Xerox Phaser 6280 - Service Diagnostics Tests; Service Diagnostic Tests and Utilities

Phaser 6280 Color Laser Printer Service Manual 4-11
General Troubleshooting
Service Diagnostics Tests
Service Diagnostic Tests and Utilities
Service Diagnostic Test Table
Test Control Panel Display Test Description
ESS Diag Tests memory devices on the Controller.
All Test All Test
■ Start
■ Processing
■ Check OK
Tests all Controller Diag tests except
for the MAC+PHY and Control Panel
tests.
CodeROM Test CodeROM Test
■ Start
■ Processing
■ Check OK
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.
EEPROM Test EEPROM Test
■ Start
■ Processing
■ Check OK
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.
DRAM Test DRAM Test
■ Start
■ Processing
■ Check OK
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.
MAC+PHY Test MAC+PHY Test
■ Start
■ Processing
■ Check OK
Tests PHY Internal loopback test.
Note: Run this test when 116-352,
116-392, 116-393, and errors 116-394
occurred.
ASIC Test ASIC Test
■ Start
■ Check OK
Performs register test.
Note: Run this test when error 116-343
occurred.
PANEL Test PANEL Test
■ Start
Checks input and output of the Control
Panel buttons. When buttons are
pressed as shown, the test displays the
corresponding contents on the LED.
Button LCD
Note: To exit the Panel Test, press the Up and Down buttons
simultaneously.
Up Displays Up on the LCD.
Down Displays Down on the LCD.