Forum: Troubleshooting Power Supplies and Power Supply Design
02-24-2021, 03:23 AM
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Replies: 1,678
Views: 395,730
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Forum: Troubleshooting Audio Equipment
02-17-2021, 02:03 PM
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Replies: 16
Views: 370
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Forum: Troubleshooting Audio Equipment
02-17-2021, 12:59 PM
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Replies: 16
Views: 370
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Forum: Troubleshooting Audio Equipment
02-15-2021, 01:51 PM
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Replies: 16
Views: 370
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Forum: Troubleshooting Audio Equipment
02-14-2021, 07:16 PM
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Replies: 14
Views: 371
Re: Mitsumi M32E-3 CD tray motor
There are many such small DC motors available on AliExpress etc. How long they last is a different story, but you may well find one that can fit.
Again, it would help to see a photo of the...
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Forum: Troubleshooting Audio Equipment
02-14-2021, 07:14 PM
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Replies: 16
Views: 370
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Forum: General Electronics Technical Discussion
01-27-2021, 01:09 AM
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Replies: 7
Views: 293
Re: Have you tried to socket mosfet?
Good point. In the past I bought various cheap connectors with plastic that couldn't stand much heat. Another reason to buy real branded parts from known suppliers. I think Dave Jones did a video on...
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Forum: General Electronics Technical Discussion
01-22-2021, 08:18 PM
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Replies: 10
Views: 469
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Forum: General Electronics Technical Discussion
01-22-2021, 08:15 PM
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Replies: 87
Views: 1,376
Re: How could I find a FET with specific specs?
That circuit takes the small current available from the micro-controller pin, and amplifies it with the transistor to drive the LEDs.
This will turn them on full.
But PWM turns them on and off...
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Forum: General Electronics Technical Discussion
01-22-2021, 08:02 PM
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Replies: 7
Views: 293
Re: Have you tried to socket mosfet?
Why do you want to use sockets? There should be no need. I would not use them for a MOSFET for fear of loose connection. Even at low loads an intermittent connection could cause damage depending on...
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Forum: General Electronics Technical Discussion
01-22-2021, 07:59 PM
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Replies: 13
Views: 561
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Forum: General Electronics Technical Discussion
01-22-2021, 07:51 PM
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Replies: 18
Views: 4,335
Re: Repairing Remotes
The most confusing remote repair I did was on my Sony STR-DE545 amplifier.
The remote stopped controlling the amplifier.
The remote had a red LED on it to show when commands were being...
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Forum: General Electronics Technical Discussion
01-22-2021, 07:41 PM
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Replies: 6
Views: 320
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Forum: Troubleshooting Power Supplies and Power Supply Design
12-28-2020, 06:43 PM
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Replies: 173
Views: 56,641
Re: LiteOn PA-6601-1A (600w) blows its TOP
Maybe he meant SOIC package? That may be okay for high voltage depending on the pinout and circuit design - some integrated PWM/FET chips run in a SOIC-8 package (albeit often with only 7 pins) for...
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Forum: Troubleshooting Power Supplies and Power Supply Design
12-28-2020, 03:44 AM
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Replies: 173
Views: 56,641
Re: LiteOn PA-6601-1A (600w) blows its TOP
Do those MOSFETs switch mains?
Probably when those original ones blew, they shorted and damaged their drive circuitry (or it contained the original fault).
Now with damaged drive circuits, the...
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Forum: Troubleshooting Audio Equipment
12-19-2020, 02:28 PM
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Replies: 111
Views: 51,370
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Forum: Troubleshooting Audio Equipment
12-17-2020, 12:31 AM
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Replies: 111
Views: 51,370
Re: Logitech Z506 power supply
Does the power supply still output correct voltage after the speaker stops working? Then you can find if it's a power supply or speaker problem.
It seems these can handle 19v OK, going by the...
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Forum: Troubleshooting Audio Equipment
12-16-2020, 10:58 PM
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Replies: 111
Views: 51,370
Re: Logitech Z506 power supply
Please add photos in another post - on your first post I don't think you can add pictures but after that you can.
Do you have freezer spray? You may try to use that to find an overheating issue...
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Forum: Troubleshooting Power Supplies and Power Supply Design
11-23-2020, 01:27 PM
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Replies: 52
Views: 6,735
Re: Raidmax RX-600 ringing noise and 0ms PG
Nice job!
The photo isn't bad, I can see everything okay.
But yeah, I was pretty sure that diode didn't look so good. Always a good idea to investigate anything that looks physically damaged.
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Forum: Troubleshooting Power Supplies and Power Supply Design
11-17-2020, 12:58 PM
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Replies: 52
Views: 6,735
Re: Raidmax RX-600 ringing noise and 0ms PG
The electrolytic could if it were open-circuit, or if the TL431 was shorted.
Or even if the transistor were shorted B-E the capacitor may charge too fast through it. But that seems unlikely.
This...
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