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EN 34
5.
BJ3.1A LA
5. 1 long blink of 3 s to finish the sequence,
6. The sequence starts again.
5.6.2
How to Activate
Use one of the following methods:
•
Activate the SDM. The blinking front LED will show the
entire contents of the error buffer (this works in "normal
operation" mode).
•
Transmit the commands "MUTE" - "062500" - "OK"
with a normal RC. The complete error buffer is shown.
Take notice that it takes some seconds before the blinking
LED starts.
•
Transmit the commands "MUTE" - "06250x" - "OK"
with a normal RC (where "x" is a number between 1 and
5). When x= 1 the last detected error is shown, x= 2 the
second last error, etc.... Take notice that it takes some
seconds before the blinking LED starts.
5.7
Protections
5.7.1
Software Protections
Most of the protections and errors use either the stand-by
microprocessor or the VIPER controller as detection device.
Since in these cases, checking of observers, polling of ADCs,
filtering of input values are all heavily software based, these
protections are referred to as software protections.
There are several types of software related protections, solving
a variety of fault conditions:
•
Protections related to supplies: check of the 12V, +5V,
+8V6, +1.2V and +3.3V.
•
Protections related to breakdown of the safety check
mechanism. E.g. since a lot of protection detections are
done by means of the VIPER, failing of the VIPER
communication will have to initiate a protection mode since
safety cannot be guaranteed any more.
Remark on the Supply Errors
The detection of a supply dip or supply loss during the normal
playing of the set does not lead to a protection, but to a cold
reboot of the set. If the supply is still missing after the reboot,
the TV will go to protection.
Protections during Start-up
During TV start-up, some voltages and IC observers are
actively monitored to be able to optimise the start-up speed,
and to assure good operation of all components. If these
monitors do not respond in a defined way, this indicates a
malfunction of the system and leads to a protection. As the
observers are only used during start-up, they are described in
the start-up flow in detail (see paragraph "Stepwise Start-up").
5.7.2
Hardware Protections
There are no real hardware protections in this chassis.
Although, in case of an audio problem, the audio protection
circuit will switch "off" the main supply. The stand-by
microprocessor will interpret this as a mains dip and will try to
start up again. This will lead to error 14 (audio protection).
Repair Tips
•
It is also possible that you have an audio DC protection
because of an interruption in one or both speakers (the DC
voltage that is still on the circuit cannot disappear through
the speakers).
Service Modes, Error Codes, and Fault Finding
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