Train Pack

5/28/2018 Train Pack

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HITACHI PLASMA DISPLAYS

Instructor: Alvie Rodgers C.E.T.

MARCH 2002 PLASMA TRAINING PACKAGE Alvie Rodgers C.E.T.


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SECTION 1 Plasma Basics ALIS Technology ............. ............. ............. .............. ............. ............. ............. ............. 01-01

HDTV Panel Design ............. .............. ............. ............. ............. ............. .............. ........ 01-02

Panel Structure...............................................................................................................01-03

CRT verses PDP ............. ............. ............. ............. .............. ............. ............. ............. ..01-04

Principle of Color PDP...................................................................................................01-05

SECTION 2 Basics Explained How Plasma Works .......................................................................................................02-01

Achieving High Resolution ............ ............. .............. ............. ............. ............. ............. 02-03

Double Scan Technology ........................ ............. ............. .............. ............. ............. .... 02-04

Symmetric Phosphors .............. ............. ............. ............. ............. .............. ............. ...... 02-05

Advantages of Plasma Display .............. ............. ............. ............. .............. ............. ...... 02-06

SECTION 3 Plasma Unit Break Down Specifications 32HDT20M ............................................................................................03-01

Front Panel Buttons .......................................................................................................03-03

PLASMA PANEL FRONT VIEW .......... ............. ............. .............. ............. ............. .... 03-04

PLASMA UNIT REAR VIEW (LEFT SIDE) ................................................................03-05

PLASMA UNIT REAR VIEW (RIGHT SIDE) .. ............. ............. .............. ............. ...... 03-06

PLASMA UNIT POWER SUPPLY AC-DC VIEW .......................................................03-07

PLASMA UNIT AC INPUT FILTER PWBs .................................................................03-08

PLASMA UNIT YSUS PWBs VIEW ............. ............. ............. ............. .............. ........ 03-09

PLASMA UNIT SIGNAL PWB VIEW .........................................................................03-10

PLASMA UNIT VIDEO/AUDIO OUT PWB VIEW .....................................................03-11

PLASMA UNIT CONNECTORS FROM VIDEO TO SIGNAL PWB VIEW ............ .... 03-12

PLASMA UNIT FRONT FRAME REMOVED VIEW ..................................................03-13

PLASMA UNIT FRONT FRAME REMOVED VIEW ..................................................03-14

PLASMA UNIT FRAME ASSEMBLY VIEW ............. ............. ............. .............. ........ 03-15

PLASMA UNIT FEED THROUGH ACCESS COVER REMOVAL ....... .............. ........ 03-16

PLASMA UNIT FAN ASSEMBLIES REMOVAL PROCEDURE .... ............. ............. ..03-17 PLASMA UNIT FAN ASSEMBLIES REMOVAL PROCEDURE (2) ............. ............. 03-18

PLASMA UNIT MAIN FRAME ASSEMBLY REMOVAL PROCEDURE ............ ...... 03-19

PLASMA UNIT WITH MAIN FRAME REMOVED ............. ............. ............. ............. 03-20

POWER SUPPLY AC-DC PWB (Picture) ............. .............. ............. ............. ............. ..03-21

POWER SUPPLY AC-DC PWB (Picture) ............. .............. ............. ............. ............. ..03-22

Y-SUS PWBs (Picture) .................................................................................................03-23

POWER SUPPLY DC-DC PWB (Picture) ............. .............. ............. ............. ............. ..03-24

LOGIC PWB (Picture) ..................................................................................................03-25

ADM PWBs (Picture) .............. ............. ............. ............. ............. .............. ............. ...... 03-26

ADM PWBs (Close Up Pictures) ...................................................................................03-27

CONNECTOR RIBBON CABLE REMOVAL ..........................................................03-28

New Plasma Layout ............ ............. .............. ............. ............. ............. ............. ........... 03-29

New Plasma Block Layout ............. ............. .............. ............. ............. ............. ............. 03-30

SECTION 3 Plasma Trouble Shooting D-Sub (15 Pin Connector) and Screen Trouble Displays ............. ............. .............. ........ 04-01

Plasma Display Problems 1 of 2 ... ............. ............. .............. ............. ............. ............. ..04-02

Plasma Display Problems 2 of 2 . ............. ............. ............. .............. ............. ............. .... 04-03

MARCH 2002 PLASMA TRAINING PACKAGE TABLE OF CONTENTS Alvie Rodgers C.E.T.

