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: Where to test B+ on this Sharp Image chassis? Also, any info on it?  (Read 1368 times)

0 Members and 1 Guest are viewing this topic.

kcorcoran

  • Trade Count: (-1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 142
  • Last login:March 15, 2023, 11:59:18 pm
Helping a friend bring this monitor back from the dead.
No neck glow, fuses were good.
Figured I'd do a cap kit, but one couldn't be found.

Took some high res pictures to make a cap map and saw that B+ solder joint was cracked all the way around.

Reflowed both boards and it fired right up, decent pic once I got the hold and linearity pots dialed in and the screen on the flyback turned down.
Bottom looks a little squished but there's a jumper for 'narrow' or 'wide' on the board which might effect that, and I haven't toughed the H width coil yet.

I put together a cap list so I can replace the clearly original caps even thought visually they look ok.

Now, I'd like to check the B+ but not sure where to measure it.

Clearly the VR801 adjusts it and I'm assuming the words "ADJ 115 V" might mean what it's supposed to be set at.

Since there's no documentation on this, that's all I have to go on.


Cap list is anyone is interested...

SI-444TW

1uF 50v - C307, C406, C409, C410
4.7uF 50v - C907 (bipolar)
4.7uF 160v - C421
10uF 50v - C107, C107
22uF 50v - C392
33uF 25v - C109
47uF 25v - C1010, C102, C103, C401
47uF 35v - C906, C809
100uF 16v - C302, C305
100uF 35v - C393
100uF 160v - C817, C818
220uF 16v - C104
220uF 25v - C810
220uF 400v - C815
330uF 25v - C420
330uF 50v - C901
470uF 25v - C394
1000uF 16v - C905
1000uF 25v - C106, C398
1000uF 35v - C326
« Last Edit: April 22, 2021, 07:49:25 pm by kcorcoran »

kcorcoran

  • Trade Count: (-1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 142
  • Last login:March 15, 2023, 11:59:18 pm
Re: Where to test B+ on this Sharp Image chassis? Also, any info on it?
« Reply #1 on: April 22, 2021, 07:44:01 pm »
Pic a little squashed on the left side.