Diagrams; Explanation Of Ic Terminals - Sony SRF-T615 Service Manual

4-1. EXPLANATION OF IC TERMINALS

IC502 µPD17073GB-925-9EU (SYSTEM CONTROL, LCD DRIVE)
Pin No. Pin name
1 DO
2 EEPROM CS
3 TV 4-12CH
4 MUTE
5 NC
6 POWER
7 KS0
8 KS1
9 KS2
10 KS3
11 KR0
12 NC
13 KR1
14 KR2
15 KR3
16 METER
17 ST/MONO
18 V DET2
19 BAND
20 GND
21 GND
22 EO
23 VCOL
24 VCOH
25 REG0
26 VDD
27 VDD
28 X OUT
29 X IN
30 REG1
31 LEG LCD0
32 CAP LCD0
33 CAP2 LCD1
34 LEG LCD1
35 COM0
36 COM1
37 COM2
38 NC
39 COM3
40 LCD0
41 LCD1
42 LCD2
43 LCD3
44 LCD4
45 NC
SECTION 4

DIAGRAMS

I/O
— Not used (OPEN).
— Not used (OPEN).
— Not used (OPEN).
O Audio mute signal output.
— Not used (Connect to ground).
O Power ON/OFF control output.
O Key source signal output. *1
O Key source signal output. *1
O Key source signal output. *1
O Key source signal output. *1
I Key return signal input.
— Not used (Connect to ground).
I Key return signal input. *1
I Key return signal input. *1
I Key return signal input. *1
O Meter drive signal output (Not used : OPEN).
O Stereo/ Mono control signal output.
I Voltage decrease detection input.
O Band select output. "H" : AM, "L" : FM
— Ground terminal.
— Ground terminal.
O PLL error signal output for PLL LPF.
I VCO input.
— Not used (OPEN).
— Capacitor connection terminal for LCD drive voltage.
— Power supply terminal (3V).
— Power supply terminal (3V).
O System clock output (75kHz).
I System clock input (75kHz).
— Capacitor connection terminal for LCD drive voltage.
— Capacitor connection terminal for LCD drive voltage.
— Capacitor connection terminal for LCD drive voltage.
— Capacitor connection terminal for LCD drive voltage.
— Capacitor connection terminal for LCD drive voltage.
O Common signal output for LCD.
O Common signal output for LCD.
O Common signal output for LCD.
— Not used (Connect to ground).
O Common signal output for LCD.
O Segment signal output for LCD.
O Segment signal output for LCD.
O Segment signal output for LCD.
O Segment signal output for LCD.
O Segment signal output for LCD.
— Not used (Connect to ground).
– 7 –
Description
"L" : less than 2.1V (Change to clock mode).