JVC SR-DVM70AG User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.YD049
2005/4
DVD / HDD & Mini DV VIDEO RECORDER
YD04920054
SR-DVM70AG, SR-DVM70EU
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
SR-DVM70AG, SR-DVM70EU [D4MC29]
DV H DD DV D
DVD
CABLE/SAT
TV
DVD
PR
NEXTPREVIOUS
PAU S EREC
REC MODE
REMAIN
DISPLAY ON SCREEN
SLOWSLOW PLAY/SELECT
STOP/
CLEAR
NAVIGATIONTOP MENU
RETURN
ENTER
MENU
TV/CBL/SAT
STANDBY/ON
TV TV
AV
VIDEO
TV
AUX CANCEL MEMO/MARK
PROGRAMME EDITDUBBING LIVE
JUMP
SET UP
SAT
AUDIO SUBTITLE
VPS/PDC
ANGLE
LIVE CHECK
PROGRESSIVE
SCAN
EJECTEJECTDISPLAY
OPERATE
DV/HDD/DVD REC MODE INSTANT REPLAY AUDIO DUB. INSERT
S-VIDEO
IN F-1
VIDEO (MONO)L - AUDIO - R
RECDVDRECHDDRECDV
DV IN/ OUT
RECPAU S EPLAY
INPUT SELECT FFREWSTOP
(EU model)
(AG model)

1-2 (No.YD049)
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.
• Cassettes marked Mini DV can be used with the DV deck of this unit. The DV deck can play back and record only PAL signals.
• SHOWVIEW is a trademark of Gemstar Development Corporation. The SHOWVIEW system is manufactured under licence from Gemstar Devel-
opment Corporation.(EU MODEL)
• G-CODE is registered trademarks of Gemstar Development Corporation. The G-CODE system is manufactured under license from Gemstar De-
velopment Corporation.(AG MODEL)
• (i.Link) refers to the IEEE1394-1995 industry specification and extensions thereof. The logo is used for products compliant with the i.Link stan-
dard.
SR-DVM70AG SR-DVM70EU
GENERAL
Power requirement AC 220 V ~ 240 V, 50 Hz/60 Hz
Power consumption
Power on 45 W
Power off 18 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 ×372 mm
Weight 6.2 kg
Input/Output
Video input 0.5 - 2.0 Vp-p, 75 Ω(pin jack)
Video output 1 Vp-p, 75 Ω(BNC)
Audio input -8 dB, 50 kΩ(pin jack), Corresponding to mono (left)
Audio output -8 dB, 1 kΩ(pin jack)
21-pin SCART connectors IN/OUT ×1, IN/DECODER ×1
S-video input Y: 0.8 - 1.2 Vp-p, 75 Ω, C: 0.2 - 0.4 Vp-p, 75 Ω
S-video output Y: 1.0 Vp-p, 75 Ω, C: 0.3 Vp-p, 75 Ω
DV 4-pin for DV IN/OUT
Component video output Y: 1.0 Vp-p, 75 Ω, CB/CR, PB/PR: 0.7 Vp-p, 75 Ω
Corresponding to copy protection
Remote Input Ø3.5 mm
Digital audio output Optical: -18 dBm, 660 nm, Coaxial: 0.7 Vp-p, 75 Ω,
Corresponding to Dolby Digital and DTS Digital Surround
Bit stream Selectable in digital audio output setting menu
VIDEO/AUDIO (DVD deck)
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)
Video recording compression system MPEG2 (VBR)
Audio recording system Dolby Digital (2 ch), Linear PCM (XP mode only)
Recording time Maximum 300 hours (with 160 GB HDD)
(XP): Approx. 34 hours, (SP): Approx. 69 hours, (LP): Approx. 138 hours
(EP): Approx. 209 hours, (FR): Approx. 300 hours
VIDEO/AUDIO (DV Deck)
Signal system PAL colour signal, 625 lines/50 fields
Recording system Digital Component Recording
Format DV format (SD mode)
Cassette Mini DV Cassette
Maximum recording time
(SP) (SP): 80 min. with M-DV80ME cassette
(LP) (LP): 120 min. with M-DV80ME cassette
Audio recording system PCM 48 kHz, 16 bit (2 ch)/32 kHz, 12 bit (4 ch)
TUNER/TIMER
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
Memory backup time Approx. 60 minutes
ACCESSORIES
Provided accessories
RF cable, Input Cable Adapter, Output
Cable Adapter, Audio/Video Cable, Infrared
remote control unit, "R6" battery ×2
RF cable, 21-pin SCART cable,
SCART/RCA adapter ×2, Infrared remote
control unit, "R6" battery ×2

