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8.3 Indicating faults
In the case of a fault on the display, we must distinguish between the following:
- If the error message
Err 32Err 32
Err 32Err 32
Err 32 appears (fault in the display control), simply replace the display module without performing further tests.
- Likewise, if a single segment or an LED has failed, replace the display module.
- If the entire display appears much too dark, check whether the auxiliary power supply P
ANZ has failed:
First, check the continuity of fuse F6 on the transformer
(or measure: 7 V ~ between grey and red).
Examine the display module to ensure that connector
X3 to the transformer is in order and that the auxiliary
supply P
ANZ is rectified:
PANZ = 7 V
The measuring points are on the rear of the display
module; see adjacent diagram.
If the results of these checks are negative,
replace the display module.
i In order to avoid damage when opening up the
display module on the front panel, press all buttons
at the same time.
Take care not to damage the LED's!
Diagram, power supply of display module,
simplified representation
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