Tascam 688 led pcb 521028630-00 the later MS-16 types used

the later MS-16 types used cheaper parts

It  though could do with a good clean and buff

at first i thought it was the standard one but this has a different pcb number so have listed it like this

Board from the 3500 and 3700 mixer think was only 1 in the unit I have now only the -03 and -04 variants though I am guessing they are pin for pin compatable as the buss boards never changed

so you have to try and trace faults and hope you dont have to take the board out

Tascam 688 led pcb 521028630-00 the later MS-16 types usedBoard from a 688 and maybe common in some others The 688 was really the flagship analogue portastudio amazing what the could get on 1 8 inch tape I was amazed how heavy and how big the machine was must be 15 kilos maybe, Nearly all the boards inside are with connectors so its one that can be serviced easier