Diag Types And Test Contents; Ess Diag; Executing Ess Diagnosis; All Test - Epson AcuLaser C2900N Service Manual

Chapter 2 Operation of Diagnostic

4. Diag Types and Test Contents

4.1 ESS Diag

This section describes how to perform each test of the ESS Diag in detail.

4.1.1 Executing ESS diagnosis

1) Turn off the power.
Turn on the power while holding down " " and " " keys.
2)
3) Release the fingers from these keys when the "CE Mode" and "Password" is displayed.
Press " " key twice and press "OK" key.
4)
The "CE Mode" and "ESS Diag" are displayed. (Entered the Diag. mode.)
5)
Press "OK" key.
6)
Press " " or " " key to select the test item.
7)
Press "OK" key twice to execute the test.
8)
To exit the test or to return to one step higher menu, press the "STOP" key.

4.1.2 All Test

Executes the ESS Diag except the following.
MAC+PHY Test/Panel Test/USB Host Test/RTC Test
Normal
CHECK OK
***:Displays the test name that became error.
(FlashROM/EEPROM/DRAM/ASIC/IOT)

4.1.3 FlashROM Test

Calculates the ROM checksum and compares it with the value stored in the ROM.
Executes this test when the 116-317 error occurred.
Test result: NG (Go to FIP.) OK (Turn off/on the main power.)
This test calculates the checksum of the each ROM, and compares it with the valid checksum value
stored in the corresponding chip beforehand. When the checksum is identical to the stored value, this
test judges the chip is normal.
Normal
CHECK OK
XXX: Displays the header name that became error.
(GLOBE/DACS/PCLFONT/HOSTBASE/CBRIDGE/BMFAPFONT)
Epson AcuLaser C2900N
Error
*** ERROR
Error
FlashROM ERROR
XXXXXX
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