(No.YD049)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.YD049)
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.YD049)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.YD049)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 Different table of features
The following table indicates main different points between models SR-DVM70AG and SR-DVM70EU.
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, DV jack, junction and Main
board assemblies.
(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 SR-DVM70AG SR-DVM70EU
DVD REGIONAL CODE REGION 3 REGION 2
MAIN
board
assembly
SWITCHING
REGULATOR
board assembly
JUNCTION
board assembly
DV JACK
board
assembly
DISPLAY / SWITCH
board assembly
OPERATION / JACK
board assembly
DIGITAL
board
assembly
HDD
DVD
UNIT
REAR JACK
board assembly
DV MAIN
board
assembly
MDA
board
assembly
TP3903
TP3904
TP3905
TP3906
TP3908
TP3902
TP3901
TP3907

(No.YD049)1-7
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 number key "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 "DV/HDD/DVD" select button repeatedly on the
unit so that the DVD 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 unit simulta-
neously. Alternatively, transmit the code "43-9D" from the
Jig RCU.
( blinked)
Jig RCU mode
User RCU mode

1-8 (No.YD049)
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
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
15
15
4
40
40
4
6
28
20
14
6
19
4
19
2
6
19
11
4
9
8
3
15
8
20
5
8
8
7
7
WR2a
WR2b
WR3a
WR3b
WR4a
WR4b
WR4c
CN7108
(CN1001)
CN7109
(CN1002)
CN7121
(CN1802)
WR5a
WR6a
WR6b
WR6c
WR6d
WR8a
WR8b
WR8c
WR8d
WR8e
WR9a
WR9b
WR11a
WR11b
WR11c
WR11d
WR12a
WR12b
WR12c
WR12d
Main
Main
Junction
Digital
Digital
Digital
Junction
Junction
Junction
Junction
Junction
SW. REG
SW. REG
SW. REG
SW. REG
Junction
Main
Main
Main
Main
Rear jack
Rear jack
DV Main
DV Main
DV Main
DV Main
Main
Main
Main
Main
CN3104
CN3102
CN5504
CN2201
CN2101
CN1405
CN5502
CN7108
CN7109
CN7121
CN7126
CN5304
CN5303
CN5301
CN5302
CN7127
CN3103
CN2602
CN701
CN901
CN951
CN952
CN1502
CN4001
CN1501
CN5501
CN5404
CN2601
CN501
CN3104
Operation/jack
Display/switch
DVD unit
DVD unit
HDD
Junction
Digital
Digital
Digital
Digital
DV jack
Junction
HDD
Main
Fun motor
DV Main
Junction
Junction
Junction
Junction
Main
Main
DV mechanism sensor
DV drum motor
DV MDA
Main
DV Main
DV Main
DV Main
DV Main
CN7201
CN7001
CN1406
CN1003
CN1001
CN1002
CN1802
CN4104
CN5501
CN5402
CN2002
CN7102
CN8001
CN7123
CN7107
CN902
FW851
CN5506
CN5403
CN1001
CN3701
CN3501
CN1503
(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)
----------------------------------------
Top cover
Front panel assembly
(Operation jack board assembly)
(Display/switch display board assembly)
DVD unit
(Bracket)
Digital board assembly
DV jack board assembly
Switching regulator board assembly
HDD
(Bracket),(Sheet)
Junction board assembly
Rear jack board assembly
Rear cover
DV mechanism assembly
DV main board assembly
(Bracket)
Bracket(DV MAIN)
Main board assembly
8(S1a)
(S2a),3(L2a),5(L2b)
CN3104(WR2a),CN3102(WR2b )
4(S3a),4(S3b)
CN5504(WR3a),CN2201(WR3b)
4(S4a),CN2101(WR4a)
CN1405(WR4b),CN5502(WR4c),
CN7108(CN1001),CN7109(CN1002)
CN7121(CN1802)
(S5a),CN7126(WR5a)
4(S8a)
CN5304(WR6a),CN5303(WR6b),
CN5301(WR6c),CN5302(WR6d)
4(S7a),4(S7b)
(S8a),CN7127(WR8a),
CN3103(WR8b),
CN2602(WR8c),
CN701(WR8d),CN901(WR8e)
3(S9a),CN951(WR9a),CN952(WR9b)
7(S10a),(S10b),3(L10a)
3(S11a),CN1502(WR11a),
CN4001(WR11b),
CN1501(WR11c),CN5501(WR11d)
4(S12a),4(S12b),CN5404(WR12a),
CN2601(WR12b),CN501(WR12c),
CN3104(WR12d)
3(S13a)
3(S14a)
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
Step/
Loc No.
Part Name No.
Fig. Point Note
3-1b
3-1a
3-1b
3-1a
3-1b
3-1a
3-1b
3-1a,3-1b
3-1a
3-1b
3-1a
3-1b
3-1a
3-1b
3-1b
3-1b
3-1a
3-1b
3-1a
3-1b
3-1b
3-1a,3-1b
<Note2a>
<Note2b>
<Note2a>
<Note2a>
<Note2a>
<Note2a>
<Note2a>
<Note3a>
<Note3b>

