Question about Televison & Video

1 Answer

RCA p46732ba projection TV no power.

I have an RCA p46732ba projection tv, and it will not power on. All i get when i plug the power cord in the back is a chirping sound for a few seconds. There is about 15 quick chirps before it shuts off. If i unplug then plug it back in right away, the chirping noise won't be there. In order for it to chirp again i have to leave it unplugged for about a minute or two. The noise is coming from a spot a couple inches in front of where the power comes in on the same main board.

Posted by on

  • 2 more comments 
  • egglestc149 Oct 06, 2009

    Ok so its a HV block can anyone give me a step by step to fix it myself.

  • egglestc149 Oct 06, 2009

    I am pretty technical, but how would i go about safely discharging a hv block? i know they are pretty dangerous.

  • egglestc149 Oct 07, 2009

    Well, I am committed to doing this myself, so I will really appreciate any help. If you feel like me doing this myself is the best plan of action then thats your decision.

  • egglestc149 Oct 10, 2009

    Thanks, this was very helpful, but my problem still persists. I replaced the HV block, and i still have the same chirping symptoms. Also, while i was discharging the tubes, none of them "popped" or did anything. Do you have any other ideas on what it could be, or is the board fried?

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 647 Answers

This is a common problem and the set is in shutdown mode. It attempts to fire up three or four times (the chirp you hear) if it detects a fault it shuts down - the most likely cause is the HV (high voltage) block- caution working on it since HV is present - The repair generraly costs $200-400 P# 205064

Google your model # and HV block to see what I mean.

Posted on Oct 06, 2009

Testimonial: "thanks alot"

  • 2 more comments 
  • johnnydiode
    johnnydiode Oct 06, 2009

    Th e HV block is located at the front of the chassis

    1- unplug set- remove speaker grill

    2-remove convergence board (2 screws) the board is hinged(step lock assy) to the top chassis .

    3 -look up and to the left of center the black piece with all the wires conneected to it is the HV block

    4-There are 5 red wires in a row (one for supply from flyback-one for each tube and one for focus/screen) inserted into the HV block. label/mark all wires there are also a group of white wires all going to the same gnd.bracket on the HV block

    5- Decide now b4 unplugging the wires if you want to continue -HIGH voltage is present and must be discharged b4 continuing (not a job for the inexperienced) also once you pull the wires out by bending back the plug holders keep in mind that the wires are difficult to reinstall properly they can bend as their re-inserted -damaging the new HV Block

    6 Remove HV block (2x1/4" screws one front and one back of block) tight access

    7 - remove all wires and install new unit - observe drawing on chassis regarding wire length if you have to re-dress a wire.

    Be shure all wires are seated firmly and make no contact with block when the set is live

    Good Luck

  • johnnydiode
    johnnydiode Oct 07, 2009

    Sorry, if you have to ask I don't feel comfortable telling.

    How far have you gotten so far? I personally would not feel good if you shocked yourself.



  • johnnydiode
    johnnydiode Oct 07, 2009

    Unplug the set. To drain HV have a jumper wire connected to chassis ground (metal casing) and using insulated (rubber handled) pliers remove each of the red wires an touch it to the jumper wire or directly to ground (which ever is closer) leave it there for a moment. Keep your free hand away from the ground casing. This will discharge the CRT's

  • johnnydiode
    johnnydiode Oct 11, 2009

    The suggestion I gave is for a very common fault. There are many other potential causes of a dead set and some skilled troubleshooting is usually required to determine cause.

    Genereic answer:

    Read below and decide if you want to tackle the problem yourself if so I’ll help along the way with what info I have. If not contact the nearest repair shop armed with the info below.



    A dead set (no picture no sound) can indicate any number of problems – Usually the set is in shutdown or protection mode – this means that the internal circuits have detected a problem with a supply voltage missing, drawing too much current, going over voltage or a short condition.

    The first thing to do is power off the set unplug it for 5min. than replug and try again. This in effect resets the main micro and will sometime unlatch a fault and resume working. There are certain common problems based on the make model – for instance convergence output IC’s(CRT projection TV’s) can cause a dead set symptom in many models. Vertical output IC failure can also cause the same symptom (CRT standard and Projection).

