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PM 909 monitor with a leaky C61 capacitor--however, the cap seems to be too big for the rating listed on the the side--it looks like it says 4.7u, 50V, although the dot looks suspiciously like a subscript 1--anyone know the true rating of this cap?

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This is a high frequency non polar electrolytic. I just replace the same cap and the new replacement was almost the same size

Posted on Aug 13, 2008

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Blue power light flashs and won't turn off and has no picture or sound


It may have bad solder joints in the power supply board, look at the solder joints on the Thernistor and DC filter caps for leaky/domed tops.
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: www.interliquidparts.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Jun 25, 2011 | Sceptre X37sv-Naga 37 in. LCD Television

1 Answer

Does anyone know what the initial DC voltage is on this, as in, where does the 120DC coming out of the rectifier go(into)?


The DC voltage on the big cap on the AC primay side which is hooked up the output of the bridge rectifier should have about 160~170DC (120vac x 1.414 = 169vdc) on the cap, this DC voltage is fed to the switching step-down transformer which is driven by the MOSFET.
BE REAL CAREFUL ON THE PRIMARY SIDE! Do not work on it unless you are using good isolation transformer for the 120VAC source or at least use it the 120vac from the GFI outlet!.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX2035/

What is it not doing?
PM me if you me to send you the service manual: budmrtn@aol.com


Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Dec 31, 2010 | ViewSonic VX2035WM LCD Monitor

3 Answers

The ceiling fan spin was slow. The c61 e185116


Hi, replacement capacitor can be found at amazon. Take a look here: Amazon com c61 capacitor 4 wire. I hope this was helpful. cheers

Jun 22, 2010 | Hampton Bay 54 In. 5-Blade Fan, Chestnut,...

1 Answer

I own a XG-91D monitor that the screen goes black after about 5 seconds. I found 2-470uF 25V capacitors on the power supply board that were leaky - replaced them but the problem still persists. There...


Hello,

Replace thee 1000uf caps too. A capacitor meter will not test the ESR ( equivalent series resistance ) of the caps the cap meter will show them to be good but an ESR meter will show then to be bad. Also be sure to use low ESR caps. If you use general purpose aps like from Radio Shack it can damage the board board because of the ESR rating. The temp rating needs to be 105c or the new caps will blow out within a month because of the heat in the monitor case ( No fans ).

I hope this helps, if so please rate our solution.

Buddy
Corporate Computer
www.ccl-la.com

Mar 17, 2010 | Xerox XG-91D 19" LCD Monitor

2 Answers

At start up, my monitor is a dull white with a few coloured verticle lines. All caps look fine and seem to charge with an ohms test.Monitor turns black after brief start screen.


Ohm test is not real valid testing for cap, you can have cap with high ESR but you need good cap meter for testing that, try checking the resistance of the secondary winding of the inverter transformer, the problrm can also be bad lamps. Do you have 12~18vdc feeding the inverter circuits, see some pictures here: http://s807.photobucket.com/home/budm/allalbums
I am not sure if the 19v5 uses the same chassis as 20v5.

Feb 21, 2010 | Westinghouse LCM-19v5 Monitor

1 Answer

No display flashing power button


savato321, Most black screen lcd monitor owners don't have the smarts to open up their monitors to do a VISUAL inspection of the "switch-mode-power-supply/inverter supply!!!! You're good. Now you will need to know some stuff about electrolytic filter capacitors! First, the "uf" or "UF" means micro-farad! It is just a rating given to express the storage capacity of the device. Next is the voltage rating. A 16v rating means that the capacitor should never be placed in a circuit where the voltage will exceed 10 to 12 volts DC. Your 820 uf cap rated at 25volts will most likely be in a 12 to 18volt dc circuit. Now for temperature rating. All caps have a maximum temp rating. Most clock radios, stereos, will use 85 degree centegrade rated caps. Printers,PCs,monitors, will use 105 degree C rated capacitors. Never replace with lower specification units! You can GO up but never DOWN. If 1000uf 25v is all you can get it's OK. If you can get 820uf 35v units and they are not too big and they will fit on the board sure you can use them. I would stick with the OEM design voltage rating. Electrolytic CAPS are polarized!! You must replace them + to + and - to -!!! If you screw -up they will blow-up!! The wire lead closest to the printed STRIPE on the cap will be the negative and the unmarked terminal will be the positive. If you visit www.ccl-la.com/badcaps.htm you will get more info on recapping your SMPS. You can also watch some DIY videos at YOUTUBE for "lcd monitor repair" that might be helpful. Also visually inspect the SMPS/inverter printed circuit board for "COLD" FROSTY looking solder joints. They should all have near mirror finish to them. Let us know the name of the BAD CAPS you remove from your unit. You may even want to document with pics with a digital camera what you find. Well, good luck guy

