Sony WALKMAN WM-GX680, Service Manual

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6-8. IC PIN FUNCTION DESCRIPTION
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IC3 TC9327AF-612 (EXCEPT Tourist MODEL), TC9327AF-611(Tourist MODEL)
Pin No.
1 to 4
5 to 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
O
O
O
I
I
I
I
I
I
O
I
O
I
I
I
I
I
O
I/O
O
O
O
Description
Common terminal.
Segment output terminal.
Dolby control terminal. (L: ON, Hi-imp: OFF)
Motor speed control terminal.
Rec input select terminal.(L: normal, Hi-imp: MIC)
HEAD select terminal (PLAY mode) (L: REV, Hi-imp: FWD)
PRE AMP control terminal.
MUTE control terminal (L: MUTE ON).
HEAD select terminal (PLAY mode) (L: FWD, H: REW).
BAND control output (L: FM, H: AM).
Remote control data output.
TAPE error erase detect terminal. (FWD).
TAPE error erase detect terminal. (REV).
Remote control data input.
Input when the key is pressed during HOLD (H= AD Vref).
Tape end Locking detect input terminal.
Tape sound existing or not-exiting detect (L: Music exists: H: Music does not exist).
Terminal for controlling the rotation detect circuit.
Rotation detect input.
DDC control terminal (H: DDC ON).
HOLD detect input (L: HOLD ON).
Voltage detect input.
KEY input terminal.
TAPE rotating direction detect terminal.
AD IN 1, 2, 3 reference viltage interrupt terminal.
E
2
PROM CS control terminal.
E
2
PROM DATA I/O.
E
2
PROM CLOCK terminal.
BEEP (when TC: 1.6kHz, when CF: 3.0kHz).
MOTOR control terminal.
Pin Name
COM 1 to
COM 4
S1 to S18
DOLBY VCC
CTL
S1/2 CTL
RADIO/MIC
F/R CTL (REC)
PRE CTL
MUTE CTL
F/R CTL (PLAY)
BAND AM/FM
R DATA OUT
F TUME
R TUME
R DATA IN
HOLD SENS
OSC CTL
AMS IN
PHOTO CTL
PHOTO IN
DDC1 CTL
HOLD SW
BATT DET
KEY IN
F/R SW
(VCC) AD REF
CS
M DATA I/O
M CLOCK
BEEP
MOTOR CTL
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
I/O
O
I
O
O
O
O
O
O
O
O
O
O
I
I
O
O
I
O
—
I
I
—
I
O
I
—
—
—
—
—
Description
MOTOR control terminal.
TAPE detect terminal. (L: ON, H: OFF)
REC circuit control output.
Terminal for controlling AVLS (when ON=H).
Tone control terminal (L: normal, Hi-imp: MEGA BASS).
Revive control terminal.
Tone control terminal (L: GRV, H: MB).
AMP control output (H: AMP ON).
Terminal for controlling DOLBY circuit (L: OFF, Hi-imp: ON).
PL control terminal.
DDC control terminal (L: OFF, Hi-imp: ON).
RADIO system control terminal (L: RADIO ON).
TEST terminal (Normal operation at L or NC).
IF input.
TUNER sensitivity select terminal (H: LOCAL, L: DX).
Phase comparator output.
External interrupt terminal (Interrupt by key input).
FM MONO/STEREO select terminal (H: MONO, L: ST).
Power supply Ground terminal.
FM local oscillator input.
AM local oscillator input.
Power supply voltage.
RESET terminal (H during operation).
Terminal to which external oscillator is connected.
Terminal to which external capacitor is connected to stabilize crystal oscillator power supply.
Terminal to step-up power supply voltage for LCD drive. (3V)
Terminal to step-up power supply voltage for LCD drive.
Terminal for 1.5V constant voltage power supply of LCD drive.
Pin Name
MOTOR DIR
TAPE
REC CTL
AVLS CTL
BST CTL
RV CTL
MB/GRV CTL
AMP CTL
DOLBY CTL
PM CTL
DDC2 CTL
RADIO CTL
TEST
IF IN
LOCAL/DX
DO
WAKE UP
MONO/ST
GND
FM IN
AM IN
VDD
RESET
XOUT
XIN
VXT
VLCD
C1
C2
VEE