Samsung CS6202NX/EIS, Service Manual

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4-10 Samsung Electronics
1. Warm up the receiver for at least 20 minutes.
2. Adjust the two tabs of the 4 pole magnets to
change the angle between them. Superimpose
the red and blue vertical lines in the center area
of the screen.
3. Adjust the Brightness and Contrast controls for
a well defined picture.
4. Adjust the two-tab pairs of the 4 pole magnets,
and change the angle between them.
Superimpose the red and the blue vertical lines
in the center area of the screen.
5. Turn the both tabs at the same time, keeping
the angle constant, and superimpose the red
and blue horizontal line in the center of the
screen.
6. Adjust the two-tab pairs of the 6-pole magnets
to superimpose the red and blue line onto the
green. (Changing the angle affects the vertical
lines, and rotating both magnets affects the
horizontal lines.)
7. Repeat adjustments 2~6, if necessary.
8. Since the 4-pole magnets and 6-pole magnets
interact, the dot movement is complex
(Fig. 4-3).
4-3-8 Center Convergence Adjustment
Fig . 4-3 Center Convergence Adjustment
RED
BLUE
BLUE
RED
4-Pole Magnet Movement
GREEN
RED/BLUE
RED/BLUE
GREEN
6-Pole Magnet Movement
4-3-9 VCO Adjustment
1. Connect to tuner IF pin.
2. Apply an IF input (38.9MHz) signal.
3. In Factory Mode, adjust the AFC with the VCO
tuning bits (AFA, AFB).
The VCO is correct when the AFA Bit is
"INSIDE WINDOW " (The AFB Bit is
above~below). The AFC output is available on
the I
2 C-BUS (used for VCO adjustment and
feedback).
4-3-10 IF AGC Adjustment
1. Input a UHF Band channel (70~80dB,
479.25MHz).
2. Adjust the AGC in the Factory mode.
IC201 Pin 53 to 3.2V ± 0.05V (DC).