Forum: Troubleshooting Power Supplies and Power Supply Design
12-15-2017, 03:24 PM
|
|
Replies: 151
Views: 39,244
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
12-13-2017, 10:48 PM
|
|
Replies: 151
Views: 39,244
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
11-26-2017, 11:52 AM
|
|
Replies: 123
Views: 51,378
Re: Power Mac G4 MDD "Mirror-Door" won't power up
It all comes down to which supplier has what caps in stock. The price per unit is typically very close if not exactly the same. The quantity discounts are where myself and others make our decisions...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
11-10-2017, 08:18 AM
|
|
Replies: 146
Views: 52,044
Re: iMac 24 PSU LITEON PA-3241-02A1 250W
You said: "initially this imac has an issue on graphic card "
Was the graphic card replaced?
You might have to do that. Especially if it overheated.
These problems started with the...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
11-08-2017, 11:28 AM
|
|
Replies: 146
Views: 52,044
Re: iMac 24 PSU LITEON PA-3241-02A1 250W
If the cover is on or off will make no difference. It will work.
What is the Apple model number of the iMac?
Here: https://everymac.com/ultimate-mac-lookup/
Can you provide some clear...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-31-2017, 05:35 AM
|
|
Replies: 146
Views: 52,044
Re: iMac 24 PSU LITEON PA-3241-02A1 250W
Being inexperienced, I would replace the power supply. Because of the smoke you saw, don't even bother attempting to fix it.
The other technician apparently screwed something up.
T
|
|
Forum: Troubleshooting TVs and Video Sources
10-29-2017, 02:51 PM
|
|
Replies: 1
Views: 859
|
|
Forum: Troubleshooting TVs and Video Sources
10-26-2017, 11:42 AM
|
|
Replies: 1
Views: 859
Vizio VP422 random bright then dim display
Customer's wall mounted TV. Repaired 10 months ago for bad PSU caps except for mains cap.
Recently it began going from normal brightness to a bit dim then back. Cycles several times a minute and...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-15-2017, 04:52 PM
|
|
Replies: 65
Views: 24,090
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-15-2017, 04:27 PM
|
|
Replies: 65
Views: 24,090
Re: Recapping Antec SmartPower SP350 and SP400
Picture from this thread:
https://www.badcaps.net/forum/showthread.php?t=31149
Picture: https://www.badcaps.net/forum/attachment.php?attachmentid=69689
While it -has- the fan controller...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-15-2017, 04:15 PM
|
|
Replies: 65
Views: 24,090
Re: Recapping Antec SmartPower SP350 and SP400
No diagrams that I've seen. Only what some folks have drawn out.
I suspect you have an issue with the start circuit.
Too long since I had mine open. Does that have the little vertical board...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-15-2017, 10:44 AM
|
|
Replies: 65
Views: 24,090
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-06-2017, 01:47 PM
|
|
Replies: 40
Views: 4,538
Re: Advice on LG DVD player blown power supply
I disagree with using halogens for testing. Because of the lower cold resistance, too much current can pass, effectively defeating the series bulb's purpose.
They're good for load testing...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
10-03-2017, 10:22 AM
|
|
Replies: 146
Views: 52,044
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
09-27-2017, 11:53 AM
|
|
Replies: 40
Views: 4,538
Re: Advice on LG DVD player blown power supply
>>Probably headroom for inrush currents.<<
Correct. The thermistor limits the initial surge. It is -rated- at 4A continuous.
SCK-054 = 5Ω initial resistance, 4A continuous current
Ex: ...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
09-27-2017, 11:24 AM
|
|
Replies: 40
Views: 4,538
Re: Advice on LG DVD player blown power supply
The damage there looks to be from the bridge rectifier shorting. The thermistor/inrush current limiter TH901 didn't blow, nor did the 2 - 0.15Ω source resistors which effectively present 0.075Ω.
...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
09-27-2017, 08:41 AM
|
|
Replies: 6
Views: 2,051
Re: Hp pavilion dv6 with no power
Elektrotanya.com (https://elektrotanya.com)
HP PAVILION DV6 DV7 QUANTA UT12 REV 1A SCH (https://elektrotanya.com/hp_pavilion_dv6_dv7_quanta_ut12_rev_1a_sch.pdf/download.html)
Attached PDF is...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
09-26-2017, 03:35 PM
|
|
Replies: 40
Views: 4,538
Re: Advice on LG DVD player blown power supply
>>at most, it should shut down to protect itself<<
Unless that part of the circuit is faulty also.
Don't know your experience level so, sorry, I had to ask the question about the mains cap. :D...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
09-26-2017, 03:10 PM
|
|
Replies: 6
Views: 2,051
Re: Hp pavilion dv6 with no power
Is it an HP charger or a knock-off?
I've seen knock-offs burn up the laptop charger circuits.
If it's an HP, the wiring from the charger may be faulty. Usually at the plug end. There is a...
|
|
Forum: Troubleshooting Power Supplies and Power Supply Design
09-26-2017, 01:23 PM
|
|
Replies: 40
Views: 4,538
Re: Advice on LG DVD player blown power supply
It is odd to see the input filter chokes burn like that. They are replaceable.
The mains filter cap was likely the original failure that took out the FETs. I hope you replaced it with a correct...
|
