Anyone have any ideas why this unit blow all of the opamps ?
And anyone know of any good replacements for the
TC40GGBP, C4570HA
And anyone know of any good replacements for the
TC40GGBP, C4570HA
Attachments
Whatever it was, it happened at the top left in pix 4 - or maybe that's just powder burns. There's also some blown 4066 analogue switches, it looks like Q10 has a cracked case as well and who knows what damage there is on the sub-board top right pix 2.
The only thing in common with all the semiconductors is the power supply. To get all of the chips to explode like that I would think a serious over-voltage event that the fuse was too slow to catch, plugging a 12 volt unit into 24 volts, or reversing the +12v and chassis, or short-circuiting the power supply capacitor.
There is a possibility of damage to electrolytic capacitors, resistors, even potentiometers from the same event. You'd want to be pretty clear on what caused the failure and whether is worth the effort to repair before you start working on it. There's some on eBay under $AU100.
The only thing in common with all the semiconductors is the power supply. To get all of the chips to explode like that I would think a serious over-voltage event that the fuse was too slow to catch, plugging a 12 volt unit into 24 volts, or reversing the +12v and chassis, or short-circuiting the power supply capacitor.
There is a possibility of damage to electrolytic capacitors, resistors, even potentiometers from the same event. You'd want to be pretty clear on what caused the failure and whether is worth the effort to repair before you start working on it. There's some on eBay under $AU100.
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Possibly not even repairable. I expect there are possibly blown PCB tracks as well.
If there is a proprietary IC chip you would need a donor EQ-6500 to repair yours. But if you find a donor unit that isn't working, it is likely to be easier to repair the donor unit than yours, which really has gone through Armageddon and lost.