Panasonic UF-490 Service Manual page 52

SC PCB
Signal Name
Pin No.
CN9-7 DATA5
CN9-8 DATA6
CN9-9 DATA7
CN9-10 nACK
CN9-11
BUSY
CN9-12 PE
CN9-13
SELECT
CN9-14 nAUTOFD
CN9-15 Not Used
CN9-16 GND
CN9-17 FG
CN9-18 PLH
Destination
CENTRONICS
+5V(H)
I/F
0V(L)
CENTRONICS
+5V(H)
I/F
0V(L)
CENTRONICS
+5V(H)
I/F
0V(L)
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
CENTRONICS
I/F
Signal Waveform
+5V
+5V
52
Function
Data Signal
Data Signal
Data Signal
Peripheral Clock / Data
Transfer Acknowledge
(Peripheral→Host)
0V
Peripheral Busy
+5V
(Peripheral→Host)
0V
Acknowledge Data Request
+5V
/ Paper Empty Condition
(Peripheral→Host)
0V
Select Signal
+5V
(Peripheral→Host)
0V
Host Busy
(Host→Peripheral)
0V
Not Used
Ground
0V
Ground
0V
+5V Pull Up
+5V