Question about Mitsubishi WS-73711 73" Rear Projection Television

1 Answer

Won't power up - Leakage Test - Mitsubishi WS-73711

I've performed a leakage test by shorting the two prongs of the wall plug then measuring between the plug and metal parts on the TV. All but two of the metal parts (heat sinks, screws, plates...) read >1M ohm. The heat sink on two switching mode rectifiers measure about 20 M ohms. After I plug it in, most of the metal parts measure around 1-10 mV from ground (I don't recall if it was hot or cold ground). The two rectifier heat sinks measure around 26 mV. Would this indicate there is a problem with the rectifiers and should be replaced?

Currently, my Mitsubishi doesn't want to power up. I changed the DM cap's which got rid of the 'blinking green light' problem. However, it still doesn't power up. The error code (12) indicates the TV is operating normally. I removed the front panel power switch board and the on switch measures open/close/open when I depress it. I also checked all the fuses indicated on the inside of the chassis (about 10 of them). I measured the standby voltages from the test points and cold ground (6, 12, 28 and 32). If I remember correctly, I think they were all zero except the 6 volt was 7 volts - I will have to verify this. Tonight I will check the output of the bridge and switching rectifiers. However, I'm not real clear on what voltage they should be. I'm just learning about all this stuff - kind of fun - especially if I get it working!

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  • KariSue Jan 08, 2008

    TV WORKS NOW! I disconnected the front panel cable connector that goes to the power switch. The TV powered up fine using the remote. I need to recheck the power switch. It would appear it is stuck or something. Others have posted this problem keeps the TV from powering up by the front panel button or remote.



    I picked this TV up for free on Craigs List a few days ago. Repair costs will be about $40 and I have a 73" TV that went for $7000 a few years ago. I couldn't have done it without all the great information from these tech support sites. You guys are great! Most important, this monster of a TV didn't end up in the landfill. How rewarding.


  • KariSue Jan 08, 2008

    TV WORKS NOW! I disconnected the front panel cable connector that goes to the power switch. The TV powered up fine using the remote. I need to recheck the power switch. It would appear it is stuck or something. Others have posted this problem keeps the TV from powering up by the front panel button or remote.



    I picked this TV up for free on Craigs List a few days ago. Repair costs will be about $40 and I have a 73" TV that went for $7000 a few years ago. I couldn't have done it without all the great information from these tech support sites. You guys are great! Most important, this monster of a TV didn't end up in the landfill. How rewarding.

  • Anonymous Mar 08, 2009

    Tv won't power up with the remote or the front panel buttons. Pulled power for 12 hrs thinking TV would reset but nothing. What's next.

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Well it sounds like you enjoy checking things, did you check D9A31 part# 264P045050 and R9A33 a 220 ohm 1/4 watt resistor on the PCB? Try this!

Troy

Posted on Jan 08, 2008

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Why does my fuse keep blowing out on pioneer reciver vsx-d606s?


Maybe there could be one set of 2SA1962 pnp and 2SC5242 npn transistors shorted thats what i think inside on the output stage . try to measure for short circuit on every 3 B-C-E base collector and emitter . but rememer to try to find the cause of the shorting. .
if left channel is shorted or right you will have to solder out and replace the defective parts. a variac or make a test unit that you will power the amp over a 200 watt lamp because of the fuse that will bow out again BUT if you have a primary problem in the power supply then measure the bridge rectifier (or 4 bridge diodes) and also the capacitors and also .observe for leakage because that leakage could damaged the electro conductive tracks, and clean the print always after repair.

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Models: WS-B55 / WS-48511 / WS-55511 / WS-55711 / WS-65511
Models: WS-65611 / WS-65711 / WS-65712 / WS-73711


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Would you like to bypass, defeat or reset your Mitsubishi 73711 HDTV Parental V-Chip parental lock? Have you forgotten your V-Chip passcode or password?

If you forget your V-Chip passcode, you can view the locked TV without entering your password.

When your passcode is requested, press the number 9 and the QV button on the original TV remote control at the same time. This process temporarily unlocks your TV.

When you enter the V-Chip Lock menu, pressing the number 9 and the QV button on the original TV remote control at the same time will delete your old password and prompt you to enter a new passcode. Pressing HOME at this time will cancel the entire passcode.

I hope that helps.
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Bypass Mitsubishi WS-73711 Front Lock

on May 05, 2010 | Televison & Video

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Models: WS-B55 / WS-48511 / WS-55511 / WS-55711 / WS-65511
Models: WS-65611 / WS-65711 / WS-65712 / WS-73711


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Would you like to bypass, defeat or reset your Mitsubishi HDTV WS-73711 Front Button lock?

If you have misplaced your remote control, and have engaged the Mitsubishi WS-73711 HDTV Front Button Lock, you can bypass the front button lock by pressing and holding the MENU button on the front panel for more than 8 seconds.

I hope that helps.
________________________________________
Mitsubishi WS-73711 Manual Download
Reset Mitsubishi WS-73711 VChip Password

on May 05, 2010 | Televison & Video

2 Answers

Ground leakage detected device cut the power


Take wires out of plug and the wire from the connecter box of machine. With multi tester test earth to live and earth to neutral. If there is a short circuit it will show on which wire it is. Next disconnect live and neutral wires from motor and run test on all wires. If no short the motor is faulty and test the motor connectors. If the short is not found the motor is not the problem but the control system. Disconnect all wires from controls and test everything isolated and individually.

Apr 16, 2013 | Washing Machines

Tip

Mitsubishi WS-73711 Manual Download


Download Mitsubishi WS-73711 HDTV Manual

Models: WS-B55 / WS-48511 / WS-55511 / WS-55711 / WS-65511
Models: WS-65611 / WS-65711 / WS-65712 / WS-73711

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Have you misplaced your Mitsubishi WS-73711 HDTV Owners Manual?

