I've got a 2285B that I'm trying to revive, it's turning out to be a real basket case! It had some bad corrosion on the chassis and some of the wire connections, which I have taken care of for the most part. I also rebuilt the power supply and recapped the main amp, pre, and tone boards. Also all transistors replaced in the preamp and tone boards, and triple checked for correct orientation. The amp section is good, bias and offset adjusted properly. Problem now is that the left channel works fine but right side is very weak, and I suspect the problem is somewhere in the preamp. Here is what I've done so far: -All switches, pots, and jacks on front and back panel cleaned. No scratchiness present when operating any of these. Volume control on left channel behaves normally, volume on right channel is variable but much lower than left channel. -Tried criss-crossing preamp and main-in jacks with patch cables. Problem moves to other channel, which rules out main amp as the problem. -Tried both sets of speaker jacks. Tried using Aux and tape 1 input jacks. Same behavior. -Checked for broken wires between pre and tone boards, everything is tight. -Checked CE40 for proper orientation, I have it installed opposite of the board silkscreen which I believe is correct. -at JH09 and JH10 I have around -18v and 18v where the schematic shows -20v and 20v. Voltages on most of the transistors on this board are similar from left channel to right channel but slightly lower than what the schematic lists. The only real difference I could find was QH04 emitter voltage is -4.4v while QH03 is -4.1v. Something is not right there but I'm not sure where to look. These are all new replacements - 2 x ksa992 for the 2sa798 and ksc1845 for the 2sc1345's. I'm kind of stumped, do you guys have any suggestions for where to look next?