Exabyte EXB-8200 Maintenance Manual
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Exabyte EXB-8200 Maintenance Manual

8 mm cartridge tape subsystem
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  • Page 1 (;% PP &DUWULGJH 7DSH 6XEV\VWHP 0DLQWHQDQFH 0DQXDO 510003-001...
  • Page 2 Further, EXABYTE Corporation reserves the right to revise this publication and to make changes in it from time to time without obligation of EXABYTE Corporation to notify any person or organization of such revision or changes.
  • Page 3 Revision History Revision No. Date Revision Information January 1989 Preliminary version. May 1990 Initial release. May 1990...
  • Page 4 510003-001...

  • Page 5: Table Of Contents

    1.5.4 Supplies ........6 1.6 EXB-8200 Unit Test ....... 6 1.6.1 Preparation .
  • Page 6 6.3 Replace Card Retainers ......25 6.4 Reassemble the EXB-8200 ......25 7 Deck Hanger Removal and Replacement .
  • Page 7 17.3 Required Tools ........75 17.4 Disconnect the EXB-8200 ......75...
  • Page 8 17.5 Preparation of the EXB-8200 ......75 17.6 Cartridge Preparation ......75 17.7 Erase Head Bracket Removal .
  • Page 9 Figure 2-6 Location of the Unload Button ......12 Figure 3-1 Location of DIP R-Packs on Rear of EXB-8200 ....14 Figure 3-2 Location of SIP R-Packs on Rear of EXB-8200 .
  • Page 10 Figure 17-1 Data Cartridge with Door Taped Open ....74 Figure 17-2 EXB-8200 with Tape Loaded ......76 Figure 17-3 EXB-8200 with Tape Loaded .

  • Page 11: General Information

    Subsystem (EXB-8200). 1.1 About This Manual This manual contains 18 sections. Section 1 provides general information that you need to know before you begin testing or repairing the EXB-8200, includ- ing information about the following: Static protection requirements The test and repair environment...

  • Page 12: Revisions

    EXPERT User’s Guide for the EXB-8200 8mm Cartridge Tape Subsystem, 510010. The following books are also useful in understanding the EXB-8200, and it is recommended that they be kept with this manual: EXB-8200 8mm Cartridge Tape Subsystem Theory of Operations, 510007 EXB-8200 8mm Cartridge Tape Subsystem Illustrated Parts Catalog, 510000.

  • Page 13: Test And Repair Environment

    1 General Information 1.3 Test and Repair Environment The environment for testing or repairing the EXB-8200 consists of the follow- ing: A work area set up with static protection as described in Section 1.2 of this manual. A power supply that conforms to the requirements of the EXB-8200 8mm Cartridge Tape Subsystem Product Specification for each EXB-8200 un- der test.

  • Page 14: Required Test Tapes

    1 General Information 1.4 Required Test Tapes This section describes the tapes that are required to test the EXB-8200 and the methods to be followed in creating them. Label these tapes appropriately for easy identification. Test tape Read Interchange test tape Write Interchange test tape EXABYTE Head Sync Tapes (180223), where applicable.

  • Page 15: Required Tools And Test Equipment

    This section describes the tools and test equipment required to test and repair the EXB-8200. 1.5.1 Tools The following tools are necessary to work on the EXB-8200: T8 - TORX® screwdriver T10 - TORX screwdriver Torque measuring screwdriver (1.0 to 5.0 inch-pounds)

  • Page 16: Software

    EXB-8200 while doing specific types of operations. See the EXPERT User’s Guide for details. Each EXB-8200 under test should use a known good power supply to verify operation and to eliminate any outside influences on the test. Verify that all...
  • Page 17 Test tapes should be closely monitored to ensure that any failures reported by EXPERT are EXB-8200 related rather than tape related. In the event of a me- dia error, rerun the test with a known good tape to verify the failure.

