NEC MultiSync LCD1550V Service Manual
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NEC MultiSync LCD1550V Service Manual

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SERVICE MANUAL
COLOR MONITOR
MODELS LCD1550V-1 (B)/-BK(B)
This model changed a LCD panel (manufactured by Hannstar) from the original model.
Use the applicable service manual which surely confirms the model number of the
NAME PLATE, INSTRUCTION.
Refer to the page which the point of view of the model number is mentioned in.
• Model number : LA-15R02 / LA-15R02-BK
Maintenance is performed by the original service manual (Part No.
599910571).
• Model number : LA-15R02-1 / LA-15R02-1-BK
Maintenance is performed using this service manual.
NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION
All manuals and user guides at all-guides.com
MultiSync
JUNE 2002
PART NO. 599910588
LCD1550V
200206
08109741
08109742

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  • Page 1 • Model number : LA-15R02 / LA-15R02-BK Maintenance is performed by the original service manual (Part No. 599910571). • Model number : LA-15R02-1 / LA-15R02-1-BK Maintenance is performed using this service manual. NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION JUNE 2002 200206 08109741 08109742...
  • Page 2 All manuals and user guides at all-guides.com WARNING The SERVICE PERSONNEL should have the appropriate technical training, knowledge and experience necessary to: • Be familiar with specialized test equipment, and • Be careful to follow all safety procedures to minimize danger to themselves and their coworkers. To avoid electrical shocks, this equipment should be used with an appropriate power cord.
  • Page 3 All manuals and user guides at all-guides.com Point of view of the model number NAME PLATE, INSTRUCTION (White model) Model number Original model: LA-15R02 Hannstar LCD model: LA-15R02-1 NAME PLATE, INSTRUCTION (Black model) Model number Original model: LA-15R02-BK Hannstar LCD model: LA-15R02-1-BK...
  • Page 4 All manuals and user guides at all-guides.com CONTENTS Page No. USER'S MANUAL ------------------------------------------------------------------- 1-1 SERIAL NUMBER INFORMATION --------------------------------------------- 2-1 DISASSEMBLY ----------------------------------------------------------------------- 3-1 ADJUSTMENT PROCEDURES -------------------------------------------------- 4-1 INSPECTION --------------------------------------------------------------------------- 5-1 TROUBLE SHOOTING ------------------------------------------------------------- 6-1 CIRCUIT DESCRIPTION ----------------------------------------------------------- 7-1 REPLACEMENT PARTS LIST --------------------------------------------------- 8-1 BLOCK DIAGRAM ------------------------------------------------------------------- 9-1 SCHEMATIC DIAGRAMS -------------------------------------------------------- 10-1...
  • Page 5 All manuals and user guides at all-guides.com USER'S MANUAL MultiSync LCD1550V User’s Manual UÏivatelská pfiíruãka Bedienerhandbuch Οδηγίες Χρήσης Manual del usuario Manuel Utilisateur Manuale utente Gebruikershandleiding Podr´cznik u˝ytkownika Руководство пользователя Kullan∂c∂ Klavuzu...
  • Page 6 Council Directive 73/23/EEC: – EN 60950 Council Directive 89/336/EEC: – EN 55022 – EN 61000-3-2 – EN 61000-3-3 – EN 55024 and marked with NEC-Mitsubishi Electric Visual Systems, Corp. MS Shibaura Bldg., 13-23, Shibaura 4-chome, Minato-Ku, Tokyo 108-0023, Japan...
  • Page 7 All manuals and user guides at all-guides.com TCO’99 This is a translation of the original English TCO'99 document. MultiSync LCD1550V White Model (LA-15R02 and LA-15R02-1) Congratulations! You have just purchased a TCO’99 approved and labeled product! Your choice has provided you with a product developed for professional use.
  • Page 8 All manuals and user guides at all-guides.com The requirements cover a wide range of issues: environment, ergonomics, usability, emission of electrical and magnetic fields, energy consumption and electrical and fire safety. The environmental demands concern restrictions on the presence and use of heavy metals, brominated and chlorinated flame retardants, CFCs (freons) and chlorinated solvents, among other things.
