NEC MultiSync LCD1525VA User Manual Download

Page: 1 / 109

COLOR MONITOR

MultiSync



LCD1525V

MODELS LCD1525V (A) / (B)

NEC Corporation

200004
08109388
08109389

SERVICE MANUAL

PART NO. 599910514

This models changes an original model (LA-1527HMW (A) / (B) : product
made from NEC) into the product made from LITE-ON.

When the factory mark of a serial bar code label is "C", it is an original
model, and when a factory mark is "U", it is a model made from Lite-ON.

Refer to page 2-1 SERIAL NUMBER INFORMATION.

LA-1527HMW: Factory mark: C

Maintenance is performed by the original service manual

(Part No.599910487).

Factory mark: U
Maintenance is performed using this service manual.

LCD1525V :

Summary of Contents for MultiSync LCD1525VA

Page 1: ... NEC into the product made from LITE ON When the factory mark of a serial bar code label is C it is an original model and when a factory mark is U it is a model made from Lite ON Refer to page 2 1 SERIAL NUMBER INFORMATION iLA 1527HMW Factory mark C Maintenance is performed by the original service manual Part No 599910487 Factory mark U Maintenance is performed using this service manual iLCD1525V ...

Page 2: ...the personnel that un insulated voltage within the unit may have sufficient magnitude to cause electric shock This symbol alerts the personnel that important literature concerning the operation and maintenance of this unit has been included Therefore it should be read carefully in order to avoid any problems PRODUCT SAFETY CAUTION 1 When parts replacement is required for servicing always use the m...

Page 3: ...NTS 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 ...

Page 4: ...er s Manual Only the point is mentioned 1 A Version MultiSync LCD1525V User s Manual MultiSync LCD1525V User s Manual NEC LCD Series You can register your product online at www nectech com productregistration ...

Page 5: ...re FCC compliance 2 Please use the supplied AC Adapter UP06051120 3 Shielded video signal cable Use of other cables and adapters may cause interference with radio and television reception 2 This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful in...

Page 6: ...Video Signal Cable User s Manual Remember to save your original box and packing material to transport or ship the monitor Power Cord MultiSync LCD1525V MultiSync LCD1525V monitor with Video Signal Cable and AC Adapter MultiSync LCD1525V User s Manual MultiSync LCD1525V User s Manual User s Manual You can register your product online at www nectech com productregistration ...

Page 7: ...r Figure C1 Place the Video Signal Cable under Clip A Then place AC Adapter Cable under Clip B Replace connector cover and cable cover NOTE Incorrect cable connections may result in irregular operation damage display quality components of LCD module and or shorten the module s life 4 Connect one end of the power cord to the MultiSync LCD Series monitor and the other end to the power outlet Figure ...

Page 8: ...1 5 MultiS 4 Figure E 1 Figure C 1 Figure D 1 Clip A Clip B Power Switch Quick Start cont ...

Page 9: ...1 6 5 Quick Start cont ...

Page 10: ...hted menu the factory setting NOTE When RESET is pressed a warning window will appear allowing you to cancel the reset function Brightness and Contrast Brightness Adjusts the overall image and background screen brightness Contrast Adjusts the image brightness in relation to the background Auto Adjust Corrects the image displayed for non standard video inputs Auto Adjust Automatically adjusts the P...

Page 11: ... 10 20 30 60 and 120 seconds OSM Lock Out This control completely locks out access to all OSM control functions When attempting to activate OSM controls while in the Lock Out mode a screen will appear indicating the OSM controls are locked out To activate the OSM Lock Out function press PROCEED then and hold down simultaneously To de activate the OSM Lock Out press PROCEED then and hold down simul...

Page 12: ...ed AC Adapter Do not place any objects onto the AC Adapter and do not use the AC Adapter outdoors The inside of the flourescent tube located within the LCD monitor contains mercury Please follow the bylaws or rules of your municipality to dispose of the tube properly In UK use a BS approved power cord with molded plug having a black 5A fuse installed for use with this monitor If a power cord is no...

Page 13: ... document holder placed close to the screen Position whatever you are looking at most of the time the screen or reference material directly in front of you to minimize turning your head while you are typing 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 bene...

Page 14: ...8 at 60 Hz to 75 Hz NEC cites recommended resolution at 75 Hz for optimal display performance Active Display Area Horizontal 307 mm 12 1 inches Dependent upon signal timing used Vertical 230 mm 9 1 inches and does not include border area Power Supply AC 100 240 V 50 60 Hz Current Rating 0 6 A 100 120 V 0 3 A 220 240 V Dimensions 370 mm W x 325 mm H x 151 mm D 14 6 inches W x 12 8 inches H x 5 9 in...

Page 15: ...ey Examples include OSM controls for quick and easy image adjustments tilt base for preferred angle of vision small footprint and compliance with MPRII guidelines for lower emissions Plug and Play The Microsoft solution with the Windows 95 98 operating system facilitates setup and installation by allowing the monitor to send its capabilities such as screen size and resolutions supported directly t...

Page 16: ...splay devices NEC Technologies recommends using a screen saver at regular intervals whenever the screen is idle Image is unstable unfocused or swimming is apparent Signal cable should be completely attached to the computer Use the OSM Image Adjust controls to focus and adjust display by increasing or decreasing the fine total When the display mode is changed the OSM Image Adjust settings may need ...

Page 17: ...s 95 98 INF File http cssweb nectech com common drivers htm then download the file NECMSINF ZIP FastFacts Information 630 467 4363 INFORMATION DESCRIPTION DOCUMENT Glossary Definition of terms related 900203 to functions features and installation of the MultiSync monitor More Information Names and addresses of 900204 other groups involved in standards and features of the MultiSync monitor Macintos...

