Focus Adjustment; Landing Adjustment - Sony TRINITRON BVM-14G1A Operation And Maintenance Manual

3-2. Focus Adjustment

1. Input the dot signal or cross hatch signal.
2. Set the following DF adjustment data to the center value
(128).
DF T&B
DF SIDE
DF CORNER
Note: The above adjustment menu is under the E
BOARD menu of the MAINTENANCE menu.
3. Adjust the center of the screen to the optimum focus us-
ing the FOCUS 1 VR (vertical focus adjustment) and
FOCUS 2 VR (horizontal focus adjustment).
4. Input the cross hatch signal.
5. Adjust the following DF adjustment data so that the cross
hatch lines at the ends of the screen become the same
thickness as those at the center of the screen.
DF T&B
DF SIDE
DF CORNER (fixed at value)
6. Adjust the DF data in the same way in the following
modes.
4:3 UNDERSCAN mode
16:9 NORMAL SCAN mode
16:9 UNDER SCAN mode
Focus 1
Focus 2
Fig. 1-1
3-2

3-3. Landing Adjustment

1. Input the white signal.
2. Press the BRIGHTNESS VR and CONTRAST VR but-
tons to the preset condition. [ The LEDs (green) on the
buttons go off. ]
3. Face the CRT screen towards the east (west) and press
the DEGAUSS button.
4. Set the Purity knob to the mechanical center.
14-inch model
Purity
6 poles magnet
4 poles magnet
(Fixed)
20-inch model
Purity
6 poles magnet
Fig. 1-2
5. Push the DY (deflection york) to the front as much as
possible.
6. Secure the neck assembly in the position shown in Fig.
1-3.
20-inch model
Neck assy
Fig. 1-3
Purity control
Purity control
14-inch model
Neck assy