Parts/Service for KV-HF21M80

Parts/Service for KV-HF21M80

Brand: SONY

Category: TV

Document Type: Parts/Service

Language: EN

Uploaded: Nov. 21, 2025, 8 p.m.

Manual Publish Date: 1999-10-01

Warranty Information

No specific warranty information is provided in the manual.

Using Your New TV

Getting Started

Step 1: Connect the antenna

Connect the antenna cable to the "ANTENNA" or "RF IN" terminal on the rear of the TV. If you wish to connect a VCR, follow the "Connecting a VCR" diagram.

Connecting a VCR

Connect the antenna cable from the VCR to the TV's antenna input. Connect the video and audio output from the VCR to the TV's video and audio input jacks. Press the "VIDEO" button to watch the VCR.

Connecting optional components

You can connect other components like a VCR, multi-disc player, camcorder, video game, or stereo system using the input/output jacks.

Connecting a camcorder/video game equipment

Use the video input jacks (usually on the front of the TV) to connect these devices. Audio/Video cables are typically required.

Securing the TV

To prevent the TV from falling, use the supplied screws to attach the band to the TV stand and rear of the TV, or use a cord/chain to secure it to a wall or pillar.

Presetting channels

Automatically: Turn on the TV, then press "AUTO PROGR." The TV will scan and preset channels.

Manually: Press SELECT until "MANUAL PROGRAM" appears, then use PROGR +/- or number buttons to select the channel and press SELECT.

Watching the TV

Turn on the TV using the power button. Use the PROGR +/- or number buttons to select a channel. Adjust volume with the +/- buttons.

Additional Tasks

Includes functions like temporary power off, mute, input selection, jump to previous channel, on-screen information display, automatic volume adjustment, and picture position adjustment.

Changing the on-screen display language

Press SELECT until the language option appears, then use +/- to select the desired language.

Setting the Wake Up timer

Press the timer button until the desired time appears. Select the TV program or video mode you want to display. Set the Sleep timer if desired.

Customizing the picture and sound

Picture/Sound Modes: Press PIC MODE or SOUND MODE repeatedly to select desired presets.

Adjusting Settings: Use SELECT to choose a setting (e.g., Picture, Color, Brightness) and +/- to adjust the level.

Surround Mode: Select "SURROUND" and use +/- to choose MOVIE, MUSIC, or OFF.

Viewing your favorite channels

Press FAVORITE, then use number buttons 1-6 to select a pre-set favorite channel. To change settings, press SELECT until "FAVORITE CH SET UP" appears.

Blocking the channels (CHILD LOCK)

Select a channel, press SELECT until "CHILD LOCK" appears, then use +/- to toggle ON/OFF. A symbol indicates a locked channel.

Troubleshooting

Guides users through common issues like snowy picture, noisy sound, distorted picture, and no picture, offering solutions and possible causes.

Self-diagnosis function

The indicator light flashes to indicate possible causes of a problem. Count the flashes and inform the service center.

Troubleshooting and error codes

TROUBLESHOOTING
Symptom Solutions Possible cause
Snowy picture Check the antenna cable and connection.
Press SELECT until "MANUAL PROGRAM" appears and preset the channel.
Check the antenna type (VHF/UHF).
Adjust the antenna direction.
Try using a booster.		 Connection is loose or the cable is damaged.
Channel presetting is inappropriate or incomplete.
The antenna type is inappropriate.
The antenna direction is inappropriate.
Signal transmission is too low.
Noisy sound If the sound of some channels are noisy, select the channel, then select the appropriate TV system ("TV SYS"). The TV system setting is inappropriate.
Distorted picture Turn off or disconnect the booster if it is in use. Broadcast signals are too strong.
Good picture, Noisy sound
  • Press + to increase the volume level.
  • Press to cancel the muting.
  • The volume level is too low.
  • The sound is muted.
No sound
  • Do not use a hair dryer or other equipment near the TV.
  • Adjust the antenna direction for minimum interference.
  • Use a highly directional antenna.
  • Use the fine tuning (FINE) function.
  • Adjust the antenna direction.
  • Turn off or disconnect the booster if it is in use.
  • There is local interference from cars, neon signs, etc.
  • Broadcast signals are reflected by nearby mountains or buildings.
  • The antenna direction is inappropriate.
  • Use of a booster is inappropriate.
No color
  • Press SELECT until "COLOR" appears, then press +/- to adjust the color level.
  • Press SELECT until "COL SYS" appears, then check the color system setting (usually set to "AUTO").
  • Adjust the antenna direction.
  • Keep external speakers or other electrical equipment away from the TV.
  • Do not move the TV while it is turned on. Press (main power) to turn off the TV, wait five seconds, then turn it on again.
  • The color level setting is too low.
  • The color system setting is inappropriate.
  • The antenna direction is inappropriate.
  • Magnetic disturbance from external speakers or equipment, or the earth's magnetic field may affect the TV.
Abnormal color patches
  • Use the fine tuning (FINE) function.
  • There is interference from external sources, e.g., heavy machinery, nearby broadcast station.
Lines moving across the TV screen
  • Contact your nearest Sony service center.
  • Your TV may need service.
The indicator on your TV flashes red a number of times between 3-second intervals.
  • Check that the indicator flashes red.
  • Count the number of times the indicator flashes.
  • Press (main power) to turn off your TV.
  • Inform your nearest Sony service center about the number of times the indicator flashes.
  • Note the model name and serial number.
  • Indicates a problem with the TV. The number of flashes indicates the possible cause.
TV cabinet creaks.
  • The TV's demagnetizing function is working. This does not indicate a malfunction.
  • Changes in room temperature sometimes make the TV cabinet expand or contract, making a noise. This does not indicate a malfunction.
A "boom" sound is heard when the TV is turned on.
  • The TV's demagnetizing function is working. This does not indicate a malfunction.
  • The TV's demagnetizing function is working. This does not indicate a malfunction.
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