Page 1
SERVICE MANUAL
CD RECEIVER
MA070B20053
KD-G801,KD-G807
KD-G801
Area suffix
KD-G801
SOUND
ATT
U
SOURCE
F
R
D
VOL
VOL
KD-G807
SOUND
ATT
U
SOURCE
F
R
D
VOL
VOL
01
8
-G
D
K
807
-G
D
K
E ----------- Continental Europe
EX --------------- Central Europe
KD-G807
Area suffix
EE --------- Russian Federation
KD-G801 EE/EX KD-G807 E
STEERING CABLE
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.MA070B
2005/3
Page 2
SPECIFICATION
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 50 W per channel
Rear 50 W per channel
Continuous Power Output
(RMS)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 120 Hz)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.0 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Frequency Range FM 87.5 MHz to 108.0 MHz
[FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
[MW Tuner] Sensitivity 20 µV
[LW Tuner] Sensitivity 50 µV
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 decoding format MPEG1/2 Audio Layer 3 Max. Bit Rate 320 Kbps
WMA (Windows Media Audio) decoding format Max. Bit Rate 192 Kbps
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System: Negative ground
Allowable Operating Temperature 0ºC to +40ºC
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 159 mm
Mass (approx.) 1.5 kg (excluding accessories)
Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%
total harmonic distortion.
Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%
total harmonic distortion.
Mid ±12 dB
High ±12 dB (8 kHz, 10 kHz, 12 kHz, 15 kHz)
TUNER SECTION
FM1,2 (for KD-G807) 87.5 MHz to 108.0 MHz
FM3 (for KD-G807) 65.0 MHz to 74.0 MHz
AM (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 kHz
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 12 mm
Design and specifications are subject to change without notice.
1-2 (No.MA070B)
Page 3
1.1 Safety Precautions
SECTION 1
PRECAUTION
!
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
(No.MA070B)1-3
Page 4
1.2 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.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
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.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron plate
(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.
1.3 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) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the pickup unit.
(If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.
Short-circuit point
(Soldering)
Flexible wire
1-4 (No.MA070B)
Pickup
Page 5
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 LABELS
WARNING LABEL
CAUTION : Visible and Invisible
CLASS 1
LASER PRODUCT
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MA070B)1-5
Page 6
SPECIFIC SERVICE INSTRUCTIONS
2.1 HOW TO IDENTIFY MODELS
2.1.1 NAME PLATE (as same as KD-G807)
Discernment sign
SECTION 2
1-6 (No.MA070B)
Page 7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the front panel assembly
(See Fig.1)
(1) Push the detach button in the lower right part of the front
panel assembly.
(2) Remove the front panel assembly.
3.1.2 Removing the heat sink
(See Fig.2)
(1) From the left side of the main body, remove the two screws
A and three screws B attaching the heat sink.
Reference:
Remove the front panel assembly as required.
Front panel assembly
Detach button
Fig.1
AAB
Heat sink
Fig.2
(No.MA070B)1-7
Page 8
3.1.3 Removing the top chassis assembly
(See Figs.3 to 6)
• Prior to performing the following procedures, remove the front
panel assembly and heat sink.
(1) From the bottom side of the main body, remove the two
screws C attaching the top chassis assembly to the bottom
chassis assembly. (See Fig.3.)
(2) From the both and rear sides of the main body, remove the
four screws D attaching the top chassis assembly to the
bottom chassis assembly. (See Figs.4 to 6.)
(3) Lift the top chassis assembly in the direction of the arrow,
disconnect the connector CN501
trol board from the connector CN101
(See Fig.5.)
(4) Take out the top chassis assembly from the bottom chassis
assembly.
on the mechanism con-
on the main board.
Bottom chassis assembly
C
C
Top chassis assembly
Fig.3
Top chassis assembly
Bottom chassis assembly
Mechanism control board
Top chassis assembly
Main board
Bottom chassis assembly
D
Fig.4
CN501
D
CN101
Fig.5
Top chassis assembly
D
D
1-8 (No.MA070B)
Bottom chassis assembly
Fig.6
Page 9
3.1.4 Removing the front chassis
(See Figs.7 and 8)
• Prior to performing the following procedure, remove the front
panel assembly, heat sink and top chassis assembly.
