Service
Manual
12. Troubleshooting
12
20
438 9152-31/06
05.03
12E
The programme unit cannot read the
programme memory (EPROM).
If the power is on, be very careful when
working on the machine.
Try to restart the machine (i.e. reset the error
code) by pressing the Start button quickly.
If the error returns, troubleshoot as follows:
1. Disassemble the programme unit. Remove, then
reinstall the programme memory (EPROM). Verify that
all circuit pins are correctly set in the holder. Restart
the machine.
Error message returns No error message
Poor contact or program
memory incorrectly set.
2. Replace the program memory (EPROM). Verify that
the programme version of the new memory is correct.
Restart the machine.
Error message returns No error message
Incorrect programme
memory (EPROM).
The programme unit is probably defective. (The old
programme memory is probably correct and can be used
again.)
Fig.
24
Fig.
24
24
5566 B
EPROM
Alt.
6125
EPROM circuit
Recess
facing right
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