Forum: Schematic Requests ONLY!
04-25-2022, 11:07 AM
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Replies: 0
Views: 63
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
04-25-2022, 11:04 AM
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Replies: 0
Views: 90
LG-V410 Tablet - No Power - Need to recover data
This device was dropped and now when press power button amp draw is 110ma and soon as release power button drops to 0.
Any schematics or boardview for this model? Or suggestions on what to try?
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Forum: General Electronics Technical Discussion
04-19-2022, 02:45 PM
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Replies: 2
Views: 165
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
04-07-2022, 09:58 AM
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Replies: 2
Views: 180
Surface Laptop 2 1769 - No Power - Need Data
Hi everyone have this 1769 doesn’t power on. When power button pressed following happens:
- Backlight no display for 5 seconds
- Quick black screen
- Backlight no display for 5 seconds
...
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Forum: General Electronics Technical Discussion
12-25-2021, 04:19 PM
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Replies: 7
Views: 406
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Forum: General Electronics Technical Discussion
12-25-2021, 01:23 PM
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Replies: 7
Views: 406
Re: Oven DSI igniter cleaning?
Is the gap size crucial at all like a spark plug? Or just bend it slightly and should be good to go?
Another thing does the rod have to be perfectly straight? Mine has a minimal bend to it. Looks...
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Forum: General Electronics Technical Discussion
12-25-2021, 12:31 PM
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Replies: 7
Views: 406
Oven DSI igniter cleaning?
My oven has been randomly turning on when selecting bake. Broil works fine as well as the stove top heaters.
Checked and noticed the ignitor doesn’t ignite. Read that sometimes cleaning the tip...
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Forum: General Electronics Technical Discussion
12-16-2021, 07:15 PM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
At least that’s what my capacitor tester said. Yeah original is 2200pf
Would the smaller cap cause the light to go out and cause secondary issues?
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Forum: General Electronics Technical Discussion
12-16-2021, 06:02 PM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
Turns out it was the green cap across the lamp terminals. Didn’t have exact one so momentarily substituted with a 483pf one. Lamp lit then went off and puff of smoke came from the circuit board lol....
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Forum: General Electronics Technical Discussion
12-14-2021, 06:07 PM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
So at the output of the tea sudores it would be ac voltage again? Just seeing what I could measure before that point to help see if the transistors are doing anything.
Curious how does higher...
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Forum: General Electronics Technical Discussion
12-14-2021, 05:00 PM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
Yes it bridges one of the two filament pins. I tried without the cap but still nothing.
Im confused on how you would test this circuit if the output voltage is high frequency. Is an oscilloscope...
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Forum: General Electronics Technical Discussion
12-14-2021, 03:35 PM
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Replies: 42
Views: 4,425
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Forum: General Electronics Technical Discussion
12-14-2021, 09:56 AM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
The lamp tests good. The capacitor not sure if it’s good or bad but could only measure in ohms and gives a reading of 1.2 ohms across it when disconnected from the lamp
I may have previously...
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Forum: General Electronics Technical Discussion
12-13-2021, 02:40 PM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
@redwire Yes that’s the one you’ve linked. There are 4 wires that connect to the lamp itself further up and two of them have a capacitor across them.
What’s a good way to test if the circuit is...
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Forum: General Electronics Technical Discussion
12-13-2021, 11:01 AM
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Replies: 42
Views: 4,425
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Forum: General Electronics Technical Discussion
12-13-2021, 09:33 AM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
How many volts should I see at the lamp terminals when first powered on? I’m measuring 126v then drops to 86v
Does that mean the circuitry is working and possible bad replacement lamp?
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Forum: General Electronics Technical Discussion
12-12-2021, 02:02 PM
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Replies: 42
Views: 4,425
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Forum: General Electronics Technical Discussion
12-12-2021, 12:30 PM
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Replies: 42
Views: 4,425
Re: Fluorescent desk lamp repair
Revisiting this. Changed the cap and one of the transistors previously and it worked all this time.
Just recently quit again, this time no caps blew up and no shorts on the transistors or diodes...
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Forum: Troubleshooting TVs and Video Sources
09-22-2021, 06:15 AM
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Replies: 3
Views: 396
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Forum: Troubleshooting TVs and Video Sources
09-21-2021, 12:56 PM
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Replies: 3
Views: 396
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Forum: Troubleshooting TVs and Video Sources
09-20-2021, 11:34 AM
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Replies: 3
Views: 396
LG 29LB4510 - Backlight on no display
Powers on/off fine. Backlight visible but nothing on the screen, just black display.
Made following checks on t-con
V33v12 = 3.3v
Vgl = -7.8v
Vgh = 27v
Rx5 = 3.3v
Rx4 = 3.3v
Rx3 (1k ohm)...
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Forum: General Electronics Technical Discussion
07-08-2021, 02:15 PM
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Replies: 26
Views: 6,360
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Forum: General Electronics Technical Discussion
05-09-2021, 08:52 AM
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Replies: 29
Views: 2,815
Re: Harbor Freight car battery chargers any good?
Seems to be working ok so far. Checked this morning and the display is green and displaying 13v
After removing the charger the voltage on the battery with a dvm reads 13.12v is that normal right...
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Forum: General Electronics Technical Discussion
05-08-2021, 10:39 PM
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Replies: 29
Views: 2,815
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