JVC HRXV-31-EX Service manual
SERVICE MANUAL
DVD PLAYER & VIDEO CASSETTE RECORDER
YD002200311
HR-XV3EK, HR-XV31EK,
HR-XV32EK, HR-XV3EX,
HR-XV31EX, HR-XVS30EK,
HR-XVS30EX
(EK models)
(EX models)
(S-VHS models)
HR-XV3EK, HR-XV31EK, HR-XV32EK, HR-XV3EX, HR-XV31EX, HR-XVS30EK, HR-XVS30EX [D3PV1,D3PS1]
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
(VHS models)
(S-VHS models)
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.YD002
2003/11
SPECIFICATION
HR-XV3EK, HR-XV31EK,
HR-XV32EK
GENERAL
Power requirement AC 220V - 240V, 50 Hz/60 Hz
Power consumption
Power on 26 W 30 W
Power off 6.0 W
Temperature
Operating 5°C to 40°C
Storage -20°C to 60°C
Operating position Horizontal only
Dimensions (W×H×D) 435 mm × 93 mm × 272 mm
Weight 4.5 Kg 4.4 Kg 4.5 Kg 4.4 Kg
Format VHS PAL standard S-VHS/VHS PAL standard
Maximum recording time
(SP) 240 min. with E-240 video cassette
(LP) 480 min. with E-240 video cassette
(EP) - 720 min. with E-240 video cassette
VIDEO/AUDIO (VCR deck)
Signal system PAL-type colour signal and CCIR monochrome signal, 625 lines/50 fields
Recording system DA4 (Double Azimuth) head helical scan system
Signal-to-noise ratio: 45 dB
Horizontal resolution 250 lines SP/LP: 250 lines (VHS)/400 lines (S-VHS)
Frequency range 70 Hz to 10,000 Hz (Normal audio) 20 Hz to 20,000 Hz (Hi-Fi audio)
Input/Output 21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1
RCA connectors: VIDEO IN × 1, AUDIO IN × 1, AUDIO OUT × 1
VIDEO/AUDIO (DVD deck)
Signal system PAL
Applicable disc DVD (12 cm, 8 cm), CD (12 cm, 8 cm)
Audio characteristics DVD:4 Hz - 22 KHz
Frequency response CD:4 Hz - 20 KHz
S/N Ratio 90 dB
Wow and flutter Below Measurable Level
Dynamic range 90 dB
Output
Component-Y - (RCA) 1.0 Vp-p/75 Ω
Component-PB/PR - (RCA) 0.7 Vp-p/75 Ω
Audio (RCA) 2 Vrms, 1 KΩ
Digital Audio -21 dBm to -15 dBm(peak)
TUNER/TIMER(VCR deck)
TV channel storage
capacity
Tuning system Frequency synthesized tuner
Channel coverage VHF : 44.5 MHz - 143 MHz/
143MHz - 470 MHz
UHF : 470 MHz - 862 MHz
Aerial output UHF channels 22 - 69 (Adjustable)
Memory backup time Approx. 10 min.
ACCESSORIES
Provided accessories RF cable, Infrared remote control unit, "R6" battery × 2
HR-XV3EX, HR-XV31EX HR-XVS30EK HR-XVS30EX
EP: 220 lines (VHS)/350 lines (S-VHS)
21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1
99 positions (+AUX position)
VHF : 47 MHz - 89 MHz/
104 MHz - 300MHz/302 MHz 470 MHz
UHF : 470 MHz - 862 MHz
RCA connectors: VIDEO IN × 1, AUDIO IN × 1, AUDIO OUT × 1
VHF : 44.5 MHz - 143 MHz/
143 MHz - 470 MHz
UHF : 470 MHz - 862 MHz
S-Video connector: IN × 1
VHF : 47 MHz - 89 MHz/
104 MHz - 300 MHz/302 MHz 470 MHz
UHF : 470 MHz - 862 MHz
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.
1-2 (No.YD002)
1.4 Precautions for Service
1.4.1 Handling of Traverse Unit and Laser Pickup
(1) Do not touch any peripheral element of the pickup or the actuator.
(2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.
(3) Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)
(4) To replace the traverse unit, pull out the metal short pin for protection from charging.
(5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of
the flexible wire to open the circuit.
(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.
Do not change the setting of these half-fixed resistors for laser power adjustment.
1.4.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements of
the traverse unit or pickup, be sure to take the following electrostatic protection:
(1) Wear an antistatic wrist wrap.
(2) With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the
sheet or the plate.
(3) It solders to two short circuit sections on the substrate of a pick-up.
(4) After removing the flexible wire from the connector (CN101
(5) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup.
After completing the repair, remove the solder to open the circuit.
), short-circuit the flexible wire by the metal clip.
Pick-up
Short circuit
* Please refer to the SECTION3 DISASSEMBLY method for details.
CN101
DVD SERVO CONTROL BOARD
(No.YD002)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 Different table of feature
The following table indicates main different points between models HR-XV3EK, HR-XV31EK,HR-XV32EK, HR-XV3EX, HR-XV31EX,
HR-XVS30EK, and HR-XVS30EX.
