Question about Audio Players & Recorders

Open Question

I have a TEAC LE2280FHD TV with a power failure in +12V and need a circuit

The 12V regulator has burnt out and I cannot identify what the chip was. The AS7805D and the BM1084ADJ seem O.k. If I had the circuit or one that is similar I might be able to make a substitute.

Posted by on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Slinteriors
  • 8617 Answers

SOURCE: power supply regulator for rca 52" home theatre twin tuner pip

no parts from a pioneer wont work. There are roughly 4 regulators for the power supply maybe 5. The sad thing is they cost between 7 and 20.00 , he didnt happen to mention which power supply was affected did he? You would have to check the various regulators out of circuit to determine which one is bad. If its a F.E.T they are hard to check without the proper equipment.

Posted on Apr 05, 2008

  • 1 Answer

SOURCE: Need schematic diagram, some advice and ultimately replacement parts

You have something in short circuit in power supply pattern, so filter coils are burnt. It may be voltage regulator, or regulating transistor, electrolytic capacitor or even shorted diode at pwr. input serving to protect in case of inverse polarity applied. Check all for short. Was it reverse polarity or overvoltage occured?

Mladen,
mladen@propilots.net

Posted on Mar 14, 2009

jose_v17
  • 227 Answers

SOURCE: Motherboard broken chip

There is a few of the motherboards that fit your model on the net I saw one for 99 bucks on ebay. You could always use that as a contingency plan. I agree you are halfway there you might as well complete it.

Posted on Mar 25, 2009

  • 15 Answers

SOURCE: Burnt ic chip on Korg microKorg pcb.

Hi Mate, I have the exact same problem, casued by wrong adaptor being connected by accident, did you manage to find what the code is on the IC5 chip ?, I can see NSV, but there is another letter or number before it but cant make it out as that where its burnt.

Posted on Jun 02, 2009

  • 1 Answer

SOURCE: Polaroid DRA-01601A Power Supply Failure

I
I have repair my supply board by replace the 2 capacitors and 1
mosfet because the 5VDC was failure
the mosfet is a IRFP 150 or similar and capacitors are same models
becarefull the 330ohms resistor dont touch the capacitor
or a great risk of short circuit destroy the 5VDC
best regards
jean yves kerfers
olivet
france

Posted on Jan 11, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I have a teac dle3289hd digital TV with no power to unit


Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Jun 17, 2015 | Teac Audio Players & Recorders

3 Answers

Why won't my Toshiba 35 in TV turn on?


The problem could be an open fuse or power supply failure.

Mar 22, 2015 | Toshiba Televison & Video

1 Answer

My TEAC LED TV LE 4087FHD turns on intermittently.I need to turn power off and on several times for the tv to switch on. Any suggestions?


Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
SMPS start voltage problem. Check all the reisistors; that supply the initial voltage to SMPS control section; at switch ON. Contact any service technician.

Nov 30, 2014 | Teac Televison & Video

1 Answer

Burnt smell


Check the main power supply regulator section for faulty component/s. The sound you heard might be of a bursted electrolytic capacitor at the power regulation stage circuit, due to some spikes in the input AC voltage. Open the TV and check this section. Be sure to unplug the TV from AC mains wall socket, before open it.

Jul 23, 2012 | Zenith B36A24Z 36" TV

1 Answer

No 12v to peripheral input devices (USB, mouse, kybd), p4m800pro


Oh, pick me, pick me. I know. (Lol!)

1) Chip and Chipset are slang terms for I.C.
Integrated Circuit,

http://en.wikipedia.org/wiki/Integrated_circuit

2) The Southbridge chip of the motherboard chipset, handles the USB bus, and PCI bus.

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg

The Low Pin Count Bus goes from the Southbridge chip, to the Super I/O chip.
The Super I/O chip handles the Keyboard and Mouse.

http://www.ecsusa.com/ECSWebSite/Product/Product_Detail.aspx?DetailID=673&CategoryID=1&DetailName=Feature&MenuID=16&LanID=9

The motherboard chipset for the ECS P4M800 Pro-M is a
VIA P4M800 - Northbridge chip, and a
VIA VT8237R+ - Southbridge chip.

http://en.wikipedia.org/wiki/List_of_VIA_chipsets#AMD_.2F_Intel_processors

[The Northbridge chip is under that aluminum finned Heatsink, close to the Processor.
The Southbridge chip is to the right of the white long PCI slots.
Green square circuit board, with VIA in the middle of a silvery circle ]

Does the VIA southbridge chip looked burned, or bubbled?

http://en.wikipedia.org/wiki/Super_I/O

Which one is the Super I/O chip? Don't know. I think it may be that ITE chip to the left of the VIA southbridge chip. (VT8237R+)

http://web.archive.org/web/20070929033214/http://www.esupport.com/techsupport/award/superio.htm

Does it look burned, or bubbled?