  • Page 18: Figure 2-1 Connector And Switch Locations For The Db Card

    Figure 2-1 Connector and Switch Locations for the DB Card (single-ended SCSI) Figure 2-2 Location of DIP Switches and Remote Connector on DS Card (implemented for embed 3) 510003-001...

  • Page 19: Adding And Removing An Exb-8200 In The Test And Repair Environment

    EXB-8200 as shown in Figure 2-1. Depending on the ver- sion of the DB or DS card you have, the back of the EXB-8200 may look slightly different; however, the SCSI ID switches are in the same loca- tion.

  • Page 20: Figure 2-3 Scsi Id Dip Switch Settings For The Db And Ds Cards

    2 Adding and Removing an EXB-8200 in the Test and Repair Environment Figure 2-5 SCSI ID DIP Switch Settings for the DB and DS Cards Figure 2-3 SCSI ID Jumper Connections for the DR Card Figure 2-4 SCSI ID Jumper Connections for the DS Card...

  • Page 21: Table 2-1 Pin Assignments On The Remote Connector

    2 Adding and Removing an EXB-8200 in the Test and Repair Environment 4. Using the appropriate method for your configuration, set the SCSI ID to the proper address for the available position in the EXPERT display. Figure 2-3 shows the ID settings for the DIP switches on the DB or DS card.

  • Page 22: Figure 2-6 Location Of The Unload Button

    2 Adding and Removing an EXB-8200 in the Test and Repair Environment Figure 2-6 Location of the Unload Button 510003-001...

  • Page 23: Removing An Exb-8200 From The Test Environment

    6. Connect the EXB-8200 to the power supply. 7. Turn on the power supply. Note: Do not apply power to an EXB-8200 with the SCSI bus connected, or a SCSI bus reset or error condition may result. 8. Connect the EXB-8200 to the SCSI bus cable.

  • Page 24: Figure 3-1 Location Of Dip R-Packs On Rear Of Exb-8200

    Figure 3-1 Location of DIP R-Packs on Rear of EXB-8200 (single-ended SCSI) 510003-001...

  • Page 25: Pack Removal And Replacement

    3.1 R-Pack Configurations As shown in Figures 3-1 and 3-2, there are two different R-pack configura- tions for the single-ended SCSI version of the EXB-8200. One configuration uses two dual in-line package (DIP) socket-mounted R-packs, and the other uses three single in-line package (SIP) socket-mounted R-packs. The differen- tial version of the EXB-8200 does not use internal R-packs.

  • Page 26: Figure 3-2 Location Of Sip R-Packs On Rear Of Exb-8200

    3 R-Pack Removal and Replacement Figure 3-2 Location of SIP R-Packs on Rear of EXB-8200 (single-ended SCSI) 510003-001...

  • Page 27: Sip Mounted R-Pack Removal

    3 R-Pack Removal and Replacement 5. If any of the pins are bent, remove the R-pack. Then, straighten the pins and reinsert the R-pack. Follow the previous steps to remove, insert, and inspect the R-pack. Note: Do not use the R-pack if any of the pins are broken. 3.4 SIP Mounted R-Pack Removal Figure 3-2 shows the locations of the three SIP mounted R-packs on the DB card.

  • Page 28: Figure 4-1 Location Of Screws In Top Cover

    Figure 4-1 Location of Screws in Top Cover 510003-001...

  • Page 29: Top Cover Removal And Replacement

    T8 TORX screwdriver, and the remaining three screws use a T10 TORX screwdriver. 2. Gently lift the cover at the rear of the EXB-8200 so that the tabs located at the rear and on each side of the top cover are clear of the main housing.

  • Page 30: Figure 4-2 Location Of Screws In Top Cover (Same As Figure 4-1)

    4 Top Cover Removal and Replacement Figure 4-2 Location of Screws in Top Cover (same as Figure 4-1) 510003-001...

  • Page 31: Top Cover Replacement

    EXB-8200. The rear of the cover should be held up slightly. 2. Slide the cover toward the front of the EXB-8200 so that the flat tabs are inserted into the corresponding slots on the faceplate.