HR-XV3EK HR-XV31EK HR-XV32EK HR-XV3EX HR-XV31EX HR-XVS30EK HR-XVS30EX
POWER PLUG 3PIN
BODY COLOR PURE SILVER
FRONT PANEL
COVER
REMOCON
COLOUR
VHS PAL/NTSC PB
S-VHS NOT USED
S-VHS ET NOT USED ←←←←USED ←
SQPB USED ←←←←NOT USED ←
RECORDING &
PLAYBACK SPEED
FRONT INPUT VIDEO,AUDIO
REAR L-1 INPUT SCART IN /
COMPORNENT
VIDEO OUT
BROADCASTING
STANDARD
STEREO
DECODER
RF OUT CH/RF OUT
SYSTEM[INITIAL]
VCR PLUS+ VIDEOPLUS+ ←←SHOWVIEW ← VIDEOPLUS+ SHOWVIEW
VPS/PDC NOT USED
OSD LANGUAGES VCR:ENGLISH
WMA(CD-R/RW) NOT USED
ILLUMINATION
COLOR
USED NOT USED USED ← NOT USED USED ←
GRAY ← BLACK GRAY ←←←
on PAL TV with
HiFi
SP/LP ←←←←SP/LP/EP ←
(L/R)
OUT(RGB)
NOT USED ←←←←DVD:Y/Pb/Pr ←
I ←←B/G,D/K ← I B/G,D/K
NICAM ←←NICAM/A2 ← NICAM NICAM/A2
22-69CH,OFF
[AUTO]/I
DVD:ENGLISH/
FRENCH/
GERMANY
BLUE NOT USED BLUE ← NOT USED BLUE ←
←←CEE ← 3PIN CEE
← BLACK PURE SILVER ←←←
←←PAL/MESECAM
(MANUAL) /
NTSC PB on
PAL TV with HiFi
← PAL/NTSC PB
on PAL TV with
HiFi
PAL/MESECAM
(MANUAL) /
NTSC PB on
PAL TV with HiFi
←←←←USED ←
←←←←S-VIDEO,
VIDEO,AUDIO
(L/R)
←←←←SCART IN / OUT
(Y/C,RGB)
←←22-69CH,OFF
[AUTO]/G,K
← 22-69CH,OFF
[AUTO]/I
←
←
22-69CH,OFF
[AUTO]/G,K
←←USED ← NOT USED USED
←←VCR:13
LANGUAGES
DVD:ENGLISH/
FRENCH/
GERMANY
← VCR:ENGLISH
DVD:ENGLISH/
FRENCH/
GERMANY
VCR:13
LANGUAGES
DVD:ENGLISH/
FRENCH/
GERMANY
←←←←USED ←
NOTE :
Mark ← is same as left.
1-8 (No.YD002)
2.2 Service position
This unit has been designed so that the Mechanism an d 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, Regulator
board assembly to the bottom chassis. If any other screws
are used to fix the boards, remove them also.
(3) Remove the combined Mechanism,Regulator borad and
Main board assemblies.
(4) If any other major parts are used, remove them also.
(5) Connect the wires an d 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 par ts and
details of the precautions to be taken, see "Removing
the major parts".
• If there are wire connections from the Main board an d
Mechanism assemblies to the other major parts, be sure
to remove them (including wires connected to the major
parts) first before performing step (2).
• When carrying out diagnosis and repair of the Main
board assembly in the "Service position", be sure to
ground both the Main board and Mechanism assemblies. If they are improperly grounded, there may be
noise on the playback picture or FDP counter display
may move even when the mechanism is kept in an inoperative status.
• In order to diagnose the playback or recording of the
cassette tape, set the Mechanism assembly to the required mode before placing it upside do wn. If the mechanism mode is changed (including ejection) while it is in
an upside down position the tape inside may be damaged.
• 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 disconnected.
Regulator board assembly
TP111 D.FF
TP4001 CTL.P
TP106 PB FM
TP2253 A.PB FM
TP2254 A.REC FM
Display board assembly
Main board assembly
Jack board assembly
Fig.2-2a
2.3 Jig RCU mode
This unit uses the following two modes for receiving remote control codes.
(1) User RCU mode:Ordinary mode for use by the user.
(2) Jig RCU mode: Mode for use in production and servicing.
When using the Jig RCU, it is required to set th e VCR to the Jig
RCU mode (the mode in which codes from the Jig RCU can be
received). As both of the above two modes are stored in the EEPROM, it is required to set the VCR back to the User RCU mode
each time that an adjustment is made or to check that the necessary operations have been completed.These modes can be set
by the operations described below.
Note:
• Confirm the RCU mode when exchanged parts. Since
some SERVICE PARTS sets the VCR to the Jig RCU
mode as initial setting. Therefore please set the VCR to
the user RCU mode after replacing the EEPROM.
User RCU mode
CH
Jig RCU mode
CH
(ޓnot displayed)
Fig.2-3a User/Jig RCU mode
2.3.1 Setting the Jig RCU mode
(1) Turn on the power.
(2) Press the following remocon keys continuously within 2
seconds " SET UP MENU " → " 2 " → " 8 " → " OK ".
When the VCR is set to the Jig RCU mode, the symbols
( " : " ) in the time display of the FDP are turned off.
(Refer to Fig.2-3a)
(No.YD002)1-9
2.3.2 Setting the User RCU mode
(1) Turn off the power.
(2) Press the "REC" and "PAUSE" buttons of the VCR si mul-
taneously. Alternatively, transmit the code "80" from the Jig
RCU.
2.4 Mechanism service mode
This model has a unique function to enter the mechanism into every operation mode without loading of any cassette tape. This
function is called the "Mechanism service mode".
2.4.1 How to set the "Mechanism service mode"
(1) Set the VCR to the Jig RCU mode (the mode in which
codes from the Jig RCU can be received)
(2) Transmit the code "E5" from the Jig RCU.
(3) Release the lug of th e Cassette holder and then slid e 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 VCR 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, resulting 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 tap e 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.
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.
