Rpn Compensation Adjustment - Sony BVP-E30 Maintenance Manual

5-6. RPN Compensation Adjustment

RPN (Residual Point Noise) on CCD is automatically
corrected during ABB (Auto Black Balance adjustment)
operation. However some RPN, low level white dots on
dark background, black dots and bright dots may remain.
Perform this adjustment to correct those low level white
dots on dark background.
n
Perform Section 5-5. "RPN Pixel Concealment" to correct
black dots and bright dots.
<COMPENSATION>
COMPENSATION MODE: OFF
CHANNEL SELECT
TEST CHARACTER
CURSOR: OFF
EXEC
LEVEL : --
SELECT: --
SAVE CANCEL
AUTO COMPENSATION
Notes
. The temperature inside of the unit is not stable just after
turning on the power, and the compensation may not be
carried out correctly.
Wait for about 20 minute after turning the power on, and
then start this adjustment.
. When the low level white dots cannot be compensated
even if the auto compensation is finished, perform the
manual compensation.
Equipment : B/W monitor or color monitor
Test Point : TEST OUT connector
Preparations
. Adjust the black balance automatically.
(Refer to Section 5-2-1.)
. Menu setting
MENU : SERVICE
PAGE : COMPENSATION
COMPENSATION MODE → ON
ITEM :
. When the RPN recognition is difficult since the RPN
hides behind the character on a screen on is very close to
the character :
ITEM : TEST CHARACTER → OFF
Adjustment Procedures
Auto Compensation
1. Move the cursor → to "AUTO COMPENSATION",
and press the MENU SELECT knob.
"APR EXCUTING" will be displayed, and the com-
pensation will be performed.
BVP-E30/E30P M-V1
: R
: OFF
H: 170
V: ev194
2. When the compensation is finished, "APR OK" will be
displayed.
3. Repeat steps 1 and 2 two times.
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The number of the RPNs compensated at once is limited.
When all RPNs do not disappear even if "APR OK" is
displayed, carry out the automatic compensation again or
the manual compensation.
Manual Compensation
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Be sure not to move the cross cursor until the SAVE or
CANCEL operation is completely finished.
1. Select the channel to be compensated.
ITEM : CHANNEL SELECT → R, G, B
2. Adjust the values of H and V so that the center of the
cross cursor is aligned just over the RPN.
ITEM : CURSOR → ON
ITEM : H, V
3. Move the cursor → to "EXEC", and press the MENU
SELECT knob. "EXEC OK" will be displayed.
Press MENU SELECT knob again, the compensation
of the maximum level will be performed.
n
You cannot make a compensation for the pixels in the
upper/lower one line and right/left 13 horizontal pixels
toward the already-compensated pixels.
When you try to compensate those pixels, the follow-
ing two selections at "SELECT" item on the screen
will be displayed.
Select either and perform adjustment.
ADJASENT PIXEL : the existing data takes effect
SETTING PIXEL :
4. If the RPN remains as a black dot (overcompensated)
or a white dot (incompletely-compensated), make a
fine adjustment.
ITEM : LEVEL → 99 to 0
5. When the RPN is compensated, move the cursor → to
"SAVE". Then, press MENU SELECT knob.
6. If the RPN cannot be compensated or an incorrect
operation was executed by mistake, move the cursor
→ to "CANCEL". Then, press MENU SELECT knob.
7. If perform this adjustment again or any other RPNs
remain, repeat steps 2 to 5.
Setting after Adjustment
ITEM : COMPENSATION MODE → OFF
the existing data is deleted
5-15 (E)