JVC AV-25MXP6/V, AV-21MXP6/V, AV-29MXP6/V service manual Front Control PWB1/2

Page 48

[AV-29MXP6/V]

MAIN PWB

R

SCL

IC701 MAIN MICRO COMPUTER/TELETEXT DECODE/IF.VIDEO.RGB.SYNC.DEF. PROCESS

G

IC351

SDA

V01

IC702

B

RGB OUT

TU001

MAIN MEMORY

TUNER

IF

108,109

SCL1, SDA1

127,128

SCL0, SDA0

I2C

111

BUS

MICRO

TELETEXT DECODER

ROTATION

COMPUTER

DIGITAL SIGNAL PROCESS

2, 8

IC481

3, 6

98,99

PW_LED

ROTATION

97

REMOTE

I/O

R

G

B

PORT

Q208, Q209

ROTATION

119

KEY_IN

VM OUT

COIL

PEAKING SCAN

ROUT

85

122

S_V_DET

VELOCITY MOD.

GOUT

86

VM COIL

U/V DELAY

29, 30

SIF IN

BOUT

87

CRT SOCKET

SF101

SKIN TONE

SIF DETECT

OSD/TEXT

SAW FILTER

U/V TINT

INSERT

PWB

SATURATION

SVM

65

SF102

24, 25

VIF IN

VIF DETECT/AGC/AFT

PIP_SEL

75

IC301

SAW FILTER

SOUND TRAP

PIP CONTROL

79

G3/Y

36,37

I2C

80

B3/PB

J801

S_V_DET

78

R3/PR

Vin/R2/Pr

70

9

V

S-VIDEO

Y1

55

V2/Y

VIDEO

B-Y R-Y

R

G

B

Yin/G2/Y

72

8

Y

D-A

RGB

SELECT

CONVERT

MATRIX

C1

Uin/R2/Pr

71

7

U

VIDEO

VIDEO-1

CVBS1

58

Y1/CVBS

C

COLOUR

BASE-BAND

RGB MATRIX

S-VIDEO

V

IDENT.

DECODER

59

C1

DELAY LINE

&

OVER

INPUT

L

L1

Y

GAMMA

SAMPLE

CONTROL

6

SEL

R

R1

DRAM

51

V3

41

V. DRIVE

VDRA+, VDRB-

22, 23

VSP

J802

42

HSP

SYNC

V2/Y

PROC.

H/V

Y

SYNC

SCALER

49

L1

PB

SEP.

50

COMB FILTER

VIDEO-2

PB

R1

HOUT

67

FRONT CONTROL

PR

Y DELAY ADJ.

H. DRIVE

COLOUR

J801

COMPONENT

PR

DEC.

VIDEO

PWB(2/2)

HEADPHONE

J803

L2

56

L2

INPUT

L

CVBSO/PIP(PIP_OUT)

64

20

CVSS2(Y)

R2

57

R2

A-D

R

CONVERT

SPEAKER L

AUDIO

SELECT

34

L3

BASS PWB

35

R3

A_L

60

AUDIO

3

14

9

13

L_AOUT

AUDIO

CONTROL

A_R

61

IC671

IC601

J804

V-OUT

48

V_OUT

SELECT

BASS AMP 13

VIDEO

AUDIO AMP

L-OUT

L_OUT

2

3

23

R_AOUT

OUTPUT

L

36

R-OUT

R

37

R_OUT

SPEAKER R

IC971

3.3V

3.3V REG

1, 7

IC401

5

V

Q983

V. OUT

Q984

1.8V

1.8V REG

DY01

Q981

Q522

H DEF YOKE

H. OUT

Q982

1.8V

J802

V3

1.8V REG

VIDEO

VIDEO-3

J803

L3

IC972

3.3V_STB

INPUT

3.3V REG

AUDIO-L

D901

(FRONT)

J804

R3

REMOCON

POWER

RECT

AUDIO-R

RECEIVER

LED

T921

IC975

SW

5V

5V REG

TRANSF.

8V

TV/VIDEO

VOL+

VOL-

CH+

CH-

MENU

IC973

12V

FOCUS

12V REG

32V

B1

T522

SCREEN

L951

FBT

S901

F901

AC IN

IC921

PC901

IC951

EHT

FRONT CONTROL PWB(1/2)

POWER

VOLTAGE

ERROR

POWER SW

REG

FEEDBACK

AMP

(No.YA476)2-5

2-6(No.YA476)

