Kenwood X92-4400-0 Series User manual

© 2003-6 PRINTED IN JAPAN
B53-0052-00 (N)3365
DVD MECHANISM ASSY
SERVICE MANUAL
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
DVD UNIT
ROLLER LEVER ASSY
DISC GUIDE ASSY
MAIN CHASSIS ASSY
CLAMP CHASSIS ASSY
OUTER CHASSIS ASSY
FRONT CHASSIS ASSY
DAMPER x 4
FLOATING SPRING x 4
CONSTRUCTION OF MAJOR PARTS
DESCRIPTION MECHANISM
X92-4400-00 (DVS-3000) :
X92-4400-01 (DVS-3001) :
X92-4730-00 (DVS-3010) :
X92-4730-01 (DVS-3011) :
X92-4740-00 (DVS-3020) :
X92-4740-01 (DVS-3021) :
X92-4740-02 (DVS-3022) :
X92-4740-03 (DVS-3023) :
X92-4750-00 (DVS-3030)
X92-4750-01 (DVS-3031)
X92-4750-02 (DVS-3032)
X92-4750-03 (DVS-3033)

2
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
MODEL NAME X92-4400-00 X92-4400-01 X92-4740-00 X92-4740-01 X92-4740-02 X92-4740-03
MECHANISM NAME DVS-3000 DVS-3001 DVS-3020 DVS-3021 DVS-3022 DVS-3023
X37 X37-1020-00 X37-1020-00 X37-1020-00 X37-1020-00 X37-1020-00 X37-1020-00
PICKUP T25-0222-05 T25-0222-05 T25-0222-05 T25-0222-05 T25-0222-05 T25-0222-05
DVD ™™™™™™
CD ™™™™™™
DISC PROTECTION MECHANISM ×™××™™
EXPORT PACKING SPECIFICATION ×××™×™
DESTINATION A0 A1 A2 A3 A4 A5
MODEL NAME X92-4730-00 X92-4730-01 X92-4750-00 X92-4750-01 X92-4750-02 X92-4750-03
MECHANISM NAME DVS-3010 DVS-3011 DVS-3030 DVS-3031 DVS-3032 DVS-3033
X37 X37-1020-01 X37-1020-01 X37-1020-01 X37-1020-01 X37-1020-01 X37-1020-01
PICKUP T25-0299-05 T25-0299-05 T25-0299-05 T25-0299-05 T25-0299-05 T25-0299-05
DVD ™™™™™™
CD ××××××
DISC PROTECTION MECHANISM ×™××™™
EXPORT PACKING SPECIFICATION ×××™×™
DESTINATION B0 B1 B2 B3 B4 B5
DVD MECHANISMTABLE
Grease Name Ref. No. Description Application position
1CHASSIS MOLD GEAR CONTACT POINT
2CHASSIS PICKUP CONTACT POINT
15 SLIDER GEAR CONTACT POINT
30 CAM ARM ASSY (21) CONTACT POINT
CFD-703ZA (BLUE) 33 GEAR GEAR WHOLE
34 GEAR GEAR WHOLE
35 GEAR GEAR WHOLE
36 GEAR GEAR WHOLE
37 GEAR GEAR WHOLE
38 GEAR GEAR WHOLE
PFD-602Z 1 CHASSIS SLIDER (17, 18) & LOCK ARM (25, 26) CONTACT POINT
KW-223 VM3 SLED MOTOR GEAR WHOLE
HF-30 44 SHAFT SHAFT WHOLE
USE GREASETABLE

3
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
BLOCK DIAGRAM
DVD MECHANISM ASS'Y
( X92-4400-0x : DVS-300x / X92-4740-0x : DVS-302x )
UNIT
LOADING SW
DVD UNIT (X37-1020-00)
VM1
SPINDLE
MOTOR
DISC
OPTICAL LASER
PICKUP
LD(650nm,780nm)
VPU1
STEPPING MOTOR
2 PHASE
CN1 :
30PIN
CN3 :
11PIN 4PIN
CN2 :
MOTOR &
DRIVER
ACTUATOR
IC6
FEED
VM2
MOTOR
LA6505
5V AVR.
Q6
M
MOTOR
LOADING
VM3
IC7
PROCESSOR
FRONT END
AN8703FH
IC1
IC2
IOP
DET
MICROPROCESSOR
DF2328VTE25Q5TH1
THERMISTER
EEPROM
IC11
S-24C04BMFN
Q1,2,4,5
HD74LV2G66A
ANALOG SW
IC4
OPTICAL DISC
CONTROLLER
MN103S26E
S-80829CLBB
IC5RESET IC
CN4 :
50PIN
4PIN
CN4 :
4PIN S4 : DOWN SW
S5 : SLT 3.3V REG
NJM2880U33
IC10
D3.3V
A3.3V
D5V
A5V
1.8V REG
UPC2918T
IC9
1.8V
VOLTAGE DET
S-80815CLBB
IC8
to
MAIN
UNIT
Tr
APC
U.V.W COIL
HALL BIAS
HALL SENSOR
DVD LD/CD LD
VC(2.2V)
MD(DVVD/CD)
I/V OUT(DVD/CD)
FO+/-,TR+/-
HFM VCC
A5V
PD VCC
PWMx2
7V
BTLx2
8
3PWM
SOFT-SW
7V
VHALF(1.65V)
FG
D/A
SLED
MUTE
LO/EJECT
DRV1.65 A/D
(DVD ONLY)
2
A5V
to A/D
5V
A3.3V
A/D
A/D
A/D
IOP DET
VHALF(1.65V)
SDA SCK EEPON WP
D3.3V
4
SEN STBY STDIO SCK
7
4
BALANCE TRANSFER
HFM ON
VHALF(1.65V)
NARF
TSTSG
VHALF(1.65V)
TRCRS
TE
TRDRV
ARF
JLINE
FBAL
TMBAL
FE
OFTR
RFENV
AS
BDO
VREF2
FODRV
SPDRV
FG
CLKOUT NRESET A0-A17 D0-D7 XWR XINT0 CPU IREQ XCS XRD XINT1 XWAIT ODC MON(TZC,OFTR,DRDT)
18 8 3 4
16.897849MHz
RESET
DATA BUS
ADDRESS BUS
MONITOR
D3.3V
D5V A3.3V 1.8VD3.3V
16.897849MHz
X1
NRST
D3.3V
S/P DIF
AUDIO OUT
ATAPI IF
5V
7V
DISC DET
A
B
C
D
4
SW SW
ON/OFF
A5V

