i have music in Class A mode!!!!
unit is off and in class A:
i turn it on, i hear just one click. i have good sound, smooth. channel imbalance (one channel is louder) which i have to assume is only due to bias voltages being off.
TP1 - TP2 voltage is zero and does not adjust! (according to the manual should be 300mV in class A mode)
TP1 - TP3 voltage does adjust but it does not go bellow 0.414v in one channel and does not adjust in the other. (should be ZERO)
unit is off in class AB (Normal) mode
i turn it on, both relays click at the same time (at the same instant) and they keep clicking every 5 seconds. every time the relays click all bias voltages go haywire inclusing the rail voltage across the filter caps. why would the class A relay click instantaneously with the protection relay? i dont get it.
the fact that i have uninterrupted clear music in class A but not in class AB, what does it mean? im thinking either something in the power supply board or i just have a wire or some connection wrong? any ideas? i need something to go on with? somewhere to start, i cant just keep randomly pulling compenets off and testing them. i have also gone through all wires 5 times so i need an idea, somewhere to start.
note: I have done extensive recapping in the function board and power supply board and the electrolytic board is almost completely new components but the two amplifier boards (left and right) are 100% untouched. We know that the output transistors are good because the relay clicks and i have clear good music. but beyond those if there is any other fault in those two boards i dont know how to go about checking.
(what you are hearing in this video is both relays clicking at the same time)
please please ... anything. at this point, any ideas.
