JVC KD-SH9105 Service Manual
SERVICE MANUAL
CD RECEIVER
4983420036
KD-SH9105
Area Suffix
U -------------------- Other Areas
ATT
ANGLE
EQ
CD
DAB
DISC
FM
PRESET
PRESET
R D
AM
CH
AUX SEL
RM-RK100
50Wx4
SRC
DISC
VOLUME
D
DISP
ATT
MOSFET
SEL
KD-SH9105
BBE
3456 M21
MODE
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
6 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.49834
2003/6
SPECIFICATION
AUDIO AMPLIFIER SECTION Maximum Power Output Front 50 W per channel
Rear 50 W per channel
Continuous Power Output (RMS) 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.
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4
kHz, 6 kHz, 12 kHz
Level ±10 dB
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-In Level/Impedance LINE IN 1.5 V/20 kΩ load
Line-Out Level/Impedance LINE OUT 4.0 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
TUNER SECTION Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 kHz
[FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity
(400 kHz)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation: 35 dB
Capture Ratio 1.5 dB
[AM Tuner] Sensitivity 20 µV
Selectivity 35 dB
CD PLAYER SECTION 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 98 Db
Signal-to-Noise Ratio 102 dB
Wow and Flutter Less than measurable limit
MP3 (MPEG Audio Layer 3) Max.
Bit rate:
WMA (Windows Media® Audio)
Max. Bit rate:
GENERAL Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D) Installation Size 182 mm × 52 mm × 161 mm
Panel Size 188 mm × 58 mm × 17 mm
Mass 1.8 kg (excluding accessories)
320 Kbps
192 Kbps
65 dB
1-2 (No.49834)
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.49834)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 CDpickup 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.49834)
Pickup
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.49834)1-5
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 in the direction of the arrow .
3.1.2 Removing the top chassis
(See Figs.2 to 6)
• Turn on power.
(1) Push the eject button in the upper right part of the front pan-
el assembly to move the front panel assembly as shown in
Fig.2 and turn off power.
(2) Remove the two screws A attaching the top chassis from
the top side of the main body. (See Fig.3.)
(3) Remove the three screws B attaching the top chassis from
the both sides of the main body. (See Figs.4 and 5.)
(4) Remove the screw C and three screws D attaching the heat
sink from the left side of the main body. (See Fig.5.)
(5) Remove the two screws E and screw F attaching the top
chassis from the back side of the main body. (See Fig.6 .)
(6) Move the top chassis up ward and remove it with the CD
mechanism assembly. The connector CN501 on the CD
mechanism assembly is disconnected from the connector
CN981 on the main board.
Front panel assembly
Top chassis
Front panel assembly
BB
C
Detach button
Fig.1
Top chassis
Fig.4
Top chassis
A
Front panel assembly
1-6 (No.49834)
Eject button
Fig.2
Top chassis
Fig.3
A
Heat sink
E
BD
Fig.5
F
Fig.6
3.1.3 Removing the mecha control board
(See Fig.7)
• Prio r to performing the following procedures, remove the top
chassis.
(1) Disconnect the card wire from the connector CN601 on the
mecha control board.
(2) Remove the five screws G attaching the mecha control
board.
(3) Release the joints a and b, remove the mecha control
board.
Mecha control board
G
CN601
3.1.4 Removing the CD mechanism assembly
(See Fig.8)
• Prio r to performing the following procedure, remove the top
chassis.
(1) Remove the three screws H from the inside of the top chas-
sis and remove the CD mechanism assembly.
a
Top chassis
b
G
Fig.7
H
HH
CD mechanism assembly
Fig.8
(No.49834)1-7
3.1.5 Removing the motor assembly
(See Figs.9 to 11)
• Prior to performing the following procedures, remove the top
chassis.
(1) Remove the spring from the motor bracket. (See Fig.9.)
(2) Disconnect the wire from the connector CN982 on the main
board. (See Fig.10.)
(3) Remove the two screws J attaching the motor bracket.
(See Fig.10.)
(4) Remove the washer attaching the clutch assembly and pull
out the clutch assembly from the shaft. (See Fig.11.)
