DOWNLOAD Sony KV-AR252M50 Service Manual ↓ Size: 6.16 MB | Pages: 80 in PDF or view online for FREE

Model
KV-AR252M50
Pages
80
Size
6.16 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-ar252m50.pdf
Date

Sony KV-AR252M50 Service Manual ▷ View online

– 33 –
KV-AR252M50/AR252M61/AR252M81
RM-W102
V.LINEARITY (VLIN), S CORRECTION (SCOR), EW
PARABOLA/WIDTH (EWPW), AND EW TRAPEZIUM
(EWTZ) ADJUSTMENTS
1. Input Monoscope signal.
2. Activate the Service Mode.
3. Select VLIN, SCOR, EWPW, and EWTZ with 
1
 and
4
.
4. Adjust with 
3
 and 
6
 for the best Picture.
5. Press 
[MUTING]
 then 
-
 to save into the memory.
EW TRAPEZIUM (EWTZ)
EW PARABOLA/WIDTH (EWPW)
S CORRECTION (SCOR)
V LINEARITY (VLIN)
HORIZONTOL PARALLELOGRAM (HPAR), H BOW
(HBOW), UPPER PIN (UCOP) AND LOW PIN (LCOP)
ADJUSTMENTS
1. Input Monoscope signal.
2. Activate the Service Mode.
3. Select the HPAR, HBOW, UCOP, and LCOP with 
1
and 
4
.
4. Adjust with 
3
 and 
6
 for the best picture.
5. Press 
[MUTING]
 then 
-
 to save into the memory.
UPPER PIN (UCOP)
LOW PIN (LCOP)
HORIZONTOLPARALLELOGRAM (HPAR)
HORIZONTOL BOW (HBOW)
3-5. PICTURE DISTORTION ADJUSTMENT
H. CENTER ADJUSTMENT (HPOS)
1. Input Monoscope signal.
2. Activate the Service Adjustment Mode.
3. Select the HPOS item with 
1
 and 
4
.
4. Adjust the value of HPOS with 
3
 and 
6
 for the best
horizontal center.
5. Press 
[MUTING]
 then 
-
 to save into the memory.
H. SIZE ADJUSTMENT (HSIZ)
1. Input Monoscope signal.
2. Activate the Service Adjustment Mode.
3. Select HSIZ with 
1
 and 
4
.
4. Adjust with 
3
 and 
6
 for the best horizontal size.
5. Press 
[MUTING]
 then 
-
 to save into the memory.
V. SIZE ADJUSTMENT (VSIZ)
1. Input Monoscope signal.
2. Activate the Service Adjustment Mode.
3. Select theVSIZ item with 
1
 and 
4
.
4. Adjust value of VSIZ with 
3
 and 
6
 for the best
vertical center.
5. Press 
[MUTING]
 then 
-
 to save into the memory.
 V. CENTER ADJUSTMENT (VPOS)
1. Input Monoscope signal.
2. Activate the Service Adjustment Mode.
3. Select VPOS item with 
1
 and 
4
.
4. Adjust value of  VPOS with 
3
 and 
6
 for the best
vertical center.
5. Press 
[MUTING]
 then 
-
 to save into the memory.
(
)
(
)
– 34 –
KV-AR252M50/AR252M61/AR252M81
RM-W102
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
VIF
SA
W
SIF
 SA
W
MAIN
Po
w
e
r
Supply
Stdb
y
Po
w
e
r
FSS TUNER
G/Y
B/PB
R/PR
L
R
24.576MHz
D
VD in
Rear A
V
 in
 F
ront A
V
 in
Mon out
Mon out
AV 1,2 in
AV 1 in
RGB/ DV
D
in
AC
 in ~
110-220V
CISPR/
PFC
Rela
y
LO
W B
Stdy 3.3
A
UDIO VCC
Hout
FBT
L
2ch
3ch
F
or India only
A
udio Amp
AT
T
NVM
Pin out
H-dr
iv
e
H-out
V
-out
DF/DQP
VM
RGB Amp
Rot Amp
LCC Amp
feedbac
k
5W 
R
5W
6+6
+12
3D W
oof
er
L,R
H
P
EW
, Hd
L,R
V+, V
-
PWM
RGB
SIRCS
Ke
y
 
