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Roland CUBE 100

Started by tette2, March 14, 2017, 11:21:36 AM

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tette2

Hallo !   This is my first post here .   I have changed all  electr. caps in this guitarcombo .  The amp works fine with a very nice sound if I start it

without a speaker connected .  And then connect the speaker .   But if I have the speaker connected , like it should be normally ,  the amp

tilts and the protection lamp I have in series from the walloutlet  ( 230 VAC )  glows ....  current flows ..... probably through one of the powertransistors while the other is choked..... ?    Thanks for some advice ...   tette

g1

Your protection lamp is causing the problem.
If you do not measure DC voltage on the output with speaker disconnected, then you do not need the protection lamp.