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Service
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. Troubleshooting 2.3. Checking the Operation of Power Saver 3. Controlling the Memory for Picture Adjustments 3.1. Memory for User Adjustments 3.1.1. Adjustment 3.1.2. Resetting the User Memory 3.2. Memory for Factory Adjustments 3.2.1. Adjustment 4. Service Mode 4.1. Grouping of the Adjustments 4.2. Service Menu 4.2.1. Access to the Service Mode 4.2.2. Geometry 4.2.3. Grey Scale 4.2.4. Memory settings and Initializing the Replacement IC (IC204 on SMA) 4.2.5. Storing Adjustments 4.2.6. Exit from Service Menu 5. Workshop Maintenance 5.1. Important Safety Notice 5.2. ESD--Sensitive Parts 5.3. Test Equipment 5.4. Test Patterns 5.5. Disassembly 6. Image performance 6.1. Image stabilising time 6.2. Colour temperature and tracking 6.3. White uniformity 6.4. Colour purity 6.5. Luminance 6.6. Image size 6.7. Linearity 6.8. Geometrical distortion 6.9. Jitter 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. Convergence Measuring Gauge 446F 1
7.7.3. Static Convergence 7.7.4. Dynamic Convergence 7.7.5. Allowed Error Levels for Convergence 7.8. Colour Purity 8. Screen and Faceplate Blemishes 8.1. Definitions of inspection conditions and terms 8.1.1. Standard observing condition 8.1.2. Zone division 8.1.3. Minimum distance beetween defects 8.1.4. Average diameter of defect 8.2. Face defect standard (black spot, stain) 8.3. Glass blemish 8.3.1. Scratch 8.3.2. Bubbles/foreign materials
Revision History
Rev 09.99 02.00 Date 24.09.99 14.02.00 J. Paukku SMA241H added Prepared by Comments
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446F
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.
1.1. Technical Specifications
Cathode Ray Tube . . . . . . . . . . 19" in diagonal 86° deflection angle Antistatic, antireflex Phosohor P22 medium short, Dot pitch 0.24 mm Picture Size . . . . . . . . . . . . . . . . 354 mm x 265 mm with specified geometric distortion Maximum Picture Size . . . . . . . 366 mm x 275 mm Power Input Requirements . . . Voltage 90--264 V, 50/60 Hz Current 1.8 A/100 V, 0.8 A/240 V Power Dissipation . . . . . . . . . . . < 130 W Normal Operation < 95 W Stand--by < 8 W Suspend < 3 W Power off Memory Locations . . . . . . . . . . . 3 for factory preset display mode 18 for user adjusted display mode Geometric Distortion . . . . . . . . . The distance between bezel and active screen edge shall not vary more than 2 mm in both vertical and horizontal dimensions Luminance . . . . . . . . . . . . . . . . . Min. 100 cd/m2 (Nits) at center, with full white field Video Input . . . . . . . . . . . . . . . . . Input Signal: RGB, analog, max 0.7 V/ 75 Horizontal addressability: 1600 dots maximum Vertical addressability: 1200 dots maximum Synchronization Range . . . . . . Horizontal: 30 kHz to 107 kHz automatic Vertical: 50 Hz to 150 Hz automatic Synchronization Signal . . . . . . . Separate TTL , positive/negative Composite TTL , positive/negative Max. Dot Frequency . . . . . . . . . 230 MHz Temperature . . . . . . . . . . . . . . . . Operating: +10°C to +35°C Packed: --30°C to +60°C Humidity . . . . . . . . . . . . . . . . . . . Operating: 20% to 80 % Packed: 5% to 90 % Weight . . . . . . . . . . . . . . . . . . . . . 25.3 kg net 29.6 kg gross Size, Tilt and Swivel
D W
20 90 H 5 90
Dimensions Monitor . . . . . . . . . . . . . . . . . . . . H W D Package . . . . . . . . . . . . . . . . . . . H W D
........ ........ ........ ........ ........ ........
