Rgb Output Level Adjustment; Vertical Stripe Adjustment; Sub Bright Adjustment; Screen Center Adjustment - Sony KF-50SX100K 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
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 followings
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

3-5. VERTICAL STRIPE ADJUSTMENT

1. Setting
D9512 TES 2 G-LUT SW
D9512 TPN 0 T-PATN SW
D9512 TPN 1 T-SIG SEL
D9512 TPN 2 PATN DIR
D9512 TPN 3 SIG LV DIR
D9512 TPN 5 B-LV
D9512 TPN 6 G-LV
D9512 TPN 7 R-LV
2. Check the middle luminance of mono flat field on the screen.
0
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
0
1
0
1
0
15
15
15
KF-50SX100/50SX100K/50SX100U
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 3 B EVEN VR" to the
vertical stripe (brightness difference every two dots) to
minimum.
3) Write the data into memory.

3-6. SUB BRIGHT ADJUSTMENT

1. Receive the monoscope signal.
2. Mode
PICTURE Personal
SCREEN SIZE Full
3. Adjust by changing data of "D9512 IM 3 SUB BRT" so that
the border between 0 IRE and 10 IRE becomes distinct.
4. Write the data into memory.

3-7. SCREEN CENTER ADJUSTMENT

3-7-1. Horlzontal center adjustment
50Hz : PAL SPCB
60Hz : PAP (PAL SPCB for main and sub)
1) Adjust H center by changing data of "IP00C741A
1.OACTHST-L".
3-7-2. Vertical center adjustment
50Hz : PAL SPCB
60Hz : INDEX
(1) 50Hz adjustment
Input PAL SPCB and adjust V center by changing data of
"IP00C741A 3. SYRDLY".
– 43 –
RM-903 RM-903
Screen magnify
Should be minimize bright
difference every two dots.
Fig. 3-3
RM-903