Verifying Printer Operation By Using Its Self-Test Print; Verifying Power Supply Operation; Measuring Power Supply Voltages - Xerox 1235DT - Phaser Color Solid Ink Printer Service Manual

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
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
system controller board are working correctly and the printer's problem resides
with the network or host interface.

Verifying power supply operation

Required tools
#1 Phillips screwdriver
Digital multimeter (
Verifying the power supply involves four steps:
Measuring the input and output voltages.
Checking the power supply fuse.
Checking its safety interlocks.
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).
3. Power supply fan : With the power switch on, is the main fan running?
(Access the fan by removing the left side cover.) If not, check the fan's
wiring harness (CN5) to the low-voltage power supply board; it should
measure 32 to 38VDC (the voltage drops to zero when the fan is
disconnected). If the voltage is not correct, replace the low-voltage power
supply. Otherwise, replace the power supply fan.
34 Phaser 1235 Network Color Printer
item. Press the
Print Menu