Panasonic UF-490 Service Manual page 60

PNL PCB
Signal Name
Pin No.
LCD-11 RS
LCD-12 V5
LCD-13 VDD
LCD-14 VSS
SENSOR
PNL PCB
Signal Name
Pin No.
SENSOR-1 APLED1
SENSOR-2 APLED2
SENSOR-3 nB4WID
SENSOR-4 GND
SENSOR-5 nAPNT
SENSOR-6 BWLED2
SENSOR-7 BWLED1
Destination
LCD Module-11
+5V
LCD Module-12
LCD Module-13
LCD Module-14
Destination
SENSOR-1
SENSOR-2
SENSOR-3
SENSOR-4
SENSOR-5
SENSOR-6
SENSOR-7
Signal Waveform
+4.8V(Max)
Signal Waveform
+5V
OFF
0V
+5V
OFF
0V
+3.8V
60
Function
Register Select Signal
H: Data Register
L: Instruction Register
0V
Power Supply for LCD
+5 VDC Power Supply
+5V
Ground
0V
Function
LED Enable Signal
+5V
(Document Detect)
0V
LED Enable Signal
+3.8V
(Document Detect)
0V
B4 Width Detect Signal
ON
Ground
0V
Original Detect Signal
(Read Point Detect)
ON
LED Enable Signal
(B4 Width)
Power Supply for LED
+5V