Sex3.0 c4s strange voltages

pebjerg

New member
hi. Build the sex3.0 Kit and had the running for a year. Decided to mount the c4s kit.

startede by making a real beginners bump by connecting one wire wrong. When measuring, no leds on the right side, no voltage on OB( leds fine on the other side and OA is 73.4v).

Then i made shorts circuit on the MJE5731AG between left leg and middle leg, Nice spark, and a resistor burned, the 8.2 kohm between 20L and 21L.
bought a new resistor and a new MJE5731AG and replacement the old ones.
 Now voltages is 73.4 v on the OA, no leds on the right channel but 267v measured on OB. Tried to reflow all solderings on the right side of the board, no change. Any suggestions is really welcome.

Best regards Peter
 
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