    The only way to determine the real cause is :

    By an educated guess based on experience or by directly troubleshooting the set – checking fuses, measuring voltages and checking for shorts. Many of the intermittent problems such as, int.(Intermittent) no sound or picture, int. picture shrunken or misshaped. These problems are generally due to cold (bad) solder joints (all TV’s and electronics) that break down under slight temperature changes or vibration and are usually verified by physically tapping the suspected area on the circuit board, or by quickly heating or cooling a suspected component or area ( cold spray and hot air gun). The other main culprit is leaky or dried out capacitors or capacitors that change value depending on temperature. These can sometimes be seen as bulged or leaky and have an acrid odour.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

MY RCA D52W20 TV NEEDED A REPLACMENT PLUG. I REMOVED THE WHOLE PLUG OUT OF THE BACK OF THE TV. I CAN'T FIND WHERE THE PLUG ATTACHES INSIDE OF THE TV?


the rca model itc222 chasis cord or plug runs to the front mains doubler board. this small narrow board is located in front of the large main green board. this board is a small narrow circit board behind that main board... on the right of that board there is the main fuse. next to this is the plug that the main cord plugs into

Apr 10, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

I have a 60" RCA D56W02B rear projection TV. I've


Yes,the power supply board,where the actual power a/c cord plug into it,are most of the causes of power LED light blinking problems.

Feb 17, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

I have a 52 in rca hd. the cable man came the other day and brought me a HD box for my tv. I cant find where to connect the HD in the back of the tv. the cord fits the box but I have ideal where to plug...


There should be an HDMI plug in the back of the TV.That is where to plug it .If you don't have that cable then you could use the red green and blue component plugs instead

Feb 14, 2010 | RCA R52WH73 Projection Television

1 Answer

RCA 61 INCH REAR PROJECTION MODEL # P61929 PUSH


The first place to start is the outlet and check to be sure it has power. The next is to check / replace the main internal (to the tv) fuse - it's a 5A 250V GMA fuse (google image of GMA fuse). To find the fuse, unplug the set and remove the back cover of the TV - follow the power cord to where it enters - the fuse is located to the right and slightly ahead of where the power cord is attached to the board.

Nov 08, 2009 | Televison & Video

1 Answer

BIG SCREEN rca d53w19, where are the fuses????


There is one fuse if you look in the rear of the set on the left side follow the power cord as the cord plugs into the Main filter board which has the fuse. Its located right next to the power cord on the right side of that board

May 27, 2009 | RCA D52W19 52" Rear Projection Television

1 Answer

NO POWER AT POWER SUPPLY BOARD EVEN AFTER REPLACING FUSE.


If the mains cord has only 2 pin plug, you can plug it the other way to see if the mains cord has an open circuit at one of the wires. It is not uncommon to find open circuited mains cord for a large appliance like a TV. The degaussing circuit causes a surge in current consumption when you switch on the TV from cold.

Mar 14, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

RCa P52926 52inch


CHECK THE SIMPLE THINGS --MAKE SURE THE PLUG IS STILL PLUGGED IN AC...IF YOU HAD SOME POWER INTERUPTIONS ...MAY HAVE BLOWN THE MAIN FUSE BY THE POWER CORD.DO YOU SEE ANY LED LITES ON THE FRONT OF TV..POWER INDICATOR??? .REMEMBER ,ALWWAY S UNPLUG THE TV IF YOU TAKE THE BACK OFF...TUNICA

Sep 04, 2008 | RCA P52926 52" Rear Projection Television

3 Answers

RCA 52-inch (rear projection) big screen television


tv worked great, turned it off one day and back on the next and the on light would not come on nor would the tv work, rear projection 52 inch rca

Jun 18, 2008 | RCA P52926 52" Rear Projection Television

1 Answer

RCA P46732BA Rear Projection TV


Check fuses first, then check horizontal output transistor and low voltage regulators. Let me know what you discover.

Jan 08, 2008 | Televison & Video

1 Answer

RCA PROJECTION TV MODEL # P46731AT


A short in the PS. Does it blows as soon as you plug in or when you hit power? It makes a different. For more info ctechnicians.com

Jan 07, 2008 | Televison & Video

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

413 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74383 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...