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Main => Monitor/Video Forum => Topic started by: darkmavis on January 31, 2005, 02:51:35 pm

Title: any monitor experts in the uk ?
Post by: darkmavis on January 31, 2005, 02:51:35 pm

as im really having trouble finding someone to fix my monitor!   im in the north west! anyone help me out??

Title: Re: any monitor bods in uk ?
Post by: RayB on January 31, 2005, 07:12:10 pm

What is a bod?

Title: Re: any monitor bods in uk ?
Post by: darkmavis on January 31, 2005, 07:30:45 pm

an expert :D

Title: Re: any monitor experts in the uk ?
Post by: Silver on January 31, 2005, 07:35:02 pm

Is this a "I need an expert to come visit" or could you describe the problem?

Title: Re: any monitor experts in the uk ?
Post by: darkmavis on January 31, 2005, 08:04:45 pm

im having no luck finding a repair guy (im in the uk) my monitor likes like this but the other way round vertical not horizintal
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=28520.0;id=7762;image)

i can see the picture  in the line (if that makes sence) and the controls work (i.e. brightness contrast ect)
my monitor is  Wells-Gardner 25k7181.

Title: Re: any monitor experts in the uk ?
Post by: wakerlet on February 01, 2005, 12:09:33 pm

Hey!

Title: Re: any monitor experts in the uk ?
Post by: Ken Layton on February 01, 2005, 12:31:45 pm

The k7000 series used 5 different vertical deflection IC chips over the course of the production run. Randy Fromm's site (www.randyfromm.com) on his technical dept page under Monitors -> Which Chip Is Which explains the differences and what chips are supposed to go with what version.

Before declaring the vertical IC bad though be sure to test or replace tantalum electrolytic capacitor C51 (behind the "50/60 Hz trimpot") first as this cap is now failing alot and is NOT included in the capkits (it should be IMO). The value of C51 is critical and when it drifts off value slightly will cause vertical height distortions or stretch/squash problems. If the cap goes completely open circuit (or near open circuit) you will lose all vertical deflection.

See also www.jstookey.com/arcade/WG_25k7191/  for more information on the 71xx series of monitors.

Title: Re: any monitor experts in the uk ?
Post by: wakerlet on February 01, 2005, 12:50:06 pm

You are the man Ken!

Title: Re: any monitor experts in the uk ?
Post by: MrWhippy on February 06, 2005, 12:07:27 pm

there is a firm in bury, lancashire that do monitor repairs - http://www.ccc-uk.com/index.htm.

haven't used them so can't recommend but if you're anywhere near, might be worth dropping them a mail.