Hi, I have the v1 of this amp. It goes into CAP5 protect (4 flashes, indicating speaker terminal short). But if I plug in headphones, the amp powers up normally.
I have tested the speaker output board and the output transistors for shorts and can't find any? Also, If I unplug the 3 pin connector CN3 - CN8 between the mains power board and the amp board (marked relay), the amp also powers up. Is this a fault in the main power relay or the speaker relay? Any ideas?
I have tested the speaker output board and the output transistors for shorts and can't find any? Also, If I unplug the 3 pin connector CN3 - CN8 between the mains power board and the amp board (marked relay), the amp also powers up. Is this a fault in the main power relay or the speaker relay? Any ideas?
By way of follow-up, when I plug in phones, sound plays normally through phones; no protection fault. As soon as I unplug phones, the amp powers down all circuits except CAP5 (4 flashes). there's a phono board fitted and the green LED goes out. With no phones and the main poweramp/ relay board connector unplugged, the amp powers up without CAP5 but there's no output or power to the phono board. I will try removing the speaker output/relay board and checking it closely out of circuit. I can't find a schematic for the v1, on;y the v2, which has a different output configuration