Question about Hitachi 53UDX10B 53" Rear Projection Television

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Ballast / Power board

Is their multiple ballasts / power boards. One for each lamp? If so how do I know which one is bad and needs replaced. If I have to replace 3 of them that is pricey at $200 bucks a pop.

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Hello Kreed13,
As I mentioned this TV doesn't use ballast(s), it user CRTs and the time when you need to change one is if the picture looks out of focus of one of the colors.
You might not even need to change it, if it powers up and you can see it lighting up. These CRTs use a liquid coolant inside to keep them cool, that liquids becomes contaminated over the years and will affect the quality of the picture.
This website has a very good info on how to do it.
Why do you think you need to change the CRTs?

Posted on Apr 24, 2008

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Samsung hlp6163w dlp tv not working, new lamp, new ballast, still three blinking lights


If color wheel does not run lamp will not fire----with lamp removed have you looked at the wheel----if not running it will cause almost instant shutdown of lamp and the set.

If the DMD board is bad time for a new set as it is well over 500 .

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My samsung hlr6167w will not power up. It sounds as though the lamp is trying to strike, however it never does come up on a picture. After several minutes, all three lights on the front power cirle (Lamp,...


All three LED lights flashes,u hear alot of clicking sounds too?Yes,ur tv the Ballast board is dead too.This Ballast board job is only to ignite the tv projection lamp only.Replace the Ballast board,should solve this problems.

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I recently replaced the lamp - part # 915P061010. But the TV powers off about every 20 - 30 minutes / red status lamp is illuminated. At times the TV will remain on for hours. But eventually the TV...


It looks like your ballast board is going bad, this is a common problem for DLP TV's the ballast board is the power source to the lamp and if for any reason this board does not send enough energy to the lamp it will turn off, It looks like your ballast it starting to get weak it gathers enough energy to turn on but gets weak again and turn back off you have a new lamp and it requires for the ballast to be working at it's full potential

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My KDS-50A2020 TV has an error code indicating a lamp driver fault (5 red blinks). I replaced both the lamp and the ballast and it still doesn't work. I need further assistance troubleshooting the...


Hello.
Ballast in Sony is one of the most reliable parts, almost never goes bad.
I assume you have TV unplugged from the wall outlet to reset error memory (not to mention that you have to do it anyway during ballast replacement).
I hope you are using good quality lamp, because cheap substitute from E-Bay can cause same problem. Lamp and ballast works as duo and on-board diagnostic system is unable to separate them unless lamp is completely blown (in that case you will have steady "Lamp" LED blinking).
You need to set TV up with back cover removed but lamp door attached (there is switch that prevent TV from working if lamp door is removed). You need to locate large 2-wire connector on ballast and make sure that it's getting about 330V DC from power supply board when you turning your TV on. If it's not there - you have power supply board problem. There should be fuse on it (not on the ballast board but power supply board - just trace those two thick wires where they coming from). That fuse could be blown by previous bad ballast shortage.
Small connector on ballast have 5 pins. Some of them ground, one of them steady 5V and another trigger (turn on signal) 5V. Make sure all voltages are there. If there is no trigger 5V - you have problem with main board.
In my experience 90% cases - it is very bad quality new lamp or something is just not connected (forgot to put plug all the way or something).
Good luck!
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1 Answer

Mitsubishi 52525 TV Red Lamp LED


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5 (GND) pins for the ballast. and the ballast plug CN should also have the 340V with pin 1 of that plug being GND nd pin 3 should have the 340V If the PL plug on the power board is low the power pwb has a problem most likely the doubler circuit. If CN plug voltage is high say 360V the ballast is suspect.

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It keeps shutting off. Anywhere from 2 or 3 times


Could be several things. First replace lamp.Remove lamp door and put it back on making sure tab on door presses door switch downward when closed. Can you heard spinning noise from front. Bad color wheel will cause shutdown. Look at big cap on ballast . iff swollen replace lamp, ballast and power board. Is voltage to ballast from power board below 350 volts if so replace power board. hope this helps. Most common are lamp and door switch in up position rather than downward .

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1 Answer

Samsung hlr5667w that won't turn on. Good lamp and ballast


Any light blink on the front. Whats the voltage to the ballast from the power supply. Common problem on these sets are bad lamp door switch. Try shorting the switch. Color wheel also is problematic but usually will be noisy and cause shut down. Check power board for swollen capacitors. Hope this helps

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No Picture But Sound


I have a HNL5065W samsung that i just repair if it was the lamp you would not get sound,When Lamp goes out set will not come on only Flashing front lights, how long does yours play before cutting OFF? There is a couple of capacitors that will go bad on power board,CK to see if any of the capacitors are puffed up on top if so thats your problem.,But remember Ballast starts up LAMP CK the big capacitor on ballast board and small ones ,also Keep in mind it could be Ballast,if set keeps playing with sound and no picture another thing make sure nothing has come unpluged on DMD board, this board also will keep lamp from firing.OK heres another thing IF COLOR WHEEL is not spinning correctly lamp will not fire up, if it spins to slow or too fast most samsungs start out with Bad Color Wheel.I Buy on E-Bay got My lamp for 85.00 Ballast board 55.00 Ballast board at other companys 117.00 plus shipping! Color Wheel was 65.00.

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2 Answers

My PT-61LCX65 all of a sudden turned itself off and the Lamp indicator LED is blinking once every 5 sec. It will not power up. Can it be the lamp?


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The most coomon is always the lamp. The lamp cannot be tested . The ballast board must be tested by a technician.

The normal operation in this case is replaceing the lamp that cannot be tested. then, if you are within that 2% of the cases with ballast problem you replace the lamp power board or call a technician.

You can find parts here.

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1 Answer

Hd50lpw175x7


Ballast Verification Process
1. Short out door switch (SP001)
2. Apply AC power and wait till DM module boots
3. Press power switch and observe spark gap on ballast
4. If spark gap arcs, suspect Lamp. If color wheel starts but ballast won’t strike
lamp, go to next step.
5. Measure BP252 on AC IN CBA for +300Vdc. If missing check door switch, cable
from AC IN CBA to switch and AC IN PCB. If correct go to next step.
6. Monitor pin 2 of BT251 for Ballast ON command from Light Engine. If present
suspect Ballast. If missing suspect Light Engine. Pin 5 of BT251 starts at 3.3V
after power switch is pressed and drops to .18V when the Light Engine sends the
start command. No change on pin 5 indicates Light Engine is suspect, change
on pin 5 with no ballast start, ballast is suspect.

Note: Lamp may arc but not start. Pin 5 of BT251 is "LAMP LIT" and goes to 1.48V
when lamp is lit. If ballast strikes lamp but lamp won’t stay lit, suspect Lamp.

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