Sun StorageTek SL8500 Modular Library System
 

PLA-Support>Sun Systems>TAPE>Tape Hardware>SN-TP: SL3000-8500 Library
 

Applies to:

Goal

Instructions to Check and Adjust CAP Assembly for Intermittent Locking Problems.

Solution

Back Ground:

Multiple sites have reported intermittent CAP locking problems on the SL8500. Some of the issues have been addressed by checking and adjusting the CAP per the procedures stated below.

If the CAP does not open or close completely it may be necessary to add shims behind the top and bottom mounting brackets. To determine if the CAP is opening and closing completely;

Procedure:

• With the CAP in the closed position:
• Install a piece of tape across the CAP base plate (top of the CAP) and the CAP rotating cylinder.

with the door closed and from outside of the library.

• Cut the tape at the associated interception to obtain a reference point when the CAP is completely in the closed position.

Note:

Do not add shims unless required. The second generation of cap brackets released set the CAP assembly at .060 as referenced to the front door by default without any shims and are less likely to need shims added.

If shims are required they must be installed concurrently in the top and bottom brackets.

• The 1^st   

^{Generation of CAP brackets should not need more than 5 shims per bracket so as not to exceed .100.}

• ^{The 2nd generation of CAP brackets should not use more than two shims for each bracket since the initial reference point is .060.}
• ^{Each CAP shim is .020 and the total distance between the Cap bracket and the door assembly should not exceed .100.}

^Note:

^{The CAP rotating open is sometime characterized by a slight hesitation as it is moving to the open position and is not necessarily an indication of an error.}

^{The new CAP mounting brackets: (part numbers)}

• ^{Upper PN: 313880304}
• ^{Lower PN: 313880103}

^{To check/adjust the CAP with 0.020 shims PN: 3148106xx:}

• ^{Vary the SL8500 Offline by varying the associated LSM's offline.}
• ^{Open the right front door assembly.}
• ^{Disconnect the two associated connectors to the CAP Motor/Switch assembly: J79x & J74x.}
• ^{Remove the two mounting screws for the CAP Motor assembly.}
• ^{Reach inside the vacated slot in the CAP base and rotate the gear to manually unlock the CAP if necessary.}
• ^{As you manually rotate the CAP cylinder one should feel a slight amount of drag on the CAP; note the CAP will not function properly without a slight amount of drag between the CAP the and EMI shield on the right front door assembly.}

^{** If no drag is felt loosen the top and bottom CAP bracket mounting screws and remove one CAP shim from the top and bottom bracket simultaneously.}

^{** If excessive drag is detected loosen the top and bottom CAP bracket mounting screws and add one shim behind the top and bottom brackets simultaneously.}

^{** Repeat this procedure until only a small amount of drag is felt against the CAP as it rotates from open to close. When the CAP is rotated completely to the closed position it will need to be manually unlocked as stated above.}

^Note:

^{When reinstalling the CAP Motor assembly the cap should not be in the closed/locked position. If the CAP Motor assembly is installed with the rotating cylinder in the closed/locked position the micro switch on the CAP Motor mounting plate can be damaged.}

^{** Recommend using another piece of tape to keep the CAP in the open position until the CAP Motor assembly is reinstalled.}

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