Sony KV-XG25M8J Service Manual ▷ View online
– 37 –
KV-XG25M8J/XG25P50
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.
– 38 –
KV-XG25M8J/XG25P50
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)
KV-XG25M8J/XG25P50
RM-952
KV-XG25M8J/XG25P50
RM-952
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM
– 39 –
– 40 –
MAIN. TUVIF
YC JUNGLE
IC301
CXA2159S
CXA2159S
<slave:88H>
MONITOR
OUT
OUT
TV Y in
TV L in
TV R in
TV V in
C1 in
46
43
C1 out
CN1405
CN1405
V1 Y in
V1 L in
V1 R in
L out 2
R out 2
JACK BLOCK
J8402
PIN 9P
PIN 9P
VIDEO IN 1
B6
(Cispr, A/C Fuse, A/V input, Monitor out)
A
RED OUT
GREEN OUT
BLUE OUT
VIDEO AMP
Q701-Q712
Q701-Q712
N/S DRIVE
IC1800
IC1800
C6
(RGB OUT)
VM1
(Velocity Modulation)
B6
(Cispr, A/C Fuse, A/V input, Monitor out)
R out
CRT SOCKET
G out
CRT
A60LPN70X
A60LPN70X
NECK ASSY
DY
Y25RSA
Y25RSA
B out
R out
VM out
G out
B out
24
25
26
23
21
20
13
15
16
IK in
H. DRIVE
H. PULSE
E/W
VD+
VD-
VM DRIVE
Q5902/5906
Q5902/5906
H-OUT
Q511
2SC4927
Q511
2SC4927
V-OUT
IC503
TDA8172
IC503
TDA8172
HDT
T501
T501
H-DRIVE
Q506
2SC2688
Q506
2SC2688
PIN-CONT
IC502
NJM2903M
IC502
NJM2903M
PIN-OUT
Q505
IRF614
Q505
IRF614
PMT
T505
T505
HLT
T504
T504
+B
Audio Front Vcc
+9V
11V
7V
+5V
5V REG & RESET
IC002 MM1319AF
9V REC IC603
5V REC IC604
STB TRANS
T604
STB SW TR
Q605
2SK2845
2SK2845
SRT
T603
POWER
IC601
STR-F6656
STR-F6656
LINE FILTER
T601
LINE
FILTER
FILTER
T8601
T8602
T8602
THP
THP600
AC CORD
DGC
PNC
& ADC
SYSTEM
Ucom
IC001
CXP86449
CXP86449
RECEIVER
SBX1981-51P
IC2901
IC2901
H2
SIRCS
HALF
B G R
BLK
I2L
MEMORY
IC003
M24C08-BN6
M24C08-BN6
17
28 29 30 31
+audio 3D Vcc
-audio 3D Vcc
R out
L out
*
*
(System Controller, Y/C Jungle,
Deflection ,Tuvif, Front Amp,
Power Supply)
TU101
BTF-LG433 (XG25M8J)
BTF-LG413 (XG25P50)
<slave:C0H>
BTF-LG433 (XG25M8J)
BTF-LG413 (XG25P50)
<slave:C0H>
SP ASSY
AUDIO
PROCESSOR
PROCESSOR
IC8203
TDA7429S
TDA7429S
<slave: 90H>
AUDIO OUT
IC201
TX8223K
IC201
TX8223K
V 2 Y in
V3 Y in
V3 L in
V2 Y in
V2 L in
V2 R in
V3 R in
VIDEO IN 2
J2903 3P
VIDEO IN 1
(FRONT)
bom H2
VIDEO IN 1
(FRONT)
bom H2
AUDIO MIXER
IC8204 UPC4558G2
IC8204 UPC4558G2
Q8310
MIXER
MIXER
Q8310
MIXER
MIXER
H2
(Control
Panel)
Panel)
KV-XG25M8J/XG25P50
RM-952
KV-XG25M8J/XG25P50
RM-952
– 41 –
– 42 –
5-2. CIRCUIT BOARDS LOCATION
5-3. SCHEMATIC DIAGRAM
Note:
•
All capacitors are in µF unless otherwise noted.
•
All electrolytic capacitors are rated at 50V unless otherwise
noted.
noted.
•
All resistors are in ohms.
k
k
Ω = 1000Ω, MΩ = 1000kΩ
•
Indication of resistance which does not have rating electrical
power is as follows.
power is as follows.
Pitch: 5 mm
Rating electrical power 1/4W (CHIP: 1/10W)
Rating electrical power 1/4W (CHIP: 1/10W)
•
: nonflammable resistor.
•
¢
: internal component.
•
: panel designation or adjustment for rrepair.
•
All variable and adjustable resistors have characteristic curve
B unless otherwise noted.
B unless otherwise noted.
•
Redings are taken with a color-bar signal input.
no mark
no mark
: PAL
(
)
: SECAM
[
]
: NTSC 3.58
<<
>> : NTSC 4.43
•
Readings are taken with a 10M
Ω
digital multimeter.
•
Voltage are dc with respect to ground unless otherwise
noted.
noted.
•
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
•
All voltage are in V.
•
✽
: Cannot be measured.
•
Circled numbers are waveform references.
•
: B +bus.
•
: B –bus.
•
÷
: signal path.
Reference information
RESISTOR
: RN
METAL FILM
: RC
SOLID
: FPRD
NONFLAMMABLE CARBON
: FUSE
NONFLAMMABLE FUSIBLE
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE CEMENT
: RW
NONFLAMMABLE WIREWOUND
:
✽
ADJUSTMENT RESISTOR
COIL
: LF-8L
MICRO INDUCTOR
CAPACITOR
: TA
TANTALUM
: PS
STYROL
: PP
POLYPROPYLENE
: PT
MYLAR
: MPS
METALIZED POLYESTER
: MPP
METALIZED POLYPROPYLENE
: ALB
BIPOLAR
: ALT
HIGH TEMPERATURE
: ALR
HIGH RIPPLE
Note:
The component identified by shading and
mark
mark
!
are critical for safety. Replace only
with part number specified.
VM1
A
B6
H2
C6
Click on the first or last page to see other KV-XG25M8J service manuals if exist.