Question about JVC Everio GZ-MG21 Camcorder

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Power failure in Jvc camcoder (dr-dv800)

I was using the dc powe supply to power my camcoder, suddenly the electric power voltage increased and the camera went off. though there was no odour of burnt device

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  • peg_806 Dec 01, 2008

    Camera was working and then suddenly not - I lent it to a friend for a few hours - he swears he didn't drop it (yeah right) but this sounds like what mine is doing. So I'm going to take it to a repair center and will post an update. I was so worried that I was going to have to buy a new camera!!!

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There are protection fuses inside the unit to protect the electronics. This is not a repair for a novice. Bring the unit to an authorized JVC repair center. The parts cost should be around $5. Add in the local repair rate for the total cost.

Dan

Posted on Apr 30, 2008

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Posted on Jan 02, 2017

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Jvc tv model av dx25,power on but no raster and sound


if you want to do it with your own, you will need a proper trouble shooting. which need the right device and tools to do the job and make sure you have at least a basic knowledge in electronic repair. the first place to be check will be the power supply section, you need to have voltage checking weather their is a secondary dc voltage from the power supply section going to the horizontal section. to turn on the other circuit and the flyback transformer. you have to know if their is a 135dc voltage at the power supply section,check at the primary capacitor using a digital tester.

Nov 28, 2012 | JVC Televison & Video

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Wht kind of current comes out?


The computer's switch mode power supply produces DC (direct current) electricity.

Nov 05, 2012 | Computers & Internet

1 Answer

Seiki


hi,the first thing to check with this kind of problem is the power supply section.this requires opening of the back cover.If you are handy with electronics you can check the voltage present at the power board by using a digital multimeter..

here's the procedure,
Use a philip screw driver to unscrew the cover.once the cover is remove,you can immediately see the power supply board .Powe supply board is where the power cord is connected(make sure to unplug the unit before proceeding)
check the fuses,set the tester to resistance or continuity test.test the fuse you must have a reading of 0000 this means that fuse is good OC means fuse is open.replace the fuse with the same type of amperage it is printed on the fuse...
If the fuse are ok,check for the voltage output of the power board.voltage are as follows,
5 volts DC supply for the mainboard
12volts DC for the audio board
24 volts DC for the screen
when all this voltages are present problem could be on tha mainboard itself and needs a replacement.

If one of the voltages fails then you need to repair the power board check and replace all bulging capacitors and open resistors.you can also replace the whole powerboard It is available online at shoppejimmy.com
good luck and let me know how it goes..

Jun 06, 2012 | Seiki SC221FS 22 Class LCD HDTV

1 Answer

Power on for a few seconds then turn off


Tv is going into x-ray protection mode. Check power supply voltage, make sure it's not too high. 160v dc across main cap, do not use chassis ground, use cap ground. If too high, something is open. If too low, something is shorted in power supply. Check voltage regulator ic.

Oct 05, 2011 | JVC AV-32D305 32" TV

1 Answer

When i turn on my jvc DVD/Cassette Recorder it says hello then turns back off after a few minutes.I opened it up and got the disc out of it but it still does the same thing


There is a small capacitor on the power supply board, if memory serves me it is 220uf cap at 16 volts or higher, increase value to 470uf with a higher voltage rating. once the part is replaced the machine will function.

Apr 16, 2011 | JVC DR-MV7S DVD Recorder/VCR

2 Answers

Loading keeps blinking Nothing works anymore. even power of no longer works


Check for dried up electrolytic capacitors on the DC-DC converter C5318, C5340, etc.

Nov 13, 2009 | JVC DR-MH30S DVD Recorder

1 Answer

I need a replacemant power supply for my printer. Where can I get one?


HP doesn't have a replacement power supply available, and to my knowledge there is no replacement power supply available.
The power supply itself would have to be rebuilt.

More than likely if it's the power supply, and not the fuse in the power supply area, (Behind the plate with the two Number 10 Torx screws. BE SURE, the printer is unplugged from power!), it's an Electrolytic Capacitor, or two that have gone bad.

