JVC HD-ILA Service Manual

HD-ILA

HDILA Update

HD--

--HD

HD--

--HD

HD--

--HD

XXG786

XXFH96

XXG787

In this course, we will address the differences

In this course, we will address the differences

between the model numbers on this slide.

Obviously, the XX in the model numbers is the

variable for screen sizes of 52, 56, 61 and 70

Table Of Contents

New Features

New Features

Difference of V0 System and

Difference of V0 System and

V1 System

Iris Aperture Control

Iris Aperture Control

HD--

HD Screen Door Effect

Gamma Correction

Lamp 5 Aspect Adjustment ATSC

ILA Projection Lens

Screen Door Effect

Gamma Correction

Lamp

TH

5

Generation D.I.S.T

Aspect Adjustment ATSC

Cooling System

Cooling System

HD--

HD

HD--

HD

HD--

HD

Differences

Differences

McAllen Magic Writer Jig

McAllen Magic Writer Jig

(MMWJ)

Tech Reports

Tech Reports

Core returns

Core returns

56G786

56FH96

56G787

HD-ILA

New Feature

New Optical System

( carry from 2005 )

GENESSA

( carry from 2005 )

MaxxBass

New design system

ILA

9

Only some models

The new models for 2006 have a new optical

The new models for 2006 have a new optical

system which we will discuss later. The new

models are also employing a new

Some of the new models will contain a new

feature for the audio called

MaxxBass..

MaxxBass

genessa

IC.

V1 System Outline (1)

Difference of V0 System and V1 System

Difference of V0 System and V1 System

Light Path <Turn / Straight>

Light Path <Turn / Straight>

Iris Aperture Control

Iris Aperture Control

Cooling System

Cooling System

(only some models)

The new models ending in

The new models ending in

the light path straight verses a turn as used in

previous models. Some of the new models will

also use a Iris aperture control which can be

used when selecting the video status button.

The cooling system for the lamp and internal

parts of the OP have also been improved.

HD--

HD

XXGX

87

have

Iris Aperture Control (1)

Before use

Before use

Set brightness darkly

<ILA device’s dynamic range> : Use lower side only

<Picture's bit depth> : Becomes shallow

Slant of brightness is not smooth

s improved by ““

ItIt’’s improved by

“

Iris Aperture Control

“

Iris Aperture Control

”

Iris Aperture Control””

Iris Aperture Control

Before the use of the Iris aperture control there was noticeable

Before the use of the Iris aperture control there was noticeable

brightness indications in the picture as shown in this slide. No

the addition of the Iris aperture we can adjust the video status

improve the quality of the brightness.

Optical iris

Optical iris



•

Dark shading improvement



•

Dark shading improvement



•

Dark gray scale improvement



•

Dark gray scale improvement

w with

to

Previously, if the Brightness Control was used to adjust the pic

Previously, if the Brightness Control was used to adjust the pic

which is how the Video Status Button on earlier models functione

would limit the

shown in the right photo would be reduced and had the effect of

showing defined STEPS in the brightness of a contoured object su

as in this picture of a bottle

not smooth).

Now with the addition of the Iris aperture we can adjust the vid

Now with the addition of the Iris aperture we can adjust the vid

status to improve the quality of the brightness.

ILA

’

ILA

overall dynamic range, the Picture Bit Depth as

’

ssoverall dynamic range, the Picture Bit Depth as

’

s rounded shape (

’

s rounded shape (

“

slant of brightness

“

slant of brightness

ture,

d, it

ch

eo

Iris Aperture Control (2)

Iris Aperture

Iris Aperture

Choice

IMPORTANT:

"PICTURE ADJUST“ not related Aperture.

“

VIDEO STATUS

“

VIDEO STATUS

”

Aperture controls Light value.

”

ÆÆAperture controls Light value.

(Three phases)

: MIDDLE

: OPEN

: CLOSE

: MIDDLE

“CLOSE” phase picture

SERVO MOTER makes noise

The iris aperture controls the light value or amount

The iris aperture controls the light value or amount

of light when pressing the video status button on

the remote control. When in the theater mode the

iris is closed and the least amount of light is

permitted. When in the dynamic mode the iris is

open and the most light is permitted. During the

standard and game setting the iris is set to the

middle position. The iris aperture is opened and

closed by a servo motor which can be heard when

pressing the video status form one setting to

another. The picture adjust in the main menu does

not control the iris aperture and are not related.

Optical Iris

Highest Accuracy Black Level Reproduction

Highest Accuracy Black Level Reproduction

Ideal for

Ideal for

Standard

Brightness Level

“

Theater Light Level

“

Theater Light Level

Dynamic

Theater

Input Level

Rough

Step

Lower Black Level

Iris Open

(100%)

”

Viewing Environments

”

Viewing Environments

Dynamic

Standard

Theater

Iris Open

Iris 75%

Iris 50%

Contrast

Iris Closed

(50%)

Higher

Contrast

Ratio

Smooth

Step

In this slide you can view what the iris aperture

In this slide you can view what the iris aperture

would look like when it is in the closed and

open position. The graph shows the input level

verses the brightness level. As you can notice

that the contrast has a higher ratio and

smoother step as it changes to lower black

levels when in the theater mode. The iris

aperture is 50% closed.

Iris Aperture Control (3)

Object Models

Object Models

Model Names

56FH96

HDHD--56FH96

61FH96

HDHD--61FH96

70FH96

HDHD--70FH96

52G787, HD--

HDHD--52G787, HD

56G787, HD--

HDHD--56G787, HD

61G787, HD--

HDHD--61G787, HD

Circuit

Circuit

52G887

56G887

61G887

P.W.B ASS'Y

Name: IRIS P.W.B.

No. : SRA--

No. : SRA

Name: IRIS P.W.B.

No. : SRA--

No. : SRA

8301A--M2M2

8301A

83022

830

AA--M2

M2

Iris

OPTICAL/DRIVE ASSY

Include

The FH96 models employ the iris PWB SRA--

The FH96 models employ the iris PWB SRA

8301A--

8301A

8302A--

8302A

interchangeable. These are the only models

that have iris aperture feature. Future models

will also employ this feature. The iris aperture

is controlled by the main drive PWB and is

mounted on top the main drive PWB.

M2 and the G787/G887 use the SRA--

M2 and the G787/G887 use the SRA

M2. these boards are not

1080P HD-ILA Projection Lens

Newly Developed for

Newly Developed for

1080P Displays

Eleven Separate

Eleven Separate

Glass Components

One Aspheric

One Aspheric

Resin Coated Lens

Anti--

Anti

on Each Lens Element

Reflective Coating

Optical Lens improvement

Optical Lens improvement



•



 The new projection lens developed to display in

Peripheral resolution performance

•

Peripheral resolution performance

•

Brightness improvement

•

Brightness improvement

•

Chromatic aberration improvement

•

Chromatic aberration improvement

The new projection lens developed to display in 1080P have eleven separate glass components.

