4.9ADJUSTMENT PROCEDURE

4.9.1 CHECK ITEM

Item

Measuring

Test point

 

Adjustment part

 

 

Description

instrument

 

 

 

 

 

 

 

 

 

 

 

B1 VOLTAGE

DC voltmeter CN00B connector

 

 

 

(1)

Receive any broadcast.

[AV-21MXP6/V,

 

1-pin:TP-B1

 

 

 

(2)

Connect a DC voltmeter to 1-pin and 5-pin of CN00B

AV-25MXP6/V]

Remote

3-pin:TP-E

 

 

 

 

connector.

 

control unit

[MAIN PWB]

 

 

 

(3)

Make sure that the voltage is DC134.5V ±2.0V.

B1 VOLTAGE

DC voltmeter CN00X connector

 

 

 

(1)

Receive any broadcast.

[AV-29MXP6/V]

 

1-pin:TP-B1

 

 

 

(2)

Connect a DC voltmeter to 1-pin and 5-pin of CN00X

 

Remote

5-pin:TP-E

 

 

 

 

connector.

 

control unit

[MAIN PWB]

 

 

 

(3)

Make sure that the voltage is DC134.5V ±2.0V.

HIGH VOLTAGE HV voltmeter

CRT anode

 

 

 

(1)

Receive any broadcast.

 

 

 

 

 

 

 

(2)

Connect the earth clip of HV voltmeter to chassis

 

Remote

Chassis GND

 

 

 

 

GND.

 

control unit

 

 

 

 

 

(3)

Connect the probe of HV voltmeter to CRT anode.

 

 

 

 

 

 

 

(4)

Make sure that the voltage is table in the left.

 

MODEL

 

VOLTAGE

NOTE:

 

 

 

 

 

 

AV-21MXP6/V

28.5kV (

1.5kV)

 

• Remove the probe before removing the earth clip.

 

AV-25MXP6/V

30.5kV (

1.5kV)

 

 

 

 

AV-29MXP6/V

31.5kV (+1kV - 1.5kV)

 

 

 

IF VCO

Remote

 

 

[1.IF]

Under normal conditions, no adjustment is required.

 

control unit

 

 

1.VCO

Confirmation adjustment.

 

 

 

 

 

 

 

(1)

Select 1.IF from the SERVICE MODE.

 

 

 

 

 

 

 

(2)

Select <1.VCO>

 

 

 

 

 

 

 

(3)

Receive any broadcast.

 

 

 

 

 

 

 

(4)

Check the (Arrow) posspition between the ABOVE

 

 

 

 

 

 

 

 

REF. and BELOW REF.

 

 

 

Receiving frequency

 

 

 

IF SERVICE MENU

 

VCO (CW)

.

MHz

 

 

 

 

 

 

 

 

 

 

1. VCO

 

 

TOO HIGH

 

 

 

 

 

2. DELAY POINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ABOVE REFERENCE

 

 

 

 

 

 

JUST REFERENCE

 

 

 

 

 

 

BELOW REFERENCE

 

 

 

 

 

 

TOO LOW

 

 

 

 

 

1 : SELECT

DISPLAY : EXIT

 

 

DISPLAY : EXIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YELLOW

 

 

 

(No.YA476)1-29

Page 29
Image 29
JVC AV-29MXP6/V Adjustment Procedure Check Item, Measuring Test point Adjustment part Description Instrument, B1 Voltage

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.