Neotec 2701 adjustment question

C65Mustang

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I have a fixed 2701 but cannot get the width down enough. The remote board has the width turned to the smallest it will go. I was told to adjust the width pot on the chassis but I cannot find it. How do I adjust this pot and where is it? Pictures coming in 2 posts
 

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more pictures

here are a couple more of the chassis installed
 

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Still trying to figure out how to make the screen not so wide other than the adjustment on the remote board. Any help would be great I'm almost done with this friends monitor
 
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2420b5f8aff12f196bcebd29ab827d22.jpg


This is currently how the screen looks. Sorry for the reflection, but you can see that the left side is way off the screen. The remote boards adjustments have it as far in as I can.
 
Still trying to figure out how to make the screen not so wide other than the adjustment on the remote board. Any help would be great I'm almost done with this friends monitor

One or more of the Safety caps are the wrong value

seen next the flyback next to the big diode all are polyester HV caps.

looks like they have been replaced with the wrong value.

You record the location and take the cap out and see what the value is

not every chassis has the same location but if you can see a polyester cap

then that's the caps im talking about.

Most are like c423 c421 etc.
 
One or more of the Safety caps are the wrong value

seen next the flyback next to the big diode all are polyester HV caps.

looks like they have been replaced with the wrong value.

You record the location and take the cap out and see what the value is

not every chassis has the same location but if you can see a polyester cap

then that's the caps im talking about.

Most are like c423 c421 etc.
Yes this is correct. Your width circuit poly caps are incorrect. Same thing happens in Sanwa monitors all the time.
 
Yes this is correct. Your width circuit poly caps are incorrect. Same thing happens in Sanwa monitors all the time.



OK, I am getting confused a little and want to clear the confusion in my mind a little


When you say Poly caps are you all talking about normal Electrolytic capacitors?

Just wanting to double check things and make sure I am not thinking of the other porcelain capacitors that are a bit more uncommon in the chassis repair area.
 
OK, I am getting confused a little and want to clear the confusion in my mind a little


When you say Poly caps are you all talking about normal Electrolytic capacitors?

Just wanting to double check things and make sure I am not thinking of the other porcelain capacitors that are a bit more uncommon in the chassis repair area.



Most common are these two.

C419
C421
......
C423
C424
these can but not an issue unless they are real dark and split body.


You have the chassis compare your model to the parts list.

copy down what you pullout the number on the part.

Most common to me is C421 c419

http://www.arcade-museum.com/manuals-monitors/Neotec 2700 Full Family version.pdf

These manual is for three models and some changes may not be noted

for each version.

But if you would just say whats in each location?
starting with C419, c421 directly related to the symptom.



Once you post the value you see on the part and match location and part

Number with manual it will make a better understanding what has changed

If the tube and yoke are original then I would stick with the values in the circuit.


and no polys should be on the bottom of the chassis that is parallel a poly.

as for the power supply you need around 100vs dc

so the band side of d106??

or at the back of chassis at r120 a easy test point to get to.

always using the H.O.T heatsink as a good cold ground.

to much dc from the PS will change the geometry/size to much so confirm

its not to high also.
 
I completed a cap kit from Bob on this chassis. If one of the caps I got in his kit was the wrong value could it do this stretched screen issue also? I will check the C419 and C421 as soon as I get a chance to pull them
 
I completed a cap kit from Bob on this chassis. If one of the caps I got in his kit was the wrong value could it do this stretched screen issue also? I will check the C419 and C421 as soon as I get a chance to pull them

Polarized E-caps won't cause this issue.

This should be one of the 4 as a example.

The correct uf and dc voltages.


http://www.mouser.com/ProductDetail...GAEpiMZZMsh%2b1woXyUXj97jN2gZ/jj1FcCQVdMm/Us=

these are what was being used.

As for a cap kit they are often for a series of chassis and should not

be assumed that they are some kind of upgrade for the replacement

it may be noted in the instruction with it.

so when you changed a e-cap from a chassis just re-install what was there

or ask someone, if the replacement part is compatible to the original part

Be sure to mention with this happens, and we can fix it right then..
 
Polarized E-caps won't cause this issue.

This should be one of the 4 as a example.

The correct uf and dc voltages.


http://www.mouser.com/ProductDetail...GAEpiMZZMsh%2b1woXyUXj97jN2gZ/jj1FcCQVdMm/Us=

these are what was being used.

As for a cap kit they are often for a series of chassis and should not

be assumed that they are some kind of upgrade for the replacement

it may be noted in the instruction with it.

so when you changed a e-cap from a chassis just re-install what was there

or ask someone, if the replacement part is compatible to the original part

Be sure to mention with this happens, and we can fix it right then..

those are what's in my monitor width cap kit.
https://www.arcadepartsandrepair.com/store/monitors/monitor-cap-kits/monitor-width-cap-kit/
 
I don't read on your site that this kit is for an certain chassis or series thus of. Is this basically a kit of all different kinds of poly caps used in width circuits? I ten just adjust if a certain value doesn't seem to work?

yes its a kit of metalized poly caps that are used in width circuits for many monitors and there is many values and voltages to cover alot of various monitors. the description on my site has all the values listed and they are all 250v or 630v caps nothing lower. let me know if you have any other questions.
 
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