2.5.3 Suggested servicing schedule for main components
The following table indicates the suggested perio d for such service measures as cleaning, lubrication and replacement. In practice, the indicated periods will vary widely according to
environmental and usage conditions. However, the indicated
components should be inspected when a set is b rought for service and the maintenance work performed if necessary. Also
note that rubber parts may deform in time, even if the set is not
used.
System Parts name
Operation hours
1000H 2000H
Drum assembly C,X X
A/C head C,X C,X
Pinch roller arm assembly C C
Tape
transport
Full erase head C C
Tension arm assembly C C
Capstan motor (Shaft) C C
Guide arm assembly C C
Capstan motor X
Capstan brake assembly X
Main brake assembly X
Drive
Belt (Capstan) X X
Loading motor X
Clutch unit X
Worm gear X
Control plate X
Other Rotary encoder X
C : Cleaning
X : Inspection or Replacement if necessary
1-10 (No.YD002)
A/C head
Video heads
Fig.2-6a
SECTION 3
DISASSEMBLY
3.1 Removing the major parts
3.1.1 Destination of connectors
Two kinds of double-arrows in connection tables respectively
show kinds of connector/wires.
: The connector of the side to remove
CONN. No. PIN No.CONNECTOR
WR2a
WR2b
Main CN101
Main CN103
Destination of connectors
CONN. No. PIN No.CONNECTOR
WR2a
WR2b
WR2c
WR3a
WR3b
CN5302
(CN501)
CN7301
(CN502)
WR6a
WR6b
Main
Main
Main
Main
Drum
assembly
Regulator
Main
Regulator
Regulator
3.1.2 How to read the procedure table
This table shows the steps for disassembly of the externally furnished parts and board assemblies. Reverse these steps when
re-assembling them.
Step/
Loc No.
[1] Top cover 3-1a
Part Name
Bracket 2(S1c)
: Wire: Flat wire : Board to board (B-B)
Digital CN761
Digital CN762
CN7104
CN3102
CN3103
CN2001
CN5302
CN7301
CN5303
CN5301
Jack
Display
Display
A/C head
Main
DVD
servo control
DVD
servo control
Main
Main
Fig.
No.
4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),
----------------------------------------
CN7191
CN7003
CN7004
CN1
CN501
CN502
CN5313
CN5311
Point Note
40
10
11
14
14
6
9
22
22
11
11
3.1.3 Disassembly procedure
Step/
Loc No.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Part Name
Top cover
Front panel assembly
(Display board assembly)
(Jack board assembly)
Mechanism assembly
(Drum assembly)
(Inertia plate)
(Roller arm assembly)
DVD unit
(Bracket)
Rear cover
Regulator board assembly
Main board assembly
Fig.
No.
3-1d
3-1a
3-1d
3-1b
3-1c
3-1d
3-1d
3-1d
3-1d
3-1d
Point Note
6(S1a)
4(L2a),5(L2b),2(S2a)
CN7104(WR2a),
CN3102(WR2b),
CN3103(WR2c),
CN2001(WR3a)
3(S3a),(S3b)
--------------------------
CN(WR3b)
(S3c),(S3d),(S3e)
--------------------------
4(L3a)
--------------------------
(P3a),(L3b)
3(S4a),(L4a),(S4b)
2(S4c),CN5302(CN501)
CN7301(CN502)
7(S5a),(S5b),3(L5a)
3(S6a)
CN5303(WR6a),
CN5301(WR6b)
2(S7a)
<Note 2a>
<Note 2b>
<Note 2a>
<Note 3a>
<Note 3b>
<Note 3c>
<Note 2a>
<Note 2a>
• Be careful not to damage the connector and wire etc. during
connection and disconnection.
• When connecting the flat wire to the connector, be careful with
the flat wire direction.
<Note 2b>
• When reattaching the Front panel assembly, make sure that
the door opener of the Side frame (R) is lowered in position prior to the reinstallation.
• When reattaching the Front panel assembly, pay careful 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 pa nel assembly, lift the Ca ssette
door slightly.
(1) (2) (3) (4) (5)
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
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, un locked,
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 correspond to those on the spare parts list.
(5) Adjustment information for installation
Door
opener
Side
frame(R)
Switch
knob
Switch
lever
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, b e sure to align
the phase of the Rotary encoder on the Main board assembly.
• When reattaching the Mechanism assembly, set the “Mechanism 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.
(No.YD002)1-11
<Note 3c>
• When reattaching the Drum assembly, secure the screws (S3c
to S3e) in the order of c, d, e.
Mechanism
assembly
(S3d)
(S3c)
(S3e)
(S3d)
(S3e)
Drum
assembly
<Note 3c>
<NOTE>
Attach the Drum assembly appropriately,
since the installation state of the Drum assembly
influences the FM WAVEFORM LINEARITY
greatly.
(S3c)
HOOK
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 video heads. Also take care not to damage the connectors.
Shaft
Motor
Video heads
Fig.3-1c
1-12 (No.YD002)
HOLD PART OF ROLLER ARM ASS'Y
WHILE ATTACHING INERTIA PLATE.
INERTIA PLATE SHOULD BE ATTACHED
SO AS TO SER SMALL DIAMETER OF
CENTRAL ROUND HOLE ABOVE.
POSITION ROLLER'S INSTALLATION
HOLE IN THE "A" PART.
INSERT ROLLER UNTIL THE "b"
PART OF ROLLER'S HOOK IOCK
UP TO THE "B" PART.
HITCH THE "c" PART OF SPRING
TO THE "C" PART.
