JVC KD-SH99 User manual
SERVICE MANUAL
CD RECEIVER
No.49643
Jun. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
KD-SH99
KD-SH99
Area Suffix
J Northern America
Contents Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
Flow unit reading TOC
of CD/CD-R/CD-RW
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1- 2
1- 3
1- 4
1-15
1-18
1-20
1-20
1-21~44
Detachable
ANGLE
RM-RK100
CD
FM
AM
CH
AUX SEL
VOLUME
R D
ATT
DAB
DISC
PRESET PRESET
DISC
EQ
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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KD-SH99
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 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-3
Front bracket
CD mechanism
control board
Damper bracket
CD mechanism ass’y
FD screw
Feed motor ass’y
FD gear Pickup unit
Preventing static electricity
1.Grounding to prevent damage by 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.
2.About the earth processing for the destruction prevention by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench
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.
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
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.
4.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
Soldering
Attention when traverse unit is decomposed
1.Solder is put up before the card wire is removed from connector on
the CD substrate as shown in Figure.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)
2.Please remove solder after connecting the card wire with
when you install picking up in the substrate.
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the substrate.
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-4
Press the release button in the lower right part of the
front panel assembly to unlock.
Remove the front panel assembly in the direction of
the arrow.
1.
2.
Disassembly method
Removing the front panel assembly
(See Fig.1)
Turn on power.
Press the eject button in the upper left part of the
front panel assembly to move the assembly as
shown in Fig.2 and turn off power.
Remove the two screws Aon the upper side of the
body.
1.
2.
Removing the top chassis(See Fig.2 to 6)
Fig.1
Fig.2
Front panel assembly
Release button
Front panel assembly
Eject button
Top chassis
Fig.3
Front panel assembly
Top chassis
AA
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-5
Remove the three screws B on both sides of the
body.
Remove the screw Cand the three screws Don the
left side of the body.
Remove the two screws Eand the screw Fon the
back of the body.
Move the top chassis upward and remove it with the
CD mechanism assembly. The connector on the CD
mechanism assembly is disconnected from
connector CN601 on the main board.
3.
4.
5.
6.
Fig.6
Fig.4
Fig.5
BB
Top chassis
Top chassis
BD
C
EF
Heat sink
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-6
Prior to performing the following procedure, remove
the top chassis.
Remove the three screws Ginside the top chassis
and remove the CD mechanisma ssembly.
1.
Removing the CD mechanism assembly
(See Fig.7)
Prior to performing the following procedure, remove
the top chassis.
Disconnect the wire from connector CN703 on the
main board.
Remove the motor bracket and the spring attached
to the arm braket assembly (R).
Remove the two screws Hattaching the motor
bracket.
Remove the washer attaching the clutch assembly
and pull out the clutch assembly from the shaft.
Remove the two screws Iand the motor assembly
from the motor bracket.
1.
2.
3.
4.
5.
Removing the motor assembly
(See Fig.8 to 10)
Fig.7
Fig.8
Fig.9
Fig.10
Top chassis G
G
G
CD mechanisma ssembly
Arm braket assembly (R) Motor assembly
Motor braket
Spring
Motor assembly
Motor braket
Motor braket
CN601
CN703
H
H
Main board
R
Clutch assembly
Washer
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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KD-SH99
1-7
Prior to performing the following procedures, remove
the top chassis and the motor bracket.
Disconnect the flexible wire from connector CN701
and CN702 on the main board respectively.
Move the front bracket backward until it stops.
Remove the four screws Jattaching the arm
brackets (L) and (R). Move the right and arm lefter
brackets from the rod gear.
Remove the rod gear.
Remove the screw Kattaching the rear panel to the
bottom cover on the back of the body.
1.
2.
3.
4.
5.
Removing the main board
(See Fig.11 to 15)
Fig.13
Fig.12
Fig.11
Main board
LL
J
J
J
Arm
brackets (L)
Arm
brackets (R)
CN701 CN702 Rod gear
Arm brackets (L)
Arm brackets (R)
Main board
Rod gear
Bottom cover
K
Rear panel
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-8
Remove the two screws Land move the main board
backwards to release the two joints a. (The main
board will be removed with the rear panel and the
rear heat sink)
Remove the screw Mand Nattaching the rear heat
sink.
Remove the three screws Oand the screw P
attaching the rear panel. Remove the main board.