4
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x BLOCK DIAGRAM
DVD MECHANISM ASS'Y
( X92-4730-0x : DVS-301x / X92-4750-0x : DVS-303x )
UNIT
LOADING SW
DVD UNIT (X37-1020-01)
VM1
SPINDLE
MOTOR
DISC
OPTICAL LASER
PICKUP
LD(650nm)
VPU1
STEPPING MOTOR
2 PHASE
CN1 :
30PIN
CN3 :
11PIN 4PIN
CN2 :
MOTOR &
DRIVER
ACTUATOR
IC6
FEED
VM2
MOTOR
LA6505
5V AVR.
Q6
M
MOTOR
LOADING
VM3
IC7
PROCESSOR
FRONT END
AN8703FH
IC1
IC2
IOP
DET
MICROPROCESSOR
DF2328VTE25Q5TH1
THERMISTER
EEPROM
IC11
S-24C04BMFN
Q2,4,5
HD74LV2G66A
ANALOG SW
IC4
OPTICAL DISC
CONTROLLER
MN103S26E
S-80829CLBB
IC5RESET IC
CN4 :
50PIN
4PIN
CN4 :
4PIN S4 : DOWN SW
S5 : SLT 3.3V REG
NJM2880U33
IC10
D3.3V
A3.3V
D5V
A5V
1.8V REG
UPC2918T
IC9
1.8V
VOLTAGE DET
S-80815CLBB
IC8
to
MAIN
UNIT
Tr
APC
U.V.W COIL
HALL BIAS
HALL SENSOR
DVD LD/CD LD
VC(2.2V)
MD(DVVD/CD)
I/V OUT(DVD/CD)
FO+/-,TR+/-
HFM VCC
A5V
PD VCC
PWMx2
7V
BTLx2
8
3PWM
SOFT-SW
7V
VHALF(1.65V)
FG
D/A
SLED
MUTE
LO/EJECT
DRV1.65 A/D
(DVD ONLY)
2
A5V
to A/D
5V
A3.3V
A/D
A/D
A/D
IOP DET
VHALF(1.65V)
SDA SCK EEPON WP
D3.3V
4
SEN STBY STDIO SCK
7
4
BALANCE TRANSFER
HFM ON
VHALF(1.65V)
NARF
TSTSG
VHALF(1.65V)
TRCRS
TE
TRDRV
ARF
JLINE
FBAL
TMBAL
FE
OFTR
RFENV
AS
BDO
VREF2
FODRV
SPDRV
FG
CLKOUT NRESET A0-A17 D0-D7 XWR XINT0 CPU IREQ XCS XRD XINT1 XWAIT ODC MON(TZC,OFTR,DRDT)
18 8 3 4
16.897849MHz
RESET
DATA BUS
ADDRESS BUS
MONITOR
D3.3V
D5V A3.3V 1.8VD3.3V
16.897849MHz
X1
NRST
D3.3V
ATAPI IF
5V
7V
DISC DET
A
B
C
D
4
SW SW
ON/OFF
A5V

5
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
●DVD UNIT (X37-1020-00/01)
Ref. No. Component Name Application/Function/Operation/Condition
IC1 AN8703FH RF signal processor
IC2 NJU7042 IOP detector OP amp
IC4 MN103S26E ATAPI interface, Servo/Spindle/Seek control, DVD ROM/CD ROM digital signal processor, 2M DRAM
IC5 S-80829CLBB System reset IC
IC6 LA6505 Motor & pickup actuator driver
IC7 DF2328VTE254Q8 System microprocessor
IC8 S-80815CLBB Voltage detector
IC9 UPC2918T 1.8V AVR
IC10 NJM2880U33 3.3V AVR
IC11 S-24C04BMFN Backup memory (EPROM)
IC12 HD74LV2G66A Servo filter on/off control
Q1 2SB0970 Laser diode power supply for CD (APC)
Q3 2SJ0536 Laser diode power supply for DVD (APC)
Q4 UN5114 DVD laser high frequency superposition circuit on-switch
Q5 UN5214
Q6 2SD1819A 5V AVR
Q9 UN5114 Loading motor control ( base L= ON )
Q10 UN5214 Loading motor control ( base H= ON )
Q13 UN5114 EEPROM power control (base L = ON )
Q15 UN5114 FG signal inverter transistor
COMPONENTS DESCRIPTION
●System microprocessor : DF2328VTE254Q8 (DVD unit IC7)
Pin No. Pin Name I/O Purpose / Description / Processing / Operation
1Vcc - Power supply input terminal
2~5 A0~A3 O Address bus
6Vss - GND
7~14 A4~A11 O Address bus
15 Vss - GND
16~21 A12~A17 O Address bus
22 M2 I SODC monitor input terminal 2
23 (NC) - NC
24 Vss - GND
25 SW_AD I SW_A+D detect input terminal
26 SW_B I SW_B detect input terminal
27 SW_C I SW_C detect input terminal
28 M3 I SODC monitor input terminal 3
29 (NC) - NC
30 NINT0 I SODC interrupt signal 0 input terminal
31 NINT2 I SODC interrupt signal 2 input terminal
32 NINT1 I SODC interrupt signal 1 input terminal
MICROCOMPUTER’STERMINAL DESCRIPTION

