Question about Panasonic TNPA5066AD SN Board

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I replace five transistors in TNPA5066 board and i forget thier sequence .. pleace help me quickly

These transistors were dead and i take off them and i buy new transistors but i forget their sequence on the board

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Where can I get the scematic for the Veco 21 STC voltage control circuit board?


try mailing the manufacturer

hot transistors are usually shorted out, or driving a short!!

a multimeter across the 3 transistor legs (TO-3 transistors have 2 legs & the case which is the 3rd leg) will reveal if they're dead (remove the transistors first as the circuit may give a false reading) - if you get a zero ohms reading between any of the legs it's dead - don't forget to check the smaller driver transistors too,, as a dead main transistor will kill its smaller driver transistor

speakers are marked,, usually 4 ohms or 8, though sometimes 16 ohms - use a multimeter to ensure you have something very close to these values according to the label on the speaker box & measure from the wires at the point where they connect to the amp

power the unit without any speakers or speaker wires connected,, if the transistors still get hot, you're very likely looking at bad transistors

Feb 21, 2015 | Audio Players & Recorders

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Sansui sv29276


Replace all the capacitors connected to the horizontal output section. Especially capacitors connected to the collector of the horizontal output transistor.

Oct 16, 2012 | Sansui Televison & Video

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The mains input fuse (4amp) and a (1amp) fuse on the main power out board were blown. Replaced fuses and switched on, blown again, disconnected output from transformer to main board (4amp) fuse did not...


The cheapest option is to replace the transistors (a quick check on google will tell you how much they are). If they are common transistors you will be able to find them and get them quicker then searching for a board that could be no longer being made.

Sep 02, 2010 | Mackie SWA1501 Subwoofer

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TV went out.


U have a dead power supply board,burn componnents parts on the power supply board.Replaced the power supply board,u will get ur power back as normal function as before.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

May 02, 2010 | Philips Magnavox 42MF521D/37 Television

1 Answer

Stand by\timer blinks,picture go out everytime it blink .


Blinking codes meaning:

  • Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.
Good luck:

Dont forget to rate:

Jun 30, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

The transistor of my pioneer sx-203.i remove my power transistor so that i can replace but it lost...i dont know the code of the power transistor or the main transistor.


Tell me the board no or exactly where it is located or there will be a number like T XX for denoting the sequence no of that transistor

i have a good one working now with me
if you have users manual please send for me
Dennis

Apr 26, 2009 | Pioneer Audio Players & Recorders

1 Answer

Dead set, HOT transistor keeps shorting


It's the copper coiled magnet on the neck of the crt closest to the front of the tube.

Dec 21, 2008 | RCA 36V430T 36" TV

1 Answer

Dead set!


First, locate the horizontal output transistor. This is found very close to, or next to, the horizontal output transformer (also known as the flyback). The flyback should be on an aluminum heat sink, or on the side of the metal chassis. Disconnect or unsolder two of the three legs of the transistor. Measure it with your meter, or plug in the set with the light bulb attached across the fuse.
If the transistor is shorted, or the light bulb doesn’t glow bright anymore, replace the transistor and plug back in. If the light bulb glows bright again, you must replace both the flyback and horizontal output transistor simultaneously. In some cases this will fix the set, but sometimes there are multiple problems with a set.
Go to where the flyback is, and start measuring the diodes and capacitors on the flyback itself. If you don't find any shorts there, it could be a shorted vertical output IC, a shorted sound IC, a shorted disc capacitor in the Hi Voltage/sweep circuit, or in rare cases, a shorted capacitor or tuner.Feel free to ask and post whatever the result of your troubleshooting..


Hope this may help;

Regards,
VOTIT

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Jul 30, 2008 | Televison & Video

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