6.
7.
8.
Prior to performing the following procedures, remove
the top chassis, the motor bracket and the main
board.
Remove the two screws Qattaching the lifter switch
board.
1.
Removing the lifter switch board
(See Fig.16)
Fig.15
Fig.14
Fig.16
Joint a
Joint a Main board
Rear panel
OM
N
PRear heat sink
Bottom cover
Lifter switch board
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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KD-SH99
1-9
Prior to performing the following procedure, remove
the top chassis assembly and thefront panel
assembly.
Disconnect the flexible wire from connector CN702
on the main board.
Remove the four screws Rattaching the front
bracket on both sides of the body.
Push the pin of the joint con the front of the front
bracket to release the lock lever.
1.
2.
3.
Removing the lifter board
(See Fig.17 to 23)
Fig.17
Fig.18
Fig.19Fig.20
Front bracket
Main board
CN702
Front bracket
Front bracket
R
R
Lock lever
Front bracket
Joint c
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-10
Remove the screw Sattaching the lifter board cover
in the rear of the front bracket.
Release the two joints dwhile pushing the front side.
Move the lifter board cover inthe direction of the
arrow and release the eight joints e.
Remove the two screws Tattaching the lifter board
on the front of the body.
4.
5.
6.
Fig.21
Fig.22
Fig.23
Joints e
Joints e
Joints e
Joint e
S
Joint d
Joint d
Front bracket
Lifter board cover
Lifter board
Lifter board cover
T
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-11
Remove the four screws Uattaching the rear panel
to the front panel assembly.
Release the eleven joints fof the front panel and the
rear panel.
Disconnect the wire from connector CN503 on the
front board.
If necessary, unsolder connector CN502 on the front
board.
1.
2.
3.
4.
<Front panel assembly>
Removing the front board
(See Fig.24 and 25)
Prior to performing the following procedure, remove
the rear panel.
Remove the two screws Wattaching the volume
board.
Disconnect the volume knob, ring lens and volume
ring from the volume board.
If necessary, unsolder the volume board.
1.
2.
3.
Removing the volume board
(See Fig.25 and 26)
Prior to performing the following procedure, remove
the rear panel.
Disconnect the wire from connector CN503 on the
front board.
Pull out the line in board from the front panel
assembly.
1.
2.
Removing the line in board
(See Fig.25 and 27)
Prior to performing the following procedure, remove
the front panel assembly.
Fig.24
Fig.25
Fig.26
Fig.25
Joint f 11
Rear panel
U
U
U
U
Front board Soldering
(CN502) Soldering
Volume board
W
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V
V
CN503
Line in board
Rng knob
Volume lens, Volume ring
Volume board
Line in board
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-12
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
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TEL 13942296513 QQ 376315150 892498299
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KD-SH99
1-13
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 13942296513 QQ 376315150 892498299
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KD-SH99
1-14
Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor) and the CD mechanism assembly.
Remove the two screws Fand the feed motor
assembly.
1.
Removing the feed motor assembly
(See Fig.10)
Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor), the CD mechanism assembly and
the feed motor assembly.
Detach the FD gear part of the pickup unit upward.
Then remove the pickup unit while pulling out the
part iof the FD screw.
1.
Remove the screw Gattaching the nut push spring
plate and the pickup mount nut from the pickup unit.
Pull out the FD screw.
2.
Removing the pickup unit
(See Fig.10 and 11)
When reattaching the pickup unit,
reattach the part jof the pickup unit,
then the part iof the FD screw.
ATTENTION:
Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor), the CD mechanism assembly and
the feed motor assembly.
Turn up the CD mechanism assembly and remove
the two springs kon both sides of the clamper arms.
Open the clamper arm upward.
Turn the turn table, and remove the two screws H
and the spindle motor.
1.
2.
