I am working on a pioneer TP-900, it's brand new fresh outta the original box and packaging, but it's obviously gonna have some issues. The first noticeable issue is the #1 IC on the IF/MPX board, it basically leaked out a dark tacky substance which was at one time some kind of sealant. The problem I have run into is you can no longer find a replacement, they're just not really available. The IC that went bad was a H8D1177, so my mission right now is to find a substitute or alternative, if anyone knows a solution or maybe a different IC that I could replace it with I would love to here your opinion. I have included a couple pics of the bad IC below.
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Oh dear. The crystal filter and coil are unlikely to have failed, the method of your fault finding and reasoning seem far away from reality.
If it has not been powered up for a long time, coupling and decoupling electrolytics will, more than likely, be all that is required. Sadly too late now judging by the method of removing the components, so far.
Such a shame to destroy a nice piece of older kit.
If it has not been powered up for a long time, coupling and decoupling electrolytics will, more than likely, be all that is required. Sadly too late now judging by the method of removing the components, so far.
Such a shame to destroy a nice piece of older kit.
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The picture I included in my original post is literally how I found those components, I did not desolder anything from the board. All 6 legs of that IC had completely corroded just above the board surface and it was no longer attached, all that was still connected to the board were the broken tips of those 6 legs. Luckily there is no damage to the actual board or pads, I was able to just desolder all the broken tips from the board. When it comes to that IC, I didn't disassemble that either, the two ceramic filters and small board that was in the black plastic housing also just fell out, you can see that the pads pulled off the board and are still attached to the filters. The only thing I did to those parts was clean off the black sticky goo they were once encased in, there was no disassembly, that's literally how I found everything