4.7.2 VIDEO CIRCUIT

 

Item

Measuring

Test point

Adjustment part

 

Description

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

525i

Signal

 

 

[1. ADJUST]

(1)

Input a 525i ramp pattern from COMPONENT

A-D OFFSET

generator

 

 

S001: PREPARE

 

VIDEO INPUT terminal.

adjustment

 

 

 

 

(2)

Set VIDEO STATUS to [STANDARD].

Remote

 

 

S008: 5i CB OF

 

 

 

 

 

 

 

(3)

Set ASPECT to [FULL].

 

 

 

 

 

control unit

 

 

(525i Cb offset)

(4)

Set COLOR TEMPERATURE to [LOW].

 

 

 

 

 

 

 

 

 

S009: 5i CR OF

(5)

Select [1.ADJUST] from the SERVICE MENU.

 

 

 

 

 

 

 

 

 

(525i Cr offset)

(6)

Adjust < S001 >(PREPARE) from 000 to 008, goes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

into the [525i Cb offset] adjustment setting mode.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(7)

Adjust < S008 > (525i Cb offset) and < S009 > (525i

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cr offset) to sets the lose gap (red line, green line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and blue line) which disappears the colors at both

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ends of the center screen.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(8)

Press the [MUTING] key to memorized the set

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(9)

Repeat from (6) and (7), then check to see that both

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ends color to white.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(10)

Adjust < S001 > from 008 to 000, it change

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to the normal mode.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Disappears the color at both ends.

1125i

Signal

 

[1. ADJUST]

(1)

Input a 1125i gray scale pattern from COMPONENT

BRIGHTNESS

generator

 

S001:PREPARE

 

VIDEO INPUT terminal.

adjustment

Remote

 

S012:HD BL

(2)

Set VIDEO STATUS to [STANDARD].

 

 

 

(3)

Set ASPECT to [FULL].

 

 

 

(1125i brightness)

 

 

control unit

 

(4)

Set COLOR TEMPERATURE to [LOW].

 

 

 

S030:R DRIVE

 

 

 

 

 

(5)

Select [1.ADJUST] from the SERVICE MENU.

 

 

 

 

 

(Red drive)

 

 

 

 

 

(6)

Adjust < S030 > (Red drive), < S031 > (Green drive)

 

 

 

 

 

S031:G DRIVE

 

and < S032 > (Blue drive) to set the values [128].

 

 

 

 

 

(Green drive)

(7)

Adjust < S001 > (PREPARE) from 000 to 012,

 

 

 

 

 

S032:B DRIVE

 

it goes to [A/D offset] adjustment mode.

 

 

 

 

 

(8)

Adjust < S012 > (HDBL) to set the 0% black part in

 

 

 

 

 

(Blue drive)

 

 

 

 

 

 

the upper half of the screen to be largest.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(9)

Press the [MUTING] key to memorized the set

 

 

 

 

 

 

 

 

 

value.

 

 

 

 

 

 

 

 

(10)

Adjust < S001 > from 012 to 000, it change

 

 

 

 

 

 

 

 

 

to the normal mode.

Adjust the white area of 0% part largest.

<AD offset adjustment mode>

(No.YA092B)1-31

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JVC HD-52Z575 service manual Offset, 1125i, Brightness, AD offset adjustment mode
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HD-52Z575 specifications

The JVC HD-52Z575, HD-61Z585, HD-61Z575, and HD-52Z585 are high-definition rear-projection televisions that were part of JVC's impressive line-up in the early 2000s. These models showcased the brand's commitment to providing quality home theater experiences with advanced features and technologies.

One of the standout characteristics of these models is their use of D-ILA (Direct-Drive Image Light Amplifier) technology. D-ILA is a type of liquid crystal display technology similar to LCoS (Liquid Crystal on Silicon) that enhances picture quality by delivering deeper blacks and more vibrant colors. This technology enables the TVs to produce stunning visuals with impressive contrast ratios, making them ideal for various viewing environments.

These models are available in different screen sizes, with HD-52Z575 and HD-52Z585 featuring 52-inch screens, while the HD-61Z585 and HD-61Z575 boast larger 61-inch displays. This range offers versatility for consumers, catering to different room sizes and viewing preferences.

All four models support 1080p resolution, providing an exceptional level of detail and clarity for HD content. This feature makes them suitable for viewing high-definition broadcasts, Blu-ray films, and gaming, allowing users to immerse themselves in their favorite content. The screens also feature a wide viewing angle, ensuring that everyone in the room gets a good view without compromising picture quality.

Connectivity is another strength of these JVC models. Equipped with multiple HDMI ports, component video inputs, and composite inputs, these televisions provide compatibility with a wide range of devices, from gaming consoles to DVD players. Users can easily connect their favorite devices, expanding their entertainment options.

In terms of audio, these JVC TVs are built to complement their visual capabilities, featuring integrated speakers that deliver decent sound quality for everyday use. For those who seek an enhanced audio experience, they offer optical digital audio outputs for external sound systems.

In conclusion, the JVC HD-52Z575, HD-61Z585, HD-61Z575, and HD-52Z585 are notable for their advanced display technologies, high-definition resolutions, and versatile connectivity options. Their D-ILA technology ensures a superior viewing experience, making these rear-projection TVs a compelling choice for any home theater enthusiast looking to enjoy high-quality visuals and sound. Although released in the early 2000s, these models remain a testament to JVC's dedication to innovation and excellence in the television market.
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