Greetings
I am in need of help repairing a jukebox amplifier--it is stereo Seeburg TSA-5 and the right channel has very low sound. I measured DC voltage on all five transistors, both channels, and the only difference between working and nonworking sides --voltage is low on Q5103&Q5104 collectors being -12.7 instead of the noted 16 v. the two transistors form a darlington amplifier circuit and both checked ok after being pulled(replaced anyway) I checked resistorsR5113,R5115,R5116 pulled out and all were fine. I must have taken an extra stupid pill today because I just don't understand what is going on. schematic included .
thanks for helping an old geezer.
mike
I am in need of help repairing a jukebox amplifier--it is stereo Seeburg TSA-5 and the right channel has very low sound. I measured DC voltage on all five transistors, both channels, and the only difference between working and nonworking sides --voltage is low on Q5103&Q5104 collectors being -12.7 instead of the noted 16 v. the two transistors form a darlington amplifier circuit and both checked ok after being pulled(replaced anyway) I checked resistorsR5113,R5115,R5116 pulled out and all were fine. I must have taken an extra stupid pill today because I just don't understand what is going on. schematic included .
thanks for helping an old geezer.
mike