Page 18: ...ction All Products returned to NECTECH for service MUST have prior approval which may be obtained by calling 1 800 632 4662 The Product shall not have been previously altered repaired or serviced by anyone other than a service facility authorized by NECTECH to render such service the serial number of the product shall not have been altered or removed In order to be covered by this warranty the Pro...

Page 19: ...ing scheme was developed as a joint effort by the TCO The Swedish Confederation of Professional Employees Svenska Naturskyddsforeningen The Swedish Society for Nature Conservation and Statens Energimyndighet The Swedish National Energy Administration The requirements cover a wide range of issues environment ergonomics usability emission of electrical and magnetic fields energy consumption and elec...

Page 20: ...ercury is sometimes found in batteries relays and switches Mercury damages the nervous system and is toxic in high doses TCO 99 requirement states that batteries may not contain any Mercury It also demands that no mercury is present in any of the electrical or electronics components associated with the display unit CFCs freons CFCs freons are sometimes used for washing printed circuit boards CFCs ...

Page 21: ...r Step 1 Auto Adjust your MultiSync LCD monitor Step 2 Make sure that your computer is set up for 1024x768 resolution Open the Display Properties window by following this mouse click sequence 1 1 1 1 1 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 indicated by the numbered arrows below Step 3 Auto Proceeding of Auto Adjust As soon as your computer is set to 1024x768 resolution the monitor automatically ...

Page 22: ...1 19 2 B Version User s Manual ...

Page 23: ...lows you to adjust the colours on your screen and customize the colour accuracy of your monitor to a variety of standards OSM On Screen Manager Controls Allow you to quickly and easily adjust all elements of your screen image via simple to use on screen menus ErgoDesign Features Enhance human ergonomics to improve the working environment protect the health of the user and save money Examples inclu...

Page 24: ...monitor energy costs reducing emissions and lowering the air conditioning costs of the workplace Multiple Frequency Technology Automatically adjusts monitor to the display card s scanning frequency thus displaying the resolution required FullScan Capability Allows you to use the entire screen area in most resolutions significantly expanding image size E 2 Introduction to the NEC MultiSync LCD1525V...

Page 25: ...ultiSync LCD1525V AC Power Cord AC Adapter Type UP06051120 Video Signal Cable User s Manual Remember to save your original box and packing material to transport or ship the monitor Contents E 3 MultiSync LCD1525V MultiSync LCD1525V monitor with video signal cable and AC Adapter Power Cord ...

Page 26: ... slots as they may touch dangerous voltage points which can be harmful or fatal or may cause electric shock fire or equipment failure Do not place any heavy objects on the power cord Damage to the cord may cause shock or fire Do not place this product on a sloping or unstable cart stand or table as the monitor may fall causing serious damage to the monitor The power cable connector is the primary ...

Page 27: ... your local municipality to dispose of this tube properly Immediately unplug your monitor from the wall outlet and refer servic ing to qualified service personnel under the following conditions When the power supply cord or plug is damaged If liquid has been spilled or objects have fallen into the monitor If the monitor has been exposed to rain or water If the monitor has been dropped or the cabin...

Page 28: ...tor at a 90 angle to windows and other light sources to minimize glare and reflections Adjust the monitor tilt so that ceiling lights do not reflect on your screen If reflected light makes it hard for you to see your screen use an anti glare filter Clean the LCD monitor surface with a lint free non abrasive cloth Avoid using any cleaning solution or glass cleaner Adjust the monitor s brightness an...

Page 29: ... the appropriate connec tor on the back of the monitor Figure C 1 Place the Video Signal Cable under Clip A Then place AC Adapter Cable under Clip B Replace connector cover and cable cover NOTE Incorrect cable connections may result in irregular operation damage display quality components of LCD module and or shorten the module s life 4 Connect one end of the power cord to the MultiSync LCD Series...

Page 30: ...1 27 E 8 Installation Figure A 1 Figure B 1 15 pin mini D SUB Mac Adapter not included 15 pin mini D SUB ...

Page 31: ...1 28 Installation E 9 MultiSyn Figure D 1 Figure E 1 Figure C 1 Clip B Clip A Power Button ...

Page 32: ...1 29 E 10 Installation ...

Page 33: ...nu Exits the OSM controls Moves the highlighted area up down to select one of the controls Moves the highlighted area left right to select control menus Has no function Resets the highlighted control menu to the factory setting Sub Menu Exits to the OSM main menu Moves the highlighted area up down to select one of the controls Moves the bar left right to increase or decrease the adjustment Activat...

Page 34: ...n Controls horizontal and vertical image position within the display area of the LCD 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 Auto Adjust Automatically sets the horizontal and vertical image posi tion within the display area of the LCD Image Adjust H size Adjusts the horizontal size ...

Page 35: ...our screen Selecting OSM Location allows you to manually adjust the position of the OSM control menu left right up or down OSM Turn Off The OSM control menu will stay on as long as it is in use In the OSM Turn Off sub menu you can select how long the monitor waits after the last touch of a button to shut off the OSM control menu The preset choices are 10 20 30 60 and 120 seconds OSM Lock Out This ...

Page 36: ...set by highlighting the control to be reset and pressing the RESET button Resolution Notifier This optimal resolution is 1024 x 768 If ON is selected a message will appear on the screen after 2 minutes notifying you that the resolution is not at 1024 x 768 Information Display Mode Provides information about the current reso lution display and technical data including the preset timing being used a...

Page 37: ... white luminance typical 200 1 contrast ratio typical Analog 0 7 Vp p 75 Ω Separate sync TTL Level Horizontal sync Positive Negative Vertical sync Positive Negative 16 194 277 colours with dithering Depends on the graphics board 24 8 kHz to 60 0 kHz Automatically 56 2 Hz to 75 0 Hz Automatically 720 x 400 VGA text 640 x 480 at 60 Hz to 75 Hz 800 x 600 at 56 Hz to 75 Hz 1024 x 768 at 60 Hz to 75 Hz...