(L3a)
"C"
"A"
Roller arm assembly
(P3a)"c"
(L3b)"b"
"B"
[3]Inertia plate
[3]Roller arm assembly
(S1a)
[1]Top cover
(S1a)
(S1a)
(L2b)
Cassete door
<Note2b>
[3] Mechanism assembly
(S3a)
3
(S7a)
[7]Main board assembly
(L2a)
(S3a)
1
f
(S2a)
(L2a)
[2]Front panel assembly
f
(S3c)
(S3d)
(S1a)
[3]Drum assembly
(S3a)
2
b
(S3b)
(L5a)
(S5a)
(S5a)
(S5b)
(S5a)
(S5a)
(S5a)
(S5a)
(S5a)
(S3e)
(S7a)
Terminal board assembly
2D Digital board assembly
<Phase alignment>
.
Accord the position of V gap on R.ENCORDER and PWB silk
.
Accord the position of Boss on R.ENCORDER and PWB silk
JS3001JS3001
(L5a)
(S4b)
(S4a)
[5]Rear cover
(L5a)
(S4a)
[4]DVD unit
(S4c)
CN7301
(S4a)
(L4a)
[4]Bracket
CN502
DVD servo control board assembly
CN501
(S6a)
CN5302
(S4c)
(S6a)
(S6a)
[6]Regulator board assembly
Jack board assembly
CN7191
(WR2a)
<Note2a>
(L2b)
Bottom side
Top side
(L2b)
(WR2b)
<Note2b>
Display board assembly
(WR2c)
<Note2b>
CN7004
CN7003
Jack board assembly
Fig.3-1d
CN7104
CN7191
(WR3b)
<Note2b>
CN2001
(WR3a)
<Note2b>
CN3102
CN5001
(WR6a)
<Note2b>
CN5303 CN5301
CN5311CN5313
(WR6b)
<Note2b>
CN3103
A
(No.YD002)1-13
3.2 Loading mechanism assembly
Projection of the tray
3.2.1 Removing the tray (See Figure 3-2a, Figure 3-2b, Figure 3-2c, Figure 3-2d, Figure 3-2e, Figure 3-2f)
(1) Push a of the slide ca m on the ho le in the right side of the
loading base by using a driver until it stops. (See Figure 32a.)
(2) The tray comes out. Pull the tray in a front direction until it
stops.
(3) Remove the two screws A attaching the slide bracket. (See
Figure 3-2b.)
(4) Tilt the tray in a directi on of the arrow around the point in
the left rear part of the tray. (See Figure 3-2c.)
(5) The rail of the tray is removed from b of the loading base.
Then, remove the tray upward. (See Figure 3-2d.)
Attaching the tray:
Engage c of the loading base to the projection of the tray while
tilting the tray to the left. Turn the tray in a direction of the arrow, and attach the slide bracket. (See Figure 3-2e.)
Note:
Prior to the procedure above, move the slide cam in a direction
of the arrow so that d of the slide cam can be inserted in e of
the tray. (See Figure 3-2f.)
Tray
The point in the left rear part
Fig.3-2c
Tray
Push
Slide cam part a
Slide bracket
A
Fig.3-2a
Fig.3-2b
A
Loading base
Tray
Loading base part b
Rail of the tray
Fig.3-2d
Projection of the tray
Loading base part c
Fig.3-2e
Part e
1-14 (No.YD002)
Part d
Slide cam
Fig.3-2f
3.2.2 Removing the traverse mechanism assembly (See Figure 3-2g)
f
Shaft
Reverse the loading mechanism assembly. Remove the four
screws B attaching the traverse mechanism assembly. Remove
the traverse mechanism assembly upward.
Loading mechanism assembly
3.2.3 Removing the elevator (See Figure 3-2h and Figure 3-2j)
• Prior to the following procedure, remove the traverse mechanism assembly.
(1) Remove the two arms of the el evator from the two parts f
by moving the arms in a direction of the arrow.
(2) Pull out the elevator in a rear direction.
Attaching the elevator:
Engage the two holes g to the two shafts on the front part of
the elevator. And then, attach the elevator.
B
B
B
B
Traverse mechanism assembly
Fig.3-2g
Elevator
Part f
Fig.3-2h
g
Slide cam
Elevator
Shaft
Fig.3-2j
(No.YD002)1-15
Part
g
3.2.4 Removing the loading motor (See Figure 3-2k and Figure 3-2l)
• Prior to the following procedure, remove the tray, the traverse
mechanism assembly, and the elevator.
(1) Remove the belt from the pulley.
(2) Remove two screws C attaching the loading motor.
(3) Remove two solders h on the switch board.
Switch board
Pulley
Part h
Belt
Pulley
C
Fig.3-2k
Loading base
Slide cam
C
Loading motor
3.3 Traverse mechanism assembly
3.3.1 Removing the pickup (See Figure 3-3a, Figure 3-3b)
• Prior to the following procedure, remove the traverse mechanism assembly.
(1) Remove one screw D attaching the plate.
(2) Remove the plate and the leaf spring.
(3) Lift i of the shaft 1, and pull out the shaft 1 from j.
(4) Remove k of the pickup from the shaft 2.
Attaching the pickup:
(1) Engage k of the pickup to the shaft 2.
(2) Insert the shaft 1 in j, and attach the shaft 1 to i.
(3) Attach the leaf spring, and then a ttach the p late. Fix the
leaf spring and the plate by using the screw D.
