Page 1
49878200311
SERVICE MANUAL
VCD/CD RECEIVER
KD-SV203
Area suffix
UF ---------------------- China
UP
DOWN
VIDEO CD
123
456
7809
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.49878
2003/11
Page 2
SPECIFICATION
AUDIO AMPLIFIER SECTION
Maximum Power
Output
Continuous Power
Output (RMS)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Tone Control Rang Bass ±10 dB at 100 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
Color system PAL/NTSC
Video output (composite) 1Vp-p/75Ω
Frequency Range FM 87.5 MHz to 108 MHz
[FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
[AM Tuner] Sensitivity 20 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 88 dB
Signal-to-Noise Ratio 90 dB
Wow and Flutter Less than measurable limit
MP3 decoding format MPEG1 Audio Layer 3
Max. Bit Rate 320 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)
Mass (approx.) 1.3 kg (excluding accessories)
Front 50 W per channel
Rear 50 W per channel
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.
Treble ±10 dB at 10 kHz
VIDEO SECTION
TUNER SECTION
AM 531 kHz to 1 602 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 35 dB
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
GENERAL
Installation Size (approx.) 182 mm × 52 mm × 150 mm
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
1-2 (No.49878)
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.49878)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 dio de) in devices such as CD players.
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 sh eet) 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 instal lation, both sides of the laser di ode on the replacement optica l
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 CD pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the CD 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.49878)
Short-circuit point
Pickup
Pickup
Page 5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.49878)1-5
Page 6
SECTION 3
DISASSEMBLY
3.1 Main body
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 and remove the front panel assembly.
3.1.2 Removing the bottom cover
(See Fig.2)
(1) Turn the main body up side down.
(2) Insert a screwdriver under the joints to release the two
joints a on the left side, two joints b on the right side and
joint c on the back side of the main body, then remove the
bottom cover from the main body.
CAUTION:
When releasing the joints using a screwdriver, do not damage
the main board.
Joint a
Front panel assembly
Detach button
Fig.1
Bottom cover
Joint b
3.1.3 Removing the front chassis assembly
(See Fig.3)
• Prior to performing the following procedures, remove the front
panel assembly and bottom cover.
(1) Remove the screw A on the both sides of the main body.
(2) Release the two joints d and two joints e on the both sides
of the main body, then remove the front chassis assembly
toward the front.
Joint a
Joint c
Fig.2
Joint d Joint e
A
Joint d
Front chassis
Fig.3
Joint e
Joint b
1-6 (No.49878)
Page 7
3.1.4 Removing the side panel
(See Fig.4)
• Prior to performing the following procedure, remove the front
panel assembly as required.
(1) Remove the two screws B and two screws C attaching the
side panel on the left side of the main body, and remove the
side panel.
3.1.5 Removing the rear bracket
(See Fig.5)
• Prior to performing the following procedure, remove the bottom
cover.
(1) Remove the three screws D, screw E and six screws F at-
taching the rear bracket on the back side of the main body.
(2) Remove the rear bracket.
Reference:
During reassembly, before fixing the rear bracket onto the
main body, insert the video out cable into the slot.
C
FF
B
Side panel
Fig.4
Rear bracket
F
C
E
3.1.6 Removing the main board
(See Fig.6)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly, side panel, bottom
cover and rear bracket.
(1) Remove the two screws G attaching the main board.
(2) Disconnect the connector CN501
board.
and remove the main
G
D
CN501
D
Insert the video out cable
into the slot.
Fig.5
Main board
G
Fig.6
(No.49878)1-7
Page 8
3.1.7 Removing the Sub board
(See Fig. 7)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly, side panel, bottom
cover, rear bracket and main board.
(1) Remove the five screws H attaching the Sub board.
(2) Disconnect the card wire from the connector CN601
Sub board.
(3) Move the Sub board in the direction of the arrow to release
it from the joint f.
on the
H
Joint f
CN601
Card wire
3.1.8 Removing the CD mechanism assembly
(See Fig. 8)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly, side panel, bottom
cover, rear bracket, main board and Sub board.
(1) Remove the three screws J attaching the top chassis.
(2) Take out the CD mechanism assembly.