Page 38: ...terpolated Resolutions When resolutions are shown that are lower than the pixel count of the LCD module text may appear different This is normal and necessary for all current flat panel technologies when displaying non native resolutions full screen In flat panel technolo gies each dot on the screen is actually one pixel so to expand resolutions to full screen an interpolation of the resolution mu...

Page 39: ...d settings Check the signal cable connector for bent or pushed in pins Unplug the power cord of the monitor from the AC outlet to turn off and reset the monitor or simultaneously press the RESET and Power buttons Image persistence is when a ghost of an image remains on the screen even after the monitor has been turned off Unlike CRT monitors LCD monitors image persistence is not permanent To allev...

Page 40: ...need to be re adjusted Check the monitor and your display card with respect to compatibility and recommended signal timings If your text is garbled change the video mode to non interlace and use 75 Hz refresh rate Power Switch should be in the ON position and power cord should be connected Make certain the computer is not in a power saving mode touch the keyboard or mouse Use the OSM Image Adjust ...

Page 41: ... ASSIGNMENTS App A PIN ASSIGNMENTS A 1 MINI D SUB 15 P Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 LCD1525V RED GREEN BLUE NO CONNECTION GROUND GROUND GROUND GROUND 5V DDC GROUND GROUND SDA H SYNC H V SYNC V SYNC SCL ...

Page 42: ... x 480 640 x 480 800 x 600 800 x 600 1024 x 768 1024 x 768 1024 x 768 Vertical Frequency Hz 56 42 59 99 70 09 70 09 56 25 60 32 66 61 72 81 75 00 75 00 72 19 60 00 70 07 75 03 Horizontal Frequency kHz 24 83 31 47 31 47 31 47 35 16 37 88 35 00 37 86 37 50 46 88 48 08 48 36 56 48 60 02 Pixel Frequency MHz 21 05 25 18 28 32 28 32 36 00 40 00 30 24 31 50 31 50 49 50 50 00 65 00 75 00 78 75 ...

Page 43: ...MultiSync LCD monitor Step 1 Auto Adjust your MultiSync LCD monitor Step 2 Make sure that your computer is set up for 1024x768 resolution Open the Display Properties window by following this mouse click sequence 1 1 1 1 1 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 indicated by the numbered arrows below Step 3 Auto proceeding of Auto Adjust As soon as your computer is set to 1024x768 resolution the mo...

Page 44: ...g g g g g g g g Manufactured Year Last digit Manufactured Month January to September 1 to 9 October X November Y December Z Factory mark LITEON U EX SERIAL BER CODE LABEL MODEL LCD1525V SERIAL NO 00001 on ward Start from 00001 when month is changed Model mark LCD1525V A A LCD1525V B B ...

Page 45: ...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 Disassembly is the opposite process of assembly Photo 1 Screw A AC Adapter Cover Cable Cover Connector ...

Page 46: ...3 2 Photo 2 Photo 3 Screw B Screw C HOOK ...

Page 47: ...3 3 Photo 4 Photo 5 Screw D Screw E FUNCTION BD ASSY P601 Screw E Screw E ...

Page 48: ...3 4 Photo 6 Screw E P306 P305 INTERFACE BD ASSY P308 P309 CN3 INVERTER DC AC 12V Screw G CN2 Screw Special HEX Screw E ...

Page 49: ...stment 4 2 1 1 Measuring equipment used 4 2 1 2 Power supply voltage 4 2 1 3 Aging 4 2 1 4 Input Signal 4 2 2 Set Adjustment 4 2 2 1 Power supply turn on 4 2 2 2 Adjustments 4 2 2 2 1 How to open the service menu 4 2 2 2 2 Contrast adjustment 4 3 3 VG 819 Setting Method 4 4 ...

Page 50: ...d amber LEDs even after the AC cable plug has been inserted in a wall outlet or the POWON key has been pressed such a product shall be regarded as a defective one 2 Enter Signal 20 and confirm that the LED is lit in green If the LED is not lit in green at that time such a product shall be regarded as a defective one 3 Press the PROCEED key Confirm that the OSD is displayed on the screen 2 2 Adjust...

Page 51: ...ET and B OFFSET change in the meantime Then using the 5 and 6 keys adjust the HIGHLIGHT to AUTO CONT MAX and press the PROCEED key Confirm that the values at the right of R CONT MAX G CONT MAX and B CONT MAX change in the meantime 5 Using the 3 and 4 keys select Tag 1 of the service menu and provide a display of the FACTORY PRESET screen 2 HOURS RUNNING ON 0 H9 M OFF 11 H19 M B135 REV BC CPU TS87C...

Page 52: ...YNC PULSE H 3 BACK PORCH H 28 EQPfp H 0 EQPbp H 0 SERRATION H OFF EDP H OFF VDs H 0 V VBf H 0 OUTPUT MODE ANALOG NRZ RZ NRZ CV HS POS VS POS CS NEG HD NEG VD NEG RGB POS HT POS C NEG VIDEO 0 70V Set up 0 00V OUTPUT Sync 0 30V PAT SEL GRAY CHARA PATTERN Format Code Font Cell 1 82 16 16 16 16 GRAY Direction 0 L0 0 L1 17 L2 34 L3 51 L4 68 L5 85 L6 102 L7 127 L8 143 L9 159 LA 175 LB 191 LC 207 LD 223 ...

Page 53: ... vertical synchronization frequency is between 55Hz and 25kHz Horizontal synchronization frequency should be set to reasonable value example 31 5kHz 2 Power ON procedure First put the floppy disk for PnP Inspection into PC and turn on PC Turn on Fixture Make sure that fixture s LED blinks on and off Turn on signal generator and monitor 3 Starting PC Software Inspection of PnP communication To chec...