(No.YD049)1-9
<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 attaching the Front panel assembly, make sure that the
door opener of DV deck is in the down position.
<Note 3a>
• When reattaching the bracket(DV MAIN), secure the screws
(S13a) in the order of 1,2,3.
<Note 3b>
• When reattaching the Main board assembly, secure the
screws (S14a) in the order of 1,2,3.
Fig.3-1a
CN7123
DRIVE UNIT
CN8001
CN2602
CN3104
CN3102
CN3103
CN7102
CN5402
CN5301
DIGITAL
BOARD ASSY
CN5502
CN2201
DV JACK BOARD ASSY
CN2101
SWITCHING REGLATOR
BOARD ASSY
JUNCTION BOARD ASSY
CN5504
CN5304
CN5501
CN7107
CN5303
CN5302
FAN
CN5001
CN7106
CN4001
DV MAIN BOARD ASSY
CN5403
CN5404
CN2601
CN501
CN3014
CN1001 CN3701 CN1503
CN1501
CN3501
CN5506
CN5501
CN902
CN951
CN701
CN901
CN2002
MAIN BOARD ASSY
REAR JACK
BOARD ASSY
CN7127
CN1405
FW851
CN852
CN1003
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. TOP SIDE
BOTTOM SIDE
CN7201
CN7001
Display/switch board assembly
Operation/jack board assembly
CN7126
CN4104
(WR11d) (WR12a)
<Note2a>
(WR12b)
<Note2a>(WR12c)
<Note2a>
(WR12d)
<Note2a>
(WR9a)
<Note2a>
(WR4a)
<Note2a>
(WR8c)
(WR8b)
(WR6d)
(WR9b)
(WR8e)
<Note2a>
(WR6a)
<Note2a>
(WR6b)
(WR3a)
(WR2a)
<Note2a>
(WR2b)
<Note2a>
<Note2b>
(WR8d)
<Note2a>
(WR4c)
(WR11c)
<Note2a>
(WR3b)
<Note2a>
(WR8a)
(WR5a)
(WR4b)
<Note2a>
(WR6c)
<Note2a>
D

