Apple Multiple Scan Display 1705 Manual do Utilizador

Service Source K Apple Multiple Scan 1705Display

Specifications Characteristics - 2 Scan Rates Vertical refresh rate: 47-120 HzHorizontal scan rate: 31-65 kHzIn addition, to the above scan rates, t

Take Apart Video Interconnect Cable - 62Caution: Care must be taken not to disturb the user brightness and contrast control knobs while lifting the v

Take Apart Video Interconnect Cable - 636 Remove the cable from the nylon support.Note: Connector on P703 is hot-glued.7 Disconnect the cable from P7

Take Apart Video Interconnect Cable - 64• Insert a small flat blade screw-driver between the connector and the tab.• Gently move the tab away from th

Take Apart Video Interconnect Cable - 658 Carefully straighten the tabs on the cover shield plate.9 Remove the cover shield plate from the video boar

Take Apart Video Interconnect Cable - 6610 Disconnect the 12-wire cable from P302 on the video board.• Insert a small flat-blade screwdriver between

Take Apart Video Interconnect Cable - 67• Repeat this procedure for the other side of the connector.11 Remove the cable from the monitor.

Take Apart - 68Multiple Scan 1705 Display Simplified Wiring DiagramP901P902P703P601P702P701P704FBTP302 P301P304AC Socket

Service Source K Additional Procedures Apple Multiple Scan 1705Display

Additional Procedures Introduction - 1 Introduction The “Adjusting the Degaussing Coils” procedure describes the proper position of the degaussing c

Additional Procedures Adjusting the Degaussing Coils - 2 Adjusting the Degaussing Coils Before you begin, refer to the Take Apart chapter to remove•

Specifications Characteristics - 3 System Compatibility This display works with most IBM PC-compatible computers equipped with VGA (Video Graphics A

Additional Procedures Adjusting the Degaussing Coils - 3 1 At the top two corners of the CRT, release the degaussing coil from the two bendable tabs

Additional Procedures Adjusting the Degaussing Coils - 4 3 Note: Do not remove the board assemblies. The illustration at left shows the boards rem

Additional Procedures Adjusting the Degaussing Coils - 5 5 At the bottom two corners of the CRT, release the degaussing coil from the two bendable t

Additional Procedures Adjusting the Degaussing Coils - 6 6 Note: Do not remove the board assemblies.Pull the degaussing coil downward until the ov

Service Source K Adjustments Apple Multiple Scan 1705Display

Adjustments User Adjustments - 1 User Adjustments The image adjusted by the user is saved into the memory on the monitor CPU (Central Processing Uni

Adjustments User Adjustments - 2 Controls A flip-down door covers the controls on the front of the monitor. Gently push on the top center of the doo

Adjustments User Adjustments - 3 Brightness Rotate the brightness control clockwise or counterclockwise to increase or decrease brightness. Contras

Adjustments User Adjustments - 4 Geometry Horizontal Center 1 Press and hold the SELECT button until the indicator light for the horizontal center

Adjustments User Adjustments - 5 Width of Picture 1 Press and hold the SELECT button until the indicator light for the width icon goes on.2 Press th

Specifications Characteristics - 4 Power Macintosh 7500Power Macintosh 720024-bit: 16.7 million colors24-bit: 16.7 mil-lion colorsPower Macintosh 62

Adjustments User Adjustments - 6 Vertical Center 1 Press and hold the SELECT button until the indicator light for the vertical center icon goes on.

Adjustments User Adjustments - 7 Height of Picture 1 Press the SELECT button until the indicator light for the height icon goes on.2 Press the DOWN

Adjustments User Adjustments - 8 Picture Curvature 1 Press and hold the SELECT button until the indicator light for the picture curvature icon goes

Adjustments User Adjustments - 9 Picture Side Alignment 1 Press and hold the SELECT button until the indicator light for the side alignment icon goe

Adjustments User Adjustments - 10 Degauss Press the DEGAUSS button to degauss the monitor.

