Adjustment Of White Balance - JVC TK-C400E Service Manual

Measuring
No. Item instrument &
Input signals

2.9 ADJUSTMENT OF WHITE BALANCE

1 White Gray scale chart
balance
adjustment(1) Oscilloscope
(H-rate, 10:1) or
W.F.M
Auto-white balance (1)
Oscilloscope or Waveform monitor
AWBPRER
&H29
2 White Gray scale chart
balance filter
adjustment(2) (No. 80B+80B)
Oscilloscope
(H-rate, 10:1) or
W.F.M.
Measuring point (*)
Adjustment parts (-)
Mode
Adjustment level (+)
* VIDEO OUT
- LENS IRIS
+
U-ver.
E-ver.
MCRDIP = 1
MCRAE = 1
AWBCNT = &H8229
INTGR = &H4B6151
WBR AWBPREB
&H29 &H51
* VIDEO OUT
- LENS IRIS
+
U-ver.
E-ver.
1) Select the "NEXT" button to display "White
(75 ohm Termination) balance (1)" on the title bar.
2) Adjust the lens iris to obtain the specified level
of white chip at the measuring point.
3) Press either "
0.714 Vp-p (100IRE)
"AWBPRER", then "AWBCNT" and "INTGR"
0.7 Vp-p (100%)
data are appeared in the "Show Controls"
box.
4) Press the "
"AWBPRER" to be same data of AWB CNT's
data. (last 2 digit)
5) Press the " " or " " button of the "WBR"
to be the same data of AWB CNT's data. (last
2 digit)
6) Press the "
AWBPREB to be the same data of INTGR's
data. (last 2 digit)
7) Press the " " or " " button of the WBB to
be same data of INTGR's data. (last 2 digit)
WBB
&H51
1) Select the "NEXT" button to display "White
(75 ohm Termination) balance (2)" on the title bar.
2) Adjust the lens iris to obtain the specified level
of white chip at the measuring point.
3) Press the " " or " " button of the PRE2R,
then AWB CNT and INTGR data are appeared
in the Show Controls box.
4) Press the " " or " " button of the PRE2R
0.714 Vp-p (100IRE)
to be same data of AWB CNT's data. (last 2
0.7 Vp-p (100%)
digit)
5) Press the " " or " " button of the PRE2B
to be same data of INTGR's data. (last 2 digit)
Adjustment procedure
" or " " button of the
" or " " button of the
" or " " button of the
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