Like the title says looking for advice on where to start test for a short or other problems. Already made sure it is correct fuse replacement just looking on where to go from there!
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Re: 40pfl4901f7 b Phillips t.v fuse blows instantly!
Check for shorted power diodes and FETS. Also google for a service manual.
You should also be able to measure the short from the fuse to gnd with your ohmmeter.Last edited by neilc6; 05-01-2020, 12:10 AM. -
Re: 40pfl4901f7 b Phillips t.v fuse blows instantly!
Here are photos of the power supply.Attached FilesComment
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Re: 40pfl4901f7 b Phillips t.v fuse blows instantly!
Can you post a picture of the underside of the power supply.
There's a repair kit on ebay. Check the components shown with the components on your power supply.
https://www.ebay.co.uk/c/16017228550Last edited by dick_barton; 05-01-2020, 02:31 AM.Willing to help but I'm no expert.Comment
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Re: 40pfl4901f7 b Phillips t.v fuse blows instantly!
Check the resistance across the Varistor SA601, if there is no short, check each of the 4 diodes D601~D604Comment
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Hi, I'll start by saying that I'm not an expert and I've reached a point where I don't know what to try/do anymore...
Starting from the beginning: I opened this subwoofer for the first time with a very strong smell of burnt electrical components, I realize that on the amplifier board there is a hole between V+ OUT and GND about the size of a finger, the damaged components were the shorted mosfets, two damaged zener diodes and two capacitors. I bought everything, I fixed the hole by cutting the pcb and putting a piece of a perforated board.
I had no problems connecting mosfets and capacitors,...08-27-2024, 12:46 PM -
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... -
I could have sworn I posted about this before, but I can't seem to find the post..
To whit..
I have a 60LN5400 that came in.. Backlights work fine.. No display..
Traced the problem to the TCON board.. Blown fuse..
Replaced the fuse.. Blows again.. Replaced the fuse again... This time it fries the marked part on the Main Video board...
Got a new Main Video Board.. Replaced the fuse on the TCON..
The fuse is fine and the backlights come on fine if I don't have the cellophane connectors from the TCON to the... -
Hi all,
Need some advice to troubleshoot this TV.
PSU blow the main fuse F100, 3.15A.
I replace the fuse with another 3A (but not ceramic) and blows it again after few seconds when i plugged in to the wall, with nothing connected to PSU, just the power cord.
I checked with DMM for dead sorts but didn't found any.
Checked bridge rectifier and seems ok.
Also check main filter cap with transistor / cap / esr tester (the usual cheap transistor testers from ebay) and found ok.
PSU p/n is EAX64405901 (1.6)... -
Hello everyone. 😀
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs...
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