BEKO BEKO chassis K5 free download

File name BEKO chassis K5.pdf

Service Manual K5 CHASSIS-DVD COMBO TV CONTENTS PAGE o Safety Instructions 2 o Technical Specifications 3 o Remote Control 4 o Preparations 7 o Operating Your TV 8 o Block Diagram 21 o IC Datasheets&Specs 22 o Pin Voltages of IC's 29 o Oscillosgraphs Of Some IC Pins 31 o Electrical Adjustments 35 o Channel Frequency Tables 38 o Spare Part List 41 1 1. SAFETY INSTRUCTIONS . GENERAL GUIDELINES exposed metallic part a return path to the 1. It is advised to insert an isolation transformer chassis the reading should be between in the AC supply before servicing a hot 4Mohm and the 20Mohm. When the exposed chassis. metal does not have a return path to the chassis, the reading must be infinite. 2. Potentials as high as 33KV are present when this receiver is in operation. Operation of the LEAKAGE CURRENT HOT CHECK receiver without the rear cover involves the 1. Plug the AC cord directly in to the AC outlet. danger of a shock hazard from the receiver Do not use an isolation transformer for this power supply. Servicing should not be check. attempted by any one who is not competent 2. Connect a 2Kohm 10W resistor in series with with the precautions necessary when working an exposed metallic part on the receiver and on the high voltage equipment. Always an earth, such as a water pipe. discharge the anode of the tube. 3. Use an AC voltmeter with high impedance to measure the potential across the resistor. 3. When servicing observe the original lead 4. Check each exposed metallic part and dress in the high voltage circuits. If a short check the voltage at the each point. circuit is found, replace all the parts which 5. Reverse the AC plug at the outlet and repeat have been overheated or damaged by the each of the above measurements. short circuit. 6. The potential at the any point should not exceed 1.4 Vrms. In case a measurement is 4. Always use the manufacturer'