Phaser 6180MFP Multifunction Printer Service Manual 4-3General TroubleshootingPower On Self Test (POST)POST Diagnostics provide a quick means of isolating a defective subsystemassociated with the Image Processor Board and SDRAM. POST returnscontrol to the boot loader and the operating system is loaded.The following tests are performed when the printer is powered On.1. Power On.2. Initializes ASIC.3. Checks RAM.■ Chain Link 116-315 is displayed if Included RAM does not match.■ Chain Link 116-316 is displayed if Extended RAM does not match.■ Chain Link 116-320 is displayed if Extended RAM is not supported.4. Processes the ROM Sum Check.■ Chain Link 116-310 is displayed if FONT block does not match.■ Chain Link 116-317 is displayed if another block does not match.5. Initializes the Panel driver.■ No additional message is displayed.6. Initializes Memory Manager.7. Initializes EEPROM driver.■ Chain Link 116-323 is displayed if the error is found in EEPROM0.■ Chain Link 116-326 is displayed if the error is found in EEPROM1.8. Starts the Operating System process.a. Initializes the Operation System resource.b. Starts up process of some device drivers as follows:■ PCI driver (Chain Link 116-333 is displayed if there is an improperdevice)■ IEEE1284 driver■ USB driver■ NIC driver■ HDD driver (Chain Link 116-350 is displayed if the communicationerror occurs)■ Video DMA driverc. Starts up all tasks9. Checks and initializes CRU Register.10. Initializes the Print Engine Controller.■ Chain Link 024-371 is displayed if the communication error occurs.11. Printer is Ready.
