Lexmark C752 Service Manual page 311

See "System board - non-network" on page 5-6
Connector
J35 Low Voltage Power Supply
J37 Bottom Options Connector
Waste Toner Full
Media Size
or "System board - network" on page
Pin no. Signal
1 +3.3 V dc
2 +3.3 V dc
3 +5 V dc
4 +5 V dc
5 +24V dc
6 +24V dc
7 +24V dc
8 +3.3 V dc Sense
9 Ground
10 Ground
11 Ground
12 Ground
13 Ground
14 Ground
15 Ground
16 Ground
1 Printer TXD
2 Ground
3 Ground
4 Printer RXD
5 +24V_OPTIONS (Through fuse F11)
6 Ground
7 +5V_OPTIONS (Through fuse F9)
8 Staging Encoder
9 ITU_CLNR_FULL
10 N/C
11 Ground
12 WASTE_BTL_PRES
13 TRAY_SIZE_3
14 Ground
15 TRAY_SIZE_2
16 TRAY_SIZE_1
17 Ground
18 +3.3 V dc (Through fuse F13)
19 MEM_DATA (I²C Data to Media Size Card)
20 MEM_CLK (I²C Clock to Media Size Card)
5060-2XX
5-7.
5-17
Connector locations