Read Sony TC-S90D Service Manual online
20
TC-S90D
• MAIN BOARD IC311 PT8300-S (LED DRIVE, MOTOR DRIVER)
Pin No.
Pin Name
I/O
Description
1
VSS
—
Ground terminal
2
RESET_B
I
Reset signal input terminal Nor used
3
CLK
I
Serial data transfer clock signal input from the PT8300-S (IC310)
4
LATCH
I
Serial data latch pulse input from the PT8300-S (IC310)
5
P15
O
Not used (connected to pin 6)
6
P14
O
LED drive signal output of the B-FWD indicator (D302) “L”: LED on
7
P13
O
Not used (connected to pin 8)
8
P12
O
LED drive signal output of the B-REV indicator (D303) “L”: LED on
9
P11
O
Not used (connected to pin q;)
10
P10
O
LED drive signal output of the A-REV indicator (D301) “L”: LED on
11
P9
O
Not used (connected to pin qs)
12
P8
O
LED drive signal output of the A-FWD indicator (D300) “L”: LED on
13
LATCHO
O
Not used (open)
14
CLKO
O
Not used (open)
15
DO1
O
Not used (open)
16
DI2
I
Not used (fixed at “L”)
17 to 21
P7 to P3
O
Not used (open)
22
P2
O
Not used (connected to pin wd)
23
P1
O
Capstan motor on/off control signal output terminal “H”: motor on
24
P0
O
High/normal speed selection signal output of the capstan motor
“H”: normal speed, “L”: high speed
“H”: normal speed, “L”: high speed
25
DO2
O
Serial data output to the PT8300-S (IC310)
26
DI1
I
Serial data input from the PT8300-S (IC310)
27
PULLUP
I
P8 to P15 Control pin for Pull-up resistor (fixed at “L”)
28
VCC
—
Power supply terminal (+5V)
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