz
Roller driver
PTU94002
Back tension cassette gauge
PUJ48076-2
Jig RCU
PTU94023B
Alignment tape
(SP, stairstep, PAL)
MHPE
Alignment tape
(LP, stairstep, PAL)
MHPE-L
(75%)
White(75%)
0.7 V
0.3 V
Horizontal sync
VU
1V
White(100%)
Yellow Cyan
Green
Magenta
Red
Blue
Burst
0.3 V
V(R-Y)
U(B-Y)
White
Yellow
Cyan
Green
Magenta
Red
Blue
U Black
White
100%
V
Colour bar signal [PAL] Colour bar pattern [PAL]
AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.
OFF
PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL
VIDEO STABILIZER OFF
TBC ON
Digital 3R ON
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK OFF
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the " "( 3 ) button
after the data code is set.
Jig RCU

(No.YD084)1-15
•As the counter indication and remaining tape indication
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.
Fig.4-1b EVR mode
4.2 Mechanism compatibility adjustment (VHS SECTION)
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 re-
placed the A/C head, drum assembly or any part of the
tape transport system.
•To prevent damaging the alignment tape in the compat-
ibility adjustment, prepare a cassette tape (for self-re-
cording/playback), 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.4-2b.)
4.2.1 Tension pole position
Notes:
•This adjustment must be performed every time the ten-
sion 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.4-2a.)
a) Remove the top frame, cassette holder and side
frames (L/R) all together. (Refer to the SERVICE
MANUAL No.86700 [MECHANISM ASSEMBLY].)
b) 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).
c) Adjust by turning the adjustment pin so that the tip of
the tension arm is aligned with the stamping (b) on
the main deck.
d) 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.
Fig.4-2a
4.2.2 FM waveform linearity
(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. 4-2c.)
(5) Reduce the V.PB FM waveform by the tracking operation.
If a drop in level is found on the left side, turn the guide roll-
er 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. 4-2c.)
(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. 4-2b.)
[Perform adjustment step (9) only for the models equipped
with SP mode and EP (or LP) mode.]
[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).
Fig.4-2b
Digit-key0123456789
Code 20 21 22 23 24 25 26 27 28 29
Signal (A) • Back tension cassette gauge [PUJ48076-2]
Mode (B1)
(B2)
•PB
• Eject end
Adjustment part (F) • Adjust pin [Mechansim assembly]
Specified value (G) •25 - 51 gf•cm (2.45 - 5 x 10-3 Nm)
FDP
Signal (A1)
(A2)
• Alignment tape(SP, stairstep, PAL) [MHPE]
• Alignment tape(LP, stairstep, PAL) [MHPE-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]
OK
NG
ADJUST PIN
TENSION ARM
Stamping(b)
Stamping(a)
CONTROL PLATE
(a)GUIDE ROLLER
(b)GUIDE POLE
Improper Proper

1-16 (No.YD084)
Fig.4-2c
4.2.3 Height and tilt of the A/C head
Note:
•Set a temporary level of the height of the A/C head in ad-
vance to make the adjustment easier after the A/C head
has been replaced. (Refer to the SERVICE MANUAL
No.86700 [MECHANISM ASSEMBLY].)
(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 unit to the manual tracking mode.
(4) Adjust the AUDIO OUT waveform and Control pulse wave-
form 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.
Fig.4-2d
4.2.4 A/C head phase (X-value)
(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. 4-
2e.)
(5) Rotate the roller driver so that the A/C head comes closest
to the capstan. From there, move the A/C head back grad-
ually toward the drum until the point where the FM wave-
form 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-tracking
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 cen-
ter position.
Fig.4-2e
Fig.4-2f
Signal (A) • Alignment tape(SP, stairstep, PAL) [MHPE]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1)
(D2)
• TP106 (PB. FM)
• TP4001 (CTL. P)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • A/C head [Mechanism assembly]
Specified value (G) • Maximum waveform
Improper waveform variation
A
B
CD
Up Down
Guide roller
(supply side)
Roller driver
Proper waveform variation
Head base
A/C head
AUDIO OUT
CTL.P
(1)
(2)
(3)
Signal (A1)
(A2)
• Alignment tape(SP, stairstep, PAL) [MHPE]
• Alignment tape(LP, stairstep, PAL) [MHPE-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) • Flat V.PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]
Head base
Roller driver
To the capstan
To the drum
Toward the capstan
Toward the drum
Screw (5)
Screw (4)
A/C head
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

