Teac ag-d9100 stereo receiver

[Mike4]

Hi All! and thank you for taking a peek at my frustrations and hopefully helping . Anyhow, I have a Teac ag-d9100 audio video surround sound receiver and the front right and left speakers work great as well as B channel.. But when I go to use the Center or surrounds left and right rear, there is practically nothing , but there is a faint sound music , but barely noticeable.. Other than just using it as a stereo I
d really like to get the other speakers going again . Anyone have any suggestions or experience dealing with stereos? Thanks in adavnce

 

[kuntao]

I would guess it is a transistor problem. If you have power you should first establish that there are no solder fractures or melted solder from connections. Next, look for burns on the PC board and exploded ceramic capacitors and diodes or bulging plastic capacitors! Test you power supply for specified from a service manual! From your service manual find the diagram and the power protection relays if your sound is intermittent.

However, you seem to have no gain so I would look at diodes and transistors and the potentiometer volume controls after above! Check for loose wires as above! Check resistance values on you Multi Meter!