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Need help?Do you have a question about the LG EC970W and is the answer not in the manual?
List of abbreviations used in the service manual for easy reference.
Guidelines for safe servicing, emphasizing warnings and critical parts.
Test to confirm specified insulation resistance between parts.
Test to confirm specified dielectric strength between parts.
Check specified clearance distance between terminals and parts.
Test to confirm specified or lower leakage current.
Procedures for servicing the unit, including disassembly and re-assembly.
Step-by-step guide for disassembling the unit.
Step-by-step guide for re-assembling the unit.
Diagram showing exploded parts of the cabinet and main frame.
Diagram showing exploded parts of packing and accessories.
Diagram showing the arrangement of electrical adjustment points.
Detailed procedure for servo adjustment.
Procedure for Phase Generator (PG) adjustment.
Waveform diagrams for electrical adjustments.
Troubleshooting guide for power supply unit issues.
Troubleshooting steps for no 12VA in capstan operation.
Troubleshooting steps for no 12V in Hi-Fi or buffer.
Troubleshooting steps for no 5V supply.
Troubleshooting guide for servo circuit issues.
Troubleshooting steps when the drum motor stops.
Troubleshooting steps when the capstan motor stops.
Troubleshooting for system and front panel circuits.
Troubleshooting steps for auto stop function.
Troubleshooting steps for unstable cassette loading.
Troubleshooting steps for non-functional buttons.
Troubleshooting steps when LED displays do not work.
Troubleshooting steps for no video signal in EE mode.
Troubleshooting steps for missing luminance signal in PB mode.
Troubleshooting steps for missing color signal in PB mode.
Troubleshooting steps for missing video signal in REC mode.
Troubleshooting steps for no picture on the TV screen.
Troubleshooting steps for no sound in mono mode.
Troubleshooting steps for no sound in Hi-Fi mode.
Troubleshooting steps for Hi-Fi playback issues.
Troubleshooting steps for Hi-Fi recording issues.
Schematic diagram of the power supply block.
Schematic diagram for Tuner, IF, NICAM and A2.
Schematic diagram of the Y/C processing block.
Schematic diagram of the Hi-Fi audio block.
Schematic diagram of the overall system.
Detailed circuit diagram for the power supply.
Detailed circuit diagram for Tuner, NICAM, and A2.
Detailed circuit diagram for Audio/Video processing.
Detailed circuit diagram for the system control.
Detailed circuit diagram for the Hi-Fi audio section.
Oscilloscope waveform examples for IC301.
Photographs of typical waveforms for IC501.
Layout diagram of the main printed circuit board.
Layout diagram of the left key printed circuit board.
Diagram showing part locations on the top view of the deck mechanism.
Diagram showing part locations on the bottom view of the deck mechanism.
Procedure to disassemble the drum assembly.
Procedure to disassemble the drum motor.
Procedure to disassemble the plate top.
Procedure to disassemble the CST holder assembly.
Procedure to disassemble the opener door.
Procedure to disassemble the L/D motor bracket.
Procedure to disassemble the rack and pinion gear assembly.
Procedure to disassemble the arm assembly F/L.
Procedure to disassemble the lever assembly S/W.
Procedure to disassemble the arm assembly cleaner.
Procedure to disassemble the head F/E.
Procedure to disassemble the base assembly A/C head.
Procedure to disassemble the arm assembly tension.
Procedure to disassemble the brake assembly T.
Procedure to disassemble the brake assembly RS.
Procedure to disassemble Reel S and Reel T.
Procedure to disassemble base assembly P4.
Procedure to disassemble the opener lid.
Procedure to disassemble the arm assembly pinch.
Procedure to disassemble lever and arm T/up.
Procedure to disassemble belt and motor capstan.
Procedure to disassemble the lever F/R.
Procedure to disassemble clutch assembly D35.
Procedure to disassemble brake assembly capstan.
Procedure to disassemble gear drive and gear cam.
Procedure to disassemble the gear sector.
Procedure to disassemble the plate slider.
Procedure to disassemble the lever tension.
Procedure to disassemble the lever spring.
Procedure to disassemble gear assemblies P2 and P3.
Procedure to disassemble base assemblies P2 and P3.
Procedure to disassemble the base loading mechanism.
Procedure to disassemble the base tension mechanism.
Procedure to disassemble the arm assembly idler jog.
List of tools and fixtures required for mechanism adjustment.
Check mechanism alignment and mode switch position.
Steps to prepare the deck mechanism for adjustment.
Procedure to check tape transport torque.
Procedure to adjust the height of the guide roller.
Initial adjustment for guide roller height.
Detailed adjustment for guide roller height.
Procedure to adjust the A/C head for accurate alignment.
Initial adjustment for A/C head height and tilt.
Check tape path smoothness between guides and roller.
Detailed adjustment for A/C head azimuth.
Procedure to adjust X-value for VCR compatibility.
Adjustments needed after replacing drum assembly.
Check tape travel after reassembling the deck.
Check audio and RF locking time during playback.
Check for tape curling or jamming issues.
Initial checks and cleaning before starting repairs.
Details on precision component maintenance.
Guidelines for periodic inspection and maintenance.
List of necessary supplies for maintenance.
Procedure for cleaning video heads and tape path.
Procedure for applying grease to mechanism parts.
Troubleshooting steps for general deck mechanism issues.
Troubleshooting steps when auto rewind fails.
Troubleshooting steps when forward/rewind modes fail.
Troubleshooting steps for auto stop function.
Troubleshooting steps when cassette fails to load.
Troubleshooting for tape presence not sensed in PB mode.
Troubleshooting steps when a cassette cannot be inserted.
Troubleshooting steps when the cassette will not eject.
Troubleshooting steps when the cassette fails to load.
Exploded view of the front loading mechanism.
Exploded view of the moving mechanism, part 1.
Exploded view of the moving mechanism, part 2.
General