Page 54: ...ore writing EDID data inspecting DDC1 and DDC2B If the fixture s LED does not flash on and off turn off and turn on the monitor and the fixture 1 4 Error Messages Start Bit Error This message is displayed when the start bit is not H while sending data from PC to MPU on the fixture This error will be caused by noise etc on the line Command Error This message is displayed when the different command ...

Page 55: ... 18 50 3C 08 00 0A 20 20 20 20 20 20 00 00 00 FC 00 4E 60 45 43 20 4C 43 44 31 35 32 35 56 0A 00 00 00 FF 70 00 39 3 39 30 30 32 30 35 43 41 0A 20 20 20 00 79 4 Table 1 5 Data list Management number EDID 128 Note 1 address 10h Week of manufacture Month of manufacture 4 Note 2 address 11h Year of manufacture 1990 Notes 3 address 71h 7Dh Serial Number ASCII coded If less than 13 char terminate with ...

Page 56: ...ots Not allowed Total amount of Dark dot 8 Max minimum distance between dots 15mm 2 1 3 Total amount of Dot Defects 10 Max including bright dark dot defects NOTE a Every dot herein means Sub pixel each Red Green or Blue Color b Bright Dark dots are larger than half sub pixel Dots smaller than half sub pixel are not counted as defect dots 2 2 Polarizer Defects Items Criteria Scratch Linear 0 05 W 0...

Page 57: ...N 6 NOTE D Average Diameter D a b 2 W Width L Length N Quantity Linear a 2b Circular a 2b Unit mm 2 4 Line defect All kinds of line defects such as vertical horizontal or cross are not allowed 2 5 Bezel Appearance Scratches minor bents stains particles on the Bezel frame are not considered as a defect b a ...

Page 58: ...ng month Note The manufacturing Month is on the LCDs as Supplier s serial No b Repair Warranty The repair warranty is Twelve 12 Months from repaired month for repaired LCDs Note The Label for repair will be added after repairing Rev 1 0 18 Feb 1999 Rev 2 0 4 Mar 1999 c Serial Number Information Lot Mark A B C D E F G H I J K L A B DIVSION CODE C D E MODEL CODE F YEAR G MONTH H I J K L SERIAL NO No...

Page 59: ...rescent lamp during replacement it could result in uneven lighting so it is recommend that replacement be performed in a clean room or on a clean bench class C Also the LCD module could be damaged due to static electricity so it is recommended that an ionizer or other anti static electricity equipment be used 1 2 Preparation 1 Put on the finger protectors and ESD wrist strap 2 Turn on the ionizer ...

Page 60: ...3 Replacement procedures To be explained according to the sequence of replacement work 1 Put the TFT LCD module on the working table with its display plane facing upwards Photo 1 2 A screw is removed Photo 2 ...

Page 61: ... out the back light unit Photo 3 Photo 4 4 Then take out the lower side back light unit Turn the LCD module upside down and follow the procedures 2 to 3 5 Photo 5 shows the condition that the two upper and lower lamp units have been dislodged Photo 5 ...

Page 62: ...o 7 8 Insert another back light unit according to the procedures of 6 and 7 above 9 Check items h Confirm that everything is in the same condition as original Photo 1 h Confirm that the display plane of the LCD module is free from flaws dust and foreign substance h Incorporate the LCD module in the main unit connect the connector and turn on the power supply h Confirm the lighting of the fluoresce...

Page 63: ...y 6 9 6 Abnormal Auto adjustment 6 11 7 Abnormal plug and play operation 6 12 7 1 Abnormal DDC1 6 12 7 2 Abnormal DDC2 6 12 8 Checking the interface circuit of sync signal 6 13 8 1 Checking the control circuit of horizontal sync pulse 6 13 8 2 Checking the control circuit of vertical sync pulse 6 13 9 Checking the resolution change IC movement 6 14 10 No power on 6 15 11 Checking the DC DC convert...

Page 64: ...d with VIDEOINPUT It is indicated with OUT OF RANGE at the time of the frequency that it can t be distinguished YES NO Pressed No OSM display section Check if the sync signal from Computer is output and if the video cable is connected normally OK NG Input the sync signal of computer or change the cable Proceed Checking the resolution change IC movement section ...

Page 65: ... NG Proceed Abnormal screen section Refer Checking the backlight unit section Check the video cable for failure Check the host for output signal with all black only 1 Change pattern of video signal output on the host 2 Reconnect the video cable 3 Change the video cable Check if the LCD video signal cable is connected between the MAIN PWB and LCD module OK NG Failure Point The Cable is disconnected...

Page 66: ...r the condition that a LCD module is connected to P305 pin 44 OK NG Failure point 1 I401 failure 2 Printed wire broke between I401 and P305 pin 44 Check the H sync pulse of negative polarity is output on P305 pin 38 at TTL level OK NG Failure point 1 I401 failure 2 Printed wire broke between I401 and P305 pin 38 Check the V sync of negative polarity are output on P305 pin 40 OK NG Failure point 1 ...

Page 67: ...nt 1 I401 failure 2 Printed wire broke between I401 and P305 pin 42 Check the data signal output on P305 R G B data pin OK NG Failure point 1 I401 failure 2 Printed wire broke between I401 and P305 data line Failure point 1 The cable broke between P305 and LCD module 2 LCD module failure OK NG ...

Page 68: ...nverter cable disconnection Check the Uc PBIAS signal of the rectangle input I104 pin 3 at TTL high level OK NG Is a H level being output in the TTL level from I201 pin 17 Or is Uc PBIAS signal of the rectangle being output NG Failure point Printed wire broke between I201 pin 17 and I101 pin 3 Check the PWM signal of the input from I201 pin 9 is a PWM signal OK NG Failure point 1 Printed wire brok...

