Wells Gardner d2900 pulsing screen .. caps ?

[Retroman839]

does you flyback have the wire winding around around the ferrite core?

Will take a look

 

[Retroman839]

Don't think i've ever seen an LG Philips crt on a WG D9200/D9400 monitor before but it's the correct crt as Grant says, and you can see the original WG sticker with serial number on it. Pretty sure every one i've ever come across have used RCA or Thomson crts whether it's semi-flat/curved or flat.

On arcade projects
The collective on yoke readings have this monitor listed with d9400

 

[Retroman839]

does you flyback have the wire winding around around the ferrite core?

Yes they have it

C314 are all 25v 2200 uf
As manual says ..
I just couldn’t see values as they are around Back of cap

 

[Retroman839]

Also got this going on on the right

 

[Retroman839]

Same type of chassis now but a diffrent chassis


So maybe my yoke has moved ?

 

[gunblade]

bad game board to use as they have an odd thing going on with the sync

 

[Retroman839]

bad game board to use as they have an odd thing going on with the sync

I think your spot on ..
I was going to ask others that have this type of board if they can report this screwy sync


So I must have a partial vertical collaps on one of the chasiss
So will check / swap some caps in the vertical ic circuit to start with

 

[Retroman839]

Repaired 2’of these chasiss
Last week obvious issues
They had been chucked about and the large heat sinks on the kneck pcb and ones on the vertical ic also hanging off the pcb..

Plugged them up and seem to be ok 😊👍

 

[Retroman839]

The chassis with vertical issue
Screen seems to be curling back on its self .. ( fold over but more of a curving round on its self.

Found an old thread same issue

It was C312 Reading 200 ohms in circuit should be 1.7k ohms.

New cap at C312 fixed issue so will try that cap