Block Diagram; Components Description - Kenwood X92-4470-00 Service Manual

X92-4470-0x
Pick-Up
A B
E F
C D
Tr Coil
Fo Coil
Spindle Motor
Loading & Sled
Motor
CD PLAYER UNIT (X32-5220-0x)
Ref.No. Application/Function
IC2 D3.3V AVR
IC3 D2.5V AVR
IC4 4CH BTL driver
IC5 Mecha. control MI-COM.
IC6 A3.3V AVR
IC7 Level shifting (3.3V→5V)
IC8 WMA decoder
IC9 Clock buffer for WMA
IC10 RF amplifier+CD DSP+MP3 decoder
IC11 4M bit DRAM
IC12 Low pass filter
IC13 Schmitt trigger for WMA
Q1 SW5V SW
Q2 APC
Q3 D3.3V SW
Q4
A.8V SW
Q5
2

BLOCK DIAGRAM

IC10
7
1Chip IC
Q2
Servo Processor
+
APC
RF Amp
+
MP3 Decorder
Vref
D.GND
X2 X3
Clock Clock
16.93MHz 24.57MHz
IC4 16.93MHz
IC8
Motor Driver
WMA Decorder
S.GND

COMPONENTS DESCRIPTION

Power supply for the pickup, IC5, IC8-10 and IC11
Power supply for IC8
Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
Power supply for DAC, LPF operational reference voltage
Buffer and logic level conversion from IC10 to IC5
For data buffer
2nd low pass filter for audio signals
When PON (11pin) goes Lo, Q1 is turned on, and SW5V is supplied to IC7 and
AVREF (73PIN).
LD power control
When PON (10pin) goes Hi, Q3 is turned on, and IC2 is working.
When PON (10pin) goes Hi, Q4 and Q5 are turned on, and A.8V is supplied to IC6
and IC12.
IC12
LPF
A.GND
IC11
30
DRAM
D.GND
IC5
9
/PON
µ-Com
PON
D.GND
16
9 IC3
2.5V Reg
D.GND
D.GND
Operation/Condition/Compatibility
Mother Board
IC6
A3.3 Reg
A.GND
Q4
8V SW
Q5
SW
Q1 D.GND
SW
SW5V
Q3 IC2
SW D3.3VReg
S3
S4
0-01 Only
S2
S1
R-ch
L-ch
A.GND
A.+8V
D.GND
Bu.+5V
D4.7V
Loe/Lim SW
8Eje SW
12Eje SW
Los SW
S7.5V
S.GND
Lo/Ej
Motor