Welcome, Guest. Please login or register.
April 30, 2024, 04:57:31 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
| | |-+  M21 Tatung cap blowed up reeeal good		 0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: M21 Tatung cap blowed up reeeal good  (Read 2567 times)
badbaud
NLG Member 101 to 500 Post
***

Total Karma Storms: 25
Offline Offline

Posts: 316
« on: June 26, 2011, 12:01:18 AM »
VT7827M21LH chassis.

C331 swelled up, tossed off it's covering and shut down this monitor.

Can't find a schematic for this particular version of Tatung monitor and was hoping someone knew what value this cap used to be or can give me a schematic... or both.
Logged
badbaud
NLG Member 101 to 500 Post
***

Total Karma Storms: 25
Offline Offline

Posts: 316
« Reply #1 on: June 27, 2011, 06:22:35 PM »
Looked at all of my other Tatung, Electrohome, and Toei schematics and the range of caps for that particular circuit were from 47uF to 150uF so I put in a 150uF 250V cap and the monitor came up with a beautiful picture. That circuit generates a negative voltage off of the FBT, probably for some kind of bias, and I guess if the FBT hiccups the cap gives up it's life.

Anyways, I could still use a schematic of this particular model if anyone can help.
Logged
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #2 on: June 27, 2011, 09:23:18 PM »
If that cap is off a tap of the flyback, check the diode that rectifies the power. It may be leaking negative voltage which will fry caps.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
badbaud
NLG Member 101 to 500 Post
***

Total Karma Storms: 25
Offline Offline

Posts: 316
« Reply #3 on: June 27, 2011, 11:52:19 PM »
The diode read fine with a diode checker (out of circuit) and I didn't have a replacement so I left it in.

Here's hoping it's not a leaker under load or the monitor will be back in the shop in a couple of months.
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 0.085 seconds with 19 queries.