471 mm 470 mm 464 mm 596 mm 600 mm 571 mm
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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. X ---ray, emissions, environmental, ergonomics
TÜV ---ERGO / Germany DHHS / USA TCO 99 / Sweden Blue Angel / Germany
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1.3. Preset Display Modes
Full intensity 0.7 V
Right Border
Left Border
Video
Blanking 0V
H Blanking H Front Porch
H Active Video H Back porch
H Sync. Signal
H Sync
Full intensity
Bottom Border
0.7 V
Upper Border
Video
Blanking 0V
V Blanking V Front Porch
V Active Video V Back Porch
V Sync. Signal
V Sync
Display Mode no NCE V Frequency/Hz H Frequency/kHz H Period/us Active Video/us H Resolution H Sync/us H Back Porch/us V Period/lines V Resolution V Sync/lines V Back Porch/lines H Sync Polarity V Sync Polarity H Front Porch/us V Front Porch/lines Dot Frequency/MHz Interlacing
00 GTF642 85.0 91.376 10.944 8.032 1200 0.803 1.456 1075 1024 3 47 --+ 0.65 1 159.360 no
01 NCE642 85.0 91.146 10.971 8.127 1280 1.016 1.422 1072 1024 3 44 + + 0.41 1 157.500 no
02 NCE791 85.0 106.25 9.41 6.97 1600 0.83 1.32 1250 1200 3 46 + + 0.27 1 229.490 no
03 NCE513 85.0 68.677 14.561 10.836 1024 1.02 2.20 808 768 3 36 + + 0.51 1 94.500 no
04 NCE501 60.0 48.363 20.677 15.754 1024 2.092 2.6462 806 768 6 29 ----0.37 3 65.000 no
05 NCE506 75.0 60.023 16.660 13.003 1024 1.219 2.235 800 768 3 28 + + 0.20 1 78.750 no
06 NCE401 60.3 37.879 26.400 20.000 800 3.200 2.200 628 600 4 23 + + 1.00 1 40.000 no
07 NCE406 75.0 46.875 21.333 16.162 800 1.616 3.232 625 600 3 21 + + 0.32 1 49.500 no
08 NCE40A 85.06 53.674 18.631 14.222 800 1.14 2.70 631 600 3 27 + + 0.57 1 56.250 no
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Full intensity
0.7 V
Right Border
Left Border
Video
Blanking 0V
H Blanking H Front Porch
H Active Video H Back porch
H Sync. Signal
H Sync
Full intensity
Bottom Border
0.7 V
Upper Border
Video
Blanking 0V
V Blanking V Front Porch
V Active Video V Back Porch
V Sync. Signal
V Sync
Display Mode no NCE V Frequency/Hz H Frequency/kHz H Period/us Active Video/us H Resolution H Sync/us H Back Porch/us V Period/lines V Resolution V Sync/lines V Back Porch/lines H Sync Polarity V Sync Polarity H Front Porch/us V Front Porch/lines Dot Frequency/MHz Interlacing
09 NCE300 59.9 31.472 31.774 25.420 640 3.81 1.91 525 480 2 33 ----0.64 10 25.177 no
10 NCE306 75.0 37.500 26.667 20.317 640 2.032 3.810 500 480 3 16 ----0.51 1 31.500 no
11 NCE30A 85.0 43.269 23.111 17.778 640 1.56 2.22 509 480 3 25 ----1.56 1 36.000 no
12 NCE200D 70.1 31.467 31.780 25.423 1440 3.814 1.907 449 400 2 34 --+ 0.64 13 56.640 no
13 NCE012 75.0 67.500 14.815 10.667 1152 1.185 2.370 900 864 3 32 + + 0.59 1 108.000 no
14 NCE011 75.1 68.681 14.560 11.520 1152 1.280 1.440 915 870 3 39 ----0.32 3 100.000 no
15 NCE603 60.0 63.981 15.630 11.852 1280 1.037 2.296 1066 1024 3 38 + + 0.44 1 108.000 no
16 NCE605 75.0 79.976 12.504 9.481 1286 1.06 1.84 1066 1024 3 38 + + 0.12 1 135.640 no
17 NCE700 60.0 74.995 13.334 9.877 1600 1.185 1.883 1250 1200 3 46 + + 0.39 1 161.990 no
18 NCE70X 75.0 93.755 10.666 7.901 1600 0.948 1.501 1250 1200 3 46 + + 0.32 1 202.510 no
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1.4. S-Capacitor table
f/kHz 27.6 x 28.4 x 29.2 x 30.4 x 30.8 x 31.8 x 32.8 x 33.7 x 34.7 x 36.0 x 37.2 x 38.3 x 39.4 x 40.4 x 41.4 x 42.7 x 44.2 x 45.8 x 47.7 x 49.4 x 51.6 x 53.5 x 54.6 x 55.8 x 57.3 x 59.0 x 60.5 x 62.2 x 65.3 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x S5 S4 S3 S2 S1 S0
446F
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65.3 x 68.8 x 71.3 x 74.1 x 78.2 x 82.8 x 87.4 x 94.0 x 100.0 108.0 x x x x x x
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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. Connect the power cord first to the monitor and then to a grounded power outlet.
