Archive of the former Yahoo!Groups mailing list: The Yamaha AN1x Synthesizer mailing list

as there are no schematics its hard to see what is doing the muting circuits

all i can see there is several dual opamps and a dac and some custom yamaha asics

there seems to be some dc blocking caps get an esr tester and test them to see if you have any faulty ones

even on the block diagram it shows that the amp output goes to the phones and then muting then outputs

but does not show where the signal from the muting comes from or where it goes
for a service manual its very limiting i will contact yamaha uk to see if i can get a copy of the schematics as i now the main tech and have had many schematics in the past

in the parts list there is only 2 transistors 1 of each type the others are transistor arrays

so it could be those 2 as there are no jfets in the parts list and no relays

but from your picture i dont see and smd or standard transistors