APPLE laserwriter select
Manual de Servicio

Troubleshooting

Flowcharts and Tables

Table 11. Power Supply Failure (+24 VDC)
Step 1 Check Switch off the printer. Connect a multimeter between P11-12 (+24 VDC, orange wire) and P11-2 (GND, black wire) on the DC controller board. Switch on the printer. Is the voltage approximately +24 VDC? Switch off the printer. Connect a multimeter between P11-10 (+24 VDC, brown wire) and P11-2 (GND, black wire) on the DC controller board. Switch the printer back on. When you open and close the front access door, does the voltage measure 0 VDC with the door open and +24 VDC with the door closed? Switch off the printer. Connect a multimeter between P11-11 (+24 VDC, brown wire) and P11-2 (GND, black wire) on the DC controller board. Switch the printer back on. When you open and close the front access door, does the voltage measure 0 VDC with the door open and +24 VDC with the door closed? Result No Action Replace the power supply.

2

Yes

Replace the DC controller board.

3

Yes

Replace the DC controller board.

3
No Replace the power supply.