Question about LG Studioworks 45 14" CRT Monitor

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Lg 500g crt monitor problem

I have one lg 500g monitor having problem with H-output transistor. It get over heated after some time & blows off. SMPS supply is ok. What is the problem

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  • Anonymous Oct 31, 2008

    I HAVE SAME PRB

  • Anonymous Mar 26, 2014

    asd

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  • 180 Answers

Hi,

Try checking B+ coil , may be the coil have shorted .

Happy trying

Posted on Apr 10, 2008

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1 Answer

Pincushion distortion of LG 500G CRT monitor, which parts is responsable for this.


hi,
You have to check the pin control transistor in the horizontal section. It will be fitted on the same heatsik on which the horizontal output transistor is fitted.It will be a small transistor as compaired to the horizontal driver. Also you have to check the three mosfets in this section used to control the width.
ok

Jul 31, 2011 | LG Studioworks 563N 15" CRT Monitor

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NO DISPLAY AT MONITOR.


If there is no display but only the monitor seems to switch on , hearing noise, then there could be a possible failure of the line output transformer. You will need to check out by opening the rear cover after disconnecting the power. power on the monitor for some time maybe about 10 minutes and switch off. Try to touch the LOT or the driver output transistor for heating, If so you have a failure of either or both of these components. If not you will have to check out the +B , main power line to the circuit for a break in the fusible resistors or the diodes in the power supply smps unit. Check also to see if there is any dry or loose connections in the CRT base unit. If so solder and check also on the main board for dry joints. Helpful I hope. Good day

Jul 29, 2010 | LG Studioworks 552V 15" CRT Monitor

1 Answer

My Lg Flatron switched off


  • that is a problem of smps
  • check the fuse inside the smps
  • check the component which blows the fuse e.g.diodes transistor
  • if faulty replace it

Apr 15, 2010 | LG Flatron L1510S 15" LCD Monitor

2 Answers

LG STUDIOWORKS 500G monitor dead ?


your irf 630 is not original purchase it from proper LG authorised service centre it is costly but never become faulty again duplicate mosfet overheats if your green led is on then measure voltage at E.H.T.connect meter at output transister if E.H.T. is producing then meter should show 1 digit if not then 50v will show take care that signal cable should be disconnected if E.H.T. is not producing then check +vcc at horizontal ic it should be 12v. if 12v is not present then check regulator ic 7812 insmps

Mar 14, 2010 | LG 500LC Monitor

4 Answers

My studioworks 500G monitor LED blinking with twise colour(Green and Amber)and no display.


1. LOT problem.

2. Horizontal transistor bad.

3. Dry points in neck board, horizontal section.

4. transformer output capacitors problem.

5. IRF 630 ( lot supply fet )

Nov 03, 2008 | LG Studioworks 45 14" CRT Monitor

1 Answer

Monitor is totally dead


Through my past experience I mwould remove the solder point at the input power B+ line to primary winding FBT. If the HOT has shorted there will be no power.Straight to the point if you know where the HOT is , you can desolder the middle pin or collector of the HOT transistor. If you desolder the pin which result the power led light turn up. That indicates either FBT or HOT has shorted

Apr 19, 2008 | LG Studioworks 45 14" CRT Monitor

2 Answers

Horizontal and vertical adjustments


Check components related with pots thats adding command ic to pots.If they are ok then change command ic with new one.Before this you can check horizantal hold transistor that is placed on hitsink of eht.small in size and check two small transistor placed near it on pcb.Hope this solution works .If not then i am here

Mar 10, 2008 | LG Studioworks 45 14" CRT Monitor

1 Answer

Lg 5552 v set is dead


try to resolder all points in fbt including fly back trans itself area also resolder the crt pcb area i had the same problem the reason was cold soders also put a good 2sc5297 for hor out.

Dec 02, 2006 | LG Studioworks 552V 15" CRT Monitor

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