Pal H. Bow, Ntsc H. BOW | JVC AV-21MXP6/V, AV-25MXP6/V guide

Item

Measuring

Test point

Adjustment part

Description

instrument

H. BOW

Signal

[4.DEF]

PAL H. BOW

generator

11. BOW

(1) Receive a PAL crosshatch signal.

(2)

Select 4. DEF from the SERVICE MODE.

Remote

(3) Select <11. BOW>.

control unit

(4) Set the initial setting value of <11. BOW>.

(5)

Adjust <11. BOW> to optimize the horizontal arc

Straight

distortion.

(6)

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

NTSC H. BOW

(1)

Receive a NTSC crosshatch signal.

(2)

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

COMPRESS : ON (16:9)

Item

Measuring

Test point

Adjustment part

Description

instrument

V. SIZE

Signal

[4.DEF]

PAL V. SIZE

generator

14. V. ZOOM

(1) Receive a circle pattern signal of vertical frequency

Remote

3. V-SIZE

50Hz (PAL).

(2) Set the COMPRESS(16 : 9) to ON.

control unit

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

(4)

Set the initial setting value of <14. V. ZOOM>.

Screen size

(5)

Select <3. V-SIZE>.

(6)

Set the initial setting value of <3. V-SIZE>.

(7)

Adjust <3. V-SIZE>to set the vertical amplitude of

the image to the value shown in the left hand side

list.

Screen

Vertical

size

amplitude

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

NTSC V. SIZE

(1)

Receive a crosshatch signal of vertical frequency

60Hz (NTSC).

(2)

Follow the same step 2 to 8 as in PAL V. SIZE.

Vertical amplitude

305 mm

V. SLOPE

Signal

[4.DEF]

PAL V. SLOPE

generator

2. V-SLOPE

(1) Receive a circle pattern signal of vertical frequency

Remote

50Hz (PAL).

(2) Set the COMPRESS(16 : 9) to ON.

control unit

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

(4)

Select <2. V-SLOPE>.

(5)

Set the initial setting value of <2. V-SLOPE>.

(6)

Adjust <2. V-SLOPE>to make "A = B".

A

(7)

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

NTSC V. SLOPE

Blanking line

(1)

Receive a circle pattern signal of vertical frequency

B

60Hz (NTSC).

(2)

Follow the same step 2 to 7 as in PAL V-SLOPE.

1-34 (No.YA476)