1-10 (No.YD049)
Fig.3-1b
(S2a)
(L2a)
(L2a)
(L2b)
(L2b)
(L2b)
c
3
3
1
1
2
2
CN4001
CN1502
j
u
(S11a)
(S11a)
(WR11b)
<Note2a>
(WR11a)
<Note2a>
(S11a)
(S12a)
(S12b)
(S12a)
(S12b)
(S12b)
(S13a)
(S13a)
(S14a)
(S14a)
(S14a)
(S13a)
Bottom chassis
[12]DV main board assembly
[12]Bracket
[13]Bracket(DV MAIN)
[14]Main board assembly
[11]DV mechanism assembly
j
[5]DV jack board assembly
[8]Junction board assemly
[4]Digital board assembly
(S5a)
(S4a)
(S4a)
(S4a)
(S8a)
CN5001
CN5302
[6]Switching regulator
board assembly
[7]HDD
[7]SHEET
[7]Bracket(HDD)
(S7a)
(S7a)
(S7a)
(S7b)
(S7b)
(S7b)
(S6a)
(S6a)
(S6a)
(S3a)
(S3a)
(S3a)
(S3a)
(S3b)
(S3b)
[3]Bracket
[3]DVD unit
[9]Rear jack board assembly
[10]Rear cover (S10a)
(S9a)(S10a)
(S10a)
(L10a)
(L10a)
(L10a)
(S10b)
(S1a)
(S1a)
(S1a)
(S1a)
(S1a)
(S1a)
(S1a)
(S1a)
[1]Top cover

(No.YD049)1-11
SECTION 4
ADJUSTMENT
4.1 Before adjustment
4.1.1 Precautions
(1) Observe the specified screw tightening torque when
attaching parts. The torque should be 0.04 Nm (0.4 kgfcm)
unless otherwise specified.
(2) Always disconnect the power supply unit before proceed-
ing to solder or attach parts.
(3) When plugging or unplugging a wire, be careful not to
damage the connector.
(4) When replacing a part, be careful not to damage other
parts or to mistakenly attach parts.
4.1.2 Tools required for adjustments
Table 4-1-1
4.1.3 Disassembly and assembly procedures
The following table shows the steps for assembling or disassem-
bling the mechanism parts. Read the following descriptions care-
fully before actual assembly/disassembly operations.
(1) : Order of disassembly steps. Reverse this order when as-
sembling.
(2) : Name of the disassembled/assembled part.
(3) :
Surface where the disassembled/assembled part is
mounted. T = Top. B: Bottom.
(4) : Number of disassembly drawing.
(5) : Parts to be removed in disassembly/assembly, such as
screws, washers and springs, and the points.
(6) : Notes for disassembly/assembly.
(7) : For the phase alignment in disassembly/assembly and
the parts which require phase adjustments after assembly,
see "4.7 Mechanism phase check/adjustment".
4.1.4 Screws and washers used in disassembly/assembly
of the mechanism assembly
Table 4-1-2 shows the symbols and part numbers of the screws
and washers used in the mechanism assembly.
When disassembling or assembling the mechanism assem-
bly,be sure to attach screws and washers correctly by referring
to the following table.
Table 4-1-2
3
BIT
YTU94088-003
12
TORQUE DRIVER
YTU94088
Tool for installing slit washer
YTU94121A
Tool for replacing tip IC
PTS40844-2
4
Symbol Name & Point
SScrew
W Washer
PSpring
* Connector, lock(L), soldering(SD),
shield, etc.
[Example] • (W1) = Remove the washer W1.
• (P1) = Remove the spring P1.
Symbol Part number
(S1) QYSDSP2005ZA
(S2) YQ43893
(S3) YQ43893-7
Symbol Part number
(W1) YQ44246
(W2) YQ44246-3
Step/Loc No. Fig. No. Point Note Discription
[A] Cassette housing assembly/
[B] Mechanism assembly
[1]Drum assembly
[2]Motor bracket assembly
[3]Middle catcher assembly
Part Name
1
2
3
4
1
2
2
3
1
2,3
2,4
2(S1),(L1) (L5)
3(S2)
4(S2)
3(S2)
T
T
T
T
(1) (2) (3) (4) (5) (6) (7)

