Magnavox 19MDTR20 Service Manual

Also see for 19MDTR17: Features

Contents

1-6-5 T0006EA5. H fo AdjustmentPurpose: To get correct horizontal position and size ofscreen image.Symptom of Misadjustment: Horizontal position andsize of screen image may not be properly displayed.Note: R583 --- Sub CBA1. Connect frequency counter to R583.2. Operate the unit for at least 20 minutes.3. Enter the Service mode. (See page 1-6-1.) Press"2" button on the remote control unit and select H-ADJ mode.4. Press "CH o / p" buttons on the remote controlunit so that the display will change "0" to "7."5. At this moment, choose display "0" to "7" when thefrequency counter display is closest to15.734kHz±300Hz.6. Turn the power off and on again.6. Cut-off AdjustmentPurpose: To adjust the beam current of R, G, B, andscreen voltage.Symptom of Misadjustment: White color may bereddish, greenish or bluish.Notes: Screen Control --- FBT (Sub CBA), FBT= FlyBack Transformer,Use the Remote Control Unit.1. Degauss the CRT and allow the unit to operate for20 minutes before starting the alignment.2. Input the Black raster signal from RF input.3. Enter the Service mode. (See page 1-6-1.)4. Press the "VOL p" button.(Press "VOL p" then display will change CUT OFF/DRIVE and 7Fh adjustment).5. Choose CUT OFF/DRIVE mode then press "1" but-ton. This adjustment mode is CUT OFF (R).6. Increase the screen control so that the horizontalline just appears on the CRT.7. Press the "CH o / p" button until the horizontal linebecomes white.8. Choose CUT OFF/DRIVE mode then press "2" but-ton. This adjustment mode is CUT OFF (G). Press"CH o / p" until the horizontal line becomes white.9. Choose CUT OFF/DRIVE mode then press "3" but-ton. This adjustment mode is CUT OFF (B). Press"CH o / p" until the horizontal line becomes white.10.Turn the power off and on again.Test point Adj. Point Mode InputR583 CH o / pbuttons Video ---Tape M. EQ. Spec.--- Frequency Counter 15.734kHz±300HzTest point Adj. Point Mode Input---Screen-ControlCH o / pbuttonsRF Black RasterTape M. EQ. Spec.--- PatternGenerator See Reference Notes belowFigurePATTERN GENERATORRF INPUTFig. 5