I have an Onkyo TX-SR501 reciever/home theater amp. The sound works fine in home theater mode, but no sound when FM mode selected, but fine in AM mode. Have checked Antenna.

Check output transistors for short, change emitter resistors

You can go to the manual at the link below and follow the directions

Links

MAke sure your channel selection is correct.

champ natwork problem

Hello Fixya customer,

Thank you for your question.

Please determine if the "Audio" button is actually working.... after pressing the audio button, can you still control the DVD, if not then the remote has switched to the Onkyo. Although, this is not 100% conclusive, unless you have a 2nd remote to test the Onkyo with, it provides a sound basis to proceed.

Assuming the remote is transmitting and the IR receiver on the front of the Onkyo is not otherwise blocked, likely faults include the IR receiver, input to the Micro processor, and the Micro processor.

The most probable fault is the IR receiver.

Thank you for using Fixya, and if I can help you further, please let me know.

The chances are that you have selected an incorrect sound setting or not switched it on, for the HDMI you are using. With Onkyo receivers each connection will have it own settings for video and sound. You just need to look in the manual as to how to select the settings.

Make sure your receiver is hooked up to proper AM and FM antennae. Try switching to AM, scan stations. If you hear AM static and/or weak signals the problem could be antennas are not hooked up. FM has AFT which blocks out weak or noisey stations and you wont hear anything without ant.

I think what I might do is use an optical splitter: http://www.amazon.com/Digital-Bi-Directional-Optical-Toslink-Splitter/dp/B0002MQGR2, does anyone have any experience with this?

Most of the time its the amps that are bad and need changing. This will be transistors on heatsink in the reciever. Part number should be on the amp.

check speaker fuses.