Main Restorations Software Audio/Jukebox/MP3 Everything Else Buy/Sell/Trade
Project Announcements Monitor/Video GroovyMAME Merit/JVL Touchscreen Meet Up Retail Vendors
Driving & Racing Woodworking Software Support Forums Consoles Project Arcade Reviews
Automated Projects Artwork Frontend Support Forums Pinball Forum Discussion Old Boards
Raspberry Pi & Dev Board controls.dat Linux Miscellaneous Arcade Wiki Discussion Old Archives
Lightguns Arcade1Up Try the site in https mode Site News

Unread posts | New Replies | Recent posts | Rules | Chatroom | Wiki | File Repository | RSS | Submit news

  

Author Topic: Repairman replaced my flyback, but why did he do this?  (Read 2331 times)

0 Members and 1 Guest are viewing this topic.

rholdenl

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 5
  • Last login:May 14, 2015, 04:15:36 pm
  • I want to build my own arcade controls!
Repairman replaced my flyback, but why did he do this?
« on: March 26, 2015, 06:56:09 pm »
http://imgur.com/a/GdDIm

I have a strange wave in my screen and I think this may be the reason. Can anyone shed some light on the possible reasons for doing this? Should I undo it to fix the wave in the screen?


pbj

  • Trade Count: (+4)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 11057
  • Last login:Yesterday at 11:13:12 pm
  • Obey.
    • The Chris Burke Band
Re: Repairman replaced my flyback, but why did he do this?
« Reply #1 on: March 26, 2015, 06:59:57 pm »
Lol holy crap.  I thought that was an urban legend.

 :laugh2:

rholdenl

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 5
  • Last login:May 14, 2015, 04:15:36 pm
  • I want to build my own arcade controls!
Re: Repairman replaced my flyback, but why did he do this?
« Reply #2 on: March 26, 2015, 07:03:42 pm »
Lol holy crap.  I thought that was an urban legend.

 :laugh2:

What do you mean?

The flyback is a DNF-FL2701
and the chassis is a CGM2500

That would probably help.

Here's pictures of the original schematic vs changes made by the repair man.
https://imgur.com/a/iD21u
« Last Edit: March 26, 2015, 09:48:16 pm by rholdenl »

jennifer

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 2895
  • Last login:August 11, 2023, 06:24:58 am
Re: Repairman replaced my flyback, but why did he do this?
« Reply #3 on: March 26, 2015, 10:51:58 pm »
    Apparently he made a homemade ferrite coil (The wires wrapped around that magnet), That very well could be your problem.

ed12

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 3972
  • Last login:March 31, 2018, 03:44:39 pm
  • it is what it is..."Nobody Said It Was Easy"....
Re: Repairman replaced my flyback, but why did he do this?
« Reply #4 on: March 26, 2015, 11:03:10 pm »
it was used to boost heater current/voltage
was called a :booster: in it's day
means the fly-back is wrong ? / not providing proper voltage/current
or the tube is gunning down
in short it is a way to boost the tube

out come is not good for the tube

ed
Shipping something from the U.S. to Canada for repair/exchange?  Please use USPS to avoid (additional?/excessive?) shipping charges.  PM me if you have any questions.

rholdenl

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 5
  • Last login:May 14, 2015, 04:15:36 pm
  • I want to build my own arcade controls!
Re: Repairman replaced my flyback, but why did he do this?
« Reply #5 on: March 26, 2015, 11:15:04 pm »
Do  you guys think it would harm anything to undo it, fix the traces, and fire it up? What should the voltage be normally?

Ken Layton

  • Guru
  • Trade Count: (+1)
  • Full Member
  • ****
  • Offline Offline
  • Posts: 7061
  • Last login:October 12, 2021, 12:25:59 am
  • Technician
Re: Repairman replaced my flyback, but why did he do this?
« Reply #6 on: March 26, 2015, 11:18:59 pm »
That mod was done because your tube has a short in it that could not be removed with a rejuvenator. This mod isolates the tube filaments from ground. This is a common way to save a bad tube.

I've done this many times.

ed12

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 3972
  • Last login:March 31, 2018, 03:44:39 pm
  • it is what it is..."Nobody Said It Was Easy"....
Re: Repairman replaced my flyback, but why did he do this?
« Reply #7 on: March 26, 2015, 11:29:05 pm »
to many times
tube is toast

ed
Shipping something from the U.S. to Canada for repair/exchange?  Please use USPS to avoid (additional?/excessive?) shipping charges.  PM me if you have any questions.

jennifer

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 2895
  • Last login:August 11, 2023, 06:24:58 am
Re: Repairman replaced my flyback, but why did he do this?
« Reply #8 on: March 26, 2015, 11:40:14 pm »
   **I bet my Beltron could blow some chunks out of that tube**  Ken that's an interesting take,( never tried that) wouldn't that require a swamp to stabilize the circuit?  But to me Id still be thinking, Magnetic interference, or the underpowered fly back given the problem manifests itself in waves.... OP: Finding out if that's the right coil for that tube would be a good place to start.

rholdenl

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 5
  • Last login:May 14, 2015, 04:15:36 pm
  • I want to build my own arcade controls!
Re: Repairman replaced my flyback, but why did he do this?
« Reply #9 on: March 26, 2015, 11:47:47 pm »
According to this website, it's the right one for the chassis.

http://www.arcadecup.com/

ed12

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 3972
  • Last login:March 31, 2018, 03:44:39 pm
  • it is what it is..."Nobody Said It Was Easy"....
Re: Repairman replaced my flyback, but why did he do this?
« Reply #10 on: March 26, 2015, 11:54:08 pm »
it is this simple

the tube is bad
the tube is bad

ed
Shipping something from the U.S. to Canada for repair/exchange?  Please use USPS to avoid (additional?/excessive?) shipping charges.  PM me if you have any questions.

jennifer

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 2895
  • Last login:August 11, 2023, 06:24:58 am
Re: Repairman replaced my flyback, but why did he do this?
« Reply #11 on: March 26, 2015, 11:55:55 pm »
 +1
 +1

rholdenl

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 5
  • Last login:May 14, 2015, 04:15:36 pm
  • I want to build my own arcade controls!
Re: Repairman replaced my flyback, but why did he do this?
« Reply #12 on: March 27, 2015, 01:04:24 am »
Well, thank you guys for the help. It looks like I'll be getting a scanline generator and a 25" LCD.

pbj

  • Trade Count: (+4)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 11057
  • Last login:Yesterday at 11:13:12 pm
  • Obey.
    • The Chris Burke Band
Re: Repairman replaced my flyback, but why did he do this?
« Reply #13 on: March 27, 2015, 11:32:59 am »
I read about people supposedly doing that right before they dragged a game with a dim tube to Super Auctions 15 years ago but I didn't think anyone actually bothered. 

Isolating the filaments from ground is a new one on me, but I'll defer to Ken's experience.



jennifer

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 2895
  • Last login:August 11, 2023, 06:24:58 am
Re: Repairman replaced my flyback, but why did he do this?
« Reply #14 on: March 27, 2015, 12:44:51 pm »
    I would imagine a brightener is the same come concept.