Samsung PS43D450A2W Service Manual

Also see for PS43D450A2W: E-manual User manual

Contents

1. Precaution1. PrecautionTo avoid possible damage, electric shocks or exposure to radiation, follow the instructions below with regard to safety,installation, service and ESD.1.1. Safety Precautions1) Make sure all protective devices are properly installed including non-metallic handles and compartment covers wheninstalling or re-installing the chassis or chassis assemblies.2) Make sure that no gaps exist between the cabinets for children to insert their fingers in to prevent children fromreceiving electric shocks. Gaps mentioned above include ventilation holes of a too great magnitude between the PDPmodule and the cabinet mask, and the improper installation of the rear cabinet.Errors may occur when the resistance is below 1.0MΩ or over 5.2MΩ. In these cases, make sure that the device isrepaired before sending it back to the customer.3) Check for Electricity Leakage (AC Leakage Test)WARNINGDo not use an insulated transformer for checking the leakage. Use only those current leakage testers or mirroringsystems that comply with ANSIC 101.1 and the Underwriter Laboratory’s specifications (UL1410, 59.7).DEVICEUNDERTESTLEAKAGECURREN TTESTERTES T ALLEXPOSED ME TALSUR FACES2-WIRE CORDALSO TES T WITHPLUG REVERSED(US ING ACADAPTER PLUGAS REQU IRED)EARTHGROUND( R E A D I N GSHOULD NOT BEABOVE 0.5mA)Figure 1.1 AC Leakage Test4) A high voltage is maintained within the specified limits using safety parts, calibration and tolerances. When voltageexceeds the specified limits, check each special part.5) Warning for Engineering Changes:Never make any changes or additions to the circuit design or the internal part for this product.Ex: Do not add any audio or video accessory connectors. This might cause physical damage.Furthermore, any changes or additions to the original design/engineering will invalidate the warranty.6) Warning - Hot Chassis:Some TV chassis are directly connected to one end of the AC power cord for electrical reasons. Without insulatedtransformers, the product can only be repaired safely when the chassis is connected to the earthed end of the ACpower source.To make sure the AC power cord is properly connected, follow the instructions below. Use the voltmeter to measure thevoltage between the chassis and the earthed ground. If the measurement is over 1.0V, unplug the AC power cord andchange the polarity before reinserting it. Measure the voltage between the chassis and the ground again.Copyright© 1995-2011 SAMSUNG. All rights reserved. 1-1www.freeservicemanuals.info8/6/2016Published in Heiloo Holland