(Topic ID: 271659)
Quoted from cpr9999:I would not touch it
You think a pro board tech might have a shot?
Quoted from SilverballSleuth:You think a pro board tech might have a shot?
No, I don't think so
How about the other side of the board? I think you would need to desolder and resolder those solder joints.
Minneapolis, MN
Do you have good continuity between pins whose trace goes through there? If so, I wouldn't worry about that damage much. It's not like the condition of the pcb really affects the functioning of the circuit.
I'd be more worried about if the components are good, and what caused the damage
Problem with continuity test is it might be good, but then you “shake” play the machine and you might get a frustrating intermittent connection.
You could use small wire wound wire and solder wire between each connection to guarantee connection.
Way more work than worth it - get a better used version.
Quoted from cpr9999:Not sure if these are shorts OR they were done on purpose?
[quoted image]
If this is the cleaned image, you are seeing paper towels specks. The one at the top is a bent leg.
This part of the board usually (almost always in every board I have seen) has excessive heat exposure. Those 27 Ohm resistors heat up so that they are hot to the touch within one minute of power on.
As long as the board is electrically correct there is no reason it should not work. If you are keen to use this board and want to prevent further heat damage you should apply the "MOSFET modification".
https://www.pinwiki.com/wiki/index.php?title=Data_East/Sega#Using_MOSFETs_in_the_Lamp_Matrix_Circuitry
https://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Using_MOSFETs_in_the_Lamp_Matrix_Circuitry
Williams System 11 CPU boards have the same problem. I don't have a heat camera image of the original TIP42 components. I only have an image with the MOSFET modification. The hot spot is in the lamp rows not the lamp columns.
14_cpu_lamp_rows.jpgQuoted from DumbAss:This part of the board usually (almost always in every board I have seen) has excessive heat exposure. Those 27 Ohm resistors heat up so that they are hot to the touch within one minute of power on.
As long as the board is electrically correct there is no reason it should not work. If you are keen to use this board and want to prevent further heat damage you should apply the "MOSFET modification".
https://www.pinwiki.com/wiki/index.php?title=Data_East/Sega#Using_MOSFETs_in_the_Lamp_Matrix_Circuitry
https://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Using_MOSFETs_in_the_Lamp_Matrix_Circuitry
Williams System 11 CPU boards have the same problem. I don't have a heat camera image of the original TIP42 components. I only have an image with the MOSFET modification. The hot spot is in the lamp rows not the lamp columns.
[quoted image]
Cool image
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