Slide # 56
7 Blinks SOS Circuit
Is there 12V at pin 4 of
CN P2 before the TV
shuts down?
No
P board
Start
Does the unit
power up and
stay on?
Yes
Yes
No
A board
LCD Panel
DTV 12V
supply problem.
Is pin 4 of
CN P2
shorted?
Yes
Disconnect the
connector A03.
Is pin 4 of
CN P2
shorted?
Yes
P board
A board
Disconnect
the connector A10/V10.
Plug the unit into the AC
outlet and turn it on using
the main power switch.
No
No
The 17V and SUB3.3V sources are used to power the audio amplifier, IC2106.
If IC2106 becomes defective, either the 17V or 3.3V line will be affected. The 3.3V is directly monitored by IC8001.
In the event of a short, IC8001 shuts down the unit and the power LED blinks 7 times.
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