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Nokia 445PRO Service Manual

21” high resolution colour monitor
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Nokia Display Products Oy
P .O.Box 14
FIN---24101 Salo, Finland
21" High Resolution Colour Monitor
445PRO
Level
Main Board module . . . . . .
CRT module . . . . . . . . . . . . .
When re--- ordering manuals, please quote the model name and part number.
Chassis 445N
1
SMA251H
SMY055E
Contents
Service
Monitor Dismantling
Part List
PCB Part List
PCB Layout pictures
ZB1720
01.00

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  Summary of Contents for Nokia 445PRO

  • Page 1 Nokia Display Products Oy Chassis 445N P .O.Box 14 FIN---24101 Salo, Finland 21” High Resolution Colour Monitor 445PRO Contents Service Monitor Dismantling Part List PCB Part List PCB Layout pictures Level Main Board module ..
  • Page 2 445N...

  • Page 3: Table Of Contents

    Service Manual Contents 1. Product Overview 1.1. Technical Specifications 1.2. Certifications 1.2.1. Safety 1.2.2. EMC 1.2.3. X---ray, emissions, environmental, ergonomics 1.3. Preset Display Modes 1.4. S--Capacitor Table 1.5. Monitor Connection 1.6. User Controls 1.7. Menu 2. Site Preparation 2.1. Location 2.2.

  • Page 4: Level

    7. Adjustment Procedure 7.1. Adjustment Flow Diagram 7.2. Preliminary Preparations 7.2.1. High Voltage 7.2.2. Coarse Width 7.3. Geometry 7.4. Grey Scale 7.4.1. The Most Dominant Colour 7.4.2. Low Light 7.4.3. High Light 7.5. Maximum/Minimum Contrast 7.6. Focus 7.7. Convergence 7.7.1. Measuring Conditions 7.7.2.

  • Page 5: Product Overview

    1. Product Overview 445N is a 21 inch monitor. The maximum resolution of 1800 x 1440 makes the monitor suitable for PC, Macintosh and workstation applications in normally heated, ventialed and controlled office/home environment. The monitor has an own power supply with nominal input voltage requirements from 90 V to 264 V.

  • Page 6: Certifications

    1.2. Certifications The monitor has following agency approvals 1.2.1. Safety FIMKO, DEMKO NEMKO, SEMKO UL / USA CSA / Canada TÜV ---GS / Germany PCBC / Poland GOST---R / Russia 1.2.2. EMC FCC---D.O.C. VCCI / Japan CE / Europe 1.2.3. X ---ray, emissions, environmental, ergonomics TÜV ---ERGO / Germany DHHS / USA TCO 99 / Sweden...

  • Page 7: Preset Display Modes

    Video Blanking V Blanking V Active Video V Back Porch V Front Porch V Sync V Sync. Signal 445PRO (445N051, 445N059) Display Mode no N07A85 L91--- 85 L80--- 75 G69--- 85 E54--- 85 C43--- 85 B31--- 70 C31--- 60...
  • Page 8 Quatographic (445N055) Memory location Display Mode NO7A85V NO6A85W L91- -85W N94- -75W I69- -75 F50- -75 C35- -67 C31- -60W H Frequency/kHz 107.101 106.245 91.146 93.755 68.681 49.718 35.000 31.472 H Period/μs 9.337 9.412 10.971 10.666 14.560 20.113 28.571 31.774 H Active Video/μs 6.815 6.972...

  • Page 9: S--Capacitor Table

    1.4. S- -Capacitor table In software version 0.31 and later, S---Capacitor table will be loaded from processor (IC402). f/kHz LIN1 LIN2 31.9 32.8 33.7 34.8 36.1 37.3 38.7 40.0 41.7 43.9 46.3 49.3 52.3 53.2 54.2 55.2 57.8 59.5 60.5 62.0 63.6 65.8...
  • Page 10 76.7 79.5 80.5 81.4 83.9 86.0 88.2 91.2 94.5 97.6 101.0 106.1 111.7 116.7 122.3 445N...

  • Page 11: Monitor Connection

    1.5. Monitor Connection Make sure that the monitor is disconnected from mains and the power switches of the com- puter and all attached devices are turned off before connecting the monitor. Connect the signal cable plug to the videocontroller connector at the back of the computer. Tighten the screws on the plug by hand.

  • Page 12: User Controls

    1.6. User Controls 1. Power switch 2. Power on indicator 3. Menu button 4. Select and adjustment buttons When the power is turned on, the power- -on indicator will light. The colour of the the power--on light indicates the operating state of the monitor. Green: The monitor is in Normal, Stand---by or Suspend operation.