  • Page 9 All manuals and user guides at all-guides.com Cadmium** Cadmium is present in rechargeable batteries and in the colourgenerating layers of certain computer displays. Cadmium damages the nervous system and is toxic in high doses. TCO’99 requirement states that batteries, the colourgenerating layers of display screens and the electrical or electronics components must not contain any cadmium.
  • Page 10 All manuals and user guides at all-guides.com TCO’95 This is a translation of the original English TCO'95 document. MultiSync LCD1550V Black Model (LA-15R02-BK and LA-15R02-1-BK) Congratulations! You have just purchased a TCO’95 approved and labeled product! Your choice has provided you with a product developed for professional use.
  • Page 11 All manuals and user guides at all-guides.com The environmental demands concern restrictions on the presence and use of heavy metals, brominated and chlorinated flame retardants, CFCs (freons) and chlorinated solvents, among other things. The product must be prepared for recycling and the manufacturer is obliged to have an environmental plan which must be adhered to in each country where the company implements its operational policy.
  • Page 12 All manuals and user guides at all-guides.com Cadmium** Cadmium is present in rechargeable batteries and in the colourgenerating layers of certain computer displays. Cadmium damages the nervous system and is toxic in high doses. TCO’95 requirement states that batteries may not contain more than 25 ppm (parts per million) of cadmium.
  • Page 13 All manuals and user guides at all-guides.com English Deutsch Ελληνικά Español Français Italiano Nederlands Русский...
  • Page 14 Caution: When operating the MultiSync LCD1550V with a 220-240V AC power source in Europe, use the power cord provided with the monitor. In the UK, a BS approved power cord with a moulded plug has a Black (five Amps) fuse installed for use with this equipment.
  • Page 15 All manuals and user guides at all-guides.com Contents Your new NEC MultiSync LCD monitor box* should contain the following: • MultiSync LCD1550V monitor with tilt base • Power Cord(s) • Video Signal Cable • User’s Manual • CD ROM (includes complete User’s Manual in PDF format). To see the User’s Manual, Acrobat Reader 4.0 must be installed on your PC.
  • Page 16 For Mac: Connect the MultiSync LCD1550V Macintosh cable adapter to the computer (Figure B.1). Attach the 15-pin mini D-SUB end of the appropriate signal cable to the MultiSync LCD1550V Macintosh cable adapter (Figure B.1). Tighten all screws. 4. Connect the 15-pin mini D-SUB of the video signal cable to the appropriate connector on the back of the monitor (Figure C.1).
  • Page 17 All manuals and user guides at all-guides.com Refer to the Controls section of this User’s Manual for a full description of these OSM controls. NOTE: If you have any problems, please refer to the Troubleshooting section of this User’s Manual. Figure A.1 Macintosh Cable...
  • Page 18 All manuals and user guides at all-guides.com Connector cover Cable cover Clip B Figure C.1 Vacation Switch Power Button Figure D.1 Tilt Grasp both sides of the monitor screen with your hands and adjust the tilt as desired (Figure TS.1). Remove Monitor Stand for Mounting To prepare the monitor for alternate mounting purposes: 1.
  • Page 19 All manuals and user guides at all-guides.com 4. Remove the 4 screws connecting the monitor to the stand and lift off the stand assembly (Figure R.2) the monitor is now ready for mounting in an alternate manner. 5. Connect the AC cord and signal cable to the back of the monitor (Figure R.3).
  • Page 20 All manuals and user guides at all-guides.com Figure R.2 Non-abrasive surface Figure R.3 7. This LCD monitor is designed for use with a flexible arm. Please use the attached screws (4pcs) when mounting. To meet the safety requirements the monitor must be mounted to an arm which guaranties the necessary stability under consideration of the weight of the monitor.
  • Page 21 All manuals and user guides at all-guides.com Replace screws Thickness of bracket (arm) 2.0 ~ 3.2 mm Tighten all screws 75 mm 75 mm 4 SCREWS (M4) (MAX depth: 8.5 mm If use other screw, check depth of hole. Weight of LCD assembly: 3.2kg (MAX) English-8 1-17...
