Panasonic WV-CF224 Service Manual page 9

(1). FSC Adjustment
Test Point: Pin 3 of IC5 (28MHz)
8 Confirm that the Synchronization Mode Selector (on the
SW Board SW1) is set to INT Position.
8 Connect the Frequency Counter to Pin 3 of IC5.
8 Adjust data with the ARROW keys so that the Subcurrier
Frequency becomes 28.63636 MHz ± 40 Hz.
8 Press the ENTER key for next adjustment.
(3). ALC Level Adjustment
Test Point: Pin 1 of CN2 (CDS OUT)
8 Keep the Color Temperature at 3 200°K.
8 Aim the Camera at the Logarithmic Gray Scale Chart.
8 Connect the Oscilloscope to Pin 1 of CN2.
8 Adjust data with the ARROW keys so that the CDS OUT
signal level becomes 300 mV ± 30 mV as shown in Fig.
4-2.
Fig. 4-2
8 Press the ENTER key for next adjustment.
(4). AGC OFF Gain Adjustment
Test Point: Pin 3 of CN2 (AGC OUT)
8 Keep the Color Temperature at 3 200°K.
8 Aim the Camera at the Logarithmic Gray Scale Chart.
8 Connect the Oscilloscope to Pin 3 of CN2.
8 Adjust data with the ARROW keys so that the AGC OUT
signal level becomes 300 mV ± 30 mV as shown in Fig.
4-3.
Fig. 4-3
8 Press the ENTER key for next adjustment.
(5.1). OB Level Adjustment
Sensor Board Test Point:
8 Connect the terminated Oscilloscope with 75Ω to Video
8 Adjust data with the ARROW keys so that the Pedestal
Sensor Board
8 Press the ENTER key for next adjustment.
(5.2). Video Output Gain Adjustment
300 mV ± 30 mV
Test Point:
8 Keep the Color Temperature at 3 200°K.
8 Aim the Camera at the Logarithmic Gray Scale Chart.
8 Connect the terminated Oscilloscope with 75Ω to Video
8 Adjust data with the ARROW keys so that the Video sig-
Sensor Board
8 Press the ENTER key for next adjustment.
300 mV ± 30 mV
(5.3). OB Confirmation (Don't Change Data)
8 Press the ENTER key for next adjustment.
2-5
Video Output Connector
Output Connector.
level becomes 50 mV ± 10 mV as shown in Fig. 4-4.
Fig. 4-4
Video Output Connector
Output Connector.
nal level becomes 714 mV ± 50 mV as shown in Fig. 4-5.
Fig. 4-5
50 mV ± 10 mV
714 mV ± 50 mV