Chapter 4 ELECTRICAL SIGNALS
UNI-5 Service Manual
4-1
ELECTRICAL SIGNALS
4.1
MAIN BOARD (PK-270)
Before replacing the main board PK-270, make sure to turn ON the battery switch and every switch 1
is turned OFF.
XJ16
No.
Signal Name
Direction
Opposite Side
1,2,5,7,9,11,14,
16,18,25,26,40
GND
-
PK-261(XJ3)
3,4
DC+5V power supply for LCD
→
6,8,10,12,13,
15,17,19,20
LCD control signal
→
21,22
AC power supply for LCD
-
23
DC-10V power supply for LCD
-
24
DC+15V power supply for LCD
-
27
DC+15V power supply for LCD backlight
-
28,29
Light control signal for LCD backlight
←
30
External buzzer signal
→
31 NC
→
32,33 DC+5V
-
34 - 39
Membrane key control signal
←→
XJ20
No.
Signal Name
Direction
Opposite Side
1 - 14
Debug signal
←→
Unused
4
Summary of Contents for Uni-5
Page 11: ...Chapter 1 BASIC INFORMATION 1 2 UNI 5 Service Manual 1 1 2 OUTER DIMENSIONS FOR POLE TYPE ...
Page 12: ...Chapter 1 BASIC INFORMATION UNI 5 Service Manual 1 3 1 1 4 OUTER DIMENSIONS FOR ELEVATED TYPE ...
Page 16: ...Chapter 2 ASSEMBLY DRAWINGS UNI 5 Service Manual 2 1 ASSEMBLY DRAWINGS 2 1 BENCH TYPE 2 ...
Page 18: ...Chapter 2 ASSEMBLY DRAWINGS UNI 5 Service Manual 2 3 2 2 POLE TYPE ...
Page 22: ...Chapter 2 ASSEMBLY DRAWINGS UNI 5 Service Manual 2 7 2 5 PRINTER FOR EACH TYPE ...