  • Page 13: Menu

    1.7.Menu 1.7.1. Moving in the menu Menu operations are controlled with button and buttons. Call the menu to the screen by pushing the button. Select the header with the buttons. Push to confirm the selection. Adjustment and settings corresponding the header appear below the header field. Select the adjustment with the buttons.
  • Page 14 --- + HORIZONTAL CENTERING PREVIOUS VALUE: ADJUST: --- /+ WIDTH NOKIA 445PRO 75Hz PREVIOUS VALUE: SIZE & POSITION ADJUST: --- /+ SHAPE... NAVI SHARPNESS VERTICAL CENTERING COLOR... MISCELLANEOUS PREVIOUS VALUE: EXIT MENU ADJUST: --- /+ AUTO SHAPE HORIZONTAL CENTERING HEIGHT...
  • Page 15 HORIZONTAL CENTERING WIDTH SIZE & POSITION SHAPE SHARPNESS COLOR VERTICAL CENTERING MISCELLANEOUS CONTRAST BRIGHTNESS HEIGHT HORIZONTAL CENTERING WIDTH VERTICAL CENTERING HEIGHT PRESET RECALL EXIT 1600X1200 85HZ TILT SIZE & POSITION SHAPE SHARPNESS COLOR MISCELLANEOUS CONTRAST BRIGHTNESS ORTHOGONALITY TILT ORTHOGONALITY TRAPEDOIZ TRAPEDOIZ PINCUSHION PINCUSHION BALANCE...

  • Page 16: Site Preparation

    2. Site Preparation 2.1. Location This Monitor is designed for normal office conditions. It is equipped with own power supply. It is not to be serviced or repaired on site 2.2. Troubleshooting Local service facilities should perform simple maintenance such as trimming. More advanced main- tenance and repair that requires replacement of components which in turn requires testing and re- trimming should be carried out in a central workshop.

  • Page 17: Checking The Operation Of Powersaver

    2.3. Checking the Operation of PowerSaver The proper operation of the function requires a computer with VESA DPMS power management capabilities. Note that the power saving feature must be activated in the computer when checking the operation. State Colour of the power--on indicator Heater Video Normal Operation...

  • Page 18: Controlling The Memory For Picture Adjustments

    3. Controlling the Memory for Picture Adjustments The picture adjustment values are stored in non-volatile memory. The memory has separated areas for User Adjustments and for Factory Adjustments. 3.1. Memory for User Adjustments 3.1.1. Adjustment If there are values available in the memory for user adjustments, corresponding to the present timing signals, they are always used.

  • Page 19: Adjustment

    4. Service Mode Service Mode is needed for updating of the factory adjustments for display mode listed in the chap- ter Preset Display Modes. If there is no location in factory adjustment memory for display mode cur- rently in use, the adjustment affects the memory for user adjustments. 4.1.

  • Page 20: Service Menu

    4.2. Service Menu 4.2.1. Access to Service Mode Activate 9300K color temperature before you go to the service menu. Activate the service mode always in 107.10 kHz/85 Hz (NCE791). First switch OFF the monitor with power switch. 1) Push button down. 2) While keeping button down, switch ON the monitor.

  • Page 21: Memory Settings And Initializing The Replacement Ic (Ic402 On Sma)

    GEOMETRY . . . GEOMETRY . . . GEOMETRY . . . GREY SCALE . . . GREY SCALE . . . GREY SCALE . . . SHARPNESS SHARPNESS SHARPNESS PRODUCT INFORMATION . . . PRODUCT INFORMATION . . . PRODUCT INFORMATION .

  • Page 22: Workshop Maintenance

    5. Workshop Maintenance 5.1. Important Safety Notice The components, which are important for safety, are marked with special mark ! on the circuit dia- gram. It is essential that these critical parts should be replaced with manufacture’s specified parts to prevent X--radiation, shock, fire or other hazards.

  • Page 23: Disassembly

    5.5. Disassembly 5.5.1. Cabinet Set the monitor on cushion picture tube facing down 1. Loosen and remove two screws. 2. Open the plastic pawls with a screwdriver or special tool (for instance 860006) Screw Push open Do not twist on both sides 445N...

  • Page 24: Image Performance

    6. Image performance Measurement to verify this specification shall be made with equipment that measures the displayed image as if it were projected forward onto a flat plane tangent to the center of the CRT faceplate sur- face and perpendicular to the Z---axis of the CRT. Image performance specifications are applicable over specified input power conditions, specified environmental operating conditions and after being subjected to the specified non---operating en- vironmental conditions.

