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
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)
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
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
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.49878)1-5
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)
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
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)
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
Loading...