(5) Remove the two screws K attaching the motor assembly to
the motor bracket. (See Fig.11.)
Main board
Spring
Motor braket
Fig.9
CN982
Clutch assembly
Motor braket
J
Fig.10
Motor braket
K
Motor assembly
1-8 (No.49834)
Washer
Fig.11
3.1.6 Removing the main board
k
(See Figs.12 to 16)
• Prio r to performing the following procedures, remove the top
chassis and motor assembly.
(1) Disconnect the flexible wires from the con nectors CN703
and CN991 on the main board respectively. (See Fig.12.)
(2) Move the front bracket backward until it stops.
(3) Remove the four screws L attaching the arm brackets (L)
and (R). Move the arm brackets (L) and (R) from the rod
gear. (See Fig.12.)
(4) Remove the rod gear.
(5) Remove the screw M attaching the rear panel to the bottom
cover from the back side of the main body. (See Fig.14.)
(6) Remove the three screws N attaching the main b oard and
move the main board backwards to release the two joints
c. (The main board will be removed with the rear panel and
rear heat sink) (See Figs.12 and 15.)
(7) Remove the screw P and Q attaching the rear he at sink.
(See Fig.16.)
(8) Remove the three screws R and screw S attaching the rear
panel, then remove the main board. (See Fig.16.)
NN
Main board
Arm
brackets (L)
L
Arm
brackets (R)
Arm brackets (L)
Arm brackets (R)
Rod gear
Rear panel
Joint c
Fig.13
M
Fig.14
Main board
Bottom cover
Joint c
Main board
L
CN703
3.1.7 Removing the lifter switch board
(See Fig.17)
• Prio r to performing the following procedure, remove the top
chassis, motor assembly and main board.
(1) Remove the two screws T attaching the lifter switch board
to the bottom chassis.
CN991
Fig.12
M
Rod gear
R
Rear panel
Lifter switch board
S
Q
Fig.15
P
Rear heat sin
Fig.16
Bottom chassis
T
Fig.17
(No.49834)1-9
3.1.8 Removing the lifter board
(See Figs.18 to 24)
• Prior to performing the following procedures, remove the top
chassis and front panel assembly.
(1) Disconnect the flexible wire from the connector CN991 on
the main board. (See Fig.18.)
(2) Remove the four screws U attaching the front bracket on
the both sides of the main body. (See Figs.19 and 20.)
(3) Push the pin of the joint d on the front side of the front
bracket to release the detach lever. (See Fig.21.)
(4) Remove the screw V attaching the connector cover in the
rear side of the front bracket. (See Fig.22.)
(5) Release the two joints f while pushing them from the front
side, and then move the connector cover in the direction of the
arrow and release the eight joints e. (See Figs.22 and 23.)
(6) Remove the two screws W attach ing the lifter board from
the front side of the main body. (See Fig.24.)
Main board
Front bracket
Joint f
V
Connector cover
Joint e
Joints e
Lifter board
Fig.21
Joint
Front bracket
Fig.22
e
d
Joint
Datch lever
Joint e
Joint f
Joint e
CN991
Front bracket
U
Fig.18
Fig.19
Fig.20
Front bracket
U
Front bracket
Connector cover
Fig.23
W
Fig.24
1-10 (No.49834)
3.1.9 Removing the front board (See Figs.25 to 28)
• Prio r to performing the following procedure s, remove the front
panel assembly.
(1) Remove the six screws X attaching the rear panel to the
front panel assembly. (See Fig.25.)
(2) Pull out the volume knob from the front side of the front
panel assembly. (See Fig.26.)
(3) Release the ten joints g of the front panel and the rear pan-
el. (See Fig.27.)
(4) Take out the front bo ard from the front panel assembly.
(See Fig.28.)
XX
Rear panel
XX
Fig.25
Front panel assembly
Volume knob
Joints g
Joints g
Fig.26
Rear panel
Joints g
Joints g
Fig.27
Front board
Fig.28
(No.49834)1-11
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
1-12 (No.49834)
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.49834)1-13
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
1-14 (No.49834)
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