Sony Trinitron KV-25FX20A Service Manual page 22

BELL FILTER ADJUSTMENT (Secam models only)
Note : Ensure that the TV set has been powered up for at least
1 minute to allow for drift before carrying out the following
adjustment.
1. Input a video SECAM Colour Bar signal via AV1.
2. Connect an oscilloscope to pin 1 of CN504 [R-OUT] on the
A board.
3. Enter into the 'Picture' menu and select 'Bell-f0'.
4. Decrease the register of 'Bell-f0' until the following waveform
change between RED and BLUE is obtained.
Before adjustment
5. When the correct waveform has been obtained add an
additional 7 steps to the register.
DEFLECTION SYSTEM ADJUSTMENT
1. Enter into the 'Geometry' service menu.
2. Select and adjust each item in order to obtain the optimum
image.
GEOMETRY
V centre
V size
V Lin
S Corr
H Cent
H Size
Pin Amp
Upper Pin
Lower Pin
Upper V lin
Lower V lin
Pin Phase
V Bow
V Angle
Upper V Lin
Lower V Lin
Left HBLK
Right HBLK
CD Mode (AV)
EHT-comp
After adjustment
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
07
07
01
12
22
V SIZE
V LIN
S CORRECTION
V CENTRE
H CENTRE
H SIZE
PIN AMP
PIN PHASE
CORNER PIN
V ANGLE