CV-1800 Repair Info

Re: Cerwin Vega CV-1800

Protection light is on in one channel. No obvious damage. The P/S seems good and the other channel works fine. This unit was returned to the CV depot twice in the past before the warranty ran out for the same reason. I found a "Goob" job of a resistor piggybacked with another resistor still in circuit for some reason. (I wasn't impressed with the quality of the "Patch" job)

Where might a guy find a repair manual? I'm very capable to do the repair but I want the biasing procedure and test point voltages..

Forgive me if this is in the wrong section. Thanks in Advance!