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Model
KV-HG21M85
Pages
69
Size
11.17 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-hg21m85.pdf
Date

Sony KV-HG21M85 Service Manual ▷ View online

– 16 –
KV-HG21M81/HG21M85
   RM-GA002
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
2. Degausser
3. DC Power Supply
4. Digital Multimeter
SECTION 3
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.
3-1. BEAM LANDING ADJUSTMENT
1. Input a raster signal with the pattern generator.
2. Loosen the deflection yoke mounting screw, and set the
purity control to the center as shown below.
3. Set the raster signal of the pattern generator to green.
4. Move the deflection yoke (DY) backward and adjust the
purity control so that green is in the center and blue and
red are at the sides evenly.
5. Then move the DY forward and adjust so that the entire
screen becomes green.
6. Now switch over raster signal to red then blue and
confirm the condition.
...................................................................................................................................................................................................................... ...........
5. Oscilloscope
6. Landing Checker
7. XCV Adjuster
Purity control
Red
Blue
Green
7. When the position of the DY is determined, tighten it
with the DY mounting screw.
8. If the beam does not land correctly in all corners of the
screen, use magnet disc to correct it.
3-2. CONVERGENCE ADJUSTMENT
Preparation :
• Before starting, perform FOCUS adjustment.
• Picture mode STANDARD.
• Receive dot/cross hatch pattern.
a) Vertical Static Convergence
Purity control
corrects this area.
Disc magnets or rotatable
disc magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
a
b
b
c
c
d
d
a
Center dot
R    G    B
R
G
B
4 pole magnet
C/CV Board
– 17 –
KV-HG21M81/HG21M85
   RM-GA002
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:
Moved 4 pole Magnet
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.
R
R
G
G
B
B
A
B
B
A
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
6 Pole Magnet
4 Pole Magnet
DY pocket
Purity
6 Pole
Magnet
4 Pole
Magnet
c) 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.
d) 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
TLV
ON DY:
TLV
XCV
YCH
DY pocket
DY pocket
TLH Plate
XCV
b
a
c
d
a-d : screen-corner
        misconvergence
a1~d1:Piece A (90), Convergence Correct
or
Permaloy Assy Correction
a1
b1
c1
d1
B
R
G
G
R
B
– 18 –
KV-HG21M81/HG21M85
   RM-GA002
3-3. FOCUS ADJUSTMENT
FOCUS adjustment should be completed before W/B
adjustment.
1. Receive digital monoscope pattern.
2. Set Picture Mode to "VIVID".
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.
3-4. G2 (SCREEN) ADJUSTMENT
1. Set the following condition:
– Picture and Brightness to "STANDARD".
– TV to Video mode.
– WHBL 016 "RGBB" to 01
2. Connect R, G, B of the C/CV 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 016 "RGBB" back to 00.
170 – 2VDC
3-5. WHITE BALANCE ADJUSTMENT
1. Set to Service Mode.
2. Input white raster signal using signal generator.
3. Set the following condition:
Picture "VIVID", PICT 006 "WTS" to 00.
4. At Highlight condition, select WHBL 02 "RDRV" and 03
"GDRV" 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 Highlight and Cutoff condition
until it reaches its target.
7. Write data into memory by pressing [MUTING] 
t -.
8. Finally set PICT 006 "WTS" back to its original data.
3-6. SUB BRIGHT ADJUSTMENT
1. Set TV to RF mode.
2. Input PAL monoscope to RF mode.
3. Set Brightness 50% and Picture to "MINIMUM".
4. Select WHBL 010 "SBRT" with 1 and 4 button of the
remote commander and adjust its data with 3 and 6
so that cut-off level is 10 IRE, slightly glimmer: 20 IRE
Then +2 steps offset.
5. Write into the memory by pressing [MUTING] 
t -.
VIVID : 45000K + 8 MPCD
Center data :
X : 0.2444
Y : 0.2466
– 19 –
KV-HG21M81/HG21M85
   RM-GA002
ii.
PIP Model (KV-HG21M86)
line 1 and line 2 is same as above. Only line 3 is different same as SP model. Refer as below:
When VIF category is selected
SECTION 4
CIRCUIT ADJUSTMENTS
4-1. ADJUSTMENTS 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
i.
NON PIP Model (KV-HG21M81/M85)
service data
NVM
field
channel no./
category
in decimal
item name
in decimal
NG
service command
frequency
video input name
GEOM
006
HSIZ
031
x
SERVICE
60
S VIDEO 1
software
service data
reserved
power on time
release ID
version
in binary
for factory
color system
(decimal)
SGA01
0.69 *
0001 1111
FF FF
NTSC3
65535
Status SID,LOCK,SL
status
status
status
0:not locked
IVW,
WBC,
status
S/N LEVEL status status
DCXO Flash
Status Display
(no signal)
IVWF
HBC
BCF
(0-7)
GL
PTW
Value
Area
111
11
11
1
7
1
1
FG
xy 111 000000   000000
S _ _ : BX1S Sony
A _ _ : BX1S Aiwa
L _ _ : BX1L Full
B _ _ : BX1L Basic
D _ _ : DVD Combo
Z _ _ : Sound Special
_ U S :  US
_ N T : Taiwan/Philippines
_ T R : Latin/Brazil
_ G A :General Area
Serial no. of the M/P release
for each destination :
0X: use for FY03
1X: use for FY04
2X: use for FY05
3X: use for FY06
4X: use for FY07
U : USA - English/Spanish/French/Portuguese (typically)
A : GA - English/Arabic/Persian
M : GA - English/Simplified Chinese/Thai
R : GA - English/Russian/Vietnamese
H : NTSC - English/Complicated Chinese
1 1
1
Needed for Nicam DCXO alignment Purpose
x
y
Value of x=0 -Unknown, 1-NICAM, 2-A2, 3-KOREAN, 4-US, 5-Japan, 6-AV Stereo
Value of y=0 -Mono, 1-Stereo, 2-Bilingual, 4-SAP/Single
F G
DCXO Flash Value
N
NR table status (0-9) NR Table Indication
Disp. Table
Condition
0
NR0
3D Intell Pic Off + PAL4.43
1
NR1
3D Intell Pic On + PAL4.43 + SN=6,7 (Video)
2
NR2
3D Intell Pic On + PAL4.43 + SN=5
3
NR3
3D Intell Pic On + PAL4.43 + SN=4,3
4
NR4
3D Intell Pic On + PAL4.43 + SN=2,1
5
NTSC0
3D Intell Pic Off + NTSC3.58
6
NTSC1
3D Intell Pic On + NTSC3.58 + SN=6,7 (Video)
7
NR1_RF
3D Intell Pic On + PAL4.43 + SN=6,7 (RF)
8
NTSC1_RF 3D Intell Pic On + NTSC3.58 + SN=6,7 (RF)
9
NR_NA
Not PAL4.43 NTSC3.58
line 1
line 2
line 3
Status SID,
NR
LOCK,SL
status
status
table
status
0:not locked
IVW,
WBC,
status status S/N LEVEL status status
DCXO Flash
Status Display
(no signal)
IVWF
HBC
(0-9)
BCF
(0-7)
GL
PTW
Value
Area
111
11
11
N
1
7
1
1
FG
xy 111 000000   000000
Signal
S/N
Booster
before
Status
signal
0:Off;1:On
booster on.
111
11
11
1
7
1
1
FG
xy 111
1
A
F
2
5
AGC value
S/N
captured
after signal
before
booster
signal
on
line 3
line 3
Same as other category
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