Hitachi 42HDF52 - 42" Plasma TV Bedienungsanleitung

No.

HITACHI

SERVICE MANUAL

42HDF52

Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful

radiation and materials, various measures are provided in this Plasma Monitor.

Be sure to read cautionary items described in the manual before servicing.

These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric

shock, do not perform any servicing other than that described in the operating instructions unless you are

qualified to do so.

1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter

carefully and with caution in order not to receive injury.

2. Replacement work should be started after the Panel Module and the AC/DC Power supply have

become sufficiently cool.

3. Special care should be taken when working near the display area in order not to damage its surface.

4. The Panel Module should not be touched with bare hands in order to protect its surface from

blemishes and damage.

5. It is recommended that you use clean soft gloves during the replacement work in order to protect not

only the display area of the Panel Module but also yourself.

1. Features -------------------------------------------3

2. Specifications ------------------------------------4

3. Component Names -----------------------------5

4. Service points ------------------------------------7

5. Adjustment

Caution

----------------------------------------8

6. Troubleshooting --------------------------------10

7. Blockdiagram ---------------------------------- 23

8. Connection diagram ----------------------------26

9. Wiring diagram ----------------------------------- 27

10. Basicblockdiagram --------------------------- 28

11. Printed wiring board diagram ---------------- xx

12. Disassembly diagram------------------------- 30

13. Replacement partslist ------------------------ 31

Contents

Service Warning

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

TA 001

Ver. TA 001.02

Circuit Board Layout w/ part #'s

Updated 3/24/06

Plasma Television

N FOR SAFETY

read this page before repair the monitor. p you stay safe and prevent accidents during the repair

work.

 Please f

CAUTIO

Please

The following safety precautions are designed to hel

take note o these cautionary flags.

Warning This means "Potential to sustain injury or even death."

Caution This means "Potential to sustain breakage or irreparable damage."

 Als onso note these cautionary ic

This means "CAUTION" This means "MUST"

This means "POTENTIAL ELECTRIC

SHOCK" This means "DO NOT"

WARNING

 Follow in Must usestructions.  same types of wires and components.

The cabinet, chassis, and labels are p

that require attention. You must follow the

caution notes and safety instructions

presented

arts

throughout this User Manual to

revent damage to them or injury top

yourself.

 Prevent electric shock.

ver,

rts to their original

onditions in order to prevent electric

The Monitor uses special tubes and tap

made from insulated materials. Moreo

some materials are kept from making

contact with the PWB for the sake of

safety.Internal leads are kept from hot

parts or high voltage parts by means of

clamps or other measures. As such, yo

must restored these pa

shock or fire.

 Perform safety check when done.

Exercise caution while working on th

device as the Monitor contains high

voltage parts and power supply.It is

possible to sustain severe injury or dea

if you accidentally touch the wrong

parts.You must disconnect the po

supply while servicing, reassembling, or

change parts. If

wer

you touch a live

onnection it is possible to sustain severec

injury or death.

 Use recommended components.

fter

he impedance value is

ss than 4M ohm, then electric shock or

Every part (such as removed screws,

components, and wiring) must be

restored to their prior conditions a

servicing.Be sure to check everything

that was repaired for damage or

mistakes. Also measure the insulated

impedance with a meg-ohm meter to

confirm that the impedance value is more

than 4M ohm.If t

fire may result.

 Do not tr

comb na

y to check the HDCP code and

tion circuit.i

Use only the recommended components

or componentst that structurally identica

to the originals. This is to ensure safety

and reliability. Pay special att

parts in the parts list and circuit diagram

marked with

ention to s

. If you use

non-recommended components, then

electric shock or fire may result.

Never remove the shield case protecting

the HDCP code and combination circuit.

rp or hard objects.

lean the screen with a soft cloth moistened with warm water and dry with a second soft cloth. If it is not

gent. Do not use harsh or abrasive cleaners.

ne detergents, alcoholic detergents, abrasive cleaners, powder soaps, OA cleaners, car

and so on. They will cause discoloration, scratches or cracks.

he 42-inch color plasma display panel, with a resolution of 1024 (H) x 1024(V) pixels, creates a widescreen

and can be hung on a wall with an optional wall mounting kit.

his panel displays a wide range of personal computer signals from 640 x 400 VESA, 640 x 480 VGA to 1024

ystem

he included remote control operates all Monitor functions. Futhermore, the on-screen display system shows

gs in an easy-to-view fashion.

 Power saving system

When connected to a VESA DPMS-compliant PC, the monitor cuts its power consumption while idle.

PRECAUTIONS

 Cleaning the monitor's plasma screen panel

Before cleaning the monitor, turn it off and disconnect the power plug from the power outlet. To prevent

cratching or damaging of the plasma screen face, do not knock or rub the surface with shas

enough, then use a cloth with mild deter

 Cleaning the monitor's cabinet

Use a soft cloth to clean the monitor's cabinet and control panel. When excessively soiled, dilute a neutral

detergent in water, wet and wring out the soft cloth in it, gently clean the cabinet, and then wipe it down with a

ry soft cloth.d

Never use acid/alkali

wax, glass cleaners,

1. Features

 High definition Plasma display panel

picture. This panel features a thin form factor

 High Performance Digital Processor

x 768, 1280 x 1024 XGA.(RGB Analog input).

