
Do you have a question about the LG RF-21FA20 and is the answer not in the manual?
Key safety-related characteristics and replacement guidelines.
Guidelines for safe servicing, handling components and picture tubes.
Explains X-RAY radiation source and protection measures.
Procedures for checking AC leakage current for safety.
Covers video input systems, IF, tuning ranges, and systems.
Details sound output, OSD, voice coil impedance, and features.
Describes external connections and input/output signal levels.
Details POWER, MUTE, ARC, TV/AV, EYE, TURBO buttons.
Explains program/menu selection, volume, and OK button.
Covers Status Memory and VCR buttons.
Details I/II, LIST, PIP, MENU, SWAP, SLEEP, and colored buttons.
Instructions for installing batteries in the remote control handset.
Describes the main power switch and standby indicator light.
Explains functions of front panel buttons and external sockets.
Explains the 'Eye' function for picture adjustment.
Notes on using isolation transformers and handling components.
Steps for removing the back cabinet and speakers.
Procedures for CPT removal and safe handling of the picture tube.
Safety guidelines and required test equipment for adjustments.
Procedures for RF AGC and screen voltage adjustments.
Steps for focus adjustment and deflection data setup.
Adjustments for EW, EP, EC, ET parameters.
Reference data for various adjustment parameters.
Steps for adjusting white balance for color accuracy.
Settings for OPTION 1 (YUV/W, GAME, etc.) and OPTION 2 (SCART, AV2, etc.).
Settings for OPTION 3 (200PR, CH+AU, etc.).
Troubleshooting flowchart for no power when SMPS is working or not.
Troubleshooting steps for issues with vertical deflection.
Troubleshooting for heater element, screen, and waveform anomalies.
Steps for diagnosing and fixing barrel distortion.
Flowchart for troubleshooting sound issues when picture is normal.
Troubleshooting for sound problems specific to the headphone jack.
Troubleshooting flowchart for problems catching channels.
Steps for diagnosing issues with the PIP feature.
Visual representation of parts assembly for the 21FA20 model.
List of parts with location numbers, part numbers, and descriptions.
Visual representation of parts assembly for the 21Q20 model.
Detailed list of parts for the 21Q20 model with location and part numbers.
List of replacement IC parts with part numbers and descriptions.
List of replacement diode parts with part numbers and descriptions.
List of replacement transistor parts with part numbers and descriptions.
List of replacement capacitor parts with part numbers and descriptions.
List of replacement capacitor parts with part numbers and descriptions.
List of replacement connector parts with part numbers and descriptions.
List of replacement transistor parts with part numbers and descriptions.
List of replacement core, coil, and fuse parts.
List of replacement resistor parts with part numbers and descriptions.
List of replacement resistor parts with part numbers and descriptions.
List of replacement resistor parts with part numbers and descriptions.
List of replacement resistor parts with part numbers and descriptions.
Lists spark gaps, switches, and filters.
Lists accessories like manuals and remote controllers.
Detailed schematic diagram of the MC-014A chassis.
Shows the layout of components on the main PCB.
High-level functional block diagram of the TV system.
Contains specific service data for the model.
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