SCI Multitrak HELP !
2004-01-25 by oxygeno13
Hi all, I recently bought a non working Sequential Circuits Multitrak (SN 01714) Firmaware v2.2, Revision Boards "B" And i found that the 40 pins bridge connector was broken, also the power supply is missing. I repair the 40 pins bridge connector and i bought a transformer 120V->8+8 VAC 1 Amper and i discover that the Voltage regulator IC was bad, i replace them and i could read the voltages again (+5, +15, +6.5 Volts) But nothing is working, when i turn on the multitrak the display and the leds are not lighting. I checked the bridge connector of every pin and all are fine. If anyone have experience with SCI Multitrak or have the Service Manual Schematics could be great helpful for me. BTW, i have another Multitrak working, i exchanged the Voice Board and its working, im thinking that could be the Processor Board, but i dont know whats wrong. This use and SCI Combo IC that i know know whats for is (sequencer ¿¿??. Regards, Akira