Removing the spindle motor
(See Fig.12 and 13)
Fig.10
Fig.11
Fig.12
Fig.13
Spindle motor
kk
Pickup unit
Part i
FD screw
Feed motor assembly
FD gear Pickup unit
Part j
F
Nut push spring plate
Pickup mount nut
Pickup unit
FD screw
G
H
H
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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KD-SH99
1-15
Adjustment method
Test instruments required for adjustment
1. Digital oscilloscope (100MHz)
2. AM Standard signal generator
3. FM Standard signal generator
4. Stereo modulator
5. Electric voltmeter
6. Digital tester
7.Tracking offset meter
8.Test Disc JVC :CTS-1000
9. Extension cable for check
EXTGS004-26P 1
Standard measuring conditions
Power supply voltage DC14.4V(11 V to 16V allowance)
Load impedance 4 (4 to 8 allowance)
Line-Out Level/Impedance 4.0V/20k load(fuull scall)
How to connect the extension cable for adjusting
Dummy load
Exclusive dummy load should be used for AM,and FM. For
FM dummy load,there is a loss of 6dB between SSG output
and antenna input.The loss of 6dB need not be considered
since direct reading of figures are applied in this working
standard.
Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
BBE : OFF
Frequency Band
FM 87.5MHz ~107.9MHz(with channel interval set to 200kHz)
FM 87.5MHz 108.0 MHz(with channnel interval set to 50kHz)
AM 530kHz ~ 1710 kHz(with channel interval set to 10kHz)
AM 531 kHz 1602 kHz(with channel interval set to 9 kHz)
EXTGS004-26P
EXTLX003-20PC
EXTLX003-20P
EXTLX003-2P
EXTLX003-7PC
EXTLX003-7P
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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http://www.xiaoyu163.com
KD-SH99
1-16
< Service mode >
The menu in the service mode can be switched with UP/DOWN.
The menu selected by the SEL button input is executed.
The ordinary mode
"UP" + "DOWN" + VR counterclockwise rotation.
DEL EEPROM EEPROM data all clear (changer is connected).
CH CH ERR CD changer error career call (changer is connected).
DELL CH ERR CD changer EEPROM clear (EEPROM career)
RUNNING CD CD running mode (Do not use in service).
RUNNING SH Running mode of front panel (Do not use in service).
DEL DATA CD ERROR MECHA ERR error career deletion.
CD ADJ R Self adjustment value call (It is a display switch with VR).
MEKACON WR Sub-microcomputer writing (Do not use in service).
TEMP DATA Temperature data call.
CD ERROR CD relation error career reading
MECHA ERR Panel relation error career reading
VERSION Microcomputer version confirmation.
The display changes in the up/down key.
The main microcomputer : SH99 J203
The Sub-microcomputer : SH99S 122
< Error display >
DISC_ERROR_0
DISC_ERROR_1
DISC_ERROR_2
DISC_ERROR_3
DISC_ERROR_4
DISC_ERROR_5
EJECT_ERR
Others
FOCUS NG
Self adjustment NG
CLV NG
TOC reading NG
or
MP3 FILE CHECK NG
BLANK DISC
Item Content
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
KD-SH99
1-17
<ERROR CODE of Panel mechanism>
Memory to EEPROM of 6 digits, 1st and 2nd digit are indicate the operation mode when occur the error,
3rd to 6th digit are indicate details of error.
LCD indication time is use lower 2digits of details of error.
This series is indicate ERR XX (XX is error code).
<ex.> When details of error is 0A0001 , it is indicate ERR 01, details of error is 0E0031 , it is ERR 31.
Switch is from this side sequentially PSW1, PSW2,.....PSW6.
Details of error Error code
1. Error of door open (fault of PSW1)
(1) Time out by PSW1 not changed
(2) PSW1 change during waiting 300ms after open position detected
2. Error of door close (fault of PSW6)
(1) Time out by PSW6 not changed
(2) PSW6 change during waiting 300ms after close position detected
3. Error of shift to DETACH position (fault of PSW5)
(1) Time out by PSW5 not changed to open side
(2) Shift to open side, pass the DETACH position then detect ANGLE1
(3) Time out by PSW5 not changed to close side
(4) Shift to close side, pass the DETACH position then detect close position
4. Error of angle adjustment
4-1 Shift to ANGLE1 (fault of PSW4)
(1) Time out by PSW4 not changed to shift for open side
(2) Shift to open side, pass the ANGLE1 then detect ANGLE2
(3) Time out by PSW4 not changed to shift for close side
(4) Shift to close side, pass the ANGLE1 then detect DETACH position
4-2 Shift to ANGLE2 (fault PSW3)
(1) Time out by PSW3 not change to shift for open side
(2) Shift to open side, pass the ANGLE2 then detect ANGLE3
(3) Time out by PSW3 not changed to shift for close side
(4) Shift to close side, pass the ANGLE2 then detect ANGLE1
4-3 Shift to ANGLE3 (fault PSW2)
(1) Time out by PSW2 not changed to shift for open side
(2) Shift to open side, pass the ANGLE3 then detect OPEN position
(3) Time out by PSW2 not changed for shift for close side
(4) Shift to close side, pass the ANGLE3 then detect ANGLE2
5. PSW fault condition at initialize
When all PSW is checked immediately after RESET, and the state of SWITCH which
cannot be originally is detected, it is displayed as ERR 00.
