PAL V. Linearity, Ntsc V. Linearity, Parallel | JVC AV-25MXP6/V

Item

Measuring

Test point

Adjustment part

Description

instrument

V.LINEARITY

Signal

[4. DEF]

PAL V. LINEARITY

generator

12. V-S. CR

(1) Receive a PAL crosshatch signal.

13. V-LIN

(2) Select 4. DEF from the SERVICE MODE.

Remote

(3) Select <12. V-S.CR>.

control unit

(4) Set the initial setting value of <12. V-S. CR>.

(5)

Select <13. V-LIN>.

(6)

Set the initial setting value of <13. V-LIN>.

Top

(7)

Adjust <12. V-S. CR> and <13. V-LIN> so that the

spaces of each line on TOP, CENTRE and

BOTTOM become uniform.

Centre

(8) Press the [OK] key to memorize the set values.

NTSC V. LINEARITY

(1)

Receive a NTSC crosshatch signal.

Bottom

(2)

Follow the same step 2 to 8 as in PAL V-S. CR.

CORNER PIN

Signal

[4. DEF]

PAL CORNER PIN

[Except

generator

8. COR-UP

(1) Receive a PAL crosshatch signal.

AV-21MXP6/V]

9. COR-LO

(2) Select 4. DEF from the SERVICE MODE.

Remote

(3) Select <8. COR-UP>.

control unit

(4) Set the initial setting value of <8. COR-UP>.

(5)

Select <9. COR-LO>.

Straigt

(6)

Set the initial setting value of <9. COR-LO>.

(7)

Adjust <8. COR-UP> and <9. COR-LO> so that the

vertical lines at the four corners on the screen are

straight.

(8)

Press the [OK] key to memorize the set values.

NTSC CORNER PIN

(1)

Receive a NTSC crosshatch signal.

(2)

Follow the same step 2 to 8 as in PAL CORNER.

H. PARALLEL

Signal

[4.DEF]

PAL H. PARALLEL

generator

10. ANGLE

(1) Receive a PAL crosshatch signal.

(2)

Select 4. DEF from the SERVICE MODE.

Remote

(3) Select <10. ANGLE>.

control unit

(4) Set the initial setting value of <10. ANGLE>.

(5)

Adjust <10. ANGLE> to optimize the trapezium

Parallel

distortion at the centre of the screen.

(6)

Press the [OK] key to memorize the set values.

NTSC H. PARALLEL

(1)

Receive a NTSC crosshatch signal.

(2)

Follow the same step 2 to 6 as in PAL H.

PARALLEL.

(No.YA476)1-33

Image 33

JVC AV-25MXP6/V PAL V. Linearity, Ntsc V. Linearity, PAL Corner PIN, Ntsc Corner PIN, PAL H. Parallel

AV-29MXP6/V, AV-21MXP6/V, AV-25MXP6/V specifications

The JVC AV-25MXP6/V, AV-21MXP6/V, and AV-29MXP6/V are a trio of high-performance CRT televisions that represent a combination of cutting-edge technology and practical design, catering to the diverse needs of home entertainment enthusiasts. These models are characterized by their impressive picture quality, robust build, and user-friendly features, making them a prominent choice during their production era.

One of the key features of these models is their screen sizes, which cater to different room sizes and viewing preferences. The AV-25MXP6/V offers a compact 25-inch display, ideal for smaller living spaces or bedrooms, while the AV-21MXP6/V with its 21-inch screen is perfect for desk setups or as a secondary television. The AV-29MXP6/V, on the other hand, boasts a larger 29-inch display, making it suitable for home theaters or larger family rooms.

JVC is renowned for its superior picture technology, and these models are no exception. They utilize a high-quality CRT screen that provides deep contrast, vivid colors, and sharp details. The picture performance is further enhanced by JVC's proprietary circuitry, including a dynamic contrast system that adjusts brightness and contrast levels based on the content being displayed, resulting in a more immersive viewing experience.

Moreover, these televisions come equipped with several input options, including RF, composite, and S-video inputs, allowing users to connect multiple external devices such as DVD players, game consoles, and VCRs. With built-in tuners, viewers can easily access over-the-air broadcasting, making these models versatile entertainment hubs.

