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Repair / LEM Baby Echo Mixer Amp Issue
« Last post by uslrs on Today at 10:33:58 am »Hi All, I'm restoring this LEM Baby (built in the 1970's) and there has been a major issue with the power amp and repairs carried out at some point in the past. I've been unable to find a schematic, only one for a later version which has an IC in the first stage and has a complementary output pair, which mine hasn't. I've produced a schematic (attached) from the pcb but most of the transistors are unmarked and I'm not sure whether they are original or replacements. I'm struggling to make any sense of this design so would much appreciate any help or information which might enable me to get this power amp working. I've attached a notated photo of the pcb components to identify the transistors in the schematic. Hoping someone recognizes this and can provide some information. Many thanks.