All materials are the property of Hitachi Home Electronics. They may not be republished, duplicated or otherwise displayed without the writ-ten permission of Hitachi Home Electronics


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SECTION ONE

(1)

PLASMA BASICS


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PAGE 01-01

ALISTechnology

(Altern

ateLightingofS

urfacesTechnology)

1 2 3 ? ?

: : :

Odddisplayline

Evendisplayline

?

Usethenon-lightingareabetweenelectrodes

?

Odd/Evenlinestobeseparatelydisplayed

withtimedifference

?

Realize1000linesbyVGAlevelofelectrode

numbers

(displaylinenumber+1=numb

erofelectrodes)

1 2 3 4 5 ? ?

Toincreasetheresolutionwithout

reducedbrightness

Conventional

ALIStechnology

Nonlightin

garea

Display

electr

odes

Lighting

Challenges

Innovations

: : :


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PAGE 01-02

480

1080H

DTV(1920x1080

pixels)

WideVGA

(852x480pixels) ?D

ouble

numberofelectrodes

?

Furtherhig

hprecision

process

ingandequipmentneedtobedeve

loped.

?Reduce

dcellapertureratio

?

Brightnessn

eedtobe

increasedfurther.

C

hallengeswith

PanelDesign

: : :

Displayelectrodes960

lines

Displayelectrodes2160

lines

Cellsize1.08x0.36mm

Cellapertureratio40%

CellSize40to20%

Cellapertureratio

les

sthan30%

Displayelectrode

Buselectrode

Blackstripe

Partition

Phosphor

1 2 ? ? ?

1 2 ? ? ?

: : :


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PAGE 01-03

Addresselectrode

(1024x3=3072lines)

Phosphor(stripeshaped)

R

PanelStructureofAL

ISTechnologyPDP

(1024x1024pixels)

Displayelectrodes(1024+1=1025)

1 2 3: :

1024

1025

Scanelectrode

(512lines)

G

B

Horizontal1024pixels

Samerearplateasco

nventionaltype

FrontPlate

RearPlate


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PAGE 01-04

3-2;

Comparison

betw

een

PDPan

dCRT

No

ITEM

CRT

P

DP

Luminous

Source

Phosphor

Phosphor

Excitation

Matter

ElectronBeam

Ultra-VioletR

aybyGas

Discharge

1

Display

Method

Excitation

Source

Cathode

MgO

Brightness

BeamCurrent

DischargeFr

equency

Chromaticity

R/G/BPhosphor

R/G/BPhosp

hor

2

Control

Method

Focusing

FocusVoltage

Fixed(none)

3

Life

Brightness

PhosphorDeg

radation

EmissionDecr

ease

Burn-in(PbO-

>Pb)

PhosphorDe

gradation

MgO

Damage(DotDefect)


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PAGE 01-05

Discharg

e

D

ielectriclayer

M

gO

(Red,

Green,

Blue)Phosphors

Frontglassplate

Barrierrib

Displayelectrodes

Add

resselectrodes

Rearglassplate

Visible

light

2-1-3;

Pr

inc

iple

ofCo

lorP

DP

UV


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SECTION TWO

(2)

PLASMA BASICS

EXPLAINED


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PAGE 02-01

Plasma displays work on the principle that passing a high voltage through a low-pressure gasgenerates light. Displays based on this have been around since the earliest days of electronics--the picture on John Logie Baird's first televisor was created by mechanically scanning a neonbulb. More recently, neon-based monochrome displays have been used on a few mains-poweredportable PCs from Compaq, Grid and IBM. These had a grid of wires in a sea of gas; when a

high voltage existed between a column and a row wire, the gas became incandescent and thepixel lit up.The major advantages were that it was thin and bright and had a fast response time. Againstthat, it was very power hungry and the control electronics needed to switch high voltagesquickly; as soon as LCDs stopped being dim, smudgy and expensive, the plasma display waspensioned off.Now a new breed of plasma displays is catching the eye. By having a mix of gases that emit ul-traviolet light and coating the inside of the display with different colored phosphors, full-colorimages can be created. Because a plasma pixel is simple it's easy to make large displays. Cur-rently, 40in. displays are available for around 8,000. However, the resolution on these is low--typically 640 by 480--and the power consumption in the hundreds of watts. They're most suit-

able for video and television applications.

