3592_Manual_Cleaning_Procedure_V1_0_4010612_01[1]

8/6/2019 3592_Manual_Cleaning_Procedure_V1_0_4010612_01[1]

1/11

01/21/04 3592 Manual Cleaning Procedure Version 1.0

3592_Manual_Cleaning_Procedure.doc Page 1 of 11

Abstract: This document describes a procedure that would allow manual cleaning of the major

tape path components and sensors located within the tape drive. The document is divided intothree parts:

1. A procedure for preparing the drive for cleaning which includes removal from theexisting system and disassembly of the canister and removal of covers.

2.

A procedure for cleaning the major tape path components and all the sensors.3. A procedure for installing the covers and to reassemble the drive back into the canister.Preparation of the Tape Drive for Cleaning: This section describes a procedure for removingthe drive from its canister and removing the required covers. Refer to the 3592 Tape Subsystem

Maintenance Information, part number 18P9781, guide for instructions about removing the tape

drive from the particular system it is installed in. The operator should were an electrostaticground strap throughout the following procedure.

The tools required after removal are:1. A size P1 (3/16) Phillips screwdriver.2.

A size P2 (1/4) Phillips screwdriver.

The drive should be placed on a flat surface for this procedure. Remove the four screws holdingthe fan housing as shown in the following illustrations using the size P1 Phillips screwdriver.

Remove the fan cover and disconnect the cables inside the drive canister from the drive end asshown in the illustrations below.


2/11



Remove the four screws holding the drive in the canister using the size P2 Phillips screwdriver asillustrated in the pictures below.

Remove the drive from the canister. Theillustration to the left shows the assorted parts

after removing the fan cover, unplugging all the

cables, and removing the drive.

The next step will be to remove the bezel. The

pictures below show the location of the threescrews holding the bezel. Remove the three

screws using the size P1 Phillips screwdriver.

Remove the bezel being careful to not break the attached cable. Disconnect the cable from thebezel as shown in the illustration below on the left. The next step is to remove the two covers on

the drive. First remove the six screws holding the covers using the size P1 Phillips screwdriver

as shown in both of the illustrations below.


3/11



Next, remove both covers. The large box cover overlaps the air exhaust cover. The illustration

below on the left shows the covers removed. The last step is to remove the RFI shield. Theillustration below on the right shows the two screws removed, but the cable still in place.

Remove the two screws with the size P1 Phillips screwdriver. Carefully slide the cable out from

the RFI shield as it is being removed.

The drive is now disassembled sufficiently for cleaning.


4/11



Cleaning Procedure: The following steps are suggested as a manual cleaning procedure for

3592 drives operating in oily / dusty environments over extended periods of time. The procedurewill cover the cleaning of all the major tape path components and the eleven drive sensors. The

parts should be cleaned with IBM Tape Unit Cleaner, part number 13F5647, using a Q-tip or lint

free twill cloth and then dried with compressed air that is passed through a dryer and filtered to a

10 micron level using 10 p.s.i or less. A long, thin air nozzle will provide the best access. Theoperator should wear an electrostatic ground strap throughout the procedure.

The following is a discussion of accessing these parts. The picture below labels the major partsfor later explanations. The two large gears perform the cartridge load and the tape thread

operations. Small motors and gears drive each of these two assemblies and turning these small

gears allows for manual movement of the large gears. The loader and threader sensors will beaccessed by positioning the appropriate gear opening over each sensor. Proper access to the tape

path is achieved when the threader gear is in the appropriate position.

The following sequence should be used when rotating the loader and threader gears. The loadergear must be moved first. The two pictures below show how to release the leader block latch toallow the loader to move back. Push in on the leaderblock latch release pin labeled on the

picture below and to the left by inserting your finger into the loader as shown on the picture

below on the right. Rotate the loader gear clockwise with respect to the front of the drive asshown by the arrow in the same picture and the loader gear should rotate clockwise and the

loader tray should move into the drive as indicated in the picture.


5/11



Hold the leaderblock latch release pin until the leaderblock latch has moved from the position in

the picture below on the left to the picture below on the right. The small loader gear may now berotated without holding the release block pin. When the loader tray is returned to its starting

position, the leaderblock latch release pin must be held after the tray has moved up and started

out of the drive until it is returned to its original position.

The loader gear must be rotated its full clockwise movement as shown in the picture below andto the left before the threader gear is moved. The small threader gear is rotated counter

clockwise with respect to the right side of the drive as shown by the arrow in the picture below

and to the right producing a clockwise motion of the threader gear.


6/11



Now that the sequence and direction of the small gear rotation is understood, the cleaning

procedure is explained next.

