Sharp 21SFX10L Service Manual - Page 16

21S-FX10L HORIZONTAL ,VERTICAL,DEFLECTION LOOP ADJUSTMENT (1) NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE 1 V-SHIFT (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V07. (3) Adjust V07 to align the center of the screen to the geometric center of CRT. Note: B line (Monoscope middle line) must same or nearest higher position to the A mark (Tube middle mark),refer to the attach drawing. 2 V-SIZE (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V10. (to be done after V-shift adj) (3) Adjust V10 bus data until the overscan become 10 ± 2.5 %. Caution 1: Pls aging TV more than 10 minutes before adjustment 3 V-LINEARITY (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V29. (3 )Already preset. (Adjust this unless the linearity is achieved.) 4 VS CORRECTION (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V27. (3 )Already preset. (Adjust this unless the linearity is achieved.) 5 H-SHIFT (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V08. (3) Adjust the V08 bus data to have a balance position to spec of A=B (as attach drawing). (4) If cannot make it to A=B, adjust from the best point so that A slightly smaller than B. 6 H-SIZE (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V35 (3) Adjust V35 bus data until the overscan becomes 10 ± 2.5 %. 7 PARABOLA (1) Receive CrossHatch Pattern Signal (NTSC 60 Hz). (I2C BUS CONTROL) (2) Choose the service data V31 Adjust the 2nd vertical line from the right end of the crosshatch pattern so that the middle 4 blocks are straight. (3) Make sure both left / right of 2nd vertical line at optimum point WAVEFORM OR OTHERS Figure A B OK OK NG A B 5 - 4