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Search: Posts Made By: petehall347
Forum: General Electronics Technical Discussion Yesterday, 08:43 PM
Replies: 4
Views: 70
Posted By petehall347
Re: Car Ammeter

it all sort of depends on what you you are trying to measure .like ammeters are are generally to measure charging current . ah is normally on the tag . and cranking amps .
Forum: Troubleshooting TVs and Video Sources Yesterday, 07:10 AM
Replies: 6
Views: 69
Posted By petehall347
Forum: Troubleshooting TVs and Video Sources 12-08-2019, 05:28 PM
Replies: 20
Views: 5,789
Posted By petehall347
Re: HELP replacement or equivalent of this diode T2D 83

cant tell if its black or purple

diode looks like a plain jane 4007
Forum: Troubleshooting Audio Equipment 12-07-2019, 06:18 PM
Replies: 17
Views: 247
Posted By petehall347
Re: Wireless Headphones with Hum sound?

i have a ready made one with rca connectors .like this https://images.crutchfieldonline.com/ImageHandler/trim/620/378/products/2004/127/x127SNi1-f_dg.jpeg
Forum: Troubleshooting Audio Equipment 12-07-2019, 03:46 PM
Replies: 17
Views: 247
Posted By petehall347
Re: Wireless Headphones with Hum sound?

you could try plugging the power supply into a different outlet .plus you could also try an isolation transformer on the signal inputs
Forum: Troubleshooting Power Supplies and Power Supply Design 12-05-2019, 07:27 AM
Replies: 29
Views: 392
Posted By petehall347
Re: Powering up a Car Antenna a "different" way

normally connected .normally open
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 12-04-2019, 07:05 AM
Replies: 47
Views: 631
Posted By petehall347
Re: Asus UX510U issue with 8 keys on the Keyboard

any issues with external keyboard ?
Forum: Troubleshooting Power Supplies and Power Supply Design 12-03-2019, 05:27 PM
Replies: 29
Views: 392
Posted By petehall347
Forum: Troubleshooting TVs and Video Sources 12-03-2019, 05:24 PM
Replies: 4
Views: 141
Posted By petehall347
Re: LG Korean message

https://imgur.com/5H5M09G
Forum: General Electronics Technical Discussion 12-01-2019, 06:18 PM
Replies: 33
Views: 499
Posted By petehall347
Re: Charger circuit questions

how does the led operate ? like is it red then green or ?
Forum: Troubleshooting Power Supplies and Power Supply Design 12-01-2019, 05:01 PM
Replies: 41
Views: 365
Posted By petehall347
Re: Wine Enthusiast wine cooler, no power. Model # 272 03 29

replace fuse and also now check rectifier diodes in case one went shorted after the spark .
Forum: Troubleshooting Power Supplies and Power Supply Design 12-01-2019, 02:24 PM
Replies: 41
Views: 365
Posted By petehall347
Re: Wine Enthusiast wine cooler, no power. Model # 272 03 29

meter is set for dc volts .you said you were measuring ac volts . you really want to be measuring the dc volts at the large capacitor . or dc out on rectifier which is same thing .
Forum: Troubleshooting Power Supplies and Power Supply Design 12-01-2019, 01:47 PM
Replies: 41
Views: 365
Posted By petehall347
Re: Wine Enthusiast wine cooler, no power. Model # 272 03 29

test your meter with known good voltage source such as a cell battery .
Forum: Troubleshooting Power Supplies and Power Supply Design 12-01-2019, 10:44 AM
Replies: 41
Views: 365
Posted By petehall347
Re: Wine Enthusiast wine cooler, no power. Model # 272 03 29

your meter is set up wrong .no wonder there was sparking .put red into volt ohms .black to common .
p.s fuse in the meter might be blown now plus maybe more damage to it .
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 12-01-2019, 09:25 AM
Replies: 47
Views: 631
Posted By petehall347
Re: Asus UX510U issue with 8 keys on the Keyboard

those keys may well be grouped together . if so the common connection is suspect .
Forum: Troubleshooting TVs and Video Sources 11-30-2019, 05:44 PM
Replies: 10
Views: 104
Posted By petehall347
Re: Sony KLV-46W400A Power Ok, Blank Screen. How to test T-Con board?

check voltage both sides of fp1 . i have had fuses test good and be bad .
Forum: Troubleshooting TVs and Video Sources 11-29-2019, 04:33 PM
Replies: 1
Views: 50
Posted By petehall347
Re: TCL 65S401 Replacement LCD

will likely cost same as new set
Forum: Troubleshooting Power Supplies and Power Supply Design 11-28-2019, 06:29 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

am thinking i could use this . all i need to do is transfer the led part and wire the charger to original box . https://www.ebay.co.uk/itm/Workzone-Charger-For-18volt-li-ion-Cordless-Batteries-
Forum: Troubleshooting Power Supplies and Power Supply Design 11-28-2019, 06:10 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

nothing available at all .
i did think like i mentioned earlier to get a plug in supply and wire to charging terminals . just need to know the right one to get . original is 18v 1500ma . i guess it...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-28-2019, 12:16 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

nice one thanks . will update as to what happens when i have the parts and fitted them . might take a while as have to go away soon .
Forum: Troubleshooting Power Supplies and Power Supply Design 11-28-2019, 05:06 AM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

thanks for the info .
i am not too good at following the calculations . what value resistors would get me in the ballpark ?
Forum: Troubleshooting Power Supplies and Power Supply Design 11-27-2019, 04:11 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

i cant even find any schematics with values on the resistors . most schematics i have looked at dont even have the diode and resistor in series . what is the purpose of them i wonder ?
Forum: Troubleshooting Power Supplies and Power Supply Design 11-27-2019, 03:29 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

looks like same as R27 on this schematic ....page 17
Forum: Troubleshooting Power Supplies and Power Supply Design 11-27-2019, 03:08 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

ok R4 connects from IC to gate so must be gate resistor .
it also connects to R5 and R11 .
D7 also connects to ic same pin then to R5 then to gate
so need to now know correct value for R5 as...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-27-2019, 02:29 PM
Replies: 34
Views: 272
Posted By petehall347
Re: need some help with resistor values

i thought 470 too . think its across D7 will check later
Showing results 1 to 25 of 500

 
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