SERVICE MANUAL
CD RECEIVER
4983120035
KD-SH9750,KD-SH9700
ATT
ANGLE
EQ
CD
DAB
DISC
FM
PRESET
PRESET
R D
Detachable
AM
CH
AUX SEL
RM-RK100
SRC
DISC
VOLUME
D
DISP
ATT
SEL
3456 M21
BBE
MODE
KD-SH9750
Area Suffix
J -------------------------- U.S.A.
C --------------------- CANADA
KD-SH9750C KD-SH9700J
KD-SH9700
Area Suffix
J -------------------------- U.S.A.
ARSENAL rogo
Line output level
WARRANTY
KD-SH9750J
4 V 4 V 2 V
2 YEAR 1 YEAR 1 YEAR
TABLE OF CONTENTS
1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.49831
2003/5
SPECIFICATION
AUDIO
AMPLIFIER
SECTION
TUNER
SECTION
CD
PLAYER
SECTION
GENERAL Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Design and specifications are subject to change without notice.
If a kit is necessary for your car consult your telephone directory for the nearest car audio speciality shop.
1-2 (No.49831)
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. 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 (KD-SH9750 only)
Line-Out Level/Impedance KD-SH9750 4.0 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Frequency Range FM 87.5 MHz to 107.9 MHz (with channel
[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 98 dB
Signal-to-Noise Ratio 102 dB
Wow and Flutter Less than measurable limit
MP3 (MPEG Audio Layer 3) Max. Bit rate 320 Kbps
(R)
WMA (Windows Media
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W x H x D) Installation Size 182 mm x 52 mm x 161 mm
Audio) Max. Bit rate 192 Kbps
LINE IN 1.5 V/20 kΩ load
KD-SH9700 2.0 V/20 kΩ load (full scale)
interval set to 200 kHz) 87.5 MHz to
108.0 MHz (with channel interval set to
50 kHz)
AM 530 kHz to 1 710 kHz (with channel
interval set to 10 kHz) 531 kHz to 1 602
kHz (with channel interval set to 9 kHz)
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
Selectivity 35 dB
Panel Size 188 mmx 58 mm x 17 mm
Mass 1.8 kg (4.0 lbs) (excluding accessories)
65 dB
(7-3/16" x 2-1/16" x 6-3/8")
(7-7/16" x 2-5/16" x 11/16")
1.1 Safety Precautions
SECTION 1
Precautions
!
!
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.49831)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 tra v erse 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.49831)
Short-circuit point
Pickup
Pickup
SECTION 2
Disassembly method
2.1 Main body section
2.1.1 Removing the front panel assembly (See Fig.1)
(1) Push th e detach button in the lower right part of the front
panel assembly.
(2) Remove the front panel assembly in the direction of the
arrow.
Front panel assembly
Detach button
Fig.1
(No.49831)1-5
2.1.2 Removing the top chassis (See Figs.2 to 6)
• Turn on power.
(1) Push the eject bu tton in the upper right part of the front
panel 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) Remo ve 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 upward 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.
Top chassis
Front panel assembly
C
Top chassis
BB
Fig.4
Top chassis
Heat sink
Fig.5
E
Eject button
Fig.2
Top chassis
Fig.6
AA
BD
F
Front panel assembly
1-6 (No.49831)
Fig.3
2.1.3 Removing the mecha control board (See Fig.7)
• Prior 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
2.1.4 Removing the CD mechanism assembly (See Fig.8)
• Prior to performing the following procedure, re move the top
chassis.
(1) Remove the three screws H from the inside of the top
chassis and remove the CD mechanism assembly.
a
Top chassis
b
G
Fig.7
H
HH
CD mechanism assembly
Fig.8
(No.49831)1-7
2.1.5 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
Motor braket
Clutch assembly
J
Fig.10
Motor braket
K
Motor assembly
1-8 (No.49831)
Washer
Fig.11
2.1.6 Removing the main board (See Figs.12 to 16)
A
A
• Prior to performing the following procedures, remove the top
chassis and motor assembly.
(1) Disconn ect the flexible wires from the connectors 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 ge ar.
(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 scre ws N attaching th e main board a nd
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 scre w P and Q attaching the rear heat 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.)
Rear panel
M
Bottom cover
Fig.14
Joint c
Main board
Joint c
rm
brackets (L)
L
CN703
rm brackets (R)
NN
Main board
Arm
brackets (R)
L
Rod gear
CN991
Fig.12
Arm brackets (L)
M
R
Rear panel
S
Fig.15
P
Q
Rear heat sink
Fig.16
Rod gear
Fig.13
Main board
(No.49831)1-9
2.1.7 Removing the lifter switch board (See Fig.17)
• Prior to performing the following procedure, remove the top
chassis, motor assembly and main board.
(1) Remove th e two screws T attach ing the lifter sw itch boa rd
to the bottom chassis.
2.1.8 Removing the lifter board (See Figs.18 to 24)
• Prior to performing the following procedures, remove the top
chassis and front panel assembly.
(1) Disconne ct 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 th e 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 w hile 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 attaching the lifter board from
the front side of the main body. (See Fig.24.)
Main board
Lifter switch board
Front bracket
Bottom chassis
T
Fig.17
U
Fig.19
CN991
1-10 (No.49831)
Front bracket
U
Fig.20
Front bracket
Fig.18
r
Joint d
f
Front bracket
Joint f
V
Connector cover
Joint e
Joints e
Lifter board
Fig.21
Joint
Front bracket
Fig.22
e
Datch leve
Joint e
Joint
Joint e
Fig.23
Fig.24
Connector cover
W
(No.49831)1-11
2.1.9 Removing the front board (See Figs.25 to 28)
• Prior to performing the following procedures, remove the fro nt
panel assembly.
(1) Remove the six screws X atta ching the rear panel to the
front panel assembly. (See Fig.25.)
(2) Pul l 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 boa rd 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
1-12 (No.49831)
2.2 CD Mechanism section
A
2.2.1 Removing the top cover
(See Figs.1 and 2)
(1) Remove the fo ur screws A on the both side of the body.
(2) Lift the front side of the top cover an d 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.49831)1-13
2.2.2 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 th e 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.49831)
2.2.3 Removing the DET switch
(See Figs.6 and 7)
(1) Exten d the two tabs c of the feed sw. hol der and pull out
the switch.
(2) Unsol der 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.49831)1-15
2.2.4 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.49831)
2.2.5 Removing the clamper assembly
(See Figs.10 and 11)
• Prior to performing the following procedure, re move 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.49831)1-17
2.2.6 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
assembly 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 loadin g /
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.49831)
2.2.7 Removing the pickup unit
r
(See Figs.14 to 18)
• Prior to performing the following procedure, re move 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 th e 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 scre w F attaching the feed rack to the pickup
unit.
2.2.8 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. Reatta ch 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.49831)1-19
2.2.9 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
2.2.10 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.49831)
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