(1) From the both sides of the top chassis assembly, remove
the two screws E attaching the front chassis.
3.1.5 Removing the mechanism control board
(See Fig.9)
• Prior to performing the following procedures, remove the front
panel assembly, heat sink and top chassis assembly.
(1) Disconnect the card wire from the connector CN601
mechanism control board.
(2) Remove the five screws F attaching the mechanism control
board.
(3) Release the joints a and b, remove the mechanism control
board.
on the
Top chassis assembly
E
Front chassis
Mechanism control board
F
E
Front chassis
Fig.7
Top chassis assembly
Fig.8
CN601
F
a
b
F
Fig.9
(No.MA070B)1-9
Page 10
3.1.6 Removing the CD mechanism assembly
(See Fig.10)
• Prior to performing the following procedures, remove the front
panel assembly, heat sink and top chassis assembly.
Reference:
Remove the mechanism control board as required.
(1) From the inside of the top chassis assembly, remove the
three screws G attaching the CD mechanism assembly.
(2) Take out the CD mechanism assembly from the top chas-
sis.
Top chassis
G
CD mechanism assembly
3.1.7 Removing the main board
(See Figs.11 and 12)
• Prior to performing the following procedures, remove the front
panel assembly, heat sink and top chassis assembly.
(1) From the rear side of the bottom chassis assembly, remove
the two screws H attaching the rear bracket to the bottom
chassis assembly. (See Fig.11.)
(2) From the top side of the bottom chassis assembly, remove
the two screws J attaching the main board to the bottom
chassis assembly. (See Fig.12.)
(3) Release the stopper of the connector CN702
board in an upward direction, disconnect the card wire from
the connector CN702
(4) Disconnect the wire from the connector of the gear bracket
unit. (See Fig.12.)
(5) Disconnect the wire from the connector CN951
board. (See Fig.12.)
Reference:
After connecting the wires, fix the wires with the wire
holders.
(6) Take out the main board from the bottom chassis assem-
bly.
. (See Fig.12.)
on the main
on the main
G
H
Gear bracket unit
Connector
Wire holders
Fig.10
Fig.11
Card wire
CN702
G
Rear bracket
Bottom chassis assembly
Stopper
Bottom chassis assembly
J
1-10 (No.MA070B)
J
Main board
CN951
Fig.12
Wires
Page 11
3.1.8 Removing the rear bracket
r
(See Fig.13)
• Prior to performing the following procedures, remove the front
panel assembly, heat sink, top chassis assembly and main
board.
(1) From the rear side of the main board, remove the cables
from the rear bracket in the direction of the arrow.
(2) Remove the two screw K, screw L and screw M attaching
the rear bracket to the main board.
Reference:
After attaching the rear bracket to the main board, pass the cables through the wire holder and insert them into the slots of
the rear bracket.
Cable (KD-G801)
Rear bracket
K
Cable
Main board
Wire holde
Slots
3.1.9 Removing the front door mechanism assembly
(See Fig.14.)
• Prior to performing the following procedures, remove the front
panel assembly, heat sink, top chassis assembly and main
board.
(1) From the top side of the bottom chassis assembly, remove
the screw N attaching the FPC guide to the bottom chassis.
(2) Remove the five screws P attaching the gear bracket unit
to the bottom chassis.
Reference:
When attaching the screws N and P, apply a locking
agent them.
(3) Take out the gear bracket unit from the bottom chassis.
Bottom chassis
P
L M
FPC guide
Rear bracket
Fig.13
Gear bracket unit
P
N
Fig.14
(No.MA070B)1-11
Page 12
3.1.10 Removing the front board
(See Figs.15 to 17)
• Prior to performing the following procedures, remove the front
panel assembly.
(1) From the back side of the front panel assembly, remove the
four screws Q attaching the rear cover assembly to the
front panel assembly. (See Fig.15.)
(2) Release the twelve joints c of the front panel assembly and
remove the rear cover assembly. (See Fig.16.)
(3) Take out the front board from the front panel assembly.
(See Fig.17.)
Note:
When removing the rear cover assembly and front board, be
careful not to lose the comp. spring. (See Fig.17.)
