Hi everyone,
I would like to ask you for some help in identifying the problem with this LCD TV.
It is Toshiba, Model 26AV600A. Its Power Supply board is marked 715G3370-1.
I did try to locate the circuit diagram for the PSU but no luck, and without the schematics I am a bit blind in diagnostic.
The symptoms are:
-at powering the set the front LED shows Green
-one or two seconds later it turns to Red
-no response from the remote control or the side buttons
-voltage at the main filter cap 340V
-STBY 5V OK
-no 24V, no 12V
Power IC (designated on the board as IC950) is an 8-pin chip A6069H. I took some voltage measurements there, and they are:
-pin 1 0V
-pin2 about 6V
-pin 3 GND
-pin4 0.8V
-pin 5 around 14V but varies
-pin 6 not connected
-pin 7 and 8 340V
Attached below: picture of the Power Supply board and datasheet of the Power IC.
I would be very grateful for your guidance here.
Regards
Markus1
I would like to ask you for some help in identifying the problem with this LCD TV.
It is Toshiba, Model 26AV600A. Its Power Supply board is marked 715G3370-1.
I did try to locate the circuit diagram for the PSU but no luck, and without the schematics I am a bit blind in diagnostic.
The symptoms are:
-at powering the set the front LED shows Green
-one or two seconds later it turns to Red
-no response from the remote control or the side buttons
-voltage at the main filter cap 340V
-STBY 5V OK
-no 24V, no 12V
Power IC (designated on the board as IC950) is an 8-pin chip A6069H. I took some voltage measurements there, and they are:
-pin 1 0V
-pin2 about 6V
-pin 3 GND
-pin4 0.8V
-pin 5 around 14V but varies
-pin 6 not connected
-pin 7 and 8 340V
Attached below: picture of the Power Supply board and datasheet of the Power IC.
I would be very grateful for your guidance here.
Regards
Markus1
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