6
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
Pin No. Pin Name I/O Purpose / Description / Processing / Operation
33 Vcc - Power supply input terminal
34~37 (NC) - NC (PULL UP)
38 Vss - GND
39~42 (NC) - NC (PULL UP)
43~46 CPUDT0~3 I/O DATA bus
47 Vss - GND
48~51 CPUDT4~7 I/O DATA bus
52 Vcc - Power supply input terminal
53 (NC) - NC
54 (NC) I/O Flash memory data output terminal
55 (NC) - NC
56 (NC) I Flash memory data input terminal
57 _LOADP O Loading control terminal (* Please see for Table of Loading/Eject Logic )
58 (NC) - NC
59 Vss - GND
60 SEL0 I Destination select input terminal (* Please see forTable of Destination )
61 SEL1 I Destination select input terminal (* Please see forTable of Destination )
62 LOADM O Loading control terminal (* Please see for Table of Loading/Eject Logic )
63 LO_MUTE O Loading driver muting control terminal (* Please see forTable of Loading/Eject Logic )
64 SL_MUTE O Sled driver muting control terminal
65 DRV_MUTE O Driver muting control terminal
66 FG I FG signal input terminal
67 M0 I SODC monitor input terminal 0
68~70 (NC) - NC
71 FWC I/O Flash memory data writhing control terminal
72 FWE I Flash memory data writhing control terminal
73 _RES I Reset signal input terminal
74 (NC) - NC
75 _STBY I Standby signal input terminal
76 Vcc - Power supply input terminal
77 XTAL I System clock input terminal (16.897849MHz)
78 EXTAL I System clock input terminal (16.897849MHz)
79 Vss - GND
80 (NC) - NC
81 Vcc - Power supply input terminal
82 (NC) - NC
83 _RD O Read signal output terminal
84 _HWR O Write signal output terminal
85 (NC) - NC
86 _WAIT I Request for wait statement input terminal
87 EEPON O EEPROM power supply control terminal
88 WP O EEPROM WP control terminal
89 SCL O EEPROM clock output terminal
90 SDA I/O EEPROM data input/output terminal
91 HFM O DVD laser high frequency superposition circuit control terminal
92 (NC) - NC
MICROCOMPUTER’STERMINAL DESCRIPTION

7
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
Pin No. Pin Name I/O Purpose / Description / Processing / Operation
93 AVcc - A/D converter Power supply input terminal
94 Vref - A/D converter reference voltage input terminal
95 TEMP_DET I Temperature sensor input terminal
96 (NC) - NC
97 IOP I IOP monitor terminal
98 (NC) - NC
99 VHALF I Reference 1.65V input terminal
100 DRV_HALF I Drive 1.65V input terminal
101 STEP_A O Sled motor control terminal A
102 STEP_B O Sled motor control terminal b
103 AVss - A/D converter GND terminal
104 Vss - GND
105 STDI O FEP serial data output terminal
106 SCK O FEP serial clock output terminal
107 SEN O FEP tip enable output terminal
108 STBY O FEP standby output terminal
109 (NC) - NC
110 M1 I SODC monitor input terminal 1
111 (NC) - NC
112 CEON O Servo output terminal
113 MD0 I Mode setup of operation input terminal
114 MD1 I Mode setup of operation input terminal
115 MD2 I Mode setup of operation / Flash memory writhing input terminal
116 SW_F I SW_F detect input terminal
117 SW_E I SW_E detect input terminal
118 SW_AD I SW_A+D detect input terminal
119 NCS O SODC chip select
120 (NC) - NC
● Loading/Eject LogicTable
Pin No. Pin Name Hi-Z Short-Brake CW CCW
57 _LOADP H H L H
62 LOADM L L L H
63 LO_MUTE L H H H
● DestinationTable
DESTINATION
Pin No. DVD/CD DVD only
60 H L
61 H H
MICROCOMPUTER’STERMINAL DESCRIPTION

8
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
CONSTRUCTION OF MAJOR PARTS
This mechanism consists of five units.
1. Main chassis assy (Maintenance of a disc and reading of
signal)
2. Roller lever assy (Disc loading)
MECHANISM OPERATION EXPLANATION
3. Disc guides assy (Maintenance and positioning of a disc
and the crack to disc is prevented)
4. Outer chassis assy (The damper unit which protects disc
playback operation from external vibration)
5. DVD unit (Control for DVD mechanism)
DVD UNIT
Outer chassis assy
Front chassis assy
Disc guide assy
Damper x 4
Roller lever assy
Clamp chassis assy
Main chassis assy
Floating spring x 4
OPERATION EXPLANATION
■Disc Loading
• Turning the loading switch ON
When a disc is inserted in the mechanism that the detection
sliders will be open to the left and right side and the loading
switch B or C is ON. The above starts the loading motor rota-
tion.
Note: In the case of 12cm disc, all switches (A, B, C, and D)
turn on and 12cm disc distinction is carried
ABCD
Detection slider (L) Detection slider (R)
Disc
ON ON
Disc loading sw

