JVC KD-SX991R User manual

SERVICE MANUAL
CD RECEIVER
No.49619
Feb. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
KD-SX991R / KD-SX911R
KD-SX991R / KD-SX911R
Area Suffix
E ---- Continental Europe
Contents
Safety precaution
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
1-2
1-3
1-4
1-5
1-12
Flow of functional
operation unit TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-13
1-15
1-15
1-16
KD-SX991R
KD-SX911R
MO
TPTP
RDSRDS
PTYPTY
DISPDISP
8 9 10 11 127
DAB
MO
TPTP
RDSRDS
PTYPTY
DISPDISP
8 9 10 11 127
DAB
KD-SX991R
KD-SX911R
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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KD-SX991R / KD-SX911R
1-2
!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
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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KD-SX991R / KD-SX911R
1-3
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
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. 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
1.1.3. 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.
1.1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
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. 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.
FD screw
Feed motor ass’y
FD gear
Pickup unit
Shorting Short circuit land
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KD-SX991R / KD-SX911R
1-4
Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter lock
failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace the
complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which prevent
emission of radiation when the drawer is open and the safety
interlocks have failed or are defeated.
It is dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Äläkatso
säteeseen.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngåutsettelse
for stråling.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
DANGER : Invisible laser
radiation when open and
interlock or defeated.
AVOID DIRECT EXPOSURE
TO BEAM (e)
VARNING : Osynlig laser-
strålning är denna del
är öppnad och spårren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suo-
jalukitus ohitettaessa olet
alttiina näkymättömälle
lasersäteilylle.Äläkatso
säteeseen. (d)
ADVARSEL :Usynlig laser-
stråling ved åbning , når
sikkerhedsafbrydere er ude
af funktion. Undgåudsæt
telse for stråling. (f)
CLASS 1
LASER PRODUCT
!
CAUTION
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
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KD-SX991R / KD-SX911R
1-5
Press the eject button in the lower left part of the
front panel. Remove the front panel assembly from
the body.
1.
Removing the front panel assembly
(See Fig.1)
Prior to performing the following procedure, remove
the front panel assembly.
Remove the two screws Aattaching the front
chassis assembly on the front of the body.
Release the four joint tabs aon both sides of the
front chassis assembly and remove the front chassis
assembly toward the front.
1.
2.
Removing the front chassis assembly
(See Fig.2 to 4)
Disassembly method
<Main body>
Fig.1
Fig.2
Fig.3
Fig.4
Front panel assembly
Eject button
Tab a
Tab a
Front chassis assembly
Front chassis
assembly
Heat sink Tab a
Tab a
Front chassis assembly
A
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KD-SX991R / KD-SX911R
1-6
Remove the three screws Bon the left side of the
body.
1.
Removing the heat sink (See Fig.5)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly
and the heat sink.
Turn over the body and unjoint the five joints bwith
the bottom cover and the body using a screwdriver.
1.
Removing the bottom cover
(See Fig.6 and 7)
Fig.5
Fig.6
Fig.7
Heat sink
BB
Joints b
Joints b
Joint b
Joints b
Joints b
Joint b
Bottom cover
Bottom cover
Rear panel
Rear panel
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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KD-SX991R / KD-SX911R
1-7
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink and the bottom cover.
Remove the screw C, the three screws D and the
three screws Eattaching the rear panel on the back
of the body. Remove the rear panel.
Remove the two screws Fattaching the main board
on the bottom of the body. Disconnect connector
CN501 on the main board in the direction of the
arrow.
1.
2.
Removing the main board
(See Fig.8 and 9)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink, the bottom cover and the main board.
Remove the three screws Gattaching the CD
mechanism section on the back of the top chassis.
1.
Removing the CD mechanism section
(See Fig.10)
Fig.8
Fig.9
Fig.10
Rear panel
C
E
E
E
D
Main board
F
F
CN501
CD mechanism section
G
G
G
Top chassis
D
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KD-SX991R / KD-SX911R
1-8
Prior to performing the following procedure, remove
the front panel assembly.
Remove the four screws Hattaching the rear cover
on the back of the front panel assembly.
Unjoint the seven joints cwith the front panel and the
rear cover.
Remove the control switch board on the back of the
front panel.
1.
2.
3.
Removing the control switch board
(See Fig.11 to 13)
Fig.11
Fig.12
Fig.13
H
HH
H
Rear cover
Joints c
Joints c
Front panel
Rear cover
Front panel
Control switch board
Joint c
Joints c
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KD-SX991R / KD-SX911R
1-9
Unsolder the part aand bon the CD mechanism
control board.
Remove the stator fixing the CD mechanism control
board and the damper bracket (To remove the stator
smoothly, pick up the center part).
Remove the screw Aattaching the CD mechanism
control board.
Remove the CD mechanism control board in the
direction of the arrow while releasing it from the two
damper bracket slots dand the front bracket slot e.
Disconnect the flexible wire from connector on the
pickup unit.
1.
2.
3.
4.
5.
Removing the CD mechanism control
board (See Fig.1 and 2)
Turn the FD gear in the direction of the
arrow to move the entire pickup unit to
the appropriate position where the
flexible wire of the CD mechanism unit
can be disconnected easily.
(Refer to Fig.2)
ATTENTION:
Prior to performing the following procedure, remove
the CD mechanism control board.
Remove the two springs fattaching the CD
mechanism assembly and the front bracket.
Remove the two screws Band the front bracket
while pulling the flame outward.
Remove the belt and the screw Cfrom the loading
motor.
1.
2.
3.
Removing the loading motor
(See Fig.3 to 5)
<CD mechanism section>
Fig.2
Fig.3
Fig.4
Shift the lock
Flexible wire
Pickup unit
FD gear
CD mechanism control board
Loading motor Front bracket
Front bracket Pull outward
Pull outward
Flame
f
B
f
B
Fig.5
C
Loading motor
Belt
Fig.1
Front bracket CD mechanism
control board
Damper bracket
h
c
d
b
a
DD
D
CD mechanism assembly
Ae
h
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KD-SX991R / KD-SX911R
1-10
Prior to performing the following procedure, remove
the CD mechanism control board and the front
bracket (loading motor).
Remove the three screws Dand the damper
bracket.
Raise the both sides fix arms and move the fix plates
in the direction of the arrow to place the four shafts g
as shown in Fig.8 and 9.
Remove the CD mechanism assembly and the two
springs hattaching the flame.
Remove the two screws Eand both sides rear
damper brackets from the dampers. Detach the CD
mechanism assembly from the left side to the right
side.
1.
2.
3.
4.
Removing the CD mechanism assembly
(See Fig.1, 6 to 9)
The CD mechanism assembly can be
removed if only the rear damper
bracket on the left side is removed.
ATTENTION:
Fig.6
Fig.7
Fig.8
Fig.9
Rear damper bracket
Fix arm (R)
Damper
DD
Damper bracket
CD mechanism
assembly
Flame h
h
D
D
Fig.1
Front bracket CD mechanism
control board
Damper bracket
h
c
d
b
a
DD
D
CD mechanism assembly
Ae
Fix plate (L)
g
g
Rear damper bracket Fix arm (L)
Damper
E
Fix plate(R)
E
g
g
h
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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