DOWNLOAD Sony KV-DB29M60 Service Manual ↓ Size: 6.88 MB | Pages: 123 in PDF or view online for FREE

Model
KV-DB29M60
Pages
123
Size
6.88 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LEVEL 2
File
kv-db29m60.pdf
Date

Sony KV-DB29M60 Service Manual ▷ View online

– 10 –
KV-DB29M60/B
RM-GA001
The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
The controls and switch should be set as follows unless
otherwise noted:
Picture Control....................................."NORMAL"
Brightness Control..............................."NORMAL"
Perform the adjustments in order as follows :
1. Beam Landing
2. Convergence
3. Focus
4. G2(SCREEN)
5. White Balance
Note : Test Equipment Required.
1. Pattern Generator
5. Oscilloscope
2. Degausser
6. Landing Checker
3. DC Power Supply
7. XCV Adjuster
4. Digital Multimeter
SECTION 5
SET-UP ADJUSTMENTS
Preparation :
• Feed in the white pattern signal.
• Before starting, degauss the entire screen with the
degausser.
• In order to reduce the geomagnetism on the set's picture
tube, face it east or west.
5-1. BEAM LANDING ADJUSTMENT
1. Input a raster signal with the pattern generator.
2. Loose the deflection yoke(DY) mounting screw, and set
the purity control to the center as shown below:-
3. Position Neck Assy as shown below:-
4. Set the raster signal of the pattern generator to green.
5. Move the DY backward and adjust the purity control so
that green is in the center and blue and red are at the
sides evenly.
Red
Blue
Green
Purity control
......................................................................................................................................................................................................................
6. Then move the DY forward and adjust so that the entire
screen becomes green.
7. Now switch over raster signal to red then blue and
confirm the condition.
8. When the position of the DY is determined, tighten it with
the DY mounting screw.
9. If the beam does not land correctly in all the corners of
the screen, use magnet disc to correct it.
Neck assy
(For 34")
Neck assy
(For 29" and 32")
G2
G1
G3
Align the edge of
the neck assy with
the edge of the G2 grid.
Purity control
corrects this area.
Disk magnets or rotatable
disk magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
a
b
b
c
c
d
d
a
– 11 –
KV-DB29M60/B
RM-GA001
Moved RV9001 (H.STAT)
5-2. CONVERGENCE ADJUSTMENT
Preparation:
• Before starting, perform FOCUS adjustment.
• Receive dot/cross hatch pattern.
• Picture Mode "CUSTOM" (PIC 90%, BRT 50%,
COL 50%, HUE 50%, SHP 50%).
a) Vertical Static Convergence
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:-
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.
Center dot
R    G    B
R
G
B
4 pole
magnet
RV9001
4-pole
Y magnet
C1 Board
R
R
G
G
B
B
A
A
B
B
B
B
R
G
G
R
B
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
Neck assy
Neck assy
Red
Red
VM1 Board
VM1 Board
Blue
Red
Blue
Blue
Purity
6 Pole Magnet
4 Pole Magnet
DY pocket
6 Pole
Magnet
4 Pole
Magnet
– 12 –
KV-DB29M60/B
RM-GA001
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 B(120), Convergence Correct/Permaloy
Assy Correction to the misconverged areas.
TLV
R B
YCH
R
B
XCV
B
R
TLH
B
R
TLV
DY pocket
TLH Plate
H-TRAP
YCH
XCV
ON DY:
b
a
c
d
a-d : screen-corner
        misconvergence
a
b
c
d
Permalloy assembly
Fix a Permaloy Assy Correction to the misconverged
a to d: Piece B(120), Convergence Correct
or
Permaloy Assy Correction
– 13 –
KV-DB29M60/B
RM-GA001
5-3. FOCUS ADJUSTMENT
FOCUS adjustment should be completed before White
Balance adjustment.
1. Receive digital monoscope pattern.
2. Set Picture Mode to "STANDARD".
3. Adjust focus VR so that the center of the screen
becomes just focus.
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.
5-4. G2 (SCREEN) ADJUSTMENTS
1. Set the  following condition:
- Picture and Brightness to "STANDARD".
- TV to Video mode.
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 [RV9001] on the FBT until the
scanning line disappears.
FLYBACK TRANSFORMER  (T6805)
5-5. SUB BRIGHTNESS ADJUSTMENT
1. Set TV to RF Mode.
2. Input PAL monoscope to RF mode (OTHER model) and
NTSC monoscope (NTSC model).
3. Set the following condition:
i) Set "PICTURE MODE" to "CUSTOM" and adjust
PICTURE to 0% and BRIGHTNESS to 50%.
ii) Receive RF PAL monoscope signal
(RF NTSC monoscope: NTSC models)
iii) Adjust Sub BRT (service item COLR 008 SBRT)
to make 10 IRE Slightly glimmer.
iv) Apply the offset steps according to TV size as in Sub
Brightness offset table
Preset constant
Sub Brightness offset
5-6. WHITE BALANCE ADJUSTMENT
1. Set to Service Mode.
2. Input white raster signal using signal generator.
3. Set the following condition:
i) Receive 100 IRE PAL white signal.
ii) Set to "VIVID" mode.
SADJ 003 COL 60 
➔ 00
iii) Adjust White Balance
COLR
003
GDRV
004
BDRV
006
GCUT
007
BCUT
4) i) Receive PAL ALL White signal (10 uit)
ii) Set to "VIVID" mode
SADJ 003 COL 00 
➔ 100
iii) Adjust color offset
MCP
010
CBOF
011
CROF
Inch
R/G
B/G
34"
0.745
0.905
32"
0.775
0.915
29"
0.790
0.903
Inch
Offset
34"
Adjusted + 3 Steps
32"
Adjusted + 3 Steps
29"
Adjusted + 6 Steps
Cathode setting voltage:
170 V 
± 2 (VDC)
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