How does a plasma display work?Plasma monitors work much like CRT monitors,but instead of using a single CRT surface coatedwith phosphors, they use a flat, lightweight sur-face covered with a matrix of tiny glass bubbles,each containing the gas-like substance, plasma,and having a phosphor coating. Each of the"pixels" in this matrix is actually comprised ofthree sub-pixels, corresponding to the colors red,

green and blue.

In a CRT monitor, an electron beam is fired fromthe rear of the long picture tube, hitting the phos-phors on the front surface which makes themglow. Complex circuitry and high voltage deflec-tions coils are required to aim, focus and movethe beam to create an entire image.Plasma displays eliminate the need for high voltage deflection coils and the long neckof a CRT. In a flat plasma monitor, a digitally controlled electric current flows throughthe appropriate parts of the matrix, causing the plasma inside the bubbles to give offultraviolet rays. These rays in turn cause the bubbles' phosphor coatings to glow theappropriate color.*Plasma display diagram, courtesy of Fujitsu General America, Inc.

HOW DOES A PLASMA DISPLAYS WORK


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PAGE 02-02

Plasma Display Technology

Plasma Displays work by applying a voltage between 2 transparent display electrodes on thefront glass plate of the display. The electrodes are separated by an MgO dielectric layer and sur-rounded by a mixture of neon and xenon gases. When the voltage reaches the firing level, a

Plasma discharge occurs on the surface of the dielectric resulting in the emission of ultra violetlight.This UV light then excites the phosphor material at the back of the cell and emits visible light.Each cell or sub-pixel has red, blue or green phosphor material and 3 sub-pixels combine tomake up a pixel. The intensity of each color is controlled by varying the number and width ofvoltage pulses applied to the sub-pixel during a picture frame. This is implemented by dividingeach picture frame into sub-frames. During a sub-frame, all cells are first addressed those tobe lit are pre-charged to a specific address voltage then during the display time the displayvoltage is applied to the entire screen lighting those which were addressed.Each sub-frame has a weighting ranging from 1 time unit to 128 time units for a typical eightsub-frame arrangement (Time Unit depends on size and number of pixels on the screen). This is

a purely digital PWM control mechanism, which is a key advantage as it eliminates any unnec-essary digital to analogue conversions, making the PDP technology ideal for the all-digital age.This so-called 3 Electrode Surface Discharge method was developed and patented by Fujitsu asfar back as 1984 while the Address/Display Separated (ADS) was patented in 1990.

? Brilliant picture quality

? Fully flat, large screen formats

? Thin (40mm) suitable for wall hanging

? 16.7 million colors for natural colors reproduction

? High brightness, high contrast

? Wide viewing angle 160 in all directions

? Fully digital internal operation

? Light weight 1/6 th of CRT? Unaffected by magnetic fields

? Fully flicker-free operation

PLASMA DISPLAY TECHNOLOGY


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PAGE 02-03

Achieving High Resolution

While conventional technology, as found in standard VGA resolution screens, uses 2 display electrodes for each

horizontal line, applying the same method to achieve higher resolution (>1000 horizontal lines) brings inherentproblems. Firstly, the number of electrodes would need to be doubled which would require very high precision

production processes. Secondly, the cell aperture ratio would reduce resulting in lower brightness. In addition, the

driving scheme would either have to operate with double the speed, again introducing significantly higher cost or adual-scan technique would have to be introduced. With dual-scan, twice as many driving ICs would be required. In

summary, implementing high resolution with conventional technology would result in lower brightness and in-

creased costs.

ALIS Technology

To achieve high brightness as well as

cost-effectiveness, FHP developed ALIS

(Alternate Lighting of Surfaces) Technol-

ogy. ALIS is based on 3 principles:

1. Odd and Even lines are dis-played separately

2. The non-lighting area between

the cells is utilized

3. The number of electrodes = the

number of horizontal display

lines + 1

Despite the smaller cell size, the aperture

ratio can be increased from 40% to 65%

meaning that the screen is inherentlybrighter. Another spin-off benefit is that the lighting duty is reduced to 50% (odd fields and even fields lit for half

of each frame) meaning that a significantly improved phosphor lifetime can be expected. To summarize, ALIS al-

lows cost-effective realization of high resolution, high brightness plasma display panels. It is FHPs latest major

innovation in advancing PDP technology.

