barreling distortion, and achieve the best pincushion correction.
(6) Use factory special remote controller for adjustment (V.), point it to the baseboard
infrared receiver and press S-PVOC button. Then the factory-assembled color TV
displays AFT (dark field)---AFT OK (with signal or noise), intermediate frequency
detection (38.9MHz) adjustment.
3. Baseboard testing method:
(1) Connect the main baseboard to a 25
″
factory-assembled color TV set, and connect the
company’s adjusting signal.
(2) Switch on the 150V~250V main power supply, press the P+, P- button on user’s remote
controller to check the grid, electronic circle, color bar, test pattern (without color),
three primary colors, color test card signals on position number 0, 1, 2, 3, 4, 5
respectively. It is required that no program is missed, otherwise use auto search or
manual search to have all the signals received.
(3) Receive the color test card signal. When you adjust the control of volume, contrast,
brightness, color saturation, clarity, the sound and picture shall change accordingly.
(4) To test the TV mode, use remote controller to select the system menu and have Color
PAL, SECAM, Sound D/K, B/G displayed respectively on the menu screen.
(5) To test the AV input, press TV/AV button and the picture signals
TV-VIDEO1-S-VIDEO2 will be displayed successively. If the corresponding video,
S-terminal input signals are detected by the oscilloscope, then the picture and sound of
the factory-assembled TV set shall be proper.
Summary of Contents for 21F99
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