Image 48

Contents AV-29MXP6/V Items Contents AV-21MXP6/V AV-25MXP6/V AV-29MXP6/VSafety Precautions Leakage Current CheckAlternate Check Method No.YA4761-3Features DVD Picture Mode Auto Signal DetectPicture Mode Cinema SurroundTechninal Information Main MI-COM CPU PIN Function No.YA4761-5Disassembly Procedure AV-21MXP6/V Removing the Rear Cover Wire Clamping and Cable TyingRemoving the Main PW Board Removing the SpeakerAV-21MXP6/X No.YA4761-7Disassembly Procedure AV-25MXP6/V Removing the Rear Cover AV-25MXP6/V No.YA4761-9Disassembly 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 shownFront Side No.YA4761-11Memory IC Replacement MenuSystem Constant Setting Settings of Factory Shipment Button OperationRemote Control Direct Operation Remote Control Menu Operation Picture SettingFeature Setting Install SettingService Mode Setting Items VSM PresetReplacement of Chip Component How to install Chip parts Resistors, capacitors, etcSoldering Iron Transistors, diodes, variable resistors, etcAdjustment Preparation Preset Setting Before AdjustmentAdjustment 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 Service Mode Items Setting MethodMemorize the Adjustment Data Release of Service ModeService Mode Flow Chart 20 No.YA476Initial Setting Value of Service Mode PAL Secam NTSC3 NTSC4 Video32 ~ +31 No.YA4761-2122 No.YA476 No.YA4761-23 AV-21MXP6/V Function Mode100Hz 300Hz 1kHz 3kHz 8kHz AV-25MXP6/V FunctionAV-29MXP6/V Function +12+11 No.YA4761-25Compress 43 50Hz Others 60HzS.CR 32 ~ +31 LIN 32 ~ +3143 50Hz 50Hz 60HzBright Soft TheaterCool Warm Normal Theater Adjustment Procedure Check Item Measuring Test point Adjustment part Description InstrumentB1 Voltage High Voltage HV voltmeterDelay Point Tuner / if CircuitAGC FocusPosition PAL V. PositionNtsc V. Position SizePAL H. Size Ntsc H. SizeSide PIN PAL Side PINLinearity PAL V. LinearityNtsc V. Linearity Corner PINBOW PAL H. BOWNtsc 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 BalanceSUB Bright SUBContrast SUB ColourSUB Tint PAL TintNtsc 3.58 Tint Ntsc 4.43 TintVSM Preset Setting STANDARD, Soft and Theater1. R Drive to 3. B Drive to the values Warm and NormalPurity and Convergence „ Purity Adjustment „ Static Convergence Adjustment „ Dynamic Convergence AdjustmentNo.YA4761-41 Indication by the Power LED Self Check Functions OutlineSelf Check Items Self Check Indicating FunctionVPT Schematic Diagrams Copyright 2006 Victor Company of Japan, LimitedSafety Indication of Parts Symbol ExampleIndications on the Circuit Diagram Specified Voltage and Waveform ValuesContents AV-21MXP6/V, AV-25MXP6/V AV-29MXP6/VMain PWB Pattern 2No.YA476Main PWB No.YA4762-32-4No.YA476Front Control PWB1/2 Main PWB Circuit Diagram AV-21MXP6/V 1/4 2/4 SHEET1 No.YA4762-72-8No.YA476Main PWB Circuit Diagram AV-21MXP6/V 3/44/4 SHEET2 No.YA4762-92-10No.YA476Main PWB Circuit Diagram AV-25MXP6/V 1/4 2/4 Sheet No.YA4762-112-12No.YA476Main PWB Circuit Diagram AV-25MXP6/V 3/44/4 SHEET4 No.YA4762-132-14No.YA476Main PWB Circuit Diagram AV-29MXP6/V 1/2 Sheet No.YA4762-152-16No.YA476Main PWB Circuit Diagram AV-29MXP6/V 2/2 Sheet No.YA4762-172-18No.YA476CRT Socket PWB Circuit Diagram AV-29MXP6/V Sheet No.YA4762-192-20No.YA476Front Control PWB Circuit Diagram AV-29MXP6/V Sheet No.YA4762-212-22No.YA476Bass PWB Circuit Diagram Sheet No.YA4762-232-24No.YA476Front No.YA4762-25 26No.YA476Main PWB Pattern AV-29MXP6/V No.YA4762-272-28No.YA476CRT Socket PWB Pattern AV-29MXP6/V Bass PWB Pattern Solder SideBass PWB Pattern Parts Side No.YA4762-292-30No.YA476Front Control PWB Pattern AV-29MXP6/V No.YA4762-312-32No.YA476Voltage Charts AV-21MXP6/V, AV-25MXP6/V No.YA4762-332-34No.YA476Waveforms AV-21MXP6/V, AV-25MXP6/V No.YA4762-3536No.YA476 Main PWBNo.YA476 Parts List No.YA4763-1Contents Using P.W. Board & Remote Control Unit No.YA4763-3100 V01 L01 101 102 106 103 105 104 T5224No.YA476 Printed Wiring Board Parts List No.YA4763-56No.YA476 No.YA4763-7 8No.YA476 No.YA4763-9 487 5 10No.YA476No.YA4763-11 V01 L01 100 101 102 106 103 105 104 12No.YA476Main P.W. Board Assy SCW-1646A-H2 No.YA4763-1314No.YA476 No.YA4763-15 16No.YA476 No.YA4763-17 18No.YA476 B Assy AV-29MXP6/VV01 L01 100 101 103 DY01 2822 3018 102 40 T522 No.YA4763-19Main P.W. Board Assy SCW-1647A-H2 20No.YA476No.YA4763-21 22No.YA476 No.YA4763-23 CRT Socket P.W. Board Assy SCW-3037A-H2 24No.YA476Bass P.W. Board Assy SCW-6003A-H2 No.YA4763-25Packing Packing Parts List Colour Television Do not allow objects or liquid into the cabinet openings Knowing your TV’s features Main featuresRemote control buttons and basic functions No. PressRemote control buttons and basic functions TV buttons and functions Front of the TVSetting up your TV Turn off the equipment including the TV before connectingSetting up your TV Basic setting for picture Picture ModeColour System Picture Setting White Balance Picture BoosterAdvanced setting for picture AI ECO Sensor ECO/ECO ModeCompress Blue BackOriginal features for picture PIPBasic setting for sound Sound ModeSound System BalanceAdvanced setting for sound AI VolumeCinema Surround EqualizerAuto Signal Detect DVD Picture ModeDVD Sound Mode DVD MenuCustomized setting VIDEO-2 Setting Display BeepTV channel presetting Auto ProgramDelete TV channel presetting CH/CC number Before connecting Additional preparationTroubleshooting Speciﬁcations AV-25MXP6Model 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.