electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
no color in a vestel tv

 
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
thfixer
Guest





PostPosted: Tue Jun 16, 2009 10:14 pm    Post subject: no color in a vestel tv Reply with quote

Hello very one i have tv ,i think it is vestel, having processor st 92195c3b1/oEo+stv2247h+24c08a.there is no color ,sometimes it is color ,sometimes not.any one to help me with this ,thanks in advance.
Back to top
torbjorn



Joined: 07 Jun 2007
Posts: 370
Location: Sweden

PostPosted: Wed Jun 17, 2009 9:42 am    Post subject: Reply with quote

Do you have the same problem regardless of if the tv is receiving a RF signal or if you supply a composite or Y/C signal to the scart connector?

Check with a scope that the video signal at the input to the PAL decoder is in good order - correct amplitude of the color burst, no deformation of the burst or sync pulse etc.
If there is some switching circuitry for component type (Y/C or S-VHS) video signal, make sure that you have chroma signal at the right points after the switches.
Also, try alignment of the subcarrier oscillator according to the tv's service manual.
Back to top
View user's profile Send private message
thefixer
Guest





PostPosted: Wed Jun 17, 2009 12:39 pm    Post subject: no color in a vestel tv Reply with quote

I replaced stv2247h with stv 2246h and quartz ,so the color is stable: tv is ok now.
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


eServiceInfo on FB - Service Manuals Free Download - Service Diagrams

Free TV Schematics Download - HARDW.net - Pinout Master - Jabse Service Manual Search - Jabse.InK  - onTap.bg

SnimkiOt.com - Poblizo.com : пътешествия