LG CG225 Service Manual page 59

4. TROUBLE SHOOTING
4.9.1. Receiver Trouble
Does sine wave appear
SPK_EN signal is low?
Connection between
FPCB and CN401 is OK?
Soldering between
cable and board is OK?
Cables of receiver
START
at R206,R207?
Yes
Yes
Yes
Yes
are OK?
Yes
No Tr ouble
Set audio part at test equipment as PRBS
or continuous wave, not echo. Set the
audio volume max.
No
ABB is out of order.
Change the boa rd.
No
Re_so ld er t he R212.
Otherw ise ch ange it .
No
Reco nnect FPCB
to CN401
No
Re_so ld er t he cab le
No
Change the receiver
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