Swords of Fury
Williams, 1988I am having an issue with the second display on a SOF. It is missing the top line on all segments of this display only. I do not see what is responsible for lighting this segment in the schematics. I assume it is on the master display board. Is there a chip or component that would only affect the player 2? This is an alphanumeric panel.
Thanks for any input.
Easy things first.
With power off, reseat both ends of the ribbon that connects the display to the master display board.
Test again.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Agree with @ChrisHibler. Try simple things first before you bust out either the DMM, logic probe or de-soldering tool.
If the simple things don't fix it then take a look below. I assume you are describing the line segment at the top of all 7 alphanumeric of player 2. This is segment "a".
Quoted from DumbAss:Agree with ChrisHibler. Try simple things first before you bust out either the DMM, logic probe or de-soldering tool.
If the simple things don't fix it then take a look below. I assume you are describing the line segment at the top of all 7 alphanumeric of player 2. This is segment "a".
[quoted image]
Another question, that is just a data line you pointed out right? I know there is high voltage on that board so I don't want to fry a probe being careless.
The signals are logic level up to and including the inputs to U12.
From the outputs of U12 in, they are HV. You will need to use a DMM if it gets to that point.
I’ve seen both 4050 and 7180 failures so I can’t give you a specific recommendation.
But certainly start by verifying the 4050.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Quoted from ChrisHibler:The signals are logic level up to and including the inputs to U12.
From the outputs of U12 in, they are HV. You will need to use a DMM if it gets to that point.
I’ve seen both 4050 and 7180 failures so I can’t give you a specific recommendation.
But certainly start by verifying the 4050.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Could one of those cause only player 2 display to have an issue? I'm still a beginner when it comes to schematic but it looks like the same chip controls player 1 and player 2.
Quoted from Tomass:Could one of those cause only player 2 display to have an issue? I'm still a beginner when it comes to schematic but it looks like the same chip controls player 1 and player 2.
Segment "a" is the top line segment for player 1 and player 2 (both alphanumeric). If the player 1 segment a is working but the player 2 segment a is not working AND every other segment is working properly then focus on the traces from the glass (the pin for segment a) back to the common source.
The problem could also be in the glass itself and not the display board logic / drive.
Quoted from DumbAss:Segment "a" is the top line segment for player 1 and player 2 (both alphanumeric). If the player 1 segment a is working but the player 2 segment a is not working AND every other segment is working properly then focus on the traces from the glass (the pin for segment a) back to the common source.
The problem could also be in the glass itself and not the display board logic / drive.
Thanks! That helps. If it is the glass I will end up going with LED displays. I will post what I find.
Quoted from DumbAss:Segment "a" is the top line segment for player 1 and player 2 (both alphanumeric). If the player 1 segment a is working but the player 2 segment a is not working AND every other segment is working properly then focus on the traces from the glass (the pin for segment a) back to the common source.
The problem could also be in the glass itself and not the display board logic / drive.
Thank you for the help. At some point in its life, someone replaced a couple of the displays. The trace leaving the solder point does not connect to the last pin here. I reflowed that connection and dragged some solder to the trace and all is working now!
20221221_190509 (resized).jpgWell done!
That repair may last forever.
If it doesn’t, scrape about 1/2” of the solder mask from the trace. Remove the solder from the disconnected pin. Using a clipped resistor leg, tack solder the leg to the trace and to the pin.
It’s a beefier fix.
Perhaps overkill but it will definitely survive.
Enjoy the game.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Quoted from ChrisHibler:Well done!
That repair may last forever.
If it doesn’t, scrape about 1/2” of the solder mask from the trace. Remove the solder from the disconnected pin. Using a clipped resistor leg, tack solder the leg to the trace and to the pin.
It’s a beefier fix.
Perhaps overkill but it will definitely survive.
Enjoy the game.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Gotcha. It's hard to see the broken trace even when I zoom in on the pic. I would've never caught that without a meter. The previous work looks to be light on the solder too. Thank you both for the help on this!
Quoted from Tomass:It's hard to see the broken trace even when I zoom in on the pic.
Yes it is!
I repaired a WPC PowerDriver board yesterday where visually, the trace ran right into the solder meniscus of a part. Yet it wasn’t “making”. Really weird.
Enjoy the game.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Wanna join the discussion? Please sign in to reply to this topic.
Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
This page was printed from https://pinside.com/pinball/forum/topic/sys-11-display-missing-line and we tried optimising it for printing. Some page elements may have been deliberately hidden.
Scan the QR code on the left to jump to the URL this document was printed from.
Wasilla, AK