Q
joints c
Rear cover assembly
Fig.15
Rear cover assembly
Q
Q
joints c
joints c
Front panel assembly
Comp. spring
joints c
Fig.16
Front board
Fig.17
1-12 (No.MA070B)
Page 13
3.2 CD Mechanism section
A
3.2.1 Removing the top cover
(See Figs.1 and 2)
(1) Remove the four screws A on the both side of the body.
(2) Lift the front side of the top cover and move the top cover
backward to release the two joints a.
Top cover
Joints a
A
Joints a
A
Fig.1
Fig.2
Top cover
(No.MA070B)1-13
Page 14
3.2.2 Removing the connector board
(See Figs.3 to 5)
CAUTION:
Before disconnecting the flexible wire from the pickup, solder
the short-circuit point on the pickup. No observance of this instruction may cause damage of the pickup.
(1) Remove the screw B fixing the connector board.
(2) Solder the short-circuit point on the pickup.
(3) Disconnect the flexible wire from the pickup.
(4) Move the connector board in the direction of the arrow to
release the two joints b.
(5) Unsolder the wires on the connector board if necessary.
CAUTION:
Unsolder the short-circuit point after reassembling.
B
Connector board
Flexible wire
Wires
Joints b
Short-circuit point
Fig.3
Short-circuit point
(Soldering)
Pickup
Flexible wire
Frame
Pickup
Fig.4
B
Connector board
Fig.5
1-14 (No.MA070B)
Page 15
3.2.3 Removing the DET switch
(See Figs.6 and 7)
(1) Extend the two tabs c of the feed sw. holder and pull out
the switch.
(2) Unsolder the DET switch wire if necessary.
DET
switch
Connector
board
Pickup
Fig.6
DET switch
Tab c
Tab c
DET switch wire
Feed sw. holder
Fig.7
(No.MA070B)1-15
Page 16
3.2.4 Removing the chassis unit
r
(See Figs.8 and 9)
• Prior to performing the following procedure, remove the top
cover and connector board.
(1) Remove the two suspension springs (L) and (R) attaching
the chassis unit to the frame.
CAUTION:
• The shape of the suspension spring (L) and (R) are different. Handle them with care.
• When reassembling, make sure that the three shafts
on the underside of the chassis unit are inserted to the
dampers certainly.
Suspension spring (R)
Chassis unit
Suspension spring (L)
Frame
Suspension spring (R)
Chassis unit
Shafts
Damper
Damper
Suspension spring (L)
Fig.8
Shaft
Dampe
Frame
Fig.9
1-16 (No.MA070B)
Page 17
3.2.5 Removing the clamper assembly
(See Figs.10 and 11)
• Prior to performing the following procedure, remove the top
cover.
(1) Remove the clamper arm spring.
(2) Move the clamper assembly in the direction of the arrow to
release the two joints d.
Clamper arm
spring
Joint d
Joint d
Clamper assembly
Fig.10
Clamper arm spring
Chassis rivet
assembly
Joint d
Clamper assembly
Chassis rivet assembly
Joint d
Fig.11
(No.MA070B)1-17
Page 18
3.2.6 Removing the loading / feed motor assembly
(See Figs.12 and 13)
• Prior to performing the following procedure, remove the top
cover, connector board and chassis unit.
(1) Remove the screw C and move the loading / feed motor as-
sembly in the direction of the arrow to remove it from the
chassis rivet assembly.
(2) Disconnect the wire from the loading / feed motor assembly
if necessary.
CAUTION:
When reassembling, connect the wire from the loading /
feed motor assembly to the flame as shown in Fig.12.
Loading / feed motor assembly
Fig.12
Loading / feed motor assembly
C
Fig.13
1-18 (No.MA070B)
Page 19
3.2.7 Removing the pickup unit
r
(See Figs.14 to 18)
• Prior to performing the following procedure, remove the top
cover, connector board and chassis unit.
(1) Remove the screw D and pull out the pu. shaft holder from
the pu. shaft.
(2) Remove the screw E attaching the feed sw. holder.
(3) Move the part e of the pickup unit upward with the pu. shaft
and the feed sw. holder, then release the joint f of the feed
sw. holder in the direction of the arrow. The joint g of the
pickup unit and the feed rack is released, and the feed sw.
holder comes off.
