Sony KV-HF21M80 service manual Self-diagnosis function, Troubleshooting

Page 16

Additional Information

Self-diagnosis function

Your TV is equipped with a self-diagnosis function. If there is a problem with your TV, the u indicator flashes red. The number of

KV-HF21M80

RM-952

Troubleshooting

 

If you find any problem while viewing your TV, please check the following guide. If

any problem persists, contact your Sony dealer.

 

Symptom

Solutions

Possible cause

times the u indicator flashes indicates the possible causes.

Snowy picture

•

Check the antenna cable and connection

• Connection is loose or the

 

on the TV, VCR and on the wall. (page 4)

cable is damaged.

Front of TV

Noisy sound

•Press SELECT until “MANUAL PROGRAM” appears on the screen then preset the channel again. (page 10)

•Check the antenna type (VHF/UHF). Contact a Sony dealer for advice.

•Adjust the antenna direction. Contact a Sony dealer for advice.

•Try using a booster.

•Channel presetting is inappropriate or incomplete.

•The antenna type is inappropriate.

•The antenna direction is inappropriate.

•Signal transmission is low.

– 16 –

u indicator

1

Check that the u indicator flashes red a number of times between 3-second

 

 

intervals.

2

Count the number of times the u indicator flashes.

 

3

Press U (main power) to turn off your TV.

 

4

AdditionalInformation

 

Inform your nearest Sony service center about the number of times the

 

u indicator flashes.

 

Be sure to note the model name and serial number located on the rear of

 

your TV.

Distorted picture

• Turn off or disconnect the booster if it is

• Broadcast signals are too

 

in use.

strong.

Noisy sound

 

 

Good picture

• If the sound of some channels are noisy,

• The TV system setting is

 

 

select the channel, then select the

inappropriate.

 

appropriate TV system (“TV SYS”).

 

 

(page 10)

 

Noisy sound

 

 

No picture

• Check the power cord, antenna and the

• The power cord, antenna

 

 

VCR connections.

or VCR is not connected.

 

• Press u (power).

• The TV is not turned on.

 

• Press U (main power) on the TV to turn

 

No sound

off the TV for about five seconds, then

 

turn it on again.

 

 

 

Additional Information

19

20

Additional Information

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Contents Trinitron Color TV Specifications KV-HF21M80Table of Contents DiagramsDisassembly SET-UP AdjustmentsSelf Diagnostic Function Diagnostic Test IndicatorsDisplay of STANDBY/TIMER Light Flash Count Stopping the STANDBY/TIMER FlashSELF-DIAGNOSTIC Screen Display Handling of SELF-DIAGNOSTIC Screen DisplaySELF-DIAGNOSTIC Circuit +B overcurrent ªOCPºGetting Started Connect the antennaConnecting the 3D Woofer Preset the channels automaticallyInsert the batteries into the remote Terminals at the rear of your TVConnecting optional components Connecting a camcorder/video game equipmentUsing the … video input jacks Connecting audio/video equipment using the ÚPresetting channels manually Presetting channelsPresetting channels automatically Watching the TV Skipping program numbersSetting the Sleep timer Setting the Wake Up timerChanging the on-screen display language Adjusting the picture and sound settings Selecting the surround modeCustomizing the picture and sound Selecting the picture and sound modesChanging the favorite channel setting Viewing your favorite channelsBlocking the channels Child Lock Selecting a favorite channelTroubleshooting Self-diagnosis functionTroubleshooting Remote Control Identifying parts and controlsService Position Note Remove F Bracket first Rear Cover RemovalChassis Assy Removal Bracket RemovalTerminal Bracket Removal Replacement of PartsDegauss Coil Removal Removal of ANODE-CAP Removing Procedures Picture Tube RemovalSection SET-UP Adjustments Beam LandingConvergence Horizontal and Vertical Static ConvergenceYCH TLV Focus Adjustment G2 Screen and White Balance AdjustmentsAdjustments with Commander Entering Service ModeAdjustment Method Adjustment Item Table INF INS TXT OPM OPB KV-HF21M80 Item InformationPicture Quality Adjustments SUB Color Adjustment SUB HUE AdjustmentBell Filter Adjustment Board Adjustment After IC003 Memory ReplacementPicture Distortion Adjustment Item Number 00 0BBlock Diagram ProsessorFrame Schematic Diagram Circuit Boards LocationSchematic Diagrams and Printed Wiring Boards SecamBoard Waveforms Schematic Diagram of a 1/2 Board CN901 4P to SpeakerSchematic Diagram of a 2/2 Board SRTBoard IC001 CXP86449-623S Printed Wiring BoardBoard Schematic Diagrams of C3 and F boards Printed Wiring BoardsC3 Board C3 Board WaveformsSemiconductors Schematic Diagram of VM1 boardVM1 Board Exploded Views ChassisSection Electrical Parts List Elect 1MF REF. NO. Part no Description Diode RN4Z Coil Carbon Metal Metal Oxide SOCKET, CRT Coil VM1 Accessories and Packing Materials 965-767-01
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