The first sensor to be cleaned is the bezel sensor. It is located on the bezel card shown in the

picture below on the left. Clean each sensor with a small amount of IBM Tape Unit Cleaner on

either a Q-tip or twill cloth. Blow dry with compressed air as defined in the beginning of thissection. Insert your finger into the loader and push the leaderblock latch release pin to clear the

Cart In sensor flag from the sensor as shown in the picture below on the right. Clean this sensor

in the same manner.

The next sensor to be cleaned is one of the two loader tray position sensors. They are locatedbetween the drive casting and the main circuit card. The four pictures below illustrate the

position of these sensors. These pictures are for reference only. The procedure does not include

removal of the bottom cover and circuit card. As the four picture sequence shows, the loader

tray position sensors are located in the front right corner of the drive, underneath the loadermotor and drive casting. The last picture below on the right shows that the front sensor is

blocked when the tray is up and in the unloaded position. Conversely, when the tray is down in

the loaded position, the back sensor is blocked. Therefore, the cleaning sequence is setup toclean each sensor when it is not blocked.


7/11



Clean the Cartridge Tray Sensor Back using only compressed air and a long, thin nozzle. Access

is from the front of the drive where the RFI cover was removed. Thered circle in the picture

below to the left shows the location of the sensor. Clean the Index sensor shown in the picture

below to the right. The reel motor flange can be moved to provide good access. The IBM TapeUnit Cleaner can be applied with a Q-tip or twill cloth. Blow the sensor dry with compressed air.

Rotate the loader gear to the position shown in the picture below to the left using the procedure

defined in the beginning of this section. Remember to push the leaderblock latch release pin

before moving the loader and to rotate the small loader gear clockwise with respect to the frontof the drive. Clean the sensor using the IBM Tape Unit Cleaner applied with a Q-tip or twill

cloth. Blow the sensor dry with compressed air. Rotate the loader gear to the position shown in

the picture below on the right. Clean this sensor in the same manner.


8/11



Clean the Cartridge Tray Sensor Front using only compressed air and a long, thin nozzle. Access

is from the front of the drive where the RFI cover was removed. Thered circle in the picture

below to the left shows the location of the sensor. Move the File Protect sensor flag with yourfinger and clean the File Protect sensor shown in the picture below to the right. The IBM Tape

Unit Cleaner can be applied with a Q-tip or twill cloth. Blow the sensor dry with compressed air.

The last three sensors to be cleaned are the threader sensors. Rotate the small threader gear

counter clockwise as defined earlier in this section to the position shown in the picture below and

to the left. Clean the two sensors using the IBM Tape Unit Cleaner applied with a Q-tip or twillcloth. Blow the sensors dry with compressed air. Rotate the threader gear to the position shown

in the picture below on the right. Clean this one sensor in the same manner.


9/11



After the sensors have been cleaned, continue torotate the small threader gear counter clockwise

until the position in the picture to the left is

achieved. The leaderblock has now been

moved past all the tape path rollers to theextreme left and the head brush is in the fully

retracted position as shown in the picture

below. The picture below shows all the majortape path parts, the four rollers, the two

outriggers, and the head.

The rollers can be cleaned with IBM Tape Unit Cleaner applied to a twill cloth. The rollers can

be rotated by hand in order to gain access to the whole surface. Blow the entire roller surface dry

with compressed air. The outriggers and head can be cleaned with IBM Tape Unit Cleanerapplied to a Q-tip and using a vertical wiping motion. Horizontal motions should be avoided.Again, dry the outriggers and head with compressed air. Insure the rollers, outriggers, and head

are lint free by close inspection.

The cleaning procedure is now complete. The next section describes how to reassemble the

drive.


10/11



Reassembly Procedure: The following section describes how to reassemble the drive for

preparation of reinstalling back into its original subsystem. The operator should were anelectrostatic ground strap throughout the procedure.

The first step is to return the threader and loader gears back to their initial positions. The

threader gear should be moved first by rotating the small threader gear clockwise with respect tothe right side of the drive. The direction is shown in the picture below and the threader gear is

shown in its initial position.

After the threader gear is back into position, rotate the small loader gear counter clockwise withrespect to the front of the drive as shown in the picture above. When the tray has moved up and

starts toward the front of the drive, insert your finger into the loader and push the leaderblock

latch release pin. Continue to rotate the small loader gear until the large loader gear is back in itsoriginal position.

The drive is now ready to have the covers installed. Install the RFI shield by lacing the bezelcable through the shield as shown in the picture below on the left and attach with two screwsusing the size P1 Phillips screwdriver. Next, install the exhaust air cover with two screws using

the size P1 Phillips screwdriver. Install the box cover. It fits over the exhaust cover. The fit in

the front may be tight and the cover may be opened slightly to clear the drive. Install the twoscrews in the back first and then the two screws in the front using the size P1 Phillips

screwdriver.


11/11

3592_Manual_Cleaning_Procedure_V1_0_4010612_01[1]

Documents

Transcript of 3592_Manual_Cleaning_Procedure_V1_0_4010612_01[1]