Read Sony CMT-DX2D / HCD-DX2D Service Manual online
48
HCD-DX2D
IC651 uPD16315GB-3BS
– KEY Board –
1
2
3
4
5
4-bit latch
24-bit output latch
12-bit shift register
Data selector
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
31
32
33
34
35
36
37
38
Serial
interface
OSC
Timing generator
key scan
Display memory
24 bits x 12 words
Key data memory
(2 x 16 bits)
Command decoder
segment driver
Grid driver
Multiplexed driver
39
40
41
42
43
44
LED1
LED2
LED3
LED4
OSC
DOUT
DIN
CLK
STB
KEY1
KEY2
VSS
VDD
SEG1/KS1
SEG2/KS2
SEG3/KS3
SEG4/KS4
SEG5/KS5
SEG6/KS6
SEG7/KS7
SEG8/KS8
SEG9/KS9
SEG10/KS10
SEG20/GRID9
SEG21/GRID8
SEG22/GRID7
SEG23/GRID6
SEG24/GRID5
GRID4
GRID3
GRID2
GRID1
VDD
VSS
SEG11/KS11
SEG12/KS12
SEG13/KS13
SEG14/KS14
SEG15/KS15
SEG16/KS16
VEE
SEG17/GRID12
SEG18/GRID11
SEG19/GRID10
– AMP Board –
SUB
Bias Circuit
Pre Driver
CH1
Pre Driver
CH2
3
2
1
4
6
5
8
7
13
10
11 12
9
14 15
CH2_IN
CH2_NF
ST_BY
CH1_NF
CH1_IN
GND
SUB
+PRE
CH2_OUT2
CH2_OUT1
CH1_OUT2
CH1_OUT1
+VCC
-VCC
-PRE
IC103 STK433-070
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