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METHODOLOGY
1 - SWITCHING "ON" THE TV:
- Observe the behaviour of the two-coloured LED: note the various stages and compare them
with the normal cycle of events.
By watching this, the point at which the problem arises and the part of the circuit which needs
to be investigated cab be identified.
2 - TROUBLESHOOTING PROCEDURE : LED BEHAVIOUR :
In certain cases a flashing LED signifies the transmission of an error code message:
LED flashes : Message transmission.
- Count the flashes : coded into bursts separated by a pause of 0.7s and repeated several times.
répétées plusieurs fois.
See the
ERROR CODE TABLE
3 - FAULT FINDING :
The ICC20 chassis being equiped with two main boards it is necessary to identify in a first time
the defective board and what security is available.
After the check of the
GOOD CONNECTION BETWEEN THE TWO MAIN BOARDS
-
Operation stages 1 and 2:
a - The chassis set operates fully or partially:
- Use LED message observation fault finding methods 1 and 2.
see also the fault related to fault finding by " Symptom ".
b - The chassis set goes into permanent or cyclical security mode :
b.1- Observe LED behaviour (flashing red, stable orange followed by flashing, etc...)
Select the relevant box in the column : " LED behavior fault finding ".
See the Error Code Table information.
For example :
Three attemps to switch on the power supply before standby :
- Error code 25 : +5V not available
- Error Code 35 : +5V and +8V not available.
- error Code 37 : No correct level on the NMI (POWER FAIL) line
indicate a problem of "
POWER / SCAN BOARD
Please Note :
These information give only an indication because, they don't display all the cases : since various fault
generates the same error code or signale a secondary effect relative to the "
for example.
In the service mode, it is possible to consult a record of the latest error codes which have occured in the
television set.
b.2- LED stays off :
Make beforehand the diagnosis of the "
GENERAL INFORMATION
.
".
POWER / SCAN BOARD
SMALL SIGNAL BOARD
" .
"
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