LF-B20 - Television SONY - Free user manual and instructions
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| Product Type | Sony Television |
| Brand | Sony |
| Model | LF-B20 |
| Display Type | LCD |
| Screen Size | 20 inches (51 cm) diagonal |
| Resolution | 852 x 480 pixels (480p) |
| Aspect Ratio | 16:9 widescreen |
| Tuner | Analog: PAL/SECAM/NTSC |
| Audio Output | 2 x 5 W stereo speakers |
| Connectivity | RF antenna input, composite AV, S-Video, component, SCART |
| Remote Control | Infrared remote with menu and playback controls |
| Power Supply | AC 220-240 V, 50 Hz |
| Power Consumption | 60 W (0.5 W standby) |
| Dimensions (W x H x D) | 490 x 360 x 195 mm (with stand) |
| Weight | 4.8 kg |
| VESA Mount Pattern | 100 x 100 mm, M4 screws |
| Special Features | Auto channel tuning, sleep timer, child lock, last channel recall |
| Maintenance | Clean with soft dry cloth; no solvents or abrasive cleaners |
| Safety Compliance | Ventilation required; do not block openings; keep away from moisture |
| Spare Parts | Remote control (RM-ED001) and power cord available from Sony service centers |
| User Manual | 73 pages, includes setup instructions and troubleshooting tips |
Frequently Asked Questions - LF-B20 SONY
How do I connect the antenna to my Sony LF-B20 TV?
Connect the coaxial cable from your TV antenna or cable box to the RF input on the back of the TV. Then press the CH+ or CH- to tune channels, or use the auto scan option in the setup menu to find all available channels.
The TV won't turn on. What should I check?
First, make sure the power cord is firmly connected to the TV and the wall outlet. Try a different outlet to rule out electrical issues. Confirm that the standby light (if any) is on; if it's dim or off, the TV may not be receiving power. If the standby light is on but the TV does not respond, press the Power button on the TV itself, not the remote, and see if it starts.
How can I program the remote control for other devices?
Press and hold the Code Search button on the remote until the red LED blinks. Enter the three-digit code for your device (e.g., DVD, soundbar) from the code list provided in the manual. After entering the code, press Power – if the device turns on, the code is saved.
What picture mode should I use for movies?
For movies, select the Theatre or Home Cinema picture mode from the Picture menu. This mode reduces artificial sharpening and adjusts color and brightness to match a dimmer, cinematic environment. You can further fine-tune Backlight and Gama to your taste.
How do I set the sleep timer?
Press the MENU button on the remote, navigate to System or Display settings, and select Sleep Timer. Choose a countdown period (e.g., 15, 30, or 60 minutes) and confirm. The TV will automatically go into standby mode once the timer ends.
There is no sound from the TV. How to fix?
Check that the volume is not turned all the way down or muted. If you're using external speakers, verify the audio cables are connected to the correct jacks. Access the Audio Menu to confirm the TV's speakers are enabled. Also, try pressing the Mute button on the remote to unmute.
Can I mount the TV on a wall?
Yes, the LF-B20 supports VESA mounting (100 x 100 mm). Use a wall bracket that is compatible with the TV's weight (4.8 kg). Attach the bracket to a solid wall, then fix the TV using the included M4 screws. Always follow the safety instructions in the manual to prevent damage or injury.
How do I perform a factory reset?
Press MENU, go to Setup and select Factory Reset or Restore Defaults. You may need to enter a PIN code (default is 0000). Confirm the reset; the TV will restart and return to the original factory settings, erasing all custom settings and channel list.
Why is the picture distorted or unstable?
Distorted pictures are often caused by weak antenna signals or poor cable connections. Check that the RF cable is securely connected and the antenna is properly oriented. Try rescanning channels (in Tuning menu) and set the correct Aspect Ratio in the screen settings. Interference from other electronics may also affect the signal.
How do I clean the TV screen safely?
Turn off the TV and unplug it from the power outlet. Use a soft, dry microfiber cloth to gently wipe the screen in a circular motion. For stubborn dirt, slightly dampen the cloth with distilled water or an approved screen cleaner, but never spray liquid directly. Do not use alcohol, ammonia, or abrasive materials.
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USER MANUAL LF-B20 SONY
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Product information
Brand : SONY
Model : LF-B20
Category : Television