The signal trace shows a 30+ dB drop from input to output around this IC. Looks to be bad.
Tried contacting McIntosh Labs, but they have not gotten back to me in over 2 weeks.
Does anyone have source for this IC? part # 133-002
Tried contacting McIntosh Labs, but they have not gotten back to me in over 2 weeks.
Does anyone have source for this IC? part # 133-002
Likely Philips, ST, Matsushita or Mitsubishi.
Start there, specify voltage, number of pins and supply volts to filter your choice.
The other ICs may be from same supplier, that gives a clue.
See with a strong light at an angle if you can make out any markings, it always upsets me if a maker has sanded off the markings to protect his circuit information, as most are generic from app notes.
The other issue may be finding one for sale, as AM is not popular any more, at least not in India.
Start there, specify voltage, number of pins and supply volts to filter your choice.
The other ICs may be from same supplier, that gives a clue.
See with a strong light at an angle if you can make out any markings, it always upsets me if a maker has sanded off the markings to protect his circuit information, as most are generic from app notes.
The other issue may be finding one for sale, as AM is not popular any more, at least not in India.
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The schematic shows one number, but the IC itself has a different number. And note the pins are cut in about half of the places. The 274-002 is not listed on the semiconductor data. Hmm..
