Zanussi 22ZT907, Service Manual

Page: 35 / 64

ADJUSTMENT OF RGB LEVELS ON TELETEXT P.C.B
Adjustment must be carried out before adjustment".
1) Adjust and on R and G so that characters reach the 100 V DC
level.
2) Adjust on B so that the character reaches the 110 V DC level.
DC____
level)
Line blanking
DC G levels)
V DC
Fig. 2
After white adjustment visually inspect that white characters have
correct tint, otherwise, retouch one or two of the potentiometers
and (reducing amplitude of dominant so as to obtain
characters having correct white.