  • Page 22 All manuals and user guides at all-guides.com Controls OSM (On-Screen-Manager) Controls The OSM controls on the front of the monitor function as follows: To access OSM press any of the control buttons ( , , -, +, NEXT). Control Menu EXIT Exits the OSM controls.
  • Page 23 All manuals and user guides at all-guides.com Auto Adjust Automatically adjusts the Image Position, the H. Size and Fine setting. Position Controls LEFT/RIGHT Controls Horizontal Image Position within the display area of the LCD. DOWN/UP Controls Vertical Image Position within the display area of the LCD.
  • Page 24 All manuals and user guides at all-guides.com OSM TURN OFF The OSM control menu will stay on as long as it is use. In the OSM Turn Off submenu, you can select how long the monitor waits after the last touch of a button to shut off the OSM control menu.
  • Page 25 All manuals and user guides at all-guides.com OSM Warning OSM Warning menus disappear with Exit button. NO SIGNAL: This function gives a warning when there is no signal present. After power is turned on or when there is a change of input signal or video is inactive, the No Signal window will appear.
  • Page 26 All manuals and user guides at all-guides.com Recommended Use Safety Precautions and Maintenance FOR OPTIMUM PERFORMANCE, PLEASE NOTE THE FOLLOWING WHEN SETTING UP AND USING THE MULTISYNC LCD COLOUR MONITOR: • DO NOT OPEN THE MONITOR. There are no user serviceable parts inside and opening or removing covers may expose you to dangerous shock hazards or other risks.
  • Page 27 All manuals and user guides at all-guides.com • Allow adequate ventilation around the monitor so that heat can properly dissipate. Do not block ventilated openings or place the monitor near a radiator or other heat sources. Do not put anything on top of monitor. CAUTION •...
  • Page 28 All manuals and user guides at all-guides.com • Avoid displaying fixed patterns on the monitor for long periods of time to avoid image persistence (after-image effects). • Get regular eye checkups. Ergonomics To realize the maximum ergonomics benefits, we recommend the following: •...
  • Page 29 All manuals and user guides at all-guides.com Printed in Taiwan HD67NM55101 1-25...
  • Page 30 All manuals and user guides at all-guides.com Serial Number Information Refer to the serial number information shown below. EX.) SERIAL NUMBER LABEL (White model) Model Name : LCD1550V-1 : LCD1550V-1-BK (Black model) SERIAL NO. : g g g g g g g g g Manufactured Year : ( Last digit ) Manufactured Month :...
  • Page 31 All manuals and user guides at all-guides.com 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 the opposite process of disassembly. SYMBOL CODE(Compal) CODE(NMV)
  • Page 32 All manuals and user guides at all-guides.com SYMBOL CODE(Compal) CODE(NMV) DESCRIPTION CABINET COLOR FANM5516100 79PP0587 CABINET BACK ASSY White FANM5516200 79PP0606 CABINET COVER ASSY(BK-A) Black #2CPITS*3*12*3AF White #2CPITS*3*12*3KF Black...
  • Page 33 All manuals and user guides at all-guides.com SYMBOL CODE(Compal) CODE(NMV) DESCRIPTION CPIMS(CUP)*3*6*3AF SCREW SPECIAL SHIELD PCB ASSY SYMBOL CODE(Compal) CODE(NMV) DESCRIPTION #2CPITS*3*12*3AF 454A5267001 79PP0584 PCBA KEY/B VK-530 LNM555G...
  • Page 34 All manuals and user guides at all-guides.com SYMBOL CODE(Compal) CODE(NMV) DESCRIPTION CABINET COLOR CPIMS(CUP)*3*6*3AF 461A7367004 79PP0860 FIRMWARE CTRL/B VL-543 LN White 461A7367005 79PP0868 FIRMWARE CTRL/B VL-543 LN Black SYMBOL CODE(Compal) CODE DESCRIPTION CABINET COLOR CPIMS(CUP)*3*6*3AF SPECIAL WASHER 4*8*15BF CFIMS*3*6*3KF 453A7367001 79PP0801 PCBA POWER/B VP-543 LNS55 453A7567001...
  • Page 35 All manuals and user guides at all-guides.com SYMBOL CODE(Compal) CODE(NMV) DESCRIPTION CABINET COLOR #2CPITS*3*12*3AF FANM5515100 79PP0586 CABINET FRONT ASSY White FANM5515200 79PP0605 CABINET FRONT ASSY(BK-A) Black SYMBOL CODE(Compal) CODE(NMV) DESCRIPTION CPIMS*2.5**4*3AF...
  • Page 36 CABINET COLOR HINGE L HINGE R FANM5523100 79PP0620 STAND FRONT NM5523 ABS+PC White FANM5523200 79PP0695 STAND FRONT NM5523 ABS+PC Black BRACKET HINGE FANM5517100 79PP0618 BASE ASSY NM5517 ABS+PC M White FANM5517200 79PP0693 BASE ASSY-NEC NM5517 ABS+ Black SL-CPIMS*4*8*15BF ---- SL-CPIMS*4*16*15BF...

