Sony KV-28WF1A Service Manual ▷ View online
— 29 —
KV-28WF1
SUB BRIGHTNESS ADJUSTMENT
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
Nicam Prescale NIP
97
Time Nicam
31
Carrier mute CRM
OFF
Audio clock ACO
HIZ
Scart prescale
25
Scart volume
64
IC STATUS (CXA2000 / CXA2040)
CXA2000
H lock
1
IKR
1
VNG
0
X-RAY
0
Colour system
3
CV1 Sync
1
CXA2040
Sync sep
1
S1 mode pin
01
S2 mode pin
01
TUNER
Tuner status
01101011
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.
difference between the 0 IRE and 10 IRE signal.
SUB CONTRAST ADJUSTMENT
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 2.50 volts.
amplitude of 2.50 volts.
SUB COLOUR ADJUSTMENT
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 cyan, magenta and
blue colour bars are of equal height.
blue colour bars are of equal height.
TV STATUS
Text system
C TEXT/TV TEXT
Dolby
NO/YES
Text language set
WEST/EAST/RUSSIAN
Menu language set
WEST/EAST/RUSSIAN
Destination
B/D/U/K/L/E/A/R
Scart 16:9
OFF/ON
RGB priority
OFF/ON
Ageing
OFF/ON
Size
29/25
Colour trap sw
SECAM/ALL
Velocity mod
ON/OFF
AFT STATUS
WINDOW/HIGH/LOW
NOTE: The data shown in the TV STATUS table is
dependant on destination, screen size and country.
dependant on destination, screen size and country.
B-Out waveform
SAME LEVEL
KV-28WF1
— 30 —
V SIZE
V LIN
S CORRECTION
V CENTRE
H SHIFT
H SIZE
PIN AMP
TILT
CORNER PIN
V ANGLE
1.
Enter into the Geometry Adjustment Service Menu.
2.
Select and adjust each item in order to obtain the optimum
image.
image.
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
Adj
EHT H
Adj
Corner Pin
Adj
SYSTEM B/G, D/K, I & L I.F ADJUSTMENT
SYSTEM L BAND 1 I.F ADJUSTMENT
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 I.F adjustment service mode (i.e. " TT 59 " )
to fix the I.F frequency to 34.2 MHz.
to fix the I.F frequency to 34.2 MHz.
3.
Enter into the service mode and select "Current TVStatus".
4.
Adjust the RV02 until the "AFT Status" indicates
a " Window " condition.
a " Window " condition.
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 I.F adjustment service mode (i.e. " TT 59 " )
to fix the I.F frequency to 38.9 MHz.
to fix the I.F frequency to 38.9 MHz.
3.
Enter into the service mode and select "Current TVStatus".
4.
Adjust the I.F coil (LV01) until the "AFT Status" indicates
a " Window " condition.
a " Window " condition.
1.
Receive a signal of 63dBuV / 75 ohm terminated via the
tuner socket.
tuner socket.
2.
Measure the voltage at test point 1 (A board).
3.
Adjust RV01 to obtain a voltage of 3.0V ± 0.3V.
TUNER AGC ADJUSTMENT
- A Board component side -
TUNER / IF
A
TP1
LV01
RV01
RV02
— 31 —
KV-28WF1
Is available by pressing Test button twice, OSD " TT " appears. The functions described below are available
by pressing the two numbers. To release the Test mode 2, press 0 twice, or switch the TV into stand-by mode.
by pressing the two numbers. To release the Test mode 2, press 0 twice, or switch the TV into stand-by mode.
Note:
TT modes 40-49 require the TV to be in programme 59 before the command is accepted.
TT modes 40-49 require the TV to be in programme 59 before the command is accepted.
4-2. TEST MODE 2:
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KV-28WF1
— 32 —
These test modes can set the delay byte to any value 0-31
which creates a (value x 20) mS delay.
which creates a (value x 20) mS delay.
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Click on the first or last page to see other KV-28WF1A service manuals if exist.