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NEC Multi Sync EA221WM Service Manual
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NEC Multi Sync EA221WM Service Manual

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SERVICE MANUAL

COLOR MONITOR
MODELS: EA221WM-BK (A)
NEC DISPLAY SOLUTIONS, LTD.
Multi Sync EA221WM
EA221WM (B)/EA221WM-BK (B)
EA221WM (J)/EA221WM (BK) (J)
3rd Edition
PART NO. 599910918
201006
08HR4LAN
08HR3LBN
08HR4LBN
08HR3LJN
08HR4LJN
08HR7LBW
08HR8LBW
08HR2GAN
08HR1GBN
08HR2GBN
08HRTLAN

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Summary of Contents for NEC Multi Sync EA221WM

  • Page 1: Service Manual

    PART NO. 599910918 SERVICE MANUAL Multi Sync EA221WM COLOR MONITOR 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...

  • Page 2: Very Important

    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;...
  • Page 3 1. Safety guideline in servicing Never touch the portions with the marking ( Do not expose the set to rain or water. A risk of fire or electric shock can result. Use an adequate power cord. A risk of fire or electric shock can result. Do not attempt to service or modify the set without prior permission of the manufacturer.
  • Page 4 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.
  • Page 5 Procedure of monitor repair Confirmation of 1. SERIAL NUMBER INFORMATION monitor version Confirmation of 2. TROUBLE SHOOTING defective parts Replacement of 3. DISASSEMBLY defective parts Electric parts What are replacement parts ? Was LCD panel Was Other parts Was MAIN PWB replacement? replacement ? replacement ?
  • Page 6 [Repair and Return] Was MAIN PWB replacement? Factory preset Repair completion Shipment setting 7. SHIPMENT SETTING OSD User menu [SWAP] Repair completion Shipment setting Factory preset 7. SHIPMENT SETTING OSD User menu...

  • Page 7: Table Of Contents

    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.

  • Page 8: Serial Number Information

    1. Serial Number Information Refer to the serial number information shown below. EX.) SERIAL NUMBER LABEL Panel code □ MODEL: g g g g g g g g g g SERIAL NO.: (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (1): Manufactured Year (3): Classification code (9): Factory Code...
  • Page 9 MODEL Panel Code (10) LCD Panel RoHS Vista EA221WM-BK 1(Black) N(TPV China Factory) A(USA) LM220WE1-TLD1 N(TPV China Factory) EA221WM 0(White) B(Europe) LM220WE1-TLD1 W ( Czech Tatung ) N(TPV China Factory) EA221WM-BK 1(Black) B(Europe) LM220WE1-TLD1 W ( Czech Tatung ) EA221WM 0(White) N(TPV China Factory) J(Japan)

  • Page 10: Trouble Shooting

    2. TROUBLE SHOOTING 2.1 No Power No Power The power supply equipment is Check the AC power. confirmed. The power on/off switch is turned on. Loosening of the power supply Replace AC power cable or AC inlet. connector is checked. Check connections of The cable connector is inserted.
  • Page 11 2.2 No Video (LED indicator orange) No Video (LED indicator orange) The power on/off switch is turned on. Replace the PC. Check the PC. Check the signal cable. Replace signal cable. Check connections of POWER PWB The cable connector is inserted. or MAIN PWB.
  • Page 12 2.3 No Display (LED indicator green) No Display (LED indicator green) The power on/off switch is turned on. Select the Input Source (Active). Check the Input Source. Is "PC" or "Monitor" in the Screen savers or power save state of Screen savers or mode is made clear.
  • Page 13 Replace the LCD panel. Replace the POWER PWB. Check connections of MAIN PWB The cable connector is or POWER PWB or FFC Cable. inserted. Replace the MAIN PWB. Replace the POWER PWB. Replace the FFC Cable. Replace the LCD panel.
  • Page 14 2.4 Image overlap, focus or flicker Recommended frequency EA221WM: 1680×1050@60Hz Image overlap, focus or flicker, color defect Factory Reset is executed. Change the resolution to Is the input signal proper? recommended frequency. Readjust the auto adjusts or clock phase in the OSD user menu. Replace MAIN PWB.
  • Page 15 2.5 Brightness defect Brightness defect Factory Reset is executed. “Brightness” of the OSD menu is adjusted. Replace the LCD panel. Replace the MAIN PWB.
  • Page 16 2.6 Color defect (Missing color(R, G, B)) / White balance defect Color defect (Missing color(R, G, B))/ White balance defect Factory Reset is executed. “R, G, B” of the OSD menu is adjusted. Check the signal cable. Replace signal cable Replace the MAIN PWB.
  • Page 17 2.7 Line defect / Block defect [Line defect] [Block defect] Line defect / Block defect Replace the LCD panel. Replace the MAIN PWB. 2.8 Partially color / Brightness uneven Partially color / Brightness uneven Replace the LCD panel.
  • Page 18 2.9 Dot defect (Bright dot / Dark dot) Dot defect (Bright dot / Dark dot) Is the dot defect in the standard? (*1) Replace the LCD panel. *1) The judgment of the dot defect is confirmed from the service manual.
  • Page 19 2.10 Audible defect (No sound or Noise etc.) Audible defect (No sound or Noise etc.) Check the position of sound volume or mute function. Check connections of AUDIO The cable connector is inserted. PWB or MAIN PWB or SPEAKER. Replace the AUDIO PWB. Replace the MAIN PWB.
  • Page 20 2.11 USB doesn't function. USB doesn't function. Check connections of USB The cable connector is inserted. PWB or MAIN PWB. Replace the USB PWB. Replace MAIN PWB 2-11...

