Welcome, Guest. Please login or register.
September 28, 2024, 08:19:24 PM

Login with username, password and session length
* Home Help Arcade Login Register
.
+  Forum
|-+  **Reel Slots** Gaming Machines
| |-+  IGT S and S-plus Reel Games. (Moderator: knagl)
| | |-+  S+ cpu - Q22? 		0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: S+ cpu - Q22?  (Read 2369 times)
FOXSSLOTS1
Resigned NLG Member
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 323
Offline Offline

Gender: Male
Posts: 1239


Me at work
« on: February 05, 2012, 03:11:39 PM »
I have way to much time on my hands so I decided to look at some cpu boards - I have an early (may 30 1997 tag) on a 7550570 board - (75505704 rev a tag) - was missing the Q22 and has a jumper for R61 -  all my other boards all  have the Q22 and R61 - my schematic/parts list does not list the R61.  The schmatic shows R61 to U29 as 1K res.  What would this jumper do? 
Logged
CommTech
Contributing Gold NLG Member
Sr.NLG Member 501 to 1000 Post
*

Total Karma Storms: 251
Offline Offline

Gender: Male
Posts: 503


Joe
« Reply #1 on: February 05, 2012, 03:41:34 PM »
Without Q22, R61 is not needed.  R61 would be a bias resistor for Q22.  The jumper would simply complete the "GND PRINT" circuit to pin 8 of the opto-isolator U29.
Logged
FOXSSLOTS1
Resigned NLG Member
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 323
Offline Offline

Gender: Male
Posts: 1239


Me at work
« Reply #2 on: February 05, 2012, 04:08:18 PM »
okay - so that circuit is not needed?   q22/r61 have no purpose?   if I add them both ?
Logged
CommTech
Contributing Gold NLG Member
Sr.NLG Member 501 to 1000 Post
*

Total Karma Storms: 251
Offline Offline

Gender: Male
Posts: 503


Joe
« Reply #3 on: February 05, 2012, 04:21:33 PM »
I am not sure what the purpose of that entire "PRINT" circuit is for to begin with.  I know there is no Printer in the S+.   Scratch Head

Perhaps Q22 is some kind of a De-bounce circuit?

If there is no "PRINT" device, then this circuit is useless anyway.

« Last Edit: February 05, 2012, 04:56:04 PM by CommTech » Logged
FOXSSLOTS1
Resigned NLG Member
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 323
Offline Offline

Gender: Male
Posts: 1239


Me at work
« Reply #4 on: February 06, 2012, 10:47:45 AM »
thank you for the info - I like to look at boards and fix the obvious - since the board in ? was missing the Q22 seemed like an obvious fix?   will add the circuit and watch for smoke or a printout!!! 
Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  

SimplePortal Classic 2.0.5

If you find this site helpful, Please Consider Making a small donation to help defray the cost of hosting and bandwidth.



Newlifegames.com ™    Newlifegames.net ™    Newlifegames.org ™
   New Life Games ™    NewLifeGames ™  NLG ™ We Bring new Life to old Games ™    1-888-NLG-SLOTS ™
Are all Copyright and Trademarks of New Life Games LLC 1992 - 2021


FAIR USE NOTICE:

This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner.
We make such material available in an effort to advance awareness and understanding of the issues involved.
We believe this constitutes a fair use of any such copyrighted material as provided for in section 107 of the US Copyright Law.
In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those
who have expressed a prior interest in receiving the included information for research and educational purposes.

For more information please visit: http://www.law.cornell.edu/uscode/17/107.shtml.

If you wish to use copyrighted material from this site for purposes of your own that go beyond fair use,
you must obtain permission directly from the copyright owner.

NewLifeGames.net Web-Site is optimized for use with Fire-Fox and a minimum screen resolution of 1280x768 pixels.


Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
Loon Designed by Mystica
Updated by Runic Warrior
Page created in 0.084 seconds with 19 queries.