Sony KV-28FS20U Service Manual ▷ View online
25
Same Level
B-Out Waveform
1.
Input a Phillips pattern.
2.
Set the picture control to minimum.
3.
Enter into the ‘Picture Adjustment’ service menu.
4.
Adjust the ‘Sub-Brightness’ data so that there is barely a
difference between the 0 IRE and 10 IRE signal levels.
difference between the 0 IRE and 10 IRE signal levels.
1.
Input a video that contains a small 100% area on a black
background.
background.
2.
Set the picture control to maximum.
3.
Connect an oscilloscope to Pin 3 of CN301 [A Board].
4.
Enter into the ‘Picture Adjustment’ service menu.
5.
Adjust the ‘Sub-contrast’ data to obtain a black to white
amplitude of 2.20V.
amplitude of 2.20V.
1.
Receive a PAL colour bar video signal.
2.
Connect an oscilloscope to Pin 3 of CN301 [A Board].
3.
Enter into the ‘Picture Adjustment’ service menu.
4.
Adjust the ‘Sub-colour’ data so that the Cyan, Magenta and
Blue colour bars are of equal height
as indicated
below.
below.
Note:
The data indicated in the ‘TV STATUS’ table is
dependant on destination, screen size and country.
dependant on destination, screen size and country.
MSP
AGC ON/OFF
ON
Constant gain CDB
0
FM prescale FMP
36
Zwei mono-st WHI
36
Zwei st-mono WLO
18
Zwei mono-bi WMH
36
Zwei bi-mono WLO
18
Time Zwei WML
41
Fawct limit
10
Fawct soll init FAW
12
Fawer tol
2
Nicam Err Max CCT
10
Nicam Err Min
0
Time Nicam
31
Audio clock ACO
HIZ
Scart prescale
25
Scart volume
64
Nicam Prescale I
127
Nicam Prescale L
97
Nicam Prescale BG
97
Nicam Prescale DK
97
IC STATUS (CXA2076 / CXA2040)
CXA2076
H lock
0
IKR
1
VNG
0
X-RAY
0
Colour system
2
CV1 sync
0
CXA2040
Sync sep
0
S1 mode pin
01
S2 mode pin
01
TUNER
Tuner status
01101100
TV STATUS BE3E
Text system
C TEXT 2
Dolby
YES
Text language set
WEST
Menu language set
WEST
Destination
UK
Ageing
DISABLED
Auto Shut Off
ENABLED
Size
28
Colour trap sw
ALL
Velocity mod
ON
AFT STATUS
HIGH
Digital RF
NO
Micro/Jungle
SDA30C263/CXA2076
Dynamic Convergence
Range
Adj Off - 42
H stat
Adj Off - 63
H amp l
Adj Off - 63
H amp r
Adj Off - 63
Up Y
Adj Off - 63
Low Y
Adj Off - 63
Y up l
Adj Off - 63
Y up r
Adj Off - 63
Y low l
Adj Off - 63
Y low r
Adj Off - 63
Mbow up l
Adj Off - 63
Mbow up r
Adj Off - 63
Mbow low l
Adj Off - 63
Mbow low r
Adj Off - 63
V Stat
Adj Off - 63
SUB BRIGHTNESS ADJUSTMENT
SUB CONTRAST ADJUSTMENT
SUB COLOUR ADJUSTMENT
26
A
TUNER / IF
RV01
RV02
RV02
LV01
TP1
V SIZE
V LIN
S CORRECTION
V CENTRE
H SHIFT
H SIZE
PIN AMP
TILT
CORNER PIN
V ANGLE
1.
Input an off air signal of between 60-100dBuV / 75 ohm
terminated, via the tuner socket.
terminated, via the tuner socket.
2.
Enter into the ‘IF Adjustment’ service mode [i.e ‘TT59’] to fix
the I.F frequency to 39.9MHz.
the I.F frequency to 39.9MHz.
3.
Enter into the service mode and select ‘Current TV status’.
4.
Adjust the I.F coil [LV01] until the ‘AFT Status’ indicates a
‘Window’ condition.
‘Window’ condition.
1.
Receive a signal of 63dBuV / 75 ohm terminated, via the tuner
socket.
socket.
2.
Measure the voltage at test point 1 [A Board].
3.
Adjust RV01 control to obtain a voltage of 3.0V +/- 0.3V.
1.
Enter into the ‘Geometry Adjustment’ service menu.
2.
Select and adjust each item in order to obtain the optimum
image.
image.
