5-6
L3820EA
9. At this time, Re-check that Horizontal line is white.
If not, Re-adjust Cut-off Adjustment until the
Horizontal Line becomes pure white.
10. Turn off and on again to return to normal mode.
Receive APL 100% white signal and Check
Chroma temperatures become 9200K (x: 286 / y:
294)±3%.
Note:
Confirm that Cut Off Adj. is correct after this
adjustment, and attempt Cut Off Adj. if
needed.
13. U-Offset
1. In VIDEO mode (white 50%) of V1 or V2, press [3]
button on the service remote control unit and
select “U-Offset” mode. (Display change “U-
Offset”, “V-Offset”, “U-Offset YUV” and “V-Offset
YUV” cyclically when [3] button pressed.)
2. Press [VOL
o
/
p
] button on the service remote
control unit and select “U-Offset (Cyan)” mode.
3. Check the waveform of the base of Q1531 on the
CRT CBA with the oscilloscope.
4. Press [VOL
o
/
p
] button on the service remote
control unit and select “U-Offset (Magenta)” mode.
5. Press [CH
o
/
p
] buttons so that the waveform of
the “U-Offset (Magenta)” mode is equal to the
waveform of the “U-Offset (Cyan)” mode.
14. V-Offset
1. In VIDEO mode (white 50%) of V1 or V2, press [3]
button on the service remote control unit and
select “V-Offset” mode. (Display change “U-
Offset”, “V-Offset”, “U-Offset YUV” and “V-Offset
YUV” cyclically when [3] button pressed.)
2. Press [VOL
o
/
p
] button on the service remote
control unit and select “V-Offset (Cyan)” mode.
3. Check the waveform of the base of Q1511 on the
CRT CBA with the oscilloscope.
4. Press [VOL
o
/
p
] button on the service remote
control unit and select “V-Offset (Magenta)” mode.
5. Press [CH
o
/
p
] buttons so that the waveform of
the “V-Offset (Magenta)” mode is equal to the
waveform of the “V-Offset (Cyan)” mode.
15. U-Offset YUV
1. In VIDEO mode (white 50%) of YUV, press [3]
button on the service remote control unit and
select “U-Offset YUV” mode. (Display change “U-
Offset”, “V-Offset”, “U-Offset YUV” and “V-Offset
YUV” cyclically when [3] button pressed.)
2. Press [VOL
o
/
p
] button on the service remote
control unit and select “U-Offset YUV (Cyan)”
mode.
3. Check the waveform of the base of Q1531 on the
CRT CBA with the oscilloscope.
4. Press [VOL
o
/
p
] button on the service remote
control unit and select “U-Offset YUV (Magenta)”
mode.
5. Press [CH
o
/
p
] buttons so that the waveform of
the “U-Offset YUV (Magenta)” mode is equal to
the waveform of the “U-Offset YUV (Cyan)” mode.
16. V-Offset YUV
1. In VIDEO mode (white 50%) of YUV, press [3]
button on the service remote control unit and
select “V-Offset YUV” mode. (Display change “U-
Offset”, “V-Offset”, “U-Offset YUV” and “V-Offset
YUV” cyclically when [3] button pressed.)
2. Press [VOL
o
/
p
] button on the service remote
control unit and select “V-Offset YUV (Cyan)”
mode.
3. Check the waveform of the base of Q1511 on the
CRT CBA with the oscilloscope.
4. Press [VOL
o
/
p
] button on the service remote
control unit and select “V-Offset YUV (Magenta)”
mode.
5. Press [CH
o
/
p
] buttons so that the waveform of
the “V-Offset YUV (Magenta)” mode is equal to the
waveform of the “V-Offset YUV (Cyan)” mode.