ALIS high-resolution, high brightness PDP

Features of ALIS? High Resolution

? 2 times higher resolution by same number of electrodes

? High Brightness

? Brighter than VGA type, even with over 1000 lines

? Low cost Panel

? Production by current VGA panel process? Number of driving circuits reduces to 1/2

? TV/PC support

? Connectable to current TV signal (interlace) without scan conversation? Possible to support PC signal (Progressive)

? Less Flicker

? Less flicker as compared to CRT

? Low Noise? Low EMC noise level by both direction driving method

? High reliability

? Longer life by lighting duty of 1/2

HIGH RESOLUTION IN PLASMA DISPLAYS


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PAGE 02-04

Notes on Plasma Display Technology

Single Scan Technology - optimized trade-off between brightness, lifetime and cost There are 2basic driving schemes possible for PDPs - single scan and dual scan addressing. In single scan,all the cells on the screen are addressed before the display phase is entered. This requires justone set of address drivers on the PDP and so saves cost. In dual scan the screen is divided foraddressing into the top half and the bottom half. This requires 2 sets of drivers at the top andbottom of the PDP which obviously increases the cost of the panel. In dual scan the addresstime is half that of single scan so there is more time available for the display phase. This meansthat it is easily possible to increase the number of display (sustain) pulses applied to the PDP inthe display phase. This results in increased peak brightness but also increases power consump-tion and reduces phosphor lifetime which can be a critical issue for some applications. FHPPDPs use single scan technology which gives the optimal trade off between brightness, lifetimeand cost. Therefore FHP is continuously developing high speed driving methods and picturecontrol schemes with minimized cost. ALIS is also a single scan technology.

PLASMA DISPLAY TECHNOLOGY


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PAGE 02-05

Symmetric phosphors - The Reliable Choice

In symmetric phosphors, the red, green and blue sub-cells are all the same size. In an asymmet-ric arrangement the blue phosphor is usually larger and the red smaller. The reason for choosingthe latter arrangement is that blue makes a greater contribution to color temperature. When blue

is brighter, it is possible to use brighter red and green so the panel is brighter. However theasymmetric arrangement has major disadvantages in terms of manufacturing cost and lifetime.

The reason is that due to the different cell size there is a reduced drive margin (i.e. the voltage

range within which the cell will light). This results directly in lower yield in production whichincreases cost. As it is also expected that the drive margin will change over the operating time,there is a potential impact on the reliability of the panel operation. Due to the above reasonsFHP only uses symmetric arrangement to achieve the stable drive margin. FHP has also devel-oped an improved panel process to achieve a high color temperature.

HOW DOES PLASMA DISPLAYS WORK (Notes)


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PAGE 02-06

Razor-sharp image clarity, rich vibrant color and shades of gray, sleek design -- there areso many features that make plasma so cool.

Digital ConvergenceHigh-resolution data dis-play for sharp imagery

combined with excellentvideo capability for smoothmovement. A 16:9 aspectratio, and most, but notall, are compatible withDTV/HDTV.

Flat is Where It's AtNo optics means no imagedistortion, even at edgesand corners. Plasma dis-plays a bright, uniform im-

age in normal room lightwith an amazing 160-degree viewing area from all sides.

Thin By DesignAn astonishing 3 to 6.5 inches thick, plasma can hang anywhere without interfering withroom traffic. It's super sleek design may be unassuming, but it definitely makes a state-ment.

And more

? No viewing angle limitations? No projection "throw distance" limitations? High ambient light tolerance? Accurate, distortion free images? Video, computer and HDTV compatible? Completely digital? Unaffected by magnetism? Extremely bright, for clear display in any light? Thin profile saves space? Free-standing, or can be mounted to a wall or ceiling

Plasma vs. CRT? Clearer and sharper picture from edge-to-edge? Uniform brightness on any area of the screen? Flicker-free images

? Consume less power

Plasma vs. LCD

? Brighter picture? Wider viewing angle? Better color purity? Higher contrast ratio

ADVANTAGES OF PLASMA DISPLAY


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SECTION THREE

(3)

PLASMA

UNIT

BREAKDOWN


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PAGE 03-1

32HDT20M FEATURES

? 32 inches Hi-Vision compatible high-definition color plasma display panel.