If your computer is DDC compatible (PC)
--Do not use any adapter when connecting signal cable to your computer. Do not extend the signal cable with extension lead. The DDC signals will not accept extended cable. --- Display controller must be compatible for External +5 V
Signal connector
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 -> -> ->
-> <<-> -> <-
1
5
6 11
10 15
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1.6. User Controls
4
3
21
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. Blinking Green: The monitor is in Automatic Power off state. Not illuminated: The monitor is turned off with power switch or disconnected from mains outlet.
The power switch does not disconnect the monitor from mains. In oder to make the monitor completely powerless, unplug the power cord from power outlet.
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1.7.Menu
1.7.1. Moving in the menu
Menu operations are controlled with button and ---/+ buttons. a Call the menu to the screen by pushing button. b Select the header with ---/+ buttons. c Push to confirm the selection. Adjustment and settings corresponding the header appear below the header field. d Select the adjustment with ---/+ buttons. e Push to confirm the selection. Menu disappears and a scale shows the position of the adjsutment. In addition to the bar, position of the adjustment is shown as a percenage of the maximum value. The upper number shows the current value and the lower one shows the value where the adjustent started. f Adjust with ---/+ buttons. g When ready, push button.
1.7.2. Exit Menu
Select EXIT MENU and pushing button.or push + and --- buttons together
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--- +
a
HORIZONTAL CENTERING PREVIOUS VALUE: ADJUST: --- /+ 53% 50% OK: 44% 50% OK: 45% 50% OK: 30% 40% OK:
b
NAVI
WIDTH NOKIA 446PRO SIZE & POSITION SHAPE... SHARPNESS COLOR... MISCELLANEOUS EXIT MENU AUTO SHAPE HORIZONTAL CENTERING WIDTH VERTICAL CENTERING HEIGHT MOVE --- / + NOKIA 446RO SIZE & POSITION SHAPE SHARPNESS COLOR... MISCELLANEOUS EXIT MENU DEFAULT SHAPE TILT ORTHOGONALITY TRAPEZOID PINCUSHION PINCUSHION BALANCE MOVE --- / + 75Hz PREVIOUS VALUE: ADJUST: --- /+ VERTICAL CENTERING PREVIOUS VALUE: ADJUST: --- /+ HEIGHT PREVIOUS VALUE: SELECT: 75Hz ADJUST: --- /+
c
f e
TILT PREVIOUS VALUE: ADJUST: --- /+ 30% 40% OK:
d
NAVI
g
ORTHOGONALITY SELECT: PREVIOUS VALUE: ADJUST: --- /+ TRAPEDOIZ PREVIOUS VALUE: ADJUST: --- /+ PINCUSHION PREVIOUS VALUE: ADJUST: --- /+ PINCUSHION BALANCE PREVIOUS VALUE: ADJUST: --- /+ MOIRE PREVIOUS VALUE: ADJUST: --- /+ 30% 40% OK: 30% 40% OK: 30% 40% OK: 30% 40% OK: 30% 40% OK:
NOKIA 446RO 75Hz SIZE & POSITION SHAPE SHARPNESS COLOR... MISCELLANEOUS EXIT MENU DEFAULSHARPNESS VERTICAL CONVERGENCE HORIZONTAL CONVERGENCE MOIRE MOVE --- / + SELECT: NOKIA 446PRO SIZE & POSITION SHAPE SHARPNESS COLOR... MISCELLANEOUS EXIT MENU CONTRAST BRIGHTNESS DEFAULT COLOR COLOR PRESETS RED GREEN BLUE SAVE CURRENT COLOR MOVE --- / + NOKIA 446PRO SIZE & POSITION SHAPE... COLOR... MISCELLANEOUS EXIT MENU MONITOR DEFAULTS DEMAGNETIZE ABOUT MONITOR MENU OPTIONS MOVE --- / + 75Hz
9300 K
SELECT: 75Hz 6500K, 7000K, 8000K, 9300K, 10000K, 1, 2 MENU OPTIONS LANGUAGE/SPRACHE/LANGUE HORIZONTAL POSITION VERTICAL POSITION DISAPPEARANCE TIME 1:00 BACK ADJUST: --- /+ LANGUAGE/SPRACHE/LANGUE ENGLISH DEUTSCH SVENSKA SUOMI ITALIANO FRANCAIS ESPANOL CANCEL ADJUST: --- /+ OK:
SELECT:
OK:
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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 maintenance and repair that requires replacement of components which in turn requires testing and retrimming should be carried out in a central workshop.