  • Page 32: Figure 5-1 Location Of Screws In The Sv Card Cover

    Figure 5-1 Location of Screws in the SV Card Cover 510003-001...

  • Page 33: Sv Card Cover Removal And Replacement

    5.1 SV Card Cover Removal To remove the SV card cover, follow these steps: 1. Turn the EXB-8200 upside down so that the SV card cover is facing up. 2. Use a T8 TORX screwdriver to remove the six screws that hold the SV card cover to the main housing.

  • Page 34: Figure 6-1 Location Of Card Retainers (Deck Hanger Not Shown)

    Figure 6-1 Location of Card Retainers (deck hanger not shown) 510003-001...

  • Page 35: Card Retainer Removal And Replacement

    EXB-8200. If the cards are aligned squarely in the EXB-8200, the card retainers will slide on with little or no force.

  • Page 36: Figure 7-1 Location Of Deck Hanger

    Figure 7-1 Location of Deck Hanger 510003-001...

  • Page 37: Deck Hanger Removal And Replacement

    Figure 7-1 The locking tabs protrude through the deck hanger from the rear of the EXB-8200. 2. Press both tabs toward the rear of the EXB-8200 while pulling up on the deck hanger. These tabs may be released simultaneously or one at a time.

  • Page 38: Reassemble The Exb-8200

    7 Deck Hanger Removal and Replacement 7.4 Reassemble the EXB-8200 To reassemble the EXB-8200, replace these parts in the following order: Card retainers Section 6 Top cover Section 4 510003-001...

  • Page 39: Edge Connector Mounted Card Removal And Replacement

    The MX card and the DB or DR card are used in the single-ended SCSI ver- sion of the EXB-8200, while the MX card and the DS card are used in the dif- ferential SCSI version of the EXB-8200. The DB card has DIP switches for setting the SCSI ID;...

  • Page 40: Figure 8-1 Location Of Edge Connector Mounted Cards

    8 Edge Connector Mounted Card Removal and Replacement Figure 8-1 Location of Edge Connector Mounted Cards (deck hanger and card retainers not shown) 510003-001...

  • Page 41: Proper Handling Of Printed Circuit Cards

    8 Edge Connector Mounted Card Removal and Replacement 8.3 Proper Handling of Printed Circuit Cards When removing or inserting a card, hold the card on the PCB surface. Do not hold the components or connectors mounted on the card. Holding the compo- nents or connectors can damage the card.

  • Page 42: Figure 8-2 Location Of Rw Card Wire Harness Connections

    8 Edge Connector Mounted Card Removal and Replacement Figure 8-2 Location of RW Card Wire Harness Connections (deck hanger and card retainers not shown) 510003-001...

  • Page 43: Rw Card Connections

    The RW card, shown in Figure 8-2, is slightly different from the other edge connector mounted cards. It has two wire harnesses connected to it, and it is the only card with the component side facing the front of the EXB-8200. To remove the RW card connections, follow these steps: 1.

  • Page 44: Figure 9-1 Location Of Sv Card Mounting Screws

    Figure 9-1 Location of SV Card Mounting Screws (SV card cover removed) 510003-001...

  • Page 45: Sv Card Removal And Replacement

    RW) are inserted. The SV card performs the functions of a mother board and contains the deck control circuitry. The SV card is mounted on the bot- tom of the EXB-8200. Before removing the SV card, remove these parts in the following order:...

  • Page 46: Figure 9-2 Location Of Sv Card Connectors

    9 SV Card Removal and Replacement Figure 9-2 Location of SV Card Connectors 510003-001...

  • Page 47: Disconnect Sv Card Connectors

    To disconnect the SV card connectors, follow these steps: 1. Turn the EXB-8200 so that it is resting on its side with the bottom facing toward you and the front facing to your left. 2. Pull the SV card away from the main housing so that you can access the connectors.