(4) Remove the pu. shaft from the pickup unit.
(5) Remove the screw F attaching the feed rack to the pickup
unit.
3.2.8 Reattaching the pickup unit
(See Figs.14 to 17)
(1) Reattach the feed rack to the pickup unit using the screw F.
(2) Reattach the feed sw. holder to the feed rack while setting
the joint g to the slot of the feed rack and setting the joint f
of the feed rack to the switch of the feed sw. holder correctly.
(3) As the feed sw. holder is temporarily attached to the pickup
unit, set to the gear of the joint g and to the bending part of
the chassis (joint h) at a time.
CAUTION:
Make sure that the part i on the underside of the feed
rack is certainly inserted to the slot j of the change lock
lever.
(4) Reattach the feed sw. holder using the screw E.
(5) Reattach the pu. shaft to the pickup unit. Reattach the pu.
shaft holder to the pu. shaft using the screw D.
Part e
Joint g
Feed sw. holder
Feed rack
Part i
E
Slot j
F
Fig.15
Pu. shaft
Pickup unit
Joint f
Joint h
Fig.16
Feed rack
Pickup unit
Feed sw. holder
D
Pu. shaft holde
Joint f
Pu. shaft
D
Pu. shaft holder
Feed sw. holder
Pickup unit
Fig.14
Part e
E
Joint g
Pickup unit
Feed rack
Fig.17
Pickup unit
Joint g
Joint f
Feed sw. holder
Fig.18
(No.MA070B)1-19
Page 20
3.2.9 Removing the trigger arm
r
(See Figs.19 and 20)
• Prior to performing the following procedure, remove the top
cover, connector board and clamper unit.
(1) Turn the trigger arm in the direction of the arrow to release
the joint k and pull out upward.
CAUTION:
When reassembling, insert the part m and n of the trigger
arm into the part p and q at the slot of the chassis rivet
assembly respectively and join the joint k at a time.
Chassis rivet assembly
Trigger arm
Chassis
rivet
assembly
Joint k
Trigger arm
Fig.19
Part p
Part q
Part m
Part n
3.2.10 Removing the top plate assembly
(See Fig.21)
• Prior to performing the following procedure, remove the top
cover, connector board, chassis unit, and clamper assembly.
(1) Remove the screw H.
(2) Move the top plate assembly in the direction of the arrow to
release the two joints r.
(3) Unsolder the wire marked s if necessary.
H
Fig.20
Top plate assembly
Joints
s
Fig.21
1-20 (No.MA070B)
Page 21
3.2.11 Removing the mode sw. / select lock arm
(See Figs.22 and 23)
• Prior to performing the following procedure, remove the top
plate assembly.
(1) Bring up the mode sw. to release from the link plate (joint t)
and turn in the direction of the arrow to release the joint u.
(2) Unsolder the wire of the mode sw. marked s if necessary.
(3) Turn the select lock arm in the direction of the arrow to re-
lease the two joints v.
(4) The select lock arm spring comes off the select lock arm at
the same time.
Link plate
Joint u
Fig.22
Joint t
Mode sw.
Select lock arm
s
Top plate
Select lock arm
Link plate
Select lock arm
Fig.23
Top plate
Hook w
Select lock
arm spring
Joints v
(No.MA070B)1-21
Page 22
3.2.12 Reassembling the mode sw. / select lock arm
(See Figs.24 to 26)
REFERENCE:
Reverse the above removing procedure.
(1) Reattach the select lock arm spring to the top plate and set
the shorter end of the select lock arm spring to the hook w
on the top plate.
(2) Set the other longer end of the select lock arm spring to the
boss x on the underside of the select lock arm, and join the
select lock arm to the slots (joint v). Turn the select lock
arm as shown in the figure.
(3) Reattach the mode sw. while setting the part t to the first
peak of the link plate gear, and join the joint u.
CAUTION:
When reattaching the mode sw., check if the points y and
z are correctly fitted and if each part operates properly.
Select lock arm spring
Hook w
Joint v
Joint v
Select lock arm
Boss x
Fig.24
Joint t
Point y
Link plate
Point z
Link plate
Fig.25
Mode sw.
