Need Help for my new arrival BVM-D20F1J singal problem

[snoopyj]

Hi Guys,

I am very luck to get an old BVM-D20F1J monitor with almost 80000 working hours from Japan. But after the long distance shipment, the monitor is in very bad condition

There is electronic interference full of screen with yellow masks when it connected to any component signal or RGB signal.

While I try to switch the internal Color Bar signal from the Preset Auto Menu, there is NO STABLE SIGNAL on the screen.

Could someone please to tell where is problem and give some suggestions for fixing.

Many Thanks

http://image16-c.poco.cn/mypoco/myphoto ... 713044.jpg

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http://image16-c.poco.cn/mypoco/myphoto ... 180702.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 814057.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 821070.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 826093.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 832022.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 839082.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 845087.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 819017.jpg

http://image16-c.poco.cn/mypoco/myphoto ... 826066.jpg

[Fudoh]

pictures don't work for me. Maybe use a more commong picture hoster like imgur ?

[Pasky]

pictures don't work for me. Maybe use a more commong picture hoster like imgur ?

The pictures work if you truncate the '1024x768_120 '

i.e.

http://image16-c.poco.cn/mypoco/myphoto ... 826066.jpg

[snoopyj]

I re-edit the post. Does that work now?

[Xan]

No, it doesn't.

[Ed Oscuro]

I manually copied and pasted the links to make them work.

You should describe more fully the problem. What are observed damages to the set? What is the quality of the problem in each instance? For example, the fourth picture showing Alucard is hard to understand.

That said, I think the big "wave" across the screen in the third picture is probably a good clue. I haven't seen exactly that before. Hopefully it is fixable. But it's quite different from the apparent diagonal waves (I don't think it's retrace lines; it looks like some kind of interference) in the first picture.

Picture by picture:
1.) Slightly diagonal pattern, wide bands of varying brightness, not sharp lines, over the entire image. Doesn't look like retrace lines to me, but the interference lines start lower on the left.
2.) Suggests something bad but a video would probably be more help. Can't understand it.
3.) I almost forgot that the PSP has that wave in the center. Otherwise, same behavior as the first image.
4.) Dracula X, might very faintly show the previous wave pattern, but hard to tell.
5.) Diagonal pattern very visible here.
6.) On the plus side, the basic colors and geometry look fine.
7.) Interference pattern again, but hard to understand.
8.) Ditto.
9.) Ditto.
10.) Here there appear to be retrace-like lines running diagonally the other way! Strange! Bright and somewhat thin lines on the dark background of the BVM's OSD with no input.
11.) "Signal unstable" might be the clue.

So, maybe an input board problem? Who knows? I think that the set itself might be in good shape. You mentioned damage from shipping, but as far as I could see, the cabinet doesn't look too damaged. I'm not sure if that curve in the first picture is normal, but that's certainly not a functional issue. CRT seems to be aligned straight in the chassis.

[snoopyj]

I manually copied and pasted the links to make them work.

You should describe more fully the problem. What are observed damages to the set? What is the quality of the problem in each instance? For example, the fourth picture showing Alucard is hard to understand.

That said, I think the big "wave" across the screen in the third picture is probably a good clue. I haven't seen exactly that before. Hopefully it is fixable. But it's quite different from the apparent diagonal waves (I don't think it's retrace lines; it looks like some kind of interference) in the first picture.

Picture by picture:
1.) Slightly diagonal pattern, wide bands of varying brightness, not sharp lines, over the entire image. Doesn't look like retrace lines to me, but the interference lines start lower on the left.
2.) Suggests something bad but a video would probably be more help. Can't understand it.
3.) I almost forgot that the PSP has that wave in the center. Otherwise, same behavior as the first image.
4.) Dracula X, might very faintly show the previous wave pattern, but hard to tell.
5.) Diagonal pattern very visible here.
6.) On the plus side, the basic colors and geometry look fine.
7.) Interference pattern again, but hard to understand.
8.) Ditto.
9.) Ditto.
10.) Here there appear to be retrace-like lines running diagonally the other way! Strange! Bright and somewhat thin lines on the dark background of the BVM's OSD with no input.
11.) "Signal unstable" might be the clue.