9
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
■Loading the disc
When the loading motor starts rotation, the worm gear also
starts to turn as shown in the figure.
The rotation force is transmitted to the gear train.
When the force is transmitted to the final gear, the pull in the
disc for the mechanism.
VM3 : Loading
motor assy
Roller
Disc
Detection slider (L)
Detection slider (R)
Disc
Disc out
Disc in
Roller
Disc guide
The disc is pulled in or out when the rollers are pushed against
the disc guide.
■Operation ofTrigger arm
When the rollers pull in the disc, the disc edge (disc outer
shape) pushes the trigger arm and rotates it.
Disc
INITAL POSITION
Clamper chassis
Trigger arm center of rotation
Press of disc outer shape
BASIC CONSTRUCTION
The following figure is looked at the mechanism for the re-
verse-side.
Even after the disc has been inserted, loading switch is ON
and the loading motor and the gear train also rotated. Al-
though the gear train is rotating but it has not contact yet in the
loading mechanism part.
The trigger slider becomes starting point of operation.
Trigger slider Rear lock arm
Pinion gear
Loading slider
Drive arm
Lock slider
Lock arm (R) Lock arm (L)
■Operation of the trigger slider and construction
of the loading slider
When the pinion gear is rotating but trigger slide has not con-
tact to the rack gear.
The loading slider is assembled with the trigger slider and
pushed in the direction of the arrow by force of the spring.
Trigger slider
Rack gear
( * inside of
trigeer slider)
Pinion gear
Not contact with
Trigger slider
between
Rack gear
Pinion gear
Loading slider
Trigger slider
Spring
MECHANISM OPERATION EXPLANATION

10
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
■ Initial operation of the trigger slider
When the pressure of the disc rotates the trigger arm, the trig-
ger arm (part of A position) pushed the trigger slider (part of B
position).
12cm Disc
AA
B
Trigger arm
Center of rotation
Disc
■ Operation of the trigger slider (contact with pinion gear)
When the trigger arm pushes the trigger slider and goes, the
rack gear of the trigger slider will be contact with pinion gear
that has already rotated.
The trigger slider (lack gear) moved out synchronization of
causes the pinion gear to rotate.
Trigger arm
A
Contact with trigger
slider (rack gear)
and pinion gear
■ Operation of the loading slider
When the trigger slider begins to move out for arrow side, the
boss part of the trigger slider will push the loading slider and
will move the loading slider.
Loading slider
Boss
Boss
Trigger slider
Boss
FLOW UNTIL DISC CHUCKING
(Playback standby condition)
Operation modes:To play back to DISC it is required to per-
form flow of operations as shown below.
q Moving the disc clamper downwards so that it can clamp
the disc during playback (disc chucking)
w Moving the rollers that are in contact with the disc
(Lowering the roller lever and stopped)
e Float (suspend) the mechanism assy in order to protect it
from external vibrations during disc playback
r Disc playback standby mode (series of completion of operation)
t Moving the optical pickup assy so that if can read
the disc signals.
The movement of the loading slider activates these series of
operations.
MECHANISM OPERATION EXPLANATION

11
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
Clamp lever assy
1
3
2
Drive arm
Loading slider assy
S4 : Down SW
VM3 : Loading
motor assy
Roller lever assy
■ Coupling condition
The parts used for performing the above functions are coupled
with the loading slider as shown below.
qMoving the clamp lever assy downward part
wMoving the roller lever assy downward part
eThe down switch (For controled loading motor drive)
■ Operation of the clamp lever assy (Disc chucking)
• Contact condition
The plate spring attached to the clamp lever assy is originally
contacted with groove on loading cam. The loading cam and
loading slider fixed on the screw.
Clamp lever assy
Loading slider assy
spring
Loading cam
INSIDE VIEW
• Lowering the clamp lever assy (for disc chucking)
As loading slider moves for arrow side, the plate spring sec-
tion contact with it moves along its groove and lowers the clamp
lever assy.
Clamp lever assy
Loading slider assy
Position of clamp
lever assy (boss)
Clamper
Initial position
Final position of disc clamp
Center of
rotation
■ Lowering the roller lever assy
(disc chucking completion position)
1) When the disc in this position, the roller lever assy are lo-
cated be low the contact with it. To rotate the disc for play-
back, it is required so separate the roller from the disc.
Clamp lever assy
Roller
Disc
MECHANISM OPERATION EXPLANATION