  • Page 21: Disassembly

    3. DISASSEMBLY g Before you disassemble the set, turn off power and pull out the power plug. g Use the proper screwdriver. If oversize or undersize screwdriver is used, screws may be damaged. g Assembly is reversed process of disassembly. 3.1 Remove the stand...
  • Page 22 3.2 Remove the rear cover and bezel 50mm SYMBOL 12: Fix the cable on the position in the above photo with BLACK TAPE.
  • Page 23 CN001 113mm SYMBOL 8: Fix the cable on the position in the above photo with YELLOW TAPE.
  • Page 24 3.3 Remove the shield CN602...
  • Page 25 Shield for Back Light CN709 Shield_USB...
  • Page 26 3.4 Panel 50mm 50mm 50mm 80mm 80mm 80mm 80mm 90mm 80mm 90mm Put SYMBOL 18 <G>ALUMINUM TAPE on the position in the photo.
  • Page 27 CN801 CN804 CN802 CN803...
  • Page 28 3.5 Remove the PWB CN902 CN601 CN701 CN301 CN604 CN402 CN301(Main/B) LCD Panel(FFC) CN402(Main/B) CN001(Key/B) CN402(Main/B) CN001(Key/B) CN604(Power/B) CN602(Audio/B) CN902(Power/B) CN701(Main/B) and CN709(USB/B) CN601(Power/B) SPEAKER(L,R)
  • Page 29 CN301 CN701 CN402...
  • Page 30 CN902 CN601 CN604 3-10...
  • Page 31 50mm SYMBOL 12: Fix the cable on the position in the above photo with BLACK TAPE. 3-11...
  • Page 32 4. ADJUSTMENT 4.1 Measuring instruments, jigs, and tools When adjusting the unit, use measurement instruments, jigs, and tools specified below. Use a signal generator that can produce an all white, or all black screen. Signal timing should be VG-819. The amplitude of each signal (R, G, B) output should be maintained at 0.7Vp-p ± 0.05V when a load of 75Ω is connected 4.2 Power Supply Voltage INPUT: 100Vac ~ 240Vac ±10%, 47~63Hz...
  • Page 33 For SEC panel (LTM220M1-L01 LLB SZ SEC) For LG panel (LM220WE1-TLP1 GZ LGD) 9300 9300 8200 8200 7500 7500 6500 6500 5000 5000 4.6 Reference Signal Timing Horizontal Vertical Clock Timing HS,VS Freq. Freq. (MHz) Total Active Pulse Back Front Total Active Pulse Back Front (KHz) (Hz)
  • Page 34 4.8 Special key operation 4.8.1 Factory mode (1) When “Select” + “Reset” key was input during Information menu, open Waning OSD shows below. (2) Then press “Select” button again, open the OSD shows below，A factory menu is displayed. (3) If you turn off (power off) the monitor in the factory menu, it will exit the factory menu. 4.8.2 Enter Aging Mode (1) In the factory mode according to "4.8.1 Factory mode ".
  • Page 35 4.8.3 Factory mode Explanations HOURS RUNNING Show running time Back light ON Time. Resettable ON This value can reset by Factory reset. Power Save ＋ Soft OFF time. Resettable OFF This value can reset by Factory reset. UnResettable ON Back light ON Time. UnResettable OFF Power Save ＋...
  • Page 36 This page adjustable to white balance, in user mode only adjust ADC R,G,B gain to keep ADC offset value, and in factory both with ADC gain/offset to adjust. If input is Digital, then this page can’t to enter and adjustment, only select in page target. Auto Contrast count Auto contrast proceed counter Auto Adjust count...
  • Page 37 URL display switch function URL is “WWW.NECDISPLAYSOLUTIONS.COM” ON: Show URL in information menu OFF: Not show URL INIT: OFF EDID Write Protect EDID write protect switch function ON: protect (Can’t write EDID data) OFF: no protect (Can write EDID data) INIT: ON Expansion This function is select expansion value of initial setting (reset value)
