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