Question about RCA HD50LPW175 50" HDTV

Open Question

Ballast / Color Wheel?

First of all, I should mention that this is my first attempted DLP repair.

I have looked over the Service Manual and have made some very solid progress (I feel). I'll let you know what I have done so far and what I'm stumped on.

From "ATC336_Manual_lite.pdf"(which I got from another guru here (thanks))

Flow Chart "No Video - A"

Applied AC power, achieved normal boot up sequence, Began start up. Did instrument start normally and display video? :P Obviously not, onward to "No Video - B"

Flow Chart "No Video - B"

Did Color Wheel Spin? No, I have removed the lamp assembly and made sure to close the "Lamp housing safety circuit" and observed up close that the Color Wheel is NOT spinning.

Possible Light Engine Reset Failure ->
Remove AC power CHECK ->
Disconnect HDMI Cable to Light Engine CHECK ->
Apply AC power and wait for boot up signal to complete CHECK ->
Connect to any monitor capapble of Composite VIdeo Dislpay CHECK ->
Visible Video on Monitor? YES (I see a black screen with a few fuzzy white lines)
DM Module Ok
Go to Light Engine Troubleshooting chart
PROBLEM #1 (this is the same step I would have went to if they Color wheel DID spin, which leads me to believe that The said above steps should have "Fixed" the color wheel not spinning problem

Light Engine Troubleshooting Chart

Successfull Booth Sequence (5 blinds, Power LED stays on)
Color wheel Spin NO Remove AC and check Color wheel connectors and Color Wheel (I cannot figure out how to actually GET to the Color wheel)

Noting Problem #1, if the said steps had supposed "Overlooked" the color wheel not spinning... next box for Light Engine Trouble Trouble shooting?

Problem #2 Did Lamp Turn on? (Lamp Fan Start) Oddly, the FAN does start spinning but the Lamp does not start.
Continue to Light Engine TS - B

Remove Lamp CHECK ->
When boot up sequence is complete; turn on.

When the lamp strike occurs do you hear a tick? No, the ballast does not tick as it attempts to strike lamp arc.

So I guess the primary question here is Does the Color Wheel have to turn in order for the ballast to strike the lamp?

If so, does this mean the wheel needs to be replaced; if so; anyone have a diagram of how I un-house it?

If the ballast IS the problem; would a fixed one solve my problem and also make the Color Wheel turn again?

If I need any manuals with this response; my e-mail is

Thanks tons in advance!!!

Posted by on

6 Suggested Answers

  • 15935 Answers

SOURCE: New problem... replaced color wheel and lamp still won't work

This set has had issues with the power supply. It may have defective capacitors. This would require disassembly and replacement of parts.

Do you have test equipment and a service manual?

If you have a repair shop
do the repair, your cost may be $300.00- $400.00 to repair.

Parts and manuals can be purchased at:

Posted on Jan 08, 2009

  • 6 Answers

SOURCE: Color is wrong after color wheel replacement

I am not sure about your model but i do know on some samsung dlps there is a dip switch that has to be changed if you have the backwards color after changing the color wheel.I hope this helps.


Posted on Jan 22, 2009

  • 40 Answers

SOURCE: wont turn on

light engine... lots of money...

Posted on Mar 29, 2009

  • 3130 Answers

SOURCE: how can i check my lamp ballast in a rca scenium

are you sure when you replaced the lamp you seated it correctly, no really hapens all the time so dont feel bad. also another common error is the lanp door is not seated or closed and locked properly that is the most common problem that happens after a lamp is replaced, or the new lamp is bad never throw out your old one as somr dealers will give you what they call a core refund , they reuse the case around the old lamp. some can be worth as much as 50 to 60 bucks!!!
Larry Dillon

Posted on Sep 04, 2009

  • 199 Answers

SOURCE: DLP Won't Finish Power-up Cycle


Yes replacing the lamp would do the trick because the Heaters or guns have become weak .

Good luck

Posted on Dec 05, 2009

Testimonial: "I received an excellent response just minutes after entering a question very early on a Saturday morning."

  • 998 Answers

SOURCE: have sound but no video,

Yes sir the problem is the color wheel try to replace it. Remove the lower access panel from the back of the set. To the left of the lamp housing, you see the color wheel. Unplug the two leads and, using the Torx screwdriver, carefully remove the three screws that hold the wheel to the lamp housing. Good day and best regards.

Posted on Sep 03, 2011

Testimonial: "Thank you, I will order the color wheel motor and tell you how it goes once I install it."

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Replacing uhp lamp and remove ballast with Xenon lamp and 55W ballast!

