< Back

This set incorporates teletext reception facilities. The
teletext display is good, but on picture the white goes out of
focus when a white line or letters or a very bright scene is
present. The whites are perfect if the contrast control is
reduced to a very low setting.
Set the a.g.c. preset control R318 for 3.3V ± 0.3V at the
anode of the tuner a.g.c. delay diode D2, with a test card F
input of about lmV. Then check the beam limiter circuit, by
confirming that the voltage at the cathode of D3 swings
from 0.8V to 3.2V over the range of the brightness control.
Finally, set the focus control R100 for optimum definition
of the highlights.

Table of Contents

Leave a comment

I have read the privacy policy and accept
Read our privacy policy

This form collects your name, email and content so that we can keep track of the comments placed on the website. For more info check our privacy policy where you will get more info on where, how and why we store your data.

This site uses Akismet to reduce spam. Learn how your comment data is processed.