  • Page 37: Table Of Contents

    All manuals and user guides at all-guides.com ADJUSTMENT PROCEDURES TABLE OF CONTENTS Page 1. Application --------------------------------------------------------------------------------------------- 2-2 2. Adjustment conditions ------------------------------------------------------------------------------ 2-2 2.1 Time for adjustment ------------------------------------------------------------------------------- 2-2 2.2 Measuring instruments, jigs, and tools ------------------------------------------------------- 2-2 2.3 Power-supply voltage ----------------------------------------------------------------------------- 2-2 2.4 Aging -------------------------------------------------------------------------------------------------- 2-2 3.

  • Page 38: Application

    All manuals and user guides at all-guides.com 1. Application This adjustment specification shall be applied to the adjustment of the LCD1550V (LA-15R02-1) / LCD1550V-BK (LA-15R02-1-BK). 2. Adjustment conditions 2.1 Time for adjustment Adjustment of a unit to be adjusted shall be carried out only at the time of the adjustment of the set as a whole. 2.2 Measuring instruments, jigs, and tools The measuring instruments, jigs, and tools required at the time of the adjustment of the unit to be adjusted shall be as specified below.

  • Page 39: Set Adjustments

    All manuals and user guides at all-guides.com 3. Set adjustments 3.1 Power ON 1) Insert the AC power cable in a wall outlet, or press the POWER key thereafter. Confirm that the LED is lit in amber (or that an OSM of [NO SIGNAL] is displayed). * The product shall be regarded as an NG item unless the LED is lit in amber even when the AC power cable is inserted in a wall outlet or the POWER key is pressed.

  • Page 40: Factory Mode

    All manuals and user guides at all-guides.com 3.2 Factory mode Mention the contents of the service menu letter Warning message Color of frame Service: Cyan How to enter Service mode 1. Open Information menu (Signal information) 2. Press “3”+”4”+”RESET” 3. Indicate warning message 4.
  • Page 41 All manuals and user guides at all-guides.com Page2: The page can adjust RGB offset and gain. 1. Press 3 or 4 to move cursor on AUTO GAIN or AUTO OFFSET. 2. Press “+” or “-“ can auto balance. How to exit Service mode Press exit key and then close OSM menu (Service mode) When turn off monitor in Service mode, it should exit from Service mode.
  • Page 42 All manuals and user guides at all-guides.com Page 3 : F/W ver Indicate F/W version : Auto ADJUST COUNT Indicate total time that Auto Adjustment (Contrast, Auto adjust) is executed. Value should be cleared by factory reset in Service mode menu. : OSM Menu Change Bar or Number of User menu should be selected in Factory mode menu.
  • Page 43 All manuals and user guides at all-guides.com Page 4 In this page, it is possible to modify the display style of the OSM menu. 1) Press the 3 (left) key or the 4 (right) key to adjust the cursor to the DESTINATION, MODEL TYPE, DESIGN, or the VCO TYPE.

  • Page 44: Factory Reset And Auto Contrast

    All manuals and user guides at all-guides.com 3.3 Factory reset and auto contrast 1) To display information of OSM on LCD screen. 2) Press “RIGHT” + “LEFT” + “RESET” key at same time. 3) LCD screen display warring message. 4.1) Press “exit” key will exit factory mode. 4.2) Press “NEXT”...
  • Page 45 All manuals and user guides at all-guides.com 7) Move make to item 2 and change input video pattern to gray scale. 8) Move make to AUTO GAIN and AUTO OFFSET. 9) Press “PLUS” or “MINUS” key can adjust RGB offset and gain. 10) Exit factory mode press “exit”...

  • Page 46: Setting Method

    All manuals and user guides at all-guides.com 4. VG-829 Setting Method Signal VG-829 Mode DOT CLOCK [MHz] 78.75 TOTAL [DOT] 1312 DISP [DOT] 1024 SYNC PULSE [DOT] BACK [DOT] HDstrat [DOT] HDwidth [DOT] INTERLACE TOTAL [H] DISP [H] SYNC PULSE [H] BACK PORCH [H] EQPfp [H] EQPbp [H]...
  • Page 47 All manuals and user guides at all-guides.com INSPECTION 1. Inspection of PLUG & PLAY communication and OSM "MONITOR INFORMATION" for model name/ serial number 1.1 A construction of System This system should be connected as shown below. P R O G R A M P ro g ra m D is k P A R T N o .
  • Page 48 All manuals and user guides at all-guides.com 1.4 Operational procedures 1. Start PNP.EXE from DOS mode or DOS pronto of Windows. 2. Operation key assignment • Determine the operation mode with the F1 ~ F9 and ESC keys. F1: (Select Model) Setting file changeover for respective models. F4: (Read) EDID data for reading.
  • Page 49 All manuals and user guides at all-guides.com 1.5 EDID data file The EDID data file text is shown below. When you write or inspect EDID for this monitor, the following table can be used. file name : EDID550V.TXT Table 1.5 Data list Week of manufacture = Month of manufacture ×...
  • Page 50 All manuals and user guides at all-guides.com 2. External inspection on the LCD module Inspection condition is approximately 15-50cm Viewing angle is normal to the LCD panel. Ambient temperature is in the room temperature. Ambient illumination is 300-500Lux. Display characteristics Defect type Criteria Dark / Bright Spot...
  • Page 51 All manuals and user guides at all-guides.com Note(1): Bright dot defect description Two adjacent Type1 Type2 Type3 Note(2): Dark dot defect description Two adjacent Type1 Type2 Type3 Note(3): Dark dot defect description Three adjacent Type1 Type2 Type3 Type4...
  • Page 52 All manuals and user guides at all-guides.com Not(4): Minimum distance between dot defect Bright dot to bright dot <15mm Dark dot to dark dot <10mm Bright dot to dark dot <10mm Note(5): “Average Diameter” description Dusts would be judged by “Average Diameter” under vertical high ≥0.1mm and horizontal width ≥0.1mm condition.
  • Page 53 All manuals and user guides at all-guides.com 3. Safety Tests Perform the following inspection tests in accordance with the standards set forth in Common Electrical Safety Inspection Standards for Information Processing Device & Office Equipment (DSQS-009-103). Destination : World wide Applicable Regulations : UL1950, CSA C22.2 No 950 (C-UL), DHHS, TUV (EN60950), CE, PTB Classification :...
  • Page 54 All manuals and user guides at all-guides.com 3.3 Leakage Current ( It is applied to both the PSU built-in set and the set with AC adapter. ) Perform the tests at the points indicated below and make sure that the leakage current is within the prescribed range.
  • Page 55 All manuals and user guides at all-guides.com TROUBLE SHOOTING TABLE OF CONTENTS Page 1. No display of screen (Screen is black, color of LED is amber) ------------------------- 6-2 2. Nothing displays on screen (Screen is black, color of LED is green) ----------------- 6-3 3.

