NEC Multi Sync EA221WM Manuale utente

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COLOR MONITOR Multi Sync EA221WM

MODELS: EA221WM-BK (A)

EA221WM (B)/EA221WM-BK (B)

EA221WM (J)/EA221WM (BK) (J)

3rd Edition

NEC DISPLAY SOLUTIONS, LTD.

201006

08HR4LAN 08HR3LBN

08HR4LBN 08HR3LJN

08HR4LJN 08HR7LBW

08HR8LBW 08HR2GAN

08HR1GBN 08HR2GBN

08HRTLAN

PART NO. 599910918

SERVICE MANUAL

When EA221WM is repaired, this manual is the description of the necessary matter.

VERY IMPORTANT!

This Equipment is compatible with RoHS Directive and Lead-Free.

Since the equipment is compatible with RoHS Directive, use components in which the use of specific

chemically noxious substances is restricted; use only designated spare parts when it is necessary to

replace such parts with new parts.

Use lead-free solder for the equipment compatible with ones with substrates on which lead-free

components are mounted. For the details, refer to “Caution for Lead-Free Soldering Work” given in the

next page.

This model has four types of LCD panel.

●The panel type manufactured by LG (LM220WE1-TLD1)

●The panel type manufactured by LG (LM220WE1- TLE3)

●The panel type manufactured by SEC (LTM220M1-L01)

●The panel type manufactured by LG (LM220WE1-TLP1)

Prior to servicing the unit, confirm the serial number of the unit.

The classification code of the serial number is [0, 1].

The classification code of the serial number is [2, 3].

The classification code of the serial number is [6, 7].

The classification code of the serial number is [B].

1. Safety guideline in servicing

1) Never touch the portions with the marking ( ).

2) Do not expose the set to rain or water.

A risk of fire or electric shock can result.

3) Use an adequate power cord.

A risk of fire or electric shock can result.

4) Do not attempt to service or modify the set without prior permission of the manufacturer.

A risk of fire or electric shock can result.

5) Leave the maintenance service to a service engineer having qualification, knowledge and experience.

A risk of electric shock, injury or fire can result.

6) Always employ genuine parts indicated in the service manual for replacement.

A risk of fire or electric shock can result.

7) Confirm the connection of the power supply connector earth cable in reassembling. (Soldering or Screw

fixation)

A risk of fire or electric shock can result.

8) Use the specified binding bands, clampers, tubes and barriers--all of which are necessary for

insulation/protection--in their original positions in reassembling.

A risk of fire or electric shock can result.

9) Other complete parts are returned to an appropriate position.

2. Other cautions necessary

1) When removing the cables from their connectors, take care not to damage the wire portions so as to prevent the

occurrence of poor contact.

2) When attaching/detaching screws, use a screwdriver that is well-fit to the screw size.

3. Caution for LEAD-FREE soldering work

For this equipment, parts compatible with lead-free materials are used. Please observe the following precautions,

when performing any soldering work.

1) Use lead-free solder for substrates mounted with lead-free parts. If you use eutectic solder by mistake, solder will

not fuse well because of the difference in fusion point.

2) Fusion Point

Lead-free solder: 220°C

Eutectic solder: 183°C

3) Solder composition of Lead-free solder: Sn-3.0Ag-0.5Cu

[Maker ] [Type]

Nihon Genma DHB-RMA NP303-###

Senju metal ESC F3 M705E-###

(#: This mark shows the diameter of the solder wire.)

4) When working with lead-free solder always use a temperature adjustable soldering iron. Moreover, the power

consumption of the soldering iron must use from 25W to 75W.

[Solder Iron tip temperature and contact time]

Category of Parts Lead-free solder Eutectic solder

*SMD Chip The Parts of Chip type 300-320°C(1-3sec) 260-280°C(1-3sec)

*SMD QFP The Parts (IC) of Quad Flat Pack Package type 320-350°C(1-3sec) 280-300°C(1-3sec)

Heat sink Heat sink 360-380°C(1-3sec) 320-420°C(1-3sec)

The Parts of Axial or Radial type

(The Electric Parts other than the above-mentioned.

Ax, RD

Ex.: IC, Transistor, Resistor, Capacitor)

340-370°C(1-3sec) 350-390°C(1-3sec)

Procedure of monitor repair

Confirmation of

monitor version

Confirmation of

defective parts

Replacement of

defective parts

What are

replacement

parts ?

Writing of EDID/OSD data

Adjustment of monitor

Inspection of monitor

“SWAP” or “Repair and Return”?

