Hi,
i toasted my unifi ap lite by mistake.
then i found out there is a diode build in to prevent the cirucuit from overvoltage. i soldered out the diode and the ap is working again.
but i want to replace the burned diode and can't finde a replacement part.
can anybody help?
see attached foto for the component. thanks for any help...
cholzberger
Member
Last Activity: 01-27-2025, 12:54 PM
Joined: 09-27-2012
Location: NRW
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Unifi UC-AP-LITE recovering from 48V POE Mistake
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hey, i bridged that fuse... not the best thing to do, but it works. -
Re: Apple Cinema Display 24" (LED!)
Hey,
any progress on this issue so far?
i have the exact same problem with an 24" led acd.
Power etc. is good, but no picture and no backlight.
there must be something wrong on the lcd pcb circuits.Last edited by cholzberger; 02-22-2014, 06:48 AM. -
Hi
i have the same monitor (Hanns-g HH251) with the same issue on F102 you had in this post:
[url]https://www.badcaps.net/forum/showthread.php?t=22967[/url]
Can you tell me how you found the F102 replacement and additional details ?
Thanks in advance.https://Hi<br /> i have the same mo...ks in advance.Hi
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Re: Toshiba Regza - 42RV555D
argh sorry my fault, all are positive voltages.
but 1.6 and 3.5 Volts only, i am not really sure what to search for next?! bad transformator?Last edited by cholzberger; 10-22-2012, 03:43 PM.Leave a comment:
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Re: Toshiba Regza - 42RV555D
Nope no change when i press the button?!
But i got other (strange) readings this time
POW_PRO is at -1.6 Volts and AC_DET is at -3.5 Volts
POWER_TV also only gets -3.5 Volts this time?!
It makes no difference if i use casis or gnd pin as ground.
really weird behaviour?!Leave a comment:
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Re: Toshiba Regza - 42RV555D
Update on this one,
the powerboard has ~ -3 V on POW_PRO and ~ - 4.9V on AC_DET of the lower connector.
And there is -5 V on POWER_TV. which should turn on the main power supply i guess, but there is no other voltage comming up.
Can you give me some hin on what else should be jumpered? i attached an picture of the power board connectors but iam not really shure where to put the 3v / or i guess -3 V on this tv.
Another sympthom:
I hear a high frequent sound comming from the powerboard...Last edited by cholzberger; 10-22-2012, 07:26 AM.Leave a comment:
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Re: Toshiba Regza - 42RV555D
the screen never turns on,
standby led is on, 4.9V and 3.5 V are going to the logic board.
but there is no POW_PRO, POW_SIG... (when i press or unpress the button)
at the moment iam searching for open fuses, but everything i checkd this far looks good.
logic-board is a Toshiba - PE0649V28A000865A1Last edited by cholzberger; 10-21-2012, 02:08 PM.Leave a comment:
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Toshiba Regza - 42RV555D
Hi,
just troubleshooting this monitor,
The Power Supply is a Toshiba - PE0620 Version: V28A000841A1
i found the resistor r809 to be open.
i expect it should be at 3.7k ohm. now i wonder if this is correct.... -
Re: Medion - MD30140 - Bad Tcon Board
Thanks replacing that fuse worked perfectly, monitor is back to life.
Leave a comment:
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Re: Hans G HH251 - 3 seconds to Black
ok, i located an bad ccfl,... wonder where to buy 25" ccfls?!Leave a comment:
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Re: Acer - S231HL - Broken screen
ok, thats a point, is there a way to use the backlights of this one in another monitor? or place another screen inside this one?Leave a comment:
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Acer - S231HL - Broken screen
Hey,
i got myself an Acer "S231HL BD" with broken screen, any hints where to get an replacement screen? The Backlights seem to be ok.
I'm from germany, so a european parts supplyer would be best. -
Re: Hans G HH251 - 3 seconds to Black
Ok i replaced the Fuse, now i have another problem, the monitor stays on for a while, then goes of after a few seconds, the higher i set the brightness the shorter the time to poweroff will be.
any suggestions on this one?Leave a comment:
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Re: Hans G HH251 - 3 seconds to Black
Yes the Fuse does go to the connector cable between logic board and power supply. i guess its 5.2 V.Leave a comment:
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Re: Medion - MD30140 - Bad Tcon Board
Yeah, that fuse is open, thanks,
now i wonder what rating a fuse with a "P" on top has?
is there a table anywhere with this code to ratings conversion?Leave a comment:
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Re: Hans G HH251 - 3 seconds to Black
Ok,
both measure 530 OhmsLeave a comment:
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Re: Hans G HH251 - 3 seconds to Black
Top and Bottom of the Board attached
i dont know which are the secondarys on this transformators?...Leave a comment:
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Re: Hans G HH251 - 3 seconds to Black
nevertheless i have to replace that fuse at some point in time
and i have no idea which one to orderLeave a comment:
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Re: Hans G HH251 - 3 seconds to Black
Hey,
i bet it was me causing the fuse to blow while i was trying to fix the 3 seconds to black problem.Leave a comment:
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