Arcade Collecting > Restorations & repair
GORF!!!!
dmel75:
I spent some time cleaning the PCB/Cage last night, after checking voltages and finding them to be ok I though it was time to do a little cleaning. I used the sink and the sprayer attachment and just sprayed the PCB cage down and then wiped down all the PCB's. I set those aside to dry and I went back to try and find out more information on the monitor in this cabinet. From what I can gather it's a Wells Gardner K4605/6-5804. Since I'm only getting a solid red screen I thought I should inspect it to see if I could find anything wrong. I did find one thing that looked a bit alarming. In the picture below you can see a long, tan colored 'thingy' and nearby it on the top side of the board there is a bit of white discoloration across the PCB, almost as if it got fried sometime in the past. This 'thingy' is only connected to the PCB on one side, it's connected to the board on the bottom but the top of it is free and it can be moved slightly, but without removing the monitor I cannot see if that is intentional or if it's a break. Thoughts?
The first two pics are of the monitor item in question, the bottom pictures are the PCB cage after cleaning, what a difference!
SirPeale:
That's a resistor. A big one. I don't think anything burned, it just looks like heat over the course of 20 something years discoloured the PCB.
Original caps, monitor could use capping.
Let's see a picture of the red screen. I bet it's a gameboard issue.
After you washed those boards, did you do anything special besides hand towel them off?
I like to put them in an oven preheated @ the lowest possible setting, then turn the oven off and let it sit in there. Any residual water will evaporate.
dmel75:
--- Quote from: SirPeale on June 10, 2009, 11:30:46 am ---That's a resistor. A big one. I don't think anything burned, it just looks like heat over the course of 20 something years discoloured the PCB.
Original caps, monitor could use capping.
Let's see a picture of the red screen. I bet it's a gameboard issue.
After you washed those boards, did you do anything special besides hand towel them off?
I like to put them in an oven preheated @ the lowest possible setting, then turn the oven off and let it sit in there. Any residual water will evaporate.
--- End quote ---
Nope, I didn't really 'wash' the boards, I washed the PCB chassis with a lot of water, it came out really clean. The PCB's themselves didn't need much more than a brushing off so I used an old soft paint brush and went over them real well and then had a 'very' lightly damp soft towel and just dabbed at them a bit. They look clean as a whistle. (see pic below) I also took a pencil eraser to all the gold contacts on the bottom and cleaned those up. I used a hairdryer to thoroughly dry out the PCB chassis (lots of water came out) and then made sure to leave everything out overnight. This morning I checked for water and then plugged the PCB's into the chassis but I have not connected it to the machine again yet. I put the whole assembly back out in my shop for the day. It's pretty hot in Jackson, MS today so I figure any residual water will be gone by this evening when I plan to plug it up and try again. Is it normal for a resistor like that to only be connected on one side?
Mauzy:
--- Quote from: dmel75 on June 10, 2009, 11:53:04 am ---Is it normal for a resistor like that to only be connected on one side?
--- End quote ---
You mean one of the two legs is just hanging, disconnected? To that, I would have to say no, that isn't normal.
SirPeale:
--- Quote from: Mauzy on June 10, 2009, 12:48:07 pm ---
--- Quote from: dmel75 on June 10, 2009, 11:53:04 am ---Is it normal for a resistor like that to only be connected on one side?
--- End quote ---
You mean one of the two legs is just hanging, disconnected? To that, I would have to say no, that isn't normal.
--- End quote ---
DEFINITELY not normal. Resistors have two legs. Maybe it did burn up a bit!
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