Service Diagnostics Tests; Service Diagnostic Tests And Utilities - Xerox Phaser 6280 Service Manual

Service Diagnostics Tests

Service Diagnostic Tests and Utilities

Phaser 6280 Color Laser Printer Service Manual
Service Diagnostic Test Table
Test Control Panel Display
ESS Diag Tests memory devices on the Controller.
All Test All Test
Start
Processing
Check OK
CodeROM Test CodeROM Test
Start
Processing
Check OK
EEPROM Test EEPROM Test
Start
Processing
Check OK
DRAM Test DRAM Test
Start
Processing
Check OK
MAC+PHY Test MAC+PHY Test
Start
Processing
Check OK
ASIC Test ASIC Test
Start
Check OK
PANEL Test PANEL Test
Start
Button LCD
Note: To exit the Panel Test, press the
simultaneously.
Up Displays Up on the LCD.
Down Displays Down on the LCD.
General Troubleshooting
Test Description
Tests all Controller Diag tests except
for the MAC+PHY and Control Panel
tests.
Calculates the ROM checksum chip by
chip and compares it with the value
stored in the CodeROM itself
beforehand.
When the checksum is identical to the
stored value, this test determines the
chip is normal.
Note: Run this test when error 116-317
occurred.
Performs write/read/verification of the
test patterns (0xff, 0xaa, 0x55, and
0x00) on one byte at every 0x400 from
the first address of EEPROM.
Note: Run this test when errors 116-
323, 116-324, and 116-327 occurred.
Tests Open/Short with the address line
of the DRAM, and performs write/read/
verification on the entire DRAM.
Note: Run this test when errors 116-
315, 116-316, and 116-320 occurred.
Tests PHY Internal loopback test.
Note: Run this test when 116-352,
116-392, 116-393, and errors 116-394
occurred.
Performs register test.
Note: Run this test when error 116-343
occurred.
Checks input and output of the Control
Panel buttons. When buttons are
pressed as shown, the test displays the
corresponding contents on the LED.
Up and Down buttons
4-11