Fig.3-2l
D
Leaf spring
Plate
Fig.3-3a
Shaft 2
Part k
Part j
1-16 (No.YD002)
Shaft 1
Part i
Fig.3-3b
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 performance 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
: Used --- : Not used
Mechanism
compatibility
adjustment
Roller driver
Jig RCU ---
Back tension cassette gauge ---
Alignment tape(MHPE) ---
Alignment tape(MHPE-L)
Alignment tape(MHP-L)
Roller driver
PTU94002
Jig RCU
PTU94023B
---
Back tension cassette gauge
Electrical
adjustment
---
PUJ48076-2
4.1.4 Color (colour) bar signal,Color (colour) bar pattern
Colour bar signal [PAL]
White(100%)
White(75%)
0.7 V
1V
0.3 V
Horizontal sync
Yellow
Cyan
Green
Magenta
Red
VU
V(R-Y)
U(B-Y)
Blue
Burst
Colour bar pattern [PAL]
(75%)
Cyan
White
Yellow
0.3 V
V
White
U Black
100%
Green
Magenta
Red
Blue
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 VCR to the
Jig RCU mode. (See "SECTION 2 SPECIFIC SERVICE INSTRUCTIONS")
Jig RCU
[Data transmitting method]
Depress the " "( 3 ) button
after the data code is set.
CUSTOM CODE
43: A CODE
DATA CODE
INITIAL MODE
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 listed below can be set as desired.
If the VCR is not equipped with the functions detailed below ,
setup is not required.
AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.
PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL
VIDEO STABILIZER OFF
TBC ON
Digital 3R ON
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK OFF
OFF
Alignment tape
(SP, stairstep, PAL)
MHPE
CD-DA test disc
CTS-1000
Alignment tape
(LP, stairstep, PAL)
MHPE-L
DVD test disc
VT-501
4.1.6 Manual tracking mode (Auto tracking ON/OFF) set-
ting
(1) In order to set to the manual tracking mode during ta pe
playback, press the “SP/EP(LP)”button on the remote control unit.
• Each press of the button switches the auto tracking ON
or OFF.
• When the manual tracking mode is set, the tracking is
placed at the center position.
(2) Press “channel +/-” to adjust the tracking manually.
(No.YD002)1-17
4.1.7 EVR Adjustment
Some of the electrical adjustments require the adjustment performed 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 adju st-
ment mode, use the Jig RCU or the remote controller
having numeric keypad with which a numeric code can
be directly input.
The remote control code of the Jig RCU corresponds to
each of the digit keys on the remote controller as follows.
Digit-key0123456789
Code 20 21 22 23 24 25 26 27 28 29
• 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 th at the
FDP indication is changed to the EVR mode, as shown
below.
FDP
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 replaced the A/C head, drum assembly or any pa rt of the
tape transport system.
• To prevent damaging the alignment tape in the compatibil-
ity adjustment, prepare a cassette tape (for self-recording/
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.
Signal (A) • Back tension cassette gauge [PUJ48076-2]
Mode (B1)
Adjustment part (F) • Adjust pin [Mechansim assembly]
Specified value (G) • 25 - 51 gfcm (2.45 - 5 x 10
(B2)
•PB
• Eject end
-
3
Nm)
(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 th at th e ti p of
the tension arm is aligned with the stamping (b) on
the main deck.
d) Rotate the reel di sk (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.
1-18 (No.YD002)
TENSION ARM
Stamping(b)
OK
ADJUST PIN
CONTROL PLATE
Stamping(a)
NG
Fig.4-2a
4.2.2 FM waveform linearity
Signal (A1)
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]
• Alignment tape(SP, stairstep, PAL) [MHPE]
(A2)
• Alignment tape(LP, stairstep, PAL) [MHPE-L]
(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 th e 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).
Improper
(a)
GUIDE ROLLER
(b)
GUIDE POLE
Proper
Fig.4-2b
Proper waveform variation
Improper waveform variation
A
C
Up Down
B
D
Roller driver
Guide roller
(supply side)
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].)
Signal (A) • Alignment tape(SP, stairstep, PAL) [MHPE]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • A/C head [Mechanism assembly]
Specified value (G) • Maximum waveform
• AUDIO OUT terminal
(D2)
• TP4001 (CTL. P)
(1) Play back the alignment tape (A).
(2) Apply the external trigger signal to D.FF (E), to observe the
AUDIO OUT waveform and Control pulse waveform at the
measuring points (D1) and (D2) in the ALT mode.
(3) Set the VCR to the manual tracking mode.
(4) Adjust the AUDIO OUT waveform and Control pulse 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.
Head base
(2)
(1)
AUDIO OUT
A/C head
CTL. P
(3)
Fig.4-2d
(No.YD002)1-19
4.2.4 A/C head phase (X-value)
Signal (A1)
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]
• Alignment tape(SP, stairstep, PAL) [MHPE]
(A2)
• Alignment tape(LP,stairstep,PAL) [MHPE-L]
(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.
To the drum
Toward the capstan
Toward the drum
A/C head
Screw (5)
Roller driver
Screw (4)
Head base
To the capstan
Fig.4-2e
Alignment tape
[SP, stairstep]
played with the
SP head
Waveform output
X-value adjustment point
Drum side Control head position Capstan side
Alignment tape
[EP(LP), stairstep]
played with the
EP(LP) head
Maximum
Fig.4-2f
4.3 Electrical adjustment [VHS SECTION]
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 measuring instruments as described in the following electrical adjustment procedures. After this, proceed to the repair,
replacement and/or adjustment. If the required measuring instruments are not available in the field, do not change the adjustment parts (variable resistor, etc.) carelessly.
4.3.1 Servo circuit
4.3.1.1 Switching point
Signal (A1)
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • VIDEO OUT terminal (75 ohm terminated)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • Jig RCU: Code “5A”
Specified value (G) • 6.5±0.5H (VHS models)
Adjustment tool (H) • Jig RCU [PTU94023B]
• Stairstep signal
(A2)
• Alignment tape(LP,stairstep,PAL) [MHPE-L]
• TP106 (PB. FM)
• 7.5±0.5H (S-VHS models)
(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 mea-
suring 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) a gain, confirm that the
switching point is the specified value (G).
