Sony KV-XG25M50 Service Manual ▷ View online
– 33 –
KV-XG25M50
RM-952
Item
KV-XG25M50
M
1
D/K
1
I
1
B/G
1
2nd. Lang
1
SECAM
1
XTAL 3.58
1
XTAL 4.43
1
Item
KV-XG25M50
0
1
DVD Input
0
Dis Fav.
0
Thai Bil
0
HDEV
1
NICAM
1
TOP
0
Item
KV-XG25M50
Color SW
*2&*1
1
11 KEY
0
AV Mono
*1
0
US ST
0
Auto TV sys
1
Auto PIC
1
2199 Curve
*1
0
PIC Rotate
*1
1
AV Input
OPTION NOTE
AV Input
00 = no AV Input
01 = 1 AV Input
10 = 2 AV Input
11 = 3 AV Input
DVD Input
Effective only when "AV Input" is set to 3 AV Input
Dis Fav.
Disable Favorite Channel (Only Effective For 21" & 14" Models Only)
PIC Rotate
*1
PIC Rotation Switch
0 = disabled,
1 = enabled
2199 Curve
*1
2199 volume Curve Selection
0 = Others,
1 = 2199 Volume Curve.
Auto PIC
Auto Picture Improvement
0 = inactive
1 = activate
A-TVsys
Auto TV System in Auto Program
0 = disabled,
1 = enabled
US ST
USA Stereo
0 = disabled,
1 = enabled
AV MONO
*1
AV Mono models
0 = Stereo,
1 = Mono
(No Balance & Surround selection)
11 Key
Front Key Selection
0 = 7 key model, 1 = 11 key model
Color SW
*2&*1
Color Data Selection in Dynamic Mode
0 = 65 (No PIP), 1 = 57 (PIP)
Note:
*1 - For XA-21/XG25 Models Only
*2 - For XA-34/29/25 Models Only
*2 - For XA-34/29/25 Models Only
Item
KV-XG25M50
(unused)
0
AP_XG
*1
1
(unused)
0
(unused)
0
(unused)
0
(unused)
0
(unused)
0
(unused)
0
AP_XG
*1
To select the XG AP (board B6) 0: No; 1 = Yes
Note:
*1 - For XA-21/XG25 Models Only
NOTE:
When Bit 7,6& 5 = 000, Only PAL color system is selected.
When Bit 7 is selected, Auto, PAL & NTSC 4.43 Color system is enable.
When Option is single color system, Color system cannot be changed & "AUTO" will not be
displayed.
When Bit 7 is selected, Auto, PAL & NTSC 4.43 Color system is enable.
When Option is single color system, Color system cannot be changed & "AUTO" will not be
displayed.
– 34 –
KV-XG25M50
RM-952
SUB HUE ADJUSTMENT
1. Select Video 3.58.
2. Input a NTSC, color-bar, video 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 set-
ting to Service Mode and adjust to VB1=VB2=VB3=VB4 with
3 and 6.
3 and 6.
4-3. PICTURE QUALITY ADJUSTMENTS
SUB COLOR ADJUSTMENT
1. Input a PAL color-bar.
2. Set to the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
3. Connect an oscilloscope to pin 1 (B OUT) of CN305, A board.
4. Set to Service Mode and select SAJ 3 ‘SCL’ with 1 and 4 of
the commander then adjust to VB2=VB3=VB4 with 3 and
6.
6.
5. Press
[MUTING]
→ - of the commander to write the data.
6. Adjust SAJ 3 ‘SCL’ as step 2 to 5 when receiving NTSC color-
bar.
6. Press
[MUTING]
→ - of the commander to write the data.
4-6. 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 items
with fine adjustment.
Write the data per each item number (
In cases where items are not well adjusted, rectify the items
with fine adjustment.
Write the data per each item number (
[MUTING]
+-).
4. Select item numbers “OPB0” (OP1), “OPB1” (OP2), “OPB2”
(OP3), “OPB3” (OP4) and respectively set the bit per model
with command buttons 3 and 6.
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.)
(This will also cancel Service Mode.)
4-4. DEFLECTION ADJUSTMENT
1.
Set to Service Mode.
2.
Input PAL color bar.
3.
Using the 1 and 4 button, select category GEO (Service
Mode).
Mode).
4.
Raise/lower the data using the 3 and 6 buttons.
Select and adjust the following items to obtain optimum
image.
Select and adjust the following items to obtain optimum
image.
VB1
VB2
VB3
VB4
VB2 = VB3 = VB4
VB2 = VB3 = VB4 (Difference is within 70mV)
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 ± 110mV.
the same line. Ideal difference level between VB2 and VB3
should be within ± 110mV.
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
5.
Input 525/60Hz signal.
6.
Using the 1 and 4 button select category GEO (Service
Mode).
Mode).
7.
Select and adjust the following items to obtain optimum
image. Raise/lower the data with the 3 and 6 buttons.
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
4-5. H-TRAPEZOID ADJUSTMENT
1. Receive cross hatch/dot signal.
2. Adjust RV1801 on C6 board to make H-trapezoid distortion
best.
– 35 –
KV-XG25M50
RM-952
4-7. PICTURE DISTORTION ADJUSTMENT (1)
Item Number 00 – 0B
PICTURE DISTORTION ADJUSTMENT (2)
GEO 0
HPS (H POSITION)
GEO 1
HSZ (H SIZE)
GEO 2
PAP (PIN AMP)
GEO 5
VSZ (V SIZE)
GEO 7
VLN (V LINEARITY)
GEO 4
VPS (V POSITION)
GEO 6
SCO (VERTICAL S-Correction)
GEO 8
BOW (AFC.BOW)
GEO 9
AGL (AFC.ANGLE)
GEO 3
TLT (TRAPEZIUM)
GEO 0A UCP (UPPER CORNER PIN)
GEO 0B LCP (LOWER CORNER PIN)
H-TRAPEZOID (Rotate RV1801)
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