Magnavox 19MDTR20 Service Manual

Also see for 19MDTR17: Features

Contents

1-2-4 T1102_ISPSafety Check after ServicingExamine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts andwires have been returned to original positions. Afterwards, perform the following tests and confirm the specifiedvalues in order to verify compliance with safety standards.1. Clearance DistanceWhen replacing primary circuit components, confirmspecified clearance distance (d) and (d') betweensoldered terminals, and between terminals andsurrounding metallic parts. (See Fig. 1)Table 1: Ratings for selected areaNote: This table is unofficial and for reference only. Besure to confirm the precise values.2. Leakage Current TestConfirm the specified (or lower) leakage currentbetween B (earth ground, power cord plug prongs) andexternally exposed accessible parts (RF terminals,antenna terminals, video and audio input and outputterminals, microphone jacks, earphone jacks, etc.).Measuring Method: (Power ON)Insert load Z between B (earth ground, power cord plugprongs) and exposed accessible parts. Use an ACvoltmeter to measure across both terminals of load Z.See Fig. 2 and following table.Table 2: Leakage current ratings for selected areasNote: This table is unofficial and for reference only. Be sure to confirm the precise values.AC Line Voltage Region ClearanceDistance (d), (d’)110 to 130 V U.S.A. orCanada≥ 3.2 mm(0.126 inches)AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:110 to 130 V U.S.A. orCanada0.15 μF CAP. & 1.5 kΩRES. Connected in parallel i ≤ 0.5 mA rms Exposed accessiblepartsChassis or Secondary Conductordd'Primary Circuit TerminalsFig. 1AC Voltmeter(High Impedance)Exposed Accessible PartB Earth GroundPower Cord Plug ProngsZFig. 2