Safety precaution ------------------------------------- 1-2
1-4
1-5
1-10
1-11
Maintenance of laser pickup ----------------------- 1-13
Replacement of laser pickup ---------------------- 1-13
Description of major ICs ---------------------------- 1-14
Contents
CD RECEIVER
SERVICE MANUAL
KD-SX870
KD-SX770
No.49595
Feb. 2001
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
Area Suffix
J ...
Northern America
KD-SX870
KD-SX770
...
Location of main parts -------------------------------
Disassembly method --------------------------------
Adjustment method ----------------------------------
Flow of functional operation unit TOC read ----
1-3
Preventing static electricity -------------------------
KD-SX770
KD-SX870
1-2
KD-SX870
KD-SX770
! CAUTION 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.
Safety precaution
! CAUTION Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
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.
1.1. Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
1.1.1. Ground the workbench
1. 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.
1.1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
1.1.3. Handling the optical pickup
1. 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.)
2. 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.
1.2. 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
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
Shorted part
1-3
KD-SX870
KD-SX770
Location of main parts
Control unit
Main unit
CD mechanism
Main board
16 pin connector
Power IC
Main board assembly
Loading motor
Damper
Damper
Damper
Spindle motor
Feed motor
Optical
pick up unit
Mechanism relay board
RCA jack
Connector to front PCB
Antenna
jack
Changer control
connector
Front PCB
Display
Tuner
pack
1-4
KD-SX870
KD-SX770
Disassembly method
Removing the front chassis (See Fig.1)
1. Remove two screws A and insert a screwdriver to the
joints a on the side of the front chassis and two joints b
on the right side, then detach the front chassis toward the
front side.
Removing the heat sink (See Fig.2 )
1. Remove the three screws B attaching the heat sink on
the left side of the body, and remove the heat sink.
Removing the bottom cover (See Fig.3 )
1.
2.
Turn the body upside down.
Insert a screwdriver to the two joints c and two joints d on
both sides of the body and the joint e on the back of the
body, then detach the bottom cover from the body.
Fig.1
Fig.2
Front chassis
b
a
a
b
Heat sink
B
B
B
Fig. 3
Regulator board
e
d
c
A
A
1-5
KD-SX870
KD-SX770