Page 69: ... the case of the Red signal A Green and Blue signal is the same path too 1 Printed wire broke between D Sub R and I401 pin C13 2 R427 short 3 C416 open 4 R424 open Is the pulse of the TTL level being output to P305 P306 from the data line of I401 OK NG Failure point 1 Printed wire broke between I401 data line and P305 P306 2 I401 failure Check the negative horizontal sync pulse output to P305 pin ...

Page 70: ...ive DE pulse output to P305 pin 42 from I401 pin T17 at TTL level OK NG Failure point 1 Printed wire broke between I401 pin T17 and P305 pin 42 2 R313 open 3 C357 short Check the SHFCLK OUTPUT to P305 pin 44 from I401 pin R17 at TTL level OK NG Failure point 1 Printed wire broke between I401 pin R17 and P305 pin 44 2 F301 open 3 F302 open 4 C349 short 5 C358 short Process Checking the resolution c...

Page 71: ... I208 pin 2 2 Printed wire broke between I402 pin 6 and I208 pin 5 3 Printed wire broke between I402 pin 4 and I208 pin 6 Check the input of 5Vp p pulse from I401 pin B7 A8 B8 are same as I402 pin 13 15 17 or check input of 5Vp p pulse from I401 pin C7 is same as I402 pin 12 OK NG Failure point 1 Printed wire broke between I402 pin 12 and I401 pin C7 2 Printed wire broke between I402 pin 13 and I4...

Page 72: ...ync signal on I402 pin 18 at TTL level Failure point 1 Printed wire broke between I401 pin C8 and I402 pin 7 2 C475 open OK NG Check the positive horizontal sync signal on I401 pin B9 at TTL level OK NG Proceed Checking the resolution change IC movement Section Failure point 1 Printed wire broke between I401 pin B9 and I402 pin 18 2 R443 open Check negative vertical sync signal on I402 pin 19 at T...

Page 73: ... pin3 3 Printed wire broke between I401 pin B10 and I201 pin4 4 Printed wire broke between I401 pin A10 and I201 pin5 5 Printed wire broke between I401 pin C10 and I201 pin6 6 Printed wire broke between I401 pin C11 and I201 pin7 Check the input of 3 3Vp p pulse from I401 pin C11 C10 B11 A11 B10 A10 Proceed Checking the resolution change IC movement section ...

Page 74: ... The host machine isn t communicating in DDC1 mode 2 The video cable may have failed or may not to have connections for DDC 3 Between I403 pin 5 and P303 pin 12 may have failed 4 R432 open 5 Cable failure OK NG Confirm the output of serial data on I403 pin 6 synchronize SCLK at TTL level Failure point 1 The host machine isn t communicating in DDC2 mode 2 The video cable may have failed or may not ...

Page 75: ...L level Process Checking the resolution change IC movement section Failure point 1 Video cable may have failed 2 Printed wire broke between P303 pin 13 and I401 pin A1 3 FB402 R437 open OK NG Check the vertical sync signal on I401 pin C1 TTL level Process Checking the resolution change IC movement section Failure point 1 Video cable may have failed 2 Printed wire broke between P303 pin 14 and I401...

Page 76: ... X401 pin 5 at TTL level OK NG Is 3 3V supplied to X401 pin 8 Failure point Print wire broke between X401 pin 5 and I401 pin D1 OK NG Failure point Print wire broke between X401 pin 8 and power supply Failure point X401 failure Is 5 0V supplied to I401 pin A12 at High level OK NG Check the output of 5 0V H pulse from I207 pin 1 OK NG Is 5 0V supplied to I207 pin 2 Failure point Print wire broke be...

Page 77: ... OK NG Failure point AC adapter failure Is LED turned on in amber momentarily when a power button is pushed OK NG Failure point Fuse failure Check if TTL H level is input to Q102 base OK NG Failure point D101 Q101 R101 R102 circuit Proceed Checking the operation of CPU ...

Page 78: ... output from I101 pin 5 6 7 8 OK NG I101 failure Check the input of 12V to the I102 pin1 a Check the output of 3 3V line voltage from I103 pin 2 OK NG Is the output FB108 being inputted to I103 pin 3 OK NG Failure point Printed wire broke between I103 pin 3 and output of FB108 Failure point I103 failure Failure point Printed wire broke between I103 pin 2 and IC 401 power supply pin OK ...

Page 79: ...en output of FB106 and I201 power supply pin Is 20MHz clock input to I201 pin 20 and 21 at TTL level OK NG Failure point X201 failure Check the input of 5V H pulse from I201 pin 10 are same as I208 pin 1 350 msec Typ OK NG Failure point 1 Printed wire broke between I201 pin 10 and I208 pin 1 2 I208 failure I201 failure ...

Page 80: ...em reset LED control circuit 7 2 6 E2 PROM 7 2 7 CPU circuit 7 3 7 1 Dection of POWER switch status 7 3 7 2 Display mode identification 7 3 7 3 User control 7 6 7 4 Control of identification converter LSI IC 14 7 6 7 5 I2 C bus control 7 6 7 6 Power ON sequence 7 7 7 7 Power OFF sequence 7 8 7 8 List of CPU assignments 7 9 8 Inverter Protective circuit for back light 7 10 ...

Page 81: ...are output to IC401 3 Video input circuit The AC coupled video signal is used to clamp the black level at 0V 4 Definition converter LSI peripheral circuit I401 B135 is the definition converter LSI The analog R G B signal input entered from the video input circuit is converted into the digital data of video signal through the incorporated A D converter Based on this conversion this device performs ...

Page 82: ... the mode has been identified through the measurement of horizontal and vertical frequencies the total number of lines is determined with a formula of Horizontal frequency Vertical frequency Total number of lines Final identification can be made by examining the coincidence of the obtained figure with the number of lines for the mode identified from the frequency The boundary number of lines in ea...

