Grey Scale Adjustment - Sanyo C14EA80 Service Manual

4. Connect digital V-meter to R351.
TU-AFT ADJUSTMENT
1. Tune the receiver to the clearest station.
2. By using L230, adjust AFT to obtain the best picture.
AGC ADJUSTMENT
GREY SCALE ADJUSTMENT
{SCREEN VR ADJUSTMENT]
3. Set SW220 to "SERVICE" position.
4. Set VR601and VR611 to be mechanical center.
6. Set screen VR for one colour to be just visible.
[BIAS VR ADJUSTMENT]
[DRIVE VR ADJUSTMENT}
9. By using VR601 and VR611, adjust white balance.
HIGH VOLTAGE & WIDTH CONFIRM
[HIGH VOLTAGE CONFIRM]
1. Tune the receiver to PAL circular pattern.
2. Set brightness and contrast controls to normal.
4.
[H-WIDTH CONFIRM]
5. If H-width is too wide or narrow, connect or disconnect AJ1.
6. Reconfirm high voltage.
H-CENTER ADJUSTMENT
1. Tune the receiver to PAL circular pattern.
2. Adjust H-center by using VR401.
V-SIZE ADJUSTMENT
1. Tune the receiver to PAL circular pattern.
2. Adjust V-size by using VR431.
FOCUS ADJUSTMENT
By using FOCUS VR, adjust focus control for well scanning
lines.