Hi,

i'm totally new to amp repairs and just did some googling lately to try and locate the problem I have with
my Princeton Solid State Amp. (Fender Princeton 112, Tupe: PR226)
The amp still works but has a certain type of distortion on it as soon as you raise
the volume past 1 on the clean channel and as immediately on the drive channel.

The troubleshooting I did so far was to get the head of and have a quick look to see if I could see some obvious errors, I took some pictures while it was open:
http://imgur.com/a/zKp7T#0

After that I disconnected the speaker and reverb to see if that caused any problems.
Went with the headphone in the output only with the head and still had the same distortions but not as quick as on the speaker.

I recorded the distortion with my audio interface:
http://yourlisten.com/blueboo/amp-troubleshooting

Was wondering if there's any things that you think I should test / have a look at.
A friend of mine has a basic multimeter and knows how to work them so could measure some things up..

Also found a schematic for the amp online but the resoulution is quite low:
http://elektrotanya.com/fender_princeton-112-plus_sch.pdf/download.html

Hopefully this is the right place for this issue.

Thanks in advance,

Michiel