Rgb Output Level Adjustment; Vertical Stripe Adjustment - Sony KF-50SX200 Service Manual

3-4. RGB OUTPUT LEVEL ADJUSTMENT

1. Input the colour bar signal (100% white) to AV4 and select
AV4.
2. Setting
MCP 26 Gamma
MCP 33 DPIC-Level 0
MCP 34 DC-Tran
3. Connect an oscilloscope to pin 5 (R), pin 3 (G) or pin 1 (B)
of CN702 on BB board.
4. Initialising b Feature setting
6 Pict Boost Bypass ON
5. Adjust drive; A and cutoff; B by changing data of follow-
ings as shown in the figure.
MCP 7 R-Drive
MCP 9 G-Drive
MCP 10 B-Drive
MCP 11 R-Cutoff
MCP 12 G-Cutoff
MCP 13 B-Cutoff
6. Write the data into memory.
CN702:5 (R)
CN702:3 (G)
CN702:1 (B)
Fig. 3-2
0
0
A : 1.4 ± 0.025Vp-p
B : 2.275 ± 0.025Vp-p
A : 1.4 ± 0.025Vp-p
B : 2.275 ± 0.025Vp-p
A : 1.4 ± 0.025Vp-p
B : 2.275 ± 0.025Vp-p

3-5. VERTICAL STRIPE ADJUSTMENT

1. Setting
D9512 TES 2
D9512 TPN 0
D9512 TPN 1
D9512 TPN 2
D9512 TPN 3
D9512 TPN 5
D9512 TPN 6
D9512 TPN 7
2. Check the middle luminance of mono flat field on the
screen.
3. R adjustment
1) Set "D9512 TPN 8 T-PATN RGB" to 1.
2) Adjust by changing data of "LCD-DR 3 R EVEN VR" to
the vertical stripe (brightness difference every two dots) to
minimum.
3) Write the data into memory.
4. G adjustment
1) Set "D9512 TPN 8 T-PATN RGB" to 2.
2) Adjust by changing data of "LCD-DR 8 G EVEN VR" to
the vertical stripe (brightness difference every two dots) to
minimum.
3) Write the data into memory.
3. B adjustment
1) Set "D9512 TPN 8 T-PATN RGB" to 4.
2) Adjust by changing data of "LCD-DR 13 B EVEN VR" to
the vertical stripe (brightness difference every two dots) to
minimum.
3) Write the data into memory.
– 28 –
KF-50SX200/50SX200K/50SX200U
G-LUT SW 0
T-PATN SW 1
T-SIG SEL 0
PATN DIR 1
SIG LV DIR 0
B-LV 15
G-LV 15
R-LV 15
Screen magnify
Should be minimize bright
difference every two dots.
Fig. 3-3
K
RM-905