DOWNLOAD Sony KV-SW252M50 Service Manual ↓ Size: 5.37 MB | Pages: 69 in PDF or view online for FREE

Model
KV-SW252M50
Pages
69
Size
5.37 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sw252m50.pdf
Date

Sony KV-SW252M50 Service Manual ▷ View online

– 9 –
KV-SW252M50/M80
   RM-GA002
Moved RV750 (H.STAT)
R
R
G
G
B
B
A
A
B
B
B
B
R
G
G
R
B
2-2. CONVERGENCE ADJUSTMENT
Preparation:
• Before starting, perform FOCUS adjustment.
• Picture Mode "SOFT"
• Receive dot/cross hatch pattern.
1. (Moving vertically), adjust the 4 pole magnet to
converge red, green and blue dots in the center of
the screen.
2. Tilt the 4 pole magnet and adjust static convergence
to open or close the 4 pole magnet.
3. When the 4 pole magnet is moved in the direction of
arrow A and B, the red, green and blue dots moves
as shown below:-
a) Vertical Static Convergence
b) Horizontal Static Convergence
If the blue dots does not converge with the red and
green dots, use the 6 pole magnet to adjust in
the manner described below:-
c) Y Separation axis correction magnet adjustment.
1. Receive cross hatch signal.
2. Set Picture to "MINIMUM", Brightness to "STANDARD".
3. Adjust the Y separation axis correction magnet on
the Neck Assembly so that the horizontal lines at
the top and bottom of the screen are straight.
Neck assy
Neck assy
Red
Blue
Red
Blue
VM board
VM board
6 Pole Magnet
4 pole Magnet
DY pocket
Purity
6 Pole
Magnet
4 Pole
Magnet
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
4 pole magnet
RV705
H. STAT
RV1800
G2 (SCREEN) 
C Board
Center dot
R     G     B
G
R
B
– 10 –
KV-SW252M50/M80
   RM-GA002
b
a
c
d
a-d : screen-corner
        misconvergence
a1
b1
c1
d1
a1~d1: Piece A(90), Convergence Correct
or
Permaloy Assy Correction
d) Convergence Rough Adjustment
Preparation:
• Before starting this adjustment, adjust the
horizontal and vertical static convergence.
Input cross hatch pattern.
i)
TLH
Adjust the horizontal convergence of red and blue
dots by inserting TLH Correction Plate to the DY
pocket(left or right).
ii)
YCH
Adjust YCH to balance Y axis.
iii) TLV
Adjust the vertical convergence of red and blue dots.
iv) XCV
Adjust XCV to balance X-axis
e) Screen Corner Convergence
Affix a Piece A(90), Convergence Correct/Permaloy Assy
Correction to the misconverged areas.
.
TLV
R B
YCH
R
B
XCV
B
R
TLH
B
R
ON DY :
(VR1)
TLV1 (no need to adjust)
DY pocket
DY pocket
TLH Plate
(VR3)
TLV2
(XCV)
(VR2)
YCH
– 11 –
KV-SW252M50/M80
   RM-GA002
Cathode setting voltage:
170 V 
± 2 (VDC)
2-3. FOCUS ADJUSTMENT
FOCUS adjustment should be completed before W/B
adjustment.
1. Receive digital monoscope pattern.
2. Set Picture Mode to "DYNAMIC".
3. Adjust focus VR to obtain a just focus at the
center of the screen.
4. Change the receiving signal to white pattern
and blue back.
5. Confirm magenta ring is not noticeable. In case
magenta ring is obvious, then adjust FOCUS VR
to balance magenta ring and FOCUS.
2-4. G2 (SCREEN) ADJUSTMENTS
1. Set the  following condition:
- Picture and Brightness to "STANDARD".
- TV to Video mode.
- WHBL 16 "RGBB" to 01.
2. Connect R,G,B of the  C board cathode to
oscilloscope.
3. Adjust Brightness to obtain the cathode value
to the value stated below.
4. Adjust SCREEN VR on the FBT until the scanning line
disappears.
5. Finally set WHBL 16 "RGBB" back to 00.
FLYBACK TRANSFORMER  (T503)
Focus
Screen
2-5. WHITE BALANCE ADJUSTMENT
1. Set to Service Mode.
2. Input white raster signal using signal generator.
3. Set the following condition:
Picture "DYNAMIC", PICT 006 "WTS" to 00.
4. At Highlight condition, select WHBL 003 "GDRV"
and 004 "BDRV" with 1 and 4 button of the
remote commander then adjust the data with
3 and 6 button.
5. At Cutoff, select WHBL 000 "BKOR" and 001 "BKOG"
and adjust the data.
6. Perform adjustment at Hightlight and Cutoff condition
until it reaches its target.
7. Write data into memory by pressing [MUTING]
➔-.
8. Finally set PICT 006 "WTS" back to its original data.
– 12 –
KV-SW252M50/M80
   RM-GA002
SECTION 3
CIRCUIT ADJUSTMENTS
3-1. ADJUSTMENT WITH COMMANDER
Service adjustments to this model can be performed using the supplied remote commander RM-GA002.
a. ENTERING SERVICE MODE
With the unit on standby
This operation sequence puts the unit into service mode.
This screen display is:
b. METHOD OF CANCELLATION FROM SERVICE MODE
Set the standby condition (Press [POWER] button on the commander), then press [POWER] button again, hereupon it becomes
TV mode.
c. METHOD OF WRITE INTO MEMORY
1. Set to Service Mode.
2. Press 
1
 (UP) and 
4
 (DOWN), to select the adjustment item.
3. Change item by pressing 
3
6
.
4. Press [MUTING] button to indicate WRITE on the screen.
5. Press 
-
 button to write into memory.
d. MEMORY WRITE CONFIRMATION METHOD
1. After adjustment, pull out the plug from AC outlet, and then plug into AC outlet again.
2. Turn the power switch ON and set to Service Mode.
3. Call the adjusted items again to confirm adjustments were made.
  
t [DISPLAY] t 5 t [VOL $+% ] t [POWER]
Item no.
Service data
NVM
Service
Field
Channel no./
Category
in decimal
Item name
in decimal
NG
Command
Frequency
Video Input Name
GEOM
006
EWPW
031
x
SERVICE
60
S VIDEO 1
Software
Service data
Reserved
Power On Time
Release ID
Version
in binary
for factory
Color System
(decimal)
SUS01
3.50M
0001 1111
FF FF
NTSC3
65553
Status SID,
Lock, SL
:not locked
(no signal)
Status
Status BC,
Status
Status S/N
Status
Status Display
:locked
VW, IVWF
HBC
BCF
LEVEL (0-7)
GL
Area
111
11
11
1
7
11
ZZ xy 1 1 000000 000000
Status
PTW
S
:  for Sony
A
:  for AIWA
L
: BX1L Full
B
: BX1L Basic
D
: DVD Combo
U S : Taiwan/Korea/Philippines
G A : General Area
01 : Serial no. of the M / P release for each destination
1, 4
Select the adjustment item.
r
3, 6
Raise/lower the data value.
r
[MUTING]
Writes.
r
-
Executes the writing.
ZZ : DCXO Flash Value
xy
: Value of x
:
Value of y
0 - unknown
0 - Mono
1 - BTSC
1 - Stereo
2 - A2
2 - Bilingual
3 - NICAM
4 - SAP/Single
4 - KOREAN
5 - Japan
6 - AV Stereo
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