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test card (numeric card).
a) Adjusting H-SHIFT value, let the picture horizontal center align at horizontal center of tube
screen.
b) Adjusting V-POSI value, let the picture vertical center align at vertical center of tube screen.
c) Adjusting V-SIZE value, let the picture vertical amplitude conform to requirement.
d) Adjusting V-LIN value, let the picture vertical linearity conform to requirement.
e) Adjusting V-SIZE value, let the heights of top and bottom panes of picture equal to that of
the center pane.
f) Adjusting OSD H DISPLAY value, let position of display bars (with number figures at side)
is symmetrical about right and left sides.
2. MENU4 for RF AGC adjustment
Receiving 60 dBu (1 mV) color bar signals, adjust AGC value (the voltage from high to low), let
the picture noise gradually reduced to level just aware.
3. MENU5 for adjustment of CRT cutoff, dark and Bright balance, and sub-brightness
After pre-heating the TV set fully, receive gray-white two-step signals.
a) Adjusting BT (brightness) value and CT (contrast) value, of FBT let the brightness of white
level and gray level of picture conform to conventional requirement of adjustment of
manufactory.
b) Select option to SC and press V+, then adjust Screen potentiometer of FBT, let a dim
mono-color (one color of red, green and blue, sometimes may lean to yellow, violet or white)
horizontal light line display on screen. Remember this color, press the numeric key 1, 2, 5, 6, 9,
0, let the horizontal light line become to white, then adjust SCREEN potentiometer again, let
the horizontal light line become to just can visible.
c) Select option to RB, GB and BB, and adjust RB, GB and BB values, let the gray color
temperature meet the requirement.
d) Select option to RD, GD and BD, and adjust RD, GD and BD values, let the white color
temperature meet the requirement.
e) Repeat c) and d) steps, let both gray and white temperature simultaneously meet the
requirement.
f) Receiving black-white 8-step signals, adjust SB (sub-brightness) value, let the difference
between first step and second (the most dim) step can just distinguish.
3.2.4 Checking x-ray protective circuit
a) Short-circuit jumperTP2001 and TP2002, activate protective circuit.
b) Remove the short circuit wires, and then press CH+ or CH- key, TV set startup again.
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