? Newly developed Multi-scanning converter provides a multi-scan coverage of TV sig-

nals through to PC analog signals. (24kHz to UXGA (106kHz)

? Large high-quality display images free from color misconvergence and display distor-

tion, as well as from geomagnetic effect and the magnetic effect of ambient power

lines.? 32 inches ALIS PDP panel

? (aspect ration 16:9)

? Description: FPF42C128128UA-27

? Pixel Pitch: 0.84 mm (H) X 0.39 mm (V)

? Pixel Structure: RGB striped? Brightness: 190cd/m

2(typical) in dark room

? Contrast: 300:1 (typical) with front filter

AV UNIT:

RGB 1 and 2

Video: 0.7 Vp-p

Sync: Separate H/V, TTL level

Composite H/V, TTL level

Sync. On Green at 0.30 Vp-p

VIDEO 1

Composite Video or S-Video (for S1, S2)

NTSC 3.58, NTSC 4.43, PAL, M-PAL, N-PAL (SECAM)Video: Composite 1.0 Vp-p

S-Video: Y: 1.0 Vp-p, C: 0.29 Vp-p

Sync: Composite Sync

VIDEO 2

Component Video

Y, Pb, Pr or Y, Cb, Cr (480i, 480P, 575i, 720P, 1080i)

Video: Y: 1.0 Vp-p, C:

Pb/Pr or Cb/Cr 0.29 Vp-p

Sync: Superimposed with Y signal

PLASMA INPUT: One DVI 24 Pin Input.


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PAGE 03-2

Synchronization: Horizontal: 24-106 kHz

Vertical: 50-85 Hz

Resolution: Horizontal: 1024 Dots (max.)

Vertical: 1024 Lines (max.)

Colors: 16.7 Million (256 Gray)

Viewable Image Size: 715.68mm*399.36mm (Diag.32V)

Viewable Angle: 1600

Color Temperature: 1: Cool 2: Norm 3: Warm 4: User

Warm Up Time: 30 minutes to reach optimum performance levels

Power Supply

AC 108 132 V (5.0A)

60 Hz (automatic selected)

Power Consumption: 260 W (typical)

(Standby, less than 2 watt.)

Dimensions: 974mm*501mm*89mmWeight: 26.2 kg (approx.) with stand.

Audio Output Power: 10W + 10W (6 ohm)


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PAGE 03-3

PLASMA FRONT CONTROLS


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PAGE 03-4

PLASMA PANEL FRONT VIEW

This picture shows the front of the plasma unit with the front frame removed.While the unit has the front frame off and the panel exposed, use extreme caution to avoid;? Dust? Scratches? Fingerprints? Smears? Contaminates


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PAGE 03-5

PLASMA UNIT REAR VIEW (LEFT SIDE)

This picture shows the rear view of the plasma unit with the stand and back cover removed.The unit is laying down with the top to the left.Starting counter clock wise from the bottom left the PWBs shown are;? YSUS (L) PWB? POWER SUPPLY AC-DC PWB? POWER SUPPLY DC-DC PWB? YSUS (R) PWB? SIGNAL PWB? VIDEO PWB? FILTER PWB

The YSUS (L and R), Power Supply AC-DC and DC-DC are under the frame assembly. Thereare other boards not visible here under the frame assembly


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PAGE 03-6

PLASMA UNIT REAR VIEW (RIGHT SIDE)

This picture shows the rear view Left side of the plasma unit with the stand and back cover re-moved.The unit is laying down with the top to the right.Starting counter clock wise from the bottom left the PWBs shown are;? ? SIGNAL PWB? VIDEO PWB? FILTER PWB? YSUS (L) PWB? POWER SUPPLY AC-DC PWB? POWER SUPPLY DC-DC PWB? YSUS (R) PWB

The YSUS (L and R), Power Supply AC-DC and DC-DC are under the frame assembly. Thereare other boards not visible here under the frame assembly.There are 4 fans shown at the top. 3 are in the top piece and 1 is on the Power Supply AC-DC.


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PAGE 03-7

PLASMA UNIT POWER SUPPLY AC-DC VIEW

This picture shows the Power Supply AC-DC PWB and two of the top fans.Note on the top right hand side of the Power Supply PWB there is a small fan with a windguide focusing the air movement onto the power supply transformer.

