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-   -   Power Supply 2273+3362 PSU in STBY (https://www.badcaps.net/forum/showthread.php?t=96497)

rigeback 06-09-2021 05:38 AM

Power Supply 2273+3362 PSU in STBY
 
2 Attachment(s)
Got a PSU that I can't seem to find a manual for "Power Supply 2273+3362".

5V and 12V is present and I PS/On bridged turned on the backlights although the led were flickering and could be culprit as the monitor has been idle for some time.

D2 Diode has 12V on both sides which seems a bit strange?

SMDFlea 06-09-2021 06:06 AM

Re: PSU in STBY
 
C910 and R901 solder joints look a little suspect. If you have an ESR meter check all the electrolytics

re-atari 06-09-2021 08:55 AM

Re: Power Supply 2273+3362 PSU in STBY
 
As do both solder joints on R930.

rigeback 06-09-2021 09:34 AM

Re: PSU in STBY
 
Quote:

Originally Posted by SMDFlea (Post 1051280)
C910 and R901 solder joints look a little suspect. If you have an ESR meter check all the electrolytics

I don't have an ESR meter but I already changed out 3 caps that were swollen, I think the problem is in the low voltage switching or the led

R_J 06-09-2021 09:58 AM

Re: Power Supply 2273+3362 PSU in STBY
 
If D2 voltage is 12v on both sides it because the led boost circuit is not working, likely cause is an open led in the backlight circuit. If the backlight is open, the circuit will go into over voltage protection and shut down.

rigeback 06-10-2021 03:16 AM

Re: Power Supply 2273+3362 PSU in STBY
 
Quote:

Originally Posted by R_J (Post 1051341)
If D2 voltage is 12v on both sides it because the led boost circuit is not working, likely cause is an open led in the backlight circuit. If the backlight is open, the circuit will go into over voltage protection and shut down.

Correct, bridging PS/ON indicates a power loss when the led strip is connected and will put the rest of the system in protection.

I've removed the led strip and will consider ordering it.

Thanks you all for the input.


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