  • Page 38 CS SAMPLE COMP Sync detect position of composite sync Refer scaler specification sheet for more detail. CS SAMPLE SOG Sync detect position of sync on green Refer scaler specification sheet for more detail. Register Address Address select for scalar Register Value Value select for scalar Color temperature adjust To adjustment and show current in user to color value of R, G, B gain and offset.
  • Page 39 5. Inspection Recommended frequency: 1680 X 1050@60Hz 5.1 Electric Performance Inspection Check for OSD control switch *The monitor with remote control does a similar inspection about remote control. (1) Receive recommended frequency, cross hatch pattern. (2) Check that the picture is shown after 4 seconds from power on. (3) Check that the LED on line indicator is blinking blue.
  • Page 40 5.5 External Inspection on the LCD Module 5.5.1For LG panel (LM220WE1-TLD1 KR LGD and LM220WE1-TLE3 KR LGD) Conditions Viewing distance: 35 ~ 50 cm Ambient illumination: 300 ~ 700 Lux (nominal 500 Lux) Ambient temperature: 25 + - 5 'C Viewing angle: The inspection shall be conducted within normal viewing angle range.
  • Page 41 Polarizer Defects Items Criteria Scratches Linear 0.05≤W≤0.1, 0.3≤L≤3.0, N≤2 Dent Circular 0.2≤D≤0.4, N≤2 W: Width L: Length D: Average diameter –(a+b)/2 Note) a. Average Diameter b. Linear : a>2b, Circular : a≤2b c. Extraneous substances which can be wiped out, like Finger Print, Particles, are not considered as a defect. d.
  • Page 42 5.5.2 For SEC panel (LTM220M1-L01 LLB SZ SEC) Conditions Viewing distance 35 ~ 50 cm Ambient illumination 300 ~ 700 Lux (nominal 500 Lux) Ambient temperature 25 + - 5 'C Viewing angle The surface of the module and the inspector's line of view shall be at 90 degrees. Display pattern Pure R, G, B, Black and White Inspection area...
  • Page 43 5.7 Visual Inspection Defect Type Count (mm) Reject (mm) Dark / bright spot *1 D ≤ 0.5 (foreign material, Stain, Dust) D > 0.5 N ≤ 4 N > 4 *Viewing distance: 30 cm Bright line (light lint), or W ≤ 0.08 dark line (dark line / hair) W >...
  • Page 44 Fig. 1 Bright Dot Defect Definition 【Bright Dot Definition】 -. Judge the bright dot Over Check Dot defect count Size Detect Red: under 18/64 Green: under 18/64 Check each Blue: under 28/64 Bright Dot Below brightness it i Low Bright Dot Red: under 18/64 Green: under 18/64 Blue: under 28/64...
  • Page 45 Fig. 2. Dark dot defect description 【two adjacent】 (Good) (N. G) Fig. 3. Minimum distance between dot defects 【dark dot - to - dark dot】 5 mm 4.9mm Good N. G 【bright dot - to - bright dot】 15 mm 14.9 mm Good N.
  • Page 46 5.5.3 For LGD panel (LM220WE1-TLP1 GZ LGD) Ambient conditions a. Temperature: 20-25 degreeC b. Humidity: 65±5 % RH c. Illumination: Single 20W fluorescent lamp non-directive (Appearance – 300 to 700 Lux, Display – 180 to 200 Lux) Viewing distance The distance between the LCM and the inspector’s eyes shall be at least 35cm Viewing Angle The inspection shall be conducted within normal viewing angle range.
  • Page 47 Polarizer Defects Items Criteria Scratches Linear 0.05≤W≤0.1, 0.3≤L≤3.0, N≤2 Dent Circular 0.2≤D≤0.4, N≤2 W : Width L : Length D :Average diameter –(a+b)/2 Note) e. Average Diameter Linear : a>2b, Circular : a≤2b g. Extraneous substances which can be wiped out, like Finger Print, Particles, are not considered as a defect. h.