Another noteworthy characteristic is the user-friendly interface that JVC has engineered into the AV-25MXP6/V, AV-21MXP6/V, and AV-29MXP6/V models. The on-screen menu provides quick access to settings and customization options, allowing users to tailor the viewing experience to their preferences, including the ability to adjust color tones and picture settings.

In addition to their functionality, these televisions also sport an elegant design that incorporates a sleek frame and aesthetically pleasing finish, making them a suitable complement to any home décor.

Overall, the JVC AV-25MXP6/V, AV-21MXP6/V, and AV-29MXP6/V models represent a harmonious blend of technology, style, and user-centric features, making them reliable choices for anyone seeking quality CRT televisions for their home entertainment needs. Though newer technologies have since emerged, these models remain a fond memory for many who experienced their remarkable performance.

Contents

AV-29MXP6/V AV-21MXP6/V AV-25MXP6/V AV-29MXP6/V Items Contents Leakage Current Check Safety PrecautionsAlternate Check Method No.YA4761-3 Auto Signal Detect Features DVD Picture ModePicture Mode Cinema Surround No.YA4761-5 Techninal Information Main MI-COM CPU PIN Function Wire Clamping and Cable Tying Disassembly Procedure AV-21MXP6/V Removing the Rear CoverRemoving the Main PW Board Removing the Speaker No.YA4761-7 AV-21MXP6/X Disassembly Procedure AV-25MXP6/V Removing the Rear Cover No.YA4761-9 AV-25MXP6/V Removing the Chassis Chassis Base and Control Base Disassembly Procedure AV-29MXP6/V Removing the Rear CoverRemoving the AV Terminal Board Remove the Rear Cover Remove the 4 screws C as shown No.YA4761-11 Front Side Menu Memory IC Replacement Settings of Factory Shipment Button Operation System Constant SettingRemote Control Direct Operation Remote Control Menu Operation Picture Setting Install Setting Feature SettingService Mode Setting Items VSM Preset How to install Chip parts Resistors, capacitors, etc Replacement of Chip ComponentSoldering Iron Transistors, diodes, variable resistors, etc Preset Setting Before Adjustment Adjustment PreparationAdjustment Items „ Check Items „ VSM Preset Setting Adjustment Location AV-21MXP6/V, AV-25MXP6/V FrontNo.YA4761-17 Adjustment Location AV-29MXP6/V Main PWB ASS’Y CRT Socket18 No.YA476 Setting Method Service Mode ItemsMemorize the Adjustment Data Release of Service Mode 20 No.YA476 Service Mode Flow Chart PAL Secam NTSC3 NTSC4 Video Initial Setting Value of Service Mode32 ~ +31 No.YA4761-21 22 No.YA476 No.YA4761-23 Mode AV-21MXP6/V Function100Hz 300Hz 1kHz 3kHz 8kHz AV-25MXP6/V Function +12 AV-29MXP6/V Function+11 No.YA4761-25 43 50Hz Others 60Hz CompressS.CR 32 ~ +31 LIN 32 ~ +31 50Hz 60Hz 43 50Hz Bright Soft TheaterCool Warm Normal Theater Measuring Test point Adjustment part Description Instrument Adjustment Procedure Check ItemB1 Voltage High Voltage HV voltmeter Tuner / if Circuit Delay PointAGC Focus PAL V. Position PositionNtsc V. Position Size Ntsc H. Size PAL H. SizeSide PIN PAL Side PIN PAL V. Linearity LinearityNtsc V. Linearity Corner PIN BOW PAL H. BOWNtsc H. BOW PAL Trapezium PIN Follow the same to 7 as in PAL Side PINNtsc Trapezium PIN Select 8. COR-UP Video Circuit „ Video 2 SET ComponentWhite Composite White Balance SUB SUB BrightContrast SUB Colour PAL Tint SUB TintNtsc 3.58 Tint Ntsc 4.43 Tint