Symptom Picture screen is blank The indicator on the front panel is not illuminated The indicator on the front th f t panel is illuminated Measures Check that the power cord is correctly connected to the monitor and to the power outlet. If the monitor is powered through the computer, check that the computer is switched on with the mains switch. Use a desk light, for example, to verify that current is connected to a power outlet. If no electricity is connected to the outlet, call an electrician. Unplug the monitor from power outlet for about one minute. Check that the signal cable connector is connected. If the connector is loose tighten the connector's screws. The Monitor might be in stand--by position. Push one of the buttons or move the mouse. Unplug the monitor from outlet for about one minute minute. Switch off the monitor and the computer. Remove the signal cable from the computer. Switch on the monitor using the power switch. If the Selftest error menu appears on the screen, it is evident that the monitor functions correctly and the problem is caused by an error in other parts of the system. Check the signal cable's connection pins. If the pins are slightly distorted, use nose pliers to straighten them. The computer may use a timing values which are nization range. Picture has colour defects f t Demagnetize the monitor. If colour defect is repeated without the monitor having been moved, it is possible that the monitor is influenced by a strong magnetic interference field (near to a high power cable, for example). Try to find a better location for the monitor or the interference source. Note that another monitor placed too near (less than 30 cm.) may also generate interference in the picture. Switch off the monitor and the computer. Remove the signal cable from the computer. Switch on the monitor using the power switch.Check the colour of the Red, Green and Blue bars. If they have pure colours, the fault is not in the monitor. Check signal cable connectors and the computer. If the menu itself and the colour bars are discoloured, the monitor is obviously damaged. Your computer may use a timing for which the corresponding picture characteris-tic adjustments have not been set at the factory. Adjust the picture characteristics Check the proximity of other electrical devices that generate magnetic fields, such as speakers, ot e monitors, e ect c fans a d fluorescent light fixtures. suc spea e s, other o to s, electric a s and uo esce t g t tu es Make sure your computer and video card are properly configured for your monitor. out of the monitor's synchro-
Picture has strong colour defect,
Picture is stable but distorted Picture is unstable
The automatical appearance of the Error menu on the screen means that the signal is faulty or missing.
ERROR Red Green Blue Signal: No signal Cable not connected ERROR Red Green Blue Signal: No signal Cable connected OK
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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 Normal Operation Stand--by Suspend Power Off Colour of the power--on indicator Green Green Red Red 5V Yes Yes Yes Yes Heater Yes Yes Yes No 12V Yes Yes No No Video Yes No No No
DPMS (Display Power Management Signaling) is a trade mark of Video Electronics Standard Association (VESA)
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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
1 2 3 If there are values available in the memory for user adjustments, corresponding to the present timing signals, they are always used. New user made adjustments are stored to the memory for user adjustments.
3.1.2. Resetting the User made settings for geometry or image
User memory can be emptied from user made settings. Resetting affects only the timing which is currently active. The reset function is inhibited if no corresponding factory preset display mode exists. After resetting all picture properties are coming from memory for factory adjustments.
3.2. Memory for Factory Adjustments
3.2.1. Adjustment
4 -Factory adjustments can be updated with service menu in service mode. If there is no location in factory adjustment memory for display mode currently in use, the adjustment affects the memory for user adjustments. If the memory location mentioned in case 1 is empty, the picture adjustment values are read from memory for factory adjustments. Factory adjustments, corresponding to the current display mode, are transferred to user memory if any picture property is adjusted. After that the operation is as in case 1.
The memory can be updated with Service menu in Service Mode Refer to the chapter "Service Mode" The memory can be updated with User Menu in User Mode
3
Storing Initialization Memory for Factory Adjustments SMA IC204 Preset Recall
2
Memory for User Adjustments SMA IC204
Basic Adjustments
4
4
1
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4. Service Mode
Service Mode is needed for updating of the factory adjustments for display mode listed in the chapter Preset Display Modes. If there is no location in factory adjustment memory for display mode currently in use, the adjustment affects the memory for user adjustments.
4.1. Grouping of the adjustments
There are three groups of software adjustments in service mode: -- Geometry set -- Grey scale adjustment set The following table shows how the adjustments act in relation to the display modes.
Adjustment
Common for all Display modes
Separate for each Display mode X X X X X X X X
Available in User Mode X X X X X X X X
Available in Service Mode X X X X X X X X X X X
Horizontal centering Vertical centering Height Width Pincushion Pincushion balance Trapezoid Orthogonality S-correction C-correction E/W corner Tilt Moire Raster G2 Min contrast Max contrast R Black level G Black level B Black level R Ampl G Ampl B Ampl BCL adjust Vertical conv Horizontal conv Init burn in test * X X X X X X X X X X X X X X X X X X
X X
X X X X X X X X X
X X X X X
X X X X X X X
Common adjustments need to be adjusted only once. Separate adjustment must be performed for every display mode to be stored * Init burn in test only for manufacturing purposes
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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. button down, switch ON the monitor. 2) While keeping button when the power-- on indicator is illuminated. 3) Release button. 4) Press 5) Monitor ask password. Type the password (7711) with the ---/+ buttons. button. 6) Press Select the items in the Menu with the --- or + buttons. Push the button to open Geometry, Grey Scale, Product Information or Memory Settings. Adjust each property with the --- or + buttons.