Electrolytic Capacitors are Filters used in a power supply.
In the Input stage of the power supply, they filter the incoming AC electricity, before it reaches the rectifier.
In the Output stage of the power supply, they filter the rectified DC electricity into true DC electricity.

Look to see if you have any bulging, or leaking 'Caps'. You have to use the same voltage, but you can go slightly higher with the Microfarad's. (mf)

Example: I replaced two 16 volt, 330mf 'caps' with two 16 volt, 430mf 'caps'.
('Caps' = Electrolytic Capacitors)

More info to help identify bad 'Caps'.
http://www.capacitorlab.com/visible-failures/index.htm

Jul 07, 2009 | HP PSC 2210 All-In-One InkJet Printer

1 Answer

Hp computer. hard drive light is solid yellow pc non working


What has transpired is the power supply is bad. Electrolytic Capacitors inside have failed. These capacitors relate directly to the voltage power rails of the power supply. They are filters.

Little more detailed.
Your computer power supply converts AC electricity into DC electricity. (A flashlight battery is an example of stored DC electricity)
AC comes into input Electrolytic capacitors. Goes to a rectifier bridge, and on through various other components. Along the way, this DC voltage is considered 'Raw'. It needs to be a steady, 'clean', supply of DC voltage. There are Electrolytic capacitors used in the final stage, to convert the 'raw' DC to 'true' DC.

In a computer power supply the Electrolytic capacitors are the weakest link. They are usually the first component to go out.

You computer power supply converts AC voltage into three DC voltages. 3.3 volts, 5 volts, and 12 volts. These are the power rails.

When one, or more Electrolytic capacitors are weak, they make a weak voltage rail.
To simplify explaining the construction of an Electrolytic capacitor, let's just state they are small aluminum 'cans', and have a seal at one end, or both ends. Inside there is an Electrolytic paste.
This paste can break down, and when it does it forms a gas. (Hydrogen gas) This gas expands inside the 'can', pushes up on the seal/s, and makes Electrolytic paste ooze out.

So much paste loss, and the capacitor can operate in a weakened state. Too much paste loss, and the capacitor fails.

ALL the lights in your computer use less than 1 Watt. EACH fan uses 2 to 3 Watts. A harddrive just sitting there spinning, may use up to 5 Watts.

A processor uses 55 to 125 Watts! Depends on the make and model.
Since the power supply is to weak to provide enough power to turn the processor on, the harddrive isn't activated. It just sits there and spins. No Boot record on the harddrive is found, so no Operating System is going to be running. (WinXP is an example of an O/S)

This essentially means No computer! Harddrive activity light indicates yellow, then goes out. There is no harddrive activity.

No signal from the computer, because the computer isn't working.
Monitor stays in Standby, because there is no signal from the computer.
Power supply failure is 70% of computer issues.

Why?
Owner neglects to keep the inside of the computer, and the power supply clean. Doesn't use a can of compressed air for computers regularly.
Also there is another issue that the owner has nothing to do with.
Capacitor Plague.
http://en.wikipedia.org/wiki/Capacitor_plague

Solution? Replace the power supply.

I know the above info may seem like a 'Hard pill to swallow', but as stated. A weak power supply will still spin fans, and light lights.
Harddrive may spin, or spin up, then stop.

The processor isn't getting enough power.

Apr 12, 2009 | Sony VAIO Digital Studio PCV-RX540 PC...

1 Answer

Regulated dc power supply


If it is fused at 10 amps, then any power supply 8 amps or greater should be adequate.

Nov 08, 2007 | GE 35840GC3 2-Way Radio

1 Answer

FP-29 Yaesu Switching Power Supply Problem


The power supply is running, but there is a failure in the protection circuitry. Usually a shorted Zener diode or small signal transistor. The Op-Amp for the current limiter can cause the same symptom.

If the supply does this ONLY with the radio connected, there is usually one or more shorted PA transistors.

Bob W1GWU

Nov 01, 2007 | Computers & Internet

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