Select
lock arm
Joint t
Joint u
Fig.26
1-22 (No.MA070B)
Page 23
3.2.13 Removing the select arm R / link plate
(See Figs.27 and 28)
• Prior to performing the following procedure, remove the top
plate assembly.
(1) Bring up the select arm R to release from the link plate
(joint a') and turn as shown in the figure to release the two
joints b' and joint c'.
(2) Move the link plate in the direction of the arrow to release
the joint d'. Remove the link plate spring at the same time.
REFERENCE:
Before removing the link plate, remove the mode sw..
Select arm R
Joint b'
Link plate spring
Joint c'
Joint a'
Link plate
Joint b'
Fig.27
Joint r
3.2.14 Reattaching the Select arm R / link plate
(See Figs.29 and 30)
REFERENCE:
Reverse the above removing procedure.
(1) Reattach the link plate spring.
(2) Reattach the link plate to the link plate spring while joining
them at joint d'.
(3) Reattach the joint a' of the select arm R to the first peak of
the link plate while joining the two joints b' with the slots.
Then turn the select arm R as shown in the figure. The top
plate is joined to the joint c'.
CAUTION:
When reattaching the select arm R, check if the points e'
and f' are correctly fitted and if each part operates properly.
Top plate
Select arm R
Joint b'
Joint d'
Link plate
Fig.28
Link plate spring
Joint c'
Joint d'
Joint b'
Joint a'
Fig.29
Joint a'
Point e'
Link plate
Point f'
Fig.30
(No.MA070B)1-23
Page 24
3.2.15 Removing the loading roller assembly
(See Figs.31 to 33)
• Prior to performing the following procedure, remove the
clamper assembly and top plate assembly.
(1) Push inward the loading roller assembly on the gear side
and detach it upward from the slot of the joint g' of the lock
arm rivet assembly.
(2) Detach the loading roller assembly from the slot of the joint
h' of the lock arm rivet assembly.
The roller guide comes off the gear section of the loading
roller assembly.
Remove the roller guide and the HL washer from the shaft
of the loading roller assembly.
(3) Remove the screw J attaching the lock arm rivet assembly.
(4) Push the shaft at the joint i' of the lock arm rivet assembly
inward to release the lock arm rivet assembly from the slot
of the L side plate.
(5) Extend the lock arm rivet assembly outward and release
the joint j' from the boss of the chassis rivet assembly. The
roller guide springs on both sides come off at the same
time.
CAUTION:
When reassembling, reattach the left and right roller
guide springs to the lock arm rivet assembly before reattaching the lock arm rivet assembly to the chassis rivet
assembly. Make sure to fit the part k' of the roller guide
spring inside of the roller guide. (Refer to Fig.34.)
Roller guide
spring
Part k'
Chassis rivet assembly
Loading roller assembly
Loading roller assembly
Roller guide
spring
Fig.32
Boss
Roller guide
Joint h'
Roller guide spring
Loading roller assembly
HL washer
Loading roller assembly
Joint g'
Lock arm rivet assembly
Fig.31
Roller guide
Roller guide spring
Roller guide spring
J
Lock arm rivet assembly
Lock arm rivet assembly
L side plate
Roller guide spring
Joint i'
Joint j'
Fig.33
Roller guide
HL washer
Roller shaft assembly
Loading roller
Roller guide spring
Fig.34
1-24 (No.MA070B)
Page 25
3.2.16 Removing the loading gear 5, 6 and 7
(See Figs.35 and 36)
• Prior to performing the following procedure, remove the top
cover, chassis unit, pickup unit and top plate assembly.
(1) Remove the screw K attaching the loading gear bracket.
The loading gear 6 and 7 come off the loading gear bracket.
(2) Pull out the loading gear 5.
K
Loading gear 5
Loading gear bracket
K
Loading gear 6
Loading gear 5
Loading gear 3
Fig.35
Loading gear bracket
Loading gear 6
Loading gear 7
Fig.36
(No.MA070B)1-25
Page 26
3.2.17 Removing the gears
(See Figs.37 to 40)
• Prior to performing the following procedure, remove the top
cover, chassis unit, top plate assembly and pickup unit.
