Hello, working on a T1000-1bdcp. Power supply was smoked so I replaced power supply mosfets, output mosfets, 2 transistors on ps card, all three rail caps, and r200 on bd card. The amp powers up and plays but is drawing 3.6 amps at idle. The amp has a small speaker pop on turn on and draws less current when gain is turned up and as gain goes up I am getting a whine in speaker. Any advice? I have swapped a known good ps card and bd card with no changes.
Yes.
Without a capacitor tester, it's difficult. With a scope, you could at least look to see how much noise you have on the speaker output.
Do you have another capacitor like that (or something close)?
Without a capacitor tester, it's difficult. With a scope, you could at least look to see how much noise you have on the speaker output.
Do you have another capacitor like that (or something close)?
Do you have any 10uf capacitors?
Update the information in your sig line with the make/model of the scope.
Update the information in your sig line with the make/model of the scope.
I do not. Do you know what the voltage at the power supply rectifiers cr1004 and cr1005 should be I'm getting 225v dc and 250v DC. They are only rated at 200v dc
The reason I ask is I keep getting a door creaking out of the power supply torroids on start up.
Are you measuring the rail voltage with one meter probe on the center legs of the two rectifiers (no probe on ground)?
At this point. I wanted you to try ANY other 10uf cap. At idle, any cap will work.
Remember to update your sig line with the make/model of your scope.
Remember to update your sig line with the make/model of your scope.
There should be essentially no voltage across the speaker terminals. The voltage isn't really critical since you're not going to drive audio into it. This is just to test for noise on the output and maybe just a few volts of audio.
If you want to drive audio into a speaker, you can connect two polarized caps in series, negative terminals connected. Positive terminals to ± speaker terminals. 22uf@100v would be ideal but you can use almost anything above 22uf and near 100v if you intend to drive audio into them.
If you want to drive audio into a speaker, you can connect two polarized caps in series, negative terminals connected. Positive terminals to ± speaker terminals. 22uf@100v would be ideal but you can use almost anything above 22uf and near 100v if you intend to drive audio into them.