Kenwood X-92446000 Service manual
©
2002-1 PRINTED IN JAPAN
B51-7891-00 (N) 3415
DESCRIPTION MECHANISM
X92-4460-00 (DXM-6400W)
X92-4460-01 (DXM-6401W)
X92-4460-02 (DXM-6402W)
X92-4460-03 (DXM-6403W)
outer-chassis
dumper (X4)
floating spring (X4)
traverse chassis assy
Mecha PCB
roller spring
roller lever assy
damper bracket
disc guide assy
CONSTRUCTION OF MAJOR PARTS
CD MECHANISM ASSY
X92-4460-0x
SERVICE MANUAL
2
NOTE FOR HANDLING MECHANISM ASSY
Trigger Lever
Pick is under the finger, it
may touch.
NG
Don’t touch the lever because the trigger lever
comes off.
NG
Don’t have the center of
entrance because the disc
insertion mouth is transformed.
NG
OK OK
PICK UP
SPINDLE MOTOR
SLIDER ASSY
ROLLER
OK OK NG
• Don’t touch in the frame, since grease is
applied to the parts.
• Don’t applied grease to the roller.
• Don’t touched PICK and SPINDLE MOTOR.
X92-4460-0x
3
EF
ACB
D
TR COIL
FO COIL
APC
1 CHIP IC
SERVO
MP3 DECODER
RF AMP
IC10
Q2
16.93MHz
CLOCK
X2
D. GND
DRIVER
MOTOR
IC4
PROCESSOR
SPINDLE
MOTOR
SLED MOTOR
LOADING &
S. GND
LPF
IC12
IC11
DRAM
D. GND
IC5
MI-COM
IC6
A3.3 REG
8V SW
Q4
Q5
SW
Q1
SW
Q3
SW
IC2
D3.3V REG
D. GND
A. GND
D. GND
S3
S4
S1
S2
D. GND
(0-01)
ONLY
A. GND
A. GND
PICK-UP BOARD
MOTHER
7
VREF
30
24
PON
PON
Lch
Rch
A. GND
A. +8V
D. GND
BU. +5V
D5V
LOE/LIM SW
8EJE SW
12EJE SW
LOS SW
S7.5V
LO/EJ
MOTOR
S. GND
2
2
4
2
2
D MUTE
BLOCK DIAGRAM
COMPONENTS DESCRIPTION
X92-4460-0x
●CD PLAYER UNIT(X32-5210-0x)
Ref.No.
Component Name Application/Function Operation/Condition/Compatibility
IC2 L88MS33T D3.3V AVR
Power supply for the pickup, IC5, IC10 and IC11
IC4 BA5824FP 4CH BTL driver
Focusing coil, tracking coil, spindle motor
and sled motor driver, disc loading and eject
operation.
IC5 703033AYGC-J01 Mecha. control MI-COM.
IC6 TAR5S33 A3.3V AVR
Power supply for DAC, LPF operational
reference voltage
IC7 TC74HCT7007AF Level shifting(3.3V→ 5V)
Buffer and logic level conversion from IC10 to IC5
IC10 UPD63760GJ RF amplifier+CD DSP+MP3 decoder
IC11 4M bit DRAM For data buffer
IC12 NJM4580M1 Low pass filter 2nd low pass filter for audio signals
Q1 DTA143EUA D.5V SW
When PON(11pin) goes Lo, Q1 is turned on,
and SW5V is supplied to IC7 and
AVREF(73PIN).
Q2 MCH6101 APC LD power control
Q3 DTC124EUA D3.3V SW
When PON(10pin) goes Hi, Q3 is turned on,
and IC2 is working.
Q4 DTA143XUA
A.8V SW
When PON(10pin) goes Hi, Q4 and Q5 are
turned on, and A.8V is supplied to IC6 and
IC12.
Q5 DTC124EUA
IS41LV16257
or MSM51V4265EP70
4
MICROCOMPUTER'S TERMINAL DESCRIPTION
●
IC2 (CD PLAYER UNIT : X32-5210-0x)
Pin No. Name
.
I/O Description Processing Operation
1-5 NC O Not used(N.C.)
6 EVDD - Positive power supply connection terminal Connected to BU 5V lines.
7 EVSS - Ground connection terminal Connected to GND lines.
8,9 NC O Not used(N.C.)
10 PON O Power ON/OFF control terminal Lo : Power OFF, Hi : Power ON
11 PON O Power ON/OFF control terminal Lo : Power ON, Hi : Power OFF
12 LOE/LIM SW I Down limit SW detection terminal
Hi→Lo : Pickup most inner position detected
13 8EJE SW I 8cm disc detection SW input Not used(connected to GND lines)
14 LOS SW I Loading start detection SW input Not used(connected to GND lines)
15 12EJE SW I 12cm disc detection SW input Not used(connected to GND lines)
16,17 NC O Not used(N.C.)
18 VPP - FLUSH write terminal Not used(connected to GND lines)
19 MUTE L O Lch. Audio muting control output
Lo : Muting ON requested,
Hi : Muting OFF requested
20 MUTE R O Rch. Audio muting control output
Lo : Muting ON requested,
Hi : Muting OFF requested
21-25 NC O Not used(N.C.)
26 EFLG I WMA error detection input (Lo: No ERROR) Not used(pull down to GND lines)
27 WAIT I Wait control signal detection input
28 FOK I Focusing condition detection input Lo : Focusing NG, Hi : Focusing OK
29,30 NC O Not used(N.C.)
