Sony KV-PF21M70, KV-TF21P11, KV-TF21M61 service manual Press ü + to increase the volume level

Page 29

Troubleshooting

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

Symptom

Good picture

Solutions

Press ü + to increase the volume level.

Press Û to cancel the muting.

Possible cause

The volume level is too low.

The sound is muted.

Symptom

Solutions

Possible cause

• Press A/B H until a better sound is

heard.

• Broadcast signal has a

transmission problem.

– 29 –

Snowy picture

Noisy sound

Distorted picture

Noisy sound

Check the antenna cable and connection on the TV, VCR and on the wall. (page 4)

Press SELECT until “MANUAL PROGRAM” appears on the screen then preset the channel again. (page 9)

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.

Turn off or disconnect the booster if it is in use.

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 low.

Broadcast signals are too strong.

No sound

Dotted lines or stripes

Double images or “ghosts”

No color

• Do not use a hair dryer or other

equipment near the TV.

• Adjust the antenna direction for

minimum interference. Contact a Sony

dealer for advice.

• Use a highly directional antenna.

• Use the fine tuning (FINE) function.

(page 10)

• Adjust the antenna direction. Contact a

Sony dealer for advice.

• Turn off or disconnect the booster if it is

in use.

• Press SELECT until “COLOR” appears

on the screen, then press + or – to adjust

the color level. (page 15)

• There is local interference

from cars, neon signs, hair

dryers, power generators,

etc.

• Broadcast signals are

reflected by nearby

mountains or buildings.

• The antenna direction is

inappropriate.

• Use of a booster is

inappropriate.

• The color level setting is

too low.

Good picture

Noisy sound

No picture

No sound

• If the sound of all the channels are

• The TV system setting or

noisy, check the TV system (TV SYS)

channel presetting is

setting (page 9), then press AUTO

inappropriate or

PROGR to preset the channels again

incomplete.

(page 8).

 

If the sound of some channels are noisy, select the channel, then select the appropriate TV system (TV SYS). (page 9)

• 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 off the TV for about five seconds, then turn it on again.

Abnormal color patches

TV cannot receive stereo broadcast signal

• Press SELECT until “COL SYS ” appears

on the screen, then check the color

system setting (usually set this to

“AUTO”). (page 10).

• Adjust the antenna direction. Contact a

Sony dealer for advice.

• Keep external speakers or other

electrical equipment away from the TV.

Do not move the TV while the TV is

turned on. Press U (main power) on

the TV to turn off the TV for about five

minutes, then turn it on again.

• Press A/B H until “AUTO” appears

on the screen.

• The color system setting is

inappropriate.

• The antenna direction is

inappropriate.

• The magnetic disturbance

from external speakers or

other equipment, or the

direction of the earth’s

magnetic field may affect

the TV.

• The stereo reception

setting is inappropriate.

