Digital Equipment VR320 Service Manual
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Digital Equipment VR320 Service Manual

Vr320 monitor
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VR320 Monitor Service Guide
Order Number EK-VR320-SV-001
Digital Equipment Corporation

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Summary of Contents for Digital Equipment VR320

  • Page 1 VR320 Monitor Service Guide Order Number EK-VR320-SV-001 Digital Equipment Corporation...
  • Page 2 First edition, April 1990 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document.

  • Page 3: Table Of Contents

    Contents About This Manual Overview Product Description ....... . 1–1 1.1.1 Refresh Rate .
  • Page 4 VPARAB) ........4–27 Changing Refresh Rates Refresh Rates of VR320 Monitors ..... 5–1 Changing the Refresh Rate .
  • Page 5 Index Figures 1–1 VR320 Color Monitor ....... 1–1 3–1 Power Switch/Indicator ......
  • Page 6 vi Contents 3–30 Crushing the Evacuation Point ..... . . 3–38 4–1 User Adjustments ....... . . 4–3 4–2 Radiance Meter .
  • Page 7 Tools and Equipment ....... 1–2 1–3 VR320 Recommended Spare Parts ..... 1–3 2–1 Blank Screen, No Video or Raster .

  • Page 8: About This Manual

    About This Manual This guide describes how to service your VR320 monitor. Guide Organization This guide covers the following topics: • Chapter 1 provides a general overview of the product and includes a list of spare parts. • Chapter 2 describes the troubleshooting procedures.

  • Page 9: Overview

    Overview 1.1 Product Description The VR320 color monitor (Figure 1–1) has a direct viewed, 485 mm, antiglare CRT with contrast enhancement. The built-in tilt-swivel assembly lets the user adjust the screen for viewing comfort. When connected to a host system, the monitor can display information sent to the host system and information the host system sends to it.

  • Page 10: Refresh Rate

    Refer to Chapter 5. 1.1.2 Model Variations Table 1–1 lists the different VR320 models and their refresh rates. Table 1–1 Refresh Rates of Monitor Models Model...

  • Page 11: Recommended Spare Parts

    Overview 1–3 1.3 Recommended Spare Parts The following are the recommended spare parts for the VR320 monitor: Table 1–3 VR320 Recommended Spare Parts Spares Part Number Power supply module 54-19621-01 Deflection module 54-19301-01 Video casting assembly 70-27010-01 Interconnect cable 70-27000-01...

  • Page 12: Troubleshooting

    Troubleshooting This chapter describes how to troubleshoot a VR320 monitor problem through fault isolation. 2.1 Before You Start The following information will help you troubleshoot the monitor easily and effectively: WARNING If you smell burning components, press the monitor power switch to off and disconnect the power cord.

  • Page 13: Troubleshooting Tables

    2–2 Troubleshooting Troubleshoot the VR320 monitor as follows: 1. Ask the operator to describe the problem. The operator often is the most knowledgeable person. 2. Identify the problem. The screen display often indicates which problem is occurring. 3. Isolate the problem. Refer to the troubleshooting tables to find the suggested solutions.

  • Page 14: Blank Screen, No Video Or Raster

    Troubleshooting 2–3 Table 2–1 Blank Screen, No Video or Raster Symptom Possible Cause Suggested Solution Blank screen, no Power cord is not Connect the power cord to video or raster. connected. the power source or monitor. Power to the monitor is on (power switch Low or no power Use another power source.

  • Page 15: Blank Screen, No Video But Raster Present

    2–4 Troubleshooting Table 2–2 Blank Screen, No Video but Raster Present Symptom Possible Cause Suggested Solution No video or cursor Host screen saver is Press any key to reactivate the is visible even when activated. display. the contrast control is at maximum; Power to the host Turn power to the host system however, raster is...

  • Page 16: Loss Of Synchronization

    If green is present, If another VR320 monitor is the problem is with available, swap the monitors the monitor or host and see if the problem system.