0A0001
0A0002
0B0006
0B0007
0C0011
0C0012
0C0013
0C0014
0D0021
0D0022
0D0023
0D0024
0E0031
0E0032
0E0033
0E0034
0F0041
0F0042
0F0043
0F0044
000000
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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KD-SH99
1-18
Flow until readingTOC of CD/CD-R/CD-RW
FEED RETURN
OFFSET SELF ADJUSTMENT
LASER ON
Pre SP KICK
LENS UP
FOCUS ON
THE SPINDLE START
TRAKING BALANCE
RF GAIN
FOCUS GAIN
TRACKING
TOC READING
1Tr. HEAD
Becomes DRVMUTE=H and the output of the IC604 driver becomes possible.
Picking up is moved to surroundings on the inside until becoming REST SW=L.
Afterward, moves in the direction of outer again and stops in the place in which
became REST SW=H.
FOCUS OFFSET, TRACKING OFFSET, and RF OFFSET are done, and
OFFSET of RF AMP in IC603 is corrected.
400ms turns the spindle motor before the focus search starts.
Lens UP of the pick is done. At this time, S character curve becomes about
2.0Vp-p by CTS-1000.
The down of the lens and FOCUS ONing are made.
Changes into CD-RW MODE, and serches for FOCUS in case of no FOCUS ON
even if FOCUS search(UP DOWN) is done three times.
The spindle motor is rotated up to the number of necessary rotations.
In the state of tracking OFF, do the self adjustment of wavy OFFSET of TE2 to 0.
It takes time to adjust the one with a large gap of the traking balance of picking up.
At this time, the racking error becomes about 2.8Vp-p by CTS-1000.
In the state of traking OFF, do the self adjustment of the RF level of RF(TP601)
to 1.0-1.2Vp-p. After adjusts,traking ON is done.
Do th eself adjustment of the gain intersection of the focus servo to 1.2kHz
(300ms).
Do the self adjustment of the gain intersection of the focus servo to 1.2kHz.
(300ms).
Time expands in DISC that the number of total tracks with CD-TEXT is a lot of.
It is a head of 1Tr., and the reproduction begins.
Shape of waves when based onVref(TP602)
FE
TP603
TE2
TP605
FEED
TP634
SP0
TP636
2.0Vp-p
2.8Vp-p
FE : Focus error signal
TE :T Tracking error signla
FEED : FEED deive signal
SPO : Spindle drive signal
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
KD-SH99
1-19
C612
C614
C615
C616
C617
C618
C644
C645
C671
C677
C678
C680
C841
C860
IC607
Q636
R634
R635 R638
R640
R664
R670
R671
R677
R678
R692
R852
R853
R876
X602
X603
R632
B10
B14
B15
C646
C647
R837
R843
R844
Adjustment part
RF
Vref
BZ791
C142
C143
C144
C161
C301
C302
C303
C305
C307
C308
C321
C350
C351
C352
C450 C451
C620 C621
C622
C623
C624
C625
C626 C627
C628
C629
C630
C631
C632 C633
C634 C635
C636
C637
C638 C639
C640
C641
C642
C643 C651
C653
C654
C669
C676
C679
C686
C687
C851
C852
C913
C916
C944
C945
C952
CN601
D942
IC603
IC604
IC605
IC606 IC803
IC804
IC805
IC806
IC941
L622
Q683
R855
Q941
R111
R134
R211
R620 R621
R624
R627
R629
R630
R631
R633
R636 R637
R639
R641
R642
R643
R644
R647
R649
R650
R651
R652
R653
R654
R655
R656R657
R658
R659
R660
R661
R662
R663
R665
R666
R667
R668
R669 R672
R673
R674
R675
R676
R687
R688
R689
R690
R691
R693
R694
R695
R696
R697
R698
R699
R941
R942
R944
X602
X603
R619
C304
R856
R857
R840
R838
R839
R877
RF shape of waves
TRD
FOD
TE
TE2
FE
FEED
SPO
1.0 1.2Vp-p
BZ791
C2 C4
C5