You are going to ruin the optics using a Xenon lamp. The ballast in the TV talks back via UART to the CPU. By removing the ballast the TV cannot talk to it and run itself properly. Also using a xenon lamp will give terrible color reproduction as its not putting out nearly enough lumens in the right spectrum. It will also bombard the color wheel and DLP chip with UV light and ruin those as well.

Aug 30, 2015 | Mitsubishi WD Projection Televisions

1 Answer

How do I fix the color? We replaced the dlp chip and since then we see blue lips and brown grass/trees.

Your color wheel is not calibrated properly. It needs to be re-aligned with the colorwheel. That will require access to the service menu. Service manual eprom result list ElektroTanya Service manuals and repair...

Here is the service manual which will show you how to re-align the color wheel.

Feb 24, 2015 | Mitsubishi WD65737 65" DLP TV

1 Answer

I have a Samsung dlp, the front LAMP flashes and there is a humming noise from the left side. What is the issue with th DLP?

Color Wheel. Look up your Model on this website
Encompass Parts Distribution they will list Part/number and their Prices. I found my lamp on Ebay for $85.00 and Ballast board for $65.00.
Also here on FixYa was a Post with Sevice Manual showing you how to Replace Color Wheel.

May 03, 2010 | Samsung HL-R4264W 42" DLP HDTV

1 Answer

Ballast or color wheel next?

The color wheel will normally spin-up even for a brief moment when the set is powered up. I have not seen a color wheel go out with a lamp. I have seen a ballast go bad with a lamp. I would replace the ballast first. You did not state wheather the color wheel was noisy or not. On the Samsung DLP, the color wheel is normally very noisy before it is gone. I hope this will help you.

Apr 29, 2009 | Projection Televisions

1 Answer

Hlp5063w 50'' DLP samsung Experiancing The Word LAMP green letters flashing for 20 second followed by clicking noise then shut off.. then repeats that same process twice then TIMER / STANDBY/TEMP/LAMP...

Sounds like you've already gotten into the repairs. The three major things that fail on DLP are the bulb, the ballast and the color wheel. If your bulb is new and you aren't getting anywhere, replace the ballast, if that is still a no go, then move on to the color wheel. If replacing those three doesn't fix the problem, you will have to whip out the multimeter and start looking for problems on the PSB. You can get a ballast on ebay for about $100. Start there. The color wheel should be very freely moving. If something is grinding and hindering the movement at all, you need to replace it. That grinding may not seem like much but it is likely enough to keep the wheel from spinning at proper speeds. The sensor then kicks in and tells the brain that there is a problem and the brain keeps the ballast from firing the lamp.
Good luck.

Feb 18, 2009 | Samsung HL-P5063W 50" Rear Projection HDTV

1 Answer

DLP lamp won't stay on

After 2 hours of web searching, I finally found a service repair manual. Below is the link to the site. After scanning this manual, beginning on pg 61 is the troubleshooting guide. It sounds like the problem is the ballast if the lamp checks out ok. Let me know your thoughts after looking at this and hopefully the both of us can work together & come up with the right solution on how to fix our problem with our 56" Gateway DLP.

Dec 28, 2008 | Gateway DLP56TV 56" Rear Projection...

2 Answers

I need your help with my DLP TV


Jun 04, 2008 | Samsung HLP4663W 46" Rear Projection HDTV

2 Answers

Loud buzzing sound

Hello Jack,

That buzzing might be two things. It could be the color wheel or the ballast for the bulb. To check this you will have to move the projection section of the TV out of the case and listen for the sound in the area of the color wheel and the ballast. Try removing the color wheel power to see if the buzzing stops if it does then it's the color wheel is not and the ballast is buzzing then It's the ballast, and it will need replacing or if you know electronics you could try fixing the old ballast (I would suggest getting a new ballast).

Better still if you are uncomfortable working on the set you could get a qualified TV repair person to repair your TV .

I hope this helps,
Thank you,

Jan 07, 2008 | Projection Televisions

3 Answers

DLP TV Samsung HLP4674w No Picture

If you hear a ticking and or buzzing sound as it is trying to start up then most likely the replacement lamp is bad. Take it out and reseat it one more time to see what happens. The noise you hear is the ballast attempting to fire the lamp up.

Nov 30, 2007 | Samsung HLP4674W 46" Rear Projection HDTV

Not finding what you are looking for?
RCA HD50LPW175 50" HDTV Logo

Related Topics:

299 people viewed this question

Ask a Question

Usually answered in minutes!

Top RCA Projection Televisions Experts

The Wyzzyrd

Level 2 Expert

83 Answers

D. E. Hev

Level 3 Expert

1059 Answers

Ron Dufek
Ron Dufek

Level 3 Expert

398 Answers

Are you a RCA Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides