electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
TV service menu help.

 
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Equipment Repairs
View previous topic :: View next topic  
Author Message
bc5643
Guest





PostPosted: Tue Sep 04, 2007 2:01 pm    Post subject: TV service menu help. Reply with quote

Hi,

If I want to adjust the horizontal centering in the service mode is that all I need to do? I don't have to adjust anything else afterward?

I'm a little confused because of a manuel that lists several steps such as amplitude, vertical centering, vertical slope etc. as well. It also talks about 90° and 100°, test patterns and such. I just want to adjust the horizontal centering, can I do that without worrying about all that other stuff?

Thanks a lot.
Back to top
torbjorn



Joined: 07 Jun 2007
Posts: 370
Location: Sweden

PostPosted: Tue Sep 04, 2007 7:00 pm    Post subject: Reply with quote

The manuals are usually written for the case that the set is totally out of adjustment, i.e. as they can be if the eeprom was corrupted or after changing the CRT. But when only a touch-up of a single adjustment is needed, then go ahead with this adjustment and skip the other steps. However, it is always a good idea to look at a test card to make sure that all other adjustments are ok.
Note that many TVs get some horizontal displacement of the picture when supplying a RGB signal, if the centering was adjusted with composite (and vice versa). If you are using both kinds of signal and there is only one horizontal centering adjustment in the menu, then you must make a compromise.
If the TV has seen some years service, it is recommended to readjust the screen (Vg2) voltage and CRT cut-off according to the manual, as those adjustments always drift due to ageing of the CRT.
Back to top
View user's profile Send private message
bc5643
Guest





PostPosted: Fri Sep 07, 2007 9:12 pm    Post subject: Reply with quote

Thanks for the help!
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Equipment Repairs All times are GMT
Page 1 of 1

 
Jump to:  
You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Електроника София - Service Manuals Free Download - Prikachi - Service Diagrams

Free TV Schematics Download - HARDW.net - Pinout Master - Jabse Search - Jabse.InK  - Pulsator

Connector Pinout Forum - Новини - SnimkiOt.com - безплатен DNS - Whois разузнаване - Poblizo.com : пътешествия