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