Color monitor with plug & play 19" (18" viewable diagonal) (18 pages)
Summary of Contents for Nokia 446PRO
Nokia Display Products Oy Chassis 446F P .O.Box 14 FIN---24101 Salo, Finland 19” High Resolution Colour Monitor 446PRO Contents Service Monitor Dismantling Part List PCB Part List PCB Layout pictures Level Main Board module ..
1. Product Overview 446F is a 19 inch monitor. The maximum resolution of 1600 x 1200 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.
1.2. Certifications The monitor has following agency approvals 1.2.1. Safety FIMKO, DEMKO NEMKO, SEMKO UL / USA CSA / Canada TÜV ---GS / Germany IAA / Korea PSB / Singapore CCIB / China 1.2.2. EMC FCC---D.O.C. VCCI / Japan CE / Europe RRL EMI / Korea BSMI / Taiwan 1.2.3.
1.3. Preset Display Modes Right Border Left Border Full 0.7 V intensity Video Blanking H Blanking H Active Video H Back porch H Front Porch H Sync H Sync. Signal Bottom Border Upper Border Full 0.7 V intensity Video Blanking V Blanking V Active Video V Back Porch...
Right Border Left Border Full 0.7 V intensity Video Blanking H Blanking H Active Video H Back porch H Front Porch H Sync H Sync. Signal Bottom Border Upper Border Full 0.7 V intensity Video Blanking V Blanking V Active Video V Back Porch V Front Porch V Sync...
1.5. Monitor Connection Make sure that the monitor is disconnected from mains and the power switches of the computer 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.
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.
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 button. Select the header with ---/+ buttons. Push to confirm the selection. Adjustment and settings corresponding the header appear below the header field. Select the adjustment with ---/+ buttons.
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.
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...
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.
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.
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 91.376 kHz/85 Hz (GTF642). First switch OFF the monitor with power switch. 1) Push button down. 2) While keeping button down, switch ON the monitor.
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.
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 on both sides Do not twist 446F...
6. Image performance Measurement to verify this specification shall be made with equipment that measures the dis- played image as if it were projected forward onto a flat plane tangent to the center of the CRT faceplate surface and perpendicular to the Z---axis of the CRT. Image performance specifications are applicable over specified input power conditions, speci- fied environmental operating conditions and after being subjected to the specified non---operat- ing environmental conditions.
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.
--- Luminance uniformity: With the brightness control set so that the background raster is just extinguished the contrast control set for L0 = 100 nits, ( 29 Ft ---L), luminance on areas L1, L2, L3 and L4 shall be greater than (75 %) of L0.(75 nits) 6.6.
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.
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 91.376 kHz/85 Hz (GTF642) crosshatch test pattern. Connect the high voltage meter to the anode of the picture tube.
7.3. Geometry Magnetic fields for following adjustments: vertical 0.45G and horizontal 0.0G. Activate Service Mode in 91.376 kHz/85 Hz (GTF642). Degaussing must be carried out before the picture adjustments. Degaussing shall be repeated if the monitor is moved. 1) Select 91.376 kHz/85 Hz (GTF642) crosshatch test pattern. to maximum and adjust until the background is faintly visible.
7.4. Grey Scale The grey scale is adjusted for 9300K colour temperature. Activate Service Mode in 91.376 kHz/85 Hz (GTF642). 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.
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:...
7.7.5. Allowed Error Levels for Convergence Area A ≤ 0.25 mm Area B ≤ 0.35 mm 7.8. Colour Purity Do not move purity magnet rings. If the purity magnet rings are found to have moved during trans- portation or handling, set them just in the original position by tracing the locking paint put on purity magnet rings and holder of beam bender and then readjust the static convergence.
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. Color and brightness 8.1.2.
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 0.15<W None allowed 8.3.2. Bubbles/Foreign materials Bubbles Average diameter of defects Quantity allowed Minimum distance Within any 70 mm circle 0.3---0.45 12.7 Air blister (Max. legth 6.0) 12.7 (Max.
Item no Description Code Frame assmebly UC7130 Grounding spring UC7048 Insulator UG1064 Slide bar UG1076 Main board SMA241 Brace UC7135 Cooling plate, right UC7133 Cooling plate, left UC7132 Support frame UG1050 Connector panel assembly UC7134 Cover video UC7136 Video PCB SMY052 Base module SMH160...
Item no Description Code Back cover UD0670 Type label ZZ2883 Pt screw K40x20 WN 1447 WC0354 Stand assembly US0137 Spare Parts 446F...
Packing materials: Packing box ZA2597 Side top cushion ZA5025 Side bottom cushion ZA5024 LDPE---Plasticbag ZA0478 Accessories: Power cord QM0028 Power cord QM0049 Signal cable QM0308 Plastic bag ZA0502 User guide ZK0026 Installation guide ZF5834 Mac adapter QK1518 Warranty card ZF5812 * = Not normally supplied as spare part Spare Parts 446F...
Part Description Item Number AG3505 MF RES 0W5 11K0 F TC50 2.5 RA127 AG3519 MF RES 0W5 15K4 F TC50 2.5 RA408 AG3539 MF RES 0W5 24K9 F TC50 2.5 RA316 AG3551 MF RES 0W5 33K2 F TC50 2.5 RA340 RA446 RA474 AG3565 MF RES 0W5 46K4 F TC50 2.5 RA106 RA301...
Part Item Number Description LA105 LA106 LA301 LA406 FJ0725 BEAD INDUCTOR MIN IMP360HM FRA401 FRA402 JF0025 DI 1N4148 75V 200MA DA123 DA204 DA206 DA208 DA210 DA442 DA403 DA412 DA401 DA402 DA444 JF0060 DI 1N4002 100V DA125 DA308 JF0072 DI BAV21 200V 250MA 50N DA420 DA421 JF0073 DI RGP10G 400V...
Part Description Item Number SMA241H SB5218 02.00 Page 6 446F...
QG0326 POWER QG0327 LL4148 LL4148 QG0327 MENU QG0327 BC857B LED1 JL0044 470R SMZ092C 446F SB5239 08.99 Page 3...
DEMA NOTE! Q102 Safety components marked with R102 R103 must be replaced with original or approved components only. All printed boards and the back cover are also safety components. C107 D102 RE101 LL4148 400VAC QH0074 C108 PTC101 PTC102 C110 D101 GBU4K C101 C102...