LG PRADA KE850 - Page 85

5. Trouble shooting
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DSR(R116),
FM_SEL_SND(R122) Low
voltage?
Ampís power on?
(Check C249 Bias)
Assemble
Resolder Analog
switch (U103, U105)
Check power LDO
(U204)
Yes
No
No
Check Speaker tension and
Contacts are clear.
C249 is high voltage
when amp on?
Resolder or
Replace Amp
(U205)
Yes
No
Replace Sub PCB
Yes