Xerox 8850 Service Manual page 43

LL-25 Charge Voltage V HIGH
This fault will occur if the charge voltage, V high, exceeds -580 volts. This generally is a result
of the Erase Lamp being off, the Drum is not grounded the ESV 1 probe is not working, or there
is an open circuit in the Grid on the Charge Scorotron.
Initial Actions
Refer to ADJ 9.2 and perform [0904].
Procedure
Enter [0966] and visually check that the Erase Lamp is on. The Erase Lamp is on.
Y N
Refer to BSD 9.6 and trouble shoot the Charge Erase circuitry.
Check the Drum ground for damage and contamination or an open or short circuit to ground.
There is a short or open or drum ground is damage or contaminated.
Y N
Examine the Electrometer Probe (ESV 1) and the Probe Harness for damage, connectors
not fully connected (BSD 9.1). There is damage to the Probe and/or Harness.
Y N
Check for an open in the Charge Scorotron Grid circuit
Replace the Electrometer Probe and PWB
Clean/Repair the drum ground.
8850/ 510DP
(BSD 9.1).
(PL 9.9).
03/2003
2-9
Status Indicator RAPs
LL-25 Charge Voltage V HIGH