Question about Toshiba TDP-S8 Multimedia Projector

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Tdps8 is dead. replaced swollen 3300uf cap in psu. Wave form on collector of the chopper transistor is poor.

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  • larryavent May 11, 2010

    this didn't fix your unit?

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Replace it. and you might want to replace the cap with one with a higher voltage, too. toshibas are known for their blown caps that are underrated.

Posted on Nov 11, 2009

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Failed Repair Job. A friend of mine called a loocal repair shop to fix their LG50PC3D 9 x 10V 3300uf 105c Capacitors on the Power Board were swollen 1 x 50v 680uf 105c Capacitor on the Power board was...


replacing the 10V caps with 25V caps is perfectly fine. In fact, if it was manufactured like that, those caps may not have blown.
Replacing a 680uF with a 1000uF could be problematic depending on it's function.
680uF is pretty specific when 500uF and 1000uF are much more common and therefore cheaper - one would think that the engineers would have tried using those in the design rather than a 680uF - makes me think the value of the cap is important to the frequency of the circuit it's in.
Other concerns might be whether he got any of them in backwards or not.
That's a rookie mistake, but still an easy enough one to make (for a rookie).
Also, with that many swollen caps, I wonder if there were any that leaked out the bottom before swelling at the top (IE - if some caps were missed in the replacement procedure)
Also, with that large a number of caps gone, other components may have been compromised or blown.
I'd be testing the transistors around those caps (most likely punched through rather than open), looking for fusible links (surface mount fuses, 0 OHM resistors) that may have opened up etc.
The initial attack on the problem was basically correct, and in many cases probably would have fixed it (if say the 680uF cap was functioning as a ripple filter).
But when that didn't fix it, a deeper analysis should have been done to complete the repair (including locating a 680uF cap).

Feb 27, 2011 | LG 50PC3D 50 in. Plasma Television

1 Answer

Dead set ; fuse , ic regulator , horizontal output transistor , r2m diode replaced already. Still dead set.


Hi,
You need to confirm where is the trouble before replacing any parts.
Test the B+ on the H-out transistor.
No-check the B+ on 160v electrolytic cap.
If No B+ here then the trouble is in the regulator section before the chopper if it has.
Let me know the reading from your ohmmeter.
Thanks for using Fixya.
JDVillanueva

Feb 03, 2011 | Televison & Video

1 Answer

Audio and picture go dead red light blinks 7 times


A protection circuit has cut in - possibly due to a fault in the line output stage (flyback transformer could be short-circuit and horizontal output transistor could also be shorted).

Assuming the power supply/HT rail is all OK, replace the above parts, touch up any suspect solder joints, check and replace any capacitors (electrolytic and the tuning caps in the collector of the horizontal transistor - always replace these caps (rated at around 2kV - 6kV) whenever you replace the flyback)

Jan 24, 2011 | Sony FD Trinitron KD-36XS955 36" TV

1 Answer

I have a Dell E172FPb LCD monitor with a black screen and blinking power light, no leaky or swollen capacitors inside, what can I do to repair it? Thanks.


Check out the four transistors (c5706/5707) Emitter to Collector (see picture of the transistor in my transistor album for pinout), it should read open circuit (should be checked out off the board). This is common problem. Make sure to inspect the solder joint in on the board, especially around the inverter transformer pins. Make sure the fuse read out less than one Ohm also.
http://s807.photobucket.com/albums/yy352/budm/Dell%20E173FPb/

Basic LCD monitor and LCD TV troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV, Monitors, Caps : http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitor kits: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Replacement board: http://www.lcdrepair.us

Nov 06, 2010 | Dell E173FP 17" LCD Monitor

1 Answer

Sony kv-xf25m30 trinitron clicks wont turn on


Yup sounds like a classic SMPS fault OK, probably the "Chopper" transistor? but could also be the controller, the best way is to get a new PSU, but check to see if PSU is OK without a "Load" if it is then it is NOT your PSU,and the fault is elsewhere and is shutting it down. Usually it is something drawing a lot of current.. often in the Horizontal section, but not always.. GL

Jan 31, 2010 | Televison & Video

1 Answer

Chopper transister blown fuse blown


100k ground from ic pin replece 3 electrolytic cap . Adjust preset for 95v if it isphilips tv

Aug 17, 2009 | Televison & Video

1 Answer

Peavey 8.5c amplifier. One channel dead. In


FIrst of all, in bridge mode there is only one channel. The "bridge" means that you combine the two channels together to get a single more powerful amp. The swollen part is probably nothing. Sometimes the plastic caps cup like that. Unless there is a specific problem with the amp, don't worry about it. Try placing the amp into stereo mode and testing each channel. If both work, there is no problem with the amp. If for some reason you need repalcement capactors, contact Peavey directly. They supply replacement parts.

Dan

Mar 19, 2009 | Peavey Audio Players & Recorders

3 Answers

No Power to My Toshiba TDP-S8


We as Atp Computer Consultants do a lot of onboard repears on laptops Projectors and lots more.

We found that on the Power Supply is a cap that needs to be replased. The cap should be swollen just replace the cap and it should work

Oct 26, 2008 | Toshiba TDP-S8 Multimedia Projector

1 Answer

Horz. Output Transformer for a GE Mod#46GW945


Check this guys: //http://www.electronica-usa.com/
This guys may carry that part: //http://www.globalsemi.com/search.aspx

Jan 24, 2008 | GE 46GW945 46" Rear Projection Television

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