1080P have eleven separate glass components.

Each lens element is coated with anti--

Each lens element is coated with anti

coating to reduce unwanted reflections (screen door

effect). We will discuss this effect in a future slide.

reflective

1080P HD--

1080P HD

1080P Displays have

1080P Displays have

2 Million Pixels per chip

With 1080P displays, it is possible to

enjoy 1080i content at full 1080 x 1920

resolution.

720P Displays have only

720P Displays have only

1 Million Pixels per chip

With 720P displays, it is necessary to

scale popular 1080i content to the

lower

720 x 1280 resolution.

ILA

This slide is presented to introduce you to the differences betw

This slide is presented to introduce you to the differences betw

used in previous models, and the new 1080P chip used, for exampl

models.

Three Chip System

Three Chip System

Three Chips are

better than one.

Reflective Design

Reflective Design

Reflective is

better than

transmissive..

transmissive

No Mechanical

No Mechanical

Color Wheel

All Digital, Direct Drive

No Moving Parts in

the Optical Engine Path

No

“

No

Simultaneous Display of Red, Green, & Blue

Fatigue

No Visible

93% Efficient

Rainbow

“

Rainbow

No Single--

No Single

Electro--

Electro

Micro Mirror

Simultaneous Display of Red, Green, & Blue Color Channels for Film--

Color Channels for Film

Fatigue--

No Visible

“

Screen Door Effect

“

Screen Door Effect

93% Efficient

Highest Brightness

Excellent Contrast, with

Linear Grayscale

Realistic

”

Effect

”

Effect

Chip,

Mechanical

“

Rainbow

”

“

Rainbow

Free Extended Viewing

“

shadow detail

“

shadow detail

Artifacts

”

Artifacts

Like Images at All Times

”

een the 720 resolution chip

e, in the HD--

e, in the HD

56FH96

1080P HD-ILA

Horizontal Resolution 1920

2,073,000 Pixels x 3 !!

HD-ILA

1080p Chip

Vertical Resolution 1080

10.1 Mega pixels per sq. in.

Vertical alignment of

Vertical alignment of

liquid crystal layer for

highest contrast

High aperture ratio

High aperture ratio

& high light efficiency

The 1080P HD--

The 1080P HD

for red, blue and green devices, effectively producing

6,219,000 total pixels to produce the picture.

The measurement of each chip is:

The measurement of each chip is:

As described in previous classes, the LCD material in

As described in previous classes, the LCD material in

these chips is VERTICLLY aligned in a configuration much

like individual threads and when viewed under a

microscope, resemble that threaded description in that

they are in a vertical, spiral shape.

Arranging the LCD material in this fashion provides a high

Arranging the LCD material in this fashion provides a high

aperture ratio that has the effect of blocking a minimum

amount of the entering and reflected light and gives a

very high, 93% efficient use of available light from the high

powered lamp in the Light Engine.

ILA chips have over 2 million pixels each

Screen Door Effect

With LCD

With HD-ILA

With

With

the light source is BEHIND the picture producing

element. This is typical of LCD television and Thin

Film Transistor computer screens. The screen door

effect is a result of the shadowing of the pixel

separations and of the driving devices (transistors)

that are required to activate each pixel of an LCD

screen. The shadowing pixel walls, appearing as

though you are looking through a screen door, and

the driving transistors block light giving the

perception of reduced brightness.

Transmissive

technology such as shown here,

GENESSA

Gamma Correction

Gamma Correction

Gamma characteristics is fixed. Therefore, dark and bright area

Gamma characteristics is fixed. Therefore, dark and bright area

lost by contents of an picture.

Gamma characteristics is variable. DGC preserves dark and bright

Gamma characteristics is variable. DGC preserves dark and bright

details.

What “Gamma”? Originally, Gamma means “Cam Inverse Gamma / CRT Gamma”. Now, “Gamma Correction” means display devices correction.

(or Control )

details are

characteristic

area

What is

This term was originally used as a standard for producing the co

images received by a camera, the correct color temperature being

Originally, Gamma means

The camera is a picture producing device. The ILA can be consid

producing device. This can be compared to a musical instrument

device, and an amplifier and speaker as the music re--

device, and an amplifier and speaker as the music re

In order for the two to match sound from production to reproduct

must be kept. In video, the most critical standard is GAMMA.

In the ILA, the GAMMA is designed to be kept at 6500 degrees Kel

temperature must be observed from full black (crushed) to satura

black to full white is measured in IRE units (Institute of Radi

black to full white is measured in IRE units (Institute of Radio

the form of a non--

the form of a non

representation of value X for red and value Y for blue, with gre

meeting point.

In older systems, Gamma Correction was a fixed setting and detai

sacrificed for overall correct color temperature.

DGC or Dynamic Gamma Correction is an active constant monitoring

corrections are made automatically, depending on picture content

temperature is achieved. DGC samples areas of the picture from

makes corrections to that particular section of the picture

Now,

“

Gamma Correction (Gamma Control )

“

Gamma Correction (Gamma Control )

“

Cam Inverse Gamma / CRT Gamma

“

Cam Inverse Gamma / CRT Gamma

linear curve tracking from these two conditions and is a vector

“

Gamma Correction

“

Gamma Correction

”

means display devices characteristic correction.

”

means display devices characteristic correction.

”

?

”

?

producing device.

rrect color temperature with

3500 degrees Kelvin.

”

.

”

.

ered a picture re--

ered a picture re

being a music producing

ion, certain standards

vin. This color

tion (full white). This full

o

Engineers standard). It takes

en being the standard the

ling of the picture was

so that a constant color

black to full bright and

–

actively and constantly.

–

actively and constantly.

of this vector and

Dynamic Gamma Control

Dynamic Gamma Control

Dynamic Gamma Control

Examine distribution of brightness of each pixel.

1)1)Examine distribution of brightness of each pixel.

Concentrated band have heavy Information.

2)2)Concentrated band have heavy Information.

Emphasize detail of Concentrated band

3)3)Emphasize detail of Concentrated band

Even if there are plural concentrated bands, DGC functions.

4)4)Even if there are plural concentrated bands, DGC functions.

It is controlled for a picture change so that correction does not t

5)5)It is controlled for a picture change so that correction does no

become unnatural

Input range

GENESSA correct a image every frame.

Correcting method

Correcting method

Dynamic Gamma Control

zzDynamic Gamma Control

Color Management

zzColor Management

CPU supports

correcting

and handles it

fast.