1-12 (No.YD049)
4.2 Disassembly/assembly of the mechanism assembly
4.2.1 Introduction
The disassembly and assembly of the mechanism assembly should usually be performed in the ASSEMBLY mode.(Table 4-2-1)
Note that the mechanism is in the cassette in (C-IN) mode when the mechanism assembly is taken out of the set and that the C-IN
mode should be switched to the ASSEMBLY mode in this case.
To set the ASSEMBLY mode, apply 3 V DC to the electrodes on the upper part of the loading motor as shown in Fig. 4-2-7.
Table 4-2-1
4.2.2 Mechanism modes
The mechanism has 6 modes as shown in Table 4-3-1. The current mode can be confirmed by the positioning of the " " marking on
the sub-cam gear and the " " marking on the mechanism. See the following figures (Figs. 4-2-1 to -6) for details.
Note:
• This mechanism assembly has another ASSEMBLY mode. However, this mode cannot be identified from the markings because
it corresponds to an intermediate position between the C-IN ( C ) mode and S-FF ( H ) mode. This mode can be confirmed by the
rotary encoder phase. See Fig. 4-2-7.
1. Checking the mechanism mode
R. ENC -20
ROTARY
ENCORDER [2]
[1]
[3]
MAIN CAM GEAR 0
C-IN
ASSEMBLY
S. FF
LOADING END
PLAY REV STOP FF/REW
0
15
33.33
40
166.66
140
193.33
160
226.66
185
273.33
220
306.66
245
36
17
169.66
87
190.33 196.33
223.66 229.66
270.33 276.33
303.66
30.33 36.33
MODE
PARTS
[H][C][H][P]
[F][S][R]
Fig.4-2-1
Fig.4-2-4
Fig.4-2-2
Fig.4-2-5
Fig.4-2-3
Fig.4-2-6

(No.YD049)1-13
2. Setting/checking the ASSEMBLY mode
Fig.4-2-7
Motor bracket assembly (Loading Motor)
Wire (Brown)
Wire (Red)
DC 3 V
Rotary encoder
Marking
(Colored red)
[H]
[C]
< ASSEMBLY >

1-14 (No.YD049)
4.3 Mechanism timing chart
See following table (Table 4-3-1).
Table 4-3-1
POLE BASE
ROTARY ENCODER -20
CTL PLATE
MAIN BRAKE(SUP)
MAIN BRAKE(TU)
SUB BRAKE
PINCH ROLLER
EXIT GUIDE ARM
TENSION ARM
BAND ARM PLATE
CLUTCH LOCK
CENTERRING ARM
ROTARY
ENCODER [2]
[1]
[3]
MAIN CAM 0
0
SUB CAM
ON
OFF
S/REV
PLAY
FF/REW
ON 1
ON 2
OFF
ON 1
ON 2
OFF
ON
OFF
ON(REV MODE PRESS UP)
ON(PLAY MODE)
OFF
OFF
ASSY
HALF LOADING
ON
OFF
OFF 2
OFF 1
ON
OFF 2
OFF 1
ON
SUP CENTRRING
S/REV
C-IN
ASSEMBLY
S. FF
LOADING END
PLAY REV STOP FF/REW
0
15
33.33
40
4015
166.66
140
140
193.33
160
160
226.66
185
185
273.33
220
220
306.66
245
245
36
17
169.66
87
190.33 196.33
223.66 229.66
270.33 276.33
303.66
30.33 36.33
MODE
PARTS