  • Page 56: No Display Of Screen (Screen Is Black, Color Of Led Is Amber)

    All manuals and user guides at all-guides.com 1. No display of screen (Screen is black, color of LED is amber) When a signal isn't being inputted, it is indicated with "NO SIGNAL". Does OSM display when you It is indicated with "OUT OF RANGE" at the time of the frequency that it push “NEXT, Adjust or Control”...

  • Page 57: Nothing Displays On Screen (Screen Is Black, Color Of Led Is Green)

    All manuals and user guides at all-guides.com 2. Nothing displays on screen (Screen is black, color of LED is green) Is backlight lit? Refer to section 3 “Checking the backlight unit. Check the video cable for failure. Does computer output RGB Check the host for output signal with all black only.
  • Page 58 All manuals and user guides at all-guides.com Continue Is 5V-source voltage provided to pins 1 and 2 of J2 in MAIN board. Is 5V-source voltage provided to pins 1 and 2 of P803 in SW REG board. Failure point Error in SW REG board. Failure point J2 cable pulled out or disconnected Is a dot clock being outputted under the condition that a...
  • Page 59 All manuals and user guides at all-guides.com Continue Check the LOAD, POL, REV, CPV, OE of positive polarity are ouput on CN2 pin 30, 31, 32, 37, 38. Failure point 1) U3 failure. 2) Printed wire broke between U3 and CN3 pin 30, 31, 32, 37, 38.

  • Page 60: Checking The Back Light Unit

    All manuals and user guides at all-guides.com 3. Checking the back light unit Is 12V-source voltage provided to pins 1 and 2 of P804 in SW REG board? Failure point Error in SW REG board. Is 12V-source voltage provided to pins 1 and 2 of J901 in inverter board? Failure point Inverter cable disconnection.

  • Page 61: Abnormal Screen

    All manuals and user guides at all-guides.com 4. Abnormal screen Check the R, G, B video signal from computer Failure point input on D-Sub R,G,B connector. 1) No R, G and B video signal output from host computer. Check computer. 2) Video signal cable disconnection.
  • Page 62 All manuals and user guides at all-guides.com Continue Check the CPH clock output to CN2 and CN3 pin 26 from U3 pin 123 at TTL level. Failure point Printed wire broke between U3 pin 123 and CN2, CN3 pin 26. Proceed section 9 “Checking the resolution change IC movement”.

  • Page 63: No Osm Display

    All manuals and user guides at all-guides.com 5. No OSM display Check the output of pulse from U3 pin105 ~118 and pin 124 ~ 140 when press NEXT, ADJUST or CONTROL key. Printed wire broke between U3 pin105 ~ 118, 124 ~ 140 and CN2, CN3.

  • Page 64: Abnormal Auto Adjustment

    All manuals and user guides at all-guides.com 6. Abnormal Auto adjustment Check the input of pulse from U3 pin 49 ~ 61, 67 ~75. Check the output of pulse from U6 pin 3, 4, U7 pin 3, 4, 7, 8, 13, 14, 17, 18. Failure point Check the output of (1) Printed wire broke between...

  • Page 65: Abnormal Plug And Play Operation

    All manuals and user guides at all-guides.com 7. Abnormal plug and play operation 7.1 Abnormal DDC2 Confirm the output of serial data on U9 pin 6 synchronize SCLK at TTL level. Failure point U9 failure. Failure point 1) The host machine isn't communicating in DDC2 mode. 2) The video cable may have failed or may not to have connections for DDC.

  • Page 66: Checking The Interface Circuit Of Sync Signal

    All manuals and user guides at all-guides.com 8. Checking the interface circuit of sync signal 8.1 Checking the control circuit of horizontal sync pulse Check the horizontal sync signal on U1 pin 1 at TTL level. Failure point 1) No separate sync or composite sync output by host.