(No.YD084)1-17
4.3 Electrical adjustment
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 referred
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 measur-
ing instruments as described in the following electrical adjust-
ment procedures. After this, proceed to the repair,
replacement and/or adjustment. If the required measuring in-
struments are not available in the field, do not change the ad-
justment parts (variable resistor, etc.) carelessly.
4.3.1 Servo circuit
4.3.1.1 Switching point
(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).
Fig.4-3a Switching point
4.3.1.2 Slow tracking preset
(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 “43-
08” from the Jig RCU to enter the slow playback mode,
and transmit the code “43-D0”for REV slow (-1/6x)
mode.
4.3.2 Syscon circuit
4.3.2.1 Timer clock
(1) Connect the frequency counter to the measuring point
(D1).
(2) Connect the short wire between the short point (D2) and
Vcc (5V).
(3) Short the leads of capacitor (D3) once in order to reset
the microprocessor of the Syscon.
(4) Disconnect the short wire between the short point (D2)
and Vcc then connect it again.
(5) Adjust the Adjustment part (F) so that the output frequency
becomes the specified value (G).
Signal (A1)
(A2)
• Stairstep signal
• Alignment tape(LP, stairstep, PAL) [MHPE-L]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • VIDEO OUT terminal (75 ohm terminated)
• TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • Jig RCU: Code “43-5A”
Specified value (G) • 6.5 ± 0.5H
Adjustment tool (H) • Jig RCU [PTU94023B]
Signal (A1)
(A2)
• Ext. input
• Color (colour) bar signal [PAL]
Mode (B1)
(B2)
• VHS SP
•VHSLP
Measuring point (D) • TV-Monitor
Adjustment part (F) • Jig RCU: Code “43-71”or “43-72”
Specified value (G) • minimum noise
Adjustment tool (H) • Jig RCU [PTU94023B]
V.sync
Trigger point
Switching point
V. rate
Signal (A) • No signal
Mode (B) • EE
Equipment (C) • Frequency counter
Measuring point (D1)
(D2)
(D3)
• IC3001 pin 61
• IC3001 pin 24
• C3026 + and -
Adjustment part (F) • C3025 (TIMER CLOCK)
Specified value (G) • 1024.008 ± 0.01 Hz
(976.5549 ± 0.0010 usec)

1-18 (No.YD084)
SECTION 5
TROUBLESHOOTING
5.1 Manually removing the cassette tape
If you cannot remove the cassette tape which is loaded because
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 unit and perform
the disassembly of the major parts before removing the
mechanism assembly. (See Fig. 5-1a)
Fig.5-1a
Fig.5-1b
(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.5-1b )
In case of mechanical failures, while keeping the ten-
sion 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-en-
gaging the hooks (a) and (b).
Fig.5-1c
(6) Take up the slack of the tape into the cassette. This com-
pletes removal of the cassette tape.
5.2 Manually removing the disk(DVD/CD)
If you cannot remove the disk which is loaded because of any
electrical or mechanical failures, manually remove it by taking the
following steps.
5.2.1 Method 1
(1) AC Plug is pulled out at once and inserted again.
(2) It is displayed on FDP as "PLEASE" and "WAIT" alternate-
ly, and while it blinks, pushing the OPEN/CLOSE button is
continued.
(3) After a while, a tray opens (About 20 seconds).
(4) After removed a disk, press the OPEN/CLOSE button
again to close the tray.The tray closes at about five sec-
onds.
(5) The "PLEASE" and "WAIT" alternately blink display of FDP
disappears and it will be in a standby mode.
(6) If the POWER button is pushed, it will usually be operating.
5.2.2 Method 2
(1) Unplug the ACpower cord from the AC outlet.
(2) Remove the top cover and front panel assembly.
(Refer to the disassembly procedure and perform the dis-
assembly of the major parts before removing)
(3) Pass a thin wire through a hole in the DVD unit.
(4) The disc tray comes out slightly. Take out the disc tray
manually.(See Fig.5-2a)
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)