Jan 17, 2010 | Samsung SyncMaster 932B LCD Monitor

5 Answers

I have a Samsung Syncmaster 932b LCD monitor. When I turn it on, the screen just flashes on and off, as does the blue light around the power button. I read up online and found that the capacitors on the...


savato321, Most black screen lcd monitor owners don't have the smarts to open up their monitors to do a VISUAL inspection of the "switch-mode-power-supply/inverter supply!!!! You're good. Now you will need to know some stuff about electrolytic filter capacitors! First, the "uf" or "UF" means micro-farad! It is just a rating given to express the storage capacity of the device. Next is the voltage rating. A 16v rating means that the capacitor should never be placed in a circuit where the voltage will exceed 10 to 12 volts DC. Your 820 uf cap rated at 25volts will most likely be in a 12 to 18volt dc circuit. Now for temperature rating. All caps have a maximum temp rating. Most clock radios, stereos, will use 85 degree centegrade rated caps. Printers,PCs,monitors, will use 105 degree C rated capacitors. Never replace with lower specification units! You can GO up but never DOWN. If 1000uf 25v is all you can get it's OK. If you can get 820uf 35v units and they are not too big and they will fit on the board sure you can use them. I would stick with the OEM design voltage rating. Electrolytic CAPS are polarized!! You must replace them + to + and - to -!!! If you screw -up they will blow-up!! The wire lead closest to the printed STRIPE on the cap will be the negative and the unmarked terminal will be the positive. If you visit www.ccl-la.com/badcaps.htm you will get more info on recapping your SMPS. You can also watch some DIY videos at YOUTUBE for "lcd monitor repair" that might be helpful. Also visually inspect the SMPS/inverter printed circuit board for "COLD" FROSTY looking solder joints. They should all have near mirror finish to them. Let us know the name of the BAD CAPS you remove from your unit. You may even want to document with pics with a digital camera what you find. Well, good luck guy. 12fixlouie

Dec 24, 2009 | Samsung SyncMaster 932B LCD Monitor

1 Answer

Problem with the C61 Capacitor


Either take it to a motor shop or you can get one from Grainger.com. Get the micro farad rating (uF) on the cap and the voltage rating.

Jul 09, 2009 | Lake Breeze SG16B3 Stand (Pedestal) Fan

1 Answer

Ikegami pm 909 shrinking picture


The deflection current is dropping in both vertical and horizontal. This suggests a low B+.This can also be caused by a flyback problem. Check all the Caps in the HV section. If not, it's the flyback.


Aug 13, 2008 | Home Security

5 Answers

Can changing 3 capacitors on motherboard solve my problem?


We had a power surge and my VL2018W LCD monitor stopped working... blank screen and flashing blue light.

I carefully opened up the back and found the power board (the one the AC plug goes into). There were about 5 electrolytic capacitors that were bulging (but not ruptured). There were 3 with the values listed by the original poster (470uF @ 25V) and 2 with 1000uF @ 10V.

I scrounged a couple of 2200uF@10V caps for the last two and bought 3 470uF @ 35V caps from Radio Shack (P/N 272-1030).

Luckily, the monitor came right back up and seems to be OK. It was out of warranty, so there wasn't a big risk.

Just increasing the working voltage won't do that much for you. If any caps are bad, just replacing them with the same value is good enough, but a higher working voltage won't hurt (usually means a bigger cap).

Good luck.

Rich

May 04, 2008 | Princeton Digital VL2018W Monitor

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