So, maybe an input board problem? Who knows? I think that the set itself might be in good shape. You mentioned damage from shipping, but as far as I could see, the cabinet doesn't look too damaged. I'm not sure if that curve in the first picture is normal, but that's certainly not a functional issue. CRT seems to be aligned straight in the chassis.

Thanks for your reply Ed Oscuro. I am gonna update more screenshots again for searching more clues and discuss with all mates here. I'd very appreciated anyone who can give me reply and share any thoughts from you.

Today I try to dial SONY Hot Line for maintenance in Shanghai and they put me to an technician.

I upload my images to that guy,according to his judge, there might be something wrong in Monitor's scan circuit, or perhaps capacitors. I am gonna transport my stuff to the SONY factory on next week... BUT whether it would be fixed or not ? Hopefully....

[snoopyj]

One more thing, the rear side of its cabinet is loosen, it looks some screws dropped off and missing...

[snoopyj]

Hi guys,

I am trying to re-edit the post for the missing-linked images and with my own comments. Thanks for your lasting patience everyone. Hope someone can share some of their opinions with me...

Thanks...


The Monitor is in standby mode with NO Signal Input, some buzzing interference on the screen.


When it connected to the PS3 with (Component 480P signal) the picture shows no big problems


About 5-10 mins later, there will be some Waves on the screen ( Seiya)



About 15-20 mins later, the waves becomes full of screen with yellow masks (Shun)



When I quit to the XMB, the screen is full of interference lines with yellow masks (XMB)


Then I turn my ps3 off, When the Input Signal terminated, there will be still some interference lines on the screen.

Then I turn off the monitor and restart it, it will go back to the first picture shows.
--------------------------------------------------------------------------------------------------------------



Today I try to test some cartoons through component (480i)
After 15 to 20 Mins, the pictures looks like the ablove


Then I turn my player off, When the Input Signal terminated, the sreen goes like that.

And there is one interesting phenomena according to my observation, that is : the discolored interference will be appear after the monitor running about 15 to 20 mins, when I restart the monitor, the discolored interference can be removed, BUT it still goes back after 15 to 20 Mins....

What's wrong with my monitor ?!

[Fudoh]

really hard to tell, but the only (cheap) thing you can try easily is to terminate the outputs properly. If they are not terminated, this can cause all kinds of weirds problems. You need 75 ohm BNC termination plugs. One for each loop out next to the inputs you're using. They're usually around $1-2 per piece.

[snoopyj]

really hard to tell, but the only (cheap) thing you can try easily is to terminate the outputs properly. If they are not terminated, this can cause all kinds of weirds problems. You need 75 ohm BNC termination plugs. One for each loop out next to the inputs you're using. They're usually around $1-2 per piece.

Thanks Fudoh,

I have ordered the termination plugs. They are on the way. And I will try to block the blank outputs.

PS: I am wondering why? The BKM X48 Board doesn't have automatic termination function within BVM-Sereies Monitor?

I used to have PVM-14L5, it seems no need to add more termination plugs to its blank outputs... The picture still looks awesome...

[Xan]

PVMs self terminate, which you can also see by the symbol next to the outputs.

[snoopyj]

Get some ideas from a Chinese BBS, might be something wrong in Retrace Lines or Blanking Circuit

[Ed Oscuro]

Sounds good, you might have a chance to fix it. Check out the capacitors first, if you have to do this yourself. Best of luck and don't get shocked

[snoopyj]

really hard to tell, but the only (cheap) thing you can try easily is to terminate the outputs properly. If they are not terminated, this can cause all kinds of weirds problems. You need 75 ohm BNC termination plugs. One for each loop out next to the inputs you're using. They're usually around $1-2 per piece.

