Service
Manual
12. Troubleshooting
12
7
438 9152-31/06
05.03
Errors with no error codes
No indication in the display window (machine
not responding or operates apart from this).
Verify that:
• the machine receives power.
If the power is on, be very careful when
working on the machine.
1. Inspect the fuses F11 and F12 on the communication
card A21.
Fuses OK Defective fuse
Replace the defective fuse.
Reset the machine and
verify it operates correctly.
2. Verify that the voltage supply to the programme is as
shown in the table below. Measure on card terminal
X20.
X20:1 - 2 approx. 1.75 V
X20:2 - 3 approx. 1.75 V
X20:4 - 5 approx. 14.5 V
X20:6 - 7 approx. 13.5 V
One of the voltages is incorrect All voltages are correct
3. Verify that the three glass-tube fuses A1:F1-
F3 on the programme unit are intact.
Fuses OK Defective fuse
Replace the
defective fuse.
The programme unit is probably defective.
Verify that the programme unit EPROM has been
correctly installed.
5182
F11 (T1.25 A)
F12 (T1.25 A)
Continued on the next page.
Fig.
5
Fig.
6
Fig.
7
Fig.
6
5
6125
EPROM circuit
Recess
facing
right
5566 A
6
7
6124
5566 B
EPROM
F1, F2, F3
Alt.
Alt.
X20
F1, F2, F3
X20
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