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Protections
If a fault situation is detected, an error code will be generated; and, if necessary, the
television set will go in to protection mode. Blinking of the red LED at a frequency of 3
Hz indicates the protection mode. In some error cases, the microprocessor does not put
the set in protection mode. The error codes of the error buffer and the blinking LED
procedure can be read via the Service Default Alignment Menu (SDAM), or via
ComPair.
To get a quick diagnosis the chassis has two service modes implemented:
The Customer Service Mode (CSM).
The Service Default Alignment Mode (SDAM).
For a detailed description see Chapter 9 paragraphs 3.4and 4.5.
Repair Tips
Below some failure symptoms are given, followed by a repair tip.
Set is dead and makes hiccupping sound
"Main Power Supply" is available. Hiccupping stops when L5561is de-soldered,
meaning that problem is in the "Main Power Supply" line. No output voltages at
LOT, no horizontal deflection. Reason: line transistor 7460 is defective.
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