JVC TM-A210G/C Service Manual page 28

Measuring
Item
instrument
SUB BRIGHT Signal
generator
Item
<S01> BRIGHT
SUB Signal
CONTRAST generator
Oscilloscope
75% WHITE W
Item
<S02> CONTRAST
1-28 (No.52119)
Test point Adjustment part
[SIGNAL BLOCK]
S01 (BRIGHT)
Initial setting value
090
TP-47G [SIGNAL BLOCK]
TP-E S02 (CONTRAST)
[CRT SOCKET
PWB]
Mg R B BL
V =42V
75-BL
Y Cy G
Initial setting value
160
• Under the condition that Low light adjustment has been
correctly finished.
(1) Input the black and white signal (included 0% black).
(2) Select the SIGNAL BLOCK with [CHROMA/PHASE]
button (< SIG >) from < BLOCK SELECT >
SERVICE MENU screen.
(3) Select < S01 >.
(4) Adjust the < S01 > to where the 0% black part
component faintly brightens.
(5) Check the BRIGHT adjustment by alternately turning
the screen display in WHITE BALANCE BLOCK
CUTOFF mode.
(1) Input the full colour bar signal (included 75% white
signal).
(2) Connect the oscilloscope to TP-47G and TP-E.
(3) Select the SIGNAL BLOCK with [CHROMA/PHASE]
button (< SIG >) from < BLOCK SELECT >
SERVICE MENU screen.
(4) Select the < S02 >.
(5) Adjust the < S02 > to become the voltage different
between 75% white and 0% black to 42V±2V as
shown in figure.
2V
Description