Question about Hitachi 51SWX20B 51" Rear Projection Television

1 Answer

How do I check standby voltage?

I thnk I posted this in the wrong place.


Thank you again for your assistance... It is frustrating for me to ask questions, I know your time is valuable. But the simple troubleshooting you described is not simple to a PC Tech like myself. Here goes... How do I check the standby voltages? I have a voltmeter I use when troubleshooting PC's. I just do not know what the readings should be or where to probe on the TV mobo. Also, what should the readings be when correct or incorrect? Are there any articles at FixYa that I can read for a better understanding of the troubleshooting process? I have searched and searched this site and others but cannot find much of anything that describe how to troubleshoot. If I need to sign up for premium service to compensate you I can do that too. Let me know how I can help you. At this point It sure would be great to push the button and have the TV back. I have no problem paying a Pro to fix it at this point because I just want it working again but, It sure would be a great feeling to know I did it with the help of people like yourself and the internet.
Thank you very much again,
Daniel Shantz

P.S. If you ever need any computer help just email me.

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  • Hitachi Master
  • 8,617 Answers

I would suggest going to the following link if you dont have the service manual as they have the service manual for your set which they email after purchase and then they will provide free tech support with instant messageing that will help you check the proper voltages in the proper way. The manuals are very inexspensive and the tech support is free and its not limitted in any way. They go the distance to help you get the set operating agin.Heres the link check them out.
http://servicemanuals.vstore.ca/

Posted on May 17, 2008

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Red light comes on when turned on goes right off


Check its main power supply output voltages. If standby power voltage is absent, this type of fault can occur. If you wish to get more details, surf the following link. There are over two thousand and four hundred posts. All are related to television and other domestic electronic equipment service help. You can get a solution there. Type in the brand name to your device to its search box, can be located at the top right of the display window. It will make search easy. More than Nine Lakh viewers cannot be wrong.

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9 year old Sony Trinitron TV 27 inch; a red light is flashing "standby, timer"; have tried to cancel this but the TV won't turn on, just hear a clicking sound when pushing the power button


The key here is the number of blinks. The standby light should blink a count followed by a few second pause with the count repeating. That count coupled with the model number will giveme enough information to provide you with a solution. Can you uipdate this with that info please?

Thanks,
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Sep 16, 2008 | Projection Televisions

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When I turn the tv on the power light blinks green a few times then goes red no power. It does this for 15-30 minutes until it stays on, help!!!!


Its main power supply voltage outputs should be checked. Check the standby voltage. If you are not sound in electronics, contact any service tech:
If you wish to get more details, surf the following link. There are over two thousand and four hundred posts. All are related to television and other domestic electronic equipment service help. You can get a solution there. Type in the brand name to your device to its search box, can be located at the top right of the display window. It will make search easy. More than Nine Lakh viewers cannot be wrong.
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Replaced caps on tv worked then I turned off and now green light is flashing non-stop again. What's wrong now ? Please help


You'll have to check your standby voltages and make sure they are present. If they are not then the power supply needs repaired or replaced. Caps, as they are going bad can fatigue a power supply.

Dec 20, 2010 | Mitsubishi WD-62725 62" Rear Projection...

1 Answer

No Audio & Video red light blink continously.


hi first of all u should check ur transistor connections.Check your Horizontal and vertical output transistors.You should also check the horizontal and vertical yoke connections as well as your low voltage regulators.... if any of these got damaged u should purchase a new one.. but try to purchase with the help of a tv service assistant...thank u!!!
rate me

May 29, 2009 | Sony KP-57XBR10 57" Rear Projection...

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My TV remains on standby after following the manual's instruction on turning on the TV. What is the Power Control Setting? And where do I adjust. It appears the TV isn't getting power or I don't know


hi friend,,,
Power Control Setting means nothing that whether the incoming voltage is whether above 240 wats or below it if you have multimeter check it,,,,'
thank u,,,,,,,,
it will be also any burnt resistors problem

May 03, 2009 | Projection Televisions

1 Answer

Sony 50 Wega LCD flashing red light


Hi

How many times is the red light flashing? The number of times the red led blinks means---


  • Continuous blink once a second, no pausing - No reply from the jungle IC301 (data bus is busy, shorted to ground, or held high), IK video path is defective.

  • One blink - not used for the self-diagnosis

  • Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.

  • Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.
  • Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

  • Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.

  • Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206.

  • Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

  • Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401, and 402. On some projection models of Sony TV sets, this code means that T8005 (flyback transformer), or the associative components in the high voltage circuits are defective on the D board.


  • Nine blinks - Replace D 6116 and D 6301 on the "G" board, do not resolder as this will fix the problem temporary. Or Panel Module Error or Thermal Error. If it is intermittent 9 blinks, meaning sometimes the TV comes on and other times you get flashing, then change the switching regulator on the "G" board or check connections. Make sure the regulator is -12 or -13 (negitive).
  • Ten blinks - Check Q8014 and Q8013 for shorts, leakage, or bad solder connections on the " D" board. If the transistors are bad, check R8051 and IC8005, also on the "D" board.
  • No blinks(Unit is dead) - Problem in the standby power section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should show open).
Please do rate this solution as FixYa and revert for further assistance.

Thanks
Rylee

May 01, 2009 | Sony Grand WEGA KDF-50WE655 50" Rear...

1 Answer

Further assistance needed


I just replied you and here once again...

Please pull front speaker grill and find focus block, fixed at corner having 6 control knobs on it.
Find Blue Screen control knob there.
Put your TV in AV mode to get dark screen and just press Display button on remote to have AV display.
Now slightly rotate control knobs counter clock wise until thin lines (retrace) disappear. Job is done and put back speaker grill, press display button again to disappear screen display.

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Tv shuts off sporadically, and now won't recieve any video signal


Check the solder on the vertical output IC this is a common problem and can cause loss of video while sound remains and often will shut the set down with a vertical deflection error

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