Question about Sony KV-27V42 27" TV

4 Answers

KV27S42 dead - 4 blinks

My KV27S42 is dead and red front led blinks 4 times when I plug it or switch ON then stop after 3 cycles (15 seconds). I replaced the IC541 with no success and I noticed that lots of voltages are missing (+13V, -13V, +135V and +200V on PCB A). I can hear the relay RY602 clicking and it supplies the 120VAC. I do not see any short between the +13V and -13V inputs of IC541 (pins 2 & 4) but when the multimeter is set to 20 Ohms, I can see the value increasing slowly, I think it is due to the capacitor between the inputs 2 & 4 of IC541, I did not check with IC541 floating. Resistances R561 & R562 are good with 0.47 Ohms.
I would like to jump the relay RY602 to achieve high voltages to see all functions working normally but it seems that all voltages are removed when the relay RY602 contacts close.
Any idea ?

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  • 6 more comments 
  • Herve Pencalet Apr 02, 2008

    Good info I will try this evening, but I have some questions :

    what is the HOT ?

    I know that the 135V is not there on power up like the other voltages, how can I check IC1751 ?

  • Herve Pencalet Apr 02, 2008

    Good info I will try this evening, but I have some questions :
    what is the HOT ?
    I know that the 135V is not there on power up like the other voltages, how can I check IC1751 ?

  • Herve Pencalet Apr 03, 2008

    I unsoldered IC541 to check for any short and it is not shorted. I checked Q502 and it is shorted on the PCB, I will remove it to make sure it is really shorted, also I want to remove R504 and R505 because I do not read 1 Omh for R505. I have some doubts with T501 (Transformer) as they is no reading on Pin 5 because of Q502 and also on Pins 1 & 3 on T501, what would the values for Pins 1, 3 and 6 ?
    I have some very low voltages on FBT because of bad Q502 (?). I checked good IC501 (152V Pin 3 and 16.8V Pin 4). IC1751 no short on Pins 4 & 6.

  • Herve Pencalet Apr 04, 2008

    thanks for your reply,
    I finally unsoldered Q502 and it shows shorts between base and collector, base and emmitter, emmitter and collector, I am surprised that there is no sign of overheat on the PCB ! also the aera of T501 is clean. I think that I will remove T501 and check it appart.

  • Herve Pencalet Apr 09, 2008

    I replaced Q502, resoldered T501, checked voltages, my TV is now working fine.

    I noticed there was neither thermal compound on Q502 nor the heatsink. I put some.

    Thanks Bobbyj !

  • Herve Pencalet Apr 11, 2008

    I got the same symptoms you described with the vibration. If the circuitry is the same (do you have the shematics ?) go directly to Q502, very easy to test, if Q502 is not shored the power on the TV and check for different voltages (200V, 135V, +/-13V and 5V), they should be indicated on the drawings.

  • Anonymous Mar 04, 2009

    Acquired a KV27S42 and it worked fine. Two hours later after transporting home, it turns on and then off again by itself. The led blinks 4 times. What could have caused the sudden problem?

  • wcripley Mar 28, 2009

    kv27v42 flashing indicator blinks 4 times. First just died. Turned TV back on, worked OK for 20 minutes. Now dead as a hammer.

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I replaced Q502 on my Sony TV (KV27S42). TV started working after replacing Q502. I also used a good thermal compound. But few days later, it went to 2 flashing lights and now 4 flashing lights. Not sure what's causing repeat failure. Can anyone please help?

Posted on Sep 24, 2008

  • suraj990 Sep 25, 2008

    i replaced Q502 on my Sony TV (KV27S42). TV started working after
    replacing Q502. I also used a good thermal compound. But few days
    later, it went to 2 flashing lights and now 4 flashing lights. Not sure
    what's causing repeat failure. Can anyone please help?


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  • 395 Answers

The +13 and -13 are generated by the flyback transformer as well as the 200 volts. the 135 is your B+ voltage and sould be there at start up. check the HOT and the Flyback. if there is no 135v check IC1751 on the C board sometimes if bad it loads down the 135v line. and can give a faulse vertical error.

Posted on Apr 02, 2008

  • 3 more comments 
  • Robert Johnson Apr 02, 2008

    horizontal output transistor (HOT) on IC1751 check for short between pins 4 and 6. pin 4 is grnd and pin 6 is vcc.

    the pin lay out is 1=B in, 2=G in, 3 =R in, 4=gnd, 5= IK, 6=VCC, 7=R out, 8=G out, 9=B out

  • Robert Johnson Apr 03, 2008

    the transistor Q502 will show a short between Base and Emmitter but should not show a short between base and collector or emmiter to collector. if it shows short between either one of these then replace. also check for bad solder on T501 this can cause repeat failure of Q502.

  • Robert Johnson Apr 05, 2008

    T501 should be OK. 90% of the time Q501 fails on it's own. if you notice the transistor is on a large heatsink. the HOT is the most common failure in TVs because it is the hardest working transistor. they don't show heating normaly because of the heatsink. T501 sometimes have bad solder that cause Q502 to fail, just resolder it.

