tag:blogger.com,1999:blog-1120987647049297737.post3261310132525094656..comments2024-03-02T21:35:08.721+03:00Comments on electronics repair made easy: Troubleshooting CRT Television with HV (high voltage) is present but the screen is dark (blank)Humphrey Mndakahttp://www.blogger.com/profile/11910022657325511431noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1120987647049297737.post-81876730250345300372016-11-14T17:12:43.869+03:002016-11-14T17:12:43.869+03:00My TV keeps putting its self off after I watch for...My TV keeps putting its self off after I watch for 3-5 minutes interval, what's the problemAnonymoushttps://www.blogger.com/profile/06262415836740365998noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-27880912679671085232016-10-08T10:52:43.738+03:002016-10-08T10:52:43.738+03:00Hi Emma. universal power supply come with a manual...Hi Emma. universal power supply come with a manual, use that to sort out the issue.<br />Regards Humphrey<br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-34818766731853524312016-10-08T10:51:15.840+03:002016-10-08T10:51:15.840+03:00Well put George.
Regards HumphreyWell put George.<br /><br />Regards HumphreyHumphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-4022983032990533372016-10-07T23:43:42.712+03:002016-10-07T23:43:42.712+03:00i have a problem with my crt tv it had power probl...i have a problem with my crt tv it had power problem,and its only when the current is low it will come up while it was not so at frist, i will put it on and switch it off and i will have to wait for 2min or so for the red light(stand by)to flesh and thats the very moment i have to put it on if not it wont come up,i now bought universal power supply but dont know how to connect it please help Emma93https://www.blogger.com/profile/02502774433455352731noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-31857098758813134322016-10-07T19:15:29.696+03:002016-10-07T19:15:29.696+03:00This is an excellent first step to troubleshoot HV...This is an excellent first step to troubleshoot HV present screen dark. Relatively high current flows in the heater circuit. This serves to heat the joints on the crt neck board and heating and cooling eventually causes these joints to become "dry" Remember to use flux before re-soldering. Also eyeball the position of the screen adjustment pots. Expect them to be near center. If not suspect "unauthorized engineers" have been tampering with these adjustments. Take a quick voltage check on the screen pins of the CRT. George Phttps://www.blogger.com/profile/03678554936694431369noreply@blogger.com