Failure Diagnosis in Start-up Systems
This chapter will focus on the failure location identification in the case that the power does not turn on or the operation panel does not display any indication when turning on the power of the main unit from the operation panel.
Check the specified voltage is supplied to the each board by a tester. Follow the next flow to diagnose.
Flow of voltage supply check
POWER SUPPLY UNIT: 11.0v, 31.7v
MAIN PCB UNIT
7 or 8 pin: 7.9 to 11.0V
1 or 2 or 3pin: 31.7v
19 or 20 or 3pin:3.3v
Precaution for checking voltage supply
- When removing the rear side board cover (with the guide), make sure that the AC power cable has been unplugged from the printer main unit.
- Before performing the diagnosis flow (1), AC power cable needs to be connected to the printer main unit, however, never touch POWER SUPPLY UNIT after connecting the AC power cable.