I.F ADJUSTMENT
S
TUNER AGC ADJUSTMENT
DEFLECTION SYSTEM ADJUSTMENT
GEOMETRY ADJUSTMENT
V size
Adj
V position
Adj
S Correction
Adj
V Linearity
Adj
H size
Adj
H position
Adj
Pin Amp
Adj
Pin Phase
Adj
AFC Bow
Adj
AFC Angle
Adj
EHT V
1
EHT H
0
Lo Corn Pin
Adj
Up Corn Pin
Adj
27
4-2. ‘TT’ TEST MODE :
00
Cancel Test mode
01
Picture Maximum
02
Picture Minimum
03
Volume & Headphone Volume 35%
04
Volume & Headphone Volume 50%
05
Volume & Headphone Volume 65%
06
Volume & Headphone Volume 80%
07
Ageing mode Enable/Disable
08
Shipping Condition
09
Display TV status
10
No function
11
Sub Picture adjustment
12
Sub Colour adjustment
13
Sub Brightness adjustment
14
Text H-Position adjustment
15
Rotation Test
16
No function
17
No function
18
No function
19
No function
20
No function
21
Destination A/D (East Menu/West Text)
22
Destination L (West Menu/West Text)
23
Destination E (West Menu/West Text)
24
Destination U (West Menu/ West Text)
25
Destination D (East Menu/Greek Text)
26
Destination B (East Menu/West Text)
27
Destination K (East Menu/East Text)
28
Destination R (Russian Menu/Russian Text)
29
No function
30
No function
31
Toggle Auto Shutoff Disable
32
No function
33
No function
34
No function
35
No function
36
No function
37
No function
38
Default Dynamic Convergence Settings
39
No function
40
No function
41
Re-initialize the NVM
42
Re-initialise geometry settings
43
Default Programme info in NVM with factory settings
44
Default favourite pages to 100,101,102 and 103
45
Switch off all Parental locks
46
No function
47
Default MSP settings
48
Set NVM as Non-virgin
49
Set NVM as virgin
50
No function
51
Dolby Pro-Logic On, Volume 90%
52
Noise On Left Speaker
53
Noise On Right Speaker Only
54
Noise On Centre Speaker Only
55
Noise On Surround Speaker Only
56
Set Colour to Minimum and Picture to Maximum
57
Set Colour and Picture to Minimum and Adjust
Sub-Brightness
Sub-Brightness
58
-
60
-
60
No function
61
N-board Reset
62
Toggle the 3.3v regulator on A2-board
63
Toggle Attenuation switch on Port Expander
64
Smart Link Test- Toggle the Smart Link pin 50 times
65
No function
66
No function
67
No function
68
Pre-set AV Labels
69
No function
70
No function
71
Select Compact Text/Compact Text-2
72
Balance Left/Right (press
Ä
key for balance left,
Å
for balance right, and
Æ
for centre balance)
73
Dual Sound Headphones (
Æ
key for A,
Ç
key for B)
74
Dual Sound Speakers (
Æ
key for A,
Ç
key for B)
75
DSP Bypass
76
Dolby Enabled/Disabled toggle
77
Setup trap switch
78
Set Screen Size
79
Wide Setup
80
No function
81
Velocity Mod ON
82
Velocity Mod OFF
‘TT’ Mode is available by pressing the Test key twice. It is exited by pressing 0 twice, or by pressing the Test key, or by pressing the TV key, or by
pressing the TV key, or by switching the set into standby.
The functions described below are available by pressing 2 digits:
pressing the TV key, or by switching the set into standby.
The functions described below are available by pressing 2 digits:
28
83
Special Picture Mode - Personal mode, reset &
brightness = 0
brightness = 0
84
Text Interlace odd (Non interlace mode = 3)
85
Text Interlace even (Non interlace mode = 2)
86
Auto Cut Off ENABLE
87
Auto Cut Off DISABLE
88
Diagnostics OFF
89
Diagnostics ON
90
No function
91
Clear & disable OSD
92
Enable OSD
93
D/K Nicam Enable
94
D/K Nicam Disable
95
Reset language select menu on power up
96
Set all programme labels to default
97
Toggle MHEG Mode
4-3. ‘T’ TEST MODE :
Key
T Mode Function
Volume +
Volume Maximum
Volume -
Volume Minimum
Picture +
Picture Maximum
Picture -
Picture Minimum
Colour +
Colour Maximum
Colour -
Colour Minimum
Brightness +
Brightness Maximum
Brightness -
Brightness Minimum
Hue +
Hue Maximum
Hue -
Hue Minimum
Sharpness +
Sharpness Maximum
Sharpness -
Sharpness Minimum
Balance Left
Balance Full Left
Balance Right
Balance Full Right
Treble +
Treble Maximum
Treble -
Treble Minimum
Bass +
Bass Maximum
Bass -
Bass Minimum
Analogue +
Select Analogue Value Maximum
Analogue -
Select Analogue Value Minimum
‘T’ Mode is available by pressing the Test key once. It is exited by
pressing the Test key twice, or by pressing the TV key, or by switch-
ing the set into standby.
The functions described below are available by pressing the indicated
key :
pressing the Test key twice, or by pressing the TV key, or by switch-
ing the set into standby.
The functions described below are available by pressing the indicated
key :
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