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I have problam with sasung 14" crt monitar after power on led just glow and off and secondry 56 volt geting started droping

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It is a problem with monitor PS card. you can checket from service center.

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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NO PICTURE ON CRT TV BUT THEY HAVE SOUND


Hi. This can be due to several resons. The most common one is a bad soldering on the CRT socket/pcb, whereas the heater of the CRT remains off. (no red glow in the neck of the picture tube.)
Make sure there is high voltage. You can hear this "getting on" when you switch the set on. I can also be that the g2 voltage is too low, or zero. Another reason may be "no horizontal drive" signal, 140 volts missing to the horizontal output stage as well. One needs to be an experienced technician in order to find out what's going on.

Oct 11, 2014 | Philips Televison & Video

1 Answer

Lg studioworks 900b power buttn led blinks fast but no on


There is some short circuit on the circuit baord. Check it. Horizontal output transistor and LOT should be suspected.

Feb 03, 2012 | LG Studioworks 700S 17" CRT Monitor

1 Answer

I have a friend with a quasar SP-3231 television manufactured in 1998. When they try to turn on the tv, you can hear the relays engage, but the picture never comes up. Preliminary testing indicates there...


The set you are talking about I am unfamiliar with .. however as an engineer for 23 years I am sure it is not unlike any other CRT TV as you say you have no voltage on the rgb is the tube heater on ( you should see a glow at the end of the tube ) if not check you heater rail voltage , check your oscilator Ht output transistor should be 300 to 360 volts on the emitter if this goes down then the lineoutput satge will not opperate hence no picture and in many cases the audio is fed from the secondry of the Line output transformer hence no sound either .. DO NOT ATTEMPT TO DO THIS UNLESS YOU HAVE HAD TECHNICAL TRAINING VOLTAGES HERE ARE IN EXCESS OF 19 KV to 25,000 Volts DEPENDING ON TUBE SIZE AND SHOULD NEVER BE ATTEMPTED BY UNTRAINED PERSONEL... Vortash

May 10, 2009 | Quasar SP-3231 TV

1 Answer

Glow-plug relay


to much power trace it back and make shure it is right size and not geting 24 volts it only needs 12 to convert to 9

Dec 11, 2008 | 1988 Ford F 350

2 Answers

EHT PROBLAM


EHT Problemsymptems :1.If U find R457 - 33k,R452 -1k,R458 - 10k Resisters are Burnt In Zenith 14"and15" monitors To replaced all thease resisters and LOT FSN14B016S
2.HCL HCM 482M, 580M,582M, 780M models getting FAT - FAT sound coms from LOT when u switch on the monitor It's LOT Problem . replaced it
3.Samtron Samsung Models like 45Bn, 55V,56V when u switched on the monitor Power indicator (Led )glow one time First u can check Boosting FET IRF630 bitween (SMPS O/P to LOT supply) and also replace LOT.
4.some Old Gold star anlog and LG monitors If U found 12k Resister near by LOT and also bulched 1Mfd/63V capacitor
It's LOT Problem

Oct 04, 2008 | Computers & Internet

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