Newsgroups: comp.sys.apple2 Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!math.ohio-state.edu!howland.reston.ans.net!spool.mu.edu!sgiblab!pacbell.com!att-out!cbnewsd!bird From: bird@cbnewsd.cb.att.com (j.l.walters) Subject: Re: Repairing DISK ][ Drives Organization: AT&T Date: Sat, 9 Oct 1993 01:34:25 GMT Message-ID: References: <9310080034.AA05410@plutos> Lines: 69 From article <9310080034.AA05410@plutos>, by markus@husky.uucp: >...5.25" drive doesn't work... I'm doing this from memory, so forgive me if I'm off a tad on placement, etc. 1. Remove the four screws on the bottom of the case. 2. Slide the cover off the BACK side. 3. There is a cable that plugs into the front. Remove it. I'm sure that it is polorized, but check so that you are sure you get it back correctly. 4. There are two phillips screws on the front holding a board. The rear of the board slides into some clips. 5. Use the correct size screwdriver and push down firmly as you loosen these screws. The are really set in place and if you strip the slots you are in big doo-doo. 6. Pull the board forward out of the read clips and then bend it backwards so that it is out of the way. 7. There should be a shiny metal cover clipped over some rails. Note how it is attached and remove it (pry it off with a screwdriver. It is a MUST to get this on when you reassemble. If you don't have one, reassemble now, move the drive as far away as possible from your monitor. This will probably fix it. 8. There is a round horiz plastic plate with a spiral grove. Use Q-Tips and isoprophyl alchol (don't substitute!) and clean the spiral. Spin it to get at all of it. Note that an assembly will move when you move it. This is how the head is moved *under* the correct track. Clean the two shiny rails that the head assembly moves on. Spin the plastic spiral so you can clean it all. You want the unit so clean that it will squeek when operated under program control. 9. Now the best part. Open and close the drive door and notice just what happens. a. A round split piece of domed plastic is forced into the hub part of the floppy, binding it in place. b. A plastic arm with a small plug of felt that is pushed down on the top of the disk so the head on the bottom makes contact. Carefully lift the plastic arm. It should lift to the vertical postition. Using a very small screwdriver, etc., "fuzz up" the felt. It becomes matted and becomes very hard. If it is worn off, then you need a new one and will have to come back to the net for a source. While the plastic arm is still up, use a Q-tip and Isopropyl alcohol to clean the read head. Don't drown it. Put the plastic arm down and note whether the plastic part of the felt insert is kept from turning by melted wax. If so, use a small screwdriver to break the wax seal to allow it to move. (About half of the Apple drives I've seen have the wax. It isn't a good deal since it doesn't allow the felt insert to turn and you end up wearing it out on one side.) Reverse all the above instructions to reassemble the unit. UNDER NO CIRCUMSTANCES SHOULD YOU USE ANY KIND OF LUBRICANT ON THE DRIVE! Hope this helps, -- Joe Walters att!ihlpm!bird, NW 31-K14 (708) 224-7189 To know, and not to do, is not yet to know Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!newsrelay.iastate.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!agate!library.ucla.edu!csulb.edu!nic.csu.net!eis.CalState.EDU!sjensen Newsgroups: comp.sys.apple2 Subject: Re: Repairing DISK ][ Drives Message-ID: From: sjensen@eis.calstate.edu (Steve Jensen) Date: Sat, 9 Oct 1993 14:04:57 GMT References: <9310080034.AA05410@plutos> Organization: Calif State Univ/Electronic Information Services Lines: 25 Some advice on your Disk II- If the problem is just that it's coming off the cam towards the rear, just take the top off the case first. If it's a Franklin clone the 4 screws may be on the sides rather than the bottom as on a Disk II. You can see the flat grooved cam disk without removing anything else and you can see the 2 rails that read/write head slides on. Some times a very thick disk or a user bending the disk when inserting it will cause the little thing that goes in the cam groove to be pushed out of the groove to the rear. I lubricate the 2 rails with TriFlow, which leaves teflon microballoons. Don't lube with anything else. I use a spray can of squirt a little in an old spoon or something, then using a long q-tip or sponge tip applicator, put some on the rails and move the cam back and forth by hand a bit. Don't spray anything into the drive though. You may need the drive realigned or have a bad stepper motor. You might operate the drive without the cover to see if it's getting out of the groove while in operation rather than when a disk is inserted. Remember, NEVER install or disconnect any disk drive with the power on. The felt pad on the pressure arm is not supposed to rotate. My friendly Mac dealer ordered me a dozen felt pads for $3 each. You can email me if you still have problems. I can align your drive if it needs it. -- sjensen@eis.calstate.edu 8-() - _ ! Still smokin'.