Not sure of the resistor value of this

[R_J]

Re: Not sure of the resistor value of this

If the picture is tilted, you would need to rotate the deflection yoke, after all this time and heat it will be stuck to the crt neck, loosen the clamp holding it to the neck and try rotating it, if its not out that much don't wory about it. Don't be too concerned about the yellow marks not being lined up, many times that was just a starting point reference, check the rgb convergence in the center of the screen, if its ok then you don't have to change them, The first two tabs closest to the yoke are for purity adjustment
I dought that c310 is bad.
If you replace the c310 and you see the lines thats because that cap is in parallel with the yoke and changes the impedence of the yoke circuit and slightly increases the deflection, so I would go after the 2 electrolytics in the output circuit.
If the lines are just slightly noticable at the botom, it might just need the vertical height adjusted slightly, there should be about 3/8" of overscan aprox.
If c403 looses value slightly , it can cause the picture to not fill the screen properly. try replaceing it, c304 might also affect the vertical size slightly.

[petehall347]

Re: Not sure of the resistor value of this

i just looked at the pic again and it looks level to me at the lower screen ...upper right looks pulled up so those shift plates might need a nudge like i mentioned earlier ....
the factory marks are not aligned ...
just remember where they are before moving them ..
am thinking its the ones closest to back of tv that will shift the picture .
its been a long time since i messed with one ..
also looks like height might need a tweak as well . probably a pot on main pcb for that .

[R_J]

Re: Not sure of the resistor value of this

moving the convergence tabs won't tilt the picture, they are for r.g.b. convergence at the center of the screen (see manual page 7) to turn the picture you need to turn the yoke. To adjust the height you need to go into the service menu, Page 10 in manual (page 6 of service menu) there are no adjustments on the chassis itself.
There looks like a VCENT (on page 9 of service menu) that could adjust the whole picture down slightly fixing the lines at the bottom an showing more of the top os the screen.

[ducky29]

Re: Not sure of the resistor value of this

How can I do this? When you say "deflection coils block", do you mean the yoke?

I loosen the screw on the clamp and I tried to rotate the yoke but it won't move. Probably because of the white adhesive between the yoke and the black padding on the tube. I'm not sure how to proceed.

No don't realign it.Those things never move unless you change the entire screen.I think it can be fixed through the service menu.

[R_J]

Re: Not sure of the resistor value of this

There is NO tilt adjustment in the service menu, That yoke was most likely crooked from day one, (seen it many times) If its that tight to the neck of the tube you could end up either breaking the yoke coils from the plastic or worse break the crt neck.
Some large crt tv's 32" plus had a tilt adjustment but those tv's had an extra coil seperate but close to the yoke, and a seperate drive circuit. this 14" won't have that
The amount of movement needed to correct this amount of tilt is very little, it won't even break loose of the silicone on the wedges, Try and turn it a bit by grabing it on the plastic near the front of the yoke, but be carefull not to touch the coil.

[korotoyo]

Re: Not sure of the resistor value of this

0.033uF 5% Tolerance, 100V, Polyester film (more likely).
Does it show as bad? Leakage resistance?

What is leakage resistance? How do you check for it? I'm assuming I need a special tool for this like an ESR Meter or something?

What are the tools I need to properly check a bad capacitor?

There is NO tilt adjustment in the service menu, That yoke was most likely crooked from day one, (seen it many times) If its that tight to the neck of the tube you could end up either breaking the yoke coils from the plastic or worse break the crt neck.
Some large crt tv's 32" plus had a tilt adjustment but those tv's had an extra coil seperate but close to the yoke, and a seperate drive circuit. this 14" won't have that
The amount of movement needed to correct this amount of tilt is very little, it won't even break loose of the silicone on the wedges, Try and turn it a bit by grabing it on the plastic near the front of the yoke, but be carefull not to touch the coil.

Yes I tried the service menu mode and couldn't find any tilt settings. I did not notice or mind the tilt issue when I bought it new maybe 3 years ago because it was just for watching local channels but I'm not surprised if it's tilted like this from the start.

I did exactly that way even with a rubberized gloves but it's too stuck on the white rubber-like silicon adhesive. I can move it a bit but since it's too stuck it will just go back to its original position when I let go. Can I do it while the TV is on?

[korotoyo]

Re: Not sure of the resistor value of this

i just looked at the pic again and it looks level to me at the lower screen ...upper right looks pulled up so those shift plates might need a nudge like i mentioned earlier ....
the factory marks are not aligned ...
just remember where they are before moving them ..
am thinking its the ones closest to back of tv that will shift the picture .
its been a long time since i messed with one ..
also looks like height might need a tweak as well . probably a pot on main pcb for that .

