Hi, monitor did not light up backlight. I replace caps on it and i have 1-2 sec backlight and then secondary fuse blown. can you help me
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Re: Sync Master 940n fuse
that mosfet on the heatsink might be bad. get the number off the mosfet. you might have other problems as well. -
Re: Sync Master 940n fuse
it is MBFR20100CT i check it with diode test and OK...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
test the mosfets on the other heatsinkComment
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Re: Sync Master 940n fuse
Check you put the caps in the right way round?Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Sync Master 940n fuse
other one is DMO565R it has a 6 leg. CAnnot find datasheet...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
caps is in the right way...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
is this readig ok on CCFL transformer i have shorted all primaryAttached Files...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
Not that one (which sounds like FSDM0565RB switched mode PWM power I.C)...
Check the attached image. Remove the MOSFETs (as highlighted in yellow) and measure them off the board. These are surface mount MOSFETs. Also a reading of 1.3kOhm is little high for the transformer secondary windings (usually around 1.1kOhm or less). Possible bad transformer...
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Re: Sync Master 940n fuse
very nice added graphics in your post #8 image.. which program do you use?
Also follow Budm posts, he links always a method to test for bad ccfl using unusable broken low-consumption cfl lamps.Comment
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Re: Sync Master 940n fuse
@ Davi.p - program is 'Jing' and its a free screen capture tool, i use it all the time
You ment sticky thread?...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
that 2 MOSFETs is a 4502C how can i test them? In datasheet i can understand where is the D,G,S...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
i check them, and i this i found a fail
one og them is shorten on pin2 and pin 7, other is 71kOHM and thay are the same markings (4502C AA6PN)Attached Files...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
ok let us to know if you fix it when you will change it.Comment
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Re: Sync Master 940n fuse
ok, i will order it and feedback when arives...the quieter you become the more you are able to hear...Comment
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Re: Sync Master 940n fuse
According to the service manual, supposed to be AM4512C but it seems the manufacturer were using AM4502C on your unit...
Yups, that would have possibly cause the fuse to blow. You may want to replace both of them (with new ones) just in case. As for the 2 seconds to black, check the secondaries of the second transformer and see if they are the same as the first transformer. As mentioned earlier, 1.3kOhm sounds a little high...
Last edited by lexwalker; 02-02-2014, 01:24 AM.Comment
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Re: Sync Master 940n fuse
i replace 2 MOSFET and monitor is now working, thank you all....the quieter you become the more you are able to hear...Comment
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Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping... -
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TE Circuit Protection also offers the telecom FT600 fuse for telecommunications applications. This telecom fuse helps comply with North American overcurrent protection requirements, including Telcordia, GR-1089,...10-07-2024, 06:07 AM -
Hi I wonder if anyone might be able to steer me in the right direction. I have this Samsung UE46ES8000 TV and it went bang during use. The main fuse on the PSU board is open. I've checked every diode/mosfet/transistor I can see and nothing appears to be short to cause the fuse to go. The DC output of the bridge rectifier is not short either. I've seen online that some of these models are known for having their PFC mosfet or other mosfets shorting and blowing the fuse but i'm not seeing that here. If anyone aware of these models having any issues to cause this? I'm reluctant to just replace the... -
Hi guys,
I'm inexperienced with electronics repairs, I've done a little bit of soldering caps and whatnot, but i have a blown fuse on this mimaki printer I got which I have bought a replacement for.
How do I remove this type of fuse (see picture)...it kinda looks like it would pull out of that bracket but it didn't come at first pull and I didn't want to brute force it incase it's soldered on there like most of the rest of the components.
Anybody know how to remove this type of fuse?
(The fuse is toward the bottom of the image labeled F2)... -
I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.
Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in....
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