  • Page 17: Color Problems

    2–6 Troubleshooting Table 2–3 (Cont.) Loss of Synchronization Symptom Possible Cause Suggested Solution Deflection module is Replace the deflection module faulty. (Section 3.2.2). If the problem Replace the video casting continues, the video assembly (Section 3.2.6). casting assembly is faulty. If the problem still Repair the host system.
  • Page 18 Troubleshooting 2–7 Table 2–4 (Cont.) Color Problems Symptom Possible Cause Suggested Solution Green color is missing, but Swap red and green Repair the monitor. video is in sync. video cables at the monitor. If green is still missing, the problem is in the monitor.

  • Page 19: Poor Display Quality: Color, Brightness, Geometry, Or Focus

    2–8 Troubleshooting Table 2–5 Poor Display Quality: Color, Brightness, Geometry, or Focus Symptom Possible Cause Suggested Solution Poor centering. Centering controls Adjust the centering controls on top of the monitor on top the monitor and check or on the deflection the deflection adjustments.
  • Page 20 Troubleshooting 2–9 Table 2–5 (Cont.) Poor Display Quality: Color, Brightness, Geometry, or Focus Symptom Possible Cause Suggested Solution CRT wearout Replace the CRT/chassis assembly (Section 3.2.7) only after trying all the other solutions. Poor color balance. Video casting Perform all color adjustments. assembly is out of Refer to Chapter 4.
  • Page 21 2–10 Troubleshooting Table 2–5 (Cont.) Poor Display Quality: Color, Brightness, Geometry, or Focus Symptom Possible Cause Suggested Solution CRT/chassis Replace the CRT/chassis assembly is faulty assembly (Section 3.2.7) only after trying all the other solutions. Display characters AC electromagnetic If possible, remove seem to flicker or interference from electromagnetic devices from...

  • Page 22: Removing And Replacing Frus

    Removing and Replacing FRUs This chapter describes how to remove and replace the VR320 monitor field replaceable units (FRUs). 3.1 Procedures Perform all the removal and replacement procedures from the rear of the monitor. Tilt the monitor from the back to the front allowing easier access to the FRUs.

  • Page 23: Rear Cover Removal

    3–2 Removing and Replacing FRUs 3.1.1 Rear Cover Removal Remove the rear cover as follows: 1. Turn power to the monitor off (Figure 3–1). P o w e r S w i t c h / I n d i c a t o r M A - 1 2 5 5 - 8 9 .

  • Page 24: Removing The Power Cord

    Removing and Replacing FRUs 3–3 2. Unplug the power cord from the power source first, then from the monitor (Figure 3–2). P o w e r C o r d P o w e r S o u r c e f r o m Ho s t S y s t e m M A - 1 0 2 0 - 8 9 .

  • Page 25: Removing The Signal Cables

    3–4 Removing and Replacing FRUs 3. Remove the three signal cables from the rear of the monitor (Sample, Figure 3–3). Push each connector in and turn it left until the signal cable is released from the connector. RG B Si gn al Ca bl es M A - 1 0 2 1 - 8 9 .

  • Page 26: Removing The Rear Cover

    Removing and Replacing FRUs 3–5 4. Use a 9/32 Allen driver to loosen the four captive screws that hold the rear cover to the CRT/chassis assembly (Figure 3–4). NOTE The rear cover is difficult to pull. 5. Remove the rear cover by pulling hard on the cover. A l l e n H e a d S c r e w ( 4 ) R e a r C o v e r...

  • Page 27: Top Cover Removal

    3–6 Removing and Replacing FRUs 3.1.2 Top Cover Removal Remove the top cover as follows: NOTE You may hear the fingerstock make a crackling noise when you tilt the cover. 1. Remove the rear cover (Section 3.1.1). 2. Tilt the top cover up (Figure 3–5). T o p C o v e r M A - 1 0 2 3 - 8 9 .

  • Page 28: Removing The Top Cover

    Removing and Replacing FRUs 3–7 3. Slide the top cover toward the back of the monitor (Figure 3–6). T o p C o v e r M A - 1 0 2 4 - 8 9 . D G Figure 3–6 Removing the Top Cover...

  • Page 29: Field Replaceable Units (Frus)

    3–8 Removing and Replacing FRUs 3.2 Field Replaceable Units (FRUs) The FRUs in the VR320 monitor are shown in Figure 3–7. Before replacing any FRUs, see Section 3.1. WARNING Turn the power to the monitor off and remove the power cord before disconnecting or replacing any FRU.

  • Page 30: Interconnect Cable Removal

    Removing and Replacing FRUs 3–9 3.2.1 Interconnect Cable Removal Remove the interconnect cable as follows: 1. Remove the rear cover (Section 3.1.1) and the top cover (Section 3.1.2). 2. Disconnect the interconnect cable (P1) from the power supply module by pulling the connector off the module (J1). 3.

  • Page 31: Deflection Module

    3–10 Removing and Replacing FRUs 3.2.2 Deflection Module CAUTION Use an anti-static protection kit (PN 29-26246-00) when handling the deflection module. Remove the deflection module as follows: 1. Remove the rear cover (Section 3.1.1) and the top cover (Section 3.1.2). 2.

  • Page 32: Disconnecting Cables From The Deflection Module

    Removing and Replacing FRUs 3–11 3. Disconnect the 4-wire, 9-pin yoke cable (P11) by pressing the tabs on the connector (J11) (Figure 3–10). 4. Disconnect the 6-wire, 9-pin flat raster control cable (P6) pressing the tab on top of the connector (J6). 5.

  • Page 33: Removing The Deflection Module

    3–12 Removing and Replacing FRUs NOTE Make sure that none of the cables to the video casting assembly interfere with the removal of the deflection module. 6. Slide the deflection module out of the card guides (Figure 3–11). C a r d G u i d e D e f l e c t i o n M o d u l e...

  • Page 34: Refresh Rate Switch On The Deflection Module

    Removing and Replacing FRUs 3–13 NOTE Before you replace the deflection module, make sure that the 66/72 Hz refresh switch near the left side of the module (Figure 3–12) is set correctly for your system. Check the setting on the module you are replacing and move the switch if needed as follows: Refresh Rate Switch Position...
  • Page 35 3–14 Removing and Replacing FRUs 3.2.3 Discharging the CRT You must discharge the CRT before removing the following FRUs: • Power supply module • Video casting assembly • CRT/chassis assembly Discharging the CRT is a process that drains to ground any voltages that remain in the CRT and in the extra-high tension (EHT) cable after turning power off.

  • Page 36: Removing The Crt Anode Cable From The Clamp

    Removing and Replacing FRUs 3–15 C R T A n o d e C o n n e c t o r C a b l e C l a m p M A - 1 0 4 6 - 8 9 . D G Figure 3–13 Removing the CRT Anode Cable from the Clamp...
  • Page 37 3–16 Removing and Replacing FRUs 4. Attach the clip end of the anode discharge tool (PN 29-24717-00) to the metal on the power supply or the video casting assembly (Figure 3–14). (Do not put the clip on the painted surface of the monitor.) WARNING Keep your free hand away from any part of the monitor during...

  • Page 38: Discharging And Removing The Crt Anode

    Removing and Replacing FRUs 3–17 A n o d e D i s c h a r g e T o o l A . P u s h i n t h e d i r e c t i o n o f t h e a r r o w .

  • Page 39: Power Supply Module Removal

    3–18 Removing and Replacing FRUs 3.2.4 Power Supply Module Removal Remove the power supply module as follows: WARNING You must discharge the CRT (Section 3.2.3) before removing the power supply module. 1. Remove the rear cover (Section 3.1.1) and the top cover (Section 3.1.2). 2.

  • Page 40: Removing The Dynamic Focus Cable

    Removing and Replacing FRUs 3–19 3. Disconnect the 1-wire, 2-pin dynamic focus cable (P8) from the deflection module by pressing the tabs on the connector (J8) (Figure 3–16). 4. Remove the 1-wire, 2-pin dynamic focus cable from the cable clamp on the inside wall of the video area.

  • Page 41: Removing The Degauss Cable From The Power Supply

    3–20 Removing and Replacing FRUs 6. Disconnect the 4-wire, 4-pin degauss cable (P10) from the power supply module by pressing the tabs on the connector (J10) (Figure 3–17). P o w e r S u p p l y M o d u l e T o V i d e o C a s t i n g D e f l e c t i o n...

  • Page 42: Loosening The Power Supply Screws

    Removing and Replacing FRUs 3–21 7. Loosen the two screws on the power supply module (Figure 3–18). P o w e r S u p p l y M o d u l e Ph il l i ps H e ad Sc r ew s (2 ) M A - 1 0 4 1 - 8 9 .

  • Page 43: Sliding The Power Supply Out (Partially)

    3–22 Removing and Replacing FRUs 8. Slide the power supply partially out to expose the 3-wire, 5-pin LED cable (Figure 3–19). 3 - W i r e , 5 - P i n , L E D C a b l e C a r d G u i d e P o w e r...

  • Page 44: Removing The Led Cable From The Power Supply

    Removing and Replacing FRUs 3–23 9. Disconnect the 3-wire, 5-pin LED cable from the power supply module by pressing the tab on top of the connector (Figure 3–20). P o w e r S u p p l y M o d u l e T o V i d e o C a s t i n g 3 - Wi r e , 5 - P i n ,...

  • Page 45: Disconnecting The Focus Pack And Focus Cables

    3–24 Removing and Replacing FRUs 10. Remove the 1-wire, 3-pin focus pack cable and the two focus cables from the cable clamp on the upper right side of the video casting assembly (Figure 3–21). 11. Disconnect the 1-wire, 3-pin focus pack (P7) cable from the top of the video casting by pressing the tabs on the connector (J7).

  • Page 46: Removing The Power Supply

    Removing and Replacing FRUs 3–25 12. Carefully slide the power supply module (with the two focus cables still attached) out of the card guide (Figure 3–22). 13. Place the power supply on a flat surface close to the monitor. B l a c k a n d W h i t e F o c u s C a b l e s P o w e r...

  • Page 47: Removing The Focus Wires

    3–26 Removing and Replacing FRUs 14. Disconnect the white wire for focus 1 and the black wire for focus 2 from the focus pack (Figure 3–23). NOTE Carefully guide the power supply cabling when removing and replacing the power supply. P o w e r S u p p l y M o d u l e To Vi d eo Ca s t i n g...

  • Page 48: Power Supply Module Replacement

    Removing and Replacing FRUs 3–27 3.2.5 Power Supply Module Replacement NOTE Before replacing the power supply, verify that the 66/72 Hz refresh rate jumper (Figure 3–24) is set correctly for your system. Refresh Rate Move Jumper to Cover 66 Hz Bottom pins (Top pin is free.) 72 Hz Top pins (Bottom pin is free.)

  • Page 49: Attaching The Focus Wires To The Power Supply

    3–28 Removing and Replacing FRUs Replace the power supply module as follows: 1. Pull back the rubber boot on the white wire for focus 1 to expose the connector (Figure 3–25). 2. Connect the white wire for focus 1 until you see it snap into place. 3.
  • Page 50 Removing and Replacing FRUs 3–29 7. Connect the 3-pin, 1-wire cable (P7) to J7 of the video casting assembly. 8. Place the anode cable and dynamic focus cable in front of the power supply before inserting the power supply in the card guides. 9.

  • Page 51: Video Casting Assembly

    3–30 Removing and Replacing FRUs 3.2.6 Video Casting Assembly Remove the video casting assembly as follows: 1. Remove the rear cover (Section 3.1.1). 2. Remove the top cover (Section 3.1.2). 3. Discharge the CRT anode (Section 3.2.3). 4. Remove the power supply (Section 3.2.4). 5.

  • Page 52: Removing Cables From The Video Casting

    Removing and Replacing FRUs 3–31 P l a s t i c T a b P l a s t i c T a b C a b l e C l a m p V i d e o C a s t i n g A s s e m b l y I n t e r c o n n e c t...

  • Page 53: Removing The Plug From The Video Casting

    3–32 Removing and Replacing FRUs 8. Pry the button plug off the video casting assembly with a flat-blade screwdriver (Figure 3–27). V id eo Ca s t i ng Bu t t o n P lu g M A - 1 0 3 2 - 8 9 . D G Figure 3–27 Removing the Plug from the Video Casting...

  • Page 54: Removing The Crt Socket Connector

    Removing and Replacing FRUs 3–33 9. Reach in and pull the CRT socket connector straight toward you and off the pins (Figure 3–28). CAUTION Use care not to bend the pins when you disconnect the CRT socket from the neck of the CRT. So cket Co nn ecto r M A - 1 0 3 3 - 8 9 .

  • Page 55: Removing The Video Casting

    3–34 Removing and Replacing FRUs 10. Loosen the two spring-loaded captive screws until they spring out towards you (Figure 3–29). The screws hold the video casting assembly to the chassis. 11. Gently pull the top of the video casting assembly toward you. 12.

  • Page 56: Crt/Chassis Assembly

    Removing and Replacing FRUs 3–35 3.2.7 CRT/Chassis Assembly Remove the CRT/chassis assembly as follows: 1. Remove the rear cover (Section 3.1.1). 2. Remove the top cover (Section 3.1.2). 3. Remove the deflection module (Section 3.2.2) WARNING You must discharge the CRT (Section 3.2.3) before removing the following FRUs.
  • Page 57 3–36 Removing and Replacing FRUs Handling a CRT • Never handle the CRT by the neck. Always use two hands and hold the CRT by the sides near the face. • Keep the CRT away from your body during handling. •...
  • Page 58 Removing and Replacing FRUs 3–37 Before you perform the following procedure, remove the FRUs listed in Section 3.2.7. 1. Place the old CRT/chassis assembly and the packing material in the container from which you removed the new CRT/chassis assembly. 2. Using pliers, slowly crush, but do not snap, the evacuation point (Figure 3–30).

  • Page 59: Crushing The Evacuation Point

    3–38 Removing and Replacing FRUs M A - X 0 6 6 7 - 8 8 Figure 3–30 Crushing the Evacuation Point...

  • Page 60: Introduction

    Aligning the Video Monitor 4.1 Introduction This chapter describes how to align the monitor. You do not have to perform every adjustment procedure each time you align the monitor; however, you should check all adjustments in the order shown because many adjustments affect each other.

  • Page 61: Displaying Screen Tests

    4–2 Aligning the Video Monitor Clean the Monitor To clean the monitor, use a soft tissue or cloth and a non-abrasive, non-flamable glass cleaner, or use Digital’s video screen cleaner, PN VT3XX-SC. Prepare the Monitor Before you perform adjustments, prepare the monitor as follows: 1.

  • Page 62: Monitor Adjustments

    Aligning the Video Monitor 4–3 4.2 Monitor Adjustments Let the monitor warm up for at least 20 minutes before performing any adjustments. The warm-up time ensures that the electron guns are at a stable temperature before you do any adjustments. The user adjustments are shown in Figure 4–1.

  • Page 63: Using The Radiance Meter

    4–4 Aligning the Video Monitor 4.3 Using the Radiance Meter Use the radiance meter as follows: 1. Remove the protective cap from the radiance meter sensor head and connect the occluder to the radiance meter (Figure 4–2). CAUTION Avoid excessive force when tightening the occluder or you may damage the radiance meter.

  • Page 64: Using The Radiance Meter

    Aligning the Video Monitor 4–5 2. Connect the ac line adapter to the radiance meter and plug it into a wall outlet. Ensure that the radiance meter is in calibration. 3. Turn on the power switch. NOTE Do not use the POWER ON W/BACKLIGHT position when you are using the radiance meter with batteries.

  • Page 65: Color Adjustments

    4–6 Aligning the Video Monitor 4.4 Color Adjustments Figure 4–4 shows the location of the controls used to make the color adjustments. R e d R e d G r e e n C u t o f f G a i n G a i n B l u e B l u e...

  • Page 66: G2 Adjustment

    Aligning the Video Monitor 4–7 1. Set the G2, or SCREEN, to minimum (counterclockwise) (Figure 4–5). M A - 1 0 5 1 - 8 9 . D G Figure 4–5 G2 Adjustment 2. Set the following controls on the video enclosure assembly to minimum (counterclockwise): •...

  • Page 67: Brightness And Contrast Controls

    4–8 Aligning the Video Monitor 3. Use the blank raster pattern for the following steps. 4. Set the brightness and contrast controls (Figure 4–6) to maximum (clockwise). C o n t r a s t B r i g h t n e s s M A - 0 2 4 5 - 9 0 .

  • Page 68: Service Switch And Blue And Red Cutoff

    Aligning the Video Monitor 4–9 5. Slowly turn the G2, or SCREEN, (Figure 4–5) clockwise until the radiance meter shows a value of .002 to .004; the raster is not visible. 6. Set brightness to minimum (counter-clockwise). 7. The screen should be totally blank; if not, repeat steps 1 through 6. 8.
  • Page 69 4–10 Aligning the Video Monitor NOTE Cutoff is the point of operation in a CRT where current does not flow. Adjust and ensure that the cutoff controls are set equally. 9. To adjust the green cutoff, turn the brightness control until a horizontal green line is visible in the middle of the screen.

  • Page 70: Setting Service Switch To Normal Position

    Aligning the Video Monitor 4–11 S er vi c e S w i tch ( U p) M A - 1 3 5 2 - 8 9 . D G Figure 4–8 Setting Service Switch to Normal Position...

  • Page 71: Blue, Green, And Red Gain Controls

    4–12 Aligning the Video Monitor 13. Use the red, green, and blue central rectangle patterns for the gain adjustments. 14. To adjust gain, use the radiance meter (Section 4.3). Adjust the gain controls (Figure 4–9) for the following values: Red screen R.GAIN .095 Green screen...

  • Page 72: Deflection Adjustments

    Aligning the Video Monitor 4–13 4.5 Deflection Adjustments Figure 4–10 shows the location of the controls used to make the deflection adjustments. Pull the deflection module out slightly to see the labels on the controls. HCe n HL in P in Trap W id th V Ce n...

  • Page 73: Vertical Linearity (Vlin)

    4–14 Aligning the Video Monitor This section covers the following adjustments: • Vertical linearity (VLIN) • Vertical centering (VCEN) • Vertical height (HEIGHT) • Horizontal linearity (HLIN) • Horizontal phase (HPHASE) • Horizontal centering (HCEN) • Horizontal width (WIDTH) • Side pincushioning (PIN) •...

  • Page 74: Using The Metric Measuring Tape

    Aligning the Video Monitor 4–15 NOTE In the following steps, use a metric measuring tape (PN 29- 25342) to measure the dimensions of the screen display. To avoid scratching the screen with the tape’s metal clip, start the measurement at 10 cm on the measuring tape. See Figure 4–11. 2 7 3 m m 3 4 2 m m M A - 1 2 5 6 - 8 9 .
  • Page 75 4–16 Aligning the Video Monitor 4.5.1 Vertical Linearity (VLIN) Check and adjust vertical linearity as follows: 1. Verify that the horizontal and vertical centering user controls on the top of the monitor are in the center position of the thumbwheels. 2.

  • Page 76: Vcen, Vhold, And Vlin Controls

    Aligning the Video Monitor 4–17 V C en VH o l d VL i n M A - 0 2 4 6 - 9 0 . D G Figure 4–13 VCEN, VHOLD, and VLIN Controls 4.5.2 Vertical Centering (VCEN) Check and adjust the vertical centering as follows: 1.

  • Page 77: Vertical Height Control

    4–18 Aligning the Video Monitor 4.5.3 Height (HEIGHT) Check and adjust the vertical height as follows: 1. Check the circle-crosshatch pattern for a vertical height of 273 mm 2. If necessary, adjust the HEIGHT control (Figure 4–14) until the display height is 273 mm ( 2.0 mm). Height M A - 1 3 5 6 - 8 9 .

  • Page 78: Horizontal Phase, Horizontal Linearity, And Horizontal Centering (Hphase, Hlin, Hcen)

    Aligning the Video Monitor 4–19 4.5.4 Horizontal Phase, Horizontal Linearity, and Horizontal Centering (HPHASE, HLIN, HCEN) Check and adjust the video display horizontal centering as follows: NOTE Refer to the troubleshooting chart in Chapter 2 for solutions to screen display problems. 1.

  • Page 79: Hphase, Hlin, And Hcen Controls

    4–20 Aligning the Video Monitor H Lin H C e n H Ph as e M A - 1 3 5 7 - 8 9 . D G Figure 4–15 HPHASE, HLIN, and HCEN Controls...

  • Page 80: Horizontal Width Control

    Aligning the Video Monitor 4–21 4.5.5 Horizontal Width (WIDTH) Check and adjust the horizontal width as follows: NOTE In the following steps, use a metric measuring tape (PN 29- 25342) to measure the dimensions of the screen display. To avoid scratching the screen with the tape’s metal clip, start the measurement at 10 cm on the measuring tape (Figure 4–16).

  • Page 81: Horizontal Width Control

    4–22 Aligning the Video Monitor 1. Check the circle-crosshatch pattern for a width of 342 mm ( 2.0 mm). 2. If necessary, adjust the WIDTH control (Figure 4–17) until the display width is 342 mm ( 2.0 mm). Wi dt h M A - 1 3 5 8 - 8 9 .

  • Page 82: Side Pincushioning (Pin)

    Aligning the Video Monitor 4–23 4.5.20 Side Pincushioning (PIN) When the sides of a video display bow, the effect is known as pincushioning or barreling, depending on whether the sides bow in or out. See Figure 4–18 and Figure 4–19. M A - X 0 9 2 5 - 8 8 Figure 4–18 Video Area on Screen Bowed Out...

  • Page 83: Pincushion Adjustment (Pin)

    4–24 Aligning the Video Monitor Check and adjust side pincushioning as follows: 1. Display the circle-crosshatch pattern. 2. Adjust the PIN control (Figure 4–20) until the sides of the display are straight. NOTE Adjusting the PIN control may affect the width adjustment. Recheck the display for correct width (Section 4.5.5).

  • Page 84: Screen Wider At Top

    Aligning the Video Monitor 4–25 4.5.7 Trapezoid (TRAP) Check and adjust the screen display as follows: 1. Display the circle-crosshatch screen. 2. Be sure the screen does not form a trapezoid (Figure 4–21) or (Figure 4–22). M A - X 0 9 2 7 - 8 8 Figure 4–21 Screen Wider at Top M A - X 0 9 2 9 - 8 8...

  • Page 85: Trapezoid Adjustment (Trap)

    4–26 Aligning the Video Monitor 3. Adjust the TRAP control (Figure 4–23) so that the top and bottom of the screen display (on the same side) are the same distance from the bezel edge. Tra p M A - 1 0 4 8 - 8 9 . D G Figure 4–23 Trapezoid Adjustment (TRAP)

  • Page 86: Focus Adjustment Controls

    Aligning the Video Monitor 4–27 4.5.8 Focus (FOCUS1, FOCUS2, DYN PHASE, HPARAB, VPARAB) Figure 4–24 shows the locations of the focus adjustment controls on the power supply and the deflection module. V P a r a b D y n P h a s e H P a r a b F o c us 1...

  • Page 87: Circle-Crosshatch Screen

    4–28 Aligning the Video Monitor Preparation NOTE Make sure the screen is clean. A dirty screen can distort a focused display. Use a soft tissue or cloth and a non-abrasive, non-flamable glass cleaner, or use Digital’s video screen cleaner (PN VT3XX-SC). 1.
  • Page 88 Aligning the Video Monitor 4–29 Dynamic Focus Check and adjust the focus as follows: 1. Choose an intersection on the crosshatch pattern that is halfway between the center and the top right corner of the screen display (Figure 4–25). 2. Examine the intersecting lines for sharpness. 3.

  • Page 89: Changing Refresh Rates

    Changing Refresh Rates This chapter describes how to change the monitor refresh rate. 5.1 Refresh Rates of VR320 Monitors Table 5–1 lists the different VR320 models and their refresh rates. Table 5–1 Refresh Rates of Monitor Models Model Pixels x Lines...

  • Page 90: Product Variation Label

    5–2 Changing Refresh Rates 5.3 Product Variation Label After you changing the refresh rate and test the system, add the following information to the product variation label: Table 5–2 Product Variation Label Information Label Entry Information From The model designation from the original serial tag. The new model designation of the completed product.

