Canon GP215 Service Manual page 239

3. CPU Input/Output Ports of the DC Controller
Address bit
PA0 0 primary charging DC bias
switching
1 developing bias DC application
mode
2 transfer output mode 0
3 transfer output mode 1
4 primary charging roller
ON/OFF
5 static eliminator ON/OFF
6 laser scanner motor reference
clock
7 developing AC drive
PB0 0 scanner motor reference clock
(PCB internal signal)
1 scanner motor CW/CCW rota-
tion (PCB internal signal)
2 composite power supply PCB
communication signal
3 zero cross
4
5 developing DC drive
6 Not used.
7 Not used.
PC0 0 composite power supply PCB
communication signal
1 Not used.
2 upper cassette paper detection
0
3 upper cassette paper detection
1
4 lower cassette paper detection
0
5 lower cassette paper detection
1
6 Not used.
7 Not used.
COPYRIGHT © 1996 CANON INC.
*2* I/O DISPLAY 03
IP PA0 : xxxxxxxx
IP PB0 : xxxxxxxx
IP PC0 : xxxxxxxx
Indication
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
CANCEL
+
–
OK
Signal Jack
HVPH J102-B9
HADCH J102-B8
HVYM0 J102-B7
HVTM1 J102-B6
HVPDC J102-B5
HVD1 J102-B4
FS J112-8
ACON J102-B3
ACK J102-A6
ZC J102-A8
CDON J102-B2
REQ J102-A7
UCRMN
UCRMN J122-1
LCRMN
LCRMN J122-2
J122-3
J122-4
3. OPERATIONS AND TIMING
Logic
3–185