JVC AV-48P775/H Service Manual

Contents

(No.YA173)1-454.6.4 DEFLECTION & CONVERGENCE ADJUSTMENT• The adjustment using the remote control unit is made on the basis of the initial setting values.• The setting values which adjust the screen to the optimum condition can be different from the initial setting values.• At first the adjustment in FULL mode should be done, then the data for the other ASPECT mode is corrected in the respective valueat the same time.4.6.4.1 FLOWCHART OF ADJUSTMENTCAUTION:All adjustments of the DEFLECTION circuit for this model should be carried out under the status without convergence operation.To enter the mode without convergence operation, select 1.PICTURE/SOUND and change the data in the setting item F62 from 0to 1. (For details, please refer to the adjustment of DEFLECTION.)As a result, you can get the screen as shown in bellow figure. Adjust the DEFLECTION circuit in order of the steps indicated by thedownward arrows.NOTE:When every adjustment of the DEFLECTION circuit has completed, start the adjustment of convergence.PREPARATIONDEFLECTIONCONVERGENCEWithoutconvergenceoperationOverall position & sizeCenterCenter perimeter(If center deviated, readjust)Perimeter(If center deviated, readjust)Corner (Final adjust)R and B onlyCrosshatch Completed(From a collection of squares)H.POSITION/SIZE(coarse)RASTERCENTERINGV.POSITION/ SIZE/ LINEARITYCONVERGENCEPHASEOVERALLCONVERGENCE( LINE / POINT )AUTOCONVERGENCEPRESETSCREEN TILTH.SIZESIDE PINTRAPEZIUMH.POSITIONAdjustmentlocationsequence