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Sansui 3618 tv

I have a sansui model 3618 with a blown fuse to the power supply but it blew so well i can read the marking can you tell me wich fuse to get it has t3.15al 250v writen on the board

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That seems to be a 3.15amp fuse. if it blolws then there is a short circuit

Posted on Mar 10, 2008

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TV comes on and then immediately goes off


It is called shutdown--set detects something wrong etc:

I see so many here with no sound/no picture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signs of damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down the problem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the generic ones like Radio Shack). Many fuses are special even aside from amperage--Don't put a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses a standby power supply that runs 7/24 and a main supply (some are combined and some not.

Here aside from checking fuses you want to examine all the filter caps on the power/standby to see if any are puffed up or buldged up in some fashion--I attach a photo of a good one---top should be silver metal and PERFECTLY flat and have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating (saves money) which causes them to fail in a year or two---the standby runs 7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over. If set is opened at least look for puffed up and bad caps like in this photo. 11_1_2012_12_27_00_am.jpg If its a 12 volt set using its own power supply that may be bad but you should be able to try it either with a seperate supply or direct to 12 volts.

Oct 31, 2012 | Jensen 12V LED TV, 32"

1 Answer

The fuse of my Akira 14'' tv got burnt. i want to know if it might have destroyed any other ic in the tv set.


Hi ,

This is an indication that you have a short on the power supply section.It can't be fixed by replacing the fuse alone. Short usually near the AC line where parts like the following are present.

  1. Power Cord - even very low of chances but still to be check.
  2. Posistor and degaussing - even very low of chances but still to be check.
  3. Rectifier diode
  4. Main filter electrolytic capacitor
  5. Voltage regulator I.C.

This is the common parts that might be shorted and made the fuse blew. #2-5 is quite technical and need an expert to do the job so I've advice you to look for a qualified technician to isolate the problem. You may visit the link http://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info.
Check also if your unit is under warranty, avail it because the manufacturer will fix it for free or a little charge only.


Hope it may help you.
Have a nice day!

Feb 16, 2011 | Portable Televisions

1 Answer

Have unplugged and moved the tv and now can't turn it on


Hi,


You may have a blown fuse. First unplug the TV and take the back off of it and then look for a tube shaped glass with two metal ends. Take it out and visually inspect it, if it looks burnt on the inside then you have a blown fuse if it does not look burnt, take a multimeter set to resistance and measure the resistance between the two metal ends (put the leads of the meter on the metal ends, black on one and red on the other) you should read 0 ohms...any other reading is bad. Now if the fuse is bad buy replacement fuses from your local electronics parts store or from Radio Shack. Replace the fuse and see if this solves your problem. Plug the set back in and if the set powers up and remains up unplug the set again put the back on again and you are finished.

Please get back to us if you have any further query or else accept the solution.

Thanks for contacting fixya.com

Nov 01, 2010 | Portable Televisions

1 Answer

Our power went out and ever since then, the television won't work. It was on a surge protector, but the tv repair man that I consulted said those are over-rated. Please help!!


Many devices marketed as surge suppressors are actually 'temporary power taps'.

The rear of the surge protector unit should show the UL-rating of the device. If it's listed as a UL-TVSS, that's a surge suppressor. If it says 'Temporary power tap' then the only surge suppression may be a resettable circuit breaker, through which lightning could pass unchecked.

Most likely the TV power supply has failed, and the cost/complexity of the replacement all depends on the local repair shop. Modern LCD-TV power supplies are typically a $200 part, plus a similar cost for labor. If it simply blew an internal fuse, an honest shop would fix it for under $100, I would guess.

With respect to surge suppressors, the leader in this field is APC (amercian power conversion) and several other good brands are TrippLite and Panamax. These devices are not dirt cheap, but you get what you pay for.

Oct 21, 2009 | Portable Televisions

1 Answer

T.V blew Out after power surge


Once you have the back off the TV...look to see if there is a board mount fuse that can be replaced

Apr 07, 2009 | Portable Televisions

1 Answer

Tv runs on 110 but not 12volt


There is a fuse on the DC power line for AC/DC sets and you can start by making sure it isn't blown. The fuse may be in the cigarette lighter plug itself, or inside the TV. If you find the fuse blown, replace it with one of the same value and try it again. The fuses sometimes do go for no good reason. If there is some internal trouble with the TV, the fuse will go again and you'll know for sure.

Nov 30, 2008 | Supersonic FC2245 13 Color TV/DVD Combo...

1 Answer

No picture or sound on tv


This sounds like a power supply problem. Check for a blown fuse in the unit. If there is no blown fuse then the power supply might have a shorted or open component in it. Check for the blown fuse first if the fuse is not blown or it can not be fixed by changing the fuse then the next culprit is the power supply, you will have to have a qualified TV technician do this.

I hope this helps
Thank you
shuttle83

Jul 17, 2008 | GPX KCL8806DT 7 in. Portable Television

1 Answer

Tv Is not respondind


This denotes a problem with the power supply either the low voltage power supply of the high voltage power supply. You will need the following documents and equipment if you plan on doing this yourself: 1) a schematic diagram 2) a Multimeter 3) an oscilloscope 4) a signal generator (color bar, cross hatch, and purity) The schematic will let you know where the test points are and the level of voltage and signal are supposed o be at the test point. The multimeter will allow you to trace and measure DC and AC voltages throughout the set. The oscilloscope will allow you to view the waveforms generated by the signal generator, this is needed to tell if a component is not processing the signal in the proper fashion. The signal generator creates a standard reference to measure by. Since this prolem is in the power supply section you should determine if the problem is a blown fuse by visually inspecting the fuse. Than you will need to determine if the problem is in the high voltage power supply. You do this by checking the transistors in the horizontal section of the TV. you will find the problem either in the low or high voltage power supplies.

Oct 01, 2007 | Portable Televisions

1 Answer

It would not power up


You should open the TV and look for a blown fuse near where the power cable enters the set. A lot of times you can buy replacement fuses at a local electronic or hardware store and they're easy to replace. Check the fuse. If it is blown, it will be obvious and make sure that the set is unplugged before replacing it. If it blows again, or if it is not blown, your problem is probably in the 'X' volt regulator and you will need professional help with the repairs. You can also check the board where the components are mounted and resoled any that look bad. Brief power outages may cause the TV to turn off on its own. If you are using a surge protector, try connecting the set directly to the wall outlet. In your case it could caused by a blown fuse, a leaky diodes or a bad solder joint at the horizontal drive transformer. All can be replaced at a local electronic or hardware store and they're easy to replace If this does not correct the problem, you may need to have your TV serviced or buy a new one. good luck!

Jan 19, 2006 | Sony KV-9PT60 9 in. Portable Television

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