TC-L42S20BL CONTENTS 1 Safety Precautions ................3 8 Measurements and Adjustments ............24 1.1. General Guidelines ................3 8.1. Voltage chart of A-board ..............24 1.1.1. Leakage Current Cold Check ............3 8.2. Voltage chart of P-board ..............24 1.1.2. Leakage Current Hot Check (See Figure1.) ........3 9 Block Diagram ..................
TC-L42S20BL 1 Safety Precautions 1.1. General Guidelines 1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
TC-L42S20BL 2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor [chip] components.
TC-L42S20BL 2.2. About lead free solder (PbF) Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
TC-L42S20BL 3 Service Navigation 3.1. Service Hint Board Main Device A BOARD AVSW, TUN, OFDM, ADV, P-AVC, GENX, EEP, TEMP P BOARD Power Supply V BOARD Remote, LED, Luminunce Sensor K BOARD KEY, Power SW TC BOARD T-CON Board...
TC-L42S20BL 4 Specifications TC-L42S20A / TC-L42S20P / TC-L42S20BL 110-220 V ~ 50/60 Hz Alimentación 193 W Promedio 0,4 W Condición en espera 16:9 Aspecto 106 cm (diagonal) Tamaño visible de la pantalla 930 mm (L) × 523 mm (A) 2.073.600 (1.980 (L) × 1.080 (A) Número de pixels...
TC-L42S20BL 5 Service Mode 5.1. How to enter into Service Mode While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds. Contents of adjustment mode 5.1.1. • Value is shown as a hexadecimal number.
TC-L42S20BL 5.2. SRV-TOOL 5.2.1. How to access 1. Select [SRV-TOOL] in Service Mode. 2. Press [OK] button on the remote control. 5.2.2. Display of SOS History SOS History (Number of LED blinking ) indication. From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
TC-L42S20BL 5.3. Service Mode Adjustment Set timer to 30min, press the ‘RECALL’ button on the remote control and press ‘-’ vol button on the LCD panel. • Press button R and G for adjustment. 5.3.1. Self Check Mode 1. Press the ‘MENU’ button (on the remote control) and the ‘DOWN’ button on the LCD panel.
TC-L42S20BL 6 Troubleshooting Guide Use the self-check function to test the unit. 1. Checking the IIC bus lines 2. Power LED Blinking timing 6.1. Check of the IIC bus lines 6.1.1. How to access Self-check indication only: Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
TC-L42S20BL 6.2. Power LED Blinking timing chart 1. Subject Information of LED Flashing timing chart. 2. Contents When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:...
TC-L42S20BL 7 Disassembly and Assembly Instructions 7.1. AC Cord Dressing 1. Clamp plug with clamper. 2. Insert beads 3 pcs. And slide down to lower hole.
TC-L42S20BL 7.2. AC Cord Installation 1. Put on the AC CORD BRACKET on the CABINET. 2. Fix the AC CORD BRACKET with SCREW. 3. Insert AC CORD connector into P-PCB connector. 4. Clamp the AC CORD. 5. Insert AC CORD bushing into the AC CORD BRACKET.
TC-L42S20BL 7.3. Control Panel Assembly & Clamper Installation 1. Put control panel Assy on the cabinet. 2. Fix the control panel with screws. Fix clamper at bottom mtg.
TC-L42S20BL 7.4. Side AV Preparation & Installation 1. Stick the side av indi. Sheet and felt on the side av bracket. 2. Insert the SIDE AV BRACKET from the side position of the A-PCB. 3. Fix the SCREW with A-PB-MTG METAL.
TC-L42S20BL 7.5. Speaker Preparation & Installation 1. Stick the SP sponge. 2. SP bracket put on cabinet. 3. Fix them with screws. 4. Insert the SP rubber bush into the SP unit. 5. Stick sponge at speaker. 6. Insert the SP unit to SP bracket.
TC-L42S20BL 7.6. LCD Panel Assembly Installation 1. Stick barrier at LCD Panel. 2. Stick Heat Rubber at Barrier. 3. Screw inverter board at LCD panel. 4. Slot mini LVDS wire at LCD panel board and inverter board. 5. Put LCD panel on the cabinet.
TC-L42S20BL 7.7. LED Panel Installation 1. Fix LED PANEL on CABINET. 2. Wire connecting. (V10). 3. Put V-PCB on CABINET. 4. Fix them with SCREW. 5. Insert the CLAMPER. 6. Stick felt at A10-V10 wire.
TC-L42S20BL 7.8. Felt Sticking at LVDS Wire 1. Insert CN1~P4 wire to inverter. 2. Insert CN201~P3 wire to inverter and stick felt. 3. Stick felt at LCD panel (Bottom left side). 4. Fix Top mtg and Bottom Mtg. 5. Fix Chassis frame bracket at Top Mtg and Bottom Mtg.
TC-L42S20BL 7.9. LCD Bracket and MTG Installation 1. Fix MASK BRACKET (SIDE/TOP/BTM) on the cabinet. 2. Fix Vertical Metal Bracket, Metal Support Bracket (R). 3. Fix them with SCREW. 4. Fix Clamper at Vertical Metal Bracket.
TC-L42S20BL 7.10. Pedestal Assembly 1. Fix stand mtg spacer at pedestal cover. 2. Stick felt at front base plate. 3. Fix base plate at stand mtg and pedestal cover and screw. 4. Stick rubber foot at rotation plate. 5. Apply grease at rotation plate and bush (pede).
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TC-L42S20BL Put Pedestal Assembly into polybag and fold properly.
TC-L42S20BL 8 Measurements and Adjustments 8.1. Voltage chart of A-board Set IP-Board to a dummy set and check the satisfaction with the specified voltage as following table. Power Supply Name Measurement Point Specification (V) SUB1.8V TP5601 1.74 - 1.90 SUB1.2V TP5600 1.18 - 1.32...
TC-L42S20BL 13 Exploded View and Replacement Parts List 13.1. Exploded View and Mechanical Replacement Parts List Please click the radio button for ‘Diagrams ll/Parts List’ on the menu bar. 13.2. Electrical Replacement Parts List 13.2.1. Replacement Parts List Notes...
TC-L42S20BL 13.2.2. Mechanical Parts Location TV/AV SUB MENU R-TUNE SLEEP 13.2.3. Mechanical Replacement Parts List 13.2.4. Assembled Boards REF. NO. PART NO. PART NAME & DESCRIPTION REF. NO. PART NO. PART NAME & DESCRIPTION L0AA14B00006 FULL RANGE SPEAKER 10W 8Ω...