Color Management

Color Management

Color Management

Color Management works as follows.

Found

1)1)Found

Chroma and brightness levels gain, only

2)2)Chroma and brightness levels gain, only

lower a level of the whole the picture equally, in the range tha

3)3)lower a level of the whole the picture equally, in the range tha

can display.

4)

“

5 point color's are emphasized, and see the picture very well.

4)

“

5 point color's are emphasized, and see the picture very well.

“

5 point color

“

5 point color

Point 1 : green Point 2 : yellow Point 3 : red Point 4 : blue Point 5 : flesh tones

”

in the picture.

”

in the picture.

“

5 point color

“

5 point color

”

.

”

.

t a device

Better Gradation & Color Reproduction

Adjusts gradation and

color reproduction for

the best possible

picture by constantly

monitoring the picture

Intelligent Gamma

Clearer image of boat and face

Higher Contrast

Picture Processor (32bit CPU)

Analyzes the picture data

Color Creation

Flowers and boat with vivid colors

Better Color Reproduction

Improved Performance for Optimum Picture Quality...



•

Adds an extra axis to color management circuit for



•

Adds an extra axis to color management circuit for

improved color reproduction of skin tones



•

Local sampling process targets specific color



•

Local sampling process targets specific color

regions

Adding color management and dynamic effects

Adding color management and dynamic effects

together, the

enhancement of the details of dark areas with

Dynamic Gamma Correction (middle photo

the water and other items that would normally not

be seen), and peaks otherwise washed out colors

(rightmost picture), both functions being a part of

the 32 bit Picture Processor CPU.

Genessa

system makes an

–

look at

–

look at

Lamp

Lamp Life:

Lamp Life:

Approximately*

7,500 Hours

User Replaceable

Sealed Optical Engine

Sealed Optical Engine

No Dust Filter to Clean

Low Noise Cooling Fans

Low Noise Cooling Fans

for Quiet Operation

1.5db Quieter Than Original HD--

--1.5db Quieter Than Original HD

ILA

* Can Vary Based on Actual Usage

The new and improved lamps can be identified by the serial numbe

The new and improved lamps can be identified by the serial numbe

can seen if you look at the side opening towards the front of th

The new and improved lamps can be identified by the serial numbe

The new and improved lamps can be identified by the serial numbe

can seen if you look at the side opening towards the front of th

The 2004 model sets had an expected lamp life of 4000 hours. Th

The 2004 model sets had an expected lamp life of 4000 hours. Th

lamps that are in the G and FH model sets have an expected life

These new and improved lamps can be identified by the serial num

which can seen if you look at the side opening towards the front

Please keep in mind that the life of any lamp is determined by t

usage methods, and habits of the customer. The average HD TV us

TV 4 to six hours a day, usually around prime--

TV 4 to six hours a day, usually around prime



The cooling system for the ILA unit in the Light Engine is a clo



The cooling system for the ILA unit in the Light Engine is a clo

meaning it draws in no outside air and therefore needs no dust f

Newer, lower noise cooling fans are used in our new models for q

Newer, lower noise cooling fans are used in our new models for q

operation of at least --

operation of at least

meter of the front of the set in a dead sound room.

1.5db below the original 23db standard measured from 1

time.

e lamp.

he installation,

sed--

sed

ilter.

r 5E23 which

e improved

of 7500 hours.

ber 5E23

of the lamp.

er watches

loop system,

uieter

/

History of D.I.S.T.

Generation

st

1

nd

2

rd

3

th

4

th

5

Year

2001

2002

2003

2004

2005

Put scaling chip

together and made

Designed color management chip

“

JCC5055

“

JCC5055

PAL signal support and g

“

JCC5056

“

JCC5056

performance up. It is

JCC5055 + JCC5057 +

“

AMDP2

“

AMDP2

”

integrated

”

integrated

”

included

”

included

”

and new chip

”

and new chip

“

D.I.S.T.

“

D.I.S.T.

”

.

”

.

AMD2

color/brightness control function, and

“

with

lobal

use.

lobal

use.

JCC5057 (Genessa)

“

Y/C Sep.

“

Y/C Sep.

“

JCC5056

“

JCC5056

JCC5054.

”

+

“

Video Decode

”

+

“

Video Decode

= JCC5060 (

JCC5054 (for DSD)

”

for flat device.

”

for flat device.

”

.

”

.

”

α

”

+ + α

JCC5068 )

”

This slide indicates the five generations of D.I.S.T. IC

This slide indicates the five generations of D.I.S.T. IC

used in previous models up to today.

It merchandises enhancing the programmable image

It merchandises enhancing the programmable image

processing LSI AMDP2 and the new development which

’

s

’

s

have been used for one for SD--

have been used for one for SD

processing LSI JCC5054 as "DET". Developing the

integration revision LSI for flat panel JCC5056.

Actualizing the color reappearance revision with DCC.

The makers of AMDP2 and JCC5054 also develop the

JCC5055 which is used for the PAL signal correspond,

entire world developments. The brightness･･

entire world developments. The brightness

the integration revision LSI for flat panel which JCC5057

z taking in is done (GENESSA) it develops as the

succession device of JCC5056.

ILA (DSD) combining

color

tone are

GENESSA Chip

GENESSA Chip <1st> JCC5057

GENESSA Chip <2nd> JCC5060

GENESSA Chip <2ndplus> JCC5068

5thD.I.S.T. w/ GENESSA

This slide shows how HD Component video is processed

This slide shows how HD Component video is processed

in the JCC5060/JCC5068. The JCC5068 incorporates

all AD conversion in the A/D converter shown inside the

black lines. The JCC5060 did not have this circuit, but

instead, used a simpler A/D converter that is shown at

the bottom left of the drawing and is marked with an

asterisk (*). HD component video signal, JCC5060 A/D

converter

It has been improved in the JCC5068 version of the chip.

It has been improved in the JCC5068 version of the chip.

It is only time to use for HD component video signal,

It is only time to use for HD component video signal,

JCC5060 A/D converter

It is improved with JCC5068.

It is improved with JCC5068.

’

s characteristic was not good.

’

s characteristic was not good.

’

s characteristic is not good.

’

s characteristic is not good.

TH

5

Generation D.I.S.T.

High Performance Scaler

Current New

Reduced Jaggies

Intelligent Noise Reduction

Noise reduction Noise detected in image

is controlled,

automatically

New 3D Y/C with Component Cross Color Elimination

Cross color &

dot interference

Reduced

cross color &

dot interference

Analysis area

The improved performance of the DIST or SCALER is

The improved performance of the DIST or SCALER is

designed to reduce the

serrated lines on the edges of images and transitions of

color.

sampling of a solid color area where there is presently no

motion (MPEG noise) and uses that sample for

comparison and noise reduction in the entire picture. The

new version 3D Y/C filter is used to reduce or eliminate

“

Cross Color

“

Cross Color

patterns like hound--

patterns like hound

presented.

