Re: Colour classic dodgy display -- Welcome to the Colo(u)r Classic Forum

[ Show ]

Support VoyForums

[ Shrink ]

VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

[ Login ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, 4, [5], 6, 7, 8 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 07:06:41 11/19/01 Mon
Author: Chris
Subject: Re: Colour classic dodgy display
In reply to: Mark 's message, "Colour classic dodgy display" on 16:12:54 11/17/01 Sat

The diodes are almost certainly *not* the problem - IIRC, those same two diodes are in rather dodgy shape on one of mine as well ;)

The blue area in the corner is indicative of a degaussing problem; is your degaussing coil properly plugged in and powering up when the tube is powered on? You should hear kind of a transformer-sounding hum with a sort of "thunk" sound right when it comes on.

If the problem doesn't lie on the CRT-end PCB, I'd try tracing the wires from that board back to the main analogue board and seeing if there are any bad joints there. Measuring resistance (shouldn't be more than a few milliohms) across the joints and CRT neck connections might not be a bad idea either.

cl

[ Next Thread | Previous Thread | Next Message | Previous Message ]