Sony kp51ws520 hdtv error codes

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pnjkimbro
pnjkimbro's picture
Sony kp51ws520 hdtv error codes

I have a sony kp51ws520.  I am getting nine blinks on the error code.  I have had several people come look at it.  I am getting so many different responses from so many different people.  I have a friend who said he would repair it for me if I could diagnos the problem.  I have tried putting it in service mode, when it comes on, I get alot of zeros and ones.  I have a bet going with my husband, that I can get it fixed before he can, come on guys, help me here.  thanxs:)

MOtvGuy
MOtvGuy's picture
There are a couple little

There are a couple little diodes on the G board most likely causing the problem. Sorry, I don't have the ref #'s but there aren't many parts on that board to begin with.

It's the board on the far left.  

Larry Dillon
Larry Dillon's picture
Ok MotvGUY is correct about

Ok MotvGUY is correct about the G board being bad.  The G board part number is A-1054-157-A.  My supplyers say this board is no longer available from Sony, BUT wait!  I did find rebuilt boards available at a place called PTS electronics.  They are located HERE, and the phone number is 1-800-844-7871.  You can call them and give them the part number you need and they can help you.  Also if you are going to go into the service menu, please write down anything you change as you might need it later if something messes up/  Also you should really have the complete service manual if you are going into the service menu, I happen to have a copy if you wish to have it, I will be happy to share it with you if you leave an e-mail address so i can send it.  This file is huge so I have to use pando to send it as my mail service cannot.  Before you download the manual go to pando.com for a free download and pando only opens when you try to send large files.  Now there is a possibility that this will not fix the set, as no one can really tell for sure if diagnoising it this way.  Good Luck with this repair, and keep us informed of the progress with this contest. 

pnjkimbro
pnjkimbro's picture
Larry Dillion, I do have

Larry Dillion, I do have Pando, me email is pnjkimbro@yahoo.com Please send me the service manual.  As for the contest, he is pissed because he couldn't even get a direct answer from anyone.  Together maybe I can one up him in our gender wars.

Larry Dillon
Larry Dillon's picture
pnjkimbro, I just mailed you

pnjkimbro, I just mailed you the service manual.  So far you are about 25 bucks ahead!  Let me know if you need any more help and what you find out.

pnjkimbro
pnjkimbro's picture
Larry Dillon, I am having

Larry Dillon, I am having problems with my Pando.  I had to re download.  Will you please re send me the service manual for the sony tv.

bgreer08
bgreer08's picture
Larry Dillon said: Ok MotvGUY

Larry Dillon said: Ok MotvGUY is correct about the G board being bad.  The G board part number is A-1054-157-A.  My supplyers say this board is no longer available from Sony, BUT wait!  I did find rebuilt boards available at a place called PTS electronics.  They are located HERE, and the phone number is 1-800-844-7871.  You can call them and give them the part number you need and they can help you.  Also if you are going to go into the service menu, please write down anything you change as you might need it later if something messes up/  Also you should really have the complete service manual if you are going into the service menu, I happen to have a copy if you wish to have it, I will be happy to share it with you if you leave an e-mail address so i can send it.  This file is huge so I have to use pando to send it as my mail service cannot.  Before you download the manual go to pando.com for a free download and pando only opens when you try to send large files.  Now there is a possibility that this will not fix the set, as no one can really tell for sure if diagnoising it this way.  Good Luck with this repair, and keep us informed of the progress with this contest. 

Larry can you send a service manual

Dave IRE
Dave IRE's picture
pnjkimbro,  have you resolved

pnjkimbro,  have you resolved the problem on your sony kp51ws520 yet?  If so, was the problem on the G board like MotvGUY suggested?

I am working on an identical set at present with about the same symptoms. However, I only have a raster for a few seconds before the set shuts back down so the only error codes I can see are the red LED flashes from the front panel.

I'll let you know what I find when I find it!

Dave IRE

Larry Dillon
Larry Dillon's picture
DAVE IRE, how many times does

DAVE IRE, how many times does the light flash?  The first few pages of your service manual has the codes and what they mean.

Dave IRE
Dave IRE's picture
Larry Dillon,

Larry Dillon,

Thanks for the inquiry;  for some reason I could not access this forum yesterday and so could not respond to your question.  The LED flashes exactly 10 times, and I gather from the service manual that this indicates trouble in the horizontal flyback circuit.  Since I do get a raster for a few seconds, I cannot say for sure that the HV xfmr or it's driving semiconductors are for sure bad.  One clue is that the projection tubes output gets momentarily brighter just prior to shutdown.  Maybe the B+ supply is running too high, triggering the shutdown circuit?  Anyone have case history on this symptom?  I hate to shotgun the circuit as Sony parts can be pricey..

