Sony Trinitron PVM-8041Q - Circuit Adjustments; D Board Adjustments; Horizontal Oscillation Frequency Adjustment (RV503); Screen Phase Adjustments (RV502, RV512, RV516)

PVM-8041Q/8044Q
SECTION 5
CIRCUIT ADJUSTMENTS
5-1. D BOARD ADJUSTMENTS
—D BOARD (COMPONENT SIDE)—
HORIZONTAL OSCILLATION FREQUENCY ADJUSTMENT
(RV503)
1. Receive a monoscope signal.
2. Connect pin-© of IC502 to ground with 100p.F/16V electrolytic
capacitor.
3. Adjust RV503 (H.FREQ) so that the screen streaming to stops.
mim
fo:low foioptimum foihigh
SCREEN PHASE ADJUSTMENTS (RV502, RV512, RV516)
1. Receive a monoscope signal.
2. Set U/S (Under Scan) switch to Under mode.
3. • CONTRAST.Minimum
♦ BRIGHTNESS.Maximum.
4. Adjust RV512 (U/H. SIZE) so that the white frame of monoscope
signal becomes visible.
5. AdjustRV516(H.BLK)forminimumBLKGwidth sothatallthe
deflection area becomes visible.
6. Adjust RV502 (VIDEO PHASE) so that the monoscope’s white
frames should have equal width.
white frame
White frame becomes
just to the right side.
A=B
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