Page 83: ...R OTHER 5 800X600 56 33kHz fH 43kHz FV 58Hz 36 000 35 156 56 250 6 800X600 60 58Hz fV 63Hz 40 000 37 879 60 317 7 640X480 66 63Hz fV 68Hz 30 240 35 000 66 611 8 640X480 72 68Hz fV 74Hz 31 500 37 861 72 809 9 640X480 75 74Hz fV SEP 31 500 37 500 75 000 10 720X350 85 SEP 31 500 37 861 85 080 11 720X400 85 SEP 31 500 37 861 85 080 11 720X400 85 OTHER OTHER OTHER 12 800X600 75 43kHz fH 47 2kHz FV 80Hz...

Page 84: ...63Hz 12 63Hz fV 73Hz 14 73Hz fV 78Hz 13 78Hz fV 15 832 624 640 LINE 16 1024 768 768 LINE 870 FV 63Hz 17 63Hz fV 68Hz 18 68Hz fV 73Hz 19 73Hz fV 78Hz 78Hz fV 20 21 1152 864 870 LINE 1031 UN SUPPORT 1280 960 960 LINE 1027 UN SUPPORT 1280 1024 1027 LINE UN SUPPORT Attention 1 Make it the mode 16 by the first HSYNC the VSYNC distinction in the time beyond 640 line when you recognize it with the mode 1...

Page 85: ... turned L Each switch input port is pulled up at outside of ASIC Each parameter is stored in the EEPROM the contents of which are updated as required 7 4 Control of definition converter LSI I401 7 4 1 Ports related to control Pin No I O Signal name Function C9 I IRQ B135 interrupt signal C10 O HCLK B135 serial clock B11 I O HDATA B135 serial data C11 O HFS B135 serial select 7 4 2 Functions Major ...

Page 86: ...H When this H potential is detected the CPU begins to establish the respective power supplies according to the sequence shown below POWER OFF POWER ON LVCC LEDON USBSW INVCNT LVDD MUTE IIC MUTE 3 3V for IC14 DOTCLK 500ms or more 300ms or more Indication is started Less than 10ms 200ms 300ms ...

Page 87: ...e POWER ON signal is turned H When this H potential is detected the CPU begins to turn off the respective power supplies according to the sequence shown below POWER OFF POWER ON LVCC LEDON USBSW INVCNT LVDD MUTE IIC MUTE 3 3V for IC14 DOTCLK 500ms or more 0 1ms 1second or more Less than 10ms ...

Page 88: ...ull up I104 P3 6 18 WR External data memory write strobe I I O port with internal pull up I204 I206 P3 7 19 RD External data memory read strobe I O port with internal pull up I204 20 XTAL2 Crystal 1 Output from the inverting oscillator X201 21 XTAL Crystal 2 X201 22 GRD 23 N C P2 0 24 A8 Address I O port with internal pull up P2 1 25 A9 Address I O port with internal pull up P2 2 26 A10 Address I ...

Page 89: ...tput voltage over 12V higher is connected the control signal from I101 is forcibly connected to the LOW level through D101 RLZ18B Q101 SST33904 and R101 R102 In order to protect the inverter for back light By this treatment oscillation is suspended in the inverter circuit It must be noted that the back light it unlit as a result of the stoppage of inverter oscillation ...

Page 90: ...I402 79PL1044 IC M35072 057FP 20P SSOP I403 79PL1049 IC AT24C21 10PC 2 5 8P TRANSISTORS Q101 79PL1036 TR NPN SST3904 SMD Q102 79PL1036 TR NPN SST3904 SMD Q301 79PL1036 TR NPN SST3904 SMD Q401 79PL1147 TR NPN PMBT2222A SOT 23 Q402 79PL1147 TR NPN PMBT2222A SOT 23 DIODES D101 79PL1035 DIODE ZNR RLZ TE 11 18B D330 79PL1034 DIODE BYS10 45 TR SMD D401 79PL1032 DIODE RLS4148 LL 34 SMD D402 79PL1032 DIOD...

Page 91: ...L151 99 COILS FILTERS FB101 79PL1064 BEAD COREHB 1P4516 600T60 FB102 79PL1064 BEAD COREHB 1P4516 600T60 FB103 79PL1066 CORE BEAD WB453215B121QST FB104 79PL1066 CORE BEAD WB453215B121QST FB106 79PL1066 CORE BEAD WB453215B121QST FB107 79PL1066 CORE BEAD WB453215B121QST FB108 79PL1066 CORE BEAD WB453215B121QST FB301 79PL1148 BEAD CORE HB 1B2012 121JT03 FB302 79PL1148 BEAD CORE HB 1B2012 121JT03 FB304...

Page 92: ... 79PG1000 BACK LIGHT UNIT F101 79PL1131 FUSE SLOW TR5 T 2 5A PC01 79PL0963 POWER CBL 1800GRY WALL PWR 79PL1115 ADAPTER AC DC 12V 4A WHIT V001 79PL0962 VIDEO CBL 1800 NEC GRAY V002 79PL1134 FFC 45P 0 5 2896 ATYPE X201 79PL1053 CRYSTAL 20MHZ HC 49 US X401 79PL1054 OSCILLTOR 50MHZ KNOBS PUSH BUTTONS AA14 79PL1071 PUSH BUTTON APPEARANCE PARTS AA10 79PL1125 STAND BOTTOM FOR NEC DL15 AA11 79PL1135 BASE ...

Page 93: ...05 R205 79PL0996 CHIP R 100H 1 8W J 805 R206 79PL0996 CHIP R 100H 1 8W J 805 R209 79PL1005 CHIP R 4 7KH 1 8W J R307 79PL1012 FRN 22H 1 16W J 8P4R SMD R308 79PL1012 FRN 22H 1 16W J 8P4R SMD R309 79PL1012 FRN 22H 1 16W J 8P4R SMD R310 79PL1012 FRN 22H 1 16W J 8P4R SMD R311 79PL1012 FRN 22H 1 16W J 8P4R SMD R312 79PL1012 FRN 22H 1 16W J 8P4R SMD R313 79PL1002 CHIP R 22H 1 8W J 805 R314 79PL1002 CHIP ...

