Error Message 1; Os Control Error - Canon AS-100M Field Service Manual

7.1.1

Error message 1

When a trouble is detected in initial check of self-analysis,
CRT display displays the following error message:
Q RAM ERR
Remedy:
(2) ERR CODE
Error
code No.
02
03
04
7.2

OS control error

For error correction, refer ot CP/M Users 'Guide or MSDOS Users1
Guide. After troubleshooting, always apply a test program to
the system.
AT XXXX : XXXX
I ---- Offset
----------- Segment
Replace CPU •+ I/0-CONT P.C.B
Optional memory P.C.B
= XX
L ----- Error code No.
Cause
ROM check sum error
PTM-6840 error
Key circuit error
Table 7.1.1
7-2
Remedy
Replace ROM
Replace CPU-E P.C.B.
Replace CPU-E P.C.B.
Replace I/O CONT P.C.B.
Replace KEYBOARD