Read Sony KV-AR25M81A Service Manual online
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KV-AR25M81A
RM-952
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
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
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
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.
SUB HUE ADJUSTMENT (SHU)
1. Select Video.
2. Input NTSC3.58 Color Bar
3. Set to following condition PICTURE 100%, BRIGHTNESS
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
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.
and 6.
6. Press
[MUTING]
→ - of the commander to write the data.
7. Adjust SAJ 01 "SHU" as step 2 to 5 when receiving TV mode.
VB1
VB2
VB3
VB4
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
same line. Ideal difference level between VB2 and VB3 should be
within
± 110mV.
VB1
VB2
VB3
VB4
VB2 = VB3 = VB4
VB2 = VB3 = VB4 (FOR PAL SUB COLOR ADJUSTMENT)
(Difference is within 70mV)
(Difference is within 70mV)
3-4. DEFLECTION ADJUSTMENTS
NORMAL MODE (50Hz)
1. Set to Service Mode.
2. Using the 1 and 4 buttons select category GEO (Service
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
H POSITION
01
HSZ
H SIZE
02
PAP
PIN AMP
03
TLT
TILT
04
VPS
V POSITION
05
VSZ
V SIZE
06
SCO
S CORRECTION
07
VLN
V LINEARITY
08
BOW AFC BOW
09
AGL
AFC ANGLE
0A
UPN
UPPER CORNER PIN
0B
LPN
LOWER CORNER PIN
WIDE MODE (50Hz)
4.
Input a PAL color-bar.
5.
Adjust condition change to WIDE MODE : ON.
6.
Using the 1 and 4 button, select category GEO
(Service Mode).
(Service Mode).
7.
Copy (item from normal mode (50Hz)) adjusted data for
the following item:
Service Item
the following item:
Service Item
GEO : 01
HSZ
H POSITION
05
VSZ
V POSITION
06
SCO
S CORRECTION
07
VLN
V LINEARITY
8.
Raise/lower data using 3 and 6 buttons, select and
adjust the following items to obtain optimum image.
adjust the following items to obtain optimum image.
Service Item
GEO : 00
HPS
H POSITION
02
PAP
PIN AMP
03
TLT
TILT
04
VPS
V POSITION
08
BOW AFC BOW
09
AGL
AFC ANGLE
0A
UPN
UPPER CORNER PIN
0B
LPN
LOWER CORNER PIN
9.
After confirm WIDE MODE : ON – OFF.
10.
Repeat same steps for NTSC input signal.
≤ 110mV
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