Read Sony CMT-SP55TC / TC-SP55 Service Manual online
19
1
VCC
—
Power supply.(+5V)
2
VREF
—
Analog Reference Voltage.
3
AVSS
—
Ground.
4
NC
—
Not used.
5
NC
—
Not used.
6
P.DOWN
I
POWER DOWN signal control signal input. H: Normal L: STANDBY mode
7
DOLBY
O
DOLBY B NR control signal output. H: ON L: OFF
8
AMS IN
I
AMS search signal input.
9
NC
—
Not used.
10
NC
—
Not used.
11
NC
—
Not used.
12
NC
—
Not used.
13
I2C-CLK
I/O
IIC bus clock input/output.
14
I2C-DATA
I/O
IIC bus data input/output.
15
CNVSS
—
Connected to ground.
16
BIAS
O
REC bias control signal output. H: ON L: OFF
17
+MTR
O
Capstan Motor control. H: ON L: OFF
18
RESET
I
Reset signal input. L: RESET
19
XIN
I
Ceramic oscillator input.(8MHz)
20
XOUT
O
Ceramic oscillator output.(8MHz)
21
VSS
—
Ground.
22
SYNC REC LED
O
CD SYNC LED control signal output. H: OFF L: ON
23
REC LED
O
REC LED control signal output. H: OFF L: ON
24
PAUSE LED
O
PAUSE LED control signal output. H: OFF L: ON
25
FWD LED
O
FWD LED control signal output. H: OFF L: ON
26
REV LED
O
REV LED control signal output. H: OFF L: ON
27
TC-RELAY
O
Head REC/PB select signal output. H: REC L: PB
28
PLAY SW
I
MC PLAY switch signal input.
29
+SOL
O
MC mode exchange solenoid control signal output.
30
REC/PB/PASS
I/O
REC/PB/PASS select . H: REC PASS L: REC mode 1/2Vcc: PB MODE
31
REC MUTE
O
REC MUTE control. H: ON L: OFF
32
TC-MUTE
O
TC LINE MUTE control signal output. H: ON L: OFF
33
ALC
O
Automatic level control signal output. H: OFF L: ON
34
LOAD IN SW
I
Detection input from the tray open/close switch. H: LOAD IN
35
LOAD OUT SW
I
Detection input from the tray open/close switch. L: LOAD OUT
36
LOAD IN
O
Tray loading motor LOAD IN signal output. H: ON L: OFF
37
LOAD OUT
O
Tray loading motor LOAD OUT signal output. H: ON L:OFF
38
PACK
I
Detection input from the cassette half switch. H: HALF OFF L: HALF ON (H:without a half L: within a half)
39
B-HALF
I
REC proof detect signal input.
40
SENSOR OUT
I
Reel senser signal input.
41
KEY1
I
Key input.
42
KEY0
I
Key input.
Function
Pin Name
Pin No.
I/O
• IC701 M38513M4-C59FP SYSTEM CONTROL (MAIN BOARD)
7-6. IC PIN FUNCTIONS
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