KV-PF21M70/TF21M61/TF21M90/TF21P11

continued

24Additional Information

Additional Information 25

RM-952

Image 29
Contents KV-TF21M61 KV-PF21M70 KV-TF21M90 KV-TF21P11 BG-3SCHASSISKV-PF21M70/TF21M61/TF21M90/TF21P11 SpecificationsDisassembly Table of ContentsSET-UP Adjustments Circuit AdjustmentsDiagnostic Test Indicators Self Diagnostic FunctionStopping the STANDBY/TIMER Flash Display of STANDBY/TIMER Light Flash CountHandling of SELF-DIAGNOSTIC Screen Display SELF-DIAGNOSTIC Screen Display+BÊovercurrentÊ»OCP¼ SELF-DIAGNOSTIC CircuitConnect the antenna Getting StartedPreset the channels automatically Connecting optional componentsConnecting video equipment using the ò Monitor output jacks Insert the batteries into the remoteSecuring the TV Presetting channelsPresetting channels automatically Skipping program numbers Presetting channels manuallyChanging the on-screen display language Watching the TVAdditional tasks Setting the Sleep timer Setting the Wake Up timerCustomizing the picture and sound Selecting the picture and sound modesBlocking the channels Adjusting the picture and sound settingsCount the number of times the u indicator flashes Self-diagnosis function TroubleshootingPress U main power to turn off your TV Indicator flashesTroubleshooting Front panel Remote ControlIdentifying parts and controls KV-TF21M61/TF21M90 PF21M70/TF21M61/TF21M90/TF21P11 RM-952 VHF LOW Auto I D/K M PIC Rotation Press U to turn on the TV. When the TV isRepeatedly until you get Press Select repeatedly Selecting the surround modeUntil Surround Appears Press + or to select Desired surround soundPress A/B repeatedly until you receive the sound you want Selecting a stereo or bilingual programViewing Teletext Using FastextDisplaying Teletext Additional Teletext tasksAdditional Self-diagnosis functionCheck connection on the AC socket Troubleshooting ShortcutsCheck the antenna direction Press ü + to increase the volume level Select button 2headphone jack Front panel KV-PF21M70/TF21M61/TF21M90/TF21P11Jump Sound Progr KV-TF21P11 Your Securing the TV Desired program number appears Appears Press + or Press Progr +/- orNumber buttons until Language / English Your New Picture PF21M70/TF21M61/TF21M90/TF21P11 RM-952 KV-PF21M70/TF21M61/TF21M90/TF21P11 Press U main power to turn off your TV Indicator flashesPF21M70/TF21M61/TF21M90/TF21P11 RM-952 Sound Progr Mode Bracket Removal KV-TF21M61/TF21M90 Rear Cover RemovalChassis Assy Removal Terminal Bracket Removal Service PositionReplacement of Parts Picture Tube Removal Degauss Coil Removal∙ HOW to Handle AN ANODE-CAP ∙ Removal of ANODE-CAP ∙ Removing ProceduresBeam Landing Section SET-UP AdjustmentsHorizontal and Vertical Static Convergence ConvergenceYCH TLV G2 Screen and White Balance Adjustments Focus AdjustmentRM-952 Adjustments with CommanderAdjustment Method Adjustment Item Table INF INS TXT OPM OPB KV-PF21M70/TF21M61/TF21M90/TF21P11 SUB HUE Adjustment Picture Quality Adjustments SUB Color AdjustmentBell Filter Adjustment Board Adjustment After IC003 Memory ReplacementItem Number 00 0B Picture Distortion AdjustmentIC201 TU101 BTF-WG441ITA8248K STV5112Secam Schematic Diagrams and Printed Wiring BoardsBoard IC001 CXP86449-623S DTC114EK Semiconductors19 4-057-714-01 Piece ASSY, TLH Correction REF. NO. Part no DescriptionBeznet Assy REF. NO. Part no Description Remark BUTTON, PowerBeznet Assy KV-TF21P11 BUTTON, MultiElect Description RemarkHOLDER, LED HOLDER, FBTCarbon Elect 1MFCeramic MylarPLUG, Connector 3P PIN, Connector 4PPLUG, Connector 6P PLUG, Connector 3P Diode100 101 Metal 102Metal Chip 103 Tuner 104TUNER, FSS BTF-LG433 Crystal VIBRATOR, CeramicOnly 105106 Diode RD10SB 107Transistor 2SC2712-YG 108Photo Coupler ON3171-R IC Link 109 110 111 SOCKET, CRT Coil 112Transistor 2SC2611 Carbon Variable Resistor113 C5 Except KV-PF21M70114 115 116

KV-PF21M70, KV-TF21P11, KV-TF21M61 specifications

The Sony KV-TF21M61, KV-TF21P11, and KV-PF21M70 are iconic television models that hold a significant place in the history of consumer electronics. These CRT (cathode-ray tube) televisions were introduced during a time when home entertainment was evolving, showcasing Sony's dedication to delivering high-quality viewing experiences.

The KV-TF21M61 is known for its compact design and impressive image quality, featuring a 21-inch screen size that was perfect for small to medium-sized rooms. Equipped with Sony's advanced Trinitron technology, it delivers vibrant colors and sharp images, making it a favorite among viewers who appreciate clarity and detail. The television features a built-in tuner, allowing users to easily access various TV channels without the need for an external set-top box. The design includes multiple connectivity options, including standard composite inputs, offering versatility for connecting gaming consoles and DVD players.

Similarly, the KV-TF21P11 model carries forward Sony's commitment to exceptional picture quality. With anti-glare screens and enhanced viewing angles, this model ensures that viewers enjoy clear images from different positions in the room. Its user-friendly interface allows easy navigation through channel selections and picture adjustments. The model also includes stereo speakers, providing a richer audio experience that complements the stunning visuals.

On the other hand, the KV-PF21M70 is seen as an evolution of these models, featuring a larger display while retaining the core technological advancements of its predecessors. This unit incorporates Sony's Picture-in-Picture (PiP) feature, allowing users to watch two channels simultaneously or view external input while keeping an eye on live TV. This functionality enhances versatility and user engagement, making it a practical choice for avid viewers who don’t want to miss out on their favorite programs.

All three models are equipped with various sound enhancement features, including bass and treble controls, ensuring users can tailor their audio experience according to their preferences. The robust build quality and reliability typical of Sony products ensure that these televisions remain cherished items even as technology progresses and newer formats emerge.

Overall, the KV-TF21M61, KV-TF21P11, and KV-PF21M70 are more than just old CRT televisions; they represent a significant era in television technology, characterized by brilliant visuals, sound quality, and functional designs that laid the groundwork for modern home entertainment systems. These models remain a testament to Sony's pioneering efforts in the realm of consumer electronics.