Circuit Adjustments; A Board Adju Stme; B Board Adjus Tmen - Sony KVX-370 Service Manual

KVX-370
4-1. A BOARD. ADJUSTMENT
A Board
RV306
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lsuB BRIGHTNESS ADJUSTMENT (RV305)
1 . Input the color bar signal .
2 . P icture ...... · .... ·M a x .
Brightness, ...... standard
3 . Connect oscilloscope to pin ® of A-2 connector .
4 . Adjust RV305 for 4 . 8 ± 0 . 05V .
I
�GND
lsuB CONTRAST ADJUSTMENT (RV306)
1. Input the color bar signal .
2 . P icture ............ M a x .
Brightness .... · .. Standard
3 . Connect oscilloscope to pin ® of A-2 connector .
4 . Adjust RV306 so that 0 IRE to 100 IRE is
2 . 0 ± 0 . lV .
0 IRE--1\7
100
!WHITE PEAK ADJUSTMENT (RV306)
1 . Input the color bar signal then turn off the
chroma signal in order to obtain B/W signal on
the screen .
2 . Bring the luminance meter into contact with the
white portion of the color bar .
3 . Adjust RV306 for 155 ± 5 NIT .
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CIRCUIT ADJUSTMENTS

- Com p onent side -
o I /\-2
RV305
©
Color ...... Standard
Hue ..... . .. Standard
�8±0.05V
Color ...... Standard
Hue ........ Standard
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IRE_J_V
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SECTION 4
4-2. B BOARD ADJUSTMENT
RV8001
OTP8006
] I I
T8001
@ RV8002
YO
TP8003
I?>.
0
@ @
RV8003
] T�004
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0 TP701
C Board
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BLANKING DC ADJUSTMENT (RV8104)
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P ic t ure ...... ·· .... M a x .
1 . Input the 100 % white signal .
2 . Connect oscilloscope to T P 701 on the C board .
3 . Adjust RV8104 so that the sync level of the
waveform is 8 . 5 ± 0 . 5V DC .
RUN IN WHITE LEVEL ADJUSTMENT
(RV8105)
1 . Input the 100 % white signal .
2 . Connect oscilloscope to T P 701 on the C board .
3 . Adjust RV8105 so that the run in level of the
waveform is 24 . 5 ± 0 . 5V DC .
-12-
- Com p onent side -
RV8005
©
B Board
RV8004
RV8107
@)RV
RV8108 8104
@
IC8002
®iJ
RV8106
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RV8105 �
- Com p onent side -
RV601
©
D2 Board
8.5± 0.5V DC
__.__ _____ GND
r-:=7)
U l t 6: � vU
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DC
-�._ _ -- GND
CT8001
DI
RV8006
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