Trigger point
Switching point
V.sync
V. rate
Fig.4-3a Switching point
4.3.1.2 Slow tracking preset
Signal (A1)
Mode (B1)
Measuring point (D) • TV-Monitor
Adjustment part (F) • Jig RCU: Code “71”or “72”
Specified value (G) • minimum noise
Adjustment tool (H) • Jig RCU [PTU94023B]
• Ext. input
(A2)
• Color (colour) bar signal [PAL]
• VHS SP
(B2)
•VHS LP
1-20 (No.YD002)
(1) Record the signal (A2) in the mode (B1), and play back
the recorded signal.
(2) Set the VCR to the manual tracking mode.
(3) Set the VCR to the FWD slow (+1/6x) mode.
(4) Transmit the code (F) from the Jig RCU to adjust so that the
noise bar becomes the specified value (G) on the TV
monitor in the slow mode.
(5) Set the VCR to the Stop mode.
(6) Confirm that the noise bar is (G) on the TV monitor in the
slow mode.
(7) Repeat steps (3) to (6) in the REV slow (-1/6x) mode.
(8) Repeat steps (1) to (7) in the mode (B2).
Note:
• For FWD slow (+1/6x) playback, transmit the code “08”
from the Jig RCU to enter the slow playback mode, and
transmit the code “D0”for REV slow (-1/6x) mode.
4.3.2 Video circuit
4.3.2.1 EE Y/PB Y (S-VHS) level
Signal (A1)
Mode (B1)
Equipment (C) • Oscilloscope
Measuring point (D) • Y OUT terminal
EVR mode
EVR address
Specified value (G) • 1.00 ± 0.05 Vp-p (75 ohm terminated)
Adjustment tool (H) • Jig RCU [PTU94023B]
• Ext. S-input
(A2)
• Ext. input
(A3)
• Color (colour) bar signal [PAL]
• EE SP
(B2)
•S-VHS SP
(B3)
•VHS SP
(F1)
• Jig code “57”
(F2)
• A : 11
(F3)
• Jig code “21” twice
(F4)
• Jig code “18” or “19” (Channel +/-)
(1) Input the signal (A3) from the input point (A1).
(2) Set the VCR to the mode (B1).
(3) Observe the Y OUT waveform at the measuring point (D).
(4) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(5) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(6) Transmit the code (F4) from the Jig RCU to adj ust so that
the Y level of the Y OUT waveform becomes the specified
value (G).
(7) Release the EVR mode of the VCR by transmitting the
code (F1) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(8) Input the signal (A3) from the input point (A2).
(9) Repeat steps (3) to (7) in the mode (B1).
(10) Record the signal (A3) in the mode (B2), and play back the
recorded signal.
(11) Set the VCR to the manual tracking mode.
(12) Repeat steps (3) to (7) in the mode (B2).
(13) Record the signal (A3) in the mode (B3), and play back the
recorded signal.
(14) Set the VCR to the manual tracking mode.
(15) Repeat steps (3) to (7) in the mode (B3).
4.3.3 Syscon circuit
Notes:
• When perform this adjustment, remove the Mechanism
assembly.
4.3.3.1 Timer clock
Signal (A1) • No signal
Mode (B) • EE
Equipment (C) • Frequency counter
Measuring point (D1)
Adjustment part (F) • C3025 (TIMER CLOCK)
Specified value (G) • 1024.008 ± 0.001 Hz
• IC3001 pin 44
• IC3001 pin 103
(D2)
• C3054 + and -
(D3)
(976.5549 ± 0.0010 usec)
(1) Connect the frequency counter to the measuri ng 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).
4.3.4 Audio circuit [S-VHS models]
Notes:
• GND (Ground) should be taken from the Tuner shield
case.
4.3.4.1 Audio REC FM
Signal (A1)
Mode (B) • S-VHS LP
Equipment (C) • Oscilloscope
Measuring point (D) • TP2253 (A. PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (H) • VR2251 (REC. FM)
Specified value (G1)
• Ext. input
• Audio: No signal
(A2)
• Video: Color (colour) bar signal [PAL]
(A3)
• 600 ± 100 mVp-p
(G2)
• More than 400 mVp-p
(1) Apply the external trigger signal to D.FF (E) to observe the
Audio PB FM waveform at the measuring point (D).
(2) Record the signal (A3) with no audio signal input in the
mode (B), and play back the recorded signal.
(3) Set the VCR to the manual tracking mode.
(4) If the A.PB FM level is not within the specified value (G1),
perform the adjustment in a following procedure.
(5) Adjust the adjustment part(F) so that the A. PB FM level of
the higher channel level becomes the specified value(G1).
(Adjust before recording, then confirm it by playing back.)
(6) If specified value(G1) is not obtai ned, adjust the Adjust-
ment part(F) so that the waveform level of the lower chan-
nel level becomes the specified value(G2).(Adjust before
recording, then confirm it by playing back.)
H. rate
Fig.4-3b EE Y/PB Y lebel
Y level
Specified
value (G2)
Specified
value (G1)
V. rate
Fig.4-3c Audio REC FM
(No.YD002)1-21
4.4 Electrical adjustment (DVD SECTION)
4.4.1 Test mode setting method
(1) Press POWER button then press VCR/DVD repeatedly so that the DVD indicatorlights up.
(2) Press the POWER button again to set the stand-by mode.
(3) Transmit the code "FA" from the Jig RCU.
