Sony HCD-GRX2 / HCD-RX33 / MHC-GRX2 / MHC-RX33 Service Manual ▷ View online
5-10.
IC PIN FUNCTION
Pin No.
1
2
3
4
5
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
39
40
41
42
43
44
45
46
47
48
49
50
I/O
—
O
O
O
O
O
O
O
O
—
I
I
—
—
I
—
O
O
I
O
O
O
O
I
—
O
O
—
I
I
I
I
I
O
—
O
O
I
I
—
O
I
O
I
I
—
I
I
I
I
Pin Name
VDD
POWER OUT
S. MUTE OUT
TU. MUTE OUT
TUNED OUT
TAPE REC OUT
DBFB NORMAL
NC
NC
RESET
X2
X1
VSS
NC
POWER DOWN IN
VDD
SOCK
DATA
SOSO
XLAT
CE
CLK
DO
DI
VSS
CD STB
FLAT
VSS
K4
K3
K2
K1
K0
AVDD
AVREF
A LATCH
B LATCH
SCOR
REMOTE IN
VSS
NC
VSS
DECK STB
VR UP
VR DOWN
VDD
FM ST IN
SYNC REC IN
VSS
VSS
— 52 —
IC601 µPD780205GF (SYSTEM CONTROL) / PANEL BOARD
Description
VDD
Power switch output. ON: H, OFF: L
System mute output. ON: H, OFF: L
Tuner mute output. ON: H, OFF: L
Surround output. ON: H, OFF: L (Not used)
Function tape output. Tape: H, Others: L (Not used)
DBFB normal (U2: DBFB). ON: H, Others: L
DBFB high. ON: H, Others: L (Not used)
Not used
Reset input
X’tal 4.194314 MHz
X’tal 4.194314 MHz
Ground
Not used (open)
Power down input. AC ON: H, AC OFF: L
VDD
CXD2508A SQCK, CLOCK output
CXD2508A data output
CXD2508A SQSO input
CXD2508A XLAT output. Latch: L, Others: H
Chip enable output to LC7218, LC75392. Data: H, Address: L
CLK output
Data output
Data input
Ground
STB output to SN74HC4094. STB: L, Others: H
Flat output. Flat: H, Others: L (Not used)
Ground
Key input 4 to A/D
Key input 3 to A/D
Key input 2 to A/D
Key input 1 to A/D
Key input 0 to A/D
VDD of A/D converter
Reference voltage of A/D converter
Latch output to BU2092. Latch: H, Others: L
Not used
CXD2508A SCOR
Remote signal input. ON: H, OFF: L
Ground
Shift or load output to SN74HC165. Shift: H, Load: L (Not used)
Data input to SN74HC165 (Ground)
STB output to BU2114, SN74HC4094. STB:H, Others: L (Not used)
VR encoder A input. ON:L, OFF: H
VR encoder B input. ON:L, OFF: H
VDD
FM stereo indicator input. Stereo:L, Mono: H
Synchro record input. Record:L, Other: H
CD encoder A input. ON: L, OFF: H (Ground)
CD encoder B input. ON: L, OFF: H (Ground)
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