Lexmark E120 - Page 44

Diagnostic information 2-25
4506-1xx
Controller card
assembly
Check input voltages to the controller card from the LVPS/HVPS.
Warning: Check the following at CN402 on the LVPS/HVPS with the flat cable
unplugged and the printer on. Do not check voltages on a flat cable due to
potential damage to electrical components.
• 24 V dc at pins 18, 16, 15, 14, 13, and 12
If any of these voltages are incorrect, replace the LVPS/HVPS. See “LVPS/
HVPS removal” on page 4-19.
• With the cable unplugged on both ends, check the continuity of the cable. If
the cable is damaged, replace it.
Check the output voltage of the controller card with all cables disconnected on
the controller card except the thermistor at J2 and the LVPS/HVPS at J6. The
measurements should be as follows: (all dc)
Controller card
assembly (continued)
Turn off the printer and connect the front and rear door switches to the controller
card. Close the doors, turn the printer on, and check the following:
FRU Action
Connectors Pins (voltage measured in V dc)
1234567816
J1 (Exit sensor) +5 V GND +5 V GND
J2 (Thermistor) GND
J3 (Cartridge) +5 V
J4 (Main mtr) +5 V +5 V +5 V +5 V GND +5 V
J5 (USB)
J6 (LVPS/
HVPS)
+5 V
J9 (Transfer) +5 V +5 V GND +24 V
J10 (Solenoid) +24 V
J11 (Rear cvr) GND GND GND
J12 (Mirror mtr) GND +24 V
J13 (LSU) GND GND +5 V
J14 (Front cvr) +5 V GND GND GND
J15 (Op panel)+5 V+5 V+5 VGND +5 V+5 V+5 V
Connectors Pins
12345678
J11 (Rear cover) +5 V dc GND GND GND
J13 (LSU) GND +5 V dc GND +5 V dc +5 V dc