Image 34

JVC AV-21MXP6/V, AV-25MXP6/V, AV-29MXP6/V service manual Pal H. Bow, Ntsc H. BOW

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 Items Contents AV-21MXP6/V AV-25MXP6/V AV-29MXP6/V Alternate Check Method Safety PrecautionsLeakage Current Check No.YA4761-3 Picture Mode Features DVD Picture ModeAuto Signal Detect Cinema Surround Techninal Information Main MI-COM CPU PIN Function No.YA4761-5 Removing the Main PW Board Disassembly Procedure AV-21MXP6/V Removing the Rear CoverWire Clamping and Cable Tying Removing the Speaker AV-21MXP6/X No.YA4761-7 Disassembly Procedure AV-25MXP6/V Removing the Rear Cover AV-25MXP6/V No.YA4761-9 Removing the AV Terminal Board Disassembly Procedure AV-29MXP6/V Removing the Rear CoverRemoving the Chassis Chassis Base and Control Base Remove the Rear Cover Remove the 4 screws C as shown Front Side No.YA4761-11 Memory IC Replacement Menu Remote Control Direct Operation System Constant SettingSettings of Factory Shipment Button Operation Remote Control Menu Operation Picture Setting Service Mode Setting Items Feature SettingInstall Setting VSM Preset Soldering Iron Replacement of Chip ComponentHow to install Chip parts Resistors, capacitors, etc Transistors, diodes, variable resistors, etc Adjustment Items „ Check Items Adjustment PreparationPreset Setting Before Adjustment „ VSM Preset Setting Front Adjustment Location AV-21MXP6/V, AV-25MXP6/VNo.YA4761-17 Main PWB ASS’Y CRT Socket Adjustment Location AV-29MXP6/V18 No.YA476 Memorize the Adjustment Data Service Mode ItemsSetting Method Release of Service Mode Service Mode Flow Chart 20 No.YA476 32 ~ +31 Initial Setting Value of Service ModePAL Secam NTSC3 NTSC4 Video No.YA4761-21 22 No.YA476 No.YA4761-23 100Hz 300Hz 1kHz 3kHz 8kHz AV-21MXP6/V FunctionMode AV-25MXP6/V Function +11 AV-29MXP6/V Function+12 No.YA4761-25 S.CR 32 ~ +31 Compress43 50Hz Others 60Hz LIN 32 ~ +31 43 50Hz 50Hz 60Hz Theater Bright SoftCool Warm Normal Theater B1 Voltage Adjustment Procedure Check ItemMeasuring Test point Adjustment part Description Instrument High Voltage HV voltmeter AGC Delay PointTuner / if Circuit Focus Ntsc V. Position PositionPAL V. Position Size Side PIN PAL H. SizeNtsc H. Size PAL Side PIN Ntsc V. Linearity LinearityPAL V. Linearity Corner PIN PAL H. BOW BOWNtsc H. BOW Ntsc Trapezium PIN Follow the same to 7 as in PAL Side PINPAL Trapezium PIN Select 8. COR-UP White „ Video 2 SET ComponentVideo Circuit Composite White Balance Contrast SUB BrightSUB SUB Colour Ntsc 3.58 Tint SUB TintPAL Tint Ntsc 4.43 Tint 1. R Drive to 3. B Drive to the values VSM Preset SettingSTANDARD, Soft and Theater Warm and Normal Purity and Convergence „ Purity Adjustment „ Dynamic Convergence Adjustment „ Static Convergence AdjustmentNo.YA4761-41 Self Check Items Indication by the Power LEDSelf Check Functions Outline Self Check Indicating Function VPT Schematic Diagrams Copyright 2006 Victor Company of Japan, Limited Indications on the Circuit Diagram SafetyIndication of Parts Symbol Example Specified Voltage and Waveform Values Main PWB Pattern ContentsAV-21MXP6/V, AV-25MXP6/V AV-29MXP6/V 2No.YA476 Main PWB No.YA4762-32-4No.YA476 Front Control PWB1/2 Main PWB Circuit Diagram AV-21MXP6/V 1/4 2/4 SHEET1 No.YA4762-72-8No.YA476 Main PWB Circuit Diagram AV-21MXP6/V 3/44/4 SHEET2 No.YA4762-92-10No.YA476 Main PWB Circuit Diagram AV-25MXP6/V 1/4 2/4 Sheet No.YA4762-112-12No.YA476 Main PWB Circuit Diagram AV-25MXP6/V 3/44/4 SHEET4 No.YA4762-132-14No.YA476 Main PWB Circuit Diagram AV-29MXP6/V 1/2 Sheet No.YA4762-152-16No.YA476 Main PWB Circuit Diagram AV-29MXP6/V 2/2 Sheet No.YA4762-172-18No.YA476 CRT Socket PWB Circuit Diagram AV-29MXP6/V Sheet No.YA4762-192-20No.YA476 Front Control PWB Circuit Diagram AV-29MXP6/V Sheet No.YA4762-212-22No.YA476 Bass PWB Circuit Diagram Sheet No.YA4762-232-24No.YA476 Front No.YA4762-25 26No.YA476 Main PWB Pattern AV-29MXP6/V No.YA4762-272-28No.YA476 Bass PWB Pattern Parts Side CRT Socket PWB Pattern AV-29MXP6/VBass PWB Pattern Solder Side No.YA4762-292-30No.YA476 Front Control PWB Pattern AV-29MXP6/V No.YA4762-312-32No.YA476 Voltage Charts AV-21MXP6/V, AV-25MXP6/V No.YA4762-332-34No.YA476 Waveforms AV-21MXP6/V, AV-25MXP6/V No.YA4762-35 36No.YA476 Main PWB No.YA476 Parts List No.YA4763-1 Contents Using P.W. Board & Remote Control Unit No.YA4763-3 106 103 105 104 T522 100 V01 L01 101 1024No.YA476 Printed Wiring Board Parts List No.YA4763-5 6No.YA476 No.YA4763-7 8No.YA476 No.YA4763-9 487 5 10No.YA476 No.YA4763-11 V01 L01 100 101 102 106 103 105 104 12No.YA476 Main P.W. Board Assy SCW-1646A-H2 No.YA4763-13 14No.YA476 No.YA4763-15 16No.YA476 No.YA4763-17 18No.YA476 B Assy AV-29MXP6/V V01 L01 100 101 103 DY01 2822 3018 102 40 T522 No.YA4763-19 Main P.W. Board Assy SCW-1647A-H2 20No.YA476 No.YA4763-21 22No.YA476 No.YA4763-23 CRT Socket P.W. Board Assy SCW-3037A-H2 24No.YA476 Bass P.W. Board Assy SCW-6003A-H2 No.YA4763-25 Packing Packing Parts List Colour Television Do not allow objects or liquid into the cabinet openings Knowing your TV’s features Main features Remote control buttons and basic functions No. Press Remote control buttons and basic functions TV buttons and functions Front of the TV Setting up your TV Turn off the equipment including the TV before connecting Setting up your TV Picture Mode Basic setting for pictureColour System Picture Setting White Balance Picture Booster Compress Advanced setting for pictureAI ECO Sensor ECO/ECO Mode Blue Back Original features for picture PIP Sound System Basic setting for soundSound Mode Balance Cinema Surround Advanced setting for soundAI Volume Equalizer DVD Sound Mode Auto Signal DetectDVD Picture Mode DVD Menu Customized setting VIDEO-2 Setting Display Beep TV channel presetting Auto Program Delete TV channel presetting CH/CC number Before connecting Additional preparation Troubleshooting Speciﬁcations AV-25MXP6 Model AV-29B316 AV-29M316 AV-29S356 AV-29B316BK