Service Mode Flow Chart, 20 No.YA476 | JVC AV-29MXP6/V, AV-25MXP6/V

4.7.4 SERVICE MODE FLOW CHART

SERVICE MENU					1. IF
SERVICE MENU
1. IF	2. V/C				IF SERVICE MENU				VCO (CW)	*****MHz
1. IF	2. V/C								VCO (CW)	*****MHz
3. AUDIO	4. DEF								TOO HIGH
5. VSM W/B	6. STATUS				1. VCO				ABOVE REFERENCE
7. PLUG & PLAY (ON)					2. DELAY POINT				JUST REFERENCE
									JUST REFERENCE

1-7 : SELECT	DISPLAY : EXIT								BELOW REFERENCE
1-7 : SELECT	DISPLAY : EXIT
									TOO LOW

******* **** ***** *****

**** **** *** ***

DELAY POINT

AGC TAKEOVER **

2. V/C

Setting item

V/C

PAL

1.SCREEN (READ DATA)

8.SHARP (TV/VDO 1/2/3)

2.CUTOFF / CUT OFF

9.Y DELAY (TV/VDO 1/2/3/

1. SCREEN

HBC

**

THEATER (B/G)

S-VDO)

WBC

**

3.WDR (R/G/B)

10.TINT DVD (TV/VDO/

BRI

**

4.BRIGHT (TV/VDO 1/2/3)

THEATER)

5.CONT. (TV/VDO 1/2/3)

11.AMP T.SHARP (TV/VDO)

6.COLOUR (TV/VDO 1/2/3)

7.TINT (TV/VDO 1/2/3 /

THEATER)

6. STATUS

3. AUDIO

Setting item

AUDIO

1. DCXO ADJ

STATUS

1. DCXO ADJ. =

2. NICAM lower ERRLIM

NOT NICAM ***

V/C STATUS

3. NICAM upper ERRLIM

4. A2 ID THR

ECO

EOF

NOL

VNR

**

**

**

*****

0002

*******

MENU EQUALIZER

ADC ECO = **

0009

*******

EQUALIZER RF

EQUALIZER VIDEO

EQUALIZER DVD

COSMIC STATUS

000A

*******

USER

USER

USER

** **

** **

** **

** **

SOUND TURBO

SOUND TURBO

DRAMA

THEATER

THEATER

THEATER

MUSIC

MUSIC

MUSIC

NEWS

NEWS

4. DEF

4 : 3 / 16 : 9

DEF FULL

50Hz

Setting item

1. V-SHIFT

***

1. V-SHIFT

9. COR-LO

(**)

2. V-SLOPE

10. ANGLE

3. V-SIZE

11. BOW

4. H-CENT

12. V-S. CR

5. H-SIZE

13. V-LIN

6. TRAPEZ

14. V-ZOOM

7. EW-PIN

8. COR-UP

5. VSM W/B

Setting item

Setting value (Hexadecimal)

VSM PRESET

BRIGHT

Setting value

1. BRIGHT

1. R-DRIVE

1. BRIGHT

***

2. CONT

2. G-DRIVE

Sereen size

3. COLOUR

3. B-DRIVE

FULL

4. SHARP

5.HUE

COMPRESS

Fig.3

1-20 (No.YA476)

Image 20

JVC AV-29MXP6/V, AV-25MXP6/V, AV-21MXP6/V service manual Service Mode Flow Chart, 20 No.YA476

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 Safety Precautions Leakage Current CheckAlternate Check Method No.YA4761-3 Features DVD Picture Mode Auto Signal DetectPicture Mode Cinema Surround Techninal Information Main MI-COM CPU PIN Function No.YA4761-5 Disassembly Procedure AV-21MXP6/V Removing the Rear Cover Wire Clamping and Cable TyingRemoving the Main PW Board Removing the Speaker AV-21MXP6/X No.YA4761-7 Disassembly Procedure AV-25MXP6/V Removing the Rear Cover AV-25MXP6/V No.YA4761-9 Disassembly Procedure AV-29MXP6/V Removing the Rear Cover Removing the Chassis Chassis Base and Control BaseRemoving the AV Terminal Board Remove the Rear Cover Remove the 4 screws C as shown Front Side No.YA4761-11 Memory IC Replacement Menu System Constant Setting Settings of Factory Shipment Button OperationRemote Control Direct Operation Remote Control Menu Operation Picture Setting Feature Setting Install SettingService Mode Setting Items VSM Preset Replacement of Chip Component How to install Chip parts Resistors, capacitors, etcSoldering Iron Transistors, diodes, variable resistors, etc Adjustment Preparation Preset Setting Before AdjustmentAdjustment Items „ Check Items „ VSM Preset Setting No.YA4761-17 Adjustment Location AV-21MXP6/V, AV-25MXP6/VFront 18 No.YA476 Adjustment Location AV-29MXP6/VMain PWB ASS’Y CRT Socket Service Mode Items Setting MethodMemorize the Adjustment Data Release of Service Mode Service Mode Flow Chart 20 No.YA476 Initial Setting Value of Service Mode PAL Secam NTSC3 NTSC4 Video32 ~ +31 No.YA4761-21 22 No.YA476 No.YA4761-23 AV-21MXP6/V Function Mode100Hz 300Hz 1kHz 3kHz 8kHz AV-25MXP6/V Function AV-29MXP6/V Function +12+11 No.YA4761-25 Compress 43 50Hz Others 60HzS.CR 32 ~ +31 LIN 32 ~ +31 43 50Hz 50Hz 60Hz Cool Warm Normal Theater Bright SoftTheater Adjustment Procedure Check Item Measuring Test point Adjustment part Description InstrumentB1 Voltage High Voltage HV voltmeter Delay Point Tuner / if CircuitAGC Focus Position PAL V. PositionNtsc V. Position Size PAL H. Size Ntsc H. SizeSide PIN PAL Side PIN Linearity PAL V. LinearityNtsc V. Linearity Corner PIN Ntsc H. BOW BOWPAL H. BOW Follow the same to 7 as in PAL Side PIN PAL Trapezium PINNtsc Trapezium PIN Select 8. COR-UP „ Video 2 SET Component Video CircuitWhite Composite White Balance SUB Bright SUBContrast SUB Colour SUB Tint PAL TintNtsc 3.58 Tint Ntsc 4.43 Tint VSM Preset Setting STANDARD, Soft and Theater1. R Drive to 3. B Drive to the values Warm and Normal Purity and Convergence „ Purity Adjustment No.YA4761-41 „ Static Convergence Adjustment„ Dynamic Convergence Adjustment Indication by the Power LED Self Check Functions OutlineSelf Check Items Self Check Indicating Function VPT Schematic Diagrams Copyright 2006 Victor Company of Japan, Limited Safety Indication of Parts Symbol ExampleIndications on the Circuit Diagram Specified Voltage and Waveform Values Contents AV-21MXP6/V, AV-25MXP6/V AV-29MXP6/VMain PWB Pattern 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 CRT Socket PWB Pattern AV-29MXP6/V Bass PWB Pattern Solder SideBass PWB Pattern Parts 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 4No.YA476 100 V01 L01 101 102106 103 105 104 T522 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 Colour System Basic setting for picturePicture Mode Picture Setting White Balance Picture Booster Advanced setting for picture AI ECO Sensor ECO/ECO ModeCompress Blue Back Original features for picture PIP Basic setting for sound Sound ModeSound System Balance Advanced setting for sound AI VolumeCinema Surround Equalizer Auto Signal Detect DVD Picture ModeDVD Sound 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