Sony KV-25F3A Service Manual page 30

KV-25F3
SYSTEM B/G, D/K, I & L I.F ADJUSTMENT
1. Input an off air signal of between 60-100dBuV / 75 ohm
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.
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.
SYSTEM L BAND 1 I.F ADJUSTMENT
1. Input an off air signal of between 60-100dBuV / 75 ohm
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.
3. Enter into the service mode and select "Current TVStatus".
4. Adjust the RV02 until the "AFT Status" indicates
a " Window " condition.
TUNER AGC ADJUSTMENT
1. Receive a signal of 63dBuV / 75 ohm terminated via the
tuner socket.
2. Measure the voltage at test point 1 (A board).
3. Adjust RV01 to obtain a voltage of 3.0V ± 0.3V.
- A Board component side -
RV01
RV02 LV01
TP1
A
TUNER / IF
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DEFLECTION SYSTEM ADJUSTMENT
1. Enter into the Geometry Adjustment Service Menu.
2. Select and adjust each item in order to obtain the optimum
image.
GEOMETRY ADJUSTMENT
V Size
V Position
S Correction
V Linearity
H Size
H Position
Pin Amp
Pin Phase
AFC Bow
AFC Angle
EHT V
EHT H
Corner Pin
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
V SIZE
V LIN
S CORRECTION
V CENTRE
H SHIFT
H SIZE
PIN AMP
TILT
CORNER PIN
V ANGLE