STANDARD, Soft and Theater VSM Preset Setting1. R Drive to 3. B Drive to the values Warm and Normal Purity and Convergence „ Purity Adjustment „ Static Convergence Adjustment „ Dynamic Convergence AdjustmentNo.YA4761-41 Self Check Functions Outline Indication by the Power LEDSelf Check Items Self Check Indicating Function VPT Copyright 2006 Victor Company of Japan, Limited Schematic Diagrams Indication of Parts Symbol Example SafetyIndications on the Circuit Diagram Specified Voltage and Waveform Values AV-21MXP6/V, AV-25MXP6/V AV-29MXP6/V ContentsMain PWB Pattern 2No.YA476 No.YA4762-32-4No.YA476 Main PWB Front Control PWB1/2 No.YA4762-72-8No.YA476 Main PWB Circuit Diagram AV-21MXP6/V 1/4 2/4 SHEET1 No.YA4762-92-10No.YA476 Main PWB Circuit Diagram AV-21MXP6/V 3/44/4 SHEET2 No.YA4762-112-12No.YA476 Main PWB Circuit Diagram AV-25MXP6/V 1/4 2/4 Sheet No.YA4762-132-14No.YA476 Main PWB Circuit Diagram AV-25MXP6/V 3/44/4 SHEET4 No.YA4762-152-16No.YA476 Main PWB Circuit Diagram AV-29MXP6/V 1/2 Sheet No.YA4762-172-18No.YA476 Main PWB Circuit Diagram AV-29MXP6/V 2/2 Sheet No.YA4762-192-20No.YA476 CRT Socket PWB Circuit Diagram AV-29MXP6/V Sheet No.YA4762-212-22No.YA476 Front Control PWB Circuit Diagram AV-29MXP6/V Sheet No.YA4762-232-24No.YA476 Bass PWB Circuit Diagram Sheet No.YA4762-25 26No.YA476 Front No.YA4762-272-28No.YA476 Main PWB Pattern AV-29MXP6/V Bass PWB Pattern Solder Side CRT Socket PWB Pattern AV-29MXP6/VBass PWB Pattern Parts Side No.YA4762-292-30No.YA476 No.YA4762-312-32No.YA476 Front Control PWB Pattern AV-29MXP6/V No.YA4762-332-34No.YA476 Voltage Charts AV-21MXP6/V, AV-25MXP6/V No.YA4762-35 Waveforms AV-21MXP6/V, AV-25MXP6/V Main PWB 36No.YA476 No.YA476 No.YA4763-1 Parts List Contents No.YA4763-3 Using P.W. Board & Remote Control Unit 100 V01 L01 101 102 106 103 105 104 T5224No.YA476 No.YA4763-5 Printed Wiring Board Parts List 6No.YA476 No.YA4763-7 8No.YA476 No.YA4763-9 10No.YA476 487 5 No.YA4763-11 12No.YA476 V01 L01 100 101 102 106 103 105 104 No.YA4763-13 Main P.W. Board Assy SCW-1646A-H2 14No.YA476 No.YA4763-15 16No.YA476 No.YA4763-17 B Assy AV-29MXP6/V 18No.YA476 No.YA4763-19 V01 L01 100 101 103 DY01 2822 3018 102 40 T522 20No.YA476 Main P.W. Board Assy SCW-1647A-H2 No.YA4763-21 22No.YA476 No.YA4763-23 24No.YA476 CRT Socket P.W. Board Assy SCW-3037A-H2 No.YA4763-25 Bass P.W. Board Assy SCW-6003A-H2 Packing Packing Parts List Colour Television Do not allow objects or liquid into the cabinet openings Main features Knowing your TV’s features No. Press Remote control buttons and basic functions Remote control buttons and basic functions Front of the TV TV buttons and functions Turn off the equipment including the TV before connecting Setting up your TV Setting up your TV Basic setting for picture Picture ModeColour System Picture Booster Picture Setting White Balance AI ECO Sensor ECO/ECO Mode Advanced setting for pictureCompress Blue Back PIP Original features for picture Sound Mode Basic setting for soundSound System Balance AI Volume Advanced setting for soundCinema Surround Equalizer DVD Picture Mode Auto Signal DetectDVD Sound Mode DVD Menu Customized setting Beep VIDEO-2 Setting Display Auto Program TV channel presetting Delete TV channel presetting CH/CC number Additional preparation Before connecting Troubleshooting AV-25MXP6 Speciﬁcations Model AV-29B316 AV-29M316 AV-29S356 AV-29B316BK