Sony KV-XA21M93, Service Manual

Page: 33 / 65

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KV-XA21M93
RM-952
4-3. 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]
→
-
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.
SUB HUE ADJUSTMENT
1. Select Video 1.
2. Input a NTSC 3.58 color-bar, video into Video 1.
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 O1 "SHU" with
1
and
4
of the commander by
setting to Service Mode and adjust to VB1=VB2=VB3=VB4
with
3
and
6
.
4-4. 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 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
VB1 VB2 VB3 VB4
VB1 = VB2 = VB3 = VB4
VB1 VB2 VB3 VB4
VB2 = VB3 = VB4
6. Press
[MUTING]
→
-
of the commander to write the data.
7. Adjust SAJ O1 "SHU" as step 3 to 6 when receiving TV mode.
NORMAL MODE (60Hz)
11. Input 525/60Hz signal.
12. Using the
1
and
4
buttons select category GEO (Service
Mode).
13. 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
Note:
For Deflection Adjustment, set PICTURE MODE to "SOFT".
4-5. A BOARD ADJUSTMENT AFTER IC003
(MEMORY) REPLACEMENT
1. Enter to Service Mode.
2. Press commander buttons
5
and
-
(Data Initialize), and
2
and
-
(Data Copy) to initialize the data.
3. Call each item number and check if the respective screen
shows the normal picture.
In cases where items are not well adjusted, rectify the fine
adjustment.
Write the data per each item number (
[MUTING]
+
-
).
4. Select item numbers “OPB00” (OP1), “OPB01” (OP2), "OPB
02" (OP3) and "OPB 03" (OP4) respectively set the bit per
model with command buttons
3
and
6
.
5. Press commander buttons
8
and
-
(Test Normal) to return
to the data that was set on the shipment from the factory.
(This will also cancel Service Mode.)