JVC TK-1280E - Page 48

TK-1280E/-180E/-1281EG |
fo. | tem | instrument iss pont
@ IRIS : CLOSED
23 | CCD -IRIS
offset
adjustment
IRS LEVEL
SUB - VR
adjustment
GALVANO-
METRIC AE
LENS DRIVE
CIRCUIT
adjustment
22 (No. 6647)
Oscilloscope,
Waveform
monitor or
Oscilloscope,
Gray scale
Oscilloscope,
White pattern,
Galvanometric
AE lens
TP —~ 301 (CCD } R310 (CCD IRIS)
IRIS) (FEATURE board)
{FEATURE
board]
VIDEO OUT R22 (IRIS LEVEL)
{CDS/TG board]
VIDEO OUT or
TP-4
(CDS/TG
board]
R116 (ALC)
R113 (GAIN)
(FEATURE board]
Ais
2.
. Set the SHUTTER mode SW to
Connect an oscilloscope to TP — 301 (CCD
IRIS). (5ms/div, 0.2V/div DC)
Use R310 (CCD IRIS) to adjust the TP —-
301 (CCD IRIS) so that it may become flat.
. Connect a waveform monitor or oscilloscope
to the video output.
. Shoot the gray scale cross point at 70 to
100 IRE/100 %.
“CCD -
IRIS” position.
. Adjust the gray scale to 100 IRE/100 % with R22
(IRIS LEVEL).
(NTSC : 714mV, PAL : 70O0mV)
. Fit a galavanometric AE lens.
. Turn ON the BLC switch.
. Connect a waveform monitor or oscilloscope
to the video output.
. Connect the oscilloscope to the auto iris terminal
output. (V — rate 200 mV/div.)
. Set R116 (ALC) to the center.
. Meke the auto iris terminal output level flat
with R113 (GAIN). (Match the video level
with the masking pulse level.)
Masking S Match the video levels.
pulse
‘a