(4) The FDP shows the test mode content in the form of "∗ 0 ∗".
(5) To release test mode, press "POWER" key of the front panel.
(6) Each pressing of "SET UP MENU" key of the remote controller in test mode changes the mode as follows.
**
Becames test mode
Version of firmware
VCRCSDTV
D-S-VHS
CH
FDP becames all lighting
Check mode
Not used
4.4.2 Method of displaying versio n of firmware
(1) Set the main body at test mode.
(2) Press "SET UP MENU" key of the remote controller once. Then, version number and alphabetical letter of the system controller
and the back end are displayed in the FL display as follows:
FDP (Example)
07_19_16
System controller
4.4.3 Initialization method
Please initialize according to the following procedures in the following case:
• Just after you upgrade the firmware.
• After you confirm the symptoms that a customer points out. First Initialize, and then confirm whether the symptoms are improved or
not.
• After servicing, before returning the main body to a customer. (Initialized main body should be returned to a customer.)
(1) Set the main body at test mode.
(2) Press "PAUSE" key of the front panel or transmit the code "6F" from the Jig RCU.
(3) When initialization is completed, the FDP chan ges from "∗0" to "∗00".(T he left "0 " o f "00" is not a lways "0". It shows pa rameter
adjustment status.)
4.4.4 All-initialization method
Please perform all-initialization according to the following procedures in the following case:
• Just after you exchange the pick-up.
• Just after you exchange the spindle motor.
• Just after you exchange the traverse mechanism base.
NOTE:
Please perform all-initialization when you exchange the parts above and also when you remove the parts above.
• Just after the flap adjustment of the pick-up guide shaft
(1) Set the main body at test mode.
(2) Press the "REVERSE SKIP/INDEX ()" key of the remote controller for more than 2 seconds.
(3) When all-initialization is completed, the FDP changes from "∗0" to "∗33".
NOTE:
After all-initialization, be sure to perform optimization adjustment of Front End parameter.
Back end
Front end
1-22 (No.YD002)
4.4.5 Optimization adjustment of Front End parameter
Adjustment to optimize Front End parameter must be performed in each mechanism assemb ly of this model for high-speed starting.Please perform optimization according to the following p rocedures just after all-initialization i s completed and when FL display
shows anything except "∗0" (For example when FDP shows "∗1", "∗2", and "∗3") at test mode.
(1) Press "POWER" button of the front panel to tu rn the main body on (not to set the main body at test mode).
(2) Insert the test disc VT-501 or commercial dual-layer DVD software.
(3) Remove the disc when the FL display changes from "READ" to disc information.
(4) Perform the same procedures as in (2) and (3) above by using the test disc CTS-1000 or commercial CD-DA software.
(5) Set the main body at test mode, and check that the FDP shows "∗0".
NOTE:
Status of this adjustment can be judged by the number displayed at test mode as follows:
DVD adjustment CD adjustment FDP at test mode
Adjusted Adjusted ∗0
Not adjusted Adjusted ∗1
Adjusted Not adjusted ∗2
Not adjusted Not adjusted ∗3
NOTE:
As for a disc used for adjustment,
• Disc should be mounted. ("Mounting" means to display "READ" after the disc is inserted and then display the disc information.) Disc need not be played.
• If you do not have test disc either VT-501 (DVD) or CTS-1000 (CD-DA), use a commercial disc (for DVD, dual-layer software) after seeing and checking that the di sc is neit her curved nor foreseen that it may shake at the time of playback.If you
use a disc with bad features, starting time may be slow or disc may not be read.
4.4.6 Display of current value of laser
(1) Set the main body at test mode.
(2) Press "SET UP MENU" key of the remote controller three times. Then, FDP is displayed "CHECK".
(3) The laser current val ue can be switche d between the val ue of CD and that of DVD by pressing the fo llowing key of the remote
controller.
FDP (Example)
2530
The number shown in the FDP shows mA of current value of laser.The first two numbers ("25" in "2530") sho ws current value
of laser at the time of adjustment after the latest all-initialization, 25mA in this example.The last two numbers ("30" in "2530")
shows the present current value of laser, 30mA in this example.The first two numbers ("25" in "2530") usually shows current
value of laser at the time of shipment, so you can see how the product has been deteriorated by comparing the first two numbers
("25" in "2530") and the last two numbers ("30" in "2530").
CD:
The laser current value of 65 mA or less is normal.The laser current value of over 66 mA is not normal. Laser diode of the
pickup has been deteriorated.
DVD:
The laser current value of 80 mA or less is normal.The laser current value of over 81 mA is not normal. Laser diode of the
pickup has been deteriorated.
To return to test mode, press "STOP" button of the front panel.
****
Remote controller "4" key --- Laser of CD
Remote controller "5" key --- Laser of DVD
(No.YD002)1-23
4.4.7 Flap adjustment of the pick-up guide shaft
Please perform flap adjustment of the pick-up guide shaft in the following case:
• Just after you exchange the pick-up.
• Just after you exchange the spindle motor.
• Just after you exchange the traverse mechanism base.
NOTE:
Please perform flap adjustment of the pick-up guide shaft when you exchange the parts above and also when you remove the
parts above.
• When the reading accuracy of the signal is bad (There is a block noise in the screen, Screen stops in the outer circumference of a
disc, etc.)
4.4.7.1 Tool for adjustment
* The screwdriver
good on the market
* Test disc
part number : VT-501
*Stud
part number : JIGXVS40 (Note: One of the four studs is not used here.)
