Dragon's Lair Fans - Arcade Lifestyle

General Chat => Technical Area => Topic started by: hatster on October 12, 2011, 01:29:07 PM

Title: Powerdrift monitor ! - Sanwa 26"
Post by: hatster on October 12, 2011, 01:29:07 PM

Hey,

still trying to track down the elusive manual, but had a quick look today, lots of burnt places underneath and previous repairs, but......
so i look for the obvious.  AC in = 110v, checking the DC output of the bridge rectifier i get 65vdc, this doesnt look right to me ?


i dont really know a great deal about monitors, so excuse the silly questions, and of course i dont have a schematic which dont help !

thanks,

Title: Re: Powerdrift monitor ! - Sanwa 26"
Post by: level42 on October 12, 2011, 02:26:39 PM

110V is on the high side. Check if it's set up for 220 or 240VAC. If it's set to 220, change it to 240VAC.
Depend on machine how to set this.

But, getting 65VDC out of the diode bridge is way too low, should be something like 150 I suppose. It's always more in DC then what goes in AC. Could be defective bridge but the DC can also be drawn low by shorts are failing components further in the circuit.

Title: Re: Powerdrift monitor ! - Sanwa 26"
Post by: hatster on October 12, 2011, 03:57:59 PM

ok, a diode that had been moved to the underside of the pcb as there was a hole burnt was not attached properly.  I have scraped some track, and resoldered.  hoooray the monitor now works, but unfortunately the game dont :(
it doesnt coin / play / display anything......  next job .

Title: Re: Powerdrift monitor ! - Sanwa 26"
Post by: level42 on October 12, 2011, 05:42:04 PM

Quote from: hatster on October 12, 2011, 03:57:59 PM

ok, a diode that had been moved to the underside of the pcb as there was a hole burnt was not attached properly.  I have scraped some track, and resoldered.  hoooray the monitor now works, but unfortunately the game dont :(
it doesnt coin / play / display anything......  next job .

NICEEE !!!!

Hope the PCB problem will be about as easy :)