4.2.2. Sharpness
Geometry submenu contains placement, size and shape adjustments.
GEOMETRY . . . GREY SCALE . . . SHARPNESS PRODUCT INFORMATION . . . MEMORY SETTINGS . . . RASTER WIDTH HORIZONTAL CENTERING HEIGHT VERTICAL CENTERING PINCUSHION PINCUSHION BALANCE TRAPEZOID ORTHOGONALITY S CORRECTION C CORRECTION E/W CORNER TILT EXIT 00: 1280x1024 85HZ
4.2.3. Grey Scale
This monitor has six preset tints. With tint numbers smaller than 3 the picture becomes reddish and with tint numbers greater than 3 the picture turns blue.
Tint no Colour Temperature 1 5000K 2 6000K 3 6500K 4 7000K 5 8000K 6 9300K 7 10000K
The grey scale adjustment affects directly tint number 6 (9300K) only. Other tints are derived automatically from 9300K colour temperature.
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GEOMETRY . . . GREY SCALE . . . SHARPNESS PRODUCT INFORMATION . . . MEMORY SETTINGS . . . CONTRAST MIN CONTRAST MAX CONTRAST BRIGHTNESS G2 RED BLACK LEVEL GREEN BLACK LEVEL BLUE BLACK LEVEL RED AMP . GREEN AMP . BLUE AMP . BCL ADJUST EXIT 00: 1280x1024 85HZ GEOMETRY . . . GREY SCALE . . . SHARPNESS PRODUCT INFORMATION . . . MEMORY SETTINGS . . . TYPE : O CUSTOM COLOR: 1 DDC : EXT (24LC21) INITIALIZE EEPROM INIT BURN IN TEST EXIT 00: 1280x1024 85HZ
GEOMETRY . . . GREY SCALE . . . SHARPNESS PRODUCT INFORMATION . . . MEMORY SETTINGS . . . VERTICAL CONV HORIZONTAL CONV MOIRE EXIT 00: 1280x1024 85HZ
GEOMETRY . . . GREY SCALE . . . SHARPNESS PRODUCT INFORMATION . . . MEMORY SETTINGS . . . MODEL: HP P1110 SERIAL NUMBER FI92500061 POWER ON HOURS 23 STAND--- BY HOURS 0 SUSPEND HOURS 0 ACTIVE--- OFF HOURS 0 FIRMWARE 0.19 EXIT 00: 1280x1024 85HZ
4.2.4. Memory settings and Initializing the Replacement IC204 on SMA board
If the memory for factory adjustments is replaced, it must be initialized. During initializing all memory locations are written with approximate values. They must be updated in service mode as explained in the chapter 'Adjustment Procedure'. - INTIALIZE EEPROM always with using display mode no 00! (91.376 kHz/85 Hz (GTF642)) - After initializing switch OFF the monitor. - Activate service mode as explained before. - Select Memory settings ---menu. - Select Monitor type O, custom color 1 and DDC (EXT (24LC21) Caution Initializing of a programmed memory IC deletes all user and factory made adjustments.
4.2.5. Storing the Adjustments
When the adjustment is ready, return to the menu by pushing the stored automatically. button. Adjustement will be
4.2.6. Exit from Service Mode
Switch off the monitor.
4.2.7. Uninstalled EEPROM
If you have uninstalled EEPROM. You can not adjust in user menu. You have to go first in service menu and select Memory settings --- Initialize EEPROM.
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5. Workshop Maintenance
5.1. Important Safety Notice
The components, which are important for safety, are marked with special mark ! on the circuit diagram. It is essential that these critical parts should be replaced with manufacture's specified parts to prevent X--radiation, shock, fire or other hazards. For your own safety, use always safety isolating transformer when repairing the monitor.
5.1.1. Discharging the CRT
High voltage circuitry includes bleeder resistor which normally discharges the tube in about 5 seconds after the power is switched off. If you -- for safety reasons -- want to be sure about the discharging, do as follows: Wear safety goggles. A cracked CRT may implode when discharged. The signal cable must be disconnected from the computer. To discharge the CRT, a flat--head screwdriver with grounding cable is required. -- Disconnect the signal cable. -- Connect the metal chassis of the monitor to reliable earth. -- Connect the grounding wire to the screwdriver. -- Connect the other end of the grounding wire to the chassis (earth). -- Insert the screwdriver under the rubber cap of the EHT connector to discharge the tube.