  • Page 25: White Uniformity

    6.3 White Uniformity Measurement conditions: --- Full screen picture size, Brightness in middle 100 nit --- Magnetic field horizontal Gauss vertical 0.45 Gauss --- Warming up time 1 hour Maximum variation between colour coordinates between any measurement points shall not vary more than d(x),d(y) below.

  • Page 26: Image Size

    6.6 Image size Display size is defined as the width and height of the display using the active raster, not including the border. Measurement: Full white field brightness set to 100 nits (29.2 Ft ---L). Cross---hatch test pattern. The width and the height are measured at the center of the screen. Requirements: Nominal size: Width = 393 ±...

  • Page 27: Jitter

    6.10 Jitter Image motion in terms of dynamic pixel displacement shall be defined as jitter. (MPR 1990:10, 1.07) The horizontal and vertical displacement of any pixel using the ”convergence” dot and cross hatch pattern measured using microscope with appropriate magnification. The maximum displacements in both the horizontal and vertical directions must be less than 0.1 6.11 Chromaticity Factors affecting chromaticity include colour set up, temperature and tracking, colour purity and...

  • Page 28: High Voltage Regulation

    6.14 High voltage regulation With a full load white field, at nominal input power supply voltage, brightness at minimum, from the minimum to maximum contrast settings, the size shall not change more than 0,5 % . 6.15 Blinking image Image motion shall be defined as the displacement of the active display when changed from a no load pattern to a full load pattern at a 1.0 Hertz rate.

  • Page 29: Adjustment Procedure

    7. Adjustment Procedure The following procedure must be carried out in case of large service operations e.g. when a circuit board or nonvolatile memory ICA has been replaced by a new one. The order of adjustments explained here has been found to produce the desired result with the mini- mum of effort.

  • Page 30: Preliminary Preparations

    7.2. Preliminary Preparations Connect the signal cable to the PC. Switch on the monitor and the PC. Let the monitor warm up for 20 minutes before starting the adjustments. 7.2.1. High Voltage Select 107.10 kHz/85Hz (NCE791) crosshatch test pattern. Connect the high voltage meter to the anode of the picture tube. Adjust the high voltage to 27.0 ±0.2 kV with RT301 on SMA--board.

  • Page 31: Geometry

    7.3. Geometry Magnetic fields for following adjustments: vertical 0.45G and horizontal 0.0G. Activate Service Mode in 107.10 kHz/85.0Hz (NCE791). Degaussing must be carried out before the picture adjustments. Degaussing shall be repeated if the monitor is moved. 1) Select 107.10/85.0 (NCE791) crosshatch test pattern. to maximum and adjust until the background is faintly visible.

  • Page 32: Grey Scale

    7.4. Grey Scale The grey scale is adjusted for 9300K colour temperature. Activate Service Mode in 107.10 kHz/85Hz (NCE791). 7.4.1. The Most Dominant Colour The most dominant colour has been marked in a label on the deflection yoke. It may not be correct if tube or SMH card has been changed. In that case judge the most dominant colour from the tone of the picture after you have made the following adjustments.

  • Page 33: Convergence

    7.7. Convergence Reduce first the convergence error in the middle of the screen to minimum using static adjustments. After the convergence is faultless in the middle of the tube, use dynamic adjustments to eliminate the error in the edges of the tube. Static adjustments affects the whole picture area: Magnet ring set on the tube neck (horizontal + vertical) Dynamic adjustments affects a part of the picture area:...

  • Page 34: Dynamic Convergence

    7.7.4. Dynamic Convergence Deflection yoke trimmers Do not adjust ! A--- area B--- area Do not adjust ! 445N...

  • Page 35: Installing Serial Number To Processor

    7.8. Installing serial number to processor Parallel cable Power cable Signal cable of monitor You will find serial number on rating label behind of back cover. Use NDP repair software version 8.201 or newer to create the serial number. 7.9. Magnet rings Do not move purity magnet rings.

  • Page 36: Screen And Faceplate Blemishes

    8. Screen and Faceplate Blemishes 8.1. Definitions of inspection conditions and terms 8.1.1. Standard observing condition Distance: 30 cm from screen face. Angle 45 from Z axis. Cosmetic inspection without raster should be done under luminance: 500lx MIN. 8.1.2. Zone division 302.2 mm other screen area 8.1.3.

