Xerox 3450B Service Manual - Page 59

Negative Transfer Voltage -800V, Developer Bias +500V turns

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Function Function Function Description Display HVPS Dev Bias Charge Roll Transfer Roll (+) Transfer Roll (-) Pre-transfer Lamp (PTL) Laser Scanning Unit (LSU) Laser Diode Laser Ready Fuser Fuser Control OPC (Print Cartridge) Cycle Read OPC Cycle 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 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) 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) 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) 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 Diode turns on when OK is pressed and goes off when Cancel is pressed. Laser Diode Test (ON/ OFF) Displays the appropriate message Laser when the LSU is ready to print (laser Ready Test diode is on, polygon speed stable). (Pass/Error) 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] 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] 3-12 Phaser 3450 Laser Printer Service Manual

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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