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4-3-10 RF AGC Adjustment
1. Connect a pattern generator (PM5418) RF signal to tuner RF.
2. Select a gray scale pattern and PAL-B/G system.
Set to 479.25MHz.
3. Connect IC201 (ONECHIP) pin 53 to a digital multimeter.
4. Adjust AGC (using volume keys) in the Factory Service Mode.
Set IC201 (ONECHIP) pin 54 to 3.7 + 0.05v(DC).
5. Adjust AGC within 20 seconds after power ON.
4-3-11 Geometry Adjustment
(SC -> PVS -> PVA ->PSL -> PHS)
1. Input a Lion Head pattern.
2. SET the SC Data steps 10~12 in the Factory Mode.
3. Adjust with PVS (starts blinking) exactly at middle of the
screen.
4. Adjustment with PVA : Top and Bottom margins of the
picture are 4.
5. Adjustment with PSL : Bottom of picture to bottom of
screen.
6. Adjust PHS horizontally. Center the picture.
Samsung Electronics
4
4
Alignment and Adjustments
4-11
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