Lexmark Optra Color 1200 Service Manual page 47

5050-001
Message or Symptom
Error
985 Thermistor Error
Belt Thermistor Open
986 OHP Sensor Error
2-8
Service Manual
Action
1. Be sure the thermistor
connector under the transfer
guide is properly connected.
Also be sure CN107 is properly
connected to the printer
controller board.
2. Unplug the connector and
check for 10K ohms
conductance of the belt
thermistor.
3. Replace the belt unit
(11G0202).
4. If you still have the problem,
replace the printer controller
board (11G0324).
1. Be sure connector CN132 is
properly connected to the
printer controller board.
2. Replace the OHP sensor.
3. If you still have a problem,
replace printer controller
EEPROM U107.
4. If you still have a problem,
replace the printer controller
board.