Page 94: ...L0995 CHIP R 0H 1 8W J 0805 R441 79PL0995 CHIP R 0H 1 8W J 0805 R442 79PL1006 CHIP R 47H 1 8W J 805 R443 79PL1005 CHIP R 4 7KH 1 8W J R444 79PL1005 CHIP R 4 7KH 1 8W J R445 79PL1003 CHIP R 33H 1 8W J 0805 R446 79PL1003 CHIP R 33H 1 8W J 0805 R447 79PL1003 CHIP R 33H 1 8W J 0805 R448 79PL0997 CHIP R 1KH 1 8W F 0805 R449 79PL0995 CHIP R 0H 1 8W J 0805 R450 79PL0995 CHIP R 0H 1 8W J 0805 R451 79PL099...

Page 95: ... Y5V Z SMD C127 79PL1016 ALU 100UF 16V T 105C C128 79PL1030 MC 0 1UF 50V Y5V Z SMD C129 79PL1016 ALU 100UF 16V T 105C C130 79PL1030 MC 0 1UF 50V Y5V Z SMD C131 79PL1029 MC 0 01UF 50V Y5V Z SMD C132 79PL1030 MC 0 1UF 50V Y5V Z SMD C133 79PL1030 MC 0 1UF 50V Y5V Z SMD C134 79PL1016 ALU 100UF 16V T 105C C135 79PL1030 MC 0 1UF 50V Y5V Z SMD C201 79PL1022 MC 33PF 50V NPO J SMD C202 79PL1022 MC 33PF 50V...

Page 96: ...ALU 470UF 25V T 105C C352 79PL1030 MC 0 1UF 50V Y5V Z SMD C353 79PL1029 MC 0 01UF 50V Y5V Z SMD C354 79PL1030 MC 0 1UF 50V Y5V Z SMD C355 79PL1141 MC 100PF 50V NPO J SMD C356 79PL1141 MC 100PF 50V NPO J SMD C357 79PL1141 MC 100PF 50V NPO J SMD C401 79PL1030 MC 0 1UF 50V Y5V Z SMD C402 79PL1030 MC 0 1UF 50V Y5V Z SMD C403 79PL1030 MC 0 1UF 50V Y5V Z SMD C404 79PL1030 MC 0 1UF 50V Y5V Z SMD C405 79P...

Page 97: ...D C447 79PL1030 MC 0 1UF 50V Y5V Z SMD C448 79PL1030 MC 0 1UF 50V Y5V Z SMD C449 79PL1017 ALU 47UF 16V 85C SMD C450 79PL1030 MC 0 1UF 50V Y5V Z SMD C451 79PL1030 MC 0 1UF 50V Y5V Z SMD C452 79PL1017 ALU 47UF 16V 85C SMD C453 79PL1030 MC 0 1UF 50V Y5V Z SMD C454 79PL1030 MC 0 1UF 50V Y5V Z SMD C455 79PL1017 ALU 47UF 16V 85C SMD C456 79PL1030 MC 0 1UF 50V Y5V Z SMD C457 79PL1017 ALU 47UF 16V 85C SMD...

Page 98: ...1UF 16V Y5V M SMD C476 79PL1030 MC 0 1UF 50V Y5V Z SMD C477 79PL1030 MC 0 1UF 50V Y5V Z SMD C478 79PL1030 MC 0 1UF 50V Y5V Z SMD C479 79PL1030 MC 0 1UF 50V Y5V Z SMD C480 79PL1030 MC 0 1UF 50V Y5V Z SMD C481 79PL1143 ALU 4 7UF 25V 85C T SMD C482 79PL1143 ALU 4 7UF 25V 85C T SMD 8 9 ...

Page 99: ...402 79PL1044 IC M35072 057FP 20P SSOP I403 79PL1049 IC AT24C21 10PC 2 5 8P TRANSISTORS Q101 79PL1036 TR NPN SST3904 SMD Q102 79PL1036 TR NPN SST3904 SMD Q301 79PL1036 TR NPN SST3904 SMD Q401 79PL1147 TR NPN PMBT2222A SOT 23 Q402 79PL1147 TR NPN PMBT2222A SOT 23 DIODES D101 79PL1035 DIODE ZNR RLZ TE 11 18B D330 79PL1034 DIODE BYS10 45 TR SMD D401 79PL1032 DIODE RLS4148 LL 34 SMD D402 79PL1032 DIODE...

Page 100: ...151 99 COILS FILTERS FB101 79PL1064 BEAD COREHB 1P4516 600T60 FB102 79PL1064 BEAD COREHB 1P4516 600T60 FB103 79PL1066 CORE BEAD WB453215B121QST FB104 79PL1066 CORE BEAD WB453215B121QST FB106 79PL1066 CORE BEAD WB453215B121QST FB107 79PL1066 CORE BEAD WB453215B121QST FB108 79PL1066 CORE BEAD WB453215B121QST FB301 79PL1148 BEAD CORE HB 1B2012 121JT03 FB302 79PL1148 BEAD CORE HB 1B2012 121JT03 FB304 ...

Page 101: ...9PG1000 BACK LIGHT UNIT F101 79PL1131 FUSE SLOW TR5 T 2 5A PC01 79PL0971 POWER CBL 1900GRY WALL PWR 79PL1115 ADAPTER AC DC 12V 4A WHIT V001 79PL0962 VIDEO CBL 1800 NEC GRAY V002 79PL1134 FFC 45P 0 5 2896 ATYPE X201 79PL1053 CRYSTAL 20MHZ HC 49 US X401 79PL1054 OSCILLTOR 50MHZ KNOBS PUSH BUTTONS AA14 79PL1071 PUSH BUTTON APPEARANCE PARTS AA10 79PL1125 STAND BOTTOM FOR NEC DL15 AA11 79PL1135 BASE PL...