b
uttons
PLL
I/O P
o
rt
I/O P
o
rt
VIF & SIF
PO
WER
Color
Decoder
YUV
Processor
J
ungle
RGB
A
D
C
D
A
C
Stereo
,
DSP
Micro
Te
x
t
CC & 
V
-chip
L
E
D
+B
– 35 –
KV-AR252M50/AR252M61/AR252M81
RM-W102
4-2. CIRCUIT BOARDS LOCATION
A Board
C Board
F Board
H1 Board
VM Board
BC Board
B Board
J1 Board
H2 Board
4-3. SCHEMATIC DIAGRAM INFORMATION
Note:
All capacitors are in 
µ
F unless otherwise noted.
All electrolytic capacitors are rated at 50V unless otherwise
noted.
All resistors are in ohms.
k
 = 1000
, M
 = 1000k
Indication of resistance which does not have rating electrical
power is as follows.
Pitch: 5 mm
Rating electrical power 1/4W (CHIP: 1/10W)
: nonflammable resistor.
¢
: internal component.
: panel designation or adjustment for repair.
All variable and adjustable resistors have characteristic curve
B unless otherwise noted.
Readings are taken with a color-bar signal input.
no mark
: Common
(
)
:  PAL
[
]
: NTSC 3.58
Readings are taken with a 10M
 digital multimeter.
Voltage are dc with respect to ground unless otherwise
noted.
Voltage variations may be noted due to normal production
tolerances.
All voltage are in Volt.
: Cannot be measured.
Circled numbers are waveform references.
:  B  +bus.
:  B  –bus.
 
 
k
: signal path.
Note: The reference number which starts with Wxxx
(eg: W003) indicates a wire to wire connection.
Note: Components marked as XX are not fitted on this
model.
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 
!
  are critical for safety. Replace only
with part number specified.
Note: “A” board schematic diagram is divided into 6 blocks.
Each block is named by its function and block “alphabet”.
eg: Processor (Block A)
Joint connection between boards can be identified using
the block alphabet followed by sequence numbering.
eg: -<HOUT-DEFL (A10) To D11
Meaning: Block A joint A10 is connected to Block D joint
D11
A
1
2
3
4
5
6
7
B
C
D
E
F
G
H
I
J
– 36 –
KV-AR252M50/AR252M61/AR252M81
RM-W102
4-3-1. J1 and H2 Boards Schematic Diagrams
1
2
3
4
5
6
7
8
WHT
8P
CN2410
DVD Y
GND
DVD BY
GND
DVD RY
GND
DVD L
DVD R
D2410
XX
XX
C2410
XX
R2421
XX
R2410
                 D2411
               XX
       PROTECTION
XX
C2411
XX
R2419
XX
R2411
               D2412
               XX
    PROTECTION
XX
C2412
XX
R2420
XX
R2412
              D2414
        XX
PROTECTION
XX
C2400
XX
R2415
XX
B
C2413
XX
R2414
D2415
XX
XX
C2401
XX
R2418
XX
B
C2414
XX
R2417
L
R
VB
VR
VG
J2410
5.0MM
JW2421
5.0MM
JW2410
5MM
JW2419
5MM
JW2411
5MM
JW2420
5MM
JW2412
5MM
JW2415
5MM
JW2400
5MM
JW2418
5MM
JW2401
J1
R-Y
B-Y
Y
L
R
TO B BOARD
     CN1421
(DVD TERMINAL)
B-BX1l12155-...-J1.-AR252
PROTECTION
5P
PHONO JACK
PROTECTION
VCC
GND
OUT
   RPM7240-H5 
SIRCS RECEIVER
IC3901
G
R
    SPB-25MVWF
WAKE INDICATOR
D3906
S3601
XX
F3601
470p
B
C3912
1SS133T-77
D3909
1
2
1
2
2P
CN3602
AC OUT
AC OUT
1
2
2P
CN3601
AC IN
AC IN
470p
B
C3915
FH001
XX
FH002
XX
XX
C3916
1
XX
CN3604
1
2
3
4
5
BLK
5P
CN3603
RD5.6ESB2
D3911
RD5.6ESB2
D3910
7.5MM
JW3601
7.5MM
JW3602
H2
TO H1 BOARD
CN3907
TO A BOARD
(POWER SUPPLY/
DEFLECTION)
CN600
TO F BOARD
CN4602
(FRONT PANEL)
B-BX1l12155-...-H2..-AR252
LED G
LED R
GND
SIRCS IN
3.3V
 SEN
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