Forum: Troubleshooting Game Consoles & Other Weird Devices
12-10-2021, 01:47 PM
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Replies: 248
Views: 144,372
Re: Dim Clock LCD on Jenn-Air wall oven
I see that this specific subject has generated amazing interest over the years. Certainly, replacing electrolytics on the display pcb will bring back the Jenn Air (and others) display brightness.
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-09-2019, 09:59 AM
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Replies: 9
Views: 1,569
Re: Fixin computer power supplies as a hobby
I agree that fixing dead power supplies is fun and definitely a learning experience. Some of those designs are one of a kind even though the general ideas stay the same.
My thinking on this...
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Forum: Troubleshooting Game Consoles & Other Weird Devices
04-21-2018, 09:46 AM
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Replies: 248
Views: 144,372
Re: Dim Clock LCD on Jenn-Air wall oven
While replacing caps on the display board used to be a great idea, keep in mind that even with a working display pcb, the VFD displays wear out and dim with age. There is nothing you can do other...
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Forum: General Electronics Technical Discussion
04-21-2018, 09:31 AM
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Replies: 17
Views: 1,483
Re: LM317 constant current question
Commendable
It is typical to find most technical literature devoted to looking at the world from a voltage perspective. For some reason people have no problem with the idea that the ideal voltage...
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Forum: General Electronics Technical Discussion
04-21-2018, 08:50 AM
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Replies: 20
Views: 1,986
Re: Questions about leds in series.
Of course you can run them in a series string. Prove it to yourself by putting them together on a bread board. I don't know why anyone would ask for trouble in this way, but it CAN be done if the...
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Forum: General Electronics Technical Discussion
04-21-2018, 08:36 AM
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Replies: 55
Views: 3,565
Re: Help with LED brake lights
Key point: unknown manufacturer, item purchased on auction site.
From personal experience, there is a wide variation in the quality of discreet led's as well as with automotive LED modules. Some...
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Forum: General Electronics Technical Discussion
04-18-2018, 07:27 AM
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Replies: 55
Views: 3,565
Re: Help with LED brake lights
Reading the schematic (with difficulty), refer to page 3-16. #160 appears to be the brake switch, which then connects to a computer unit, #118. The stop light is #639, appearing on page 3-45. If...
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Forum: General Electronics Technical Discussion
04-18-2018, 06:44 AM
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Replies: 55
Views: 3,565
Re: Help with LED brake lights
Sorry if I find this very funny. I've never had any problems like this, but it is very interesting. I'd like to know the brand or the web site that provided the LED unit. I've always had good luck...
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Forum: General Electronics Technical Discussion
02-03-2018, 05:29 PM
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Replies: 8
Views: 1,395
Re: Auto engine management ecu
We are positively inconvenienced by a question of such generality as yours. If you have a particular vehicle, or a particular fault your are tracing, perhaps there could be some intelligent...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
01-30-2018, 10:26 AM
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Replies: 48
Views: 5,542
Re: Oven broiler stuck on!!!!
The broiler element draws high and constant current. It is likely that the broiler relay needs to be replaced. I imagine that the relay contacts welded themselves together and it will happen again...
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Forum: Troubleshooting Audio Equipment
01-30-2018, 10:21 AM
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Replies: 7
Views: 1,746
Re: Sencor SCD 3554 MR - no backlight
The open circuit voltage across the faulty LED will not be the same as when that LED gets replaced. Order a few SMD parts of the proper size, and they will most likely work fine. There are already...
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Forum: General Electronics Technical Discussion
01-27-2018, 08:00 PM
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Replies: 7
Views: 1,400
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
01-20-2018, 12:49 PM
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Replies: 22
Views: 3,399
Re: Netgear R6300v2
The link to the NVRAM chip tells you which pins do what. These things don't have a unique reset pin, but are reset via serial data commands. Don't worry with the chip, unless you have found that...
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Forum: Troubleshooting Audio Equipment
01-20-2018, 12:36 PM
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Replies: 9
Views: 1,306
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Forum: Troubleshooting Audio Equipment
01-20-2018, 12:33 PM
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Replies: 5
Views: 1,793
Re: Sony mds JA 30 ES minidisc
Since the symptom can be reproduced, just get out your heat gun and find out what part of the unit is sensitive to heat. Or wait for failure and selectively freeze various things. Better than...
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Forum: General Electronics Technical Discussion
01-15-2018, 01:10 PM
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Replies: 25
Views: 2,419
Re: Overvoltage protection design ideas
There IS an ideal solution to your problem, as described. A box of units cobbled together is not going to require high level engineering for you to get into operation. In fact, at this point you...
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Forum: Troubleshooting Audio Equipment
01-13-2018, 07:25 PM
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Replies: 4
Views: 1,271
Re: Marantz Tuner issues
Unlikely that you would have power supply hum on one higher station but none on any lower stations. Does your unit have the hum problem with a simple FM dipole? I'd say the next troubleshooting...
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Forum: General Electronics Technical Discussion
01-12-2018, 07:31 PM
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Replies: 3
Views: 1,030
Re: Scr / thyristers
That particular spec means that the device has to withstand at least 200v. reverse. But there are other important specs with thyristors, especially the turn-on voltage and turn-on pulse width...
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Forum: Troubleshooting Audio Equipment
01-12-2018, 09:02 AM
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Replies: 3
Views: 1,916
Re: YAMAHA RX-V775 Strange Problem
That figures. That's why the symptoms always change from day to day. There is no way to fix it, unless you can get a spare board from another unit.
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Forum: General Electronics Technical Discussion
01-12-2018, 08:55 AM
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Replies: 59
Views: 6,694
Re: EEPROM function confusion
Freezing the chip is just one method of stressing it in hopes that an internal part or connection will re-connect and start working temporarily. Heating it up, or heating individual pins might also...
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Forum: Troubleshooting Audio Equipment
01-09-2018, 09:45 PM
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Replies: 3
Views: 1,916
Re: YAMAHA RX-V775 Strange Problem
After flashing the firmware you should get a message saying that the flash is successful. If so, you don't have a firmware problem and it won't be fixed by doing another update. First, do the...
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Forum: Troubleshooting Game Consoles & Other Weird Devices
01-09-2018, 09:36 PM
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Replies: 14
Views: 1,691
Re: Furnance Fan Timer Control Board ST9103A1002
One relay operating the coil of another relay doesn't sound like an overload situation. Interesting to check the schematic to see what is going on. On the other hand, the coil of heavy duty 120VAC...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
01-07-2018, 03:15 PM
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Replies: 22
Views: 3,399
Re: Netgear R6300v2
Was any testing done after the successful flashes? I would need to know if the unit works fine in place doing routing. If it does work, but does not survive a power-off cycle then you have a couple...
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Forum: Troubleshooting Game Consoles & Other Weird Devices
01-04-2018, 09:47 AM
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Replies: 14
Views: 1,691
Re: Furnance Fan Timer Control Board ST9103A1002
I don't see any mention of how the problem was fixed, or at what point the system started working. Can you give us any information? You replaced the relays in your first post, which would be the...
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