5-18 (E)
BVP-E30/E30P M-V1
(4) Test Point : CN2- pin3/TG-229 board
(GND : E501/DPR-261)
Lens Iris :
C = 10 mV
(5) Adjustment Point
.
MENU : SERVICE
.
PAGE :
OHB TRIMMING
.
ITEM :
V-REG [R]
Write down the voltage V2 at which the D section
of the waveform just begins to change from OK to
NG.
Specifications : V-REG [R] =
V1
+
V2
2
(Calculate with hexadecimal)
2.
Perform V-REG [G] adjustment in the same manner as
step 1.
Test Point :
CN1- pin14/PA-273 board (GND : E501/DPR-261)
CN2- pin2/TG-229 board (GND : E501/DPR-261)
Specifications : V-REG [G] =
V1
+
V2
2
(Calculate with hexadecimal)
3.
Perform V-REG [B] adjustment in the same manner as
step 1.
Test Point :
CN1- pin14/PA-272 board (GND : E501/DPR-261)
CN2- pin1/TG-229 board (GND : E501/DPR-261)
Specifications : V-REG [B] =
V1
+
V2
2
(Calculate with hexadecimal)
5-9. V-REG Voltage Adjustment
n
The V-REG voltage specific to the CCD has been adjusted
for the optimum value at factory.
Therefore, never change this voltage from the factory
setting value.
Only when the improper data was saved by OHB TRIM-
MING page of the SERVICE menu by mistake, perform
this adjustment.
Equipment : Oscilloscope
Preparations
.
Extend the CCD block. (Refer to Section 1-14-3.)
.
Shoot the fully occupied white area of the pattern box in
the full underscanned monitor frame adjusting the zoom
control.
Adjustment Procedures
1.
V-REG [R] adjustment
(1) Test Point : IC1- pin14/PA-274 board
(GND : E501/DPR-261)
Lens Iris :
A = 500
±
50 mV
(2) Select a large lens aperture (3 stops and a half) to
obtain the 10 times amount of light.
(3) Adjustment Point
.
MENU : SERVICE
.
PAGE :
OHB TRIMMING
.
ITEM :
V-REG [R]
Write down the voltage V1 at which the B section
of the waveform just begins to change.
A
(Oscilloscope)
H rate
V1
B
H rate
(Oscilloscope)
H rate
(Oscilloscope)
V2
OK
NG
Blanking
Video
D
C
H rate
(Oscilloscope)