Picture Quality Adjustments; Deflection Adjustment - Sony KV-XA25M80 Service Manual

5-3. PICTURE QUALITY ADJUSTMENTS

SUB COLOR ADJUSTMENT
1. Select Video.
2. Input a PAL color-bar.
3. Set to the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
4. Connect an oscilloscope to pin 1 (B OUT) of CN305,
A board.
5. Set to Service Mode and select SAJ 'SCL' with [1] and [4]
of the commander then adjust to VB2=VB3=VB4 with [3]
and [6].
6. Press [MUTING] ¡ [0] of the commander to write the data.
7. Adjust SAJ 'SCL' as step 3 to 5 when receiving NTSC
color-bar.
8. Select the 'Wide' mode, write the 'same data-3 steps' for
both PAL and NTSC input.
VB1
VB2
VB2 = VB3 = VB4
SUB HUE ADJUSTMENT
1. Select Video 1.
2. Input a NTSC 3.58 color-bar, into Video.
3. Set the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
4. Connect an oscilloscope to pin 1 (B OUT) of CN305,
A board.
5. Select SAJ 1 "SHU" with [1] and [4] of the commander by
setting to Service Mode and adjust to
VB1=VB2=VB3=VB4 with [3] and [6].
VB1
VB3
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.
6. Press [MUTING] ¡ [0] of the commander to write the data.
7. Adjust SAJ 1 "SHU" as step 3 to 6 when receiving TV
mode.
VB4
VB3
VB4

5-4. DEFLECTION ADJUSTMENT

NORMAL MODE (50Hz)
1. Set to Service Mode.
2. Using the [1] and [4] button, select category GEO (Service
Mode).
3. Raise/lower the data using the [3] and [6] buttons.
Select and adjust the following items to obtain optimum
image.
Service Item
GEO : 00
01
02
03
04
05
06
07
08
09
0A
0B
WIDE MODE (50Hz)
4. Input PAL color bar.
5. Adjust condition change to WIDE MODE : ON.
6. Using the [1] and [3] button, select category GEO (Service
Mode).
7. Copy (item from normal mode (50Hz)) adjusted data for
the following item:
Service Item
GEO : 01
05
06
07
8. Raise/lower data using [3] and [6] buttons, select and
adjust the following items to obtain optimum image.
Service Item
GEO : 00
02
03
04
08
09
0A
0B
9. After confirm WIDE MODE : ON – OFF.
10. Repeat same steps for NTSC input signal.
– 55 –
KV-XA25M80/XA25M83/XA25N90
RM-954
HPS H POSITION
HSZ H SIZE
PAP PIN AMP
TLT TILT
VPS V POSITION
VSZ V SIZE
SCO S CORRECTION
VLN V LINEARITY
BOW AFC BOW
AGL AFC ANGLE
UPN UPPER CORNER PIN
LPN LOWER CORNER PIN
HSZ H POSITION
VSZ V POSITION
SCO S CORRECTION
VLN V LINEARITY
HPS H POSITION
PAP PIN AMP
TLT TILT
VPS V POSITION
BOW AFC BOW
AGL AFC ANGLE
UPN UPPER CORNER PIN
LPN LOWER CORNER PIN
RM-914