  • Page 48: Figure 9-3 Connector Key Sockets

    9 SV Card Removal and Replacement Figure 9-3 Connector Key Sockets 510003-001...
  • Page 49 See Figure 9-3. 4. Turn the EXB-8200 so that it is resting on its back with the front facing 5. Pull the SV card away from the main housing and disconnect the plugs along the front edge of the card.

  • Page 50: Reconnect The Sv Card Connections

    SV card connections in reverse order. The connections are easiest to re- connect if you start at the rear of the EXB-8200 and work around to the front. Then, work across the front and back toward the rear, ending with the rear connector on the right-hand side.

  • Page 51: Reassemble The Exb-8200

    9 SV Card Removal and Replacement 9.7 Reassemble the EXB-8200 To reassemble the EXB-8200, replace these parts in the following order: SV card cover Section 5 RW card Section 8 CD card Section 8 DF card Section 8 MX card...

  • Page 52: Figure 10-1 Location Of Edge Connector Mounted Cards

    Figure 10-1 Location of Edge Connector Mounted Cards (deck hanger and card retainers not shown) 510003-001...

  • Page 53: Mx Eprom Removal And Replacement

    10 MX EPROM Removal and Replacement 10 MX EPROM Removal and Replacement This section describes how to remove and replace the EPROM on the MX card. Figure 10-1 shows the location of the MX card. Note: This manual uses the term MX to refer to the MX card and to the MV and MS cards, which are now obsolete.

  • Page 54: Figure 10-2 Location Of Eprom For Mx, Ms, Or Mv Cards

    10 MX EPROM Removal and Replacement Figure 10-2 Location of EPROM for MX, MS, or MV Cards Figure 10-3 Location of EPROM for MX and MS Cards 510003-001...

  • Page 55: Eprom Removal

    10 MX EPROM Removal and Replacement To determine the type of EPROM you need, follow these steps: 1. Determine the card type by looking on the non-component side of the card. Near the top edge of the card are two stickers: one is a serial number sticker and the other is a revision level sticker.

  • Page 56: Figure 10-4 Location Of Eprom For Mx, Ms, Or Mv Cards (Same As Figure 10-2)

    10 MX EPROM Removal and Replacement Figure 10-4 Location of EPROM for MX, MS, or MV Cards (same as Figure 10-2) Figure 10-5 Location of EPROM for MX and MS Cards (same as Figure 10-3) 510003-001...

  • Page 57: Eprom Installation

    10 MX EPROM Removal and Replacement 10.4 EPROM Installation CAUTION Be sure to install the correct EPROM on the card. Before installing the EPROM, see Section 10.2 for information about identifying EPROMs and cards correctly. To install the EPROM if an EPROM insertion tool is available, follow these steps: 1.

  • Page 58: Figure 10-6 Location Of Edge Connector Mounted Cards

    10 MX EPROM Removal and Replacement Figure 10-6 Location of Edge Connector Mounted Cards (deck hanger and card retainers not shown) 510003-001...

  • Page 59: Reassemble The Exb-8200

    10 MX EPROM Removal and Replacement 10.5 Reassemble the EXB-8200 To reassemble the EXB-8200, replace these parts in the following order: MX card Section 8 Card retainers Section 6 Top cover Section 4 May 1990...

  • Page 60: Figure 11-1 Location Of Sv Card Eprom For Sv Card 721103-Bxx

    Figure 11-1 Location of SV Card EPROM for SV Card 721103-Bxx 510003-001...

  • Page 61: Sv Card Eprom Removal And Replacement

    11.3 EPROM Removal for SV Card 721103-Bxx To remove the EPROM, follow these steps: 1. Place the EXB-8200 on the work surface with the front facing you. Lo- cate the EPROM (see Figure 11-1). 2. Remove the EPROM using an appropriate EPROM removal tool.