  • Robert Johnson Apr 05, 2008

    I ment Q502 not Q501

  • Robert Johnson Apr 11, 2008

    the vibration is from the deguasing coil as it demags the picture tube it vibrates the appiture grill inside the picture tube. this is normal and only happens at cold startup. all sony trinitron tubes do this and is not appart of the HOT (Q502) circuit.

    onys you gave jaime867 the fixya did you mean to do that?

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I also have the exact same problem but mine is the 27V42....I think the circuity is almost the same. I tried replacing the IC601, IC1751, and IC541 as suggested in some of the posts but to no avail. I'll try to check the Q502 for short between B-C and E-C and possible replace it also. Interestingly, a month before my set died I get a loud vibration whenever I turn on the set. It vibrates the entire TV which last about <1sec but the TV will turn on. Not sure if this had anything to do with the failure.

Posted on Apr 11, 2008

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If you already change IC1751, I would suggest to check IC601 on the power supply just to see if the voltage is getting to T603.
Try to disconnect and isolate lead # 2 from the FBT to be able to measure the voltages in the power supply circuitry.
Download the service manual if you do not have it yet.
Let me know if you need further assistance.

Posted on Apr 02, 2008

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My mitsubishi 46 inch wont turn on, when you click power on green power button light goes off then flashes 3 times


This is not something that I believe the average joe can do aYoiu need to have it serviced. the fix is below and i amn sure you wil then understand why I said get a tech.


Cause #1 1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C).

Jul 31, 2009 | Televison & Video

1 Answer

Help w/ the flashing green light


Good Day;

Cause #1 1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). Good Luck, big IRISH.

Oct 19, 2008 | Mitsubishi WD-52725 52". Rear Projection...

2 Answers

Wd-52525 lamp light not resetting


Good Day;

1. Check for an open AC fuse F9D00, if open check for a short on the 340v line to the lamp ballast between pin 1 an 5 at connector PL on the Power PCB, if shorted replace PWB-POWER LAMP (Ballast) part # 939P978010 and F9D00 part # 283D131040 2. Check for open AC fuse F9D00 part # 283D131040, if open check for proper seating of connector K1 on the Power PCB
Dead unit wd52525 mits

NO POWER

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C) See Service Tip VS-78A 1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). Good Luck big IRISH.


Oct 08, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Replaced Lamp & yellow light indicator blinking. Still no picture


Good Day;
1. Check for an open AC fuse F9D00, if open check for a short on the 340v line to the lamp ballast between pin 1 an 5 at connector PL on the Power PCB, if shorted replace PWB-POWER LAMP (Ballast) part # 939P978010 and F9D00 part # 283D131040 2. Check for open AC fuse F9D00 part # 283D131040, if open check for proper seating of connector K1 on the Power PCB
Dead unit wd52525 mits
NO POWER

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C) See Service Tip VS-78A 1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). Good Luck, big IRISH.

Oct 04, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Red lamp light on


Good Day;

Most likely you have bad caps on the TV's power supply. The following will guide you in the correct direction to properly repair your TV. Good Luck, big IRISH:

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C) .

Sep 11, 2008 | Mitsubishi WD-52525 52" Rear Projection...

2 Answers

Mitsubishi HD1080


Good Day;

You may have a bad lamp. What lights show on front panel? Check this when no come on:

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C) See Service Tip VS-78A .

Good Luck, big IRISH.

Sep 10, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Wd 52725 52" mitsubishi


Good Day;

Bad news this TV has multi problems, check these:

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). Good Luck, big IRISH.

Aug 31, 2008 | Mitsubishi WD-52725 52". Rear Projection...

1 Answer

Mitsubishi WD-52725 52 in


Good Day, danrussell63;

TRY THIS:

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). i HOPE THIS HELPED, BIG irish. back.gif

Aug 13, 2008 | Mitsubishi WD-52725 52". Rear Projection...

1 Answer

Slow blinking red light


Yes you can first try this:. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. 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 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. LED does not stop blinking after 70 seconds of plug in. Disconnect the USB connector from the card reader to the front from the Chassis, if the unit will then boot up replace the Card Reader part # 299P271010. 7. LED does not stop blinking after 70 seconds of plug in. Disconnecting the USB connector from the Card Reader did not help. Suspect the DM PCB part # 934C116002

Sep 11, 2007 | Mitsubishi WD-52525 52" Rear Projection...

3 Answers

TV NO TURN ON


Hello erraez, I would suggest that you first get a schematic for this set (either call the manufacture or go to a sams photofact site and order one). It sounds like you have a powersupply problem, the only way to make sure is to have someone or yourself check the power supply levels to determine what is happening. You will also need a multimeter for this task. If you do not feel comfortable doing this you can lok for a shop on fixya.com or find one in your neighborhood that will look at it and give you an estimate on what is wrong.

Sep 08, 2007 | Mitsubishi WD-52525 52" Rear Projection...

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