Display Position Adjustment; Deflection Adjustment - Sony KV-AR25M86 Service Manual

SUB COLOR (YCJ) ADJUSTMENT
1. Select Video.
2. Input PAL Color Bar to TV set.
3. Set the following condition:
Pic: 100%, Col: 50%, Brightness: 50%, DTE: OFF
4. Connect an oscilloscope to pin 2 (B output) of CN305, A
Board.
5. Set to Service Mode and SAJ 03 'SCL' with 1 and 4 of the
commander then adjust to VB2 = VB3 = VB4 = with 3 and
6.
¡ - to write the data.
[MUTING]
6. Then press
7. Add offset steps and save the data.
Offset: 25... 0*
29... 0* + 3 steps
34... 0* + 6 steps
8. Input NTSC color bar to TV set and repeat item no 3 to 7.
10. Select "WIDE" mode, write the "SAME DATA - 3 STEPS" for
both PAL and NTSC input.
VB1
VB2
VB2 = VB3 = VB4
VB2 = VB3 = VB4 (FOR PAL SUB COLOR ADJUSTMENT)
(Difference is within 70mV)
VB1 = VB4 (FOR NTSC SUB COLOR ADJUSTMENT)
Caution : Offset steps of Sub color data should be added only
after SUB HUE adjustment is completed.
SUB HUE ADJUSTMENT
1. Select Video.
2. Input NTSC 3.58 Color Bar to TV Set.
3. Set the following condition:
Pic: 100%, Col: 50%, Brightness: 50%, DTE: OFF
4. Connect an oscilloscope to pin 1 (B output) of CN305, A
Board.
5. Set to Service Mode and YCT 00 'SHU' with 1 and 4 of the
commander then adjust to VB1 = VB2 = VB3 = VB4 = with 3
and 6.
¡ - to write the data.
[MUTING]
6. Then press
7. Select RF.
8. Input NTSC 3.58 and repeat item no 3 and 6.
VB1
VB3
VB2
VB1 = VB2 = VB3 = VB4
The highest level of VB1, VB2, VB3, VB4 must be
aligned at the same time.
Ideal difference level between VB2 and VB3 should
be within ± 110 mVpp.
0* : Adjusted data
VB3 VB4
VB4
110mV
PMX ADJUSTMENT
1. Select Video (Wide mode: OFF).
2. Input PAL Color Bar to TV set.
3. Set the following condition:
Pic: 100%, Col: 50%, Brightness: 50%, DTE: OFF
4. Connect an oscilloscope to pin 3 (R output) of CN305, A
Board.
5. Set to Service Mode and SAJ 00 'PMX' with 1 and 4 of the
commander then adjust to VR within spec with 3 and 6.
[MUTING]
6. Then press
7. Select "Wide" mode, write the "SAME DATA- 5 STEPS".
VR = 2.40 Vpp (for 34") (Difference is within 50 mVpp)
2.30 Vpp (for 29")
2.21 Vpp (for 25")
VP 06 RLM : 03H
17 R ON : 01H
18 G ON : 00H
19 B ON : 00H
After adjustment, these adjustment parameters must be recovered
to the original condition.

4-5. DISPLAY POSITION ADJUSTMENT

PIP POSITION
1. Input a PAL color-bar.
2. Press PIP button of the remote commander to set the PIP
picture.
3. Set to Service Mode.
4. Use 1 and 4 of the remote commander to select PIP 03 "HPS"
and use 3 and 6 to set data "15".
5. Select PIP 04 "VPS" to set data "2E".
¡ - of the remote commander to write the
[MUTING]
6. Press
data.
7. Use the screen display menu changing the PIP position to check
the PIP position.

4-6. DEFLECTION ADJUSTMENT

NORMAL MODE (50Hz)
1. Set Video Mode.
Using the 1 and 4 button, select category GEO
2.
(Service Mode).
Raise/lower the data using the 3 and 6 buttons.
3.
Select and adjust the following items to obtain optimum
image.
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
– 29 –
KV-AR25M86
¡ - to write the data.
VR
H POSITION
H SIZE
PIN AMP
TILT
V POSITION
V SIZE
S CORRECTION
V LINEARITY
AFC ANGLE
UPPER CORNER PIN
LOWER CORNER PIN
RM-993