Your thoughts?

Dave IRE

Larry Dillon
Larry Dillon's picture
Check and monitor the power

Check and monitor the power supply voltage, make sure it is steady before it goes off. I have seen these voltages start to go up amd down a bit, mostly with scene changes before it shuts down.  Could also be in the HIgh Voltage regulation.

AJS
AJS's picture
Hello

Hello

I have the same problem with my set with 9 blinks and I was wondering if someone can tell me where to find these two diodes.

thanks

Larry Dillon
Larry Dillon's picture
Nine blinks - Replace D 6116
  • 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 (negative).  The G board part number is A-1054-157-A.  My suppliers say this board is no longer available from Sony, BUT wait!  I did find rebuilt boards available at a place called PTS electronics.  The phone number is 1-800-844-7871 Good Luck and let us know how you made out with this repair.  Oh by the way, here are the diode part numbers and generic part numbers, and they can be purchased at www.partstore.com
  • REF. NO.      SONY PART NO.            DESCRIPTION         GENERIC PART NUMBERS
              D6116         8-719-081-97                 DIODE                        MMDL914T1
              D6301         6-500-567-21                 DIODE                        10ERB20-TB5
  • Dave IRE
    Dave IRE's picture
    Update to my last post:

    Update to my last post:

    Noticed the blue tube was the tube which brightened just b/4 the set kicks out, so I disconnected the driver board from the socket of this tube and refired the set. this time the high voltage stayed on and the red & green tubes lit and stayed on.  The blue tube had a bad spot on the phosphor already, so a new driver board and tube has been ordered.

    Dave IRE

    Stevetopia
    Stevetopia's picture
    Hi Larry I'm having the 9

    Hi Larry I'm having the 9 blink problem as well and was wondering if you could email me the service manual. stevetopia@gmail.com thanks!

    Larry Dillon
    Larry Dillon's picture
    Dave, all you need is a new

    Dave, all you need is a new tube, not the driver board.

    Larry Dillon
    Larry Dillon's picture
    steve,

    steve,

  • 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 (negative).  The G board part number is A-1054-157-A.  My suppliers say this board is no longer available from Sony, BUT wait!  I did find rebuilt boards available at a place called PTS electronics.  The phone number is 1-800-844-7871 Good Luck and let us know how you made out with this repair.  Oh by the way, here are the diode part numbers and generic part numbers, and they can be purchased at www.partstore.com
  • REF. NO.      SONY PART NO.            DESCRIPTION         GENERIC PART NUMBERS
          D6116           8-719-081-97                 DIODE                       MMDL914T1  No longer available
  •  New D6116   8-719-074-43                 DIODE                       BAS316-115
          D6301           6-500-567-21                 DIODE                      10ERB20-TB5
  • Dave IRE
    Dave IRE's picture
    Larry,

    Larry,

    Well, the set is back together and operational again.  Nice bright picture.  I figured that for the low cost of the driver board, I would change it anyway, since I didn't really know whether it had a problem or not.  I am not used to CRTs that have an internal problem of excessive or uncontrollable cathode current but maybe this is not too unusual for this particular tube.

    A really scary scenario with this set would be a problem on the signal board and the prospect of either buying a replacement for big bucks or trying to replace one of those ICs. (shudder)

    Anyway, all's well that ends well!!

    Dave 

    ghinson
    ghinson's picture
    I debated creating a new

    I debated creating a new thread since my model is slightly different, but it seems like this might still be a good place to bring it up. I have a model KDP-51WS550 that is on the fritz. Upon power up, I hear sound but see no picture. After 15 seconds, it powers down and I get one of two blinking codes. Most of the time I get 5 repeating flashes. Occasionally I get 10 repeating flashes. Any help would be greatly appreciated. If anyone has a copy of the service manual to send me, that would be great too.

    I have found this online as an explanation for 5 blinking lights:

    Diagnosis: White balance failure (Not balanced) Possible causes: Video out (IC7101, 7201, 7301) is faulty (CR, CG, CB board), CRT drive (IC309) is faulty (A board), G2 is improperly adjusted. Symptoms of the problem: No raster is generated, CRT cathode current detection reference pulse output is small.

