Magnavox 19MDTR20 Service Manual

Also see for 19MDTR17: Features

Contents

1-4-2 TD857EA2. H 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 --- H.V. CBA1. Connect frequency counter to R583.2. Operate the unit for at least 20 minutes.3. Enter the Service mode. (See page 1-4-1.) Press"2" button on the service remote control unit andselect H-ADJ mode.4. Press "CH o / p" buttons on the service remotecontrol unit so that the display will change "0" to"7." At this moment, choose display "0" to "7" whenthe frequency counter display is closest to15.734kHz±300Hz.5. Turn the power off and on again.3. C-Trap AdjustmentPurpose: To get minimum leakage of the color signalcarrier.Symptom of Misadjustment: If C-Trap Adjustment isincorrect, stripes will appear on the screen.Note: D1304 (Cathode) (B-Out)--- Main CBA1. Connect Oscilloscope to D1304 (Cathode).2. Input a color bar signal from RF input.Enter the Service mode. (See page 1-4-1.)3. Press "0" button on the service remote control unitand select C-TRAP Mode.4. Press CH o / p buttons on the service remotecontrol unit so that the carrier leakage B-Out(3.58MHz) value becomes minimum on the oscillo-scope.5. Turn the power off and on again.4. V. Size AdjustmentPurpose: To obtain correct vertical height of screenimage.Symptom of Misadjustment: If V. Size is incorrect,vertical height of image on the screen may not beproperly displayed.1. Enter the Service mode. (See page 1-4-1.)Press "9" button on the service remote control unitand select V-S mode. (Press "9" button then dis-play will change to V-P and V-S).2. Input monoscope pattern.3. Press "CH o / p" buttons on the service remotecontrol unit so that the monoscope pattern is90±5% of display size and the circle is round.Test Point Adj. Point ModeR583 CH o / p buttons VideoM. EQ. Spec.Frequency Counter 15.734kHz±300HzTest Point Adj. Point InputD1304(Cathode)(B-OUT)CH o / pbuttons Color BarM. EQ.Oscilloscope,Pattern GeneratorFigureminimumFig. 2Adj. Point InputCH o / p buttons MonoscopeM. EQ. Spec.Pattern Generator 90±5%