• Pull out the loading gear 3. (See Fig.35.)
(1) Pull out the feed gear.
(2) Move the loading plate assembly in the direction of the ar-
row to release the L side plate from the two slots m' of the
chassis rivet assembly. (See Fig.37.)
(3) Detach the loading plate assembly upward from the chas-
sis rivet assembly while releasing the joint n'. Remove the
slide hook and loading plate spring from the loading plate
assembly.
(4) Pull out the loading gear 2 and remove the change lock le-
ver.
(5) Remove the E ring and washer attaching the change gear
2.
(6) The change gear 2, change gear spring and adjusting
washer come off.
(7) Remove the loading gear 1.
(8) Move the change plate rivet assembly in the direction of the
arrow to release from the three shafts of the chassis rivet
assembly upward. (See Fig.38.)
(9) Detach the loading gear plate rivet assembly from the shaft
of the chassis rivet assembly upward while releasing the
joint p'. (See Figs.38 and 40.)
(10) Pull out the loading gear 4.
Change plate
rivet assembly
Shafts
E ring
Loading plate assembly
Loading plate spring
Joint p'
Loading gear 4
Loading gear plate
rivet assembly
Shaft
Loading gear 2
Loading gear 1
Chassis rivet assembly
Change gear 2
Fig.38
Joint n'
Slide hook
Feed gear
Fig.37
Slot m'
L side plate
Loading plate assembly
Joint n'
Slot m'
Chassis rivet assembly
Chassis rivet assembly
E ring
Washer
Change gear 2
Change gear
spring
Adjusting
washer
Change plate
rivet assembly
L side plate
Slot m'
Slot m'
Fig.39
Loading gear 1
Loading gear 2
Change lock lever
Loading gear 4
1-26 (No.MA070B)
Chassis rivet assembly
Loading gear plate rivet
assembly
Fig.40
Page 27
3.2.18 Removing the turn table / spindle motor
(See Figs.41 and 42)
• Prior to performing the following procedure, remove the top
cover, connector board, chassis unit and clamper assembly.
(1) Remove the two screws L attaching the spindle motor as-
sembly through the slot of the turn table on top of the body.
(2) Unsolder the wire on the connector board if necessary.
Turn table
L
Fig.41
L
Turn table
Spindle motor
Fig.42
(No.MA070B)1-27
Page 28
SECTION 4
ADJUSTMENT
4.1 Adjustment method
Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Electric voltmeter
(3) Digital tester
(4) Tracking offset meter
(5) Test Disc JVC :CTS-1000
(6) Extension cable for check
EXTSH002-22P × 1
Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
How to connect the extension cable for adjusting
Caution:
Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC respectively, before supply the power.
If voltage is applied without attaching these parts, the power amplifier IC and regulator IC will be destroyed by heat.
Standard measuring conditions
Power supply voltage DC14.4V(10.5 to 16V)
Load impedance 20KΩ(2 Speakers connection)
Output Level Line out 2.0V (Vol. MAX)
Dummy load
Exclusive dummy load should be used for AM,and FM. For FM
dummy load,there is a loss of 6dB between SSG output and
antenna input.The loss of 6dB need not be considered since
direct reading of figures are applied in this working standard.
Extension cable: EXTSH002-22P
CN501
Heat sink
Rear bracket
1-28 (No.MA070B)
Page 29
5.1 Feed section
SECTION 5
TROUBLESHOOTING
Is 5v or 0V at IC621
pin 40?
YES
Is 4V present at both
sides of the feed motor?
YES
Check the feed motor.
5.2 Focus section
5.3 Spindle section
NO
Is the wiring for IC621
pin 40 correct?
NO
Is 6V or 2V present at
IC681 pins 17 and 18?
Check IC681.
When the lens is
moving:
Does the S-search
waveform appear at
IC681 pins 13 and 14?
NO
NO
YES
4V
YES
Is 5V present at IC681
pin 6?
Check the vicinity of
IC621.
YES
Check the feed motor
connection wiring.
NO
Check the circuits in
the vicinity of IC681
pins 1 and 2.
Check the pickup and
its connections.
NO
Check CD8V.
YES
YES
Is the disk rotated?
