Canon Super G3 Fax Board-J1 Service Manual page 22

G3 fax control PCB (J101) ¬ ®NCU PCB (J2)
J101 J2 signal
1 6 AGND
2 5 NC
3 4 +12V
4 3 ANLGIN
5 2 TX
6 1 RX
G3 fax control PCB (J102)¬ ®NCU PCB (J1)
J102 J1 Signal
1 1 DGND
2 2 BIT2
3 3 BIT1
4 4 BIT0
5 5 LPL2
6 6 LPL1
7 7 HOOK2
8 8 HOOK1
9 9 CI0R
10 10 CI2
11 11 CI1
12 12 LPRD
13 13 DCD
14 14 CMLD
15 15 HRD
16 16 PRD
17 17 SRD
18 18 VHGND
19 19 VHGND
20 20 VH
21 21 VCC
22 22 +3.3V
23 23 DGND
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000
CHAPTER 2 BASIC OPERATION
Description
analog ground
not used
relay power supply
line monitor signal
4-line transmission signal
4-line reception signal
Description
digital ground
for future use
for future use
for future use
line polarity signal 2 (H=L2 positive)
line polarity signal 1 (H=L1 positive)
external telephone off-hook detection signal (H=off-hook)
extension telephone off-hook detection signal (H=off-hook)
CI1 and CI2 OR signal (H=C1 present)
CI detection signal 1 (H=CI present)
CI detection signal 2 H=C1 present)
polarity reversal detection relay drive signal (H=ON)
DC relay drive signal (H=ON)
CML relay drive signal (H=ON)
H relay drive signal (H=ON)
P relay drive signal (H=ON)
S relay drive signal (H=ON)
VH ground
VH ground
off-hook detection power supply
ESS 3.3 V all-time drive power supply
logic drive voltage
digital ground
CANON SUPER G3FAX BOARD-J1 REV.0 JUNE 2001
2-7