Cobra 139xlr 40 cn SSB no audio, carrier ok

Took voltage readings on ic4 audio amp and they are super low. From 1v and no higher than 8v.
Eg: pin 4 should have 50v coming in but only has 3v. Pin 9 should be 16 but only 1.5

Could that mean the preamp is bad?

 

Question, if anyone sees this.
As checking voltage at the audio chip IC4 where pin 10 is the output, I accidentally touched 9 and 10 together and the radio worked.

Can someone tell me if that means the chip is bad?

 

Thanks Ridgeline.

 

Replaced the 33uf cap. Positive does go toward the 9 pin if I'm not mistaken.
I turned on with full volume and heard faint static then realized I needed to connect the antenna. When turned back on nothing again.

 

Ok fellas, I apologize for asking the same questions but .......

I replaced C91, 92 and 94.
At the chip, I hope that is what it's called because I've been scolded in other forums on different subjects for not using the correct terminology.

Anyway, pin 1 and 9 have 13.8v, but all the rest are 1v or less including pin 10.

Do you think it's the chip?
Thanks

 

Thanks again ridgeline and yes, I do have a couple of those and preamp chips so I will replace. I hope the next time I post is to say it's working.

 

Thanks again to you guys for the help. Replaced the audio amp chip and all is well now except for a weak transmit barefoot.