CurtPalme.com Home Theater Forum

[Curt Palme]

Funny, I've had 3 pieces that I've installed in the last 5 years die this week. One was a Peavey amp way out of town, had to order another one. Another was a power amp at a grocery store. the last one was a Denon AVR1406 that luckily I didn't sell, but the customer bought it and I put it in about 5 years ago. A very basic HT installation, nothing sits on top of the receiver, it's used for grandkids only, so it's never cranked.

Complaint was that it goes into protect within 5 minutes of turning it on. Finding the PC board that the problem was on was easy, I touched the heatsinks of the 4 regulators at the power supply, and the thing shut down. Narrowed it down to one of the two heatsinks, and resoldered all solder joints on the bottom of the regs to start with. Nope, no go.

Changed two of the regulators that I had in stock on that heatsink, it still went into protect. REsoldered all the input and output connections to the board. Nope. Finally ran out and got all new regulators from the local supplier. Sadly, they don't carry the all plastic regulators, so I had mica insulators in stock, so I put in the metal tab regulators, all 4 of them, and everything works fine now.

[Curt Palme]

Funny, I've had 3 pieces that I've installed in the last 5 years die this week. One was a Peavey amp way out of town, had to order another one. Another was a power amp at a grocery store. the last one was a Denon AVR1406 that luckily I didn't sell, but the customer bought it and I put it in about 5 years ago. A very basic HT installation, nothing sits on top of the receiver, it's used for grandkids only, so it's never cranked.

Complaint was that it goes into protect within 5 minutes of turning it on. Finding the PC board that the problem was on was easy, I touched the heatsinks of the 4 regulators at the power supply, and the thing shut down. Narrowed it down to one of the two heatsinks, and resoldered all solder joints on the bottom of the regs to start with. Nope, no go.

Changed two of the regulators that I had in stock on that heatsink, it still went into protect. REsoldered all the input and output connections to the board. Nope. Finally ran out and got all new regulators from the local supplier. Sadly, they don't carry the all plastic regulators, so I had mica insulators in stock, so I put in the metal tab regulators, all 4 of them, and everything works fine now.

[Jeremy112]

Excellent work there Curt With a denon its no surprise the regulators went bad

[Curt Palme]

Correction, it's an AVR-1708

[Curt Palme]

Correction, it's an AVR-1708

[macgyver655]

Gee, I wonder where you got the idea to check those regulators.... Good fix....