    But I haven't found anything for the ten lights (and I am not talking about the 10 or so flashes you see when you initially turn on the set). 

    My problem is that I am three hours away from an authorized service center and this set is already the size of my Wrangler. If I can fix it, I want to do so.

    THANKS!

    Sonygirl
    Sonygirl's picture
    Larry,

    Larry,

    How do I replace D 6116 and D 6301 on the "G" board?

    Thanks

    Larry Dillon
    Larry Dillon's picture
    Dave, great to hear!  I know

    Dave, great to hear!  I know this is a scary thing, as those tubes have around 32,000 volts on them. Not a place to be experimenting around in. Good Luck

    Larry Dillon
    Larry Dillon's picture
    Sonygirl, these diodes are

    Sonygirl, these diodes are soldered into the printed circuit board and is  or should not be attempted unless you have some printed circuit board experience. Not only could you tear up the printed circuit board, you could get seriously hurt if not killed by experimenting around inside of a TV set. Please seek the assistance of a pro or at least someone who knows how to work on TV sets. Good Luck

    pnjkimbro
    pnjkimbro's picture
    Larry,MotvGuy, and all who

    Larry,MotvGuy, and all who helped.  This is Jennifer, the one who originally started this thread.  All you guys have been fabulous.  I did some studying, figured it out, took the g board out, found the diodes, took it to a tv repair man, told him what I needed done, he did it and might I add was impressed I knew what I was talking about, and only charged me fifty bucks for the part and to put in the diodes.  It fixed the problem and I won the bet.  My husband thought it was some big thing.  I think I actually got some respect out of him now.  I also found out that the particular diodes that were originally put in this model set are faulty.  Sony has tweaked the problem, renamed the diodes under another part number.  I don't have the updated number, but could get it if anyone needs it.  Ive got a big head now.  I want to fix my dishwasher.  Thanks so much.

    Larry Dillon
    Larry Dillon's picture
    Jennifer, I am glad you

    Jennifer, I am glad you repaired the TV set. Here is a little tidbit I left in another thread abd then i will make this as the answer that fixed your set as well. Thanks for the kind words. :>)  The D6301 has a Sony part number as 6-500-567-21 with the generic number being, 10ERB20-TB5, and the D6116 has a Sony number of 8-719-081-97, but that number is no longer available from Sony . Sony does however have a direct replacement for the D6116 diode. The new part number is 8-719-074-43, and the generic part number for D6116 is BAS316-115. Remember, do not get cheap and only replace one at a time as re soldering will give you the symptom that the set is repaired, but you will be in the same boat week or two down the road. I have just given you all the right info you will need to successfully repair your TV set. Now it is up to you if you will use it properly.  Good Luck.

    gmlarson
    gmlarson's picture
    larry,

    larry,

    could you please send me the service manual.

                     west9622@hotmail.com
     

    kinman
    kinman's picture
    Larry Dillon said: pnjkimbro,

    Larry Dillon said: pnjkimbro, I just mailed you the service manual.  So far you are about 25 bucks ahead!  Let me know if you need any more help and what you find out.

    Larry, Is there any way you could send that Manual to me as well ( jason@abouttheink.com ). I am getting 10 blinks on start up, followed with 9 blinks, and it continues to cycle 9 blinks. I am assuming that I have the G-board problem (it seems that this is an issue with these models). I have contacted PTS and they will rebuild my board for $135.00. I would like to make sure this is my issue first though. Thank you in advance.

    zapdbf
    zapdbf's picture
    All the manual will tell you

    All the manual will tell you is that a 9 blink is a zero crossing error. it does not tell you how to fix this problem . There is no test for it either, i went through this with sony before when initally trobleshooting this issue. The diodes will even check good.  the ten blinks before is not a code, it is just telling you it is trying to start up, only after that startup notifacation is when you get the code. Replacing these diodes will fix most of thes tv's with this problem.

    Larry Dillon
    Larry Dillon's picture
    Man 135 bucks for a couple of

    Man 135 bucks for a couple of 5 dollar diodes. MM maybe I am in the wrong part of this repair biz? LOL

    zapdbf
    zapdbf's picture
    Larry, that "G" board is a

    Larry, that "G" board is a little bit of nothing(if it is the one I am thinking of), it has a transformer on it and about a dozen or so components. You could replace all the components on that board for less than 50 bucks probably.

    primo
    primo's picture
    Larry Dillon said: I could if

    Larry Dillon said: I could if I knew where to send it?