  • Page 67: Checking The Control Circuit Of Vertical Sync Pulse

    All manuals and user guides at all-guides.com 8.2 Checking the control circuit of vertical sync pulse Check the vertical sync signal on U1 pin 11 at TTL level. Failure point 1) No separate sync output signal from the host.(Check the host.) 2) Video cable may have failed.

  • Page 68: Checking The Resolution Change Ic Movement

    All manuals and user guides at all-guides.com 9. Checking the resolution change IC movement Is there +3.3V supply on U3 pins 65, 76, 86, 121, 143, 157, 167, 198, 193, 183, 179, 175, 188. Is there +2.5V supply on U3 pins 5, 7, 10, 11, 12, 15, 18, 21, 22, 25, 28, 31, 35, 36, 42, 63, 76, 88, 119, 141, 159, 162, 163, 166, 169, 170, 189, 190, 196.

  • Page 69: No Power On

    All manuals and user guides at all-guides.com 10. No power on Check the +12V power provided from SW REG board. Failure point SW REG board failure. Check the +5V power from SW REG board. Failure point SW REG board failure. Is LED turned on in amber momentarily when power button is pushed.

  • Page 70: Checking The Operation Of Cpu

    All manuals and user guides at all-guides.com 11. Checking the operation of CPU Is there +5.0V supply on U8 pin 32. Failure point Printed wire broke between output J2 pin1, 2 and U8 power supply pin 32. Is 14.318MHz clock input to U3 pin 3, 4 at TTL level? Failure point Y1 failure.
  • Page 71 All manuals and user guides at all-guides.com CIRCUIT DESCRIPTION TABLE OF CONTENTS Page 1. Power Circuit ------------------------------------------------------------------------------------- 7-2 1.1 Power input block ------------------------------------------------------------------------------ 7-2 1.2 Power control block --------------------------------------------------------------------------- 7-2 2. Microcomputer Control Circuit ---------------------------------------------------------------- 7-2 2.1 Clock circuit ------------------------------------------------------------------------------------- 7-2 2.2 Microcomputer port circuit ------------------------------------------------------------------- 7-2 2.3 PIO (General-purpose port)
  • Page 72 All manuals and user guides at all-guides.com 1. Power Circuit 1.1 Power input block (Circuit diagram: SW REG board) A power supply for internal 12V and 5V are gained from the power connector through the voltage supervisory circuit. 1.2 Power control block 1.2.1 Basic power control (Circuit diagram: MAIN Board ) SW REG board is used to generate the system power.
  • Page 73 All manuals and user guides at all-guides.com 2.3 PIO (General-purpose port) (Circuit diagram: MAIN Board P.3/5) 2.3.1 Key scan status U3 GPIO20 (pin 203) Key2-1 and GPIO 17 (pin 80) Key1-2 output pulses continuously. If Keys are pressed, microcomputer will detect U3 signal to judge which key is pressed. 2.3.2 D-sub cable status signal U3 GPIO5 (PIN96) CABLE-DETECT This is an IN/OUT supervisory signal for the D-sub cable.
  • Page 74 All manuals and user guides at all-guides.com REPLACEMENT PARTS LIST The components specified for Model LCD1550V-1(B) SYMBOL Part No for Compal Part No forNMV DESCRIPTION *** ICS *** SA074140400 79PP0843 S IC SN74LVC14 SOP-14 INV SA011170300 79PP0842 S IC APL1117-33VC-TR SOT- SA010840200 79PP0841 S IC AIC1084-33CE TO252-3...
  • Page 75 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION Q953 SB3467200T3 79PP0634 TR 2SC4672 (SOT-89) Q954 SB3467200T3 79PP0634 TR 2SC4672 (SOT-89) Q955 SB7700200T5 79PP0189 TR 2N7002 Q956 SB934570000 79PP0636 TR SI3457DV-T1 1P TSOP-6 *** DIODES *** BD801 BC3BP08M100...
