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Old 1st March 2012, 03:32 PM   #1
diyAudio Member
Join Date: Feb 2011
Default Bugera 1990 Help

I made a HUGE mistake while working on a Bugera 1990 guitar amp head. To repair a failed component in the bias circuit I removed the power tube board along with the pre-amp tube board and did not document the interconnections between them.

Bugera / Behringer will not under any circumstances release the schematic to me nor any information contained in the schematic. The local authorized service centers also will not release the schematics or any info on them.

What I am looking for and hope someone out there has this information is the interconnections between the pre-amp board and the control board (the one with the pots on it). For example X33 goes to X46.

Can anyone help me with this? This amp needs to be back in service this coming Saturday March 3rd.


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