C7
C9
C25
C32
C34
C53
C55
C57
C81
C91
C103
C117
C120
C141
C142
C143
C144
C161 C162
C163
C164
C172
C173 C175
C203
C220
C241 C242
C243 C244
C272
C273
C301
C302
C303
C305
C306
C307
C308
C309
C310
C321
C323
C325
C327
C328
C329 C330
C331
C332 C333
C334
C350
C351
C352
C401
C402 C403
C405
C406
C407
C408
C409
C410
C450 C451
C452
C620 C621
C622
C623
C624
C625
C626 C627
C628
C629
C630
C631
C632 C633
C634 C635
C636
C637
C638 C639
C640
C641
C642
C643
C650
C651
C653
C654
C655
C656
C669
C676
C679
C686
C687
C708
C710
C713
C771
C791
C803
C804
C808
C811
C812
C814
C816
C821
C822
C824
C826
C851
C852
C912
C913
C915
C916
C921C922
C924
C926
C927
C928
C941
C943
C944
C945
C946 C947
C948
C949
C951
C952
C961
C962
C964
C965
C967
C968
C969 C971
C977
C978
C982
C986
C998
B1
CN301
CN302
CN601
CN701
CN702
CN703
CN705
CN771
CN901
D11
D111
D131
D161
D162
D231 D332
C657
R615
D701
D795
D796
D942
D961
D962
D964
D967
D986
IC51
IC171
IC301
IC322
IC323
IC401
IC601
IC602
IC603
IC604
IC605
IC606
IC608
IC701
IC703
IC771
IC801
IC802
IC803
IC804
IC805
IC806
IC911
IC941
IC951
IC961 J1
L1
L622
L851
Q34
Q35
Q81
Q91
Q131
Q132
Q231
Q232
Q683
R855
Q755
Q941
Q983
R83
R93
R111
R120
R131
R132
R133
R134
R143
R144
R161
R162
R163
R164
R211
R220
R231
R232
R233
R234
R243
R244
R277
R325
R327
R328
R329
R330
R331
R332
R336
R337 R340
R341
R342
R343
R344
R436
R437
R603R606
R620 R621
R623
R624 R625
R626
R627
R628
R629
R630
R631
R633
R636 R637
R639
R641
R642
R643
R644
R645
R646
R647
R648
R649
R650
R651
R652
R653
R654
R655
R656R657
R658
R659
R660
R661
R662
R663
R665
R666
R667
R668
R669 R672
R673
R674
R675
R676
R679
R680
R681
R682R683
R684
R685
R686
R687
R688
R689
R690
R691
R693
R694
R695
R696
R697
R698
R699
R702
R709
R713
R714
R715 R716
R717
R718
R719
R720
R721
R722
R723
R724
R725
R729
R736
R746
R757
R758
R759
R761
R762 R763
R764 R765
R766
R768
R770
R772
R773
R774
R775
R776
R777
R778
R779
R780
R781
R782
R797
R798
R811
R812
R813
R814
R821
R822
R823
R824
R851
R911
R941
R942
R944
R954
R961
R962
R963
R976
R977 R978
TH951
TU1
X51
X601
X602
X603
X701 X702
X801
D402
D408
D410
D412
D414
D416
PP2
PP1
D721
D722
D723
D724
D725
D726
D727
D728
D729
D730
R923
R924
R930
R619
D702
C721
C722
C917
C304
C404
L961
R830
R831
R832
R833
R834
R835
C817
C818
C819
C820
L852
R854
R817
R827
C809
R137
R138
R237
R238
R616
R617
R618
R614
B2
B3
D401
C723
C724
C725
C772
C714
R856
R857
R931
R932
R933
D912
D914
R840
R784
R783
C910
R838
R839
R964
R877
BZ791
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C21
C22
C23
C24 C25
C32
C51
C52
C53
C54
C56
C57
C81
C82
C84
C91
C92
C94
C103
C110
C112
C141
C142
C161
C162
C164
C172
C173
C174
C175
C203
C210
C212
C241 C242
C272
C273
C301
C302
C303
C305
C306
C307
C308
C309
C310
C321
C323
C325
C329
C336
C337
C350
C351
C352
C401
C402
C403
C405
C406
C407
C408
C409
C410
C450
C451
C452
C601
C602
C603
C604
C605
C606
C609
C610
C611
C612
C613
C614
C615
C616
C617
C618
C619
C644
C645
C652
C653
C660
C671
C677
C678
C680
C701
C702
C703 C704 C705
C707
C708
C710
C711
C712
C713
C719
C754
C791
C803
C804
C805
C806
C807
C808
C815
C816
C825
C826
C841
C853
C860
C861
C862
C863
C864
C866
C876
C878
C901
C911
C912
C913
C914
C915
C916
C923
C925
C931
C941
C943
C944
C945
C952