The new DIST also uses an advance de--

The new DIST also uses an advance de

system that makes a 1080i signal smoother when passed

through the 1080p native conversion.

Intelegent

”

seen as

”

seen as

Noise Reduction is accomplished by a

“

jaggies

“

jaggies

Chroma

stooth

”

or what looks like

”

or what looks like

shimmering when complex

jackets or fine print shirts ate

interlacing

HD Aspect Adjustment

HD PANORAMA:

Zooms in slightly, but does not distort the center of the image

Slightly stretches the outer edges to eliminate side bars and pr

images across the screen

CINEMA ZOOM:

Zooms HD 16:9 images, eliminating any remaining "letter box"

Original HD Picture

Original HD Picture HD Cinema Zoom

HD Panorama

ovide full

With respect to aspect ratios, this slide indicates the

With respect to aspect ratios, this slide indicates the

effect of altering a standard 4x3 aspect ratio by

manipulating the Aspect Ratio button on the remote. As

shown in this slide, there is obvious distortion of the

outer left and right areas of the picture using HD

PANORAMA, but it does eliminate the Pillar Bars normally

seen with 4x3 aspect ratio viewing. The use of CINEMA

ZOOM eliminates most LETTERBOX presentations,

reducing or eliminating the dark margins created by the

use of this type of display. If a true HD signal is being

received (720p, 1080i), there are only three choices of

aspect ratio: FULL, HD PANORAMA, and CINEMA

ZOOM. If an original 4x3 picture is displayed, NORMAL

will be included in the choices for aspect ratio.

ATSC

DTT Standard

Digital Terrestrial Television Standard

Digital Terrestrial Television Standard

ATSC

U.S.A. , Canada

Area

U.S.A. , Canada

Korea, and other

Modulation

Video

Compression

Audio

Compression

Advantage

Disadvantage

rganizerr

OOrganize

8VSB

MPEG--22

MPEG

MPEG--

2 AC--33

MPEG

2 AC

Low

level electric field

Low

level electric field

Low cost (8VSB)

Multi--

path

Multi

path

Mobile--

receive

Mobile

receive

ATSC

TERMS ON THIS SLIDE:

TERMS ON THIS SLIDE:

OFDM =

OFDM =

digital

then transmitted simultaneously at different frequencies to the

signal transmissions.

MPEG = Motion Pictures Entertainment Group. A method of compres

MPEG = Motion Pictures Entertainment Group. A method of compres

without a perceptible loss of information or causing

MPEG--

MPEG

8VSB =

8VSB =

digital television

ATSC, 8VSB carries 19.39Mb (

significantly higher due to the addition of

the use of a

intended to be used for ATSC

standard instead.)

SFN = Single Frequency Network.

SFN = Single Frequency Network.

DVB = Digital Video Broadcasting

DVB = Digital Video Broadcasting

ARIB = The

ARIB = The

organization

designated frequency change support agency.

ACAC--3 = Dolby Digital, or

for normal--

for normal

or

subwoofer

or

AAC =

AAC =

form, is a

MPEG group

and

BC = UNKNOWN (Broadcast, maybe??

BC = UNKNOWN (Broadcast, maybe??

By a document, OFDM can be written as COFDM. This is the same th

By a document, OFDM can be written as COFDM. This is the same th

By a document, OFDM can be written as COFDM. This is the same th

By a document, OFDM can be written as COFDM. This is the same th

rthogonal FF

OOrthogonal

data

over a

data

over a

4 is 200 to 1 compression ratio.

8VSB

trellis encoder

Association of Radio Industries and Businesses

in

3 = Dolby Digital, or ACAC--33

range speakers (Right front, Center, Left Front, Right Rear and

subwoofer

Nokia..

Nokia

. The Dolby Digital format supports

Advanced Audio Coding((

Advanced Audio Coding

digital audio

by the end of April 1997. It was developed with contributions by y

by the end of April 1997. It was developed with contributions b

requency DD

requency

radio

wave. OFDM works by splitting the radio signal into multiple sm

radio

wave. OFDM works by splitting the radio signal into multiple sm

802.11a

is the

Japan

level

88--level

standard in the

. There are also the similar modulations

. ARIB is designated as the center of promotion of the efficient

encoding and

ivision MM

ivision

WLAN

vestigial sideband modulation

United States

megabits

digital cable

, is the common version containing up to 6 total channels of sou

AAC

ultiplexing

, 802.16 and

) of usable data per second, although the actual transmitted

forward error correction

, but

), also known as

lossy

compression

lossy

compression

, an

WiMAX

artifacting

and

Canada

and

Canada

quadrature

Mono

MPEG--

MPEG

FDM

modulation

FDM

modulation

receiver. OFDM reduces the amount of

technologies

in the picture. MPEG--

in the picture. MPEG

method adopted for terrestrial broadcast of the

. (In the 6MHz (

codes. The eight signal levels are selected with

2VSB, ,

2VSB

amplitude modulation

, commonly known as

and

Stereo

and

format

usages as well.

Stereo

usages as well.

2 Part 7

. AAC was declared an international standard by

technique for transmitting large amounts of

use OFDM.

sing a raw digital video and audio signal

megahertz

4VSB

Left Rear) and one channel for the

, and also

Dolby, ,

Dolby

ing.

aller sub--

aller sub

2 is 50 to 1 compression,

) channel used for broadcast

, and

16VSB

, and

16VSB

(QAM) has become the industry

ARIB

, is a

ARIB

, is a

use of the radio spectrum and

MPEG--

4 Part 3

MPEG

4 Part 3

Fraunhofer((

Fraunhofer

signals that are

crosstalk

ATSC

bit rate

. 16VSB was notably

standardization

nd, with 5 channels

in a slightly modified

FhG

),

AT&T, ,

FhG

),

AT&T

is

in

LFE, ,

LFE

the

Sony

Program

Related ES (or PES) group.

Common System outline

This is a slide showing the various processes

This is a slide showing the various processes

that are used to prepare the ATSC

programming for transmission. This is

ENCODING of the signal. The receiver end

must do the DECODING.

PSI =

PSI =

PMT = Program Map Table

PMT = Program Map Table

PAT = Program Association Table

PAT = Program Association Table

Program Specific Information

DTT Map

Digital Terrestrial Television Map

Digital Terrestrial Television Map

There are seven basic different terrestrial

There are seven basic different terrestrial

television transmission systems. Their

distribution is shown on this map downloaded

from the Digital Video Broadcasting web site.