5.2. ESD-Sensitive Parts
To prevent damage, when working with electrostatic discharge (ESD) sensitive parts, observe the following instructions: -- Keep the ESD--sensitive part in its original shipping container until you are ready to install the part into the component card. -- Just before touching the ESD--sensitive part, discharge to the monitor any static electricity in your body; do this by touching the metal frame or cover of the machine. If possible, keep one hand on the frame when inserting or removing a logic card, for example. -- Hold the ESD--sensitive part by its edge; do not touch its pins.
5.3. Test Equipment
The following test equipment are required to adjustment procedure. -- Safety isolating transformer -- Digital multimeter: Fluke 87 or equivalent true RMS multimeter -- High voltage probe: e.g. Fluke 80--40k -- Signal generator: VTG220 + PC or programmable video generator -- Colour analyzer: e.g. Minolta TV Colour Analyzer CA100 -- Convergence Gauge (CM7AR or equivalent) -- Oscilloscope 40--100 MHz band width -- Hi--Pot tester (Flash tester with insulation measurement / Leakage current / Break down voltage) -- ESD protection necessary
5.4. Test Patterns
1 2 3
Active vertical video time Active horizontal video time 1
4
5
pixelpixelpi pixelpixelpi pixelpixelpi pixelpixelpi
Full White
Active vertical video time
A--- area B--- area
Active horizontal video time
-2
-3
--4 5
Black Picture Signal level = 0 V at each RGB input Highlight grey scale tracking Signal level = 700 mV in the window at each RGB input Crosshatch Picture Squares e.g. 20 mm x 20 mm Outmost lines correspond the active vertical/horizontal video time Convergence test pattern Focus test pattern 446F 19
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
on both sides
Push open Do not twist
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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 surface 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 environmental conditions. Before performance measurements the monitor must have been in room temperature (20+/ --- 5 degrees C) for at least 2 hours. After that the monitor must have been warmed up with power on at least 60 minutes. The monitor shall be positioned to a magnetic field, which is specified as 0 G horizontal field and 0.45 G vertical field (Northern Hemisphere) when ever the image performance is measured. If there is no standardised magnetic field available, the monitor should be positioned face to east. All image performance specifications will be met in diffuse ambient 500 lux. All the performance specifications are met when using factory adjusted timing modes within line frequencies 48 kHz --- 107 kHz. The timings below 48 kHz line frequency are usable, but not specified. Performance is optimised for 1280 x 1024, 85 Hz (VESA) resolution.
6.1. Image stabilising time
The image shall begin to be visible in a 500 lux environment within 15 seconds of application of power and input signals. The image shall be stabilised within 30 seconds of application of power and input signals. "Stabilised" means that no significant changes shall occur in the image quality specifications, such as image brightness, size, linearity and so on. The image shall reach performance stability within 20 minutes of the application of power and input signals. "Performance Stability" means that the display monitor shall meet all of its image quality specifications.
6.2. Colour temperature and tracking
The default colour temperature is 9300 °K Measurement conditions: --- test pattern 50*50 mm white field at the screen centre --- brightness control adjusted for a background raster luminance level of 1 nit --- input signals R, G, B with maximum amplitude When contrast ---control is adjusted for 100 nit's luminance level, the factory adjusted colour coordinates measured at the screen centre will be: x = 0.283 +/ --- 0.015 = x ref y = 0.297 +/ --- 0.015 = y ref When contrast ---control is adjusted from a luminance level of 100 cd/m2 to 35 cd/m2 or its adjust stop, the colour coordinates measured at the screen centre will be: x = x ref +/ --- 0.015 y = y ref +/ --- 0.015
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6.3. White Uniformity
Measurement conditions: --- Full screen picture size, Brightness in middle 100 nit --- Magnetic field horizontal 0 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. Colour coordinates from corner to center: d(x) = ± 0.015 d(y) = ± 0.015
6.4. Colour Purity
There should not be visual discoloration with each of the red, green and blue beams after the tube is moved to any directions. Measurement conditions: same as spec. 8.3
6.5. Luminance
--- Definition: The following methodology and definition of luminance shall be applicable throughout this specification. Luminance shall be measured on 1280 x 1024 85 Hz pixel format at five areas, using two different pictures: 1. In the center of the screen white field 50*50 mm. 2. Full white field. The five areas are defined as: L0 Center of the screen L1 Upper left of the screen L2 Upper right of the screen L3 Lower left of the screen L4 Lower right of the screen --- Requirements Maximum contrast luminance: With the brightness control set so that background brightness is 1 nit and the contrast control set to maximum. L0 = 140 +/ --- 20 nits (41 Ft ---L) 50*50 mm white field L0 = 110 +/ --- 10 nits (32 Ft ---L) Full white field Minimum luminance Using full white picture, with the brightness and contrast controls in minimum, the foreground full white field (L0) < 5 nits. Background luminance: The luminance of the background, measured at center of the screen without active video and in the absence of significant ambient illumination, brightness at maximum must be: 1 nit.=< L0 =< 7 nits The background shall be extinguished before brightness control reaches its end. L1 L0 L3 L4 L2
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--- 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. 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 Ft ---L). Cross---hatch test pattern. The width and the height are measured at the center of the screen. Requirements: Tolerance Nominal size: Width = 354 mm Height = 265 mm Adjusted mode ±4 ±3 Pre load or GTF based timings : ± 6 mm ± 5 mm
Over the full range of operating temperature, the size shall not change more than one percent.
