JVC AV-25MXP6/V Safety, Specified Voltage and Waveform Values, Indication of Parts Symbol Example

Page 45

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

STANDARD CIRCUIT DIAGRAM

NOTE ON USING CIRCUIT DIAGRAMS

1.SAFETY

The components identified by the symbol and shading are critical for safety. For continued safety replace safety ciritical components only with manufactures recommended parts.

2.SPECIFIED VOLTAGE AND WAVEFORM VALUES

The voltage and waveform values have been measured under the following conditions.

(1)Input signal

: Colour bar signal

(2)Setting positions of

 

 

each knob/button and

: Original setting position

variable resistor

 

when shipped

(3)Internal resistance of tester

: DC 20k/V

 

(4)Oscilloscope sweeping time

: H

20µs / div

 

: V

5ms / div

 

: Othters

Sweeping time is

 

 

specified

(5)Voltage values

: All DC voltage values

Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.

3.INDICATION OF PARTS SYMBOL [EXAMPLE]

In the PW board

: R1209 R209

4.INDICATIONS ON THE CIRCUIT DIAGRAM

(1)Resistors

Resistance value

 

No unit

: []

K

: [k]

M

: [M]

Rated allowable power

No indication

: 1/16 [W]

Others

: As specified

Type

 

No indication

: Carbon resistor

OMR

: Oxide metal film resistor

MFR

: Metal film resistor

MPR

: Metal plate resistor

UNFR

: Uninflammable resistor

FR

: Fusible resistor

Composition resistor 1/2 [W] is specified as 1/2S or Comp.

(2)Capacitors

 

Capacitance value

 

1 or higher

: [pF]

less than 1

: [µF]

Withstand voltage

 

No indication

: DC50[V]

Others

: DC withstand voltage [V]

AC indicated

: AC withstand voltage [V]

Electrolytic Capacitors

47/50[Example]: Capacitance value [µF]/withstand voltage[V]

Type

 

 

No indication

: Ceramic capacitor

 

MM

: Metalized mylar capacitor

PP

: Polypropylene capacitor

MPP

: Metalized polypropylene capacitor

MF

: Metalized film capacitor

TF

: Thin film capacitor

 

BP

: Bipolar electrolytic capacitor

TAN

: Tantalum capacitor

 

(3)Coils

 

 

No unit

: [µH]

 

Others

: As specified

 

(4)Power Supply

 

 

 

: B1

: B2 (12V)

 

: 9V

: 5V

Respective voltage values are indicated

 

(5)Test point

 

 

: Test point

: Only test point display

(6)Connecting method

 

 

 

: Connector

: Wrapping or soldering

: Receptacle

(7)Ground symbol

: LIVE side ground

: ISOLATED(NEUTRAL) side ground

: EARTH ground

: DIGITAL ground

5.NOTE FOR REPAIRING SERVICE

This model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND and the ISOLATED(NEUTRAL) : ( ) side GND. Therefore, care must be taken for the following points.

(1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. if the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out.

(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time.

If the above precaution is not respected, a fuse or any parts will be broken.

Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice.

NOTE

Due improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list.

When ordering parts, please use the numbers that appear in the Parts List.