    Larry,  kindly also send me a copy of the kp51ws520 service manual to jlaudz@yahoo.com

    I have intermittent 9 blink and can not figure it out.

    Thanks in advance.

    jlaudz

    Larry Dillon
    Larry Dillon's picture
    Jlaudz,  Replace D 6116 and D

    Jlaudz,  Replace D 6116 and D 6301 on the "G" board and do not attempt to resolder them as this will fix the problem only temporary.  The G board part has the part  number of A-1054-157-A.  My suppliers say this board is no longer available from Sony, BUT wait!  I did find rebuilt boards available at a place called PTS electronics. They cost about 135 bucks though. The phone number is 1-800-844-7871  If you can solder and work on solid state circuit boards, you can locate BOTH diodes on the "G" board and replace BOTH at the same time. i will send you out the service manual. Good Luck and let us know how you made out with this repair.  Oh by the way, here are the diode part numbers and generic part numbers, and they can be purchased at www.partstore.com

  • REF. NO.      SONY PART NO.            DESCRIPTION         GENERIC PART NUMBERS
          D6116           8-719-081-97                 DIODE                       MMDL914T1  No longer available
  •  New D6116   8-719-074-43                 DIODE                       BAS316-115
          D6301           6-500-567-21                 DIODE                      10ERB20-TB5
  • AlteredsEgo
    AlteredsEgo's picture
    So I am having kind of a

    So I am having kind of a similar issues with my girlfriend's grandparent's TV, and now I am somewhat confused and looking for some advice on what to do next. About a month ago their TV started having issues turning on, and it would flash an error code. It seemed to at some points flash 10 times, and at others 9. I located the service manual for their tv (KP51WS520) and looked up what would cause those particular codes. The manual recommended that I replaced 2 diodes (D6116 and D6301) on the G board for the 9 blink error, and it recommended that I replace 1 IC (IC8005), 1 resistor (R8051), and 2 transistors (Q8013 and Q8014). Since I was getting both error codes I decided it was best to deal with everything at once, and so I went and located the parts I needed from a supplier in malaysia. I received the parts earlier this week and tonight I installed them on their respective boards. Now the TV powers on (you can hear the power supply click on) and you hear audio coming from the TV's speakers, but the guns never power up, and within 5 seconds the TV turns itself back off. Now I am fairly certain that the G board is operating fine, (I measured the power output, and it was outputting around 335 volts to the D board) but the D board seems to refuse to initialize. Also I am still getting 10 blinks at the initial start up, followed by 5 blinks. Does anyone have any sort of recommendation of where to go from here? (I had thought that possibly one of the parts I installed on the D board might be bad, and next time I get a chcance I will test those parts more thoroughly.) Thanks in advance for any help that any of you might be able to provide.

    Larry Dillon
    Larry Dillon's picture
    First off, make sure you

    First off, make sure you installed all of the parts correctly. Triple check the solder connections and make sure you did not splash any solder onto the board. Next, triple check by hand, not just by looking, every single plug on or around the G and the D board and make sure that they did not come out a little and not seated all the way down onto the board. I cannot count how many sets I have repaired in the past from others who swore they checked all of the plugs, but I found one out of it's socket part of the way. Good Luck

    AlteredsEgo
    AlteredsEgo's picture
    I am fairly certain that my

    I am fairly certain that my solder work is good their was only one piece (Diode D6116) that was surface mount the rest of the stuff was hole mounts, and then I went through with my multimeter and made sure that the solder I laid down was connecting with the next solder point.  (I am using some really fine silver bearing solder, and I was pretty careful, so I dont think their were any points where I could have splashed something on the board.) I know the board is of a multilevel design, but I am fairly certain that everything is soldered properly. I went throught and checked all the connectors, and they are all labeled on the breadboard either through silk screening or color coding on the plugs, so I am fairly certain everything is going to the right place.  I pressed down firmly on every single connector to make sure it was seated properly. (Especially those bridging plugs that go from the A board to the D board.)  I really wish their was a light or something to let me know that thing was getting power, because it is so odd for it not to do anything. BTW thank you for the response, and for any help you might be able to provide.

    On a side note I can only work on the TV when I see my girlfriend, which is about once a week, and  it would be nice to look at it at home where I have better lighting conditions.  how do you disconnect the HV wiring, and how hard is it to put things back in place?  I tried twising like they said in the manual, but I am afraid of twisting too hard and breaking something, and then not being able to fix it back. I figure there is some trick I do not know to it.