Adjustments User Adjustments - 11 Factory Settings Note: Picture controls are generally fine-tuned by the user.To revert to the factory settings, p

Adjustments Non User Adjustments - 12 Non User Adjustments Warning: This product contains high voltage and a high-vacuum picture tube. To prevent s

Adjustments Non User Adjustments - 13 Light Meter Setup Note: When a color analyzer or photometer are not available, use an R77, a 246, or an L-248

Adjustments Non User Adjustments - 14 Model R77 The R77 light meter is capable of reading luminance from 10 to 1,000 footcandles (fc). Before you be

Adjustments Non User Adjustments - 15 Three scales are shown on the light meter:• 200-1000 fc• 50-250 fc• 10-50 fcBecause display screen luminance t

Specifications Characteristics - 5 Quardra 660AV,Quadra 840Av, 900,9508-bit: 256 colors8-bit: 256 colorsno memory upgrade16-bit: 32 colorsCentris 61

Adjustments Non User Adjustments - 16 To measure a display screen’s luminance,1 Set the scale switch to the bottom position (to set up the 10-50 fc

Adjustments Non User Adjustments - 17 readings, verify the readings with a known-good light meter or photometer. Also check the age of the R77 light

Adjustments Non User Adjustments - 18 Model 246 Note: Follow this procedure to set up the meter when making brightness adjustments.1 Remove the met

Adjustments Non User Adjustments - 19 Note: The white disk lens is removed only for some procedures.2 Remove the white disk lens. Turn it countercl

Adjustments Non User Adjustments - 20 3 Rotate the lens head of the meter to face the monitor.

Adjustments Non User Adjustments - 21 4 Hold the lens against the middle of the monitor screen.

Adjustments Non User Adjustments - 22 Model L-248 Note: Follow this procedure to set up the meter when making brightness adjustments.1 Press the re

Adjustments Non User Adjustments - 23 2 Slide the scale selector to the lower position to access the 2 to 10 scale.

Adjustments Non User Adjustments - 24 3 Slide the selector to the upper position to access the 10 to 18 scale.

Adjustments Non User Adjustments - 25 4 Slide the diffuser away from the lens when using the meter to read brightness.

Specifications Characteristics - 6 Cards: 4 • 8, 8 • 24,8 • 24GCMacintosh II, IIx IIcx, IIfxThis group of computers and cards are not directly compa

Adjustments Non User Adjustments - 26 5 Hold the lens against the middle of the monitor screen.6 Press the button on the right to take the reading.

Adjustments Non User Adjustments - 27 Raster Center Adjustment Before you begin, remove the following: • Rear Housing• EMI Shield1 Using Display Ser

Adjustments Non User Adjustments - 28 3 Adjust VR701 (H-RASTER CENTER) so the picture is horizontally centered on the screen.

Adjustments Non User Adjustments - 29 Focus Adjustment Before you begin, remove the following: • Rear Housing• EMI Shield1 Using Display Service Uti

Adjustments Non User Adjustments - 30 3 Adjust the focus at VR F1 and F2 on the flyback transformer, until the focus test pattern reaches the best p

Adjustments Non User Adjustments - 31 High-Voltage Adjustment Note : Adjust the high voltage whenever a module is replaced or if the setting at VR50

Adjustments Non User Adjustments - 32 1 Using Display Service Utility, select the display pattern containing a grid on a white field.2 Using the hei

Adjustments Non User Adjustments - 33 3 Attach the multimeter.• Attach the negative probe to the chassis (ground).• Hold the positive probe to the

Adjustments Non User Adjustments - 34 Cutoff and White Balance Adjustments Before you begin, • Run the monitor for a minimum of 15 minutes.• Degauss

Adjustments Non User Adjustments - 35 CRT before color and brightness can be reproduced correctly.

Specifications Controls and Ports - 7 Controls and Ports User Controls PowerFront panel: brightness and contrast control knobs; degauss button; down

Adjustments Non User Adjustments - 36 Presets for Cutoff and White Balance Adjustments 1 Set the user controls to maximum brightness and contrast (c

Adjustments Non User Adjustments - 37 2 Adjust VR305 (SUB BRIGHT) to its maximum position (clockwise).

Adjustments Non User Adjustments - 38 3 Adjust VR704 (SUB-CONTRAST) to its center position.

Adjustments Non User Adjustments - 39 4 Adjust VR301 (G-DRIVE) and VR302 (R-DRIVE) to their center positions.

Adjustments Non User Adjustments - 40 5 Adjust VR303 (R-BIAS) and VR304 (G-BIAS) to their minimum positions (counter- clockwise).