  • Page 76 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION DE611001500 79PP0615 TACT SW NM555 SKHHBW2720 *** PWB ASSYS *** CTRLBD 461A7367004 79PP0860 FIRMWARE CTRL/B VL-543 LN INVBD 453A7567001 79PP0802 PCBA INVERTER/B VI-543 LN KEYBD 454A5267001 79PP0584...
  • Page 77 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION CABCV FANM5524100 79PP0589 CABLE COVER CABF FANM5515100 79PP0586 CABINET FRONT ASSY CONCV FANM5522100 79PP0619 CONNECTOR COVER NM5522 AB STAF FANM5523100 79PP0620 STAND FRONT NM5523 ABS+PC CHASS EENS5518100 79PP0817...
  • Page 78 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION SD013100AT9 79PP0098 R,CHIP 10H 1/16W +-5% SD0131002T3 79PP0096 R,CHIP 10K 1/16W +-5% SD0131002T3 79PP0096 R,CHIP 10K 1/16W +-5% SD014100009 79PP0850 S RES 1/16W 100 +-1% 0603 SD013220AT4 79PP0101 R,CHIP 22H 1/16W +-5%...
  • Page 79 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION SD013220AT4 79PP0101 R,CHIP 22H 1/16W +-5% SD013220AT4 79PP0101 R,CHIP 22H 1/16W +-5% SD014750A03 79PP0415 CHIP RES 1/16W 75 +-1% R800 CC002A471T2 79PP5133 RES(FUSE)1W 0.2 +-5% R801 SD011510300 79PP0824...
  • Page 80 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION R918 SD013200409 79PP0639 RES 1/16W 2M +-5% R919 SD0114700T3 79PP0091 R,CHIP 470H 1/4W +-5% R920 SD0112000T6 79PP0638 RES 1/4W 200 +-5% R921 SD014210000 79PP0645 RES 1/16W 210 +-1% R950 SD014316300...
  • Page 81 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 SE025102K04 79PP0118 C,CERAMIC 1000P 50V SE053106Z00 79PP0851 S CER CAP 10U 10V Z Y5V 0 SE053106Z00 79PP0851 S CER CAP 10U 10V Z Y5V 0 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80...
  • Page 82 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION SE024820JT4 79PP0554 S CER CAP 82P 50V +-5% SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 CB02206M110 79PP0837 ELE CAP 22U 50V +-20% 105 CB10003M110 79PP0866 ELE CAP 100U 16V +-20% 10 SE027104NT0 79PP0119...
  • Page 83 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No forNMV DESCRIPTION CB10003M110 79PP0866 ELE CAP 100U 16V +-20% 10 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 C901 CB220034204 79PP0612...
  • Page 84 All manuals and user guides at all-guides.com REPLACEMENT PARTS LIST The components specified for Model LCD1550V-1-BK(B) SYMBOL Part No for Compal Part No for NMV DESCRIPTION *** ICS *** SA074140400 79PP0843 S IC SN74LVC14 SOP-14 INV SA011170300 79PP0842 S IC APL1117-33VC-TR SOT- SA010840200 79PP0841 S IC AIC1084-33CE TO252-3...
  • Page 85 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION Q953 SB3467200T3 79PP0634 TR 2SC4672 (SOT-89) Q954 SB3467200T3 79PP0634 TR 2SC4672 (SOT-89) Q955 SB7700200T5 79PP0189 TR 2N7002 Q956 SB934570000 79PP0636 TR SI3457DV-T1 1P TSOP-6 *** DIODES *** BD801 BC3BP08M100...
  • Page 86 GA020000170 79PP0867 PWR CORD SP022X2.0MXIS14 VA801 DC350001700 79PP0770 ABSORBER PANASONIC ERVZ07 BD114P3M010 79PP0610 CRYSTAL 14.31818MHZ HC-49 AC600022900 79PP0804 LCD HSD150SX84-B 15" HANNSTAR *** APPEARANCE PARTS *** BASE FANM5517200 79PP0693 BASE ASSY-NEC NM5517 ABS+ CABCV FANM5516200 79PP0606 CABINET COVER ASSY(BK-A) 8-13...
  • Page 87 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION CABF FANM5515200 79PP0605 CABINET FRONT ASSY(BK-A) CABLCV FANM5524200 79PP0607 CABLE COVER ASSY(BK-A) CONCV FANM5522200 79PP0694 CONNECTOR COVER NM5522 AB STAF FANM5523200 79PP0695 STAND FRONT NM5523 ABS+PC CHASS EENS5518100 79PP0817...
  • Page 88 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION SD013100AT9 79PP0098 R,CHIP 10H 1/16W +-5% SD0131002T3 79PP0096 R,CHIP 10K 1/16W +-5% SD0131002T3 79PP0096 R,CHIP 10K 1/16W +-5% SD014100009 79PP0850 S RES 1/16W 100 +-1% 0603 SD013220AT4 79PP0101 R,CHIP 22H 1/16W +-5%...