  • Page 48: Writing Of Edid/Osd (Monitor Information) Data

    6. Writing of EDID/OSD (Monitor Information) data 6.1 Writing of EDID data 6.1.1 System Connection This system should be connected as shown below. Modify the connector end by removing the five (5) analog pins. Fig 3 DVI to D-SUB Signal Cable Fig 4 ISP COMMUNICATION I/F...
  • Page 49 6.1.2. Input Signal Horizontal synchronization frequency: 31 kHz (Negative) Vertical synchronization frequency: 42Hz (Negative) 6.1.3 Program Service tool Ver. 4.01 (Part No. 715L2005-C2) 6.1.4 Operation By taking up the 4.8.1 “Factory mode” procedure, enter into Factory Mode, and then setting “EDID WP” for “OFF”. 6.1.4.1 EDID Data Inspection and Writing to the D-SUB Connector (Analog) 1.
  • Page 50 4. When the screen as shown below appears, enter the Serial Number what you want and press [OK] button. 5. Quit the system of WinDDC.exe, and the analog part of EDID is just finished. 6.1.4.2 EDID Data Inspection and Writing to the DVI Connector (Digital) 1) Connect the EDID data writing unit with jigs, etc.
  • Page 51 4) When the screen as shown below appears, enter the Serial Number what you want and press [Enter] again. 5) When the screen as shown below appears, quit the program and the digital part is finished.
  • Page 52 6.1.5 EDID Data File EDID DATA FOR NEC EA221WM Analog 10 Note1 Note2 01 00 Note3 00 Note4 EDID DATA FOR NEC EA221WM Digital 10 Note1 Note2 01 00 Note3 01 Note4 00 Note5 Note 1: Address10h Week of manufacture...
  • Page 53 6.2 OSD "MONITOR INFORMATION" for Serial Number 6.2.1 System Connection This system should be connected as shown below. 6.2.2 Input Signal VESA 1680×1050 (60Hz) All White 6.2.3 Program TOOL_Monitor_Information_2 is copied onto an arbitrary folder. 1. PORT95NT.EXE 2. NECWB_6.1.11.16.exe OS: Windows XP 6.2.4 Operation Steps 1) At first, your PC must install "PORT95NT.exe”.
  • Page 54 3) The Serial number of OSD is written by the following settings and procedures. Click the “Auto” button first, and then do the procedures as below: (a) Customer: Select the monitor you have used. (b) Select “Write Serial Number” (c) Language Select: A ver/B ver: “English” ;J ver: “Japanese” (d) OSD Select: OSD (e) Hot Key:Off (f) S.N Setting...

  • Page 55: Shipment Setting

    7. SHIPMENT SETTING The monitor enters the factory mode by the procedure of "4.8.1 Factory mode", and sets the following items to an initial value. When the setting is completed, "Factory preset" is executed by the OSD User menu. Shipment Setting of Factory mode Item Initial value Analog...

  • Page 56: Packing Specification

    8. PACKING SPECIFICATION (33) SETUP MANUAL (34) PE BAG FOR MANUAL B and J Version (35) CD-ROM EA221WM (32) POWER COAD (36)PROTECT YOUR INVESTIMENT (28) Signal Cable Only J Version (31) DVI Cable (37) WARRANTY CARD (38) PC RECYCLE CARD (29)USB Cable (39)EPS (30)AUDIO Cable...

  • Page 57: Revision History

    9. REVISION HISTORY REVISION REVISION New Issue (1st Edition) 2008/11 Add new panel: LTM220M1-L01 (2nd Edition) 2009/10 Add new panel: LM220WE1-TLP1 (3rd Edition) 2010/06...

This manual is also suitable for:

Multi sync ea221wm-bkMulti sync ea221wm-bkaMulti sync ea221wmbMulti sync ea221wm-bkbMulti sync ea221wmjMulti sync ea221wmbkj

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