C961
C962
C964
C965
C966
C967
C969
C971
C972
C973
C977
C978
C982
C990 C991 C992 C993
C994
C995
C996
C997
CN301
CN302
CN703
CN704
CN705
CN771 CN901
D1
D2
D711
D754
D941
D961
D963
D978
D980
IC607
IC702
IC941
IC961
J1
L601
L701
R999
Q1
Q11
Q12
Q13
Q22
Q23
Q24
Q32
Q33
Q161
Q321
Q322
Q323
Q423
Q636
Q641
Q701
Q791
Q942
Q965
Q966
Q977
Q979
Q986
R1
R2
R3
R4
R5
R10
R11
R12
R13
R14
R15
R21
R22
R23
R24
R25
R26
R27
R28
R32
R33
R34
R35
R51
R52
R53
R54
R81
R82
R91
R92
R118
R119
R135
R136
R141
R142
R145
R146
R165
R166
R167
R172
R173
R174
R175
R176
R177
R178
R218
R219
R235
R236
R241
R242
R245
R246
R272
R273
R274
R275
R276
R301
R302
R303
R304
R305
R333
R334
R335
R338
R339
R351 R352
R401
R402
R403
R404
R405
R435
R601
R602
R604
R605
R607
R608 R609
R610
R611
R612
R613
R622
R634
R635 R638
R640
R664
R670
R671
R677
R678
R692
R701
R703
R705
R706
R707
R708
R710
R711 R728
R730
R731
R732
R733 R734
R735
R737
R738
R739
R740
R741
R742
R743
R745
R747 R748
R751 R753 R754
R755
R767
R769 R791
R792
R793
R794
R795
R796 R852
R853
R860
R861
R862
R863 R864
R865
R866
R867
R868
R869
R870
R871
R872
R874
R876
R912
R943
R951
R961
R968
R969
R970
R971
R975
R984
R985
R986
R987
TU1
X51
X601
X602
X603
X701
X702
X801
C942
R836
CN602
D404
D406
PP2
PP1
R922
R925
R926
R927
R928
R632
R859
R929
R841
R726
R36
L961
C820
R815
R816
R825
R826
C809
L606
D965
R965
B606
B4
B5
B6
C40 C41
C42 C43
C44
C45
C46
C47
B7
B8
B9
C48
L51
C918
B10
R727
D403
D405
D407
D409
D411
D413
D415
B11
B12
B13
B14
B15
B16
C792
C714
D911
D913
C726
C706
C49
C11
C987
C773
C774
C755
Q51 Q52
R55
R56
C646
C647
C910
R913
B17
B18
R837
C715
R842
R843
R844
Q642
Main board
(Forward side)
Main board
(Reverse side)
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0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
KD-SH99
1-20
Maintenance of laser pickup
(1) Cleaning the pick up lens
Before you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.
(2) Life of the laser diode
When the life of the laser diode has expired,
the following symptoms will appear.
(1) The level of RF output (EFM output:ampli
tude of eye pattern) will be low.
Replacement of laser pickup
Is RF output
0.8 Replace it.
NO
YES
O.K
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed
circuit board which is attached to the pickup
is used to adjust the laser power.Since this
adjustment should be performed to match the
characteristics of the whole optical block,
do not touch the semi-fixed resistor.
If the laser power is lower than the specified
value,the laser diode is almost worn out, and
the laser pickup should be replaced.
If the semi-fixed resistor is adjusted while
the pickup is functioning normally,the laser
pickup may be damaged due to excessive current.
Turn off the power switch and,disconnect the
power cord from the ac outlet.
Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)
Plug the power cord in,and turn the power on.
At this time,check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at measures
between TP601 and TP602.
Finish.
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9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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