Canon GP215 Service Handbook page 131

Address bit
PB2 0 STOP
(output) 1 B/H
2 ABC OFF
3 CS
4 LD/RS
5 CLK
6 SIN/UD
7 PRESCAN
PC2 0 bias ON
(output) 1 power SW 0
2 marker ON
3 PAD OFF
4 power SW1
5 area signal switching
6 Not used..
7 Post ratio change reversal
switching
Indication Signal Jack
SERVICE MODE
Logic
CCD control
CCD control
CCD control
CCD control
CCD control
CCD control
CCD control
CCD control
laser control
laser control
for editing board
for editing board
laser control
1: w/ editing board
installed
7–23