Question about RCA HD50LPW175 50" HDTV

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ATC336 Power Supply Issue?

Have you seen this power supply problem mistaken for a bad DM3x module? My set comes on, then a solid LED front panel for a few seconds, five blinks, then solid again. Occassionally it will blink 5 more times a couple minutes later, but I think that's just telling me the same issue. The LED is unresponsive the entire time too - must unplug to turn off. Fans, nor the color wheel try to spin. From what I can see, nothing beyond a red light coming on within the DM3x is going on. I don't think the tv is getting anything past the DM3x modue, but I still think it could be the power supply. I'm going to remove my power supply hopefully within the next couple days and check the caps you've suggested. I've done plenty of solder work on small electronic components, but nothing like this yet. I think my biggest issue is going to be locating the new caps. You said they can be purchased at Radio Shack, what exactly am I looking for? Thanks so much for your time, and any other advice you have.

Ben

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  • RCA Master
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You can get the capacitors at the following link just leave them a email indicating that you need the capacitors for the ATC336 power supply and they will get back to you quickly, they have the high temp capacitors in stock.
Here is the link
http://servicemanuals.vstore.ca/

Posted on Jul 10, 2008

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HP Designjet 500 has a locked screen. I have been trying to get the plotter to run on our new computer and it locked up after installing the current Firmware and driver updates. Any suggestions would be...


Dear Friend, It's a serious issue what I understood & confusion is control panel locking facility not avail in this model, how its locked?.. Simple method to catch the faulty part through power LED behaving s..(Power led located on power button)

# LED is OFF - This indicates that the Power Supply Unit is
completely dead. Try the following:
1 Check that power cord is connected correctly to the Printer and to the Power Socket.
2 Replace the Power Supply Unit
# LED is ON (all the time) - This indicates that the Main PCA is completely dead. Replace the Electronics Module
# LED is Flashing - A problem has been detected with the previous firmware upgrade. Try re-send the firmware upgrade file.
# LED Flashes twice every few seconds - The Printer cannot detect the Interconnect Cable. Try the following:
1 Check that the Interconnect Cable is connected correctly to the inter connector PCB & Electronic module.
2 If the Interconnect cable is connected correctly and the LED continues to flash twice then replace the Interconnect Cable
LED Flashes 3 times every few seconds - The Printer cannot
detect the Front Panel. Try the following:
1 Check that the Front Panel is connected correctly to the Interconnect PCA.
2 If the Front Panel is connected correctly and the LED continues to flash 3 times then replace the Front Panel
LED Flashes 4 times every few seconds - This indicates that the Electronics Module has failed. Replace the Electronics Module
LED Flashes 5 times every few seconds - This indicates that the Electronics Module has failed. Replace the Electronics Module.
Now U decide that whether firmware uploaded properly or not?..if not its sure that Electronic module gone.. you have 2 replace it..
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Red light lit on front panel indicating a bad lamp


It'll likely be right behind where the power cord from the TV comes from.

Dec 07, 2007 | Mitsubishi WD-52525 52" Rear Projection...

Tip

Power supply repair for ATC 336 chassis HD50LPW175


I have seen quite a few of the ATC336 have dead capacitors in the power supply preventing start up . The capacitors in question are CP647, CP624, CP639 and CP641 all were bad. Replaced these capacitors and the sets powerd up and operated

on Feb 23, 2008 | RCA HD50LPW175 50" HDTV

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This model is equipped with a keyboard lock feature; this can be mistaken as a no power condition. To unlock the keyboard press and hold the "menu" button on the front panel for 10 seconds. 2. (Power LED may be on after plug in) check for no less than 4.4 volts DC at pin 3 of PC9A21 on the Power PCB, if low or missing replace PC9A21 part # 268P058020. Hope this helps if not let me know and I will go further

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1 Answer

The tv is completely dead. i check the power supply everything checks out ok, there is only 2.5 volts coming out of the supply module. the input of the computer module has the same voltage 2.5...


there may be some bad capacitors in the primary of the power supply. do you get any led lights the front? most polaroids will have a red led on the front if the standby supply is good. there will most likely be some smaller caps 47mf@50v 10mf@50v probably that value that are bad.

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Power Issue


Now,u plug in the tv u get a solid red standby power red LED light in the front of the LCD panel right?When u push the power button on the remote u hear a clicking sound?Only one clicking sound,not the power supply board problems.It the Tuner board problems.But u can make sure it the power board problems or not.By taking the tv aparts check the power board,that board where the a/c power cord goes into it.Look all around the power supply board check for these leakage capacitors,they alway bulges up it top or puff up it top.No bad leakage capacitors,then it not the power supply board problems.

May 14, 2010 | Haier HLH406BB 40 in. LCD HDTV

1 Answer

NO PICTYURE OR SOUND LIGHGTS ON FRONT COME ON BLINK FIVE TIMES THEN GO OUT


Thats a common problem with the RCA ATC336 Power supply when the capacitors fail on the AC in power board. You can get the repair kit at the following link which will usually repair that symptom.
http://servicemanuals.vstore.ca/product_info.php/pName/rca-atc336-dlp-power-board-repair-kit/cName/repair-kits

May 23, 2009 | RCA HD61LPW175 61" Rear Projection HDTV

1 Answer

Power Problem


usually blink code on front gives direction but first thing to do would be to determine if surrounding sustain boards are causing draw on power supply by disconnecting them one at a time from power supply. y is on left looking from back and x is on right looking from back. if led goes solid with either board disconnected check supply voltages and if come up and stay up replace that board. if no change then you would need to verify vs on command coming from logic main to power supply. should be labeled on power supply connector and should be 3 volts. if present replace power supply if not present verify if logic main board sitting underneath signal board has one solid and one blinking led on if verifying normal operation and if so replace small signal board

Aug 15, 2008 | Philips 42PFP5332D 42 in. Plasma...

1 Answer

ATC336 Power Supply


Yes the symptoms of bad capacitors on the Power supply can mimic the symptoms of a failed DM3. Its alot better to try the capacitor change first, as they are a common source of failure and the price of the DM3 is very exspensive.

Jul 10, 2008 | RCA HD50LPW175 50" HDTV

6 Answers

Philips 42PF7320A/37 won't power up Led blinks 7 times


This what to do measure from the logic board which is located under the small signal board and have the AV jacks connected to it. If the voltage is 3.1 or close the problem is with the power supply or a boar connected to the power supply. Unplug the set. Disconnect the Y main board first that will be on the left side of the set facing the back. Plug the set back in if the led is solid replace the Y main and the Y upper lower. If still blinking plug the Y main back in and unplug the X main which is on the right side facing the back. If the led is green replace the X main. If the led is still blinking replace the power supply.
But if the volts are 0 the problem is the SSB or the logic board. In that case take the (SSB) small signal board out the set and place 1 jumper on J8003 and another jumper J8004 of the left side of the power supply. Then place 1 jumper on CN2072 of the lower left part of the logic board. Plug the set back in if the set displays a white, blue ect screen replace the SSB. If not and on the logic board you don't have 1 solid blue led and 1 blinking led data is not flowing and change the logic board.

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