  • Page 37: Glass Blemish

    8.3. Glass blemish 8.3.1. Scratch Width Length of single scratch W< 0.05 No limit 0.05<W<0.10 0.10<W<0.15 W> 0.15 None allowed 8.3.2. Bubbles/Foreign materials Bubbles Average diameter of defects Quantity allowed within any Minimum distance circle 0.3---0.45 12.7 Air blister (Max. legth 6.0) 12.7 (Max.
  • Page 38 445N...
  • Page 39 445N...

  • Page 40: Block Diagram

    Block diagram 445N...
  • Page 41 NOTE! DEMA Safety components marked with R137 R138 Q104 Q102 must be replaced with original or approved components only. PTC102 PTC101 All printed boards and the back cover are also safety components. D115 UC7112 RE101 LL4148 QH0074 C102 NTC101 D101 T111 D116 M101...
  • Page 42 ELECTROLYTIC SMD 1W 3W etc. POLYCARBONATE 0.25W 0.25W NF POLYESTHER POLYPROPYLENE 0.5W NF 0.5W R204 UVLO D201 CERAMIC LL4148 T202 BC847B R214 100R C201 M201 R201 R203 D207 FJ1837 1N4148 IC201 C204 D233 D228 L207 UC3843A RASTER 100n BYV27-200 1N5818 D206 FJ0505 C202...
  • Page 43 D308 C317 R319 R318 LL4148 8k25 OVER_VOLT R320 C316 24k9 R317 R327 220R 220R M301 R302 FM0646/FM0643 46k4 C302 HIGH VOLT R321 100R RT301 ADJ. R316 L301 n.c. R303 100k C318 C301 R301 100p C314 SG301 ST. FOCUS 220R R315 200V C313 T301...
  • Page 44 TO SMK001 TO VIDEO Q403 Q402 Q401 POWER1 KEYPAD POWER2 T402 H_LOCK BCR191 Q404 R489 R404 KEYPAD R403 470k R401 R402 T403 BC847B R469 R455 R468 R454 C429 562R 100n C401 C428 R456 RESET R405 R453 IC405 C427 680R C402 470R TDA9111 H/HVIN...
  • Page 45 SMA251H SB5249 01.00 Page 11 445N...
  • Page 46 SMA251H SB5249 01.00 Page 12 445N...
  • Page 47 Part Item Number Description SMA251 MAIN BOARD 445N AA0715 CF RES 0W25 56K J 2.5- -7 AG3365 MF RES 0W5 464R F TC50 2.5 foil AJ2463 MO RES 2W0 5R6 J 6- -17 RA244 AJ2523 MO RES 2W0 10R J 6- -17 RA221 RA222 AJ2763 MO RES 2W0 100R J 6- -17...
  • Page 48 Part Description Item Number JL0069 OPTOCOUPLER VRMS 5KV IC102 IC103 IC106 JM0334 TR BD135 NPN 45V 1A5 250MHZ TO T219 JM0341 TR BUH1215(435B) N 1500V 19ATO T206 JS0019 FET IRF640 N 200V 18A TO22 T207 JS0078 FET STP7NB60FP N 600V 3.5A 1R2 T201 JS0051 FET IRF9540 P 100V 19A 0.2R TO...
  • Page 49 Part Item Number Description AA0729 CF RES 0W25 220K J 2.5- -7 RA463 AA0731 CF RES 0W25 270K J 2.5- -7 RA229 AA0737 CF RES 0W25 470K J 2.5- -7 RA107 RA108 RA128 RA129 AA0741 4F RES 0W25 680K J 2.5- -7 RA249 AA0754 CF RES 0W25 2M2 J 2.5- -7...
  • Page 50 Part Description Item Number AC4509 CHIPRES 0W1 33K 5% 0805 20 RA139 RA144 RA482 AC4513 CHIPRES 0W1 47K 5% 0805 20 RA404 RA445 AC4511 CHIPRES 0W1 39K 5% 0805 20 RA328 AC4519 CHIPRES 0W1 82K 5% 0805 20 RA251 AC4521 CHIPRES 0W1 100K 5% 0805 2 RA431 AC4529...
  • Page 51 Part Item Number Description CK2880 PESCAP 4U7 K 50V Y5 081308 CA255 CA215 CC3360 CHIPCERCAP X7R 22N 10% 50V 0 CA201 CN0130 ELCAP 0U47 M 250V RM5 : C212 CN2017 ELCAP 1U0 M 50V RM5: 105’ 6 CA113 CA147 CA151 CA426 CN2032 ELCAP 10U M 50V RM5: 105’...
  • Page 52 Part Description Item Number SMA251H SB5249 01.00 Page 6 445N...