    Also when I am done working on the TV is there anything I have to do to reset the new IC I installed, or any simple procedure that I may not know about.  I have worked on several TVs in the past, and this is the first one that has really given me fits. (It is coincedentally the first sony I have worked on too, and hoepfully it will be the last.)

    Dave IRE
    Dave IRE's picture
    If you need to work on that

    If you need to work on that set at home and don't want to transport the whole thing, take the whole top section with mirror off and leave it behind.  Don't touch the mirror.  The bottom section with all other components is fairly easily transported in a van or larger car trunk.  At the shop location, rig up a piece of white posterboard or drywall hanging from the ceiling (slanted) to shine the raster on.  Trying to take it apart and reassemble again is not really feasible.  HV leads will usually come out with a push-and-quarter turn, but you gotta be patient..

    After you have worked on a few hundred or thousand tvs, you will still be getting "fits" from time to time!  Oh well..   better aggravated than bored, huh? 

    tinmandave
    tinmandave's picture
    Larry,I was reading the post

    Larry,I was reading the post between you and pnjkimbro, I have the same problem with 9 blinks with my Sony KP51WS520.I took the back off the set and I am relatively sure that the G- Board is the one on the far left. However I don't have the service manual and I have little experiance with this kind of work. It doesn't look like it would be too complicated to remove this board. Would you recomend taking this board out and taking it to a service tech and get them to replace the diodes that you refer to?

      On a different web site someone advised me that you can get the set to turn on by putting it in a self diagnostic mode,by pressing a sequence of buttons on the remote. This works and the set comes on and works fine except that you can't get this display of diagnostic codes to go away.Is there any way to do this? The codes are all zeros except # 9 which reads  9: ZCD   255

     Thanks in advance for any help you can provide Also could you send me the service manual for this set?    tinman36@yahoo.com

    Larry Dillon
    Larry Dillon's picture
    nine is the number od the

    nine is the number od the fault. The ZCD is Zero Crossover detection. Yes the TWO diodes should be replaced.

  • REF. NO.      SONY PART NO.            DESCRIPTION         GENERIC PART NUMBERS
          D6116           8-719-081-97                 DIODE                       MMDL914T1  No longer available
  •  New D6116   8-719-074-43                 DIODE                       BAS316-115
          D6301           6-500-567-21                 DIODE                      10ERB20-TB5
  • If you can solder and work on solid state circuit boards, you can locate BOTH diodes on the "G" board and replace BOTH at the same time. i will send you out the service manual. Good Luck and let us know how you made out with this repair.  Oh by the way, here are the diode part numbers and generic part numbers, and they can be purchased at www.partstore.com

    zapdbf
    zapdbf's picture
    You are correct about the

    You are correct about the service mode. The shutdown is artificially triggered by the micro processer. the zero crossing detector is not working, what this does is is senses when the ac line voltage is a zero volts, at this point is when the tv will turn on, if this sensor is not working then the set will refuse to turn on and you get a 9 blink. When you are in service mode it will ignore this warning. And allow the tv to come on. Sony believes that when turning on the set if the voltage is at zero it is less shock there by extending the life of the set. There is no way to override this. it has to  be fixed. Kind of like the oxygen sensors on the new cars, if the cadlidic converter is no longer operating correctly your car will shut down, i had this problem with my Yukon. So in your case, the reality is the tv is fine, it just can't sense the zero crossing. The problem is usually the diodes. A service manual will not tell you how to change these parts.

    tinmandave
    tinmandave's picture
    Larry & zapdbf, so will the

    Larry & zapdbf, so will the service manual explain how to go about removing the G-board? I don't want to try to take the board out and end up screwing something else up.  I figure it would be my best option to just take out the board and take it to a service center. If I have someone come out they will charge me $120.00 before they even touch the set. Once you get it to come on in the service mode is there any way to clear the screen of the box with all the service codes,if this were possible I could just continue to turn it on in this manner,since there isn't really anything wrong with the set. Thanks again for any help you can provide.

    zapdbf
    zapdbf's picture
    no you can't clear the

    no you can't clear the service codes, that is the purpose of the service mode. There is no direct instructions on how to remove the g board, these manuals are printed up for professionals and they assume you know the basics, but the manual will give you an overview of removal, but there are just a few screws, and a couple of clips along the edge, all the wires unclip from the board. Most sony plugs have a clip you need to press in to remove the plug, but not all plugs will have clips on the older units.