12
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
3) Lowering the roller(disc playback position)
The pin of the roller lever ASSY is connected with the tip
part of the drive arm, and it is pushed out front side for the
drive arm.
As the roller lever assy rotation was stopped when it was
separate to the middle gear.
Come down of roller lever assy
Disc Clamp lever assy
Roller
MECHANISM OPERATION EXPLANATION
2) Operation of drive arm
The pin to the drive arm is originally contacted with groove
on loading slider cam.
As the loading slider moves for arrow side, drive arm pin
contact with groove on the loading slider moves along the
groove.
Stop
Cam
Loading
slider
Drive arm
Pin
Pin
(roller lever assy)
Center of
rotation
Center of
rotation
RIGHT SIDE VIEW
Pin Draive arm
Relay gear
Stop of the roller
(come away roller gear) Final position of
roller lever assy
■ Floating position and lock position of the mechanism
The disc is loaded and ejected by rotation of the rollers that
come in close contact with the disc. After the rollers have
pilled the disc in, its position should be adjusted so that it can
be placed precisely on the turntable of the traverse chassis.
To make this possible, the traverse chassis and outer chassis
should be in the locked condition.
Since the outer chassis is originally locked on the main unit, if
the traverse chassis is also locked during play back, the disc
would be subjected directly to vibrations of vehicle during driv-
ing and disc signal would be hindered, making the audio inter-
mittent or impossible to be played. To prevent such a problem,
the traverse chassis is suspended from the outer chassis us-
ing springs and rubber dampers during driving. The position-
ing protects the disc playback operations and referred to as
the floating position.
• Operation of Lock arm (L), (R)
The lock arm (L) and (R) are contact to the boss of the main
chassis, respectively, and are contact the pin into the slot of
the lock slider. If the lock slider operates by operation of the
drive arm, the pin which is contact the portion into which the
lock arm (L) and (R) are contact the main chassis into the slot
of the lock slider as a rotational center will operate. The lock
arm (L) and (R) carry out rotation operation now, respectively.
Lock slider
Pin Pin
Contacr to chassis
Lock arm (R) Lock arm (L)
Lock arm (R)
Lock arm (L)
Drive arm
Drive arm (pin) press of
the lock slider

13
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
• Floating position and mechanism lock position
This mechanism has to two-lock system for front and rear part.
1) Lock arm for lock and release function
The lock arm (L) and (R) enter into the plate spring portion of
the front chassis assy, and position regulation of the front part
is carried out.
If the lock arm (L) and (R) carry out rotation operation by op-
eration of the drive arm, and operation of the lock slider, it will
separate from the plate spring portion and will become re-
lease position (floating position).
outer chassis assy
REAR SIDE
Front chassis assy
FRONT SIDE
Rear lock arm
Main chassis assy
Lock arm (L)
Lock arm (R)
Lock slider Drive arm
Lock position
Front chassis assy (Front side view)
Plate spring
Release position
Center of rotation
MECHANISM OPERATION EXPLANATION
2) Rear lock arm for lock and release function
The rear lock arm is pinched between the outer chassis and
the main chassis, and position regulation of the back part is
carried out. It becomes a release position (floating position)
by the rear lock arm operating by rotation operation of the
drive arm, and separating from the outer chassis.
Outer chassis
Main chassis
Rear lock arm
Draive arm
REAR SIDE
Center of rotation

14
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
■Removing the outer chassis assy (4)
1) Removing the front chassis assy (6 or 7:2 screws).
2) Removing the stopper (48: 1 screw).
3) Removing the floating spring (60: 4 pcs).
4) Push up to fixed boss at the damper (50) used the tip of
+driver and turns around remove the damper (50: 4 pcs).
60
48
60
60
6 or 7
50
OUTER CHASSIS
ASSY (4)
DISASSEMBLY AND ASSEMBLY OF MECHANISM
■ Removing the disc guide assy (79)
1) Removing the 3 screws.
2) Take out the disc guide (79) it shifts to the front side and
removes. It warns against damaging the guide of the slider
(17 and 18).
17
18
DISC GUIDE (79)
■ Removing the clamp lever assy (21)
1) The clamp lever assy (21) is stood and it shifts upward and
removes.
CLAMP LEVER ASSY (21)

15
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
3
2
■ Removing the roller lever assy (20)
When removing the roller lever assy that it is removed before-
hand for the rod (77) and screw (H) of disc protection mecha-
nism.
1) Removing to the spring (59 and 63).
2) The roller lever ASSY (20) is stood and it removes upward.
Note:The rod (77) and the screw (H) are not reusable. Please
be sure to exchange.
63
59
ROLLER LEVER ASSY (20)
■ Repair for Optical Laser pickup (VPU1)
When you change the Optical Laser pickup (VPU1) you must
be used adjustment jig and cam change jig are required. And
please change the cam (29:2 pcs) and the shaft (44) simulta-
neously.
• Disassembly
1) The lands for LD protection of the Optical Laser Pickup is
short-circuited with solder (2 points) and the flexible code
is removed from the connector.
2) The screw for adjustment (A) is removed (1 screw).Is care-
ful not to lose the floating spring (56: 3 pcs).
3) Removing the chassis (3) (5 scews: B) and the traverse
chassis ASSY
4) Removing the pickup arm (22) (1 screw: E).
Note: The screw for pickup arms (E) is not reusable. Please
be sure to exchange.
DISASSEMBLY AND ASSEMBLY OF MECHANISM
• Assembly
Preparation:The Optical Laser pickup (VPU1), cam (29:2 pcs)
and the shaft (44) are assembled with cam press fit jig.
Grease (HF-30) is applied to the shaft.
1) The pickup arm (22) is fixed in the Laser pickup. The screw
(E) carries out screw lock.
2) It assembles in a procedure contrary to disassembly. The
adjustment screw is rough-adjust so that the upper surface
of the traverse chassis (2) and the upper surface of chassis
(3) may turn into the same position.
Note: Please read to mechanical adjustment along with the
manual of adjustments jig.
LD SHORT LAND
3
A
B
B
B
B
B
56
56
56
TRAVERSE
CHASSIS
ASSY
E
PICKUP ARM