  • Page 91: Product Variation Label

    Changing Refresh Rates 5–3 M o d e l : V R 3 2 0 S N : P r o d u c t C o n v e r s i o n F r o m : 7 0 8 A L i s t e d T o :...

  • Page 92: Alignment Screens

    Alignment Screens This appendix describes the screen patterns used to diagnose color and deflection problems, as well as to perform deflection, color checks and adjustments. A.1 Circle-Crosshatch Pattern Use the circle-crosshatch pattern (Figure A–1) for all alignment tests. Use this pattern as a reference for customers who work primarily with graphic applications.

  • Page 93: All-White Pattern

    A–2 Alignment Screens A.2 All-White Pattern Use the all-white pattern (Figure A–2) to check for the correct setting of the horizontal and vertical controls. M A - 1 2 5 4 - 8 9 . D G Figure A–2 All-White Pattern...

  • Page 94: Central Rectangle Pattern

    Alignment Screens A–3 A.3 Central Rectangle Pattern Use the red, green, and blue central rectangle pattern (Figure A–3) when performing the gain adjustments. M A - X 0 9 2 8 - 8 8 Figure A–3 Central Rectangle Pattern...

  • Page 95: All Es Pattern

    A–4 Alignment Screens A.4 All Es Pattern Use the screen of Es (Figure A–4) as a secondary reference for customers who work primarily with text. E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E...

  • Page 96: Color Bars I Pattern

    Alignment Screens A–5 A.5 Color Bars I Pattern Use this 4-bar color pattern (Figure A–5) to check for the presence of all colors, and to check if the colors are in the correct order. B L U E R E D G R E E N W H I T E M A - X 0 9 3 5 - 8 8...

  • Page 97: Vr320 Color Monitor

    Installing and Using the VR320 Color Monitor EK-VR320-IN This guide provides users with the information needed to install, operate and maintain the VR320 monitor. The manual also describes all controls and indicators. VR320 Color Monitor IPB EK-VR320-IP This document provides a detailed parts breakdown of the VR320 field...
  • Page 98 Index Alignment procedure, 4–1 screens all Es, A–4 Adjustments all-white pattern, A–2 blue central rectangle pattern, cutoff (B. CUTOFF), 4–7 A–3 gain (B. GAIN), 4–7 circle-crosshatch pattern, color, 4–6, 4–7, 4–10 A–1 cutoff, 4–6, 4–7, 4–10 color bars patterns, A–5 deflection, 4–13 red, green, and blue, A–3 dynamic focus, 4–29...
  • Page 99 2 Index Es pattern, A–4 Central rectangle pattern, A–3 Circle-crosshatch pattern, 4–28, A–1 Cleaning the monitor, 4–2, 4–28 Color adjustments, 4–6, 4–7, 4–10 Field maintenance print set, B–1 problems Field replaceable units (FRUs), 3–8 see Table 2–4. Flicker, 2–10 Color bars Focus II pattern, A–5 dynamic, 4–29...
  • Page 100 Index 3 Interconnect cable Phase adjustment, 4–29 part number, 1–3 Pincushion, 4–24 removal, 3–9 Pincushioning, 4–23 Pixels, 1–2, 5–1 Poor display quality see Table 2–5. Power supply Jumpers, refresh rate part number, 1–3 deflection module, 3–13 refresh rate jumpers, 3–27 power supply, 3–27 removal, 3–18, 3–25 Print set, B–1...
  • Page 101 3–30, 3–34 Switch VLIN adjustment, 4–16 refresh rate, deflection module, VPARAB, 4–29 3–13 VPARAB adjustment, 4–27 service, 4–11 VR320 monitor Synchronization, loss of adjustments, 4–1 see Table 2–3. aligning, 4–1 alignment screens, A–1 changing refresh rates, 5–1 cleaning, 4–2, 4–28 Terminal technician tool kit, 1–2...
  • Page 102 Index 5 VR320 monitor (Cont.) removal and replacement procedures, 3–1 troubleshooting, 2–2 Width adjustments user controls, 4–8 HCEN, 4–19, 4–20 HLIN, 4–19, 4–20 HPHASE, 4–19, 4–20 WIDTH, 4–21...

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