Page 102: ...05 R205 79PL0996 CHIP R 100H 1 8W J 805 R206 79PL0996 CHIP R 100H 1 8W J 805 R209 79PL1005 CHIP R 4 7KH 1 8W J R307 79PL1012 FRN 22H 1 16W J 8P4R SMD R308 79PL1012 FRN 22H 1 16W J 8P4R SMD R309 79PL1012 FRN 22H 1 16W J 8P4R SMD R310 79PL1012 FRN 22H 1 16W J 8P4R SMD R311 79PL1012 FRN 22H 1 16W J 8P4R SMD R312 79PL1012 FRN 22H 1 16W J 8P4R SMD R313 79PL1002 CHIP R 22H 1 8W J 805 R314 79PL1002 CHIP ...

Page 103: ...0995 CHIP R 0H 1 8W J 0805 R441 79PL0995 CHIP R 0H 1 8W J 0805 R442 79PL1006 CHIP R 47H 1 8W J 805 R443 79PL1005 CHIP R 4 7KH 1 8W J R444 79PL1005 CHIP R 4 7KH 1 8W J R445 79PL1003 CHIP R 33H 1 8W J 0805 R446 79PL1003 CHIP R 33H 1 8W J 0805 R447 79PL1003 CHIP R 33H 1 8W J 0805 R448 79PL0997 CHIP R 1KH 1 8W F 0805 R449 79PL0995 CHIP R 0H 1 8W J 0805 R450 79PL0995 CHIP R 0H 1 8W J 0805 R451 79PL0995...

Page 104: ... Y5V Z SMD C127 79PL1016 ALU 100UF 16V T 105C C128 79PL1030 MC 0 1UF 50V Y5V Z SMD C129 79PL1016 ALU 100UF 16V T 105C C130 79PL1030 MC 0 1UF 50V Y5V Z SMD C131 79PL1029 MC 0 01UF 50V Y5V Z SMD C132 79PL1030 MC 0 1UF 50V Y5V Z SMD C133 79PL1030 MC 0 1UF 50V Y5V Z SMD C134 79PL1016 ALU 100UF 16V T 105C C135 79PL1030 MC 0 1UF 50V Y5V Z SMD C201 79PL1022 MC 33PF 50V NPO J SMD C202 79PL1022 MC 33PF 50V...

Page 105: ...ALU 470UF 25V T 105C C352 79PL1030 MC 0 1UF 50V Y5V Z SMD C353 79PL1029 MC 0 01UF 50V Y5V Z SMD C354 79PL1030 MC 0 1UF 50V Y5V Z SMD C355 79PL1141 MC 100PF 50V NPO J SMD C356 79PL1141 MC 100PF 50V NPO J SMD C357 79PL1141 MC 100PF 50V NPO J SMD C401 79PL1030 MC 0 1UF 50V Y5V Z SMD C402 79PL1030 MC 0 1UF 50V Y5V Z SMD C403 79PL1030 MC 0 1UF 50V Y5V Z SMD C404 79PL1030 MC 0 1UF 50V Y5V Z SMD C405 79P...

Page 106: ... C447 79PL1030 MC 0 1UF 50V Y5V Z SMD C448 79PL1030 MC 0 1UF 50V Y5V Z SMD C449 79PL1017 ALU 47UF 16V 85C SMD C450 79PL1030 MC 0 1UF 50V Y5V Z SMD C451 79PL1030 MC 0 1UF 50V Y5V Z SMD C452 79PL1017 ALU 47UF 16V 85C SMD C453 79PL1030 MC 0 1UF 50V Y5V Z SMD C454 79PL1030 MC 0 1UF 50V Y5V Z SMD C455 79PL1017 ALU 47UF 16V 85C SMD C456 79PL1030 MC 0 1UF 50V Y5V Z SMD C457 79PL1017 ALU 47UF 16V 85C SMD ...

Page 107: ...UF 16V Y5V M SMD C476 79PL1030 MC 0 1UF 50V Y5V Z SMD C477 79PL1030 MC 0 1UF 50V Y5V Z SMD C478 79PL1030 MC 0 1UF 50V Y5V Z SMD C479 79PL1030 MC 0 1UF 50V Y5V Z SMD C480 79PL1030 MC 0 1UF 50V Y5V Z SMD C481 79PL1143 ALU 4 7UF 25V 85C T SMD C482 79PL1143 ALU 4 7UF 25V 85C T SMD 8 18 ...

Page 108: ...0 EEPROM I202 ROM I203 SRAM I204 24LC211 I403 OSC 50MHz RESET IC I207 OSC 20MH OSD I402 INVERTER AC ADAPTOR DC JACK OVER VOLTAGE DC_DC CONVERTER 5V 3 3V 12V 5V 5V 5V 5V 5V 3 3V 5V 5V 5V 12V LG 800mA 5V R G B Brnk H V Clck 5V V_SYNC H_SYNC R G B DDC_CLK DDC_DATA POWER RESET PROCEED RIGHT UP DOWN LEFT EXIT LED DC_DC CONVERTER ...

Page 109: ...for Human Potential ...

Search results

Summary of Contents for MultiSync LCD1525VA

Reviews:

Related manuals for MultiSync LCD1525VA

Brands by name

Popular brands

NEC MultiSync LCD1525VA, Service Manual

Search results

Summary of Contents for MultiSync LCD1525VA

Reviews:

Related manuals for MultiSync LCD1525VA

Brands by name

Popular brands