Sony KV-XA21M81 Service Manual ▷ View online
– 33 –
KV-XA21M81
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:
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
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.
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.
2. Input a NTSC 3.58 color-bar, into Video.
3. Set the following condition:
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 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.
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).
(Service Mode).
3.
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.
Service Item
GEO : 00
HPS
H POSITION
01
HSZ
H SIZE
02
PAP
PIN AMP
03
TLT
TRAPEZIUM
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
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.
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
TRAPEZIUM
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.
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 (
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.
"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.)
return to the data that was set on the shipment from the
factory.
(This will also cancel Service Mode.)
– 34 –
KV-XA21M81
RM-952
4-6. PICTURE DISTORTION ADJUSTMENT
Item Number 00 – 0B
GEO 1
HSZ (H SIZE)
GEO 3
TLT (TRAPEZIUM)
GEO 0A UPN (UPPER CORNER PIN)
GEO 0B LPN (LOWER CORNER PIN)
GEO 5
VSZ (V SIZE)
GEO 0
HPS (H POSITION)
GEO 9
AGL (AFC.ANGLE)
GEO 8
BOW (AFC.BOW)
GEO 2
PAP (PIN AMP)
GEO 4
VPS (V POSITION)
GEO 7
VLN (V LINEARITY)
GEO 6
SCO (VERTICAL S-Correction)
– 36 –
– 35 –
KV-XA21M81
RM-952
KV-XA21M81
RM-952
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM
YC JUNGLE
IC301
CXA2159S
CXA2159S
<slave:88H>
INTERNAL NTSC
COMB FILTER
IC302
TDA9183T
COMB FILTER
IC302
TDA9183T
MONITOR
OUT
OUT
TV V in
TV L in
TV R in
TV V in
Mon out
V1 out
COMB Y in
COMB C in
V1 V in
43
6
9
7
43
V1 V in
V1 L in
V1 R in
V2 R in
V2 V in
V2 V in
4
V2 L in
L out 2
R out 2
JACK BLOCK
VIDEO IN 1
AUDIO
PROSESSOR
PROSESSOR
IC203
TDA7442D
<slave: 80H>
AUDIO OUT
IC201
TA8223K
TA8223K
RED OUT
GREEN OUT
BLUE OUT
IC700
TDA6107Q
TDA6107Q
VM DRIVE
2SC4793
Q5965
2SC4793
Q5965
SP ASSY
VM
COIL
COIL
CRT SOCKET
CRT
A51LPT70X
A51LPT70X
DY
Y21RSA-S
Y21RSA-S
B out
G out
R out
VM out
VM in
R out
G out
B out
24
25
26
23
21
20
13
15
16
IK in
H. DRIVE
H. PULSE
E/W
VD+
VD-
H-OUT
Q511
2SD2578-CA
Q511
2SD2578-CA
V-OUT
IC503
AN5522
IC503
AN5522
HDT
T501
T501
H-DRIVE
Q506
2SD774-34
Q506
2SD774-34
PIN-CONT
IC502
NJM2903M
IC502
NJM2903M
PIN-OUT
Q505
IRF614-LF
Q505
IRF614-LF
PMC
L509
L509
HLC
L510
L510
FBT
T503
NX-1748
T503
NX-1748
+B
Audio Front Vcc
+9V
11V
7V
+5V
5V REG & RESET
IC002 MM1319AF
9V REC IC603
5V REC IC604
STB TRANS
T604
SRT
T603
SYSTEM
Ucom
IC001
CXP86449
CXP86449
RECEIVER
SBX1981-51RP
IC901
IC901
SIRCS
R G B
BLK
R G B
BLK
I2L
MEMORY
IC003
M24C08-BN6(A)
M24C08-BN6(A)
28 29 30 27
F
(CISPR)
STB SW TR
Q605
2SK2845
2SK2845
POWER IC
IC601
STR-F6654
STR-F6654
LINE FILTER
T601
LINE
FILTER
FILTER
T4602
THP
THP600
AC CORD
DGC
MAIN. TUVIF with
STEREO DECODER
(MSP3415)
STEREO DECODER
(MSP3415)
<slave: 84H>
TU101
BTF-LG433
BTF-LG433
J401
6P
VIDEO IN 2
(FRONT)
(FRONT)
J902
3P
A
System Controller, Y/C Jungle, Deflection, Tuvif,
Front Amp, Power Supply)
C1
(Video Amp NS Rotation VM)
N/S DRIVE
IC1800
IC1800
Text Recoder with
u-com
IC801
SAA5261
SAA5261
<slave:58H>
V1
(TELE TEXT)
(
)
KV-XA21M81
RM-952
– 37 –
5-2. CIRCUIT BOARDS LOCATION
A
V1
F
C1
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