Hvps (Charge Roll Ac) Operation - Xerox DOCUPRINT N17 Service Manual

5.2.1.20 HVPS (Charge Roll AC) Operation

This diagnostic tests HVPS AC voltage to the Bias Charge Roll.
WARNING! This test switches on the HVPS. Never touch the parts supplied with a high voltage
from the HVPS when running the following diagnostics. The HVPS output voltages
switched on by these procedures can be measured by means of a multimeter. Be
sure to observe the following procedures to check the voltages.
Execute HVPS (Charge Roll AC) Operation:
1 Enter Diagnostics Mode 1. The LCD displays PRINT COUNTER OPERATION indicating the
printer is in Diagnostics Mode 1.
2 Press the MENU UP (1) or MENU DOWN (5) key until the LCD displays HVPS (C. ROLL AC)
OPERATION message.
3 Remove the EP Cartridge from the printer.
4 Bypass the Front Cover interlock switch and the EP Cartridge interlock switch with an Interlock
Bypass key or equivalent.
5 Set the multimeter to read a momentary AC voltage (approximately one second in duration) in
the 1k VAC range.
6 Using alligator clips, connect the multimeter to the following terminals:
• Positive test probe to the rear pin of the two voltage supply pins on the right side of the
Transfer Chute Assembly (see Figure 5.2.1.20.1).
• Negative test probe to the LVPS frame or the printer frame.
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