Note: This PWB removal requires disassembly of the Frame Assemble.


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PAGE 03-8

PLASMA UNIT AC INPUT FILTER PWBs

This picture shows the AC input Filter PWBs.At the bottom center is the AC input plug.

Note: There are two grounding wires. These wires are screwed directly to the frame metal. Theyhave a lock washer under each of them.

Note: The top Filter PWB has a Plastic cover which is removed in this picture.

Lock Washer under

these two screws.

There is a black plastic cover over

this filter PWB not shown.


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PAGE 03-9

PLASMA UNIT YSUS PWBs VIEW

These pictures show the right and left hand side X and Y-SUS PWB.The X-SUS PWB is the top picture and the Y-SUS is the bottom.

Note: These PWBs are under the Frame assembly.


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PAGE 03-10

PLASMA UNIT SIGNAL PWB VIEW

This picture shows the Signal PWB removed.At the bottom are the inputs from Left to Right for PC, V Sync, H Sync, R-G-B.

Note: At the lower left hand side is a connector. These connectors require a specific release pro-cedure shown at the end of this section.


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PAGE 03-11

PLASMA UNIT VIDEO/AUDIO OUT PWB VIEW

This picture shows the Video PWB. This PWB also has the Audio Outputs on the lower lefthand side.

The connectors across the bottom are for Video Inputs and RGB InputsAt the bottom are the inputs for PC, R-G-B, Y-Cr/Cb or Y-Pr/Pb and composite.

Note: At the lower right hand side is a connector. These connectors require a specific releaseprocedure shown at the end of this section.


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PAGE 03-12

PLASMA UNIT CONNECTORS FROM VIDEO TO SIGNAL PWB VIEW

The Signal PWB has been removed in this picture.This picture shows the Video PWB on the Left and the Signal PWB on the right. (Removed)Use extreme care when removing these ribbon cables.The bottom ribbon cable connects the Video PWB PSV2 connector to the Signal PWB PMO2connector.The release procedure for these connectors are show below.The bottom ribbon cable is held in place by a plastic retainer. At the bottom is a rivet, no needto remove. The screws holding the top connector shown must be removed.The bottom ribbon cable is held under the top ribbon cable plastic and bottom screw.

RIBBON CABLE (Picture)

VIDEO PWB SIGNAL PWB

PWV2PSM2

UNDER

RIVET

PSV2 PM02

OPEN CLOSE


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PAGE 03-13

PLASMA UNIT FRONT FRAME REMOVED VIEW

This picture shows the Front Frame with anti-reflective screen. This must be removed with theplasma unit on its stand.

WARNING: When the screws are removed, this can and will fall off. Hold in place while re-moving the last screw. Use two people if necessary.

Note: There are three connectors from this panel to the Signal PWB. They are routed throughthe frame assemble. Do not remove this front frame without fishing these wires through theframe assembly.Shown on the next page.


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PAGE 03-14

PLASMA UNIT FRONT FRAME REMOVED VIEW

WARNING: When the screws are removed, the Front Frame can and will fall. Hold in placewhile removing the last screw. Use two people if necessary.

Note: These are three connectors from this panel to the Signal PWB. They are routed throughthe frame assemble. Do not remove the front frame without fishing these wires through the

frame assembly.


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PAGE 03-15

PLASMA UNIT FRAME ASSEMBLY VIEW

This picture shows the main Frame assembly. This Frame must be removed to allow access tothe PWBs underneath the frame assembly.

Here, the main frame is still attached and the unit is on its stand. The stand must be removed.

Leave the Front Frame assembly on and Lay the unit down on a soft, non-scratch pad.Remove the Stand by removing the 4 Screws holding it in place.

The Filter PWBs, Video and Signal PWBs have been removed. However, removal of thesePWBs are not necessary except for the Video PWB to allow access to the feed through shownon the next page.

FEEDTHROUGH

ACCESS COVER


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PAGE 03-16

PLASMA UNIT FEED THROUGH ACCESS COVER REMOVAL

This picture shows the preparation for removing the main Frame assemble. This is the ribboncable from the Logic PWB (underneath) to the Signal PWB on the right. (Removed).Note: There is a black Rivet on the top of the protective metal insert. There is a screw holdingthe bottom.