16
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
■ Repair for Spindle motor (VM1)
• Disassembly
1) Removing to 3 screws (B) and Spindle motor (VM1).
• Assembly
1) When the fixed position of the spindle motor (VM1) is im-
perfect, the CD disc play ability is poor for the unit. Please
be sure to fixed spindle motor position.
2) The tip of the minus driver is put into the portion of A, the
spindle motor press of direction of side B, and the screw is
fixed in order of 1, 2, and 3.(Torque 3±10% kgf.cm)
VM1
1
2
3
1
3
A
2
B
A
■ Removing the slider (17 and 18)
1) Removing the spring (62).
2) Move the slider (18) in the center of main chassis (1).
It gets over the slider for the boss of the main chassis (1).
Note: Right side (17) same as disassembly for left side (18).
62 62
SLIDER (18)
SLIDER (18)
■ Removing the Loading Motor (VM3)
1) The lead (2 places) of the loading motor (VM3) is removed.
2) The washer (J:2 pcs) and loading motor (VM3) is removed.
Note: Be careful of direction of the gear (36, 37, 38) and an
axis at the time of assembly.
The washer (J) for bracket that has stopped the loading motor
(VM3) is not reusable.
When you remove, please be sure to exchange.
VM3
J
J
37
38
36
46
38
■ Removing the DVD unit (PCB)
1) The lands (2 points) for LD protection of the Optical Laser
pickup is short-circuited with solder.
2) The connector (4 places), the lead (2 places) grand land
for loading motor, and the screw (2 pcs) are removed.
LD SHORT LAND
DVD UNIT
VM2
BB
VFC1
VM2
VM1
DISASSEMBLY AND ASSEMBLY OF MECHANISM

17
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
■ Disassembly for loading cam (30) drive arm (19),
lock slider (23), and rear lock arm (24)
1) The screw (D) and the loading cam (30) are re-
moved.
Note: The screw for loading cam (D) is not reus-
able. Please be sure to exchange.
2) The spring (58) for trigger sliders is removed.
3) The stopper (49) is removed.
4) The spring (64) of the rear lock arm (24) is re-
moved.
5) The screw (B) and washer (K) of the drive arm
(19) are removed, and the drive arm (19) is
moved back to rear side. The drive arm (19) is
removed.
6) Lock arm (25 and 26), lock slider (23), rear lock
arm (24) and each gear is removed.
19
23
25
26
64
24
D
58
1
49
B
35
33
32
34
65
BK
16 15
LOADING CAM (30)
7) The loading slider (16) is fixed on the washer (K) and the
screw (B).(Torque 3±10% kgf.cm)
8) The lock arm (25 and 26) is closed by hand and the lock
slider (23) is moved for close position, and the stopper
(49) is fixed on the screw (B). (Torque 3±10% kgf.cm)
9) The loading cam (30) is fixed on the screw (D). (Torque
1.5±10% kgf.cm)
10) The spring (58) is fixed to the trigger slider (15) and the
loading slider (16).
11) The spring (64) is fixed to the rear lock arm (24).
19
K
B
D
30
58
64
24
16
15
65
23
1
■ Assembly for the loading cam (30) drive arm (19),
lock slider (23), and rear lock arm (24)
1) The trigger slider (15) is fixed in the main chassis (1), and
is moved back to rear side.
2) The loading slider (16) is fixed to the trigger slider (15).
Note: At this time, it is cautious of the position of the hook
of the loading slider (16).
3) The gear (4 pcs) is fixed in main chassis (1).
4) The lock arm (25 and 26) and the rear lock arm (24) are
fixed.
5) The spring (65) is covered over the lock slider (23). The
spring (65) is assembled with through for a main chassis
(1) hole. It takes care that the spring (65) does not run
aground to the lock slider (23).
6) The loading slider (16) is moved back to the rear side.The
lock arm (25 and 26) moving to OPEN position, and the
drive arm (19) is fixed (Put in seven places boss).
DISASSEMBLY AND ASSEMBLY OF MECHANISM

18
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
ABCDE
1
2
3
4
5
6
7
X37-1020-0x
IC Q Address
57C
76D
86E
95E
10 7E
11 5C
12 5D
96D
10 5D
13 5C
R142
R141
C116
R109
R71 C104
CP3
C98
R138 R82
CP12
C117
L3
R143 R73
R79
R78
C133
CP13
C93 R132 CP16
R75
R74
R77
C134 C129
R91
R90
R134 CP11
C31
C14
X85
C130
C101
L22
L23
L26
R72
C90 C91
R83
R139
R140
R110
C132R137
R136
R81
R80
L27
C92
C60
CP15
R76
C94L24
C131
C95
R133
R101
R93
C99
R107
R108
R135
R99
C102 C103
C97 C96
L25 C100 L1
D8
D7
S5
S4
DVD UNIT
X37-1020-0x
(J74-1352-22)
1
1
43
1
1
I
G
O
3
54
2
24 3
30
90
91
120
60
31
61
IC7
IC5
IC10
IC9
IC8
1
4
8
5IC11
1
4
8
5
IC12
Q13
BE
Q9
BE
Q10
BE
Refer to the schematic diagram for
the values of resistors and capacitors.
PC BOARD (COMPONENT SIDEVIEW)

