AIWA CRD90
Service Manual

LCD DISPLAY

Pin No.
50

Pin Name

I/o I

Description Terminals to which external crystal is to be connected.

I
I

XT XT INT VDD VLCD
cl C2 C3

51 52
53

w
I � System reset signal input< Power supply terminal.
MEM

I

A

54 55 56
57

�

to which external voltage doubler for LCD drive is to be connected.

� o 0

The terminal to which external capacitor for stabilizing the reference voltage of the LCD drive, is to be connected.

58

I
I

COM1
Sl, S2

Common signal output to LCD. Segment signal output to LCD. NO I COM1 I COM2 I 1 COM1 2 TV 3 AM FM 4 Ic lB 51 -12A] 10 1113 8 9 7 3F 3B E13GI 2-B P 3C 4A 4B 4G 4C MEM MHz I
ICOM21

59,60

* NOTE

Function Symbol AUTO DOWNIH uP/M Description of Symbol Searches for the receiving station and memorizes it. Moving down the frequency, or adjusts the �hour� digit of watch. Moving up the frequency, or adjusts the �minute� digit of watch. I I Used to write data into the pre-set memory. Used when reading and writing data to and from pre-set memory. This is the stop switch for alarm sound. It switches the mode is cyclically. NORMAL -� ALARM time setting + CLOCK time setting ~ ALARM BAND CHECK It sets ON or OFF of the alarm operation. It switches the BAND cyclically. AM � FM (TV) 7 It illuminates all segments of LCD. I

2E

2G 2C
3A

=l=H
12 13 14 30 5 4F 4E 4fI STE KHz HOLBI
-

I I

MEMORY Ml toM7 STOP MODE

I

15 16 17 = 18 191
20]

5

6