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Need help with my G-LOC Motor Driver Boards

Démarré par perjmolsen, Mercredi 05 Décembre 2018, 09:27:25 AM

perjmolsen

Hi

I hope that some one is able to help me.

My issue is that i have three defective G-LOC Motor Driver Boards / cages.
I have one fully working cage but I need two.

I have managed to get all the correct voltages present, but when I test them in my Sega g-loc deluxe there is no movement.
(only movement if i mount the one powersupply that there is working)

The last year i have tried to find out why but i have not been able to solve the issue, so therefor I reach out to you again in my last hope that some one can help me.



I am willing to ship the cages and all my components for repair and also some money to that person who might be able to help me.  ^-^

I have followed the super guide written by GC339 here https://www.gamoover.net/Forums/index.php?topic=28660.0


Kind regards
Per

perjmolsen

I have tried to follow GC339 (answer 10) here -> https://www.gamoover.net/Forums/index.php?topic=28406.msg453283#msg453283

The above board I have changed the PC8 because it had a burned spot.


I have also changed all the zener diodes ZD03->ZD11 (because when for two years ago when i successful repaired a driver cage the reason for the missing movement where some bad Zener diodes)

but still no movement.....
Kind regards
Per

perjmolsen

#2
An update more - I have uploaded an Excel file to dropbox and marked all the components green that i have changed.
Components marked brown i have tested in circuit, and yellow the components i think is related to the logic movement part.

See the tab "Repair log module 3" for all the parts that i have changed/tested on this board.

Hopefully someone can guide me in the right direction in what i need to test/change in order to get the final movement part working

https://www.dropbox.com/s/cajy4szrq1bybzj/Nomenclature.ods?dl=0

Kind regards
Per

perjmolsen

Kind regards
Per

perjmolsen

#4
Hi

YES YES YES - Finnaly!! (again) I now have movement!!   :-)= :-)= :-)=

ITS ALIVE !!!  :-)=
https://www.youtube.com/watch?v=LLg24sFB-rw


I have read CG339's guide over and over -> https://www.gamoover.net/Forums/index.php?topic=28406.msg453283#msg453283.. and finnaly i managed to put two and two together :)
in this tread where he shows a diagram of the control logic, he mentions PC7,PC8,PC9 and PC10 as components who isolates the high voltage and low voltage...

So i where thinking  ;).. maybe they are dead, and i did not know how to test them so i swaped them with some new




So if you have all the correct volts, checked for burned traces.. but no movement then change
PC7,PC8,PC9,PC10 then you have movement.

I have updated my repair log on module 3 -> https://www.dropbox.com/s/cajy4szrq1bybzj/Nomenclature.ods?dl=0





Kind regards
Per

Manu2


perjmolsen

If someone needs the service manual for adjusting the pontometers or greasing, then you can get a copy of my manual here:

https://www.dropbox.com/s/h9qqlehvooe2qqa/Sega%20g-loc%20service%20manual.zip?dl=0
Kind regards
Per


perjmolsen

Citation de: Vieille_Loutre le Jeudi 13 Décembre 2018, 19:01:26 PM
Nice job!  ^-

Thanks -  ^-
Is your Rad mobile still working after you did the second repair to your power supply?
This time i have mounted som cooling fins on Q20 and Q22 (K1250)
On my there where none, I am thinking as it where the K1250 who where dead, it might be caused by heat.

So this time i really really hope that my repair holds up for many years.

Kind regards
Per