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Search: Posts Made By: caphair
Forum: General Electronics Technical Discussion 06-09-2022, 07:20 PM
Replies: 5
Views: 423
Posted By caphair
Re: Anyway to increase the temperature of this preheater?

Thereís a plug that connects to it with an on/off switch in line with the cord going to mains. Is mains converted to 12v somewhere?
Forum: Schematic Requests ONLY! 04-25-2022, 11:07 AM
Replies: 0
Views: 79
Posted By caphair
LG-V410 Schematic and Boardview request

Anyone have any of those for this model tablet?
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-25-2022, 11:04 AM
Replies: 0
Views: 110
Posted By caphair
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?
Forum: General Electronics Technical Discussion 04-19-2022, 02:45 PM
Replies: 5
Views: 423
Posted By caphair
Anyway to increase the temperature of this preheater?

Itís a preheater for iPhone models X-11 that use low melt 138c solder between the sandwiched layers. Has a constant temp setting of 180-190c

I want to use it for newer iPhone 12 models which use a...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-08-2022, 06:19 AM
Replies: 2
Views: 199
Posted By caphair
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-07-2022, 09:58 AM
Replies: 2
Views: 199
Posted By caphair
Surface Laptop 2 1769 - No Power - Need Data

Hi everyone have this 1769 doesnít power on. When power button pressed following happens:

- Backlight no display for 5 seconds
- Quick black screen
- Backlight no display for 5 seconds
...
Forum: General Electronics Technical Discussion 12-25-2021, 04:19 PM
Replies: 7
Views: 441
Posted By caphair
Re: Oven DSI igniter cleaning?

Do you mean clean the white porcelain part as well?
Forum: General Electronics Technical Discussion 12-25-2021, 01:23 PM
Replies: 7
Views: 441
Posted By caphair
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...
Forum: General Electronics Technical Discussion 12-25-2021, 12:31 PM
Replies: 7
Views: 441
Posted By caphair
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 doesnít ignite. Read that sometimes cleaning the tip...
Forum: General Electronics Technical Discussion 12-16-2021, 07:15 PM
Replies: 42
Views: 5,350
Posted By caphair
Re: Fluorescent desk lamp repair

At least thatís what my capacitor tester said. Yeah original is 2200pf

Would the smaller cap cause the light to go out and cause secondary issues?
Forum: General Electronics Technical Discussion 12-16-2021, 06:02 PM
Replies: 42
Views: 5,350
Posted By caphair
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....
Forum: General Electronics Technical Discussion 12-14-2021, 06:07 PM
Replies: 42
Views: 5,350
Posted By caphair
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...
Forum: General Electronics Technical Discussion 12-14-2021, 05:00 PM
Replies: 42
Views: 5,350
Posted By caphair
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...
Forum: General Electronics Technical Discussion 12-14-2021, 03:35 PM
Replies: 42
Views: 5,350
Posted By caphair
Re: Fluorescent desk lamp repair

Can I test if itíll light without that capacitor? Donít have another to replace
Forum: General Electronics Technical Discussion 12-14-2021, 09:56 AM
Replies: 42
Views: 5,350
Posted By caphair
Re: Fluorescent desk lamp repair

The lamp tests good. The capacitor not sure if itís 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...
Forum: General Electronics Technical Discussion 12-13-2021, 02:40 PM
Replies: 42
Views: 5,350
Posted By caphair
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...
Forum: General Electronics Technical Discussion 12-13-2021, 11:01 AM
Replies: 42
Views: 5,350
Posted By caphair
Re: Fluorescent desk lamp repair

What would cause it to be low? The tube is small and circular probably 12” give or take
Forum: General Electronics Technical Discussion 12-13-2021, 09:33 AM
Replies: 42
Views: 5,350
Posted By caphair
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?
Forum: General Electronics Technical Discussion 12-12-2021, 02:02 PM
Replies: 42
Views: 5,350
Posted By caphair
Re: Fluorescent desk lamp repair

Yes but even after replacing itís not working
Forum: General Electronics Technical Discussion 12-12-2021, 12:30 PM
Replies: 42
Views: 5,350
Posted By caphair
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...
Forum: Troubleshooting TVs and Video Sources 09-22-2021, 06:15 AM
Replies: 3
Views: 413
Posted By caphair
Re: LG 29LB4510 - Backlight on no display

Unfortunately don’t have a scope. Maybe I could borrow one. Where would I be probing with it?
Forum: Troubleshooting TVs and Video Sources 09-21-2021, 12:56 PM
Replies: 3
Views: 413
Posted By caphair
Forum: Troubleshooting TVs and Video Sources 09-20-2021, 11:34 AM
Replies: 3
Views: 413
Posted By caphair
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)...
Forum: General Electronics Technical Discussion 07-08-2021, 02:15 PM
Replies: 26
Views: 6,506
Posted By caphair
Re: Dollar store window / door alarm - Hacking question

Cool. Could these be more easily altered to keep beeping after the door closes?
Forum: General Electronics Technical Discussion 05-09-2021, 08:52 AM
Replies: 29
Views: 3,028
Posted By caphair
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...
Showing results 1 to 25 of 500

 
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