I currently have a sae 5000 and 2 sae 5000a's. one 5000a works properly one 5000a works properly on one channel but the other channel passes no sound when in the processing mode and the 5000 passes sound in the processing mode but does not remove the clicks. Also on that there seems to be a faint high pitched tone in one channel. I have an oscilloscope and I went thru the working unit probing each I.C. and making note of what I get. For a signal I just put a mp3 of a sine wave with a simulated record skip on it so the working unit is trying to remove that skip, I can here the skip attempting to be removed with the invert button. I have probed the 5000 unit and I see discrepancies in my scope waveforms but my problem is I'm stuck at that point. The pc board isn't labeled the ic's as u1,u2,etc they just label 3 ic's with the sae part number and the other 5 with their sae part number, so my next step was going to be try to figure out what ic's are what by just following the board traces from each pin of an ic to it's component it's connected to and see if I can figure which ic is which. I'm not good at reading that schematic but I really haven't studied it . I imagine there are people that can just look at it and almost immediately see what's going on but that's not me. I work on the old rca selectavision players but I have service manuals for them and they go into great detail on how to find the problems, so I have pretty good luck working on them, but to go at a repair like these sae 5000 A little guidance may go a long way for me.
???? I was hoping someone may have some pointers for me. If it matters, the sae 5000 looked to be set up for 220 volt operation even though there was no sticker on the back indicating that but I changed it back to 110 volt and also added an on off switch. Any help would be greatly appreciated. Thanks in advance.
