Diagrams; Explanation Of Ic Terminals - Sony ICF-C1200 Service Manual

ICF-C1200

4-1. EXPLANATION OF IC TERMINALS

• IC301 TC9328AF-SR7491
(System control, LCD driver)
Pin No. Pin name
1-4 COM1-4
5-26 S1-S22
27 HOLD SW
28-30 KR1-3
31 VDD
32-34 KR1-3
35 POWER
36 BEEP
37 MUTE
38 WAKE UP
39 LCD
40 BAND
41 TEST
42 HOLD
43 INTR1
44 INTR2
45
46
47 GND
48 FM IN
49 AM IN
50 VDD
51 D01
52 D02
53 VREG
54
55 AL SW1
56 AL SW2
57 AL SW3
58 VDET
59 ID
60 ID
61
62 SP BEEP
63 LIGHT
64 ST/MO
65-69
70 RESET
71 XOUT
72 XIN
73 GND
74 VDB
75 C1
76 C2
77 VEE
78 C3
79 C4
80 VLCD
6
SECTION 4

DIAGRAMS

I/O
O LCD common output.
O LCD segment output.
I HOLD switch input. ON:L OFF:H
I Key return input.
— Power supply terminal.
O Key souce output.
O Power ON control signal output. ON:L OFF:H
O Beep signal output.
O Mute signal output.
O Alarm output at volume control min. ON:L OFF:H
I LCD check test mode setting input.
O Band select signal output. AM:H
— Not used (Fixed at "L").
— Not used (Fixed at "L").
I 1.9V voltage detection terminal. Radio OFF :L
I 1.1V voltage detection terminal. All OFF :L
— Not used (OPEN).
— Not used (OPEN).
— Ground terminal.
I FM local oscillator signal input.
I AM local oscillator signal input.
— Power supply terminal.
— Not used (OPEN).
O Tuning voltage control output.
— Regulator output for phase compalator.
— Not used (OPEN).
I ALARM switch input (OFF).
I ALARM switch input (RADIO).
I ALARM switch input (BUZZER).
I 2.1V voltage detection input.
I Destination select input.
I Destination select input.
— Not used (OPEN).
O Beep signal output.
O LCD back light ON/OFF output.
O Stereo/Mono select output.
— Not used (OPEN).
I Reset signal input.
O Oscillator output (75kHz).
I Oscillator input (75kHz).
— Ground terminal.
— Capacitor terminal.
— Capacitor terminal.
— Capacitor terminal.
— Voltage pull-up terminal.
— Capacitor terminal.
— Capacitor terminal.
— Voltage pull-up terminal.
Description
FM:L