I restored and recapped a SU-V7 and did all the adjustments except I can't get this one to work. Everything else works and sounds good. However, I can't get this one last adjustment to work. I think I am following it correctly.
I am using a 8 ohm load in parallel with a 33 ohm resistor (both 1%) so I get 6.44 ohms. I connect everything including the jumper and turn it on and I can get VR702 to adjust TP702 to -0.1 VDC but VR701 does nothing to TP701 which stays around 17+/-0.5 VDC no matter what position the pot is in (no change noted as I move the pot from CW to CCW. I tried replacing both pots with no effect. Also, I can verify that with 6.2 ohm load, it gets the correct supply voltage (~37V); with 8 ohms, I get the right voltage (~47V). With the jumper (TP703 to chassis) the unit doesn't come out of protection but once I remove it, the protection turns off.
Any suggestions? This seems to simple to get wrong and it is driving me crazy!!
I am using a 8 ohm load in parallel with a 33 ohm resistor (both 1%) so I get 6.44 ohms. I connect everything including the jumper and turn it on and I can get VR702 to adjust TP702 to -0.1 VDC but VR701 does nothing to TP701 which stays around 17+/-0.5 VDC no matter what position the pot is in (no change noted as I move the pot from CW to CCW. I tried replacing both pots with no effect. Also, I can verify that with 6.2 ohm load, it gets the correct supply voltage (~37V); with 8 ohms, I get the right voltage (~47V). With the jumper (TP703 to chassis) the unit doesn't come out of protection but once I remove it, the protection turns off.
Any suggestions? This seems to simple to get wrong and it is driving me crazy!!
