Re: Suspect Bad PS Apple AcBel API 1PC36
...
Toasty
Badcaps Legend
Last Activity: 06-21-2018, 01:03 AM
Joined: 07-23-2007
Location: East Coast, USA
-
Re: Suspect Bad PS Apple AcBel API 1PC36
While you're at it, would you change the Yellow dots to something that contrasts better? Orange, purple, polka-dot...
Leave a comment:
-
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 as we buy in bulk. For onesie-twosies, there's no real difference.
Where the difference lies is in the shipping.
TLeave a comment:
-
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 graphics card, yes?
TLeave a comment:
-
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 photos from different angles of the logic board and the whole unit from the back?
TLeave a comment:
-
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.
TLeave a comment:
-
Re: Vizio VP422 random bright then dim display
*BUMP*
Anyone?
With so many TV guys on here, I figured at least a couple of clues where to start...
TLeave a comment:
-
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 it will also go a little light in contrast.
Any clues where to start are appreciated before I have to drag this off the wall again.
TLast edited by Toasty; 10-26-2017, 11:43 AM. -
Re: Recapping Antec SmartPower SP350 and SP400
Updated above post with info and datasheet.
TLeave a comment:
-
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/attach...chmentid=69689
While it -has- the fan controller on it, it's not its' only function. It does the PS_ON line and voltage Supervisor too.
One of the 2 smaller chips (IIRC...?) do the PS_ON. WT7518D
notes, notes, notes... Ah-ha!
Desolder just pin 8 (Vcc) of the 8-pin vertical chip and see if it will...Last edited by Toasty; 10-15-2017, 04:51 PM.Leave a comment:
-
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 near the outputs?
T
BTW: There is no need to quote the post above your reply. It's when you go back to a post from another page or thread that you use it.
Last edited by Toasty; 10-15-2017, 04:22 PM.Leave a comment:
-
Re: Recapping Antec SmartPower SP350 and SP400
Hello and welcome!
Let's make sure I understand what you are saying -
When you short PS_ON to ground, the supply does not come on, correct?
TLeave a comment:
-
Re: Advice on LG DVD player blown power supply
He did? Last video was just 2 weeks ago...???Leave a comment:
-
Re: Advice on LG DVD player blown power supply
Please specify the sources. I've never heard that load of crap before.
Lowest I've had them start to work is ~50-60V. Not loading it mind you, just operational.
3kW! Lucky you!
TLeave a comment:
-
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 however.
If you find yourself working on this type of equipment more often, another (safer) option is to use a variac in conjunction with an isolation transformer and fuse or 1-2A circuit breaker. There are combo units such as the RCA/VIZ Isotap which have all 3.
That setup plus the series lamp is the way I roll......Leave a comment:
-
Re: iMac 24 PSU LITEON PA-3241-02A1 250W
Why not just fix the one you have? One of the easier ones as no caps are buried under a heatsink.
TLeave a comment:
-
Re: Advice on LG DVD player blown power supply
Chokes are in -series- with power lines. For testing, you can jumper them.
Desolder them. You may find they burned off just at the base pins.
TLeave a comment:
-
Re: Advice on LG DVD player blown power supply
It's a Sanken SC6700. Again, available from China & eBay. I can't locate a valid datasheet either.
TLeave a comment:
-
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: SCK-083 = 8Ω initial resistance, 3A continuous current
TLeave a comment:
-
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.
ZD903 may have shorted, which would explain why the resistors didn't fail, but it still doesn't explain why the thermistor didn't torch.
The FET probably died because of the wrong values.
You can bypass the chokes for testing purposes.
TLast edited by Toasty; 09-27-2017, 11:25 AM.Leave a comment:
No activity results to display
Leave a comment: