Welcome, Guest. Please login or register.
April 30, 2024, 05:58:16 AM

Login with username, password and session length
* Home Help Arcade Login Register
.
+  Forum
|-+  Monitor Repair Log and Database. **Arcade and Gaming**
| |-+  Monitor Repair Tech Support
| | |-+  NEOTEC NT-500DX Schematic		 0 Members and 2 Guests are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: NEOTEC NT-500DX Schematic  (Read 7879 times)
racergiant
Contributing Gold NLG Member
NLG Member 101 to 500 Post
*

Total Karma Storms: 105
Offline Offline

Gender: Male
Posts: 321
« on: September 16, 2008, 06:35:34 AM »
Started by aibudo -


NEOTEC NT-500DX Schematic

Have unusual vertical deflection problem with this unit.  The vertical will adjust properly, but it has oscillations occuring within the raster.  Horizontal black lines all over the screen, with the colorbar test pattern ok.  Have serviced monitors for several years but haven't seen this before.

Dennis
Logged
KirkLasVegas
Retired OLD Buzzard
Contributing Gold NLG Member
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 233
Offline Offline

Gender: Male
Posts: 1104


Newest addition to the family, RIP Bentley
« Reply #1 on: September 19, 2008, 01:40:18 PM »
Dennis,
Look at the power supply voltages at each chip with a scope. i suspect you will see rippling there due to a open power supply bypass cap and the digital noise is spreading thru the "Bus" on the board itself. You wont see this at the supply due to it's low impedance.Measure this on the "Vcc" pin of the chips in the vertical deflection area first. The verticle deflection circuits are power hogs.
Highly suspect ANY 1Mfd to 10Mfd electrolytics used as bypass caps, as they dry out and lose their value.

Kirk
Logged
Definition of "Retirement"= to be able to get back all you contributed into it AND take some of their money too before dropping dead.
FunExpo
Guest
« Reply #2 on: October 15, 2011, 01:35:55 PM »
I am having the a Similar Power issue mine did a blue tent to screen first then lost all power could you tell me where this Bypass cap is located I have metered across my Caps and all seem to be within Spec. for the cap. Any help would be appreciated have a great day..
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 0.114 seconds with 19 queries.