Xerox 3450B - Phaser B/W Laser Printer Service Manual page 59

Function Function
HVPS Dev Bias
Charge Roll
Transfer
Roll (+)
Transfer
Roll (-)
Pre-transfer
Lamp (PTL)
Laser Laser Diode
Scanning
Unit (LSU)
Laser
Ready
Fuser Fuser
Control
OPC (Print Read OPC
Cartridge) Cycle
Cycle
3-12
Function Description
Developer Bias (+500V) turns on
when OK is pressed and goes off
when Cancel is pressed. Measure
voltage with a DMM, if required.
Charge Roller Voltage (+1200V)
turns on when OK is pressed and
goes off when Cancel is pressed.
Returns an ADC value for voltage.
Positive Transfer Voltage (+1200V)
turns on when OK is pressed and
goes off when Cancel is pressed.
Returns an ADC value for voltage.
Negative Transfer Voltage (-800V)
turns on when OK is pressed and
goes off when Cancel is pressed.
Measure voltage with a DMM, if
required.
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.
Laser Diode turns on when OK is
pressed and goes off when Cancel
is pressed.
Displays the appropriate message
when the LSU is ready to print (laser
diode is on, polygon speed stable).
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.
Displays the currently stored value
for the number of cycles by the Print
Cartridge. Ranges are as follows:
10K Cartridge:
5K Cartridge:
Phaser 3450 Laser Printer Service Manual
78,000 = Toner Low
■
92,000 = Replace Cart.
■
39,000 = Toner Low
■
46,000 = Replace Cart.
■
Display
Dev Bias
Test (ON/
OFF)
Charge Roll
Test (ON/
OFF)
Transfer
Roll (+) Test
(ON/OFF)
Transfer
Roll
(ON/OFF)
PTL
(ON/OFF)
Laser Diode
Test (ON/
OFF)
Laser
Ready Test
(Pass/Error)
Target/
Current
XXX / XXX
[O]
Total OPC
Cycle
[XXX]