Rolsen RL-20S10 Service Manual Final LT-20FxP(2) free download

File name Rolsen_RL-20S10 Service Manual Final LT-20FxP(2).pdf

COLOR TFT-LCD TV SERVICE MANUAL MODEL : RL-20S10 CAUTION !! BEFORE SERVICING THE TFT-LCD TV, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. RL-20S10 SERVICE MANUAL PAGE:1 CONTENTS Contents ------------------------------------------------------------------------ 2 Safety Precautions ---------------------------------------------------------- 3 Servicing Precautions ------------------------------------------------------ 4 Specifications ----------------------------------------------------------------- 5 Control Descriptions -------------------------------------------------------- 9 External In/Out Ports ------------------------------------------------------- 12 Adjustment -------------------------------------------------------------------- 13 Block Diagram ---------------------------------------------------------------- 17 Schematic Diagram --------------------------------------------------------- 18 Wave Form --------------------------------------------------------------------- 19 Troubleshooting -------------------------------------------------------------- 25 Replacement Parts List ---------------------------------------------------- 29 PCB Layout -------------------------------------------------------------------- 37 Exploded View ---------------------------------------------------------------- 43 RL-20S10 SERVICE MANUAL PAGE:2 SAFETY PRECAUTIONS !! Important Safety Notice !! Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet. Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug of the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS, which is, corresponds to 0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer. Leakage Current Hot Check circuit RL-20S10 SERVICE MANUAL PAGE:3 SERVICING PREC