Question about Sylvania 6626LCT 26 in. LCD Television

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Fuse Blowing My wife's cat has chewed a few light slits on the power cord and it no longer works. I opened the tv and noticed that the fuse that is next to the power cord wires was blown. I bought a pack of fuses and replaced one thinking that maybe the fuse was just bad. When I pluged the unit back in the fuse blew again. Is this a problem with the cord or may there be something internal that went wrong? Also, if it is the cord is it possible to just open the cord, re-attach bad wires (if necessary) and tape the cord back up? My warranty won't cover this and people seem to want a lot to repair this problem.

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  • Lindy Shifflet Jun 03, 2007

    So, if I understand you correctly this is an inside problem with the set and not the cord? Yet, something that should be covered with a warranty (that I have)? I appreciate the news. Thanks

  • amyz Feb 10, 2008

    set is about a year old. was working fine last night, but this morning would not turn on, either on the set or via the remote. We took the back off and saw that the fuse was blown by the power cord. Replaced it and that one blew as well. we're likely taking it to the repair shop now, but would appreciate any ideas re: what might be making the fuse keep blowing.

  • rkauffman1 Sep 01, 2008

    My Sylvania is about 2 years old and was working one night and then the next morning would not turn on. I looked on the web site to find a solution and others had replaced the fuse, but to no avail so I thought I would give it a try as well. Same result. The second I plugged in the power cord there was a flash from the rear of the set where the fuse resides and I had not even hit the power switch on yet. Anyone know a goodrepair person in South Jersey for these things??

    RAK

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For the fuse to blow it must be receiving power,this places the fault beyond the fuse,without knowing what type of tv we are dealing with i can only assume a short circuit on the power supply board.

Posted on Mar 04, 2013

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A blown fuse is usually caused by a shorted regulator or a bridge rectifier circuit. Either way it is a problem in the primary power supply. A bad cord won't blow the fuse in the set, it will blow a circuit breaker in the house. A servicer usually would normally cover the inside of the set with a "few light slits in the AC cord". Hope this helps

Posted on Jun 03, 2007

  • Mike DeNiro Jun 03, 2007

    Yes, you do understand. It is an internal problem.

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2 Answers

Amp keeps blowing fuses


Blowing fuses, was caused by many thing.
Short of rectifier,resistor,elco,tube heater,tube pin, and also trafo itself (primary or secondary winding). It must check step by step.
CAUTION :
THIS IS HIGH VOLTAGE AREA.
RISK OF ELECTRIC SHOCK THAT CAN KILL.
DON'T DO THIS IF YOU ARE NOT TECHNICIAN OR NOT FAMILIAR WITH VACUM TUBE CIRCUIT. THE CIRCUIT MAY STILL CONTAINS ELECTRIC SHOCK EVEN IF IF THE AMP IS NOT POWER PLUGGED.


The simple steps (see picture) are:
  1. Disconnect all connection from secondary of power trafo (PLV,PDCH,PACH and PHV).
    Power ON the amp. If fuse is not blowing,trafo is good.
  2. Power OFF the amp. Unplug the cord.
    Connect PLV1-PLV2-PLV3 (this are Bias voltage,+/-15VDC and Backlight PCB voltage) to power trafo.Power ON the amp. If fuse is not blowing,PLV circuit is good.If fuse blowing,there are parts is damage (dioda,elco,7815/7915,resistor) in this PLV circuit.
  3. If step 2 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV circuit stay connected,connect PDCH 1-2 and PACH 1-2 to power trafo. Power ON the amp.
    If fuse is not blowing,PDCH and PACH circuit is good and all tubes heater/filaments are lights after a few seconds.
    If fuse blowing,there are parts is damage (dioda,elco,tube heater pins) in this PDCH/PACH circuit.
  4. If step 3 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV,PDCH,PACH circuit stay connected,connect PHV 1-2 to power trafo.
    Power ON the amp. CAUTION: HIGH VOLTAGE AREA is ON.
    If fuse is not blowing,PHV circuit is good.
    If fuse blowing,there are parts is damage (dioda,elco,tube pins) in this PHV circuit.
.amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-0.jpg
Notes:
  • Steps had to be done sequentially from 1 to 4, not upside down.
  • If tube/heater pin is short,it can't be repair. The tube must be replacing.
  • PDCH circuit is voltage for V1-2-3-4 heater/filaments.
  • PACH circuit is voltage for V5-6-7 heater/filaments.
  • Always replace fuse with same type.

amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-1.jpg

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To which circuit section did you replaced the fuse? Main power retulator? Just understand, the fuses are used to protect the circuit and TV from any short circuit or over voltage. Without any one of these, no fuse will blow up. If it was due to over voltage, the set should work after a fuse replacement. But here, the fuse blow up again, means, there is some thing shorted component/s. Check which component is shorted, and replace it, before replacing an other fuse. One more thing to say is, never insert a fuse other than specified. The voltage and ampere specification to fuse, will be marked at the circuit board, very near to the fuse clamp. Insert a fuse of same rating only. Using other fuse, rated higher ampere rating, might make things worse.

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You will need to remove the back of the TV. Don't worry, it's not that bad.

There are 4 screws across the top, one on each side, one right next to where the power cord goes into the back of the case, and the two more by all of the video connections **These are the most important to remove because they attach the main board to the back of the case.

Once you have remove the screws then the entire back of the set will slide off. If you look where the power cord attaches to the board you will see a small fuse. This is a 6.3 Amp 125 volt fuse. You can replace it with a 6.3 Amp 250 volt fuse from your local Radio Shack. A four pack costs between $3 and $5.

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