  • Page 62: Figure 11-2 Location Of Sv Card Eprom For Sv Card 721102-Bxx

    11 SV Card EPROM Removal and Replacement Figure 11-2 Location of SV Card EPROM for SV Card 721102-Bxx 510003-001...

  • Page 63: Preparation For Sv Card 721102-Bxx

    11 SV Card EPROM Removal and Replacement 11.4 Preparation for SV Card 721102-Bxx To access the EPROM on the 721102-Bxx SV card, remove all of the items mentioned in Section 11.2. Then, remove these parts in the following order: SV card cover Section 4 SV card Section 8...

  • Page 64: Figure 11-3 Location Of Sv Card Eprom For Sv Card 721102-Bxx

    11 SV Card EPROM Removal and Replacement Figure 11-3 Location of SV Card EPROM for SV Card 721102-Bxx (same as Figure 11-2) 510003-001...

  • Page 65: Reassemble The Exb-8200

    EPROM. Note: Do not use the EPROM if any of the pins are broken. 11.7 Reassemble the EXB-8200 To reassemble the EXB-8200, replace these parts in the following order: SV card (for part number 721102-Bxx) Section 9...

  • Page 66: Figure 12-1 Location Of Door Release Lever

    Figure 12-1 Location of Door Release Lever Figure 12-2 Location of Faceplate Mounting Screws 510003-001...

  • Page 67: Faceplate Removal And Replacement

    Figure 12-2 shows the loca- tion of these screws. 4. Position the EXB-8200 so that it is resting on the rear of the main hous- ing, with the front pointing up and the door open.

  • Page 68: Figure 12-3 Location Of Faceplate Mounting Screws (Same As Figure 12-2)

    12 Faceplate Removal and Replacement Figure 12-3 Location of Faceplate Mounting Screws (same as Figure 12-2) 510003-001...

  • Page 69: Faceplate Replacement

    12.2 Faceplate Replacement To replace the faceplate, follow these steps: 1. Position the EXB-8200 on the work surface so that it is resting on the rear of the main housing with the door open and facing up. 2. Close the door partially so that you can slide the faceplate around the door and align it with the four mounting screws (see Figure 12-3).

  • Page 70: Figure 13-1 Location Of Door Release Lever

    Figure 13-1 Location of Door Release Lever Figure 13-2 Door and Door Retainer Separation 510003-001...

  • Page 71: Door Removal And Replacement

    This section describes how to remove and replace the door. 13.1 Preparation If necessary, open the door of the EXB-8200 after checking that there is no data cartridge in the EXB-8200. To open the door, use an appropriate tool, such as a small screwdriver, to move the door release lever toward the front of the EXB-8200.

  • Page 72: Figure 13-3 Relationship Among The Door, Door Retainer, And Door Bracket

    13 Door Removal and Replacement Figure 13-3 Relationship among the Door, Door Retainer, and Door Bracket 510003-001...

  • Page 73: Door Replacement

    View A in Figure 13-3 shows how the door, the door retainer, and the door bracket are positioned on the EXB-8200. View B shows a side view of the door, the door bracket, and the door retainer.

  • Page 74: Figure 14-1 Location Of Deck Mounting Screws

    Figure 14-1 Location of Deck Mounting Screws 510003-001...

  • Page 75: Deck Assembly Removal And Replacement

    To remove the deck, follow these steps: 1. Remove the four Phillips screws that mount the deck to the main hous- ing, as shown in Figure 14-1. 2. Move the deck out the front of the EXB-8200 and away from the main housing. May 1990...

  • Page 76: Figure 14-2 Location Of Deck Mounting Screws (Same As Figure 14-1)

    14 Deck Assembly Removal and Replacement Figure 14-2 Location of Deck Mounting Screws (same as Figure 14-1) 510003-001...