 Easy-to-use remote control and on-screen display s

the status of the control settin

2. Specifications

Display

dimensions Approx. 42inches (922 (H) x 522 (V) mm, diagonal 1059mm)

Panel Resolution 1024 (H) x 1024 (V) pixels

Net dimensions 1036 (W) x 771 (H) x 300 (D) mm (With stand)；1036 (W) x 713 (H) x 121 (D) mm (Without stand)

Net weight 46 kg (With stand)；41.5 kg (Without stand)

Temperatur Operating: 0°C to 40°C, Storage: -15°C to 60°C

Ambient

conditions Relative umidity Operating: 20% to 80%, Storage: 20% to 90% (non-condensing)

Power supply AC100 - 240V, 50/60Hz

Power consumption/at standby <400W / <1W

Audio output Built in 10W + 10W (8 Ω) speakers

(RGB input)

Input terminals

‧ANALOG RGB input terminal (D-sub 15-pin)

‧DVI input terminal (DVI-D)

‧DVI/ANALOG RGB audio input terminal (3.5mm Stereo Mini Jack)

Video signals 0.7 Vp-p

Input signals

Sync signals H/V separate, TTL level [2kΩ]

H/V composite, TTL level [2kΩ]

Recommended signal Analog: 20 modes; Digital: 18 modes

(Video input)

Input terminals

‧COMPOSITE VIDEO input terminal (RCA)

L/R COMPOSITE AUDIO input terminal (RCA)

‧S-VIDEO input teminal (RCA)

L/R S-VIDEO AUDIO input terminal (RCA)

‧Y-PB/CBPR/CRinput terminal (RCA)

L/RY-P

B/CBPR/CRAUDIO input terminal (RCA)

Input signals

Video signals NTSC-M

480i , 480p , 1080i/60 , 720p/60

Video output Signal

‧SUBWOOFER output terminal (RCA)

‧TV VIDEO output terminal (RCA)

‧L/R AUDIO output terminal (RCA)

‧OPTICAL OUT DIGITAL AUDIO output terminal

Recommended signal 4 modes

(TV RF input)

Input signals Input terminals ‧ANALOG RF input terminal (NTSC)

‧DIGITAL RF input terminal (ATSC)

 It takes at least 30 minutes to attain the maximum picture quality.

Applicable video signals for each input terminal

RCA DVI D-sub Remarks

Signal Type

Terminal Composite Video S-Video Component PC/STB RGB

ANALOG RGB 

DVI 

COMPOSITE 

S-VIDEO 

Y-PB/CBPR/CR

1080i/720p/480p/480i inputs.

(: Avaliable)

3. Component names

 Main unit

Control panel

 Al Adjustment buttons are located on the bottom of

the control panel

 Indications for each button's function can be found

on the inside of the control panel cover.

1. POWER 4. RIGHT X7. SELECT

2. CHANNEL S5. VOL W

2. UP S5. LEFT W

3. CHANNEL T6. INPUT

3. DOWN T6. EXIT Normal Button Action

4. VOL X

7. MENU

Button Action when MENU engaged

Power lamp

Remote-control receiver

Main power switch

The main

power switch is

located at the

back, on the

right side.

 Remote Control

1.PowerButton

2. Mute Button

3. Recall Button

4. Quick Buttons

5. PC Buttons

6. Video Buttons

7. NTSC Buttons

8. DTV Button

9. Numbers Button

10. RTN Button

11. Exit Buttons

12. Menu Button

13. Up/Down/Left/Right Button

14. SEL Button

15. Ch +/- Button

16. Vol +/- Button

17. DTV Menu Button

18. Back Button

19. OK Button

20. Fav. ch. Button

21. Info Button

22. PC ADJ. Button

23. Freeze Button

24. C.C. Button

25. Aspect Button

26. P. Mode Button

27. Zoom-/+ Button

28. MTS Button

29. PIP Swap Button

30. PIP Input Button

31. Sleep Button

4. Service points

 Lead-free solder

This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions

before attempting any soldering work.

Caution: Always wear safety glasses to prevent fumes or molten solder from getting into

the eyes. Lead-free solder can splatter at high temperatures (600℃).

 Lead-free solder indicator

Printed circuit boards using lead-free solder are engraved with an "F."

 Properties of lead-free solder

The melting point of lead-free solder is 40-50℃higher than leaded solder.

 Servicing solder

Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended. Although servicing with

leaded solder is possible, there are a few precautions that have to be taken. (Not taking these precautions

may cause the solder to not harden properly, and lead to consequent malfunctions.)

Precautions when using leaded solder

 Remove all lead-free solder from soldered joints when replacing components.

 If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the

lead-free solder has been completely melted (do not apply the soldering iron without solder).

 Servicing soldering iron

A soldering iron with a temperature setting capability (temperature control function) is recommended.

The melting point of lead-free solder is higher than leaded solder. Use a soldering iron that maintains a high

stable temperature (large heat capacity), and that allows temperature adjustment according to the part being

serviced, to avoid poor servicing performance.

