Picture Quality Adjustment - Sony KV-SW34M61 Service Manual

KV-SW34M61
RM-W103

3-3. PICTURE QUALITY ADJUSTMENT

SUB COLOR ADJUSTMENT
1. Select Video.
2. Input PAL 100% Color Bar.
3. Set to following condition:
PICTURE 100%,COLOR 50%, BRIGHTNESS 50%,
HUE Center, SHP 50%.
4. Set the PICT 006 WTS to 00h.
5. Connect an oscilloscope to pin 2 (B OUTPUT) of
CN004 A Board.
6. Set the service mode and select SADJ 004 "SCOL"
with and of the commander then adjust to
1 4
VB2=VB3=VB4 with
data as below :
Adjust SCOL VALUE=X
VIDEO MODE
SIZE
PAL SECAM
25 X+2 X+2
29 X+3 X+3
34 X+4 X+6
7. Input NTSC 75% Color Bar to TV set and repeat item no.
3 to 5.
8. Set the service mode and select SADJ 004 "SCOL"
with and of the commander then adjust to
1 4
VB1 = VB4. Write the data as below :
Adjust SCOL VALUE=Y
VIDEO MODE
SIZE
NTSC
25 Y+5
29 Y+4
34 Y+6
9. Set WTS back to original data.
VB1
VB2 = VB3 = VB4(For PAL sub color adjustment)
VB1 = VB4(For NTSC sub color adjustment)
(Difference is within 70mV)
SUB HUE ADJUSTMENT
1. Select Video.
2. Input NTSC 3.58 Color Bar to TV set.
3. Set to following condition:
PICTURE 100%,COLOR 50%, BRIGHTNESS 50%,
HUE Center, SHP 50%.
4. Connect an oscilloscope to pin 2 (B output) of CN004.
5. Set the service mode and select SADJ 001 "SHUE"
with and of the commander then adjust to
1 4
VB1=VB2=VB3=VB4 with
6. Then press [MUTING] t
7. Select TV channel with NTSC 3.58 and repeat item no.
3 to 6.
8. For single system models with NTSC 4.43, select TV
channel with NTSC 4.43 and repeat no. 3 to 6.
and (For PAL), write the
3 6
RF MODE DVD MODE
PAL SECAM 50Hz
X+2 X+2 X+6
X+3 X+3 X+7
X+6 X+6 X+8
RF MODE DVD MODE
NTSC 60Hz
Y+5 Y+7
Y+4 Y+6
Y+6 Y+8
VB4
VB2 VB3
and .
3 6
to write the data.
-
VB1
VB1 = VB2 = VB3 = VB4
The highest level of VB1, VB2, VB3, VB4 must be
aligned at the same time.
The ideal difference between VB2 and VB3 is within ±
80mV.
Sub Hue Adjustment For YUV input
1. Select YUV input.
2. Input NTSC 3.58 Color Bar Into YUV mode.
3. Connect an oscilloscope to pin 1 (B output) of CN004.
Set the service mode and select YC 013 "TINT" with
and of the commander then adjust to
1 4
VB1=VB2=VB3=VB4 with
5. Then press [MUTING] t
VB1
VB1 = VB2 = VB3 = VB4
The highest level of VB1, VB2, VB3, VB4 must be
aligned at the same time.
The ideal difference between VB2 and VB3 is within ± 80mV.
PMAX/CONTRAST ADJUSTMENT
Picture Mode: Personal
1. Select Video mode.
2. i)Input PAL Color Bar toTV set. (Other)
ii)Input NTSC 75% Color Bar (NTSC model).
3. Set the following condition:
PICTURE 100%, COLOR 0%,BRIGHTNESS 50%
4. Connect oscilloscope to pin 4 (R Output) of CN004,
5. Set to Service Mode PWL PICT 003 to 00h and
WHBL 017 BLBG to 01h.
6. Select SADJ 000 "PMAX" with
commander then adjust VR within spec with
VR
– 30 –
VB3 VB4
80mV
VB2
and .
3 6
to write the data.
-
VB3 VB4
80mV
VB2
and of the
1 4
3
VR
Black
PAL
2.15±
34"
0.03Vpp
2.15±
32"
0.03Vpp
2.15±
29"
0.03Vpp
2.15±
28"
0.03Vpp
2.15±
25"
0.03Vpp
and .
6