Chroma 19053 - Ground Continue Calibration; Contrast Calibration

Calibration Procedure
IRR Range2 (100MΩ) ; resistor of IR to 100.0Ω
IRR Range3 (10MΩ) ; resistor of IR to 10.0MΩ
IRR Range4 (10MΩ) ; resistor of IR to 10.0MΩ
Change the dummy load resistor to 1GΩ.
press [UP] key
display IRR Range1 (1GΩ) ; resistor of IR to 1GΩ
press [STOP] [START] ; read the IRR value
; example 1GΩ
press [UP] or [DOWN] key until display 1000MΩ
press [STOP] ; stop IRR Range1 calibration.
Change the dummy load resistor to 100MΩ.
press [UP] key
display IRR Range2 (100MΩ) ; resistor of IR to 100MΩ
press [STOP] [START] ; read the IRR value
; example 100.0MΩ
press [UP] or [DOWN] key until display 100.0MΩ
press [ENTER] for saving calibration value.
press [STOP] ; stop IRR Range2 calibration.
Change the dummy load resistor to 10MΩ.
press [UP] key
display IRR Range3 (10MΩ) ; resistor of IR to 10MΩ
press [STOP] [START] ; read the IRR value
; example 10MΩ
press [UP] or [DOWN] key until display 10.00MΩ
press [STOP] ; stop IRR Range3 calibration.
Change the dummy load resistor to 10MΩ.
press [UP] key
display IRR Range4 (10MΩ) ; resistor of IR to 10MΩ
press [STOP] [START] ; read the IRR value
press [UP] or [DOWN] key until display 10.00MΩ
press [ENTER] for saving calibration value.
press [STOP] ; stop IRR Range4 calibration.
8.6 Ground Continue Calibration
1. Press [UP] key.
2. Connect resistance (0.8 ohm) to CONT. CHECK OPTION of rear panel and grounding
terminal. Press [STOP] [START] to adjust 1 ohm in rear panel, calibrate VR to critical
point of PASS and FAIL.
3. Press [STOP] twice.
8.7 Contrast Calibration
1. Press [UP] key.
2. Press [SETUP] key.
8-7
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