Picture Quality Adjustments; Deflection Adjustments - Sony TRINITRON KV-AR25M81A Service Manual

3-3. PICTURE QUALITY ADJUSTMENTS

SUB COLOR ADJUSTMENT SCL
1. Select Video.
2. Input PAL Color Bar.
3. Set to following condition PICTURE 100%, BRIGHTNESS
50%, Color 50%.
4. Connect an oscilloscope to pin 1 (BOUT) of CN305, A Board.
5. Set the service mode and select SAJ 3 'SCL' with 1 and 4 of
the commander then adjust the VB2=VB3=VB4 3 and 6.
6. Add 6 steps and save the data.
7. Input NTSC Color Bar.
8. Repeat item 4 to 6.
9. Select "WIDE" mode, write the "SAME DATA- 3 STEPS" for
both PAL and NTSC Color Bar input.
VB1
VB2
VB2 = VB3 = VB4
VB2 = VB3 = VB4 (FOR PAL SUB COLOR ADJUSTMENT)
(Difference is within 70mV)
SUB HUE ADJUSTMENT (SHU)
1. Select Video.
2. Input NTSC3.58 Color Bar
3. Set to following condition PICTURE 100%, BRIGHTNESS
50%, Color 50%.
4. Connect an oscilloscope to pin 1 (BOUT) of CN305, A Board.
5. Set the service mode and select SAJ 01 'SHU' with 1 and 4
of the commander then adjust the VB1=VB2=VB3=VB4 3
and 6.
¡ - of the commander to write the data.
[MUTING]
6. Press
7. Adjust SAJ 01 "SHU" as step 2 to 5 when receiving TV mode.
VB1
VB2
VB1 = VB2 = VB3 = VB4
The highest level of VB1,VB2,VB3,VB4 must be aligned at the
same line. Ideal difference level between VB2 and VB3 should be
within ± 110mV.
VB4
VB3
VB3 VB4
≤ 110mV

3-4. DEFLECTION ADJUSTMENTS

NORMAL MODE (50Hz)
1. Set to Service Mode.
2. Using the 1 and 4 buttons select category GEO (Service
Mode).
3. Select and adjust the following items to obtain obtimum image.
Raise/lower the data with the 3 and 6 buttons.
Service Item
GEO : 00 HPS
01 HSZ
02 PAP
03 TLT
04 VPS
05 VSZ
06 SCO
07 VLN
08 BOW AFC BOW
09 AGL
0A UPN
0B LPN
WIDE MODE (50Hz)
4. Input a PAL color-bar.
5. Adjust condition change to WIDE MODE : ON.
Using the 1 and 4 button, select category GEO
6.
(Service Mode).
7. Copy (item from normal mode (50Hz)) adjusted data for
the following item:
Service Item
GEO : 01 HSZ
05 VSZ
06 SCO
07 VLN
Raise/lower data using 3 and 6 buttons, select and
8.
adjust the following items to obtain optimum image.
Service Item
GEO : 00 HPS
02 PAP
03 TLT
04 VPS
08 BOW AFC BOW
09 AGL
0A UPN
0B LPN
9. After confirm WIDE MODE : ON – OFF.
10. Repeat same steps for NTSC input signal.
– 21 –
KV-AR25M81A
H POSITION
H SIZE
PIN AMP
TILT
V POSITION
V SIZE
S CORRECTION
V LINEARITY
AFC ANGLE
UPPER CORNER PIN
LOWER CORNER PIN
H POSITION
V POSITION
S CORRECTION
V LINEARITY
H POSITION
PIN AMP
TILT
V POSITION
AFC ANGLE
UPPER CORNER PIN
LOWER CORNER PIN
RM-952