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I haveSansui 1403ctv the tv set is dead.no output from smps.When I switch on the tv immediatly switching transister(c1802) will be short.

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  • Televison & ... Master
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Check the freewheeling capacitor connected to the collector of this switching output transistor for open. Check the serial resistor too.

Posted on Dec 05, 2012

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Posted on Jan 02, 2017

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SOURCE: TV PROBLEM

After replacing the shorted Line driver Transistor, carefully removing and replacing the same CRT base circuit, resulted with the problem going away. I cannot say what really was the cause, but I suspect that there could have been some form of acing on the neck of the tube.

Posted on Jun 01, 2007

MikeNJ1964
  • 398 Answers

SOURCE: No Power on Sony TV

Be sure to use an ORIGINAL Sony transistor and be sure to resolder the pins of the small horizontal driver transformer and all parts connected to and around it, and your set should be fine.

Posted on Aug 18, 2007

SOURCE: Sony 2167 No power on

check video processor output diagram and signal amplitude if u can find video processor raplace it and try it must work

Posted on Sep 14, 2007

  • 556 Answers

SOURCE: tv dead

please check flyback transformer for short
good luck

Posted on Nov 02, 2007

jerryg50
  • 1667 Answers

SOURCE: Sony 2167 No power on

I have not worked on your particular model. But, I have serviced many TV sets over the years. My answer will ge generic.

Check all the capacitors in the horizontal output stage and power supply areas for high ESR. All the caps that are out of spec must be changed.

The high voltage multiplier & flyback can also cause the fault you are having.

You have to consider that the DC voltages are not the only important spec that has to be met. There are also many power drive signals that work with reactive devices. If there is any defect in the critical areas there will be failures.

Jerry G.


Posted on Nov 26, 2008

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I HAVE SHARP COMPANY 21 INCHES CRT MY FRIEND TV SET PROBLEM IS SET DEAD IN POWER SUPPLAY TRANSISTER 1886 REPLACED AFTER POWER SUPPLAY IS OK FBT ARCKING THEN IMMEDIATLY SET SWITCH OFF SET IN CIRCUIT R6


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. 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/

Nov 21, 2014 | Sharp Televison & Video

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Tv horezantal transister hot


Check for any short circuit at the horizontal output section circuit. Check all the non-electrolytic capacitors used there. Replace all suspected ones with same capacitance value. A winding short in the windings of deflection yoke, will too make the horizontal output transistor to get overheated. If so, there is no other way than replace the deflection yoke. If you wish to get more details, check the site linked here. http://electronicshelponline.blogspot.com/
Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

Sep 11, 2013 | Televison & Video

1 Answer

My china tv horezantal transister heatup


Hello
If horizontal output transistor heats up rapidly within seconds after the TV is switched on, surely there is some fault in the horizontal output section. It may be either with deflection yoke or horizontal output transformer. Deflection yoke fault is very rare, about 1% or so. but the horizontal output transformer fault is common. The winding in the horizontal output trnsformer, otherwise called as line output trnasformer [LOT] also. can be shorted inside it, and is irrepairable. It should be replaced with same type and number. Number and type is mor important, and should be insist on. Replace the horizontal output transformer. OK.

Feb 12, 2011 | Sanyo Televison & Video

1 Answer

Tv does not come on with off on switch or remote. Set completely dead. VCR doesn't run either. Fuse is OK and circuit board looks like new. Nothing looks overheated.


Quite possible that the fault is relative to the power supply of the TV. So it is important that the voltage is measured of the output in the SMPS - switch mode power supply.
If there is no output the SMPS is faulty , failure of driver or frequency oscillator.
Please check the link below:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Once the power supply is restored the voltage feed to the processor and sub sections must be checked, for failure of any regulator or fusible resistors

Jan 19, 2011 | Televison & Video

1 Answer

Hitachi 42PD7200 Plasma TV gone dead


this problem is from smps power supply of your tv circuit, may be power capacitor may be short , power transister may be short pls check some spair of power supply

Apr 06, 2010 | Hitachi 42HDT79 42 in. Plasma Television

1 Answer

TV IS DEAD. NO POWER AT ALL. HAD A SERVICE TECH LOOK AT IT. HE SAID THE PCB HAD TO BE REPLACED. IS THIS A COMMON PROBLEM? IF SO , WHY?


If the set is totaly dead then the first place to start is with the SMPS (Switched Mode Power Supply). However sometimes other parts will cause the Power Supply to short out as well. If and when the Power Supply is replaced and the set comes back to life and operated with a Menu then you are probably ok. Note: On your set when replacing the SMPS the tech Must adjust the SMPS voltages to the Panel Voltages. There is a sticker on the Panel that list the voltages the tech must adjust on the SMPS.

Jul 16, 2009 | Samsung HPT5054 50 in. HD-Ready Plasma...

1 Answer

15" CRT Monitor samsung totally dead


Dear munu007 good morning this is viswanath

Don't worry I can salove UR problem

1.First U can check any physical damage in power supply (220/400v)Main capacitor,
2.And also check LOT It's OK Than Remove H O/p Transister, check SMPS output voltages ,voltages are currect That means SMPS is OK.Check Boosting FET IRF630(Q402)Change it New One,and also change the IC604 7805 Regulator.
Finally change LOT.
check any dry points (SMPS&Hori.)

Oct 08, 2008 | Samsung SyncMaster 551 15" CRT Monitor

1 Answer

Sony Tv Model KV2162 M9


The SONY 2162 is a Old Warhorse. It was manufactured nearly 20 years ago. If the set is dead, and if no one has tampered with it, it can be repaired. One problem I found often in the 2162is that it's mains ON OFF switch failed regularly. check that.If you have knowledge of Solid State Electronics, please carefully open the Back Cover and first check the fuses. If they are ok, then check the SMPS switching transistor. If it is short circuited, then replace. Also check the Horizontal Output Transistor at the same time.

Aug 26, 2007 | Televison & Video

1 Answer

Sony 2167 No power on


check video processor output diagram and signal amplitude if u can find video processor raplace it and try it must work

Aug 13, 2007 | Sharp 32C-240 32" TV

1 Answer

Dead power supply power across the bridge 700 volts across the main capacitor indicating smps is filtering


sounds like you have a dead switching suppy. On these sets the best way to trouble shoot the power suppy is disconnect the horizontsl output and measure it Is it shorted yes replace the fly and the transistor and resolder several cold joints in the horizontal drive curcuit as well as in the main switching supply. If the HOT not shorted then your gonna need a service manual unless you shotgun the repair. Good Luck

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