Amp Power - LG CM8460 Service Manual

2. NO AMP POWER
If the unit doesn't work by no ±PVDD problem, repair the set according to the following guide.
2-1. FUSE/ FET
2-1-1. Solution
Please check and replace F911, Q905, Q906 on SMPS board.
2-1-2. How to troubleshoot (Countermeasure)
1) Check if the fuse F911 is open or short-circuit.
2) Check the Drain-Source or Drain-Gate, Gate-Source Resistance of Q905, Q906 with a digital multimeter.
  If it is short condition, it's destroyed. Replace it with a new one.
(Please replace 2 FET at the same time although several FET is OK).
2-1-3. Service hint (Any picture/ Remark)
< F911 >
If F911 is not short-circuit,
replace it with a same specifi cations one.
ONE POINT REPAIR GUIDE
If Q905, Q906 is short-circuit,
replace it with a new one.
3-3
< Q905, Q906 >