YES
Does the RF signal
appear at IC601 pin 19?
YES
Is the RF waveform
at IC601 pin 19 distorted?
YES
Proceed to the Tracking
section
5.4 Tracking section
When the disc is rotated
at first:
Is the tracking error
signal output at IC601
pins 11 and 12?
NO
Is 4V present between
IC681 pins 15 and 16?
Check the spindle motor
and its wiring.
NO
Check the circuits in
the vicinity of IC601
or the pickup.
NO
NO
Approx. 1.2V
YES
NO
YES
Check the circuits in
the vicinity of IC601
pins 2 to 12.
Is 4V present at IC621
pin 41?
YES
Check the vicinity of
IC681.
NO
Check the pickup and
its connections.
NO
Check IC621.
Check IC621.
(No.MA070B)1-29
Page 30
5.5 Signal processing section
Is the sound output from
both channels (L, R)?
YES
Normal
NO
No sound from either
channel.
Is 9V present at IC161
pin 40?
Is the audio signal
(including sampling
output components)
output to IC572 pins 1
and 7 during playback?
Is the audio signal
output at IC161 pins 36
to 39 during playback?
YES
YES
YES
Compare the L-ch and
NO
R-ch to locate the
defective point.
NO
Is 9V present at IC901
pin 13?
Check the connection
between IC901 pin13
and IC161 pin 40.
NO
Check IC572 and its
peripheral circuits.
NO
Check IC161 and its
peripheral circuits.
YES
NO
Check IC901 and its
peripheral circuits.
YES
Is the audio signal output
at IC361/IC381 pins 12
and 13 during playback?
YES
Check the power amp.
IC301.
NO
Check IC361/IC381 and
its peripheral circuits.
1-30 (No.MA070B)
Page 31
5.6 Maintenance of laser pickup
(1) Cleaning the pick up lens
Before you replace the pick up, please try to clean the lens
with a alcohol soaked cotton swab.
(2) Life of the laser diode
When the life of the laser diode has expired, the following
symptoms will appear.
• The level of RF output (EFM output: amplitude of eye
pattern) will be low.
5.7 Replacement of laser pickup
Turn of the power switch and, disconnect the
power cord.
Replace the pickup with a normal one. (Refer
to "Removing the pickup unit" on the previous page.)
Is RF output
1.3 0.4Vp-p?
NO
Replace it.
YES
OK
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board
which is attached to the pickup is used to adjust the laser
power.Since this adjustment should be performed to match
the characteristics of the whole optical block, do not touch
the semi-fixed resistor.
If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should
be replaced. If the semi-fixed resistor is adjusted while the
pickup is functioning normally, the laser pickup may be
damaged due to excessive current.
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for about
seconds and the objective lens moves up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at
RF test point.
Finish.
(No.MA070B)1-31
Page 32
5.8 16 PIN CORD DIAGRAM
10
12
14
OR/WH
16
BR
YL
BK
NC
NC
11
RD
13
15
1
2
3
4
5
6
7
8
10
BL/WH
9
VI
VI/BK
GY
GY/BK
WH
WH/BK
GN
GN/BK
BR
VI/BK
2
4
GY/BK
WH/BK
6
8
GN/BK
RR+
RR-
FR+
FR-
FL+
FL-
RL+
RL-
TEL
VI
GY
WH
GN
1
BK
RD
Black
Red
3
BL
5
7
WH White
BR
Blue
Brown
GN
VI
GY
YL
OR
Green
Violet
Gray
Yellow
Orange
RR
FR
FL
RL
REMOTE
ILL
YL
12
BL/WH
13
OR/WH ILL
14
RD
15
16
BK
Rear Right
Front Right
Front Left
Rear Left
Remote out
Illuminations Control
MEMORY
REMOTE
ACC
GND
ANT
ACC
TEL
GND
MEMORY
MEMORY BACKUP
DIRECT TO BATTERY
+12Volt
ACC + 12Volt
GROUND
Auto Antenna
ACC Line
Telephone Muting
Ground
Memory Backup Battery+
1-32 (No.MA070B)
Page 33
(No.MA070B)1-33
Page 34
Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.MA070B)
Printed in Japan
VPT
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