WARNING: When reassembling, be very careful not to drop screws and rivets. They will fallthrough the openings onto the lower PWBs. Making it very difficult to retrieve. Disassemblymay be necessary to recover.

RIVET


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PAGE 03-17

SCREWS

PLASMA UNIT FAN ASSSEMBLIES REMOVAL PROCEDURE

This picture shows the upper fans. This panel must be removed to allow access to screws under-neath that support the Main Frame assembly.

Note: There is two connectors that are routed to the fans. The connector to the Power SupplyAC-DC PWB is very difficult to remove.After removing the screws, and releasing the connector to the Fan on the Power Supply AC-DCunit, lift the Fan frame up high enough to use a pair of long needle nose pliers to release theconnector. Use caution so as not to cut, damage or destroy the connector.


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PAGE 03-18

SCREWS

M-FAN-6

FOR POWER SUPPLY AD-CD

CONNECTOR

PLASMA UNIT FAN ASSSEMBLIES REMOVAL PROCEDURE (2)

This picture shows the upper fans. This panel must be removed to allow access to screws under-neath that support the Main Frame assembly.

Note: There is two connectors that are routed to the fans. The connector to the Power SupplyAC-DC PWB is very difficult to remove.After removing the screws, and releasing the connector to the M-Fan-6 on the Power SupplyAC-DC unit, lift the Fan frame up high enough to use a pair of long needle nose pliers to re-lease the connector. Use caution so as not to cut, damage or destroy the connector.

Remove the M-Fan-6 Fan at this time.


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PAGE 03-19

PLASMA UNIT MAIN FRAME ASSSEMBLY REMOVAL PROCEDURE

This picture shows the Main Frame after it has been removed.

Note: When removing, do not force, pull or twist the frame assembly. Some components arethin and can be bent easily.


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PAGE 03-20

PLASMA UNIT WITH MAIN FRAME REMOVED

This picture shows the Plasma unit with the Main Frame removed.

Note: The Serial number and Identification stickers on the lower Right hand side.

At this time, the unit has the Top at the bottom.

Next, the PWBs are identified.


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PAGE 03-21

POWER SUPPLY AC-DC PWB (Picture)

TOP


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PAGE 03-22

POWER

(AC-DC)

SUPPLY PWB

UP CLOSE

TOP

POWER SUPPLY AC-DC PWB (Picture)


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PAGE 03-23

YSUS PWB LEFT (Picture)

TOP

LEFT

SIDE

XSUS

X and Y-SUS PWBs (Picture)

YSUS PWB RIGHT (Picture)

TOP

RIGHT

SIDE

YSUS

X-SUS

LEFT

SIDE

Y-SUS

RIGHT

SIDE


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PAGE 03-24

POWER DC-DC

POWER SUPPLY DC-DC PWB (Picture)


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PAGE 03-25

LOGIC PWB

ABUSR ABUSR

POW AD-DCPOW DD-DC

BOTTOM

LOGIC PWB (Picture)


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PAGE 03-26

ALL PWBs BELOW FRAME

Y-SUS X-SUS

LOGIC

POW DC-DC

POW

AC-DC

ABUSL ABUSR

ADM

ADM PWBs (Picture)


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PAGE 03-27

BOTTON RIGHT

ADM PWB RIGHT

(Picture)

ADM PWB LEFT (Picture)

BOTTON LEFT

ADM PWBs (Close Up Pictures)


50/58

PAGE 03-28

OPEN CLOSE

Do Not Twist.

Do not force closed without ribbon cable inserted.

Use light pressure.

CONNECTOR RIBBON CABLE REMOVAL


51/58

PAGE 03-29

NEW PLASMA PWB LAYOUT


52/58

PAGE 03-30

55V

Y SUS B.

S

D

M

S

D

M

CN52 CN42CN33

ABUSL BVcc 5V Va 55V

ABUSR BVcc 5V Va 55V

CN22

Va

X SUS B.

