Riddled TV Repair Forum
Service Menu and Manual Schematics
 
   
 FAQFAQ   SearchSearch   RegisterRegister 
   Log inLog in 
Toshiba CF3564B Blue Screen    
Post new topic   Reply to topic    Riddled TV Repair Forum Index -> TV Repair
 
Author Message
AMX



Joined: 19 Jan 2010
Posts: 2
Location: NS, Canada

PostPosted: Tue Jan 19, 2010 6:02 pm    Post subject: Toshiba CF3564B Blue Screen Reply with quote

Toshiba 35" TV
Model CF3564B

First off, I am an Electronics Engineering Technician, and feel quite confident with repairing electronics myself, however I have very limited experience with TV's, so help from you guys would be great!!

I have been having issues lately whereby when I first turn it on, I am only getting a blue screen, faintly showing the picture with shades of blue. Also, there is a horizontal line pattern shown (assuming from the electron gun). After a few minutes, the TV will 'kick in' and all colors will be shown. I have dealt with this for a while, but now it seems to be taking longer each time I turn it on.

I love this TV, and bought it a while back for cheap. Even though it is getting old, it has a great picture and works great once 'warmed up'.

Any help is greatly appreciated!
Google

PostPost subject: Advertisement

JTS1957



Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away

PostPosted: Tue Jan 19, 2010 6:33 pm    Post subject: Reply with quote

Note and monitor the DC voltage on the blue cathode at its CRT socket pin. When the set acts up, note the voltage reading (should change dramatically). Carefully unplug the CRT board from the CRT while the set is still playing as you watch the voltage. If the voltage reading returns to what it was when the set was working normally - has bad CRT. If doesn't change - has a problem on CRT board (or main chassis). Could also CAREFULLY TAP CRT neck glass to see if will make it act up (or clear up).
AMX



Joined: 19 Jan 2010
Posts: 2
Location: NS, Canada

PostPosted: Wed Jan 20, 2010 7:42 pm    Post subject: Reply with quote

I haven't had a chance yet to measure the voltages, however here is a picture for reference:

Display posts from previous:   
Post new topic   Reply to topic    Riddled TV Repair Forum Index -> TV Repair All times are GMT - 6 Hours
Page 1 of 1

 


Disclaimer: All information provided by RiddledTV is strictly for information purposes only. Please observe all warnings displayed on your electronic
devices. This information should only be used to help diagnose work, and all service should be performed by a qualified technician.
Privacy Policy       Copyright © 2020 RiddledTV.com       Advertise on RiddedTV.com