Was MAIN PWB

replacement ?

Was LCD panel

replacement?

Was Other parts

replacement ?

1. SERIAL NUMBER INFORMATION

2. TROUBLE SHOOTING

3. DISASSEMBLY

4. ADJUSTMENT PROCEDURES

5. INSPECTION PROCEDURES

6. Writing of EDID/OSD (Monitor Information) data

Electric parts

Yes

Yes

Yes

1 2

SWAP

Repair and Return

Appearance parts

or No

(

NPF

)

[Repair and Return]

[SWAP]

1

Was MAIN PWB

replacement?

Shipment setting Factory preset Repair completion

Yes

No

7. SHIPMENT SETTING OSD User menu

2

Shipment setting Factory preset Repair completion

7. SHIPMENT SETTING OSD User menu

CONTENTS

1. SERIAL NUMBER INFORMATION .................................................... 1-1

2. TROUBLE SHOOTING ...................................................................... 2-1

3. DISASSEMBLY .................................................................................. 3-1

4. ADJUSTMENT PROCEDURES ......................................................... 4-1

5. INSPECTION PROCEDURES ............................................................ 5-1

6. Writing of EDID/OSD (Monitor Information) data ............................ 6-1

7. SHIPMENT SETTING........................................................................... 7-1

8. PACKING SPECIFICATION ............................................................... 8-1

9. REVISION HISTORY .......................................................................…9-1

1-1

1. Serial Number Information

Refer to the serial number information shown below.

EX.) SERIAL NUMBER LABEL

(1):ManufacturedYear (3):Classificationcode (9):FactoryCode

(2): Manufactured Month (4) ~ (8): Running number (10): Control Code

MODEL:

SERIAL NO.: gggggggggg

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

January to September: 1 to 9

October: X

November: Y

December: Z

This running number does not reset at each month. For A ver. (U.S/Asia/Australia.): A

For B ver. (Europe/Asia/Australia.): B

For J ver. (Japan): J

TPV China factory: N

Czech Tatung :W

Discriminate by cabinet colorLast digit

(□) Panel code

1-2

MODEL Panel Code (3) (9) (10) LCD Panel RoHS Vista

EA221WM-BK (L) 1(Black) N(TPV China Factory) A(USA) LM220WE1-TLD1 Yes Yes

EA221WM (L) 0(White) N(TPV China Factory)

W (Czech Tatung) B(Europe) LM220WE1-TLD1 Yes Yes

EA221WM-BK (L) 1(Black) N(TPV China Factory)

W (Czech Tatung) B(Europe) LM220WE1-TLD1 Yes Yes

EA221WM (L) 0(White) N(TPV China Factory) J(Japan) LM220WE1-TLD1 Yes Yes

EA221WM(BK) (L) 1(Black) N(TPV China Factory) J(Japan) LM220WE1-TLD1 Yes Yes

EA221WM-BK (L) 3(Black) N(TPV China Factory) A(USA) LM220WE1-TLE3 Yes Yes

EA221WM (L) 2(White) N(TPV China Factory)

W (Czech Tatung) B(Europe) LM220WE1-TLE3 Yes Yes

EA221WM-BK (L) 3(Black) N(TPV China Factory)

W (Czech Tatung) B(Europe) LM220WE1-TLE3 Yes Yes

EA221WM (L) 2(White) N(TPV China Factory) J(Japan) LM220WE1-TLE3 Yes Yes

EA221WM(BK) (L) 3(Black) N(TPV China Factory) J(Japan) LM220WE1-TLE3 Yes Yes

EA221WM-BK (S) 7(Black) N(TPV China Factory) A(USA) LTM220M1-L01 Yes Yes

EA221WM (S) 6(White) N(TPV China Factory) B(Europe) LTM220M1-L01 Yes Yes

EA221WM-BK (S) 7(Black) N(TPV China Factory) B(Europe) LTM220M1-L01 Yes Yes

EA221WM-BK (L) B(Black) N(TPV China Factory) A(USA) LM220WE1-TLP1 Yes Yes

2-1

2. TROUBLE SHOOTING

2.1 No Power

NG

OK

NG

Check the AC power.

NG

OK

The power supply equipment is

confirmed.

The power on/off switch

is turned on.

Loosening of the power supply

connector is checked.

Check connections of

POWER PWB or MAIN PWB.

No Power

OK

NG

OK

Replace AC power cable or AC inlet.

Replace the POWER PWB. OK

NG

The cable connector is inserted.

NG

End

Replace the MAIN PWB.