Teletext Does Not Work; Cannot Display Video Signal From Tuner (Rf); Poor Tv Picture (Snow In The Picture) - Bang & Olufsen BeoVision 10-40 Service Manual

2.4 Fault flow chart
Fault symptom:

Teletext does not work

Possible causes:
PCB14, Main
PCB01, Tuner
Fault symptom:
Cannot display video signal from
tuner (RF)
Possible causes:
PCB01, Tuner
Fault symptom:

Poor TV picture (snow in the picture)

Possible causes:
PCB01, Tuner
Press TV and TEXT
on the remote
Replace PCB14,
control.
Does the TV switch
to teletext?
Check aerial
Does the TV show connection and TV
teletext correctly? signal strength.
Replace PCB01,
Teletext OK?
Check cable
connection
Replace cable or re-
between PCB14,
establish connection
Main and PCB01,
Tuner.
Connect a video source to AV2 (CVBS).
1: Press MENU
2: Select CONNECTIONS
3: Select AV2
4: Remember the selected source button, e.g.
V.AUX
5: Set HDMI = OFF
6: Set YPbPr = OFF
7: Press the selected source button, e.g. V.AUX
Is the picture OK?
Check aerial
connection and TV Replace PCB01,
signal strength.
OK?
Check TUNE AGC in
the Service Menu.
Must be set to:
BGDKI = 14
L = 13
Replace PCB01,
Tuner
Main
OK?
Replace PCB14,
Tuner.
Main
Go to page 2.7.
No video signal
from AV2 or AV3
(CVBS)
Tuner
No
Yes