Thanks Fudoh,

I have ordered the termination plugs. They are on the way. And I will try to block the blank outputs.

PS: I am wondering why? The BKM X48 Board doesn't have automatic termination function within BVM-Sereies Monitor?

I used to have PVM-14L5, it seems no need to add more termination plugs to its blank outputs... The picture still looks awesome...

Hi, Fudoh,

I tried termination plugs. Still No Use. the picture looks the same worse. But thank you for your advice.

[snoopyj]

Sounds good, you might have a chance to fix it. Check out the capacitors first, if you have to do this yourself. Best of luck and don't get shocked

The SONY's Circuit Board is too complicated for me, I think , I am gonna ask the technician for help on next week.

Hopefully it can be fixed, Just replace some capacitors on the circuit broad.

[snoopyj]

[snoopyj]

RGB signal Test 480i & 480P

Better than last shot , Still need be fixed and adjuested

[snoopyj]

Get back from the Sony Maintenance Side. Bad News Still cannot be fixed..... Something Wrong within the circuit board.... And cannot judge in which board. because of shot of spare parts.... cannot make comparison.

What should I do now....? How can I repair by myself ?!

[snoopyj]

6 Monthes has been passped, but I still want to fix the problems, Recently I pruchased another BVM-D20F1J, which has 19205 Operation Hours, better than last one, but it has colour distortion on the right bottom of the screen. how could I fix the problem, some one in china told me it was deflection circuit problems.

Now I have two same monitors with probelms, how can I make them into one "better" monitor

Do need your help guys....

[Xan]

Did you replace the caps yet?

[andy251203]

Color distortion in a corner can indicate problems with yoke calibration. Try manually degaussing the monitor first with a degauss coil. If that does not work, try adjusting the "landing" adjustment in the menu.

If it was dropped in shipping, the aperture grill might have been damaged, causing the distortion.

[snoopyj]

Did you replace the caps yet?

No, I bought the same one which has some colour problems, but I still want to combine two "BVM 20F1J" into good one.

[snoopyj]

Color distortion in a corner can indicate problems with yoke calibration. Try manually degaussing the monitor first with a degauss coil. If that does not work, try adjusting the "landing" adjustment in the menu.

If it was dropped in shipping, the aperture grill might have been damaged, causing the distortion.

Thanks for your reply

Where can I buy the degauss coil ? and what about its size? sepcificiation ?

[snoopyj]

6 Monthes has been passped, but I still want to fix the problems, Recently I pruchased another BVM-D20F1J, which has 19205 Operation Hours, better than last one, but it has colour distortion on the right bottom of the screen. how could I fix the problem, some one in china told me it was deflection circuit problems.

Now I have two same monitors with probelms, how can I make them into one "better" monitor

Do need your help guys....

I mean how to change the deguss coil, where is the staf within the monitor ?

[snoopyj]

6 Monthes has been passped, but I still want to fix the problems in my last BVM-D20F1J, Recently I purchased another BVM-D20F1J, which has 19205 Operation Hours, better than last one, but it has colour distortion on the right bottom of the screen...

In a word, I want to combine "problemetic" 2 monitors into 1 "perfect" monitor...

Finally, I've found the problem in my last 80000 hours monitor, it was the BK borad. I pulg out its BK board and insert into my new purchased 19205 hours monitor, the screen gones wave-interferenecd, same with my last shot.

BUT I have new problems, the 80000 hours monitor is get damp when it is exposed to the outdoors in a heavy rain and it cannot be turn on.

Now I have 2 options to combine the 2 monitors into 1

1. Change the BK board in my damped 80000 hours monitor. (I need know how to make damped CRT monitor live again ?)

2. Change the deguss coil in my new purchased 19205 hours monitor ( big project, I have to disassemble the complicated structred BVM moitors, maybe i can't put all parts together back ).

Which one can I choose ? some one can give me some advice ?

[snoopyj]

After using external degauss tools. Finally fixed the probelm....

[snoopyj]

Thanks for all of your guys who offers help and advice.