Hartke Model 2000 Bass Amplifier

[xtian]

This amp has a tube in it....but that's not the problem. Signal arrives at the power board but does not exit. It has a protection circuit made of IC301 (7317) and relay RY301 (I marked these in yellow on the schematic attached). I know these relays go bad--I replaced one in another bass head some time ago.

I need help with a testing approach. How should I test IC301 to determine good/bad? And the relay?

Confused by possible error in schematic (see area in red)--seems like there should be a dot there to indicate a connection...otherwise output jacks aren't connected to anything!

[xtian]

Don't mind me. I'm getting some help over here:

http://music-electronics-forum.com/t36940/