(No.YD049)1-15
4.4 Mechanism assembly/disassembly procedure table
Step/Loc
No. Part Name Fig. No. Point Note Discription
1 [A] Cassette housing assembly/ [B] Mechanism assembly T 4-5-1 2(S1),(L1) (L5) 1
2 [1] Drum assembly T 4-5-2 3(S2) 2,3
3 [2] Motor bracket assembly T 4-5-2 4(S2) 2,4
4 [3] Middle catcher assembly T 4-5-3 3(S2)
5 [4] Reel cover assembly T 4-5-3 (S2), 2(L6) 5
6 [5] Pinch roller arm assembly T 4-5-4 (W1), (L7) 6
7 [6] Sub brake assembly T 4-5-4 (P1), (W1), (L8)
8 [7] Band arm plate sub assembly T 4-5-4 (S3), (L9), (P2), (W2) 7,8
9 [8] Tension arm sub assembly T 4-5-4 (P3) 8
10 [9] EXIT guide arm assembly T 4-5-5 (W1)
11 [10] Swing arm assembly T 4-5-5 Position alignment
12 [11] Sub deck assembly T 4-5-6 4(S2) 9 Position alignment
13 [12] Main brake (Supply) assembly T 4-5-6 (P4), (L10)
14 [13] Main brake (Take up) assembly T 4-5-6 (P5), (L11)
15 [14] Reel disk assembly (Supply) T 4-5-7
16 [15] Reel disk assembly (Take up) T 4-5-7
17 [16] Prism T 4-5-7 (S2)
18 [17] Control plate T 4-5-7 2(L12)
19 [18] Guide rail (Take up) assembly T 4-5-8 4(S2) 10 Position alignment
20 [19] Guide rail (Supply) assembly T 4-5-8 (S2), 2(L13) 10 Position alignment
21 [20] Base plate assembly T 4-5-8 (S2), 2(L14)
22 [21] Ent. guide base assembly T 4-5-9 (S2)
23 [22] Worm wheel 2 T 4-5-9 11 Phase alignment
24 [23] Timing belt T 4-5-9
25 [24] Center gear assembly T 4-5-9
26 [25] Reel drive pulley assembly T 4-5-10 (W1)
27 [26] Push plate T 4-5-10 (W1)
28 [27] Clutch lock gear (2) T 4-5-10
29 [28] Clutch lock gear (1) T 4-5-10 (P6)
30 [29] Tension control arm assembly T 4-5-11 (L15) 12 Position alignment
31 [30] Brake control arm assembly T 4-5-11 (W1), (L16) 12 Position alignment
32 [31] Charge arm assembly T 4-5-11 (L17) 13 Position alignment
33 [32] Connect gear 2 T 4-5-12 (S2) (Phase alignment)
34 [33] Connect gear 2 T 4-5-12 (S2) (Phase alignment)
35 [34] Rotary encoder assembly T 4-5-13 2(S2) 14 Phase alignment
36 [35] Main cam T 4-5-13 (W1) 15 Phase alignment
37 [36] Arm gear 1 assembly T 4-5-13 Collar 15,16 Position alignment
38 [37] Centering arm assembly T 4-5-13 (L18) 15 Position alignment
39 [38] Sub cam T 4-5-14 (S2) 17 Phase alignment
40 [39] Arm gear 2 assembly T 4-5-14 17 Position alignment
41 [40] Clutch lock lever assembly T 4-5-14 (L19) 17,18 Position alignment
42 [41] Capstan motor T 4-5-15 (P7), Adjust nut Vertical adjustment
43 [42] Drum base deck T 4-5-15 3(S2)

1-16 (No.YD049)
Fig.4-4-1
[2][19][42][1][18][41][3]
[17][
12][ 16][36][20][ 4][ 32][ 26]
[10]
[33][24][13][28]
[21]
[11]
[22]
[8]
[34]
[35]
[14]
[37]
[7]
[29]
[30]
[23]
[9]
[25]
[5]
[15]
[38]
[39]
[31]
[6]
[40]
–
TOP VIEW

(No.YD049)1-17
4.5 Disassembly/assembly
1. [A] Cassette housing assembly/ [B] Mechanism assembly
Fig.4-5-1
<Note 1a>:
If the wires for the cassette housing motor are connected to
the circuit board, remove them before disassembly.
2. [1] Drum assembly / [2] Motor bracket assembly
Fig.4-5-2
<Note 2a>:
If wires are connected to the circuit board, remove them be-
fore disassembly.
<Note 2b>:
Be careful not to damage the drum assembly when remov-
ing it.
<Note 2c>:
The bracket (DV) may come in the way of removal of screw
(7). Be sure to remove the bracket before proceeding to the
screw removal.
Fig.4-5-2a
1
(S1)
2
(S1)
(L2)
(L4)
(L5)
(L1)
(L3)
<Note1a>
[A]
[B]
5
(S2)
3
(S2)
4
(S2)
7
(S2)
6
(S2)
9
(S2)
8
(S2)
<Note2a>
<Note2a>
<Note2c>
<Note2b>
[2]
[1]
NOTE: Fasten screw in order
of .
[a]
[b]
[c]
[a] [b][c]
When Handling hold this part.