No, the whole picture is tilted. Maybe because of the angle I took the picture. Top and bottom right corners are pulled up while the top & bottom left corners are pulled down.

[korotoyo]

Re: Not sure of the resistor value of this

Under service menu mode I can adjust settings like vertical height, horizontal pos, vertical pos, etc..but I'd like a picture guide for it. Is a 640x480 test image pattern be fine?

[R_J]

Re: Not sure of the resistor value of this

That silicone should come loose quite easily, just make sure the clamp on the neck is loose, and yes you can adjust it when its on just be careful of the bare connections on the yoke, they will bite Like I said it should not have to rotate the yoke very far to make the picture straight, maybe 1/2 a degree. a 640x480 pattern should work, give it a try and see what it looks like

[keeney123]

Re: Not sure of the resistor value of this

When working on this type of TV the fly-back transformer should be grounded at all times. This can be done from chassis ground. A jumper with a alligator clip to ground and a wire clipped on the other end of the jumper onto the blade of a insulated handled screwdriver . The screwdriver blade should be a flat tip very small in diameter. The blade is inserted under the rubber circular flap while holding the insulated handle of the screw driver until one hear a snap. Then the wire clip is removed from the blade of the screw driver. This wire clip is then attached under the rubber flap to the metal wire and left there all the time one works on the TV. When you get ready to test the TV you will first remove the jumper. If you are going to work on the TV again you would follow the above procedure.

[petehall347]

Re: Not sure of the resistor value of this

No, the whole picture is tilted. Maybe because of the angle I took the picture. Top and bottom right corners are pulled up while the top & bottom left corners are pulled down.

did you try degaussing it ?
also did you try rotating the tv ?

[korotoyo]

Re: Not sure of the resistor value of this

That silicone should come loose quite easily, just make sure the clamp on the neck is loose, and yes you can adjust it when its on just be careful of the bare connections on the yoke, they will bite Like I said it should not have to rotate the yoke very far to make the picture straight, maybe 1/2 a degree. a 640x480 pattern should work, give it a try and see what it looks like

I did it!

My screen looks better now.

The only thing I did wrong is that I accidentally set the "INITIAL" service mode setting but all good now. One setting I cannot bring back is when the tv is manually switched on I can just plug in the power cord and it will be on. Now when I plug in the power cord I would need to use the remote control to turn it on. Anyone knows what the service setting code for it?

Thank you all guys! Next move is to replace the caps. But I hope someone can suggest a tool or something for testing or detecting bad capacitors.

[R_J]

Re: Not sure of the resistor value of this

If the set is on and you unplug it, and plug it back in does it come on then ? I don't see a setting for that in the service menu
So you say you changed the value on page 17 "initial" from 00 to something else?
You might try changing Page 15 "HOTEL" from 00 to 01 and see if that does it
Also check in the regular tv menu and see if there is a setting

[korotoyo]

Re: Not sure of the resistor value of this

If the set is on and you unplug it, and plug it back in does it come on then ? I don't see a setting for that in the service menu
So you say you changed the value on page 17 "initial" from 00 to something else?
You might try changing Page 15 "HOTEL" from 00 to 01 and see if that does it
Also check in the regular tv menu and see if there is a setting

Yes it does turn on automatically before. And yes I changed the "INITIAL" value maybe to 00 which caused the screen to reset.

Changed the "HOTEL" to 01 but it's the same. No setting on regular menu.

[R_J]

Re: Not sure of the resistor value of this

What about the settings (page 15) for Mode0 & Mode1 are they the same as in the manual?

This is what a different model has, in op4 (1) is where you would set that option.

[korotoyo]

Re: Not sure of the resistor value of this

What about the settings (page 15) for Mode0 & Mode1 are they the same as in the manual?

This is what a different model has, in op4 (1) is where you would set that option.

I tried some values for the Mode0 & Mode1 but nothing works.

I've gone over all the service menu pages but couldn't find anything related to op4.

[R_J]

Re: Not sure of the resistor value of this

Ah the old, should have writen down the original values, or took screen pictures. I guess you could always shoot off an email to Changhong, other than that I don't know.
One page 1 there is a opt Optional Setting but I have no idea what it does either

[korotoyo]

Re: Not sure of the resistor value of this

Ah the old, should have writen down the original values, or took screen pictures. I guess you could always shoot off an email to Changhong, other than that I don't know.

Yeah I know. I only took pictures of page 6 & page 7, the ones I changed values from.

Thank you all guys for the help!