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-
- READY FOR INPUT
- C1571 ROM Installation Notes
- ---------------------------
- Well, my new ROM arrived today for my (singular) 1571, and as you can well
- imagine, I wasted little time in plowing into it! The whole procedure was
- quick and painless, but here are the specifics for those who feel a bit
- queasy about the whole thing.
-
- First, most repeated, and most tiresome, removing the cover of your drive
- will automatically void the warranty. If your drive is still under
- warranty, or if you are don't feel up to this sort of procedure at all,
- please have the operation performed by an authorized CBM service center or
- someone else who will guarantee the work.
-
- Step 1:
- -------
- Turn off your drive and computer and detach the serial and power
- cables from the drive. I placed a blank disk in the drive and close the
- door, as I do whenever I move a drive about, to secure the heads.
-
- Step 2:
- -------
- Place the drive upside down on a soft workspace. You will need a
- small Phillips screwdriver, and a small non-conductive tool of some kind to
- pry the chip up with. Locate and remove the four screws holding the case
- together. Turn the drive right side up, and lift off the upper half of the
- case. It should come free very easily. Set this aside.
-
- Step 3:
- -------
- You should now see a large rectangular box covered with sheet metal at
- the rear of the drive enclosure. This is the power supply, and must be
- removed to gain access to the ROM chip. It is secured at each corner by a
- Phillips screw. Remove these and place them aside. Now you should be able
- to gently lift the power supply and stand it on its side on the drive
- mechanism itself, without detaching any of the ground wires or cables.
- This will expose the circuit board underneath.
-
- Step 4:
- -------
- As you look at the drive from directly in front, the ROM chip we are
- interested in is the second from the left at the far rear. It is slightly
- elevated above the surrounding chips. The circuit board is marked "U2" at
- one end of the chip, and "C2" at the other. Mine was also labeled with the
- part number: "310654-03". Note that there is a small notch at one end of
- the chip. This matches a similar notch on the circuit board diagram, and
- serves to tell you which way the chip goes in. Once you have identified
- the correct chip to your satisfaction, you are ready to extract it.
-
- Step 5:
- -------
- These chips CAN be zapped by static electricity, although I myself
- have never done it. You should make sure that you are at an equilibrium
- with the electrical potential of the drive before proceeding (touching the
- power supply shielding should do it). Now the tricky part. Carefully pry
- the old chip out. Gentle force should enable you to work it out without
- damage. Stick it into the other side of the conductive foam strip the new
- chip comes on, and take the new one out. Making sure that the notch is
- facing the right way, set it in place. Some of the little legs may be
- splayed out too widely to fit easily, these should be bent carefully
- inwards. Check to be sure that each leg fits easily into its socket, then
- rock the new chip down firmly into place.
-
- Step 6:
- -------
- Place the power supply back in place and screw it down. Put the cover
- back on the drive, and screw it back on. You are done! Hook up the drive,
- put in an old 64 format disk, and listen. Voila, no more chattering!
- Thanks, CBM!
-
- Kevin Stevens