Sony TC-S9 Service Manual page 20

TC-S9
• MAIN BOARD IC311 PT8300-S (LED DRIVE, MOTOR DRIVER)
Pin No. Pin Name
1 VSS
2 RESET_B
3 CLK
4 LATCH
5 P15
6 P14
7 P13
8 P12
9 P11
10 P10
11 P9
12 P8
13 LATCHO
14 CLKO
15 DO1
16 DI2
17 to 21 P7 to P3
22 P2
23 P1
24 P0
25 DO2
26 DI1
27 PULLUP
28 VCC
20
I/O
—
Ground terminal
I Reset signal input terminal
I
Serial data transfer clock signal input from the PT8300-S (IC310)
I
Serial data latch pulse input from the PT8300-S (IC310)
O
Not used (connected to pin 6)
O LED drive signal output of the B-FWD indicator (D302)
O
Not used (connected to pin 8)
O
LED drive signal output of the B-REV indicator (D303)
O
Not used (connected to pin q;)
O LED drive signal output of the A-REV indicator (D301)
O
Not used (connected to pin qs)
O
LED drive signal output of the A-FWD indicator (D300)
O
Not used (open)
O Not used (open)
O
Not used (open)
I
Not used (fixed at "L")
O
Not used (open)
O Not used (connected to pin wd)
O
Capstan motor on/off control signal output terminal
High/normal speed selection signal output of the capstan motor
O
"H": normal speed, "L": high speed
O
Serial data output to the PT8300-S (IC310)
I
Serial data input from the PT8300-S (IC310)
I
P8 to P15 Control pin for Pull-up resistor (fixed at "L")
—
Power supply terminal (+5V)
Description
Nor used
"L": LED on
"L": LED on
"H": motor on
"L": LED on
"L": LED on