Xerox Phaser 6360

Phaser 6300/6350/6360 Service Manual 4-3
General Troubleshooting
Power On Self Test (POST)
POST diagnostics provide a quick means of isolating a defective subsystem
associated with the Image Processor Board and SDRAM. There are two kinds
of POST faults: soft and hard. A soft fault is any fault that allows the operating
system to initialize. Soft faults do not stop printer operation and are reported
on the Startup page after the system is running. A hard fault prevents the
operating system from initializing stopping further printer operation. Hard
faults are indicated with blinking LEDs and the failed test appearing on the
display.
The following tests execute when the printer is powered on after the Boot
Loader runs, and before the operating system is loaded and initialized.
Bypass POST by pressing the OK button at power on until the splash screen
displays.
POST Test Descriptions
Test
Fault
Code
Fault
Type
Description
SDRAM 1 Hard This test fails if the boot loader finds no or faulty RAM
(Run prior to POST.). The boot loader displays “RAM
ERROR” and blinks the Health and Control Panel LEDs.
Control
Panel
Hard This test checks the Control Panel connection and
firmware. A fault is indicated on the Health LED.
Extended
Memory
7 This test does a write compare test to each 32-bit word
in extended memory.
EEPROM 10 Hard This test checks addressing of the EEPROM.
Ethernet 11 Soft This test checks the ethernet core.
CPU
Interrupts
12 Hard This test checks that each interrupt to the CPU is
functioning.
USB 13 Soft This test checks that the USB core is functioning
properly.
Real-Time
Clock
14 Soft The real-time clock is tested.
RAM DIMM 15 Soft This test checks RAM compatibility.
Min. RAM 16 Hard Checks that there is at least 128 Mbytes installed.
Control Panel displays “Install More RAM” on failure.
Max. RAM 17 Soft Checks that there is no more than 1 GB installed.
IDE Disk 20 Soft Checks for a hard drive, then checks the disk controller
core.
Engine
Command
22 Hard Checks communications between the Engine Control
and Image Processor boards.