JVC AV28BH7ENS Service Manual page 20

■ ■ ■ ■ VIDEO CIRCUIT
Measuring
Item
instrument
WHITE Signal
BALANCE gener ator
adjustment
Remote
control unit
COLOUR Signal
CUTOFF gener ator
LEVEL
adjustment Remote
control unit
PAL Signal
Y DELAY gener ator
adjustment
Remote
control unit
SECAM Signal
Y DELAY gener ator
adjustment
Remote
control unit
NT SC Signal
Y DELAY gener ator
adjustment
Remote
control unit
Test point Ad justment part
WdR
WdG
WdB
CuR
CuG
CuB
YDP
YDS
YDN
No. 51967
Description
1. Receive a black & white signal.
2. Select WdR, WdG and WdB with the UP/DOWN ( / ) key.
3. Adjust WdR, WdG and WdB with the LEFT/RIGHT ( / )
key .
4. Press the MENU key and memoriz e the s et value.
1. Receive a cross-hatch signal.
2. Select CuR, CuG and CuB with the UP/DOWN ( / ) key.
3. Adjust CuR, CuG and CuB with the LEFT/RIGHT ( / ) key
and s et the values of these items as 64 (constant).
4. Press the MENU key and memoriz e the s et value.
1. Receive a PAL COLOUR BAR.
2. Select YDP with the UP/DOWN ( / ) key.
3. Adjust YDP by pressing with the LEFT/RIGHT ( / ) key till
the c olour transients on the colour bar pattern becomes as
sharper and possible as colours between transients do not
mix with each other.
4. Press the MENU key and memoriz e the s et value.
1. Receive a SECAM COLOUR BAR test pattern.
2. Select YDS with the UP/DOWN ( / ) key.
3. Adjust YDS by pressing with the LEFT/RIGHT ( / ) key till
the colour transients on the colour bar pattern bec omes as
sharper and possible as colours between transients do not
mix with each other.
4. Press the MENU key and memoriz e the s et value.
5.
1. Receive a NTSC COLOUR BAR test pattern from an external
sourc e (e.g. EXT 1).
2. Select YDN with the UP/DOWN ( / ) key.
3. Adjust YDN by pressing with the LEFT/RIGHT ( / ) key till
the colour transients on the colour bar pattern bec omes as
sharper and possible as colours between transients do not
mix with each other.
4. Press the MENU key and memoriz e the s et value.
AV28BH7ENS / AV28BH7ENB
AV28BH7EPS / AV28BH7EPB
AV28BH7EES / AV28BH7EEB
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