_ FCO TK50-I002, Intermittent load/unload problems, oper errors




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| _ _ _ _ _ _ _                           Level of Urgency         Page_1_    |
|| | | | | | | |                               +--+                  Of_3_    |
||d|i|g|i|t|a|l|           FCO                 |I |                           |
||_|_|_|_|_|_|_|                               +--+                           |
|_____________________________________________________________________________|
| FIELD  CHANGE  ORDER                         Number:    TK50-I002           |
|_____________________________________________________________________________|
| Applicability:                                                              |
|                All TK50 Tape drives below Revision E1.                      |
|       (Drive Revision is on a label attached to the rear of the drive.)     |
|_____________________________________________________________________________|
| Problem/Symptom: Intermittent load/unload problems; drive hangs due to      |
|                  operator errors; inability to recover from operator        |
|                  induced failures.                                          |
|_____________________________________________________________________________|
| Quick Check:                                                                |
|                  Installed drive is Revision E1 or above.                   |
|_____________________________________________________________________________|
| Compatibility/Prerequisite FCO: N/A               | Est. Time to Install:   |
|                                                   |         .5              |
|___________________________________________________|_________________________|
| Special Tools or Test Equipment: Field Service Tool Kit                     |
|                                                                             |
|_____________________________________________________________________________|
|                        FCO     Parts   Information                          |
|_____________________________________________________________________________|
| Order by          Quantity:        Part Number:        Description:         |
| FCO Kit#:                                                                   |
| EQ-01475-01             1                              TK50 drive           |
|                                                        (Rev E1 or higher)   |
| FA-04764-01             1                              Documentation        |
|                                                                             |
|_____________________________________________________________________________|
|EQ Kit Variation System/Option Applic:       N/A                             |
|_____________________________________________________________________________|
|                            Approvals                                        |
|_____________________________________________________________________________|
|   CSSE Engineer    |  F.S.  Product Safety    |   F.S.  Logistics           |
|   Bob Steere       |  Steve Caccia            |   Ed Duggan                 |
|____________________|__________________________|_____________________________|
|   CSSE Manager     | F.S. Microfiche Libraries|  Affected Population:       |
|   Steve Dail       |   EP-FSNVX-LB   VAX      |     26,500                  |
|____________________|   EP-FSP11-LB   PDP11    |____________________________ |
|   MicroMedia Pub.  |                          |  Initial Kitting:           |
|   Ray LeBlanc      |   VAXnotes               |     26,500                  |
|____________________|   STARS                  |____________________________ |
|   Revision:        |                          |  Hardcopy Publication:      |
|      A             |                          |     27,000                  |
|____________________|                          |_____________________________|
|  FCO Release Date  |                          |  Parts Availability:        |
|  30-JUN-87         |                          |     July 1986               |
+-----------------------------------------------------------------------------+




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     |d|i|g|i|t|a|l|              |           PAGE 2 OF 3
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   _______________________________|_________________________________________

     The minimum shippable level of the TK50 Tape Drive will be E1 as of
     July 15, 1987 from all Field Service repair locations.
     FSL repair locations will install the new receiver; new idler
     tape guide; new link mechanism; new bezel and update the drive
     module to include the new drive microcode. The FCO kit will contain
     a drive having all of these changes installed, plus a warning label
     on the handle.

         ****************************************************************
         *  The TK50 contains electrostatic discharge sensitive devices.*
         *  The use of the Velostat kit is essential when replacing     *
         *  the drive.                                                  *
         ****************************************************************

     1. Perform normal system shutdown procedures. REFER TO APPROPRIATE
        SYSTEM MANUALS FOR SYSTEM INVOLVED.

     2. Power down system.

     3. Remove covers and panels to gain access to the TK50. Remove
        power and signal cables from drive. Remove drive from mounting
        slot.

     4. Using reverse procedure, replace removed drive with drive from
        kit provided. Make sure the Revision of the drive provided is
        Revision E1 or higher. The Revision is noted on a label at
        the back of the drive.

     5. Replace all covers and panels.

     6. Observe for normal power up diagnostic completion.
        Refer to paragraph 4.4.1.7 and 4.4.1.8, page 4-12 in the TK50
        TK50 Tape Drive Subsystem Manual, # EK-0TK50-TM.

     7. Run one pass of TK50 MDM diagnostic or applicable 11 system
        Data Reliability Diagnostic before returning to customer.

     8. Complete LARS form as per attached sample. Return drive to
        Logistics in shipping container as soon as possible.

     9. The repair tag should be marked "FCO ONLY" in the comments area.

                                 NOTE:
        Local Field Service offices must insure that this FCO/drive replace-
        ment is conducted by TRAINED PERSONNEL ONLY! The installing F.E.
        should make available to customer personnel the video entitled
        "TK50 User Familiarization" during the installation of this FCO/
        updated drive. A copy of this video will be shipped to each Field
        Support Manager prior to July 1, 1987. It is also available from
        Ed. Services.  The order number is EY-2898E-U1-0001.










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     |d|i|g|i|t|a|l|              |             PAGE 3 OF 3
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   _______________________________|_________________________________________

                                LARS



                                USA              GIA             EUROPE

  Activity -
     Contract and Warranty      W                U               Y
     Non Contract/Non Warranty  F                F               F
  DEC Option                    TK50             TK50            TK50
  Type of Call                  M                M               M
  Action Taken                  D                D               I
  Fail Area-Module-FCO-Comments TK50-I002        TK50-I002       TK50-I002
  Material Used                 EQ-01475-01      EQ-01475-01     EQ-01475-01

\^ TK50
\\TK50
\\STEERE
\\1987
\\JUN
\\FCO_DOCS