The USA, Mexico, Canada, and Northern

The USA, Mexico, Canada, and Northern

Territories in green have either already adopted

or are considering and testing the ATSC

system. All others are Digital Video Broadcast

except for Japan in red that uses Integrated

Services Digital Broadcasting.

Modulation section

In ATSC, 8VSB Modulation system use.

(8VSB : 8 level Vestigial Side Band)

ATI chip

JVC use

DCR tuner

Without DCR tuner

ATI

designed ATSC chips.

ATI

designed ATSC chips.

DCR tuner

Without DCR tuner

use

NXT2003

use

™

and

Xilleon

™

THEATER

™

310

226 . .

226

and

Xilleon

™

226 ..

226

DCR = Digital Cable Ready

DCR = Digital Cable Ready

ATI = A manufacturer of Video Graphics Cards

ATI = A manufacturer of Video Graphics Cards

mostly used in computers.

This slide shows the different ATI designed

This slide shows the different ATI designed

chips based on use of a Digital Cable Ready

tuner or non--

tuner or non

use of one.

DTV Tuner Chip Maker

JVC

JVC

’

Main Chip maker

s DTV tuner units / main chip makers table

for ATSC

ATI

for DVB--TT

for DVB

ST

for ISDB--TT

for ISDB

TOSHIBA

ATSC = Advanced Television Systems

ATSC = Advanced Television Systems

Committee

ISDB--

ISDB

Broadcasting. The

DVB--

DVB

Terrestrial

T = Integrated Services Digital

T = Digital Video Broadcasting --

T = Digital Video Broadcasting

–

T is for Terrestrial

–

T is for Terrestrial

Cooling System (1)

INTERNAL AIR FLOW [Removing DRIVE PWB]

The cooling block in optics engine and the projection space between projection lens and screen are airtight structure.

This is structure which prevents dust go into the optics engine.

This slide deals with

This slide deals with

circulation system that is used to cool the ILA

block in the optical section of the Light Engine.

This closed system has no need for filtering

since there is no outside air taken into the unit

when chassis and cabinet are assembled.

The temperature sensor is located inside the

The temperature sensor is located inside the

large exhaust port on the right of the chassis

shown here.

JVC

’

closed--

’

ssclosed

loop air

Cooling System (2)

LAMP BLOCK AIR FLOW [Removing Lamp unit and Duct]

The air ventilates the lamp unit after cooling the lamp ballast and go out of the TV.

The sirocco cooling fan send air to the lamp unit to prompts cooling the lamp block.

The lamp block is partitioned with the internal airflow block by the UV/IR filter and each air flow does not intersect.

The new type cooling system for Lamp and

The new type cooling system for Lamp and

Ballast are shown here. The lamp now has dual

cooling due to the configuration of the Sirocco

(drum) fan located on top of the lamp cavity

that blows down on the bell of the lamp, and

the larger fan sandwiched between the ballast

assembly and lamp cavity. The Optical Block is

isolated from these fans by virtue of the U/V

filter glass at the light--

filter glass at the light

Engine.

entry end of the Light

HD-56G786

This is the wiring diagram associated with the

This is the wiring diagram associated with the

models HD--

models HD

It is similar to the diagram for the 2004 models

of HD--

of HD

the ATSC tuner and fan, and the SD Card

reader.

XXZ575 and 585 with the exception of

61Z786, 70G886, and HD56G786.

This is the block diagram and signal flow of the

This is the block diagram and signal flow of the

models we are discussing. (HD--

models we are discussing. (HD

70G886, and HD56G786). Please note the

signal flow of the added components, that is

the ATSC tuner and new rear panel inputs and

outputs, 15 pin D--

outputs, 15 pin D

Sub computer, etc.

61Z786,

Signal Flow

This slide is to assist you with the NTSC and

This slide is to assist you with the NTSC and

ATSC signal flow.

PWB For G886 and G786

This is the Circuit Board list for the G886 and

This is the Circuit Board list for the G886 and

G786 models. It is important to note that all

boards are the same EXCEPT for the Digital

Signal Boards. They are unique to each

different model and should NOT be

interchanged unless a sub is specifically

indicated through the parts system.

HD-ILA

2

Video Path HD-XXGX86

Video Inputs

1

1. RF input

2. Input 1~4 (V and YC)

3. Digital (HDMI)

4. ATSC input

4

3

In this diagram, using the numbers of the inputs

In this diagram, using the numbers of the inputs

that correspond to the numbers at the various

location, the input paths and condition

descriptions are called out as you trace each

one.

HD-ILA

Control Path HD-XXGX86

CN311

CN307

CN306

CN310

CN801

Fan

Contro

l

Fan

AC in

Therm

ostat

Lamp

Thermal

Interlock

Fan

Sens

SW

Remote

Side

PWB

CN00SW

Front LED

PWB

Terminal

PWB

ATSC Tuner

Module

CN1502 CN9601 CN1302

CN9701

Fan

CN00FL

Remote in

CN10SW

Pwr ON

Receiver PWB

Tuner

CN10FL

CN100F

CN00F

Analog PWB

CN1001

SD Card

PWB

Function

CN00G

CN100R

CN10FC

CN001

CN90G

Power

PWB

CN100C

REGULATOR

Power Control

CN0FC

CN001

Digital

PWB

CN005

HDMI

1

DD comm.

HDMI

2

CN90BCN20B

CN305

CN90G

Power

PWB

CN90BL

DD

PWB

Fan

CN101

Ballast

CN102

1. Standby 5V from PS powers CPU

2. Power on from Remote or Front panel

3. CPU turns on the power. All circuits are powered up

4. CPU checks thermal sensor, interlock switch, fan, etc. If OK, then turns on the lamp

This slide indicates the paths of the control

This slide indicates the paths of the control

signals that are used in the operation of the

ILA unit. The paths include those input from

the remote hand unit, the front panel operation

of the power on command, functions of the

side control panel, and the subsequent calls

from the microprocessor that manage

switching, monitoring and control functions for

fan control, interlock monitoring and thermal

sensor status.

HD-ILA

Power Block Diagram

HD-XXGX86

In this discussion of the POWER system, we will go over some ste

In this discussion of the POWER system, we will go over some ste

troubleshooting in an attempt to assist you in more efficient pr

resolution. This chart was made with convenience of measurement

very good troubleshooting tool.

Starting at the top left of the diagram, the AC power from the w

Starting at the top left of the diagram, the AC power from the w

There is a temperature sensitive thermostat mounted on the lamp.

open, AC power cannot continue through the circuits. After the

this switch, the next place to check (STEP 1) is at Diode D9111

PWB. If there is AC present, move on to STEP 2 to check for the

Standby 5 volts. The checkpoint for this voltage is at the POWE

CN90G, PIN 1. This STB5V is used the Digital Module. It also go

where it is regulated down to 3.3V by IC902. This is output on

the digital module as the CPU power.

