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Alignment and Adjustments
4. Alignment and Adjustments
4-1 Adjustments
4-1-1 General Alignment Instructions
Usually, a color TV needs only slight touch-up adjustment upon installation. Check the basic
characteristics such as vertical size, horizontal size, and focus. Observe the picture and check for
good black and white details. There must be no objectionable color shading: If color shading is
present, demagnetize the receiver. If color shading persists, re-do purity and convergence adjustments.
Note :
1. This `4. Alignment and Adjustments' applies to K55A chassis applications.
2. AC Power Supply: 160~300V or 100~240V, 50Hz
3. This service manual has been written on the basis of domestic remote-control model adopting K55A
chassis. Depending on sales location and product specifications, some of specifications herein may
be changed.
4-1-2 Focus Adjustment
K55A contains a dynamic focus circuit. When CRT PCB, FBT or CRT is replaced, be sure to adjust in the
following sequence:
Dynamic Focus Adjustment
1. Input a crosshatch pattern.
2. Select "Standard" from the menu,
3. Turn the Static Focus VR clockwise to set it to its maximum.
4. Turn the Dynamic Focus VR counterclockwise to set it to its
maximum.
5. Turn the Static Focus VR counterclockwise slowly for the clearest
center vertical line.
After Adjustment
6. Turn the Dynamic Focus VR clockwise slowly for the clearest third line.
1
2
3
7. Check for the FOCUS of entire screen. If necessary, re-do adjustments 3~6.
Samsung Electronics 4-1
Alignment and Adjustments
4-1-3 Screen Voltage Adjustment
1. Input a Toshiba pattern.
2. Use an oscilloscope to identify RK, BK, GK. And then adjust FBT Screen VR so that the voltage of
pedestal level doesn't exceed 160V.
If a Toshiba pattern is not available, cancel the blue screen and input "No Signal" to AV IN so the voltage
of pedestal level doesn't exceed 175V.
If an oscilloscope is not available, use a DC multi-meter in No Signal (black screen) to adjust RK, BK, GK
so that the highest voltage becomes 160Vp-p.
4-1-4 White Balance Adjustment
1. Warm up the TV set for at least 30 minutes.
2. Enter the Service Mode by pressing the remote control keys in the following sequence:
Power Off