  • Page 89 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION SD013220AT4 79PP0101 R,CHIP 22H 1/16W +-5% SD013220AT4 79PP0101 R,CHIP 22H 1/16W +-5% SD014750A03 79PP0415 CHIP RES 1/16W 75 +-1% R800 CC002A471T2 79PP5133 RES(FUSE)1W 0.2 +-5% R801 SD011510300 79PP0824...
  • Page 90 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION R918 SD013200409 79PP0639 RES 1/16W 2M +-5% R919 SD0114700T3 79PP0091 R,CHIP 470H 1/4W +-5% R920 SD0112000T6 79PP0638 RES 1/4W 200 +-5% R921 SD014210000 79PP0645 RES 1/16W 210 +-1% R950...
  • Page 91 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 SE025102K04 79PP0118 C,CERAMIC 1000P 50V SE053106Z00 79PP0851 S CER CAP 10U 10V Z Y5V 0 SE053106Z00 79PP0851 S CER CAP 10U 10V Z Y5V 0 SE027104NT0 79PP0119...
  • Page 92 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION SE024820JT4 79PP0554 S CER CAP 82P 50V +-5% SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 CB02206M110 79PP0837 ELE CAP 22U 50V +-20% 105 CB10003M110 79PP0866 ELE CAP 100U 16V +-20% 10 SE027104NT0...
  • Page 93 All manuals and user guides at all-guides.com SYMBOL Part No for Compal Part No for NMV DESCRIPTION CB10003M110 79PP0866 ELE CAP 100U 16V +-20% 10 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 SE027104NT0 79PP0119 C,CERAMIC 0.1U 16V -20+80 C901 CB220034204 79PP0612...
  • Page 94 All manuals and user guides at all-guides.com BLOCK DIAGRAM LCD1550V / LCD1550V-BK (LA-15R02-1 / LA-15R02-1-BK) INTERFACE BOARD...
  • Page 95 All manuals and user guides at all-guides.com FBM-L11-160808-280LMT PC_R RIN_P RIN_P 100 1% 75 1% 2.2pF# PC_R and PC_B swap RIN_N RIN_N (for layout). 5VCC FBM-L11-160808-280LMT PC_G GIN_P GIN_P 100 1% 75 1% 2.2pF# GIN_N GIN_N 5V_DDC CABLE CABLE-DETECT CABLE FBM-L11-160808-280LMT PC_B BIN_P...
  • Page 96 All manuals and user guides at all-guides.com RST# RST# KEY2-4 KEY2-4 KEY2-3 KEY2-3 KEY2-2 KEY2-2 1. R24 33 ohm change to 47 ohm and R25 33 ohm change to KEY2-1 KEY2-1 DDC_SCL 0 ohm => to solve H. SIZE move issue. (Sage FAE suggestion) DDC_SCL DDC_SDA DDC_SDA...
  • Page 97 All manuals and user guides at all-guides.com 5VCC 5VCC 0.1uF 5VCC RST# MCAD[16..17] MCAD[16..17] MCAD16 MCA16 Reset 0.1uF MCAD17 MCA17 LED-Y LM810M3X-4.38 DTC124EK LED-G KEY1-1 KEY1-1 KEY1-2 KEY1-2 KEY2-1 KEY2-1 KEY2-2 KEY2-2 MCALE KEY2-3 MCALE KEY2-3 KEY2-4 KEY2-4 74HCT373 COLLECTOR E&T_96113-1013 LM810M3X-4.38 5VCC...
  • Page 98 All manuals and user guides at all-guides.com APL1117-33 5VCC 3.3VCC 5VCC 0.1uF 100uF/16V 0.1uF 0.01uF 22uF/50V 4.7K 4.7K Vout AIC1084CE-3.3 EP_SDA 3.3VLCD APL1117-3.3 EP_SDA SOT-223 EP_SCL CTL-I2C EP_SCL 2N7002 0.1uF 0.1uF 0.01uF DDC_SDA GND Vout DDC_SDA 100uF/16V 220uF/16V DDC_SCL DDC_SCL Vout AIC1084CE-3.3 74HC4066...
  • Page 99 All manuals and user guides at all-guides.com VDD+9V VDD+9V RP1 22 47pF PD35 PD34 PD33 PD32 RP2 22 47pF PD31 ICPH CPH1 ICPH PD30 PD29 PD28 RP3 22 47pF 10pF PD27 PD26 PD25 PD24 RP4 22 47pF PD23 PD22 CPH2 CPH1 CPH1 CPH1...
  • Page 100 All manuals and user guides at all-guides.com L841 CHOKE P802 R800 R841 0.2 1W T801 100 1/2W C841 P801 F801 L801 L802 BD801 fusible EFD25 fusible 1000P/1KV CL900006805 CL900006805 2KBP08M R803 T2A/250V C846 510K/1206 R806 R801 VA801 C845 0.1uf - 5 10K/1206 C803 C806 P803...
  • Page 101 All manuals and user guides at all-guides.com T911 J911 F901 VBULK1 EFD20(8:8:2:1200:10uH) C915 JST SM02(8.0) B-BHSS-1-TB ICP S2.3 33P/6.3KV/NPO J901 C903 98115-0603 105/16V/K/X7R 0805 D911 L911 EC10QS04 245UH/A99-1570 C901 R916 D912 220u / 16v 1K/1206 C914 BAV99 154K /100V PPS Q911 Q916 2SC2411K...

This manual is also suitable for:

Multisync lcd1550v-1-bMultisync lcd1550v-1-bkMultisync lcd1550v-1b-bMultisync lcd1550v-1b-bk

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