If the STB5V is present, move to STEP 3 and find the MAIN DRIVE

If the STB5V is present, move to STEP 3 and find the MAIN DRIVE

to see that the Lamp Cover Interlock Switch is closed. The meas

CN305 PIN 2. Proper closure of the switch is indicated by a 0 V

this point.

After this condition is verified as correct, move on to STEP 4 c

After this condition is verified as correct, move on to STEP 4 c

signal at CN90G, PIN 3. This HIGH from the Digital Module CPU c

RY9201 and allows the AC voltage to progress through a resistor

p by step

oblem discovery and

all outlet is applied.

AC passes through

on the power supply

R SUPPLY PWB,

es to the analog board

CN001 pins 28 & 29 to

urement point is

DC measurement at

heck for a HIGH (5v)

auses closure of

to D9201.

in mind. It is a

If this switch is

presence of the

PWB. Here, check

Further checking, move to STEP 5 by measuring the voltage at CN9

Further checking, move to STEP 5 by measuring the voltage at CN9

NOTE

GROUND, NOT CHASSIS GROUND.

voltage will read 160VDC. This will not be sufficient voltage t

and ignite the lamp, but will allow for the voltages measured fr

that feed 13.5 volts to the REGULATOR PWB that will generate 5vd

12VDCto the Analog PWB and the DIGITAL MODULE. Presence of thes

be determined by measuring (STEP 6)

CN003 PIN1

CN003 PIN1

function of the CPU on the Digital Module. This voltage is also

voltage. This check for 32VDC at CN003 PIN 1 is just a more con

check for this voltage.

CN003 PIN10

CN003 PIN10

CN003 PIN4

CN003 PIN4

CN003 PIN8

CN003 PIN8

The switched 12VDC can be measured at pin 2 of CN00D on the anal

The switched 12VDC can be measured at pin 2 of CN00D on the anal

If the above voltages are missing, move to STEP 7 and check for

If the above voltages are missing, move to STEP 7 and check for

PIN 4. This is the 13.5 volts that feeds the regulator board.

The Audio Circuits are fed by a plus and minus 15VDC. These two

The Audio Circuits are fed by a plus and minus 15VDC. These two

checked as shown in STEP 8. The checkpoints are CN90AA PIN 1 An

Please notice the dotted line from the IC9501/T9501 block. The

Please notice the dotted line from the IC9501/T9501 block. The

this block is used to energize RY9201. RY9201 closes and applie

L9201 and it

the LAMP.

! THIS IS A VOLTAGE THAT MUST BE CHECKED WITH REFERENCE TO HOT

With the POWER FACTOR CONTROL off, the

o operate the lamp ballast

om CHASSIS GROUND

32VDC This voltage is a loop through voltage used for PLL

used for TUNER

venient place to

13.5VDC checkpoint

9VDC checkpoint

5VDC checkpoint

13.5VDC at CN90B

voltages can be

18VDC generated by

s the full 380VDC via

’

s associated control circuits to operate the LAMP BALLAST and ig

’

s associated control circuits to operate the LAMP BALLAST and ig

0BL.

NOTE

0BL.

c, 9VDC and SW

NOTE

c, 9VDC and SW

e voltages can

og board.

d CN90AA PIN5.

NOTE

nite

HD-ILA

Lamp and Fan Block

HD-XXGX86

Check Standby 5V

and Power on

command

Digital

board

Lamp Cover det

Check Lamp

Cover SW

Clossed (0V)

Fan x 3

Check Fan control signal and Fan OK signal. If fan

failure is detected, CN310(3) becomes 5V. Power shuts

Fan

Control

off.

3

Control (0~1V) Fan Lock (0V)

STB5V

Main_POW

Tx Rx

CN306

2

12V

5V

AC in

CN305

CN310

6

CN90G

1

2

3

13V -9V

Main Drive

3456

1

Power

4

17

CN308

Check AC input to

the power supply

Check Lamp

Supplies. 380V

CN90BL

3

1

CN311

5

413

380V 18V

Check all supplies

and 18V (Hot

ground)

to the Main Drive

board

7

2.5V

Lamp on(2.5V)

Lamp return

OK(0V), NG(5V)

Check Lamp ON signal. 2.5 V for 4 seconds and 0V for

6 seconds. In case, no lamp return (OK) within 3 tries

(30 seconds), warning appears and power goes off

CN101

Lamp

Ballast

1 3

LAMP and FAN failures can be checked using this block diagram.

LAMP and FAN failures can be checked using this block diagram.

***POINT OUT EACH STEP AS YOU EXPLAIN IT****

***POINT OUT EACH STEP AS YOU EXPLAIN IT****

Step 1:

Step 1:

voltage there, check to see if the LAMP THERMOSTAT is OPEN.

Step 2:

Step 2:

HIGH at CN90G PIN3 on the Power Supply board.

Step 3:

Step 3:

PIN 2 on the MAIN DRIVE BOARD. Proper closure of this switch i

by a 0VDC reading.

Step 4:

Step 4:

This line connects to the Power Supply board as CN90DD.

Step 5:

Step 5:

These voltages can be found at CN90BL on the POWER SUPPLY board.

THESE 2 VOLTAGES ARE MEASURED WITH REFERENCE TO HOT GROUND,

NOT CHASSIS GROUND.

Step 6:

Step 6:

detected, the voltage at CN310 PIN 3 will be 5VDC.

Check for the presence of AC voltage at CN90SE. If there is no

Check for Standby 5 volts at CN90G PIN 1 and an operational

Check for LAMP COVER SWITCH INTERLOCK closure at CN306

s indicated

Measure for 13VDC at CN308 PIN 1 and --

Measure for 13VDC at CN308 PIN 1 and

Check the 2 supplies that provide voltage for LAMP operation.

At CN310 PIN 3 of the MAIN DRIVE BOARD, if a fan failure is

9VDC at CN308 Pin 7.

HD-ILA

Side PWB

2

Rear Jack PWB

2

5 3

A4

Line

A1~A

3

Center Ch. In

D.Aud (Analog)

Audio Path HD-XXGX86

Receiver PWB

IC

1701

A.H.S. BBE ADC AMP LPF

IC

1252

SW

AUD/CPN SW

IC

1641

1140

Vari

Fix

MTS

Analog PWB

IC501

AVSW

IC301

IC

1621

1661

IC501 IC301

A1 A2 A3 A4

Digital

PWB

D.Aud

(Digital)

HDMI

LC

IC

Filter

Tuner

HDMI(A) HDMI(D)

Center CH.