    tinmandave
    tinmandave's picture
    zapdbf thanks for the answer

    zapdbf thanks for the answer and advice, I took a look inside and I can see what you are refering to. There are 2 small screws as well as a couple clips. So if I take the board out and take it to a tech and explain the problem with these diodes will they know which diodes to replace. It looks like there are more than just 2 diodes on the board.  

    tinmandave
    tinmandave's picture
    Larry, I didn't receive the

    Larry, I didn't receive the service manual for my Sony KP51WS520 If you could send this I would be very grateful. Would you recomend ordering these 2 diodes from The source you mention Thepartsstore.com

    Larry Dillon
    Larry Dillon's picture
    It is the partstore.com, and

    It is the partstore.com, and yes use the original numbers I mentioned. I will send out the manual again.

    tinmandave
    tinmandave's picture
    Thanks Larry I got the manual

    Thanks Larry I got the manual. Now that I have gotten the set to come on by using the diagnostic mode that is the only way I can get it to come on at all. So do you think it is most likely these 2 diodes that are causing the problem?

    Larry Dillon
    Larry Dillon's picture
    Yes it is, I have done this

    Yes it is, I have done this repair many many times.

    tinmandave
    tinmandave's picture
    Larry,  I took the G-board

    Larry,  I took the G-board out and I have someone who can do the solder work for me. I'm a little unsure what you meant when you said " Replace D 6116 and D 6301 on the "G" board and do not attempt to resolder them as this will fix the problem only temporary". Do you mean to not try to resolder the old diodes or to not try to just replace one of the diodes. How can you replace these 2 diodes without soldering them in ?  Thanks again for all the help.  Dave K.

    Larry Dillon
    Larry Dillon's picture
    No, what I mean is that if

    No, what I mean is that if you DO NOT replace the diodes and simply RESOLDER the diodes, the set might work for a short time. I have seen peeps do this all the time and think that the TV set is repaired and that the diodes must have had a simple bad connection on them. This is simply not the case. heating upm the diodes sometimes fixes the diodes for some reason. YOU MUST REPLACE THE DIODES. And yes that will involve unsoldering the old diodes, taking  OUT of the circuit board, and replacing them with the NEW diodes.

    zapdbf
    zapdbf's picture
    Larry Dillon said: No, what I

    Larry Dillon said: No, what I mean is that if you DO NOT replace the diodes and simply RESOLDER the diodes, the set might work for a short time. I have seen peeps do this all the time and think that the TV set is repaired and that the diodes must have had a simple bad connection on them. This is simply not the case. heating upm the diodes sometimes fixes the diodes for some reason. YOU MUST REPLACE THE DIODES. And yes that will involve unsoldering the old diodes, taking  OUT of the circuit board, and replacing them with the NEW diodes.

    I know what you are talking about, when you heat up a diode you can change it's characteristics. That is the key to this repair, Some characteristic of this diode, like the forward bias voltage is very critical for proper operation of this circuit. The diode is technically doing it's job, but not like the circuit wants it to do. When you heat it up, you may temporarily change this behavior, but it wll go back to it's original malfunctioning state. I still have to complain about this circuit, in my opinion it is a totally STUPID circuit. Larry here is another good one for you. I have a sony tv in here right now for another stupid reason. the complaint is that sometimes the picture is distorted. I found the fix for this but get this! - The reason is because the power supply is coming up too fast and it is not allowing enough time for some of the main processes begin before the digital video circuits come up. so i need to add a cap to the 5 volt line supplying the digital video circuits so that it wall have about a 2 millisecond delay to allow the other circuits to come up faster, they also added a coil to slow the time as well.The tube days were so much easier. Who cares how fast a power supply comes up as long as you get power. This kind of sensitivity always aggravates me with sony. 

    tinmandave
    tinmandave's picture
    Larry & zapdbf, Thanks for

    Larry & zapdbf, Thanks for clairifing that deal about the soldering.  I got the new diodes from the partstore.com & I have a friend who can do the soldering work for me. I'll let you guys know how everything works out. Thanks for all the help.  

                                  Dave 

    zapdbf
    zapdbf's picture
    i think i am becomming one of

    i think i am becomming one of those bitter old techs, HELP! Someone save me from myself. Yell

    Larry Dillon
    Larry Dillon's picture
    Hey dude! Once your there it

    Hey dude! Once your there it is TOO late to get any help! Take my word on this one.

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