31 RESET I Reset terminal Lo : Reset, Hi : Normal operation
32 XT1 I Sub clock resonator connection terminal Not used(pull down to GND lines)
33 XT2 - Sub clock resonator connection terminal Not used(N.C.)
34 REGC - Capacitor connection terminal for regulator inside microprocessor
35 X2 - Main clock resonator connection terminal
36 X1 I Main clock resonator connection terminal
37 VSS - Ground connection terminal Connected to GND lines.
38 VDD - Positive power supply connection terminal Connected to BU 5V lines.
39 NC O Not used(N.C.)
40 WRL O Multiplex WRITE signal output Lo : Write
41 NC O Not used(N.C.)
42 R/W O Multiplex R/W signal output Not used(N.C.)
43 DSTB,RD O Multiplex RD siganal output Lo : Read
44 ASTB O Multiplex ASTB siganal output
45,46 NC O Not used(N.C.)
47 AD0 I/O Multiplex Address/Data Bus
48 AD1 I/O Multiplex Address/Data Bus
49 AD2 I/O Multiplex Address/Data Bus
50 AD3 I/O Multiplex Address/Data Bus
51 AD4 I/O Multiplex Address/Data Bus
52 AD5 I/O Multiplex Address/Data Bus
53 AD6 I/O Multiplex Address/Data Bus
54 AD7 I/O Multiplex Address/Data Bus
55 BVDD -
Bus interface positive power supply connection terminal
Connected to D3.3V lines.
X92-4460-0x
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
X92-4460-0x
Pin No. Name
.
I/O Description Processing Operation
56 BVSS - Bus interface ground connection terminal Connected to GND lines.
57 AD8 I/O Multiplex Address/Data Bus
58 AD9 I/O Multiplex Address/Data Bus
59 AD10 I/O Multiplex Address/Data Bus
60 AD11 I/O Multiplex Address/Data Bus
61 AD12 I/O Multiplex Address/Data Bus
62 AD13 I/O Multiplex Address/Data Bus
63 AD14 I/O Multiplex Address/Data Bus
64 AD15 I/O Multiplex Address/Data Bus
65 HCSB O Chip select control output Not used(N.C.)
66 CS O Chip select control output Lo : ON, Hi : OFF
67 DSP RESET O DSP reset control output Lo : Reset, Hi : Normal operation
68 REQ I Data transfer request input Not used(pull down to GND lines)
69 DBBWRDY0 I DBB00 register write permission input Not used(pull down to GND lines)
70 DBBRRDY0 I DBB00 register read permission input Not used(pull down to GND lines)
71 AVDD -
A/D converter positive power supply connection terminal
Connected to BU 5V lines.
72 AVSS - A/D converter ground connection terminal Connected to GND lines.
73 AVREF I A/D converter reference voltage input terminal Connected to D5V lines.
74-77 NC I Not used(connected to GND lines)
78 HOT I Temperature change detection input Not used(pull down to GND lines)
79 M-CONT I Not used(connected to GND lines)
80 WMA I WMA adaptation selection input
Lo : WMA not adapted,
Hi : WMA adapted
81 NC I Not used(connected to GND lines)
82 ASEL I Audio output polarity selection input
Lo : Non-inverted output,
Hi : Inverted output
83 DASC I Shock proof method selection input
Lo : Shock proof OFF,
Hi : Shock proof ON
84 TEST2 I test terminal 2 Not used(pull down to GND lines)
85 TEST3 I test terminal 3 Not used(pull down to GND lines)
86 NC O Not used(N.C.)
87 MSTOP I MECHA. Stop interrupt input Lo : Stop, Hi : Normal operation
88 INTSV I Interrupt input from servo IC Hi : Interrupt
89 FOGUP I Focusing gain up interrupt input
Lo : Normal operation,
Hi : Focusing gain up
90 ZMUTE R I Rch. 0 bit muting detection input Lo : Muting OFF, Hi : Muting ON
91 ZMUTE L I Lch. 0 bit muting detection input Lo : Muting OFF, Hi : Muting ON
92 NC O Not used(N.C.)
93 D-MUTE O Driver muting output
Lo : Spindle motor, focusing
actuator and tracking actuator
outputs OFF
94 SYS SDA I/O
I2C bus data line (communication line with System microprocessor)
95 NC O Not used(N.C.)
96 SYS SCL I/O
I2C bus clock line (communication line with System microprocessor)
97-100 NC O Not used(N.C.)
6
Center
of rotation
Projection
Disc
8cm Disc
Trigger arm
A
Disc
Trigger arm
Position pushed by the disc
Switch ON!
Disc arm(L)
Disc arm(R)
Disc
Claw (A)
OPERATION DESCRIPTION
[1] Disc Loading
(1) Turning the loading switch ON
1) When a disc is inserted, the disc arms open to the left and
right and the claw below disc arm (L) sets the loading
switch ON.
2) The above starts the motor rotation.
(2) Loading the disc
1) When the motor starts rotation, the worm gear also starts
to turn as shown in the figure.
2) The rotation force is transmitted to the gear train.
3) When the force is transmitted to the final gear, the rollers
rotate to pull in the disc.
The disc is pulled in or out when the rollers are pushed
against the disc guide.
[2] Operation of Slider (R)
(1) Activating the trigger arm
1) When the disc is pulled in by the rollers, the disc edge
pushes the trigger arm and rotates it.
2) When the disc is an 8cm disc, it is pulled upwards by the
tapering on the disc guide. The trigger arm is rotated
when the disc pushes the claw (section A) located before
the trigger arm.
When the 8cm disc reaches the loading end position, the
roller areas supporting the disc decreases. To prevent the
disc from dropping in this case, the claw is provided with a
projection for supporting the disc.
Worm gear Motor
Rubber rollers
Disc IN
Side view
Disc guide
Roller
Disc IN
Disc OUT
Dis
Clamper chassis
X92-4460-0x
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