DOWNLOAD Sony KV-SR252M89K Service Manual ↓ Size: 5.92 MB | Pages: 78 in PDF or view online for FREE

Model
KV-SR252M89K
Pages
78
Size
5.92 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sr252m89k.pdf
Date

Sony KV-SR252M89K Service Manual ▷ View online

– 10 –
KV-SR252M63K/M89K/N63K
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-SR252M63K/M89K/N63K
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-SR252M63K/M89K/N63K
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
– 13 –
KV-SR252M63K/M89K/N63K
RM-GA002
e. OTHER FUNCTION VIA REMOTE COMMANDER
7, -
All the data becomes the values in memory.
8, -
All user control goes to the standard state.
[Display], -
Service data initialization (Be sure not to use usually.)
2, 5
Select Device or Category (Up, Down)
3-2. ADJUSTMENT METHOD
Item Number 000 HPOS
This explanation uses H POSITION as an example.
1. Select "000 HPOS" with the 
1
 and 
4
 buttons, or 
2
 and 
5
.
2. Raise/lower the data with the 
3
 and 
6
 buttons.
3. Select the optimum state. (The standard is IF for PAL reception.)
4. Write with the [MUTING] button. (The display changes to WRITE.)
5. Execute the writing with the 
-
 button. (The WRITE display will be changed to red color while excuting, and back to
SERVICE.)
Example on screen display :-
Use the same method for all Items. Use 
1
 and 
4
 to select the adjustment item, use 
3
 and 
6
 to adjust, write with [MUTING],
then execute the write with 
-
.
Note : 1. In [WRITE], the data for all items are written into memory together.
2. For adjustment items that have different standard data between 50Hz or 60Hz, be sure to use the respective input
signal after adjustment.
031
1111
50
NTSC3 65553
HPOS
0001
GEOM
SUS01
000
3.50M
FF FF
SERVICE
031
1111
50
NTSC3 65553
HPOS
0001
GEOM
SUS01
000
3.50M
FF FF
WRITE
031
1111
50
NTSC3 65553
HPOS
0001
GEOM
SUS01
000
3.50M
FF FF
WRITE
GREEN
GREEN
Write with [MUTING]
Write executed with - 
RED
The WRITE display
then the display
returns to green
SERVICE.
Adjusted with 3 
and 6 buttons.
Page of 78
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