Sharp 21V-FS700S Service Manual page 22

21V-FS700S
5. NTSC CHROMA ADJUSTMENT
NO ADJUSTMENT POINT
SUB COLOUR
1
(I2C BUS CONTROL)
6. NTSC CHROMA ADJUSTMENT
NO ADJUSTMENT POINT
1 SUB-TINT
(I2C BUS CONTROL)
(to be done after
sub colour adj)
ADJUSTMENT CONDITION / PROCEDURE
1. Receive the "NTSC Split Color Bar" signal .
2. Make the image normal with the remote
controller.
3. Connect the oscilloscope to TP47R (R863)
RED-OUT.
Range : 500mV/Div (AC)
(Use Probe 10:1)
Sweep time : 10µsec/Div
4. Set the sub color adjustment mode with the
remote controller, and vary the sub color data
to make 100% W of the color bar and RED
at the same level for adjustment shown in
Fig. 1-1.
**Remark: Please make sure use RF
Signal during sub color adjustment.
ADJUSTMENT CONDITION / PROCEDURE
(1) Receive the "NTSC 3.58 Colour Bar" signal
through AV IN from IWATSU SX1006 pattern
generator.
(2) Connect the oscilloscope to TP47B (R865)
BLUE-OUT
Range : 500mV/Div (AC)
(Use Probe 10:1)
Sweep time : 10µsec/Div
(3) Select the "SUB-TINT" item in the
ADJUSTMENT MODE.. Adjust the "SUB-
TINT" data to obtain the waveform shown
as Figure 1.2 (W and Mg same level)
**Remark: Please make sure use RF
Signal during sub color adjustment.
3 – 19
WAVEFORM OR OTHERS
100% WHITE
Cy G
W Y Mg
Fig 1-1
WAVEFORM OR OTHERS
Same Level
W Y Cy G Mg R
Fig 1-2
R
B
B