6.7. Linearity
Cross---hatch test pattern (16 x 12 cells). Brightness control set so that the background raster is just extinguished and the contrast control is set to maximum. The limits for vertical or horizontal non---linearities are 4 % for adjacent cells and 8 % for overall linearity. The method of calculating linearity is: [ (max---min)/max ]*100 < 8 % The measurements are done along the vertical and horizontal center lines of the screen. Frequency range <48kHz non---linearities are 8% for adjacent cells and 12% for overall linearity.
6.8. Geometrical distortion
The distance between bezel and active screen edge shall not vary more than 1.5mm for adjusted mode and 4.0mm for the preloaded mode.
6.9. 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 mm.
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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 minimum of effort. Adjustments can also be made in another order or completely separately.
7.1. Adjustment Flow Diagram
START 6.4 Gray scale Assemblies or components replaced NO Low light See 7.4.2 YES Perform Preliminary preparations See 6.2 The Most Dominant colour See 7.4.1
High light See 7.4.3
Memory replaced NO Reset user memory for display modes to be adjusted See 3.1.2
YES Maximum/Minimum contrast See 7.5
4.2.4 Initializing Switch OFF the monitor and activate service mode Select display mode 00 Initializing Switch OFF the monitor
Focus See 7.6
6.7 Convergence Adjust the convergence in the middle of the tube with static adjustments See 7.7.3
6.3 Geometry
Activate service mode and perform 7.3 para 1), 2) & 3) with 91.376 kHz/85 (GTF642)
Adjust the convergence in the corners of the tube with dynamic adjustments See 7.7.4
Hz
Perform 6.3 para 4) and 5) for all display modes.
The new settings are stored automatically. (4.2.5)
The new settings are stored automatically. (4.2.5)
Exit from service mode See 4.2.6
STOP
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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. Adjust the high voltage to 27.0 ±0.2 kV with RT301 on SMA--board.
Front
RT301
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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. Set Reduce width until both vertical edges of the background are visible. 2) Straighten the picture if tilted. This adjustment is common for all display modes. 3) Centre the background. This adjustment is common for all display modes.
<1.5 mm
=
=
4) Adjust size, position and shape of the picture equal to the mask aperture. Adjust first the properties with largest deviation from the correct value. 5) Adjust final width and height. 6) The distance between bezel and active screen edge shall not vary more than 2.0 mm in vertical and horizontal direction. 7) Repeat steps 4) and 5) for every display mode to be stored. Note that the display mode can be changed without leaving the service mode.