4

ATSC Tuner

1

Audio Outputs

1. Speaker output

2. Line output

IC1140

Main

S.W Line

Tuner

Audio Inputs

1. RF input

6

2. Input 1~4

3. HDMI (Analog)

4. HDMI (Digital)

5. Center CH

6. ATSC input

Using the same methods as the previous signal

Using the same methods as the previous signal

path slide showed with the video paths, the

audio signal can be traced with this diagram.

The signals to be traced are indicated in the

lower right of this slide. The outputs are

named in the upper left of the slide.

Self check mode

 Before entering the Self check mode,

confirm that the setting of TV/CATV SW of the REMOTE CONTROL UNIT is at the "TV“ side and the setting of VCR/DVD SW is at the "VCR" side.

 Set to "0 minutes" using the [SLEEP

TIMER] key.

 Press the [VIDEO STATUS] key and

[DISPLAY] key simultaneously, then enter the

service mode.

 Press the [2] key (SELF CHECK) before the

service mode screen disappears.

 Press the [SLEEP TIMER] key to enter Page

2 of the SELF CHECK MODE.

 When the [RETURN+] key pressed, the first

page change screen.

NOTE:

NOTE:

When a number key other than the

When a number key other than the

pressed in

the SERVICE MENU SCREEN, the other

the SERVICE MENU SCREEN, the other

relevant

screen may be displayed.

screen may be displayed.

This is not used in the SELF CHECK. Press the

This is not used in the SELF CHECK. Press the

[MENU]

key to return to the SERVICE MENU SCREEN.

key to return to the SERVICE MENU SCREEN.

[2]

key is

LED Error Codes for HD-XXGX86

DISPLAY METHOD WHEN RASTER IS NOT AVAILABLE

DISPLAY METHOD WHEN RASTER IS NOT AVAILABLE

In a state where a display screen does not appear due to the fai

In a state where a display screen does not appear due to the fai

of this unit, the POWER LED (blue) and LAMP LED (orange) can

light up and display a trouble mode.

light up and display a trouble mode.

The factors in case the power is forcibly shut down at the time

The factors in case the power is forcibly shut down at the time

failure are memorized and those are displayed.

EXPLANATION ON ACTION

EXPLANATION ON ACTION

If NG is detected on an item being diagnosed, turn off the power

If NG is detected on an item being diagnosed, turn off the power

this unit. As soon as the power goes off, turn on and off POWER

LED and LAMP LED immediately. After the power is shut down, it

LED and LAMP LED immediately. After the power is shut down, it

becomes impossible to turn on the power until the power cable

is either plugged in or unplugged from the AC outlet.

is either plugged in or unplugged from the AC outlet.



•

When [1] and [3] take place at the same time, give priority to



•

When [1] and [3] take place at the same time, give priority to

and [2] will not take place simultaneously with [1] and [3].

lure

of

[1],

on

Adjustments for HD-XXGX86

After the replacement of the OPTICAL

BLOCK, projection lens focus adjustment and

drive convergence/projection adjustment are

required.

HD-56FH96

FH96 has connectors labeled different form Z

FH96 has connectors labeled different form Z

and G series OP assembly has iris PWB

HD-56FH96

Signal Flow For HD-XXFH96

You can use this slide to follow the ATSC

You can use this slide to follow the ATSC

signal and the HDMI signal.

PWB For FH96

HD-ILA

Power Block Diagram

HD-XXFH96

In this discussion of the POWER system, we will go over some ste

In this discussion of the POWER system, we will go over some ste

troubleshooting in an attempt to assist you in more efficient pr

resolution. This chart was made with convenience of measurement

very good troubleshooting tool.

Starting at the top left of the diagram, the AC power from the w

Starting at the top left of the diagram, the AC power from the w

There is a temperature sensitive thermostat mounted on the lamp.

open, AC power cannot continue through the circuits. After the

this switch, the next place to check (STEP 1) is at Diode D9111

PWB. If there is AC present, move on to STEP 2 to check for the

Standby 5 volts. The checkpoint for this voltage is at the POWE

CNA2, PIN 1. This STB5V is used the Digital Module. It also goe

where it is regulated down to 3.3V by IC902. This is output on

the digital module as the CPU power.

If the STB5V is present, move to STEP 3 and find the MAIN DRIVE

If the STB5V is present, move to STEP 3 and find the MAIN DRIVE

to see that the Lamp Cover Interlock Switch is closed. The meas

CNSW PIN 2. Proper closure of the switch is indicated by a 0 VD

this point.

After this condition is verified as correct, move on to STEP 4 c

After this condition is verified as correct, move on to STEP 4 c

signal at CNA2, PIN 3. This HIGH from the Digital Module CPU ca

RY9201 and allows the AC voltage to progress through a resistor

p by step

oblem discovery and

all outlet is applied.

AC passes through

on the power supply

R SUPPLY PWB,

s to the analog board

CN011 pins 23 & 24 to

urement point is

C measurement at

heck for a HIGH (5v)

uses closure of

to D9201.

in mind. It is a

If this switch is

presence of the

PWB. Here, check

Further checking, move to STEP 5 by measuring the voltage at CNB

Further checking, move to STEP 5 by measuring the voltage at CNB

NOTE

GROUND, NOT CHASSIS GROUND.

voltage will read 160VDC. This will not be sufficient voltage t

and ignite the lamp, but will allow for the voltages measured fr

that feed 13.5 volts to the POWER SUPPLY PWB that will generate

SW 12VDCto the Analog PWB and the DIGITAL MODULE. Presence of t

can be determined by measuring (STEP 6)

CN003 PIN1

CN003 PIN1

function of the CPU on the Digital Module. This voltage is also

voltage. This check for 32VDC at CN1DC PIN 15 is just a more co

check for this voltage.

CN1DC PIN6

CN1DC PIN6

CN1DC PIN12

CN1DC PIN12

CN1DC PIN8

CN1DC PIN8

The switched 12VDC can be measured at pin 2 of CNA3 on the analo

The switched 12VDC can be measured at pin 2 of CNA3 on the analo

If the above voltages are missing, move to STEP 7 and check for

If the above voltages are missing, move to STEP 7 and check for

PIN 4. This is the 13.5 volts that feeds the Power Supply board..

PIN 4. This is the 13.5 volts that feeds the Power Supply board

The Audio Circuits are fed by a plus and minus 15VDC. These two

The Audio Circuits are fed by a plus and minus 15VDC. These two

checked as shown in STEP 8. The checkpoints are CNA1 PIN 1 And

Please notice the dotted line from the IC9501/T9501 block. The

Please notice the dotted line from the IC9501/T9501 block. The

this block is used to energize RY9201. RY9201 closes and applie

L9201 and it

the LAMP.

