No Cleaning Unit - Printronix L5000 Series Maintenance Manual

26 – No Cleaning Unit
1. Ensure that the cleaning unit is properly installed.
2. Check the drum cleaner set sensor.
a. Remove connecting jack J21 from the I/O board CN21.
b. Measure the resistance between pins 3 and 4 on the side of the J21. If
3. Check the I/O board.
a. Connect the J21 to CN21 on the I/O board.
b. Put the positive lead of the digital multimeter on pin 3 of CN21 on the I/O
c. Measure the voltage, which should be about 0V. However, if the cleaning
If voltage is not normal, replace the I/O board.
Troubleshooting
CHECKLIST: CLEANING UNIT
DRUM CLEANER SET SENSOR (DCS)
I/O BOARD
resistance is not about 0Ω, replace the DCS.
board, and the negative lead on the SG.
unit error still occurs with the correct voltage measurement, replace the I/O
board.
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