Ncu Board - Canon Pixma MP530 Service Manual

3-2. NCU Board

J1 (to Logic Board)
No. Signal name
1 A_GND
2 +12V
3 RX
4 TX
5 SNOOP
6 D_GND
7 IPSEL
8 +3.3V
9 CI1
10 HRD
11 CMLD
12 HOOK1
13 SRD
14 DCLIM
15 +5.5V
16 D_GND
J2 (Modular Jack, TEL / LINE)
TEL : Pin 1 to 6
LINE : Pin 7 to 12
J3 (Power Supply Unit)
No. Signal name
1 VH+
2 VH-
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Analog ground
Analog power supply
4-wire analog reception signal
4-wire analog transmission signal
Snoop signal
Digital ground
Terminal switch signal
Digital power supply
CI detect signal 1 (1: CI
H relay drive signal (1: ON (no ring)
CML relay drive signal (1: ON 0: OFF)
Hook detect signal (1: ON 0: OFF)
S relay drive signal (1: ON 0: OFF)
Not used
Mechanical relay power supply
Digital ground
External telephone line hook detect power supply
VH ground
<Part 3: 3. CONNECTOR LOCATION AND PIN LAYOUT ; 3-2. NCU Board>
Function
0: No CI)
0: OFF (ring))
Function
3-9
Input / Output
-
IN
OUT
IN
OUT
-
-
IN
OUT
OUT
IN
IN
IN
IN
IN
-
Input / Output
-
-
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