Author Topic: k7401 horizontal offset problem (Read 1183 times)

castlesteve · « **on:** June 11, 2008, 07:22:16 am »

I have fixed quite a few of these 7401s, but this problem is confusing me

.

The picture is fine, but is pushed off to the right about 3 inches. No amount of horizontal position change will fix it. If I adjust the horizontal sync POT, I can get it to normal size, but then the images becomes erratic.

I've replaced the:
* all caps and any cold solder joints (no change)
* tried a new tube/yoke (no change)
* replaced neck board (no change)
* replaced remote control board (no change)
* replaced U701 (no change)

Only thing left I can see is q800, but no one ever talks about that guy.

UPDATE - I replaced q800... no change. Maybe I have some random resistor that went down around the horiz sync/size area.

Any other suggestions?

Ken Layton · « **Reply #1 on:** June 11, 2008, 10:24:32 am »

Sounds like you may need to telephone Welss-Gardner tech support.


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: k7401 horizontal offset problem (Read 1183 times)

castlesteve

k7401 horizontal offset problem

Ken Layton

Re: k7401 horizontal offset problem