Post (Power On Self Test) - Konica Minolta IC-304 Plus Service Manual

3.2.2 POST (Power On Self Test)

Code Beep
16h 1-2-2-3
20h 1-3-1-1
22h 1-3-1-3
2Ch 1-3-4-1
2Eh 1-3-4-3
46h 2-1-2-3
Hardware BIOS Virus Protection
The system BIOS is protected by hardware so that no virus can infect the BIOS area.
This feature can prevent viruses from infecting the BIOS area and destroying
valuable data.
Auto-Switching Voltage Regulator for the CPU Core
The 3-phase-switching voltage regulator for the CPU core can support up to 60 A
current and auto-sense voltage IDs ranging from 1.1 V to 1.85 V. This will allow the
regulator to run cooler and make the system more stable.
When you turn on the IC-304 print controller, it performs a series of tests to check
the operation of its components and some of its installed options.
If POST finishes without detecting any problems, a single beep sounds, and the first
screen of the operating system or software program appears.
If POST detects a problem, more than one beep sounds and an error message may
appear on the screen.
Note: A single problem might cause several error messages.
POST Beep Codes
Beep codes are sounded in a series of beeps.
•
One short beep indicates the successful completion of POST.
•
One long beep and two short beeps indicate that there is a video configuration
error.
•
A continuous beep indicates that no memory is detected.
•
Other beep codes are detailed in the following table.
POST Routine Description
BIOS ROM checksum
Test DRAM refresh
Test 8742 keyboard controller
RAM failure on address line
RAM failure on data bits of low byte of
memory bus
Check ROM copyright notice
Recovery Action
•
Try saving the BIOS.
•
Replace the system board.
•
Try replacing the memory.
•
Replace the system board.
Replace the keyboard.
Replace the memory.
Replace the memory.
Replace the system board.
71