Question about Radio Shack Cinego D-1000 Multimedia Projector

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Ballast How do you identify the ballast and how do you fix it? Is it fixable?

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Fixable by a professional, and expensive $600.00 +/-

Posted on Jul 17, 2008

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LP650. How can I bypass ballast?


I don't know what you want to bypass the ballast for. That unit sold for 3500 USD when it was new. The ballast is not something that you can bypass. There are two primary connections on it and three secondary, there is also a current sensor. If you bypass it then the current sensor wont let it come on anyway.

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I have a Sanyo plc-xt25 LCD Projector and when I plug my ac cord in, the fans turn on but no lamp comes on. I changed the lamp and still no picture. What do I do?


Every projector lamp is equipped with ballast. The problem area is ballast. Either the ballast is not getting DC supply or the lamp turn ON signal from the projector main board or the ballast is faulty. Remove the lamp. Connect the projector to the mains supply. Check the voltage at the lamp connector inside the projector without turning it ON. It should be around 65 volts A/C. (Warning: Multimeter will get damaged if the projector power is turned ON due to generation of high voltage) If you find this 65 volts then it confirms that it has DC supply & the ballast is functioning. The ballast receives the the turn ON signal from microcontroller through opto-coupler on the ballast. The ballast opto-coupler can be checked by providing external 5V DC supply between pin 3 (+ve) & 4 (-ve) in turn switches ON the lamp. If this works then there is no problem with your lamp & ballast. The problem lies with the main board. If this does not solve your problem then give me the feedback.

Aug 04, 2011 | Sanyo PLC-XT25 LCD Projector

1 Answer

I have a infocus IN35 that at 100 hours burnt out a bulb. Thinking that it was just a bulb problem I bought a new bulb and it lasted 20 minutes. a t.v.repair shop said its probably the ballast that is the...


It is not a common problem. Ballasts rarely need repairs. Have you reset the lamp hours to zero after installing new bulb? If, yes to confirm about ballast please ask the TV repair shop man whether previously he had repaired any DLP projector. There is lot of difference in technology of DLP projector & TV (except DLP Projection TV). The problem could be in the projector main board. The lamp lights after getting Lamp ON signal from the projector main board. As the lamp ignites the ballast sends the signal of Lamp Lit. If the projector board senses that any blower/exhaust fan or colour wheel is not running then it will send a signal to Switch OFF the lamp. If you are tech-savvy then do as follows to check about lamp & ballast. Remove 5 pin connector from the projector. Connect projector to mains supply. Get a 5V DC power supply. Connect +ve to pin 3 & -ve to pin 4 of the ballast connector from this supply. The lamp should light. If it does not light then there is problem in the ballast (if the lamp is new). To give a chance you can check it for your lamp which lasted 20 minutes. Generally ballasts are made by OSRAM. You can get the ballast from OSRAM dealer. You will need the part number for that. Take out the ballast, it is there on it.

Apr 14, 2011 | InFocus IN35 Projector

1 Answer

How do I replace the ballast in an InFocus IN26? And while we're at it, where do I get one? I've already replaced the bulb with a new one (direct from InFocus), reset everything to factory settings, and...


remove the front and rear bezels, remove the top cover, take a picture of the location of screws and ground wire on the metal frame. remove the top boards, remove the metal frame and there is the ballast/power supply. pay attention to the way the cable is routed to the lamp connection, also pay attention to which way the connection from the ballast is seated in the lamp housing. hopefully a new ballast will fix it for you, as to where to get one, that's iffy. you could try to find an in26 on ebay that has other problems but has a working ballast

May 11, 2010 | InFocus IN26 Multimedia Projector

1 Answer

Panasonic PT-LB10U do not work lamp ok ballast ok issue is with the power suplly that do not send 15v dc to the ballast need to fix the power supply it send 380 v dc to the ballast but do not have the 15 v...


You have to replace the transistor Q107 on the board ETXM519MBGB
this is pnp type but i can't find it on service manual.So if you don't like to make experiments replace the board.

Oct 21, 2009 | Panasonic PT-LB10VU Multimedia Projector

1 Answer

Toshiba TDP-P4 Defect Ballast The lamp starts for ahalf a second, just a little flash. Tried a new lamp same thing. I suspect the ballast. Used de service manual and from Power Supply it gets the 5v wich...


the 5v from the power supply is just the signal voltage. the ballast, once ignited, sends about 350vdc to strike the lamp for a few seconds then lowers to 40vdc to maintain it. unfortunately, $261 is a standard price for it.

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2 Answers

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Jun 28, 2008 | Multimedia Projectors

5 Answers

Lamp


I have the CP-X275W that did the same thing. The ballast was bad and I fixed it with a $5 switching regulator. The CP-X327 has the identical ballast.

Details:

The High Intensity Discharge Metal Halide lamp suddenly failed to light up. A new lamp was installed and would not light up either. The fan ran and the lamp LED flashed after a few minutes. Voltage to the ballast module was 368VDC. The ballast did not pulse.

Ballast# PS-226-LS-210 was bad. Hitachi Part# HA01101 has been discontinued and the new part number is HA01102. It was $210USD at Vance Baldwin or $221USD at Part Solver.

The FET series (TR1,5,6,7,8,) seemed good: (drain-source resistance=5Kohm). Bought an identical projector on Ebay to do comparative multimeter measurements. Found resistance differences in IC01 (STRG6153). Swapped good part to bad projector, and it worked. This is a 5-pin Sanken brand switching regulator, US$5 at www.electronix.com. They have the STRTG6153, which is compatible, and may be better. The bad one removed from the circuit measures 15Kohm on pin 3 to pin 5 and the same 15Kohm when the probes are reversed. The good one measures 18Mohm and infinite when the probes are reversed.

If you would like me to fix it for you and clean all your optics, I can do it for $150USD plus $25 return shipping. Contact Chris at chris_goulet@yahoo.ca.

If you have a new lamp for sale I would buy one for $100USD.

Good luck.

Dec 22, 2006 | Hitachi CP-X327 Multimedia Projector

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