Alignment and Adjustments
Samsung Electronics
5-1
5. Alignment and Adjustments
5-1 FBT B+ Voltage Adjustment
PREPARATION
1. Note: The B+ voltage adjustment (FBT) is
done during the chassis check at the factory.
Perform this adjustment after Sub-Brightness
and Convergence.
2. Warm up the TV for at least for 10 minutes.
3. Input 100% white pattern.
4. Select the ÒSTANDARDÒ video mode.
ADJUSTMENT
1. Connect the leads of a multimeter to GTP29
(B
+
) and GTP30 ( G).
2. Set VR401 (on deflection board) to either 126V
(for NTSC), or 125V (for PAL).
5-2 Lens Focus and Static Focus Adjustment
5-2-1 Static Focus (Electric Focus)
PREPARATION
1. Select the ÒSTANDARDÒ video mode.
2. Input a crosshatch pattern.
3. Cover the lenses that are not being adjusted.
4. Connect a convergence jig and read data.
5. Adjust the lens for best focus.
ADJUSTMENT
Vary the focus pack VR (Red, Blue) on the
front cabinet. Adjust the TV for best possible
focus around the center of the crosshatch
pattern, without losing overall screen balance.
P
L1
L2
RED ABERRATION BLUE ABERRATION
L1, L2 < P
_
Examine these points together
Fig. 5-1 Crosshatch Pattern.
Fig. 5-2 Color Aberration
Summary of Contents for SP434JMFX/SAP
Page 2: ...ELECTRONICS Samsung Electronics Co Ltd MAR 1999 Printed in Korea 3SPT52A 2403 ...
Page 60: ...PCB Layout Diagram 10 4 Samsung Electronics 10 4 PCB CRT 10 5 PCB V M 10 6 PCB CONV ...
Page 65: ...Schematic Diagrams 12 3 Samsung Electronics 12 3 MAIN 3 Power Line Signal Line ...
Page 69: ...Schematic Diagrams 12 7 Samsung Electronics 12 7 MAIN PIP Power Line Signal Line ...
Page 72: ...Schematic Diagrams 12 10 Samsung Electronics 12 10 MAIN CRT A V FRONT Power Line Signal Line ...
Page 74: ...Schematic Diagrams 12 12 Samsung Electronics 12 12 MAIN CONV MDL Power Line Signal Line ...
Page 75: ...Schematic Diagrams 12 13 Samsung Electronics 12 13 MAIN D F V M Power Line Signal Line ...
