Service Adjustments and Calibrations |
3.Set the White Balance pattern to over side the White Ba- lance Meter. Adjust the “G” high light to 80µA by changing
4.Then, adjust the “R” high light (DAC: C3) and the “B”
(DAC: C4) to zero on the White Balance Meter.
5.If the indication of the high light adjust on White Balance Meter still doesn’t get 80µ A, adjust the bright control to the maximum.
6.Check the White Balance Meter under side , if it isn’t property , readjust the low light on standard window.
If the error of “R” is ± 5µ A and “B” is 10µ A repeat the procedure 1 and 2.
7.Exit to the normal mode.
Note: Adjust the White Balance using equipment adjusted to colour temperature 10.800K° + 19MPCD.
COLOR KILLER VERIFICATION
PREPARATION:
1. Adjust the color control to level “50”.
PROCEDURE:
1.Apply a pattern signal with 40dB.
2.Verify to not appear color noises on any B/W channel.
3.Verify that the color doesn’t disappear on any color channel.
FILAMENT VOLTAGE CHECK UP
REQUIRED EQUIPMENTS / CONNECTIONS: RMS Voltmeter: CRT filament terminal.
PROCEDURE:
1.Apply crosshatch pattern.
2.The filament voltage must be:
SUB BRIGHT ADJUSTMENT
PREPARATION:
Adjust CONTRAST to maximum and BRIGHT to center.
PROCEDURE:
1.Apply standard SUB BRIGHT.
2.Adjust SUB BRIGHT (DAC: B2) to the central part of PART 6 and PART 7 become black.
(PART 7=Black and PART 6=lightly illuminated).
FOCUS ADJUSTMENT
PREPARATION:
1. Adjust CONTRAST to maximum and BRIGHT to center.
PROCEDURE:
1.Apply a MONOSCOPE or PHILIPS pattern.
2.Adjust the focus to the right side of draw below be best.
3.Adjust the focus, first on the center, and after on the “4“ region.
4
AUDIO VERIFICATION
PREPARATION : |
|
1. VOLUME | 1/3 of maximum |
2. TV SPEAKER SW | ON |
PROCEDURE:
1.Set a music or a external signal.
2.Move the volume control since minimum to maximum and verify if the change is soft.
3.Disconnect the speakers switch and verify if exist still sound on speakers.
AI SOUND VERIFICATION
REQUIRED EQUIPMENTS / CONNECTIONS: RF Generator: Input antenna terminal
RMS Voltmeter: TP83 |
| |
PREPARATION: |
| |
1. | AI SOUND | ON |
2. | VOLUME | MAXIMUN |
PROCEDURE:
1.Apply standard pattern with 1KHz audio modulated and 25KHz with 100% deviation.
2.Check if the output is : 240 ± 100mVrms.
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