Sony KV-21FS150 (serv.man3) Service Manual ▷ View online
KV-21FS150
KV-21FS150
13
2-2. CONVERGENCE
Before starting convergence adjustments:
1
Perform FOCUS, VLIN and VSIZE adjustments.
2. Set BRIGHTNESS control to minimum.
3. Set Picture mode to STANDARD.
4. Feed in dot pattern.
Vertical Static Convergence
1. Adjust the 4 pole magnet to converge red, green and blue dots in
the center of the screen.
Center dot
R G B
R
G
B
4 pole magnet
RV750
H. STAT
H. STAT
C/CV Board
2. Tilt the 4 pole magnet and adjust static convergence to open or
close the 4 pole magnet.
When the 4 pole magnet is moved in the direction of arrow
A
and
B
, the red, green, and blue dots move as shown below:
Moved RV750 (H.STAT)
R
R
G
G
B
B
A
B
B
A
B
R
G
G
R
B
Horizontal Static Convergence
If the blue dot does not converge with the red and green dots, use the 6
pole magnet to adjust as shown:
pole magnet to adjust as shown:
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
6 Pole Magnet
6 Pole
Magnet
4 Pole
Magnet
DY pocket
Purity
4 Pole Magnet
KV-21FS150
KV-21FS150
14
Convergence Rough Adjustment
Before performing this adjustment, perform Horizontal and Vertical Static
Convergence Adjustment.
Convergence Adjustment.
Input cross hatch pattern.
a)
TLH
Adjust the horizontal convergence of red and blue dots by inserting
TLH Correction Plate to the DY pocket (left or right).
TLH Correction Plate to the DY pocket (left or right).
b)
YCH
Adjust YCH to balance Y axis.
c)
TLV
Adjust YCh to balance Y axis.
d)
XCV
Adjust XCV to balance X-axis.
TLV
R B
YCH
R
B
XCV
B
R
TLH
B
R
YCH
DY pocket
DY pocket
XCV
TLV
XCV
TLV
TLH Plate
ON DY:
Screen Corner Convergence
Affi x a Piece A (90), Convergence Correct/Permaloy Assy Correction to
the misconverged areas.
the misconverged areas.
b
a
c
d
a-d : screen-corner
misconvergence
misconvergence
a1
b1
c1
d1
a1~d1:Piece A (90), Convergence Correct
or
Permaloy Assy Correction
2-3. FOCUS
FOCUS adjustment should be completed before White Balance
adjustment. (See 4-4. White Balance 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. Confi rm magenta ring is not noticeable. In case magenta ring is
obvious, then adjust FOCUS VR to balance magenta ring and
FOCUS.
FOCUS.
SCREEN
FOCUS
KV-21FS150
KV-21FS150
15
2-4. SCREEN (G2)
1. Before beginning adustment procedure:
-Set Picture and Brightness to “STANDARD”.
-Set TV to Video mode.
-Set WHBL 016 “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 shown
below:
165
± 2VDC
4. Adjust SCREEN VR on the FBT until the scanning line disappears.
5. Set WHBL 16 “RGBB” back to 00.
KV-21FS150
KV-21FS150
16
3-1. REMOTE ADJUSTMENT BUTTONS AND INDICATORS
MUTING
(Enter into
memory)
memory)
8
(Initialize)
5
Display previous
Category
Category
3
Increase
Data value
Data value
0
(Remove
from memory)
from memory)
ENTER
(Enter into
memory)
memory)
6
Decrease
Data value
Data value
1
Display next
Item
Item
2
Display next
Category
Category
4
Display previous
Item
Item
DISPLAY
(Service Mode)
POWER
(Service Mode)
VOLUME (+)
(Service Mode)
RM-YA005
SECTION 3: CIRCUIT ADJUSTMENTS
Electrical Adjustments by Remote Commander
Use the Remote Commander
(RM-YA005)
to
perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
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