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TC Electronic A/S
M5000 Service manual
page 8
Self Test Procedure:
Each time the M5000 or the M5000X is powered on, a quick test is done.
The test in BIOS version 1.07, 2.00 and 2.01 consist of these steps:
•
All 4 LEDs on the CPU board are turned on.
•
Check BIOS EPROM checksum, if the checksum is bad LD1 on the CPU-board
will turn on, and if the front panel is working then the preset LED's will show
'E01'. The M5000 will then halt.
•
Part of the dynamic RAM is tested, if the RAM is bad LD2 on the CPU-board will
turn on, and if the front panel is working then the preset LED's will show 'E02'.
The M5000 will then halt.
•
Contact to the LCD display is tested, if no contact is established LD1 and LD2 on
the CPU-board will turn on, and if the front panel is working then the preset
LEDs will show 'E03'. The M5000 will then halt.
•
LD4 on the CPU-board will stay on showing power is on.
LED error codes for M5000 only:
LD1
LD2
LD3
LD4
Comments
on
on
on
on
init.
off
off
off
on
test ok
on
off
off
on
E01, BIOS Eprom checksum error
off
on
off
on
E02, Dynamic RAM error (IC24-27)
on
on
off
on
E03, LCD not found
off
off
on
on
E04, Unexpected interrupt
The test in the M5000X (BIOS version 3.00) consist of these steps:
•
Both LEDs on the CPU board are turned on.
•
Check BIOS EPROM checksum, if the checksum is bad LD1 on the CPU-board
will turn on.The M5000X will then halt.
•
Part of the dynamic RAM is tested, if the RAM is bad LD2 on the CPU-board will
turn on. The M5000X will then halt.
LED error codes for M5000X only:
LD1
LD2
Front LED
Comments
on
on
orange
init.
off
off
red
test ok
off
off
green
software runs
off
off
blinking
red/orange
Programming Flash
on
off
red blink
E01, BIOS Eprom checksum error
off
on
red blink
E02, Dynamic RAM error (IC24-27)
on
on
red blink
E03, LCD not found
off
off
red blink
E04, Unexpected interrupt
