Chapter 4 Electrical Signals; Main Board (Pk-260) - ISHIDA UNI-7 Service Manual

ELECTRICAL SIGNALS
4.1

MAIN BOARD (PK-260)

Before replacing the main board PK-260, make sure to turn ON the battery switch and every switch 1
is turned OFF.
XJ1
No.
1,2,5,7,9,11,14,
GND
16,18,25,26,40
3,4 DC+5V power supply for LCD
6,8,10,12,13,
LCD control signal
15,17,19,20
21,22 AC power supply for LCD
23 DC-10V power supply for LCD
24 DC+15V power supply for LCD
DC+15V power supply for LCD backlight
27
28,29 Light control signal for LCD backlight
30 External buzzer signal
31 Vibration signal
32,33 DC+5V
34 - 39 Membrane key control signal
XJ2
No.
1 - 14 Debug signal
UNI-7 Service Manual
Signal Name
Signal Name

Chapter 4 ELECTRICAL SIGNALS

Direction Opposite Side
-
→
→
-
-
-
PK-261(XJ3)
-
←
→
→
-
←→
Direction Opposite Side
←→ Unused
4
4-1