No Sound Is Output From Subwoofer - Denon DHT-S514 Service Manual

15. No sound is output from Subwoofer

Start (MAIN PWB)
Check the input signal 20,21 and 22 pin of IC2.
Is the audio signal being input?
Check the output signal 39 and 46 pin of IC2.
Is a PWM being output?
Check the output signal between 1 and 2 pin of J2.
Is the audio signal being output?
Replace the speaker unit.
Finish
YES
YES
YES
NO
Replace Main PWB.
NO
Check the soldering of IC2.
NO
Check the soldering of L4, L5, FB2 and FB4.
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