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#1
Posted to rec.audio.tech
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Yamaha P2250 Amp, Protection
I've a problem with this amp that has me scratching my head. It's been
gone over and no apparent shorted output transistors or drivers and others along those lines. This condition appears with no load or input of any kind. I've got a copy of the Users Manual but not the service manual. Can someone help me with a new trail to follow. My strength is Tv repair, I'm up for a challenge most of the time so if you can help, please do so, thank-you! Cheers, Steve |
#2
Posted to rec.audio.tech
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Yamaha P2250 Amp, Protection
"Stevie D" wrote in message ... I've a problem with this amp that has me scratching my head. It's been gone over and no apparent shorted output transistors or drivers and others along those lines. This condition appears with no load or input of any kind. I've got a copy of the Users Manual but not the service manual. Can someone help me with a new trail to follow. My strength is Tv repair, I'm up for a challenge most of the time so if you can help, please do so, thank-you! Cheers, Steve I can send you a PDF of the service manual - I've glanced at the schematic and I'd be suspicious of C135 in the power supply and any electrolytics near the TA7317P protection IC's - this unit appears to use 2 of them... Mark Z. |
#3
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Quote:
I worked on a friends about two years ago and I can remember the overtemp circuit interupted power for it becouse of a bad connection on one of the jacks. If I remeber correctly it was a Molex style plug? Mark. Would you be kind enough to share the service manual with me. It could save me a ton of time if I require another repair in th future? Best regards, Tom eh |
#4
Posted to rec.audio.tech
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Yamaha P2250 Amp, Protection
Hi, I have a P2150. If that service manual applies to it also,
could you send the pdf to me? Thanks, westpase. On Nov 8, 5:50*pm, "Mark D. Zacharias" wrote: "Stevie D" wrote in message ... I've a problem with this amp that has me scratching my head. It's been gone over and no apparent shorted output transistors or drivers and others along those lines. This condition appears with no load or input of any kind. I've got a copy of the Users Manual but not the service manual. Can someone help me with a new trail to follow. My strength is Tv repair, I'm up for a challenge most of the time so if you can help, please do so, thank-you! Cheers, Steve I can send you a PDF of the service manual - I've glanced at the schematic and I'd be suspicious of C135 in the power supply and any electrolytics near the TA7317P protection IC's - this unit appears to use 2 of them... Mark Z. |
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