DC - DCCONVERTER

Vx

45VVw 180V

DC - DCCONVERTER

VE

YFVCC1

5V

YFVCC2

5V

FVE5H

17V

YFVE1

Vcc 5V Vs 80V VPr 2

Vcc 5V

D/AYFVE2

DC - DCCONVERTER

VE

XFVCC1

5V

XFVCC2

5V

XVE5H

17V

XFVE1 XFVE2

Vcc 5V

Vs 80V

CN23

CN33

Vs 80V

VXWG0

CN65

CN68

CN67

CN66

CN64

RST

CN6

CPUgo

PDPgo

LOGIC B

PFC

control

PSU B *1

Vra

Vpr2 3.3V

Vpr1 5v

Vsago

Va

Vcc

Vs80V

5VVsago

Vcego

AC100V

240V

CN61

10A

5V / 3.3V

PFCgo

SERVICE

SW

380V

PFCgo

Vsago

Vcego *1: Only

UA-01 type

VraVrs

Vr

w

MPU

Vrst

X

B

B

X

B

B

ADM ADM ADM ADM ADM ADM ADM

Y-SUSEVEN SW

Y-SCANEVEN SW

Y-SUS

ODD SW

Y-SCAN

ODD SW

POS/NEG

RESET SW

X-SUSEVEN SW

X-SCANEVEN SW

X-SUS

ODD SW

X-SCAN

ODD SW

POS

RESET SW

NEW PLASMA BLOCK


53/58

SECTION FOUR

(4)

PLASMA

TROUBLE

SHOOTING


54/58



55/58

PAGE 04-01

32HDT20M INPUT TERMINAL (D-Sub Connector)

PinNo: Signal

1 Red Video

2 Green Video (Sync Optional)

3 Blue Video

4 No Connection

5 No Connection

6 Red Ground

7 Green Ground

8

Blue Ground9 No Connection

10 Ground

11 No Connection

12 [SDA]

13 H. Sync [or H/V composite]

14 V. Sync [V.CLK]

15 [SCL]

13 245

68 7910

1113 121415

13 245

13 245

68 7910

68 7910

1113 121415

1113 121415

Indication Condition

The monitor indicates the message

POWER SAVE

The monitor detects no sync signal.

The monitor indicates the message

OUT OF FREQUENCY

The monitor detects a sync signal which is out ofspecification, or unstable.

MESSAGE TABLE

Onscreen Display


56/58

PAGE 04-02

32HDT20M DISPLAY PROBLEMS AND SYMPTOMS (1)

Entire Screen Does not Light

After going on, the screen

becomes black immediately

or after a few seconds. (Main

Power is turned off.)

Suspected Fault:

X-SUS

Y-SUS

Panel chassis

Logic

ABUSL

ABUSR

Screen Lights Dimly even on

a Black Screen

Suspected Fault:

Logic

Single Vertical line

(Of different colors)

Suspected Fault:

X-SUS

Y-SUS

Panel chassis

Vertical line from the middle

of effective scan area.

(Of different colors)

Suspected Fault:

Panel chassis

Bar 1/7 of width of the hori-

zontal size or in multiples of

1/7 is displayed. Abnormal

display

Suspected Fault:

Panel chassis

Logic

ABUSL

ABUSR

Bar 3/7 or 4/7 of width of the

horizontal size. Abnormal

display.

Different Colors

Suspected Fault:

Panel chassis

Logic

ABUSL

ABUSR


57/58

PAGE 04-03

32HDT20M DISPLAY PROBLEMS AND SYMPTOMS (2)

Single horizontal line does-

nt light. Or Single horizon-

tal line does not light among

the effective scanning area.

Suspected Fault:

Panel chassis

Bar 1/8 or multiples of 1/8 of

the screen height. Abnormal

Screen does not light.

Suspected Fault:

Panel chassis

Bar 1/2 of the screen height.

Abnormal Screen does not

light.

Suspected Fault:

X-SUS

Y-SUS

Panel chassis

Fixed display contents are

always displayed.Burnt image.

Suspected Fault:

Panel chassis

The entire screen becomes

brighter or darker. Loose Connection

Colors can not be displayed. Logic PWB

Sync is Disturbed Logic PWB

Luminance is Poor.Steps of gradation are

skipped.

Logic PWB

Abnormal Sound PSU, X-SUS, Y-SUS

Contrast, Color Temp. ad-

justment and gamma can

not be changed.

Logic PWB

ABCDE


58/58


Train Pack

Documents

plasma unit connectors

plasma unit feed

plasma unit videoaudio

plasma works

plasma unit signal pwb

plasma unit rear view

plasma unit ysus pwbs

plasma unit rear view