Post by stephane54 on Sept 29, 2024 3:07:16 GMT
Hello,
On my MM2 with R-3760A I have noise and hum everytime, right and left speaker
Mute is ok , I tried mute relay manually.
I tried without the 2 driver boards, without tube lights
I changed the 4 power transistors
I tried with an other pre-amp board
I tested the 2 little plates with 3 diodes 1N457 , no difference between each diodes
I changed C87 on line high voltage
I tried with an other amplifier R-3760A : no hum
Somebody has an idea ? maybe can capoacitor 1500 or 2000µF?
Stephane
On my MM2 with R-3760A I have noise and hum everytime, right and left speaker
Mute is ok , I tried mute relay manually.
I tried without the 2 driver boards, without tube lights
I changed the 4 power transistors
I tried with an other pre-amp board
I tested the 2 little plates with 3 diodes 1N457 , no difference between each diodes
I changed C87 on line high voltage
I tried with an other amplifier R-3760A : no hum
Somebody has an idea ? maybe can capoacitor 1500 or 2000µF?
Stephane