(No.YA476)2-1

Image 45
Contents AV-29MXP6/V AV-21MXP6/V AV-25MXP6/V AV-29MXP6/V Items ContentsLeakage Current Check Safety PrecautionsAlternate Check Method No.YA4761-3Auto Signal Detect Features DVD Picture ModePicture Mode Cinema SurroundNo.YA4761-5 Techninal Information Main MI-COM CPU PIN FunctionWire Clamping and Cable Tying Disassembly Procedure AV-21MXP6/V Removing the Rear CoverRemoving the Main PW Board Removing the SpeakerNo.YA4761-7 AV-21MXP6/XDisassembly Procedure AV-25MXP6/V Removing the Rear Cover No.YA4761-9 AV-25MXP6/VRemoving 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 shownNo.YA4761-11 Front SideMenu Memory IC ReplacementSettings of Factory Shipment Button Operation System Constant SettingRemote Control Direct Operation Remote Control Menu Operation Picture SettingInstall Setting Feature SettingService Mode Setting Items VSM PresetHow to install Chip parts Resistors, capacitors, etc Replacement of Chip ComponentSoldering Iron Transistors, diodes, variable resistors, etcPreset Setting Before Adjustment Adjustment PreparationAdjustment Items „ Check Items „ VSM Preset SettingAdjustment 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 Mode20 No.YA476 Service Mode Flow ChartPAL Secam NTSC3 NTSC4 Video Initial Setting Value of Service Mode32 ~ +31 No.YA4761-2122 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.YA4761-2543 50Hz Others 60Hz CompressS.CR 32 ~ +31 LIN 32 ~ +3150Hz 60Hz 43 50HzBright Soft TheaterCool Warm Normal Theater Measuring Test point Adjustment part Description Instrument Adjustment Procedure Check ItemB1 Voltage High Voltage HV voltmeterTuner / if Circuit Delay PointAGC FocusPAL V. Position PositionNtsc V. Position SizeNtsc H. Size PAL H. SizeSide PIN PAL Side PINPAL V. Linearity LinearityNtsc V. Linearity Corner PINBOW PAL H. BOWNtsc H. BOW PAL Trapezium PIN Follow the same to 7 as in PAL Side PINNtsc Trapezium PIN Select 8. COR-UPVideo Circuit „ Video 2 SET ComponentWhite Composite White BalanceSUB SUB BrightContrast SUB ColourPAL Tint SUB TintNtsc 3.58 Tint Ntsc 4.43 TintSTANDARD, Soft and Theater VSM Preset Setting1. R Drive to 3. B Drive to the values Warm and NormalPurity 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 FunctionVPT Copyright 2006 Victor Company of Japan, Limited Schematic DiagramsIndication of Parts Symbol Example SafetyIndications on the Circuit Diagram Specified Voltage and Waveform ValuesAV-21MXP6/V, AV-25MXP6/V AV-29MXP6/V ContentsMain PWB Pattern 2No.YA476No.YA4762-32-4No.YA476 Main PWBFront Control PWB1/2 No.YA4762-72-8No.YA476 Main PWB Circuit Diagram AV-21MXP6/V 1/4 2/4 SHEET1No.YA4762-92-10No.YA476 Main PWB Circuit Diagram AV-21MXP6/V 3/44/4 SHEET2No.YA4762-112-12No.YA476 Main PWB Circuit Diagram AV-25MXP6/V 1/4 2/4 SheetNo.YA4762-132-14No.YA476 Main PWB Circuit Diagram AV-25MXP6/V 3/44/4 SHEET4No.YA4762-152-16No.YA476 Main PWB Circuit Diagram AV-29MXP6/V 1/2 SheetNo.YA4762-172-18No.YA476 Main PWB Circuit Diagram AV-29MXP6/V 2/2 SheetNo.YA4762-192-20No.YA476 CRT Socket PWB Circuit Diagram AV-29MXP6/V SheetNo.YA4762-212-22No.YA476 Front Control PWB Circuit Diagram AV-29MXP6/V SheetNo.YA4762-232-24No.YA476 Bass PWB Circuit Diagram SheetNo.YA4762-25 26No.YA476 FrontNo.YA4762-272-28No.YA476 Main PWB Pattern AV-29MXP6/VBass PWB Pattern Solder Side CRT Socket PWB Pattern AV-29MXP6/VBass PWB Pattern Parts Side No.YA4762-292-30No.YA476No.YA4762-312-32No.YA476 Front Control PWB Pattern AV-29MXP6/VNo.YA4762-332-34No.YA476 Voltage Charts AV-21MXP6/V, AV-25MXP6/VNo.YA4762-35 Waveforms AV-21MXP6/V, AV-25MXP6/VMain PWB 36No.YA476No.YA476 No.YA4763-1 Parts ListContents No.YA4763-3 Using P.W. Board & Remote Control Unit100 V01 L01 101 102 106 103 105 104 T5224No.YA476 No.YA4763-5 Printed Wiring Board Parts List6No.YA476 No.YA4763-7 8No.YA476 No.YA4763-9 10No.YA476 487 5No.YA4763-11 12No.YA476 V01 L01 100 101 102 106 103 105 104No.YA4763-13 Main P.W. Board Assy SCW-1646A-H214No.YA476 No.YA4763-15 16No.YA476 No.YA4763-17 B Assy AV-29MXP6/V 18No.YA476No.YA4763-19 V01 L01 100 101 103 DY01 2822 3018 102 40 T52220No.YA476 Main P.W. Board Assy SCW-1647A-H2No.YA4763-21 22No.YA476 No.YA4763-23 24No.YA476 CRT Socket P.W. Board Assy SCW-3037A-H2No.YA4763-25 Bass P.W. Board Assy SCW-6003A-H2Packing Packing Parts List Colour Television Do not allow objects or liquid into the cabinet openings Main features Knowing your TV’s featuresNo. Press Remote control buttons and basic functionsRemote control buttons and basic functions Front of the TV TV buttons and functionsTurn off the equipment including the TV before connecting Setting up your TVSetting up your TV Basic setting for picture Picture ModeColour System Picture Booster Picture Setting White BalanceAI ECO Sensor ECO/ECO Mode Advanced setting for pictureCompress Blue BackPIP Original features for pictureSound Mode Basic setting for soundSound System BalanceAI Volume Advanced setting for soundCinema Surround EqualizerDVD Picture Mode Auto Signal DetectDVD Sound Mode DVD MenuCustomized setting Beep VIDEO-2 Setting DisplayAuto Program TV channel presettingDelete TV channel presetting CH/CC number Additional preparation Before connectingTroubleshooting AV-25MXP6 SpecificationsModel AV-29B316 AV-29M316 AV-29S356 AV-29B316BK

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.