Phaser 6128MFP Service Manual 4-3
General Troubleshooting
Power On Self Test (POST)
POST Diagnostics provide a quick mean of isolating a defective subsystem
associated with the Image Processor Board and SDRAM. POST returns control to
the boot loader and the operating system is loaded.
The following tests are performed when the printer is powered On.
1. Checks and initializes CRU Register.
2. Initializes ASIC.
3. Checks RAM.
4. Initializes the Control Panel driver.
5. Processes the ROM Sum Check.
6. Initializes Memory Manager.
7. Initializes EEPROM driver.
8. Initializes IOT Controller.
9. Starts the Operating System process.
POST Test Description
Test Error Description
CodeROM 116-317 This test calculates the ROM checksum chip
by chip and compares it with the value stored
in CodeROM.
FontROM This test calculates the FontROM checksum
chip by chip and compares it with the value
stored in FontROM.
116-310 Checksum error is in the built-in FontROM.
116-317 Checksum error is in the main program ROM.
EEPROM This test verifies the EEPROM.
116-323 Error in EEPROM0 during initialization.
116-326 Error in EEPROM1 during initialization.
DRAM This test checks the DRAM.
116-315 Error if included RAM is different.
116-316 Error if extended RAM is different.
116-320 Error if extended RAM is not supported.
MAC+PHY Test 116-352 This test performs PHY internal loopback.
ASIC 116-343 Performs register test.
PANEL This test checks Control Panel function.
IOT 024-371 This test performs communication tests
between the print engine and controller.
To Next Page
Loading...