  • Page 77: Deck Replacement

    To replace the deck, follow these steps: 1. Set the new deck in place and start the four mounting screws to hold the deck in place while reassembling the EXB-8200. Do not tighten these screws at this time. 2. Mount the door assembly from the old deck on the new deck (see Sec- tion 13).

  • Page 78: Figure 15-1 Main Housing Removal

    Figure 15-1 Main Housing Removal 510003-001...

  • Page 79: Main Housing Removal And Replacement

    1. Grasp the main housing by the sides toward the front. 2. Spread the sides of the main housing apart. 3. Push the main housing away from the rest of the EXB-8200 until it is completely separate from the deck and cards, as shown in Figure 15-1.

  • Page 80: Main Housing Replacement

    The screws for the SV card cover should go through the SV card cover and SV card before they go into the main housing. 15.4 Reassemble the EXB-8200 To reassemble the EXB-8200, replace these parts in the following order: Deck assembly Section 14 SV card...

  • Page 81: Cleaning Procedure

    B016. Inserting a cleaning tape into EXB-8200s below these firm- ware levels causes the EXB-8200 to identify the cleaning tape as a data tape. If this occurs, the EXB-8200 will load the cleaning tape and show Ready status (green LED lit).

  • Page 82: Cleaning Action Performed By Cartridge

    16 Cleaning Procedure 16.4 Cleaning Action Performed by Cartridge When a cleaning cartridge is inserted into an EXB-8200 with the proper firm- ware levels, the cleaning tape is loaded into the tape path and moved forward for approximately 15 seconds. At the end of this time, the cleaning tape is drawn back into the cartridge and the cartridge is ejected.

  • Page 83: Tape Removal Procedure

    IMPORTANT EXABYTE Corporation does not assume responsibility for any dam- age to the EXB-8200, the data cartridge, or media or for the loss of any data resulting from this procedure. Any damage to the EXB-8200 caused by this procedure will be repaired as a nonwarranty repair and may void the existing warranty for the EXB-8200.

  • Page 84: Figure 17-1 Data Cartridge With Door Taped Open

    17 Tape Removal Procedure Figure 17-1 Data Cartridge with Door Taped Open 510003-001...

  • Page 85: Required Tools

    Following all procedures appropriate to the system in which the EXB-8200 is installed, disconnect the EXB-8200 from the power supply and the SCSI bus. Remove the EXB-8200 from the system and transport it to the work area. 17.5 Preparation of the EXB-8200 Remove the top cover, as described in Section 4.

  • Page 86: Figure 17-2 Exb-8200 With Tape Loaded

    17 Tape Removal Procedure Figure 17-2 EXB-8200 with Tape Loaded 510003-001...

  • Page 87: Erase Head Bracket Removal

    1. Remove the small Phillips head screw that holds the erase head bracket in place (see Figure 17-2). Note: Early models of the EXB-8200 do not have the mounting screw. In EXB-8200s without the mounting screw, go to step 2.

  • Page 88: Figure 17-3 Exb-8200 With Tape Loaded

    17 Tape Removal Procedure Figure 17-3 EXB-8200 with Tape Loaded Tape Guide and Erase Head Bracket Removed 510003-001...

  • Page 89: Tape Removal

    CAUTION EXABYTE considers this procedure to have a high potential for dam- age to the media and the heads on the EXB-8200. Use extreme cau- tion when attempting to remove the tape using this procedure. When removing the tape from the guide posts and rollers, use a nonconduc- tive tool, such as a molded potentiometer adjustment tool.

  • Page 90: Figure 17-4 Exb-8200 With Tape Loaded (Same As Figure 17-3)

    17 Tape Removal Procedure Figure 17-4 EXB-8200 with Tape Loaded Tape Guide and Erase Head Bracket Removed (same as Figure 17-3) 510003-001...

