Main Board - Sony HCD-CP2A Service Manual

– MAIN Board –
IC301 TDA7439
30 29 28 27 26 25 24 23 22 21 20 19
IIC BUS
DECODER &
LATCH
VREF
SUPPLY
1 2 3 4
IC800 µPD7225GB-3B7
56 55 54 53 52 51 50
S20 1
S21 2
S22 3
LCD DRIVER
S23 4
S24 5
S25 6
DISPLAY DATA LATCH
S26 7
S27 8
S28 9
S29 10
S30 11
SEGMENT
S31 12
DECODER MEMORY
CL1 13
COMMAND/DATA REGISTER
OSC
LCD TIMING SERIAL
CONTROL INTERFACE
IC 14
15 16 17 18 19 20 21 22
18 17
VOLUME
TREBLE
MIDDLE
BASS
SPEAKER
ATTENUATOR
GAIN AMP
MULTIPLEXER
5 6 7 8 9 10
49 48 47 46 45 44 43
BLINKING
DATA DATA
DATA
POINTER
MEMORY
COMMAND
DECODER
WRITE
CONTROL
23 24 25 26 27 28
16
VOLUME
TREBLE
MIDDLE
BASS
SPEAKER
ATTENUATOR
GAIN AMP
MULTIPLEXER
11 12 13 14 15
42 IC
41 S7
40 S6
39 S5
38 S4
37 S3
36 S2
35 S1
34 S0
33 COM3
32 COM2
31 COM1
30 COM0
29 NC
IC309 KA3082
DRIVER OUT
PRE DRIVER
LOGIC
TSD
SWITCH
1 2 3 4 5 6 7 8 9 10
33