Adjustments Non User Adjustments - 41 Cutoff Adjustment Note: If presets were done correctly, when the white screen is displayed using Display Serv

Adjustments Non User Adjustments - 42 3 Adjust the screen control until the display luminance measures:• 10 on the bottom scale of light meter model

Adjustments Non User Adjustments - 43 Note: VR304 and VR303 may have to be adjusted several times to obtain a neutral gray.4 Use Display Service Ut

Adjustments Non User Adjustments - 44 6 Adjust VR305 (SUB-BRIGHT) until the display luminance measures:• Between 15 and 20 on the bottom scale of li

Adjustments Non User Adjustments - 45 White Balance Adjustment Note: Cutoff must be properly set before the white balance can be adjusted. If the c

Specifications Physical and Electrical - 8 Physical and Electrical Power Supply Universal power supplyVoltage: AC 90-264 volts (V)Frequency: 47/63

Adjustments Non User Adjustments - 46 2 Adjust VR704 (SUB-CONTRAST) until the display luminance measures:• 26 on the bottom scale of light meter mod

Adjustments Non User Adjustments - 47 3 Select the all-white display pattern. 4 Adjust VR703 (ABL) until the luminance measures:• 16 on the bottom

Adjustments Non User Adjustments - 48 5 Set the user brightness control to the middle position.

Adjustments - 49 Apple Multiple Scan 1705 Display Adjustment Points Use this drawing to locate the adjustment points on the main deflection and vid

Service Source K Exploded View Apple Multiple Scan 1705Display

Exploded View 1922-1840Housing, Rear922-1841Monitor Stand,Tilt/Swivel922-1847Latch, ControlPanel Cover922-1843Cover, Control Panel922-1846Switch, O

Specifications Environmental - 9 Environmental Temperature Operating: 50°F to 104°F (10°C to 40°C) Shipping: -4 ° F to 151 ° F (-40 ° C to 65 ° C )S

Service Source K Troubleshooting Apple Multiple Scan 1705Display

Troubleshooting General/ - 1 General In this chapter, you will find Symptom Charts designed to help you diagnose and repair the Multiple Scan 1705 D

Service Source K Basics Apple Multiple Scan 1705Display

Troubleshooting First Checklist/ - 2 First Checklist Important: Many Apple Multiple Scan Display modules returned for repair are found to be fully

Troubleshooting First Checklist/ - 3 • Vertical refresh rate of 47-120 hertzFor more information on what computers or video cards are compatible wit

Troubleshooting First Checklist/ - 4 A maladjusted screen can mimic the symptoms of deflection board or CRT failures. By performing the adjustment p

Troubleshooting Symptom Charts/No Raster - 5 Symptom Charts No Raster No raster with LED on 1 Check monitor cable connections. Thumbscrews must be t

Troubleshooting Symptom Charts/No Raster (Continued) - 6 No Raster (Continued) No raster with LED off 1 Ensure that power cord is plugged in prop

Troubleshooting Symptom Charts/No Raster (Continued) - 7 No Raster (Continued) No raster with LED yellow1 Check video cable connections at comput

Troubleshooting Symptom Charts/Video - 8 Video Screen flickers 1 Check the monitor cable connections. The thumbscrews must be tightened securely. If

Troubleshooting Symptom Charts/Video (Continued) - 9 Video (Continued) Screen is blurred 1 Adjust Focus at VR F1 and F2. See “Focus Adjustment”

Troubleshooting Symptom Charts/Video (Continued) - 10 Video (Continued) Colors are too green, red, or blue, and the screen is unreadable1 Ensure

Troubleshooting Symptom Charts/Geometry - 11 Geometry Raster is too short, tall, narrow, or wide1 Adjust the width and height of the screen. See “Us

Basics - 1 Overview The Apple Multiple Scan 1705 Display is a low-cost monitor with a 17-inch CRT (15.8-inch viewable image size).This monitor come

Troubleshooting Symptom Charts/Geometry (Continued) - 12 Geometry (Continued) Raster is not centered 1 Check that the distortion is not due to en

Troubleshooting Symptom Charts/Miscellaneous - 13 Miscellaneous Indicator light goes out before adjustment of display controls is completedThe LED w