Recommended soldering iron:

 Soldering iron with temperature control function (temperature range: 320-450℃)

Recommended temperature range per part:

Part Soldering iron temperature

Mounting (chips) on mounted PCB 320℃±30℃

Mounting (chips) on empty PCB 380℃±30℃

Chassis, metallic shield, etc. 420℃±30℃

(1) EMI PWB, AUDIO TRANSFER PWB, RS-232 PWB, AUDIO PWB, KEY PWB, IR PWB, I/O PWB,

CONNECTOR PWB, SPEAKER CONNECTOR PWB

(2) MAIN PWB

(3) ATSC BOX(Digital Tuner Module) / TUNER

(4) POWER PWB

(5) PDP MODULE (is all lead free solder. X-SUS PWB, Y-SUS PWB, LOGIC PWB, ADDRESS PWB, SDM

PWB)

The PWB assembly which has used lead free solder

42HDF52

5. Service Adjustments

Service Mode

This model has a limited service mode; there is no access to I2C parameters of any kind. The only service adjustments that can

be performed are the color temperature defaults.

Please note that to perform these adjustments, a colorimetry meter, such as a Minolta CA-100 or CA-200 is required to meas-

ure the actual screen during adjustments.

Color Temperature

This model has four (4) different color temperature defaults. The associated color temperature X:Y readings are shown below

on Table 1.

Preliminary:

Input 100 IRE white image. Allow 15 minutes warm up.

Procedure:

COLOR MODE X READING Y READING

COOL 0.268 +/- 0.01 0.283 +/- 0.01

NATURAL 0.285 +/- 0.01 0.293 +/- 0.01

WARM 0.314 +/- 0.01 0.327 +/- 0.01

BLACK & WHITE 0.335 +/- 0.01 0.343 +/- 0.01

Table 1

(continued)

Video

Color Temperature Cool

MENU Video

Image

Audio

Language

System

Video

Picture Mode

Tint

Sharpness

Color Temperature

Reset

Dynamic

Cool

SEL

Video

Color Temperature

Video

Color Temperature

Video

Color Temperature

Natural

Warm

Black/White

(Instruction) (Remote) (OSD)

1. Press the MENU button on remote.

2. Scroll or until Video is high-lighted.

3. Press the SEL button on remote.

4. Scroll or until Color Temperature is high-lighted.

(see note 1)

5. Press the SEL button on remote.

6. Scroll or until the Color Temperature which needs

adjustment is indicated at the right side.

Notes:

1. There are three (3) possible displays on this step, depending on

which Picture Mode is selected. Color Temperature follows Pic-

ture Mode, i.e. Dynamic >Cool,Natural >Warm,Cinema >

Warm. OSD controls for Brightness,Contrast, and Color only

appear when in Natural picture mode.

42HDF52

6. (Continued from previous page)

(Instruction) (Remote) (OSD)

7. Press the SLEEP button on the remote three (3) times. A new

line will appear below Color Temperature which co-

responds to whatever color temp had been selected in the pre-

vious step.

8. Scroll or until Cool Adj.2is high-lighted.

9. Press the SEL button on remote. The Red, Green , and Blue

parameters will appear.

10. Use or and or until the actual color temperature as

measured on the screen is within the specs shown in Table 1.

Video

Color Temperature Cool

Video

Color Temperature Cool

Cool Adj.

Video

Color Temperature Cool

Cool Adj.

SLEEP

SEL Video

Cool Adj.

Red 255

Green 194

Blue 252

Notes:

2. Depending on which temperature is being adjusted. Could be any of the following:

Cool Adj.

Natural Adj.

Warm Adj.

Black/White Adj.

Video

Warm Adj.

Red 255

Green 151

Blue 138

Video

Black/White Adj.

Red 255

Green 136

Blue 109

Video

Natural Adj.

Red 255

Green 166

Blue 202

Video

Cool Adj.

Red 255

Green 194

Blue 252

Sample values of the different color temperature parameters

6. Troubleshooting

The flow chart shown below will help you to troubleshoot your Monitor set with it doesn’t display normally.

Each procedure offers a simple way to check for system errors. Before starting, ensure that there is a signal in

and that the Monitor is turned on.

zPower turn on issue

Is the input voltage

applied to Power

supply unit?

(CN61 ①③)

Power cannot be turn on (LED does not light)

Yes

AC inlet

Check if the Power Cord

has been well connected

to TV?

Connect the wire

properly.

Yes

PBC-Main

Are the voltages applied

to CN10①⑤⑥ pins and

CN11①③④⑩ pins of

Power supply unit?

Yes

Power

switch AC Fuse 5HTP10

TL.510A 250V Filter

PWB

(CN61) 110V ①L ③W

(CN10) ①+5V ⑤+12V ⑥+12V

(CN11) ①+5V ③+3.3V ④+3.3V ⑩+5V

Power supply unit

Test again

Note: Voltage shown for CN10 and CN11 are at Power On State.

Power off voltages are 0V, except CN11 Pin 10, this voltage is

always present.

CH 2

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