Verifying Printer Operation By Using Its Self-Test Print; Verifying Power Supply Operation; Measuring Power Supply Voltages - Tektronix Phaser 550 Service Manual

Verifying printer operation by using its self-test print

Verifying power supply operation

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. When the Ready message is displayed, press the Menu button to enter
the menu.
3.
Press the scroll buttons to navigate to the Test Print's menu item.
Select any test print.
4. Press Print to print a test prints. The printer should print a test page
from the image processor memory.
If the printer prints a test pattern, then the print engine and image processor are
is working correctly and the printer's problem resides with the network or host
interface. Refer to the appropriate topics in Chapter 3 "Verifying the Printer and
Host Connections."
Required tools
#1 Phillips screwdriver
Volt-ohm-meter (VOM)
Verifying the power supply involves four steps:
Measuring the input and output voltages.
Checking the power supply fuse(s).
Checking its safety interlocks.
Testing for a shorted motor which would shut down the power supply
or damage the engine control board.

Measuring power supply voltages

1. Turn off the printer and unplug it from its power outlet.
2. AC Input: With the VOM 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 power supply fan
running? If not, check the fan's wiring harness (CN853) to the power
supply; it should measure 24 VDC. If the voltage is not correct,
replace the power supply. Otherwise, replace the power supply fan.
Troubleshooting
Service Manual 6-3
6