! THIS IS A VOLTAGE THAT MUST BE CHECKED WITH REFERENCE TO HOT

With the POWER FACTOR CONTROL off, the

o operate the lamp ballast

om CHASSIS GROUND

32VDC This voltage is a loop through voltage used for PLL

used for TUNER

nvenient place to

13.5VDC checkpoint

9VDC checkpoint

5VDC checkpoint

13.5VDC at CN90B

voltages can be

18VDC generated by

s the full 380VDC via

’

s associated control circuits to operate the LAMP BALLAST and ig

’

s associated control circuits to operate the LAMP BALLAST and ig

L.

NOTE

L.

NOTE

5vdc, 9VDC and

g board.

CN90AA PIN5.

NOTE

hese voltages

nite

HD-ILA

Video Path HD-XXFH96

2

5

4

2

1

Video Inputs

1. RF input

2. Input 1~4 (V and YC)

3. Digital (HDMI 1 & 2)

4. ATSC input

5. PC input

3

In this diagram, using the numbers of the inputs

In this diagram, using the numbers of the inputs

that correspond to the numbers at the various

location, the input paths and condition

descriptions are called out as you trace each

one.

HD-ILA

Control Path HD-XXFHX96

CNT

CNSW

CNF3 CNF2 CNF1

AC in

Therm

ostat

Lamp

Thermal

Sens

Interlock

SW

FanFanFan

Remote

Side

PWB

CNS1

Front LED

PWB

Tuner

PWB

CN1502

ATSC

Tuner

Module

CN1302

CN9701

Fan

CN00FL

T1

Remote in

CNS1

CNF CNT1

Pwr ON

Function

CN1001

SD Card

PWB

CNRE

CN011

Analog PWB

CN100C

CN8CV1

Card

Viewer

PWB

CNV1

Power Control

CN011

CN005

Digital

PWB

HDMI

1

DD comm.

CNOLV1

CN001

HDMI

2

CNLV1

CN83IR

PWB

CNIRM

Motor

CNIR

Iris

CNA2

Power

PWB

CNBL

CN102

Ballast

CN101

CNBCT

DD

PWB

1. Standby 5V from PS powers CPU

2. Power on from Remote or Front panel

3. CPU turns on the power. All circuits are powered up

4. CPU checks thermal sensor, interlock switch, fan, etc. If OK, then turns on the lamp

This slide indicates the paths of the control

This slide indicates the paths of the control

signals that are used in the operation of the

ILA unit. The paths include those input from

the remote hand unit, the front panel operation

of the power on command, functions of the

side control panel, and the subsequent calls

from the microprocessor that manage

switching, monitoring and control functions for

fan control, interlock monitoring and thermal

sensor status. The card viewer is only available

for the HD--

for the HD

70FH96.

HD-ILA

Lamp and Fan Block

HD-XXFH96

Check Standby 5V

and Power on

command

Digital

Main_POW

board

Lamp Cover det

Check Lamp

Cover SW

Clossed (0V)

Lamp Fan

Ballast Fan

OP Block Fan

Check Fan control signal and Fan OK signal. If fan

failure is detected, CNF1-3 becomes 5V. Power shuts

off.

Vcc

Lock

Vcc

Lock

Vcc

Lock

CNSW

2

3

AC in

STB5V

Tx Rx

CNLV1

CNF3

21

CNA2

CNF2

12 1

6

1

3

1

2

Power

4

13V -11V

17

CNDD

Main Drive

CNF1

2

Control (0~1V)

Fan Lock (0V)

Check AC input to

the power supply

Check Lamp

Supplies. 380V

CNBL

3

1

CNBCT

5

413

380V

15V

Check all supplies

and 15V (Hot

ground)

to the Main Drive

board

7

2.5V

Lamp on(2.5V)

Lamp return

OK(0V), NG(5V)

Check Lamp ON signal. 2.5 V for 4 seconds and 0V for

6 seconds. In case, no lamp return (OK) within 3 tries

(30 seconds), warning appears and power goes off

1 3

CN102

Lamp

Ballast

LAMP and FAN failures can be checked using this block diagram.

LAMP and FAN failures can be checked using this block diagram.

***POINT OUT EACH STEP AS YOU EXPLAIN IT****

***POINT OUT EACH STEP AS YOU EXPLAIN IT****

Step 1:

Step 1:

voltage there, check to see if the LAMP THERMOSTAT is OPEN.

Step 2:

Step 2:

HIGH at CNA2 PIN3 on the Power Supply board.

Step 3:

Step 3:

PIN 2 on the MAIN DRIVE BOARD. Proper closure of this switch i

by a 0VDC reading.

Step 4:

Step 4:

This line connects to the Power Supply board as CNDD.

Step 5:

Step 5:

These voltages can be found at CNBL on the POWER SUPPLY board.

VOLTAGES ARE MEASURED WITH REFERENCE TO HOT GROUND, NOT

CHASSIS GROUND.

Step 6:

Step 6:

detected, the voltage at CNF1--

detected, the voltage at CNF1

Check for the presence of AC voltage at CNSE. If there is no

Check for Standby 5 volts at CNA2 PIN 1 and an operational

Check for LAMP COVER SWITCH INTERLOCK closure at CNSW

s indicated

Measure for 13VDC at CNDD PIN 1 and --

Measure for 13VDC at CNDD PIN 1 and

Check the 2 supplies that provide voltage for LAMP operation.

At CNF1--

At CNF1

3 PIN 2 of the MAIN DRIVE BOARD, if a fan failure is

3 PIN 2 will be 5VDC.

11VDC at CNDD Pin 7.

THESE 2

HD-ILA

Audio Path HD-XXFH96

2

Side PWB

Center Ch. In

5

A1~A

2

3

Line

Tuner

PWB

1

D.Aud (Analog)

3

A4

IC

601

A.H.S. Audio

Analog PWB

IC101

Audio select

IC106

Buffer

IC

604

Amp.

IC

301

SW

IC

607

ADC

IC106

HDMI(A/B)

IC

605

Digital

Out

Analog PWB

D.Aud

(Digital)

Digital

PWB

HDMI

1

4

LC

Filter

LPF

2

IC101

A1A2 A3

Tuner

D.Aud

(Digital)

A4

Audio Outputs

1. Speaker output

2. Line output

Line

IC301

Center CH.

ATSC

ATSC Tuner

Audio Inputs

1. RF input

2. Input 1~4

3. HDMI (Analog)

4. HDMI (Digital)

5. Center CH

6

6. ATSC input

JVC HD-ILA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual