Magnavox 37MD359B/F7 keeps blowing the fuse and I can't find the cause. The Mosfet 2SK3563 and the x-sistor C2120 read ok. The only diode/zener that reads shorted is D612 but when I disconnect one lead it reads fine. I couldn't find the schematic for this unit so if anyone can help me out I will greatly appreciate it. Thanx.
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Re: Magnavox 37MD359B/F7 Blown Fuse
Bridge rectifier OK?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Magnavox 37MD359B/F7 Blown Fuse
Bridge was the first I checked and I also checked the caps nearby and no shorts. I soldered the mosfet back in the ckt and I get a short between the drain and source and also across C611 which surprises me because this short wasn't there yesterday. I unsoldered the leads to mosfet and C611 and they read fine.Comment
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Re: Magnavox 37MD359B/F7 Blown Fuse
Controller IC ok? It could have been damaged by the drain gate short. (When MOSFETs short, the pins often all short together.)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Magnavox 37MD359B/F7 Blown Fuse
I finally found the cause....it was the main filter 470 mf 200 volt that was shorting out only when voltage was applied. Thanx 4 ur help Tom.Comment
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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.... -
HP Modelnumber: 14-dh0061nb
This laptop had a shorted cap on a Vcore section. After replacement is works again. But there is still a battery issue.
The battery is HT03XL and with the built-in component test from HP, in the Power section, I get an error: Logic State: Calibration required (20), Charge state: Blown Fuse (42)
I have another same battery, also with error: Logic State: Very Weak (70), Charge state: Blown Fuse (42)
And a third battery TF03XL (looks identical) with error: Logic State: OK (0), Charge state: Blown Fuse (42)
All these 3 batteries are charging... -
I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.
On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off... -
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... -
Hey,
I have a Gigabyte 980TI Windforce. No shorts on the main 8 pin PCIE power connectors. The 8 phase buck converter inductors are showing 2.5ohms.
The card doesn't power up at all - no lights, no fans, nothing. I noticed that all of the 8 phase inductors are showing 0V. I couldn't find a fuse for the 8pin power connectors.
I did notice that the PCIE x16 connector 12V line has a fuse F3 (10A marked on it) which is blown. It is reading 16ohms on one end.
1st Question: Is there some logic on the board that checks the 12V on the PCIE x16 bus connector...
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