Receiver Trouble - LG F1200 Service Manual

• Receiver Trouble

START
Check the Resistance
between R541 and R549
(R524 and R550) ~0 Ohm?
YES
Does Sine Wave appear at
R549, R550 ?
YES
The Connection between
FPCB and Main Board is OK?
YES
Soldering status of CN400 and
Receivers is OK?
YES
Check the Resistance between
+ /— port of Receiver~28Ohm?
YES
FPCB is out of order.
Change the FPCB.
Set the audio volume to max. level
Set Audio mode of test equipment as
continuous wave mode
NO
Resolder or Replace R541, R549
(and R524, R550)
NO
ABB is out of order.
Change the Board.
NO
Reconnect the FPCB
NO
Resolder the CN400 and Receiver
NO
Chang ethe Receiver
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4. TROUBLE SHOOTING