Camera Adjustments - JVC GY-HM790U Service Manual

4.5

CAMERA ADJUSTMENTS

4.5.1 Encoder adjustment
Vectorscope settings as follows.
Saturation: 75%, SET UP: 7.5%
Measuring
No. Item Instruments &
Input Signals
1 Preparation
2 27MHz CAM Frequency
adjustment counter
3 Composite Waveform
Y level monitor
adjustment (Oscilloscope)
4 Component Waveform
Y level monitor
adjustment (Oscilloscope)
1-18 (No.HC034<Rev.001>)
Measuring Point (A)
Mode Adjustment Points (B)
Adjustment Level (C)
ADJUST MENU (C)60(NTSC)
No.1 "VIDEO
MODE
CHANGE"
ADJUST MENU (A)Pb OUT
No.2 "27MHZ (B)[Cross-Shaped]
CAM" (UP/DOWN)
button
(C)27MHz ± 30Hz
ADJUST MENU (A)Y/VIDEO OUT
No.3 "CPS Y GAIN" (75Ω terminated)
(B)[Cross-Shaped]
(UP/DOWN)
button
(C)Y level
1.0Vp-p
ADJUST MENU (A)Y/VIDEO OUT
No.4 "CPN Y GAIN" (75Ω terminated)
(B)[Cross-Shaped]
(UP/DOWN)
button
(C)Y level
1.0Vp-p
Adjustment Procedure
(1) Select ADJUST MENU No.1, "VIDEO MODE
CHANGE"
(2) If system is not in [60](NTSC), select the
"60"and press the [Set] button.
(The camcoder will reboot automatically)
(1) Select ADJUST MENU No.2 "27MHZ CAM".
(2) Push the [Set] button so that "*" lighting, and
then push the [Cross-Shaped](UP/DOWN)
button to adjust to the specified value.
(3) Push the [Set] button to store the adjustment.
(1) Select ADJUST MENU No.3 "CPS Y GAIN".
(2) Push the [Set] button so that "*" lighting, and
then push the [Cross-Shaped](UP/DOWN)
button so that the Y level is as specified.
(3) Push the [Set] button to store the adjustment.
(1) Select ADJUST MENU No.4 "CPN Y GAIN".
(2) Push the [Set] button so that "*" lighting, and
then push the [Cross-Shaped](UP/DOWN)
button so that the Y level is as specified.
(3) Push the [Set] button to store the adjustment.