Xerox 3450B - Phaser B/W Laser Printer, Service Manual, Page: 59 / 180

3-12 Phaser 3450 Laser Printer Service Manual
HVPS Dev Bias Developer Bias (+500V) turns on
when OK is pressed and goes off
when Cancel is pressed. Measure
voltage with a DMM, if required.
Dev Bias
Test (ON/
OFF)
Charge Roll Charge Roller Voltage (+1200V)
turns on when OK is pressed and
goes off when Cancel is pressed.
Returns an ADC value for voltage.
Charge Roll
Test (ON/
OFF)
Transfer
Roll (+)
Positive Transfer Voltage (+1200V)
turns on when OK is pressed and
goes off when Cancel is pressed.
Returns an ADC value for voltage.
Transfer
Roll (+) Test
(ON/OFF)
Transfer
Roll (-)
Negative Transfer Voltage (-800V)
turns on when OK is pressed and
goes off when Cancel is pressed.
Measure voltage with a DMM, if
required.
Transfer
Roll
(ON/OFF)
Pre-transfer
Lamp (PTL)
PTL turns on when OK is pressed
and goes off when Cancel is
pressed. Visual confirmation is
possible with the cover open and the
Print Cartridge out.
PTL
(ON/OFF)
Laser
Scanning
Unit (LSU)
Laser Diode Laser Diode turns on when OK is
pressed and goes off when Cancel
is pressed.
Laser Diode
Test (ON/
OFF)
Laser
Ready
Displays the appropriate message
when the LSU is ready to print (laser
diode is on, polygon speed stable).
Laser
Ready Test
(Pass/Error)
Fuser Fuser
Control
When “Target Temp” displays,
(default is 150º C), use the arrow
buttons to change target if desired,
and press OK. The target temp and
current temp will display on the
bottom line. Change is only effective
during test and does not change
operationg temp. Bracketed letter
following the target temp indicates
Fuser state: [O] is on [X] is off.
Target/
Current
XXX / XXX
[O]
OPC (Print
Cartridge)
Cycle
Read OPC
Cycle
Displays the currently stored value
for the number of cycles by the Print
Cartridge. Ranges are as follows:
10K Cartridge:
■
78,000 = Toner Low
■
92,000 = Replace Cart.
5K Cartridge:
■
39,000 = Toner Low
■
46,000 = Replace Cart.
Total OPC
Cycle
[XXX]
Function Function Function Description Display