Badcaps.net Forum
Go Back   Badcaps Forums > Electronics Theory and Troubleshooting > Troubleshooting Game Consoles & Other Weird Devices
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 01-11-2017, 04:34 PM   #1
R_J
Badcaps Veteran
 
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 1,070
Default Nevco MPCW-6 Scoreboard controler

I'v been trying to identify a diode, The number is SG 68A, it does'nt appear to anything to fancy as a fast recovery seems to work for the 2 that are missing, Unit was dropped a year ago and just brought to me now, and the diodes that are missinng off the board are gone but all the diodes used in this have that number
The highest voltage in this unit is 9Volts
Looks like the logo is from General Semiconductor, now Vishay, I will search their site and see what I can find
Looks like SG is the series and 68a could be a date code?
I think I found them
Attached Images
File Type: jpg DSC00299.JPG (1.96 MB, 7 views)
Attached Files
File Type: pdf s1.pdf (79.8 KB, 0 views)

Last edited by R_J; 01-11-2017 at 05:06 PM..
R_J is offline   Reply With Quote
Old 01-11-2017, 05:35 PM   #2
stj
Great Sage 齊天大聖
 
stj's Avatar
 
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 15,469
Default Re: Nevco MPCW-6 Scoreboard controler

if it's from vishay then my databook says it's probably a TVS diode.
p4sma68a / p6sma68a / 1.5smc68a
you can tell which by the size of the original - each of those is a different package.

alternatlivly it could be a 400v 1 / 1.5a rectifier
stj is online now   Reply With Quote
Old 01-11-2017, 05:53 PM   #3
R_J
Badcaps Veteran
 
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 1,070
Default Re: Nevco MPCW-6 Scoreboard controler

Its not a tvs, its seems to be a s1g 1 amp 400volt but its got a peak one cycle surge of 30amps, Its used with 79m05g ic to boost the current for the display, without the diode the display is weak, with a diode in place the display is bright like it shoud be.
Looks like digikey might have it, the missing diodes are CR17 & 18, plus a torn trace that I fixed
Thanks
Attached Images
File Type: jpg DSC00300.JPG (2.51 MB, 5 views)

Last edited by R_J; 01-11-2017 at 05:56 PM..
R_J is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2017
Powered by vBulletin ®
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 11:25 AM.

Did you find this forum helpful?