  • Page 53 IC2-1 100n LM358D BAV99 TDA8447 R70 2k2 154R DAC8 154R 100R 100R TR DUAL P/N TR DUAL P/N TR DUAL P/N TR DUAL P/N DAC7 R72 2k2 BCX51 BCX51 DAC6 100R DAC5 R74 2k2 TOP-BOTTOM DAC4 BAV99 -12V V_RAMP DAC3 R76 2k2 100n BCX54...
  • Page 54 SMK001D 445N SB5244 06.99 Page 2...
  • Page 55 Part Description PG Item Number SMK001 BLC BOARD 445N AQ2435 TPMET. V10 2K2 RM 5X2.5 03 RTK1 RTK2 LM0968 IC TDA8447 12C BUS 8BIT DAC DI 12 ICK1 QK1463 ROW CONN ’JST’ 1X02 2.5 VERT 02 QK3 QK4 QK5 QK6 QK1703 PICOFLEX HEADER 1X08 1.27MM 03 QK1...
  • Page 56 1000u R309 100n R448 100R FJ0505 C309 R470 R470 M52743BSP M52743BSP n.c. 100V BFQ131 R304 R304 OSD BLK IN OSD BLK IN VCC2 R308 IN(B) OUT(B) 100n C310 R330 R310 R440 R440 VCC1(B) VCC1(B) N.C. R317 R447 1k00 R316 R315 C306 C306 C307...
  • Page 57 SMY055E 445N SB5252 01.00 Page 3...
  • Page 58 05 CY16 CY56 FJ0448 CHOKE 13UH FERRITE 2X15 02 LY7 LM1012 IC CR6929A/2 3- -CH CRT DRIVER 25 ICY3 LM1021 IC STV9432/N OSD NOKIA CHAR. 14 ICY5 LM1027 IC M52743BSP 3- -CH PREAMPL.SDIP 15 ICY2 QA0095 CRYSTAL 8.00 MHZ HC- -49...
  • Page 59 Part Description Item Number AG3565 MF RES 0W5 46K4 F TC50 2.5 01 RY122 RY222 RY322 CB3133 CHIPCERCAP NP0 22P 50V J 0 01 CY61 CY62 CY67 CY68 CB3137 CHIPCERCAP NP0 33P 50V J 0 01 CY105 CY205 CY305 CB3141 CHIPCERCAP NP0 47P 50V J 0 01 CY208 CB3175...
  • Page 60 QG0326 POWER 445N QG0327 LED1 JL0059 MENU QG0327 QG0327 SMZ096B SB5261 01.00 Page 2...
  • Page 61 Part Description PG Item Number SMZ096 KEY BOARD 445N JL0059 LED GREEN TLHG6205 02 LEDZ1 QG0327 PUSH- -BUTTON SWITCH 12V 50MA 03 SWZ2,SWZ3,SWZ4 QG0326 PUSH- -BUTTON SWITCH 30VDC/0.1A 10 SWZ1 QM1074 PICOFLEX ASSY BI- -IDT 6- -POS 300 09 QZ1 QM1058 PICOFLEX ASSY BI- -IDC 4- -POS 400 06 QZ2...
  • Page 62 Spare Parts Production Description 445PRO 445N051 21” Nokia 445PRO, 125 Khz (EU) 445PRO 445N059 21” Nokia 445PRO, 125 Khz (US) 445N055 21” Quatographic, 121Khz Spare Parts 445N...
  • Page 63 Demaign coil FD0217 Purity coil FD1000 Purity coil FD0103 Picture tube NM1057 Grounding wire SE2781 Grounding wire SE2612 Grounding wire UC3016 Demagn. coil holder UG1022 Picture tube screw WC0543 Washer WJ0171 Friction plate UL0090 Badge NOKIA UA1243 051,059 Spare Parts 445N...
  • Page 64 Item no Description Code Frame assmebly UC7137 Grounding spring UC6973 Insulator UG1064 Beam---landing PCB SMK001 Slide bar UG1076 Main board SMA251 Brace UC7135 Cooling plate, right UC7140 Cooling plate, left UC7139 Support frame UG1050 Connector panel assembly UC7141 Cover video UC7142 Video PCB SMY055...
  • Page 65 ZZ2889 Type label ZZ2902 Pt screw K40x20 WN 1447 WC0354 Stand assembly US0137 Stand plate US0137 Foot pad UL0702 Packing materials (Nokia): Packing box ZA2580 Side top cushion ZA6029 Side bottom cushion ZA6028 LDPE---Plasticbag ZA0478 Packing materials (Quatographic): Packing box...
  • Page 66 * = Not normally supplied as spare part Spare Parts 445N...
  • Page 67 Spare Parts 445N...