Xerox 2135DX - Phaser Color Laser Printer, Service Manual

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32 Phaser 2135 Color Printer
Verifying printer operation by using its self-test print
1.
If not already on, turn on the printer. If the printer does not power up, or
does not initialize, or the printer initializes but the motors do not run
properly, go to the next topic “Verifying power supply operation.”
2.
Verify that the system controller board’s health LED is flashing. The health
LED is viewable through the rear panel. If the health LED is not flashing,
then the system controller board is not working.
3.
When the
Ready
message is displayed, press the Menu (1, 5) buttons to
enter the menu.
4. Press the
Menu (1, 5)
buttons to navigate to the
Print Menu
item. Press the
Item (2, 6 ) keys to scroll through the list of available test prints. Select any
test print.
5.
Press
Enter
to print a test prints. The printer should print a test page from
the system controller board.
If the printer prints a test pattern, then the print engine controller board and the
system controller board are working correctly and the printer's problem resides
with the network or host interface.
Verifying power supply operation
Verifying the power supply involves four steps:
■ Measuring the input and output voltages.
■ Checking the power supply fuse.
■
Checking the safety interlocks.
■
Ensuring the +5 VDC loop is complete.
■
Testing for a shorted motor which would shut down the power supply
or damage the engine controller board.
Measuring power supply voltages
1. Turn off the printer and unplug it from its power outlet.
2.
AC Input:
With the DMM set to measure AC voltages, measure for power
being supplied to the printer. It should measure between 87 to 128 VAC
(115 VAC nominal) or 174 to 250 VAC (220 VAC nominal).
Required tools
■
#1 Phillips screwdriver
■
Digital multimeter (DMM)