Wells Gardner expert

[Purity]

I was wondering if a WG monitor expert would assist me in understanding something I noticed on a monitor I'm recapping?

The monitor chassis model is 2061433-040 so I referred to the manual "K4900 (Med Res) - 19K4915" on MikesArcade.com:

http://www.mikesarcade.com/arcade/monitors.html

What I've noticed is that on the solder side of the board there is a 1uf 63v capacitor solder to points D306. If I look at the parts side of the board the diode at D306 looks to be correct.

Does anyone have any idea why this capacitor is here? I don't seem to see any reference to it in the manual

Also the capacitors I have replaced are different to what is says in the manual - clearly the board has been worked on before.

For example:

On the chassis was: Manual/I installed:

(C301) 330uf 35v 330uf 50v
(C308) 3.3uf 50v 2.2uf 50v

EDIT: I now realise that this chassis is actually a K4800 which is the 13" version of the K4915, so there are some slight differences with caps etc
Purity2013-06-17 18:23:37

 

[Alpha1]

Email John Pruski, he has answered my queries before!

http://www.wellsgardner.com/contact/#6

 

[Purity]

Thanks dude, I will bear that address in mind.

However I think this has been done by a previous owner. I just don't understand why, so I don't know how much WG could assist?

It looks like someones handy work, as they have used axial capacitors instead of radial capacitors with heat shrink on, and this looks similar
Purity2013-06-16 18:24:24

 

[Guests]

Email John Pruski, he has answered my queries before!

http://www.wellsgardner.com/contact/#6

Yeah he's a really cool guy, he's helped me out a couple of times also.

 

[Purity]

It's ok, I've discovered that it is meant to be there

The schemes indicate C373 (a 1uf 50v cap) at the D306 points