265 - /+ 3 mm
<1.5mm <1.5mm <1.5mm
354 - /+ 4 mm
=
GEOMETRY GREY SCALE SHARPNESS PRODUCT INFORMATION MEMORY SETTINGS Raster Width Horizontal centering Height Vertical centering Pincushion Pincushion balance Trapezoid Orthogonality S Correction C Correction E/W Corner Tilt 00: 1280x1024 85HZ
=
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7.4. Grey Scale
The grey scale is adjusted for 9300K colour temperature. Activate Service Mode in 91.376 kHz/85 Hz (GTF642). 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. 1) Select 91.376/85 (GTF642) black test pattern. to minimum. 2) Set to maximum and 3) Set Blacklevel adjustment RED/GREEN/BLUE Black Level to (step 33) 4) Set RED/GREEN/BLUE Amp (step 33) menu and G2 menu adjustments to center (step130). 5) Place the probe of the colour analyzer in the middle of the screen and adjust with G2 trimmer until the picture illuminance is 3±1.0 cdm2 (Nits) 1) 2) 3) 4) Select 91.376/85 (GTF642) black test pattern. Adjust picture illuminance to 1.0 cdm--2 (Nits)with in servicemenu. in servicemenu to the minimum. Adjust the Adjust the colour coordinates to (9300K) x = 0.283±0.010 y = 0.297±0.010 with RED/GREEN/BLUE Black Level adjustments. Do not adjust the most dominant colour. During the adjustment check if brightness is chancing over tolerance, when needed adjust it back. If Y--- and X---values are getting too far from ideal values, you have chosen wrong MOST DOMINANT COLOUR. Check the dominant colour again according to the instructions. 5) Set to the maximum and check that the illuminance is still 3±1.0 cdm2. If not, adjust with G2 in service menu. 6) Adjust picture illuminance to 1.0 cdm2 (Nits)with in servicemenu and check the colour coordinates. 1) 2) 3) 4) 5)
7.4.1. The Most Dominant Colour
7.4.2. Low Light
FOCUS V FOCUS H G2
Left side view of the chassis
7.4.3. High Light
Select 91.376/85 (GTF642) black test pattern. Adjust with the picture illuminance to 1±0.1 cdm2 (Nits). Select 91.376/85 (GTF642) window test pattern. the picture illuminance in the window to 100±5 cdm2 (Nits) Adjust with Adjust with RED/BLUE Amp the colour coordinates in the window to x = 0.283±0.003 y = 0.297±0.003 Check after adjustment that the illuminance reading is in limits. 6) Back to low light step 4) and check colour coordinates.
1) Set to the maximum. the picture illuminance outside window to 1.0 cdm--2 (Nits). 2) Adjust with 3) Adjust illuminance in the window to 140±5 cdm--2 (Nits) with MAX CONTRAST. to the minimum. 4) Set 5) Adjust the minimum illuminance in the window to 5 ± 1 cdm--2 (Nits) with MIN CONTRAST. 6) Exit from service mode. 1) 2) 3) 4) 5)
7.5. Maximum/Minimum Contrast
7.6. Focus
Select 91.376/85 (GTF642) crosshatch test pattern to the maximum and adjust to 70 % (background faintly visible). Set Adjust the sharpness with FOCUS H and FOCUS V to optimum Adjust until the background is invisible Select focus test pattern. Check that all letters are clearly visible. 446F
pixelpixelpi pixelpixelpi pixelpixelpi pixelpixelpi
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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: -- Deflection yoke trimmers.
7.7.1. Measuring Conditions
-----
Adjust convergence with 91.376/85 (GTF642) line frequency. Make sure that focus is correctly set at the mid-point between the screen center and the edge of the picture. Use white crosshatch test pattern with circle. Adjust to near the maximum and reduce until the background disappears.
7.7.2. Convergence Measuring Gauge CM7AR
The use of the Klein CM7AR Convergence Gauge has been explained here but other types of gauges can be used as well. Check that the adjusting knobs (A & B) are set to zero. - Place the gauge on the line with marking Y up upwards when measuring horizontal line. - Place the gauge on the line with marking X up upwards when measuring vertical line. - If the line has convergence error, the line in the window seems to be broken. - Use knobs A and B to adjust the line continuous. - If the readings are on the opposite side of zero, the convergence error is A+B (e.g. 0.2 + 0.1 = 0.3). - If the readings are on the same side of zero, the convergence error is equal to A if A > B or B if B > A X B Y
0 0.5 0.5 0 0.5 Blue Red Green 0.5 0 0.5
A
The magnet rings has been set to the optimum in the factory. Readjustment is necessary only in case the adjusting magnets have been accidentally moved. 1 Adjust G vertically in the middle between R and B with 6 pole magnet rings. 2 Adjust G horizontally in the middle between R and B with 6 pole magnet rings. 3 Adjust R and B vertically to the same position with G line with 4 pole magnet rings. 4 Adjust R and B horizontally to the same position with G line with 4 pole magnet rings. Lock the rings with paint. 3 1 G R 4 2
Rotating both rings together Purity magnet rings. Do not adjust !
7.7.3. Static Convergence
B
4 pole magnet rings 6 pole magnet rings
3 1
4 2
SMH
Sliding two ring tobs toward or away from each other
1
3
2
4
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0.5
0
0.5
0.5
7.7.4. Dynamic Convergence
Deflection yoke trimmers
B R BR B R B R RB B R R B B RR B
RGB RGB RGB
A--- area B--- area
RB RB RB
R B RB R B
RB RB RB
RGB
RGB
B R R BB R
R BR B RB
RB RB
RB
B R BR B R
R B R B R B B R B R B R R B R B R B B R B R B R
RB RB RB
RB RB RB
BR
BR
RGB
RGB
RB
RB
See 7.7.3. Purity magnet rings. Do not adjust !
BR
RB
RB
RB
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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 transportation 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. Beamlanding adjustment handle to purity.
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