(No.YD084)1-19
Fig.5-2a
5.3 Emergency display function (VHS SECTION)
This unit saves details of the last two emergencies as the EMG
history and allows the status of the unit and the mechanism of
each emergency to be shown both on the display and as OSD in-
formation.
When using the emergency function, it is required to set the unit
to the Jig RCU mode.
Fig.5-3a Jig RCU [PTU94023B]
5.3.1 Displaying the EMG information
The EMG detail of information can be displayed by transmitting
the code "43-59" from the Jig RCU.
Note:
•Press VHS/HDD/DVD SELECT button on the unit repeat-
edly first so that the VHS lamp lights up on the unit.
•The EMG detail information < 1 >< 2 > show the informa-
tion on the latest EMG.
It becomes “ - - : - - : - - ” when there is no latest EMG
record.
EMG display of 7 FDP display model
Fig.5-3b
EMG display of FDP display mode
(1) Transmit the code “43-59” from the Jig RCU.
The FDP shows the EMG content in the form of “E:**:**”.
(2) Transmit the code “43-59” from the Jig RCU again.
The FDP shows the EMG detail information < 1 > in the
form of “ *1: *2 : 34 ”.
(3) Transmit the code “43-59” from the Jig RCU once again.
The FDP shows the EMG detail information < 2 > in the
form of “ *5 : *6 : *7 ”.
(4) Transmit the code “43-59” from the Jig RCU once again.
The FDP shows the EMG detail information < 3 > in the
form of “*8 : *9 : *10”.
(5) Transmit the code “43-59” from the Jig RCU once again to
reset the display.
5.3.2 Clearing the EMG history
(1) Display the EMG history.
(2) Transmit the code “43-36” from the Jig RCU.
(3) Reset the EMG display.
5.3.3 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
partially different from the mechanism sensor informa-
tion in EMG detail information < 1 >.
[For MN* only]
disk tray hole
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the " " ( 3 ) button
after the data code is set.
Jig RCU
0: 00
E: **
1E: **
1: *1
2: *2
3: 34
4: *5
5: *6
6: *7
7: *8
8: *9
9: *1 0
Normal display
EMG content display (Latest) See 5.3.4
EMG content display (Previous) See 5.3.4
EMG detail information <1> See 5.3.5
[Deck operation mode]
EMG detail information <1> See 5.3.5
[Mechanism operation mode]
EMG detail information <1> See 5.3.5
[Mechanism sensor information and Mechanism mode position]
EMG detail information <2> See 5.3.6
[Type of the cassette tape in use <1>]
EMG detail information <2> See 5.3.6
[Winding position of the cassette tape in use]
EMG detail information <2> See 5.3.6
[Type of the cassette tape in use <2> (Winding area)]
EMG detail information <3> See 5.3.7
[Previous deck operation mode]
EMG detail information <3> See 5.3.7
[The deck operation mode of the one before the last]
EMG detail information <3> See 5.3.7
[The deck operation mode of the one prior to one above]
*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
*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)
*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
<Example 1> E : 01
Latest EMG
No EMG record
<Example 2> E : - -
AA BB CC DD EE
FF GG HH I I J J
KK L L MM NN OO
PP QQ RR SS TT
UU VV WW XX YY

1-20 (No.YD084)
*FF:Sensor information details
[For *HD only]
*DD:Sensor information details
[For both MN*/HD*]
Mechanism mode sequence
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
FF : 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.
JJ : Supply reel winding diameter data lower 8 bits.
KK : Mechanism sensor information & mechanism mode posi-
tion(See EMG detail of information < 1 >.)
LL : 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
AA : Key code (JVC code)
BB : Deck operation mode(See EMG detail information < 1
>.)
CC : Mechanism operation mode (See EMG detail informa-
tion < 1 >.)
DD : Sensor information (See sensor information details.)
EE : Capstan motor speed (Search, double speed)
FF : 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
<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
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
LSA
LSB
LSC
LSD
Encoder output = Low
or
Trerminal - GND = SHORT
Encoder output = High
or
Trerminal - GND = OPEN
Mechanism mode - Encoder data
1110 9876
543
21
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