19
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
JIHGF
1
2
3
4
5
6
7
X37-1020-0x
IC Q Address
14G
24F
46G
64I
14G
24F
34F
44G
55G
65I
15 5H
1
16
48
1
1
4
1
4
1
30
25
5026
144
132
133
1
50
176
88
11
1
45
89
33
17 32
64 49
13
54
IC1
IC6
IC4
IC2
R106
R105 R104
R103
C23
C24
C75
C76 R126
R124
C6
C7
C12 C10
R120
R119
C9
R44
C70
C84
C82
R112
R113
R42
C125
R131
R41
C65
C64
C126
C62
C137
L28
CP14
C58
C59
C127
C56
C128
CP1
CP5 CP8 CP9
C54
R36 C53 C52 C50
R28
R27
C48
C46
C41
C38
C39
C40
C45
C36
R30
C77
R130 R14
C113
C112 C111
C110
C27
R19
C25
R7R8
C2
C5 R121
C135
C136 R122
C22
C21
C20
R13
C18
C15
C11
C106
R127
C73
C87
C88
C83
C81
C80
C79
C71
C119
C72
C68
R43C67
C69
R114
R39R40
R38
C63
R37
R31
C42
R33
C49
R92
R95
C55
R89
R88
R94
R29
C123
C43
R129 C26
R16
R128
D1
D2
D3
D4
D5
Q3
CN4
G
D
S
Q6
CN3
D6
BE
Q15
CN1
CN2
CN5
BE
Q1
BE
Q5
BE
Q4
Q2
B
B
E
E
R9
R10
R11
R18
R12
C35
C34
C107
C19
C17
R6 R46
R117
R47
R62
R59
R63
R68
R66
R67
R57
L21
L16
C57
L17
L13
CP4 CP6 CP7
C51
L11
L10
C78
C108
R111
L7 R45
R15
R123
R17
R4
R3
TH1
R5
C138
C74
R54
C47
C37
C33 C32
L2
R55
X1
R65 R64 R61
R60 R58
R56
C44
L6
L18
L12 L8
R32
L5
L4
W2
W1
W3
C1
C13
R53
C89
C114
R48
C115
C4
C3
C8
DVDLD
CDLD
DVD MD
CD MD
AGND
CD F
CD E
DVD C
DVD A
B CD
DVD D
T+ B+ B-
SW-F
A-
A+ SWB
SWAD
SWC
GND
F-
F+
T-
DVD B
VREF
A CD
RF
BD0
SLD2
U
DRV1.65
W
SPD
SLD1H+
TRD
FOD
SW-E
H-
W+
V+
U+
V
U-
V-
W-
MD2
FBAL
JLINE
FG
A3.3
VREF
PLFLT1
NARF
ARF
JOUT
FE
TE
VHALF
AS
RFENV
VHALF
TBAL
M0
FWE
M3
M1
RXD1
TXD1
PGND
7V
5V
DGND
D3.3 RES M2
1.8V
OFTR
IOP+
IOP-
DVD UNIT
X37-1020-0x
(J74-1352-22)
Refer to the schematic diagram for
the values of resistors and capacitors.
PC BOARD (FOIL SIDE VIEW)

