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CARE AND MAINTENANCE

DIAGNOSTIC and ADJUSTMENT procedures are outlined in the diagnostic disk and manual package. Order Part #314052-01 Version 3.0 & 3.5 Diagnostic Package.

POWER UP DIAGNOSTIC FOR 8050/8250 FLASH CODE

On power up, the three LED's on the drive should blink. The drive LED's go off and the center Tri-State LED remains green. The sytem has a built in self diagnostic which can be read in the form of a flash code. In the event of a failure, the 3 LED's will blink in a repetitive sequence. The number of blinks between intervals will indicate the possible location of a failure.

ERROR INDICATIONS
NUMBER OF
FLASHES
ERROR CAUSE COMPONENT LOCATION
1 Zero Page 6532 UC1,UE1
2 ROM $E0000-$EFFFF 2364 UL1
3 ROM $C000-$DFFFF 2364 UH1
4 Unused
5 Zero Page 6530
6502
UK3
UH3
6 Common RAM $1000-$13FF 2114 UC4,UC5
7 Common RAM $2000-$23FF 2114 UD4,UD5
8 Common RAM $3000-$33FF 2114 UE4,UE5
9 Common RAM $4000-$43FF 2114 UF4,UF5
10 Controller ROM 6530
6502
UK3
UH3

If the LED's come on and stay on, the microprocessor UN1 is probably at fault.



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This page has been created by Sami Rautiainen.
Read the small print. Last updated August 27, 1998.