Troubleshooting Checking High Voltage - 14 Checking High Voltage ± Warning: Read all of the warnings, notes, and steps of this procedure before be

Troubleshooting Checking High Voltage - 15 Before you begin, remove:• Rear Housing• EMI Shield1 Attach the Apple high-voltage probe to the multimete

Troubleshooting Checking High Voltage - 16 Note: Refer to these pictures when using the “No Raster Flowchart.”A

Troubleshooting No Raster Flowchart - 17 No Raster FlowchartCheck High-VoltageDidmultimeterread 25.0 VDC(25 kv ?)1. Set multi-meter to DC.2. Attach

Troubleshooting No Raster Flowchart (Continued) - 18 No Raster Flowchart (Continued)Measure voltage at pin 8(labeled 6.3V).See Picture A.Doesmult

Troubleshooting No Raster Flowchart (Continued) - 19 Slowly turn screen the control on theflyback transformer, clockwise.See picture C.Doesraster

Service Source K Take Apart Apple Multiple Scan 1705Display

Take Apart Special Safety Precautions - 1 Special Safety Precautions The only potential source of X-Radiation is the CRT. When the high voltage circ

Basics - 2 Features Features of the 1705 monitor are• A 17-inch color display• Three different and independent lines to drive for red, green, and b

Take Apart Monitor Stand - 2 Monitor Stand No first steps required. 1 Remove the video and power cables from the back of the monitor. Caution: When

Take Apart Monitor Stand - 3 2 Place the monitor face down on a protective mat.

Take Apart Monitor Stand - 4 3 Depress the tab on the rear of the housing, just behind the monitor stand.

Take Apart Monitor Stand - 5 4 Slide the monitor stand toward the back of the monitor and remove.

Take Apart Control Panel Cover - 6 Control Panel Cover No first steps required. Caution: Grasp the cover as close to the hinge as possible, or the c

Take Apart Rear Housing - 7 Rear Housing First: No first steps required Warning: This product contains high voltage and a high-vacuum picture tube.

Take Apart Rear Housing - 8 1 Remove the power and video cables from the monitor. Caution : When the monitor is face down, it is resting on the CRT

Take Apart Rear Housing - 9 2 Place the monitor face down on a protective mat.

Take Apart Rear Housing - 10 3 Remove four screws securing the rear housing to the bezel.4 Lift the rear housing from the chassis.

Take Apart EMI Shield - 11 EMI Shield Before you begin, remove the rear cover. Warning: This product contains high voltage and a high-vacuum pictur

Basics - 3 Adjustments that can be made with the user controls are• Brightness• Contrast• Horizontal center• Width of picture• Vertical center• Pic

Take Apart EMI Shield - 12 1 Remove two screws securing the ground wires to the left and right side brackets.2 Remove two screws securing the ground

Take Apart EMI Shield - 13 4 Remove two screws securing the EMI shield to the main bracket.5 Remove two screws securing the EMI shield to the rear f

Take Apart EMI Shield - 14 6 Tilt the EMI shield so the shield tabs clear the slots in the rear fence and lift off. Replacement Note: If you need t

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 15 Main Deflection, CRT/Video Boards and Rear Fence Before you begin: • Remove Rear Ho

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 16 1 Set the monitor on the bottom bracket.

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 17 2 Disconnect two ground wires from the video board.

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 18 3 Disconnect the two-wire cable from P303 on the video board.4 Disconnect the groun

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 19 5 Remove one screw securing the ground wire to the rear fence.

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 20 Caution: Damage will occur if the CRT is marred with pliers when removing the hot

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 21 Caution: CRT pins are easily damaged. Gently rock the video board back and forth w

Basics - 4 Troubleshooting and Repair Tips The monitor stand does not need to be removed before the rear housing is removed.When the video and main

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 22 Warning: Be sure the monitor has no power and the CRT has been properly discharged

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 23 Caution : When the monitor is face down, it is resting on the CRT screen. The CRT m

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 24 10 Remove four screws (two each bracket) securing the left and right side brackets

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 25 11 Remove two screws securing the main bracket to the bezel.