Would you like a digital, searchable, pdf version of the Mitsubishi WS-73711 HDTV Users Guide?

Follow this link (& click FREE) to download a pdf version of the Mitsubishi WS-73711 HDTV operations manual.

I hope that helps.
__________________________________________
Reset Mitsubishi WS-73711 VChip Password
Bypass Mitsubishi WS-73711 Front Lock

on May 05, 2010 | Televison & Video

Tip

Reset Mitsubishi WS-73711 VChip Password


Bypass or Reset Mitsubishi WS-73711 HDTV V-Chip Password Lock

Models: WS-B55 / WS-48511 / WS-55511 / WS-55711 / WS-65511
Models: WS-65611 / WS-65711 / WS-65712 / WS-73711


952010d.gif



Would you like to bypass, defeat or reset your Mitsubishi 73711 HDTV Parental V-Chip parental lock? Have you forgotten your V-Chip passcode or password?

If you forget your V-Chip passcode, you can view the locked TV without entering your password.

When your passcode is requested, press the number 9 and the QV button on the original TV remote control at the same time. This process temporarily unlocks your TV.

When you enter the V-Chip Lock menu, pressing the number 9 and the QV button on the original TV remote control at the same time will delete your old password and prompt you to enter a new passcode. Pressing HOME at this time will cancel the entire passcode.

I hope that helps.
________________________________________
Mitsubishi WS-73711 Manual Download
Bypass Mitsubishi WS-73711 Front Lock

on May 05, 2010 | Mitsubishi WS-73711 73" Rear Projection...

1 Answer

Timing slipped will it bend intake, exhaust or both sets of valve


First of all, you'll want to perform what's called a 'LEAK-DOWN' test. The assumption you make (regarding Intake versus exhaust) is irrevelant. Interferrence is BOTH intake and exhaust valve clearances. A leak down or "cylinder leakage" test is similar to a compression test in that it tells you how well your engine's cylinders are sealing. But instead of measuring pressure, it measures pressure loss.
A leak down test requires the removal of all the spark plugs. The crankshaft is then turned so that each piston is at top dead center (both valves closed) when each cylinder is tested. Some people start with cylinder number one and follow the engine's firing order.
A threaded coupling attached to a leakage gauge is screwed into a spark plug hole. Compressed air (80 to 90 psi) is then fed into the cylinder. You don't have to use that much pressure... you can use 30 psi... percentages are the same.
An engine in great condition should generally show only 5 to 10% leakage. An engine that's still in pretty good condition may show up to 20% leakage. But more than 30% leakage indicates trouble.
The neat thing about a leakage test (as opposed to a compression test) is that it's faster and easier to figure out where the pressure is going. If you hear air coming out of the tailpipe, it indicates a leaky exhaust valve. Air coming out of the throttle body or carburetor would point to a leaky intake valve. Air coming out of the breather vent or PCV valve fitting would tell you the rings and/or cylinders are worn.
A leakage test can also be used in conjunction with a compression test to diagnose other kinds of problems.
A cylinder that has poor compression, but minimal leakage, usually has a valvetrain problem such as a worn cam lobe, broken valve spring, collapsed lifter, bent push rod, etc.
If all the cylinders have low compression, but show minimal leakage, the most likely cause is incorrect valve timing. The timing belt or chain may be off a notch or two.
If compression is good and leakage is minimal, but a cylinder is misfiring or shows up weak in a power balance test, it usually indicates a fuel delivery (bad injector) or ignition problem (fouled spark plug or bad plug wire). These are not ABSOLUTE conclusions -- each assumption must be VERIFIED before concluding anything. You mentioned "the lifters seem to be collapsed."... Did you VERIFY this? Since you KNOW the engine is OUT - OF - TIME because you KNOW the timing belt has SLIPPED, then you know you must PUT IT BACK IN TIME... right?...before you can continue diagnosis.... right? Otherwise, what are you MEASURING?

Jun 24, 2009 | 2005 Hyundai Elantra

Tip

Bypass Mitsubishi WS-73711 Front Lock


Bypass Mitsubishi WS-73711 Front Button Lock

Models: WS-B55 / WS-48511 / WS-55511 / WS-55711 / WS-65511
Models: WS-65611 / WS-65711 / WS-65712 / WS-73711


952010d.gif



Would you like to bypass, defeat or reset your Mitsubishi HDTV WS-73711 Front Button lock?

If you have misplaced your remote control, and have engaged the Mitsubishi WS-73711 HDTV Front Button Lock, you can bypass the front button lock by pressing and holding the MENU button on the front panel for more than 8 seconds.

I hope that helps.
________________________________________
Mitsubishi WS-73711 Manual Download
Reset Mitsubishi WS-73711 VChip Password

on May 05, 2010 | Mitsubishi WS-73711 73" Rear Projection...

Tip

Mitsubishi WS-73711 Manual Download


Download Mitsubishi WS-73711 HDTV Manual

Models: WS-B55 / WS-48511 / WS-55511 / WS-55711 / WS-65511
Models: WS-65611 / WS-65711 / WS-65712 / WS-73711

952010d.gif

Have you misplaced your Mitsubishi WS-73711 HDTV Owners Manual?

Would you like a digital, searchable, pdf version of the Mitsubishi WS-73711 HDTV Users Guide?

Follow this link (& click FREE) to download a pdf version of the Mitsubishi WS-73711 HDTV operations manual.

I hope that helps.
__________________________________________
Reset Mitsubishi WS-73711 VChip Password
Bypass Mitsubishi WS-73711 Front Lock

on May 05, 2010 | Mitsubishi WS-73711 73" Rear Projection...

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