Haier 21F8D-S Service Manual - Page 27

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1. +B: 115±0.3V adjustment. 1) Switch on the power and connect PAL circular signals to the tuner. 2) Adjust variable resistor RP501 until the voltage of the main power is 115±0.3V. 2. Screen voltage adjustment. 1) Switch on the power and receive PAL system circular signal. Warm up the TV set for 15 min. 2) Enter the adjustment D state. Press the "-/--" button, then a bright horizontal line appears. Adjust screen potentiometer to let the horizontal line just appears. 3. Focus adjustment. 1) Receive electronic circular signal. 2) Set picture mode on standard mode. 3) Adjust focus potentiometer until the optimum picture is achieved. 4. White balance adjustment. 1) Set the picture mode on standard mode. 2) Enter the D state and adjust RCUT, GCUT, BCUT, GDRV and BDRV. 3) Coordinate of reference white color: (X=0.281, Y=0.311). 6. Adjustment of horizontal and vertical position and size. 1) Switch on the power and connect the signals to the tuner to receive PAL/NTSC system circular signal. 2) Enter the D state. Adjust HPOS to change the horizontal position and VP50 to change the vertical position. Adjust HIT to change the vertical size until the vertical size is 90-92%. Horizontal size is related to the capacitor C416. Hold the horizontal size is 90-92%. 8. Adjustment of character positions Adjust OSD for the horizontal positions of the screen menu. 13. Exploded View Exploded View 27

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1. +B: 115
±
0.3V adjustment.
1)
Switch on the power and connect PAL circular signals to the tuner.
2)
Adjust variable resistor RP501 until the voltage of the main power is 115
±
0.3V.
2. Screen voltage adjustment.
1)
Switch on the power and receive PAL system circular signal. Warm up the TV set for 15 min.
2)
Enter the adjustment D state. Press the “-/--” button, then a bright horizontal line appears. Adjust
screen potentiometer to let the horizontal line just appears.
3. Focus adjustment.
1) Receive electronic circular signal.
2)
Set picture mode on standard mode.
3)
Adjust focus potentiometer until the optimum picture is achieved.
4.
White balance adjustment.
1)
Set the picture mode on standard mode.
2)
Enter the D state and adjust RCUT, GCUT, BCUT, GDRV and BDRV.
3)
Coordinate of reference white color: (X=0.281, Y=0.311).
6.
Adjustment of horizontal and vertical position and size.
1)
Switch on the power and connect the signals to the tuner to receive PAL/NTSC system circular
signal.
2) Enter the D state. Adjust HPOS to change the horizontal position and VP50 to change the
vertical position. Adjust HIT to change the vertical size until the vertical size is 90-92%.
Horizontal size is related to the capacitor C416. Hold the horizontal size is 90-92%.
8.
Adjustment of character positions
Adjust OSD for the horizontal positions of the screen menu.
Exploded View
13.
Exploded View
27