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5-6. IC PIN FUNCTION DESCRIPTION
IC701 TB2004FN-020-ER(SYSTEM CONTROL)/MAIN BOARD
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14 – 16
17
18
19
20
21
22
23
24
I/O
–
–
I
I
I
I
I
I
I
I
I
–
–
–
O
O
O
O
O
–
O
–
Description
Ground
For generation of system clock (fosc = 3.2 kHz)
Reset signal input
PAUSE ON/OFF by the PAUSE switch and V•O•R switch “L”: ON, “OPEN”: OFF
Recovery to FWD when opening/closing the cassette lid “L”: ON, “OPEN”: OFF
Direction “L”: ON, “OPEN”: OFF
REC/PB selection “L”: ON, “OPEN”: OFF
FF/REW “L”: ON, “OPEN”: OFF
POWER : ON/OFF “L”: ON, “OPEN”: OFF
Photo reflector pulse input for tape end detection
FWD/REV selection “L”: ON, “OPEN”: OFF
Not used
Not used
Not used
LED ON/OFF “L”: ON, “OPEN”: OFF
Audio mute “L”: ON, “OPEN”: OFF
Motor brake “L”: ON, “OPEN”: OFF
Motor direction “L”: FWD, “OPEN”: OFF
Motor ON/OFF “L”: ON, “OPEN”: OFF
Power supply for CMOS block
Voltage doubler circuit control output
Power supply for bipolar block
Pin Name
GND
OSC
CL
IN-1
IN-2
IN-3
IN-4
IN-5
IN-6
IN-7
IN-8
I/O-1
I/O-2
OUT-8 – 6
OUT-5
OUT-4
OUT-3
OUT-2
OUT-1
VDD
CONT
VCC