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 26 12 Lift and tilt the video and main deflection board assembly away from the CRT. Re

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 27 13 Disconnect the two-wire cable from P701 on the main deflection board.14 Disconne

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 28 15 Disconnect the two-wire cable from P902 on the main deflection board and remove

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 29 Caution: Ground cables are supporting the weight of the video and main deflection

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 30 17 Remove the user brightness and contrast knobs from the controls on the main defl

Take Apart Main Deflection, CRT/Video Boards and Rear Fence - 31 18 Remove the screw securing the right side bracket to the bottom bracket.19 Slide

Basics - 5 Special Tools When adjusting the monitor, check luminance readings using a color analyzer or photometer. If such equipment is not availa

Take Apart Bezel - 32 Bezel Before you begin, remove the following: • Rear Housing• EMI Shield Warning: This product contains high voltage and a hi

Take Apart Bezel - 33 1 Place a sturdy, non- abrasive object (such as a large book about 3” x 11” x 8”) next to the monitor.2 Lift the monitor from

Take Apart Bezel - 34 4 Remove two screws securing the ground straps to the bottom bracket.

Take Apart Bezel - 35 5 Remove four screws securing the left and right side brackets (two screws each) to the bezel.6 Remove the two screws securing

Take Apart Bezel - 36 7 Remove the four screws securing the D-coil holders and CRT to the bezel. Replacement Note: Be sure to install the D-coil ho

Take Apart Bezel - 37 8 Gently slide the monitor so the bezel is no longer supported by the object and let the bezel rest on the protective surface.

Take Apart Bezel - 38 9 Position two supports (1.5 to 2 inches tall) on the protective surface about one foot apart.10 Carefully lift the CRT and v

Take Apart Bezel - 39 Replacement Note: Carefully line up the brightness and contrast controls into the bezel when installing. The controls will bi

Take Apart Brightness and Contrast Knobs - 40 Brightness and Contrast Knobs Warning: This product contains high voltage and a high-vacuum picture t

Take Apart On/Off Switch with Spring - 41 On/Off Switch with Spring Warning: This product contains high voltage and a high-vacuum picture tube. To

Service Source K Specifications Apple Multiple Scan 1705Display

Take Apart On/Off Switch with Spring - 42 Note: The switch is spring loaded and will fly when pushed from the bezel.1 Pinch two retainers on the on

Take Apart Control Panel Cover Latch - 43 Control Panel Cover Latch Before you begin, remove the following • Rear Housing.• EMI Shield• Bezel1 Prop

Take Apart Control Panel Cover Latch - 44 3 With an object about one-half inch in diameter and three inches long, drive the latch from the inside of

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 45 Rear Fence, Internal Video, AC Inlet Assembly Before you begin, remove the following:

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 46 1 Remove all wires from the nylon support on the right side bracket.

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 47 Note: Steps 2 through 7 are for accessing P901 only.2 Remove two screws securing the

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 48 5 Gently lift the right side of the bottom bracket so the side bracket just clears the

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 496 Slide the side bracket from the main bracket support and remove.

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 507 Support the main deflection board with your hand.8 Disconnect the two-wire cable from

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 519 Remove the screw securing P704 cable to the rear fence.

Specifications Characteristics - 1 Characteristics Picture Tube Size/Active Video Display area 17 inches FST, 15.8-inch diagonal viewable image size

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 5210 Remove the screw securing the video board ground wire to the fence

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 5311 Carefully straighten the tabs on the cover shield plate.12 Remove the cover shield pl

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 5413 Disconnect the twelve- wire cable from P301 on the video board.• Insert a small flat-

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 55• Repeat this procedure for the other side of the connector and remove.14 Remove two sc

Take Apart Rear Fence, Internal Video, AC Inlet Assembly - 5615 Remove two screws securing the fence to the back of the main and bottom brackets.16 S

Take Apart Video Interconnect Cable - 57Video Interconnect CableBefore you begin, remove the following:• Rear Housing• EMI ShieldWarning: This produc

Take Apart Video Interconnect Cable - 581 Remove two ground wires from the top of the video board.

Take Apart Video Interconnect Cable - 59Warning: Be sure the monitor has no power and the CRT has been properly discharged. Serious injury could occu

Take Apart Video Interconnect Cable - 603 Remove four screws (two each bracket) securing the left and right side brackets to the bezel.

Take Apart Video Interconnect Cable - 614 Remove two screws securing the main bracket to the bezel.