* Extension cord
part number : EXTXV521CB
XV-521 CN601
MAIN CONNECT
XV-521 CN503
CONT CONNECT
CN706 XV-521
CONT CONNECT
MAIN CONNECT
CN501 XV-521
CN701 XV-521
XV-521 CN502
CONT CONNECT
Used two set of this part.
MAIN CONNECT
1-24 (No.YD002)
4.4.7.2 Preparation for adjustment
(1) Remove the DVD unit.(Refer to the SECTION 3 Removing the major parts)
(2) Connect a extention cord between CN502
of DVD servo control board assembly and CN7301 of Main board assembly. (See
Fig.4-4a)
(3) Connect a extention cord between CN501
of DVD servo control board assembly and CN5302 of Regulator board assembly. (See
Fig.4-4a)
(4) Remove the DVD servo control board assembly attach ed the DVD unit.
(5) Three stud is attached in a DVD unit. (See Fig.4-4b)
NOTE:
The connector of an extended code (right or reverse) since direction of which is also connectable, be careful of the direction which a
relay wire inserts enough It will become the cause of failure if especially a Regulator board side is mistaken.
Stud
DVD unit
CN502
CN501
DVD servo
control board
assembly
Main board
assembly
CN7301 CN7302
Regulator board
assembly
Fig.4-4a Fig.4-4b
4.4.7.3 Adjustment
(1) Set the main body at test mode.
(2) Press the "SET UP MENU" key of the remote controller three times, and the FDP is displayed "CHECK".
(3) Insert a test disc (VT-501), and press the "P LAY" butto n of the front panel.
(4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FDP is displays a jitter value.
(5) Turn the adjustment screws on the underside of the traverse mechanism with screw driver until the maximum jitter value is dis-
played on the FDP. (In this model, a bigger jitter value means a better result.)
NOTE:
• Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.
• Please be sure to perform "all-initialization" and "optimization adjustment of front end parameter" after adjusting.
Loading mechanism assembly
Screw a
Screw b
FDP (Example)
1241
****
Traverse mechanism assembly
POINT:
Turn the adjustment screws a and b
to the same angle in the right direction.
Screw c
And turn the adjustment screws a and b
to the same angle in the left direction.
Then, turn the screws a and b in either
the right or the left direction to increase
the number of jitter.
Don't turn the adjustment screw c.
Remote controller "6" key-Jitter value
(No.YD002)1-25
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 di sassembly procedure of the VCR and per-
form the disassembly of the major parts before removing
the mechanism assembly. (See Fig. 5-1a)
Fig.5-1a
Tension arm assembly
Pole base assembly
Pinch roller arm assembly
(3) Unload the pole base assembly by man ually 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 tension arm assembly free from tension, pull out the tape
on the pole base assembly. Take the spring(a) of the
pinch roller arm assembly off the hook, and detach it
from the tape.
(4) Remove the screw (a) of the side frame (L/R).
(5) Hold the slack tape and cassette cover togethe r, lift the
cassette tape, top frame, cassette holder and side frames
(L, R) together from the rear and remove them by dis-engaging the hooks (a) and (b).
Screw(a)
Cassette tape
Hook(a)
Cassette holder
Top frame
Side frame(R)
Screw(a)
Spring(a)
Direction of unloading
Fig.5-1b
Side frame(L)
Hook(b)
Fig.5-1c
(6) Take up the slack of the tape into the casse tte. 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.
(1) Unplug the power cord plug from the power outlet.
(2) Remove the top cover and front panel assembly .
(Refer to the disassembly procedure and perform th e disassembly of the major parts before removing)
(3) Turn the Middle gear (a) by hand to open the disk tray.(See
Fig. 5-2a)
DVD unit
Middle gear (a)
1-26 (No.YD002)
Unloading
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 VCR and the mechanism o f
each emergency to be shown both on the display and as OSD information.
When using the emergency function, it is required to set the VCR
to the Jig RCU mode.
Jig RCU
[Data transmitting method]
Depress the " " ( 3 ) button
after the data code is set.
CUSTOM CODE
43: A CODE
DATA CODE
INITIAL 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 "59" from the Jig RCU.
Note:
• The EMG detail information <1><2> show the informa-
tion on the latest EMG.
It becomes “ - - : - - : - - ” when there is no latest EMG
record.
0: 00
E: **
1E: **
1: *1
2: *2
3: 34
4: *5
5: *6
6: *7
7: *8
8: *9
9: *10
Normal display
EMG content display (Latest) See 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]
EMG display of 7 FDP display model
Fig.5-3b
EMG display of FDP display mode
(1) Transmit the code “59” from the Jig RCU.
The FDP shows the EMG content in the form of “E:**:**”.
<Example 1> E : 01
Latest EMG
<Example 2> E : - -
No EMG record
(2) Transmit the code “59” from the Jig RCU again.
The FDP shows the EMG detail information <1> in the form
of “ *1: *2 : 34 ”.
*1 : Deck operation mode at the moment of EMG
*2 : Mechanism operation mode at the moment of EMG
3- : Mechanism sensor information at the moment of EMG
-4 : Mechanism mode positio n at the moment of EMG
(3) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <2> in the form
of “ *5 : *6 : *7 ”.
*5 : Type of the cassette tape in use <1> .
*6 : Winding position of the cassette tape in use
*7 : Type of the cassette tape in use <2> (Winding area)
(4) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <3> in the form
of “*8 : *9 : *10”.
*8 : Previous deck operation mode at the moment of EMG
*9 : The deck operation mode of the one before the last at
the moment of EMG
*10: The deck operation mode of the one prior to one
above at the moment of EMG
(5) Transmit the code “59” from the Jig RCU once again to re-
set the display.
(No.YD002)1-27
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