1-18 (No.YD049)
3. [3] Middle catcher assembly/ [4] Reel cover assembly
Fig.4-5-3
<Note 3a>:
Once the reel cover assembly has been removed, the parts
located below it tend to slip out easily: Be careful.
<Note 3b>:
When attaching these screws, screwing order (a),(b),( c)
4. [5] Pinch roller arm assembly/[6] Sub brake assembly/[7] Band arm plate sub assembly/ [8] Tension arm sub assembly
Fig.4-5-4
Fig.4-5-4a
Fig.4-5-4b
<Note 4a>:
When attaching this part, fit it in the boss (L7) on the charge
arm assembly.
<Note 4b>:
When attaching or removing this part, take care of the han-
dling of the band section.
<Note 4c>:
After fitting the spring on the shaft, engage it with hook [a]
first then with hook [b] .
After attaching it, set it to the positioning shown in "Step 3"
and confirm that band arm plate sub assembly [7] can be ro-
tated in the direction of the arrow as shown below.
13
(S2)
(L6)
(L6)
<Note3a>
(a)
(b)
(c)
Apply grease
12
(S2)
<Note3b>
10
(S2)
<Note3b> 11
(S2)
<Note3b>
[4]
[3]
(W1)
(W2)
14
(S3)
(P2)
(L9)
(L7)
(L8)
(W1)
(P1)
(P3)
<Note 4c>:
How to install the spring
<Note4a>
<Note4b>
NOTE4c
Step 1
Step 2
Step 3
Hook [a]
Hook [b]
[7]
[8]
[5]
[6]
sub brake (Take up)
OK NG
spring hooked
reverse-side

(No.YD049)1-19
5. [9] Exit guide arm assembly/ [10] Swing arm assembly
Fig.4-5-5
<Note 5a>:
Exit guide arm assembly phase alignment.
Fig.4-5-5a
6. [11] Sub deck assembly/ [12] Main brake (Supply) assembly/[13] Main brake (Take up) assembly
Fig.4-5-6
<Note 6a>:
When attaching the sub deck assembly, make sure to adjust
the phase of the control plate.
Fig.4-5-6a
Fig.4-5-6b
(W1)
<Note5a>
[10][9]
Exit guide arm assembly
Charge arm assembly
Gear alignment
Exit guide arm
assembly
Arm gear 2
assembly
This protrusion is
combined to
the dent of Charge
arm assembly.
18
(S2)
15
(S2)
16
(S2)17
(S2)
(L10)
(L11)
(P4)
(P5)
<Note6a>
[13]
[12]
[11]
Main brake (Supply)
OK NG
spring hooked
reverse-side
Main brake (Take up)
OK NG
Twisted spring

1-20 (No.YD049)
7. [14] Reel disk assembly (Supply) / [15] Reel disk assembly (Take up) / [16] Prism / [17] Control plate
Fig.4-5-7
8. [18] Guide rail (Take up) assembly / [19] Guide rail (Supply) assembly / [20] Base plate assembly
Fig.4-5-8
<Note 8a>:
When attaching, set the alignment markings of the two gears
so that the markings face opposite to each other.
Fig.4-5-8a
(L12)
(L12)
19
(S2)
[14]
[17]
[15]
[16]
[11]
25
(S2)
20
(S2)
21
(S2)
24
(S2)
22
(S2)
23
(S2)
(L13)
(L14)
<Note8a>
[20]
[19]
[18] [19][18]