Sub board
CD mechanism assembly
Top chassis
H
Fig.7
J
Top chassis
J
Fig.8
1-8 (No.49878)
Page 9
3.1.9 Removing the front board
(See Figs.9 to 11)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Remove the four screws K on the back side of the front
panel assembly. (See Fig.9.)
(2) Release the thirteen joints g. (See Fig.10.)
(3) Release the joint h and take out the front board. (See
Fig.11.)
K
K
Fig.9
Joints g Joints g
Joints g
Front board
Joints g
Fig.10
Joint h
K
Joints g
Joints g
Front panel assembly
Fig.11
(No.49878)1-9
Page 10
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
1-10 (No.49878)
Page 11
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 bo ard 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
(No.49878)1-11
Page 12
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
1-12 (No.49878)
Page 13
3.2.4 Removing the chassis unit
r
(See Figs.8 and 9)
• Prior to performing the following procedure, re move the top
cover and connector board.
(1) Remove the two suspensi on springs (L) an d (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
(No.49878)1-13
Page 14
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
1-14 (No.49878)
Page 15
3.2.6 Removing the loading / feed motor assembly
(See Figs.12 and 13)
• Prior to performing the following procedure, re move 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
(No.49878)1-15
Page 16
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 wh ile 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
1-16 (No.49878)
Page 17
3.2.9 Removing the trigger arm
r
(See Figs.19 and 20)
• Prior to performing the following procedure, re move 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, re move 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
(No.49878)1-17
Page 18
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
1-18 (No.49878)
Page 19
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 th e 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
(No.49878)1-19
Page 20
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 th e lin k plate sprin g whil e joi ning
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
1-20 (No.49878)
Joint a'
Point e'
Link plate
Point f'
Fig.30
Page 21
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
(No.49878)1-21
Page 22
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
1-22 (No.49878)
Page 23
3.2.17 Removing the gears
(See Figs.37 to 40)
• Prior to performing the following procedure, re move 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 gea r.
(2) Move the loading plate a ssemb ly in the d irection o f 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 assemb ly 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
Chassis rivet assembly
Loading gear plate rivet
assembly
Fig.40
(No.49878)1-23
Page 24
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
1-24 (No.49878)
Spindle motor
Fig.42
Page 25
SECTION 4
ADJUSTMENT
4.1 Adjustment method Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) AM Standard signal generator
(3) FM Standard signal generator
(4) Stereo modulator
(5) Electric voltmeter
(6) Digital tester
(7) Tracking offset meter
(8) Test Disc JVC :CTS-1000
(9) 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(11 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.
Heat sink
(Attach the heat sink
using the two screws.)
CN501
Extension cable
EXTSH002-22P
Rear bracket
(Attach the rear bracket
using the screw.)
(No.49878)1-25
Page 26
5.1 Service mode
Operation method
SECTION 5
TROUBLESHOOTING
Insert the test disc
"TOC read" starts
Press the [CD], [SEL]
and [POWER] keys
simultaneously for 2 seconds.
"VERSION" is
indicated on the LCD.
Press the [SEL] key
"MAIN 400" is
indicated on the LCD.
Press the [F.SKIP] key
"SUB 225" is
indicated on the LCD.
MAIN 400
SUB 225
(Note)
If "SUB 000" and "VCD 000"
are indicated on the LCD,
these operations are required.
Main micon software version
Space
Sub micon software version
Press the [F.SKIP] key
"SUB 144" is
indicated on the LCD.
Press the [F.SKIP] key
Sequence of LCD diaplay
Press the [F.SKIP] . . . . . . . . MAIN SUB VCD/CD MAIN
Press the [B.SKIP] . . . . . . . . MAIN VCD/CD SUB MAIN
Cancellation of service mode
No operation for ten seconds Return to normal display
Press the key except for [F.SKIP] or [B.SKIP] key Return to normal display
VCD 144
VCD/CD control IC software version
1-26 (No.49878)
Page 27
5.2 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.
5.3 Replacement of laser pickup
Turn off the power switch and,disconnect the
power cord from the ac outlet.
Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)
Is RF output
1.3 0.4Vp-p?
NO
Replace it.
YES
O.K
(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 3seconds 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.49878)1-27
Page 28
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.49878)
Printed in Japan
WPC
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