Canon Canovision8 E50E Service Manual page 67

5-12 Full auto white balance adjustment 3
White chart
Vectorscope
Halogem lamp
FAWB R+8
PRO. C.BLA.
TP2656 (CH SEL)
TP2651_ (FL TEST)
VR2654 (AWB R+B)
TP2653 (GND?
Open
* Note: Do not turn VR excessively.
Procedures:
(1) Shoot white chart with halogen lamp
lighted.
(2) Shift bright dot in direction of B-Y +.
(VR2654) i
(3) Turn VR2654 reversely to above direction
until bright dot comes to the position in
» Fig. 11-59,
BURST=40 mm
Fig, 11-59
5-13 Blooming adjustment
U-pattern chart (with white paper)
ee Iris opened
P2201 (IRIS 0/C) 1P2652 (5 V)
[M. EQ. ]Oscilloscope
TOOL NO-2.0 filter (DY9-2044-000)
Halogen lamp, White paper (thin one),
Fixture (supplement for AIE,F's Service
Manual)
TP/TRIG.|PRO. C.B.A. 1P2202 (S/H OUT?
TP2204_(FH/2)
ADJ. SENS. C.8.A. VR2101 (V SUB)
* Note: Perform this adjustment only when
the CCD is replaced.
Before the SENSOR C.B.A. is replaced,
measure the voltage at pin 14 of CCD
(V SUB) in advance.
After mounting the new C.B.A.,
adjust the VR2101 to make the pin
voltage same as that measured in
advance,
Procedures;
(1) Open the iris. (1PZ201 + TP2652)
(2) Attach the ND-2.0 filter on the front
face of lens with the fixture.
(supplement for AIE,F's Service Manual)
Prepare a U-pattern chart with a white
paper attached on its rear side.
Make setting as shown in the Fig. II-60,
Shoot the U-pattern chart with up side
down. (Standard angle of view)
Locate the halogen lamp so that the
signal level at TP2202 becomes 300 mVp-p
("A" in the figure). *
Also, adjust the angle of halogen light
so that the waveform in the Fig. II-61 is
obtained.
Remove the ND-2.0 filter and observe the
monitor TV. (Fig. 11-62)
Adjust VR2101 ta neck if the blooming is
appeared.
Adjust the signal level at 1P2202
to 1100 mVp-p ("a" in the figure)
by VR2101,
(3)
(4)
(5)
(6)
(7)
(8)
approx. 1.4m
\/ by
NO
RN
ND-2.0/Fixture
HALOGEN
LAMP
White U-pattern chart
paper
Fig. I1-60
Suppress blooming
1000 mVp-p
SPEC. TYPE I
TYPE IL
Fig. I1-61
70 mV¥/10 ys