Sony KV-PF21M70, KV-TF21P11, KV-TF21M61 service manual Section SET-UP Adjustments, Beam Landing

Page 47

KV-PF21M70/TF21M61/TF21M90/TF21P11

SECTION 3

SET-UP ADJUSTMENTS

RM-952

∙

The following adjustments should be made when a complete

Perform the adjustments in the following order :

 

realignment is required or a new picture tube is installed.

1.

Beam Landing

∙

These adjustments should be performed with rated power

2.

Convergence

 

supply voltage unless otherwise noted.

3.

Focus

 

 

4.

White Balance

Controls and switches should be set as follows unless otherwise noted:

Note : Test Equipment Required.

PICTURE control

normal

1.

Color-bar/Pattern Generator

BRIGHTNESS control

normal

2.

Degausser

 

 

3.

Oscilloscope

................................................................................................................................................................................................................................

Preparation :

Purity control

∙In order to reduce the influence of geomagnetism on the set's picture tube, face it east or west.

∙Switch on the set's power and degauss with the degausser.

3-1. BEAM LANDING

1.

Input a white signal with the pattern generator.

 

BrightnessContrast } normal

2.

Set the pattern generator raster signal to a green raster.

3.

Move the deflection yoke to the rear and adjust with the purity

 

control so that the green is at the center and the blue and the red

 

take up equally sized areas on each side.

 

(See Figures 3-1 through 3-3.)

4.

Move the deflection yoke forward and adjust so that the entire

 

screen is green. (See Figure 3-1.)

5.

Switch the raster signal to blue, then to red and verify the

Fig. 3-2

Blue

Red

Green

condition.

6. When the position of the deflection yoke has been decided,

fasten the deflection yoke with the screws and DY spacers.

7. If the beam does not land correctly in all the corners, use a

magnet to adjust it.

(See Figure 3-4.)

Fig. 3-3

Purity control corrects this area.

ba

cd

Disk magnets or rotatable disk magnets correct these areas (a-d).

Fig. 3-1

Deflection yoke positioning corrects these areas.

b

c

a

d

Fig. 3-4

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Contents KV-TF21M61 KV-PF21M70 KV-TF21M90 KV-TF21P11 BG-3SCHASSISKV-PF21M70/TF21M61/TF21M90/TF21P11 SpecificationsCircuit Adjustments Table of ContentsDisassembly SET-UP 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 StartedInsert the batteries into the remote Connecting optional componentsPreset the channels automatically Connecting video equipment using the ò Monitor output jacksSecuring the TV Presetting channelsPresetting channels automatically Skipping program numbers Presetting channels manuallyChanging the on-screen display language Watching the TVAdditional tasks Selecting the picture and sound modes Setting the Wake Up timerSetting the Sleep timer Customizing the picture and soundBlocking the channels Adjusting the picture and sound settingsIndicator flashes Self-diagnosis function TroubleshootingCount the number of times the u indicator flashes Press U main power to turn off your TVTroubleshooting 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 Appears Press + or to select Desired surround sound Selecting the surround modePress Select repeatedly Until SurroundPress A/B repeatedly until you receive the sound you want Selecting a stereo or bilingual programAdditional Teletext tasks Using FastextViewing Teletext Displaying TeletextAdditional 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 Board Adjustment After IC003 Memory Replacement Picture Quality Adjustments SUB Color AdjustmentSUB HUE Adjustment Bell Filter AdjustmentItem Number 00 0B Picture Distortion AdjustmentSTV5112 TU101 BTF-WG441IIC201 TA8248KSecam 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 BUTTON, Multi BUTTON, PowerREF. NO. Part no Description Remark Beznet Assy KV-TF21P11HOLDER, FBT Description RemarkElect HOLDER, LEDMylar Elect 1MFCarbon CeramicPLUG, Connector 3P Diode PIN, Connector 4PPLUG, Connector 3P PLUG, Connector 6P100 101 Metal 102Metal Chip 103 VIBRATOR, Ceramic 104Tuner TUNER, FSS BTF-LG433 CrystalOnly 105106 Diode RD10SB 107Transistor 2SC2712-YG 108Photo Coupler ON3171-R IC Link 109 110 111 Carbon Variable Resistor 112SOCKET, CRT Coil Transistor 2SC2611113 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.
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