20
X92-4400-0x/4730-0x
X92-4740-0x/4750-0x
ABCDE
1
2
3
4
5
6
7
47K
10K
47K
10K
47K
10K
47K
10K
2.2V
2.2V
2.2V
2.2V
4.9V
2.2V
2.2V
2.2V
2.2V
0V
2.2V
2.2V
1.65V
2.1V
5.0V
0V
3.3V
0V
0V
1.2V
1.65V 3.3V
1.65V
0V
5.0-(2.2xIop)V
0V
5.0V
2.8V
5.0-(2.2xIop)V
2.05V
1.55V
1.5V
2.0V
1.65V
4.8V
0V
2.2V
1.65V
1.65V
2.2V
1.45V
1.7V
2.5V
0V
0V
0V
2.2V
2.2V
2.2V
0V
3.3V
1.9V
2.02V
2.48V 2.25V
0V
7.2V
1.65V
0 - 3.3V
0V
0V
0V
6.5V
-0.8V
1.65V
7.2V
0 - 3.3V
7.2V
0V
7.5V
0V
0V
3.3V 7.2V
4.2V
3.3V
0V
3.3V
0.85V 0V
1.35V
0.6V
2.9V 0.1V
0V
2.2V
3.3V
0V
3.3V
3.3V
3.3V
7.2V
1.75V
1.65V
1.85V
1.65V
3.3V
0V
3.25V
3.3V
0V
3.3V
1.65V
0V 1.5V
0V 0V
0V1.65V
3.3V
IC11
IC6
IC2
IC12
IC1
DVD UNIT (X37-1020-0x)
PICKUP
LASER
VPU1
(W02-3408-05)
MODULE
ELECTRIC CIRCUIT
Q4
Q5
Q13
Q6
Q2
Q3
Q15
CN2
CN3
CN5
CN1
D1
∗
D2
D4
D3 D5
D6
∗
Q1
APC
CD
IOP DETECTOR
DVD LD
DRIVE
DVD
APC
RF SIGNAL
PROCESSOR
AVR
FG SIGNAL
INVERTER
5V ACTUATOR/
MOTOR DRIVER
BACKUP
SW
CONTROL
S
C
MEMORY
EEPROM/BACKUP
M
FEED
MOTOR
VM2
LOADING MOTOR
VM3
M
VM1
SPINDLE
MOTOR
M
S2 (B)
S3 (C)
S1 (A)
S4 (D)
DISC LOAD SW
TP24
TP25
TP26
TP27
TP30
TP29 TP28
TP1
TP2
TP3
TP31
TP38
TP32
TP33
TP34
TP35
TP36
TP37
TP41
TP65
TP66
TP67
TP68
TP69
TP71
T
P
TP73
TP64
TP74
TP75
TP76
TP77
TP78
TP79
TP80
TP81
TP84
TP85
TP70
TP91
TP92
TP93
TP94TP95
TP96
TP97
TP98 TP99
B
CD A
CD B
RF
D
A
C
CD E
CD F
IOP-
IOP+
AGND
A
3
VHALF
DRV1.65
B+
B-
A-
A+
UV
W
H-
H+
SLD2 SLD1
SPD
CD LD
DVD LD
GND
DVD MDCD MD
PGND
VREF1
VREF2
4 3 2 1
SDA
SCL
WP
VCC
5 6
7
8
GND NC6 NC7 NC8
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
VCCS
MUTL
INLD
VROUT
RFSD1
MUTS
ISD2
ISD1
VGND
OSD1+
OSD1-
OSD2+
OSD2-
RFSD2
UOUT
VOUT
WOUT
RFSPL
SS
VSSPL
FIL1
FIL2
FG
HB
48
47
46
45
44
43
42
41
40
39
38
37
35
34
33
32
31
30
29
28
27
26
VRIN
INSPL
VIN2+
VIN2-
VIN2
VIN1+
VIN1-
VIN1
VSBL
VO2-
VO2+
VO1-
VLD-
VLD+
BGND
W-
W+
V-
V+
U-
U+
OSC
SGND
5
4
VDD
OUT
1
2
3
IN+
VSS
IN-
1
2
3
4
I/O1 O/I1 CONT2 GND
8 7 6 5
VCC
CONT1
O/I2 I/O2
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1
2
3
4
5 6
7
8 9
10
11
12
13
14
15 16
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
RFIN RFIN
TESTSG
AGCO
AGCG
PEAK
BTM
RFENV
BDO
OFTR
DCRF
RFC
VCC3
RFOUT
RFDFO
GND3
DCFLT
DFLTOP
DFLTOM
VHALF
VCC2
VREF2
GND2
AGLVL
MON
AGFST
FEOUT
FEN
ASOUT
AGBAL
TEOUT
TEN
LPC1 LPCO1 LPC2 LPCO2 VFSHT TBAL FBAL POFLT DTRD IDGT STNBY SEN SCK STDI RSCL JLINE
VIN5(B)
VIN6(A)
VIN7
VIN8
VIN9
VIN10
VCC1
VREF1
VIN1(B)
VIN2(A)
VIN3(D)
VIN4(C)
GND1
VIN11(F)
VIN12(E)
HDTYP
4
3
2
1
B+
B-
A-
A+
11
10
9
8
7
6
5
4
3
2
1
V
W
U
H-
HU-
HU+
HV-
HV+
HW-
HW+
H+
1
2
3
4
SW B
SW C
SW AD
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
ACT T-
ACT F+
ACT F-
ACT T+
DVD VCC
DVD VC
DVD PD GND
DVD D
DVD A
DVD RF
DVD B
DVD C
DVD LD
DVD LD GND
DVD HFM
DVD MD
DVD VR
CD VR
CD MD
CD LD
CD GND
CD VC
CD VCC
CD A
CD B
NC
NC
NC
CD E
CD F
0.1
C22
C3 10
C5 0.1
10
C1
R103 22
R104 22
R105 22
R106 22
C21 0.047
C20 0.033
C19 470P
R14 1.2M
C18 0.1
R130 750
C17 470P
R13 1.2M
C107 1
C15 0.01
22u6.3
C14
3300P
C11
0.1
C9
0.1
C12
L3
L2
R7 27K R8 27K
C6 220P
47u6.3
C31
L1
R3 10K R4 10K
L4
0.022
C117
L7
47K
R30
10K
R29
4.7K
R28
W2
W1 4.7K
R27
68
0
C
3
68
0
C
3
0.1
C27
2.2
R17
6.8
R16
∗
C25 10
∗
R128 4.7K
C26 10
0.01
C81
0.01
C80
0.01
C79
CP3
4.7K
0.1
C77
C74 10
C75 0.01
C76 0.01
C138 10
7.5K
R46
0.1
C73
W3
R66 15K
3.3K
R109 0.22 C116
18K
R65
82u10
C85
47P
C110
47P
C111
47P
C112
47P
C113
5P
C135
10K
R121
10K
R122
5P
C136
C4 10
C2 0.1
37
41
40
39
8.2
∗
R123
4.7
R5
10
R6
R9 22K
3.9K
R10
106
107
108 105
0.1
C7
18K
R11
10K
R124
66 65
∗
C24 0.1
100K
R126
Q2
20
∗
R15
100K
∗
R127
0.1
C23
97
10
R19
R18 220
91
82
52
51
0.1
C106
C10 0.1
119
118
117
120
R12 4.7
C8 10
84
10
C13
2.2
C114
1
R487.5K
R117
10K
R47
57
62
63
64
102
101
VO1+
14
25
36
50
49
2.2
C115
1
R53
1/2W
R54 0.47
65
R55 82
82
R56
390
R57
66
29
28
31
30
33
32
30K
R64
10K
R58
10K
R59
220P
C83
100P
C84
R62 15K
10
C89
R61 15K
51K
R68 115
114
47
68
FOD
TP42
TRD
TP43
C87 0.01
0.01
C88
4.7K
R60
15K
R63
15K
R67
330P
C78
28
29
30
31
32
33
41
40
39
37
C82 0.1
88
89
90
87
C104 0.1
33
0
C
3
22
0
C
3
120
119
118
117
47K
R110
IC
114
47
26
27
25
115
112
99
100
68
4.7K
R129
36
35
36
35
TP39
TP40
4
3
2
1
LOAD+
LOAD-
+
+
+
X37-1020-0x (1/3)