Look at the Electrolytic Capacitors on the motherboard.
(Radial Aluminum Electrolytic Capacitors, to be more specific)

Some of these are used in the motherboard voltage regulator circuit.
SOME are for regulating voltage for the I/O bus, and USB bus.

(No, not referring to the solid Polymer capacitors surrounding the Processor socket)

1) http://www.hardwaresecrets.com/article/616

2) http://www.hardwaresecrets.com/article/How-to-Identify-Japanese-Electrolytic-Capacitors/595

3) http://www.youtube.com/watch?v=YCSNWi3UHf4

4) http://www.mouser.com/Passive-Components/Capacitors/Aluminum-Electrolytic-Capacitors/Aluminum-Electrolytic-Capacitors-Leaded/_/N-75hqw/

Look for other burned SMD's on the motherboard.

Regards,
joecoolvette

Jul 20, 2012 | EliteGroup P4M800PRO-M Motherboard

1 Answer

The Panasonic cordless phone that I had a negative 12v power supply. I accidently applied a positive power and found fumes from the equipment. I opened to see that the IC which could be the rectifier...


First of all you must understand the power interface circuit.Mainly it has two line filter coils at very much start after the DC in socket, they usually get burnet when connected to the reverse supply rail, if you have these filter coils replace them first, if do not have, just bypass them.After these coils, rectifier IC can be found, it is rectangular in shape, has four connections, looks like an SMD IC, about 5 mm at lenght , 3 mm at width, this can simply be replaced with four diodes in bridge configuration.You can easily identify its pins configuration by tracing the tracks. The connections going to the DC socket are input and interchangeable, the other side tracks are connected to the regulation section and can be identified with an electrolytic capacitor fixed directly to the connections of rectifier.The polarity identification is directly read from the capacitors polarity.Check upto this stage & email me after testing the power interface section with the model number.

Aug 08, 2008 | Panasonic Lands Phones

1 Answer

Need schematic diagram, some advice and ultimately replacement parts


You have something in short circuit in power supply pattern, so filter coils are burnt. It may be voltage regulator, or regulating transistor, electrolytic capacitor or even shorted diode at pwr. input serving to protect in case of inverse polarity applied. Check all for short. Was it reverse polarity or overvoltage occured?

Mladen,
mladen@propilots.net

Mar 18, 2008 | Lowrance GPS

1 Answer

Kenwood kvt 715dvd


I have seen problems in the hideaway (brain) where 8v reg circuit fails causing higher voltage(12v to 14v) to be on that 8v line. First component to fail is the Tuner followed by electronic volume ic. I have probably seen 6-8 failures where tuner fails. Fix is to replace tuner and replace open chip resistor in Hideaway box to restore 8v regulator to proper voltage. kstahl65@att.net

Feb 24, 2008 | Kenwood KVT-715DVD Car DVD Player

1 Answer

No power no picture no sound


You have a shorted power component. Probably either the voltage regulator or the Horiz. output transistor. Both will be mounted to a heat siink of some type. The Horiz. power circuits along with the flyback transformer power up 90% of most TV sets.

Geno

Feb 16, 2008 | Televison & Video

1 Answer

Compaq tft 5005


Did the same and burnt a frazzled chip. it is on the 3rd circuit board (I believe it provides the lamp power). It is the 8 pin surface mount chip next to C900. As far as I can make out, the numbers on the chip are 4559 **** **7B I was told it's the lamp drive. If it is indeed lamp drive, then when you turn the monitor on, round the edges of a flashlight pressed to the screen, you should see a picture. If there isn't one, you may have killed more than I did. Is there no power regulator at the input? Good luck

May 18, 2006 | Compaq TFT5000 15" LCD Monitor

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

21 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

5020 Answers

The Knight
The Knight

Level 3 Expert

73740 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...