Rotel RA 413 R channel low signal on Phono only HELP!

[rat_tat]

Hi all

Phono output is soft in the right channel.

Things ive tried to narrow down the issue.
- Use headphones through front HP jack = same issue
- searched for dry joints, resoldered a few = same issue
- connected speaker to the Tape Out rca outputs, = same issue


All other parts of the amp work properly

Hope this can be a simple fix. I really need your expertise.

Cheers
Dean

 

[rat_tat]

Also played music through my phone into the phono inputs, Same issue

 

[century tek]

Have you tried cleaning the pots and switches yet??

 

[rat_tat]

Have you tried cleaning the pots and switches yet??

yes with proper spray cleaner. no crackles and all working well. the problem is only when switched to phono

 

[rat_tat]

Can anyone help?

 

[Ylli]

Well, if it is on phono only, and you are confident the switches are all clean, then the problem must be in IC402 or associated circuitry. I don't normally like to 'shot gun' things, but in this case it might be easiest to start by replacing C404, C410, and C418.

 

[rat_tat]

Well, if it is on phono only, and you are confident the switches are all clean, then the problem must be in IC402 or associated circuitry. I don't normally like to 'shot gun' things, but in this case it might be easiest to start by replacing C404, C410, and C418.

OK, ill order those 3 Caps and replace. Ill report back once done. Thanks so much for your help

 

[cademan]

Wait! Did you swap the phono cables to see if the fault followed the swap?

 

[Ylli]

Wait! Did you swap the phono cables to see if the fault followed the swap?

Good thought Cademan. Rat_tat, swap the signal input cables and see if the problem remains on the right or if it moves to the left.

 

[rat_tat]

Wait! Did you swap the phono cables to see if the fault followed the swap?

Yes, the fault remained on the right channel

 

[rat_tat]

Ordered Caps through Ebay. It will be a while until they arrive