JVC GY-HM150U Service Manual page 17

Measuring
No. Item Instrument &
Input Signal
5 Minimum/ • Oscilloscope
Maximum • Light box
gain • Collimator
• ND filter
(ND0.3 ×
2pcs)
(or ND0.6 fil-
ter)
6 AF filter • Light box
• Collimator
• ND filter
(ND1.5)
• ND filter
(ND0.3)
Measuring Point (A)
Mode Adjustment Point (B)
Adjustment Level (C)
EE/Video mode (A)COMPONENT OUT (Y)
[Minimum gain]
(B) 60 Hz(NTSC)
:12C2h,12C3h
50 Hz(PAL): 62C2h,62C3h
[Maximum gain]
(B) 60 Hz(NTSC)
:12C4h,12C5h
50 Hz(PAL): 62C4h,62C5h
(C)0.70±0.03Vpp
EE/Video mode (A)---
(B)60 Hz(NTSC): 13A0h to
13A3h
(C)Automatic adjustment
(B)50 Hz(PAL) :63A0h to
63A3h
(C)Automatic adjustment
Adjustment Procedure
• Adjust in both 60 Hz(NTSC) and 50 Hz(PAL).
• Adjustment is performed only for the minimum
gain. The value of the minimum gain+1F6h is
written as the maximum gain.
[60 Hz(NTSC) adjustment]
(1) Attach the collimator (without chart) to the
camera lens.
(2) Attach the two ND0.3 filters (or one ND0.6
filter), then shoot the light box.
(3) The component Y output adjusts to the
specified value.
[50 Hz(PAL) adjustment]
(4) Adjust the component Y output to the
specified value in the same way as the
procedure (3).
• Adjust in both 60 Hz(NTSC) and 50 Hz(PAL).
[60 Hz(NTSC) adjustment]
(1) Attach the collimator (without chart) to the
camera lens.
(2) Attach the ND1.5 filter, then shoot the light
box.
(3) After the start of the adjustment, the ad-
justment on the AGC ON is completed,
and the confirmation screen for the con-
tinuing adjustment is displayed.
(4) Change the filter from ND1.5 to ND0.3,
then click OK. (Adjustment of AGC OFF
starts.)
(5) When the adjustment of AGC OFF is com-
pleted, the screen for the continuing ad-
justment is displayed.
[50 Hz(PAL) adjustment]
(6) Change the filter from ND0.3 to ND1.5,
then, adjust in the same procedure from
(2) to (5).
(7) When the adjustment is normally finished,
the information screen shows the comple-
tion of the adjustment. The color bar is dis-
played in the unit.
(No.HC044<Rev.001>)1-17