  • Page 91: Remove Faceplate And Open Door

    With the faceplate removed and the door open, you can rewind the tape. To wind the loose tape and eject the data cartridge, follow these steps: 1. Position the EXB-8200 so that it is resting on the left side of the main housing with the door facing to your left.

  • Page 92: Reassemble The Exb-8200

    9. Replace the erase head bracket. Replace the mounting screw if the bracket had one. Tighten the screw to 1.7 inch-pounds of torque. 17.12 Reassemble the EXB-8200 To reassemble the EXB-8200, replace these parts in the following order: Faceplate Section 12...

  • Page 93: Head Sync Adjustment Procedure

    18 Head Sync Adjustment Procedure 18 Head Sync Adjustment Procedure This section describes how to adjust the head sync timing on an EXB-8200 to ensure interchangeability of data. The head sync timing needs to be adjusted whenever an SV card or a deck is replaced. The head sync adjustment proce- dure entails checking the head sync timing, adjusting it if necessary, and veri- fying the adjustment.

  • Page 94: Figure 18-1 Oscilloscope Connections For The Head Sync Timing Procedure

    18 Head Sync Adjustment Procedure Figure 18-1 Oscilloscope Connections for the Head Sync Timing Procedure (deck hanger not shown) 510003-001...

  • Page 95: Software And User's Manuals

    Monitor cable properly connected to the serial port on the computer system Two-channel oscilloscope (50 Mhz with time delay capability) with a hood Known good EXB-8200 Read Interchange test tape, written with a known good EXB-8200 (see Section 1.4) Blank EXATAPE 8mm data cartridge.

  • Page 96: Figure 18-2 Waveforms

    18 Head Sync Adjustment Procedure Figure 18-2 Waveforms 510003-001...

  • Page 97: Scope Settings

    1. Turn on power to the EXB-8200. Wait for the EXB-8200 to complete the power-on self-test. 2. Press the unload button on the EXB-8200 and wait for the door to open. 3. Ensure that the head sync tape is write protected. If the red write protect switch is visible, the tape is write protected.

  • Page 98: Figure 18-3 Waveforms (Same As Figure 18-2)

    18 Head Sync Adjustment Procedure Figure 18-3 Waveforms (same as Figure 18-2) 510003-001...
  • Page 99 18 Head Sync Adjustment Procedure 7. Enter M880004 to move the tape forward. Note: Other useful commands for controlling tape movement include: M880001 Load tape M880002 Unload and eject tape M880003 Space forward to LBOT M880004 Go track M880007 Rewind to physical beginning of tape (PBOT) M88000C Stop tape 8.

  • Page 100: Figure 18-4 Waveforms (Same As Figure 18-2)

    18 Head Sync Adjustment Procedure Figure 18-4 Waveforms (same as Figure 18-2) 510003-001...

  • Page 101: Adjust The Head Sync Timing

    18 Head Sync Adjustment Procedure 18.5 Adjust the Head Sync Timing The head sync adjustment potentiometer is labeled R28 on the SV card. It is just to the left of the head sync test point on the front edge of the SV card. To adjust the head sync timing, follow these steps: 1.

  • Page 102: Verify The Adjustment

    5. Unload the tape and insert a blank EXATAPE. 6. Perform a write Inter_chg test. 7. Unload the tape, insert it into the known good EXB-8200, and perform a read only Inter_chg test. 8. If the EXB-8200 passes both of the Inter_chg tests, the head sync timing adjustment is complete.
  • Page 103 SV card EPROM removal and replacement 51 - 55 EXPERT SV card removal and replacement 35 - 41 using to test EXB-8200 CD card removal and replacement 29 - 33 using to test head sync adjustment chassis See main housing...
  • Page 104 See MX card removing MV card tapes See MX card for testing EXB-8200 MX card removing from EXB-8200 manually 73 - 82 compatibility of terminators EPROM versions for See R-pack removing and replacing 29 - 33 test and repair environment...

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