Apple II Apple IIc v4 ROM Upgrade Installation

Apple II Apple IIc v4 ROM Upgrade
Installation
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Apple ® IIc Add-On Kit
Dealer's Installation Instructions
The Apple® IIc Add-On Kit enables the Apple IIc to use the UniDiskTM 3.5.
Warning
This Apple IIc Add-On Kit must be installed by an authorized Apple
Dealer! Installation requires removal of the Apple IIc cover and
modification of the main circuit board. Installation by someone other than
an authorized Apple dealer will void the Apple IIc's warranty.
Equipment Required
To install the Apple IIc Add-On Kit, you need the following equipment:
256K ROM, Apple P/N 342-0033-A (supplied)
A fine-tip soldering iron
Rosin core solder (Do not use Acid-core solder)
An X-acto® knife or equivalent
An I.C. Extractor (Apple P/N 919-0003) or equivalent
A Phillips-head screwdriver
A clean, soft surface to work on.
Installation Procedure
Please make sure you have a clean, dry, soft surface to work on to avoid
damage to the top of the Apple IIc case.
1. Turn off the power to the Apple IIc.
2. Disconnect the power cord and connections for any attached
peripherals.
Note: For step by step instructions on removing the back panel, top cover
and keyboard, refer to your Service Program Manual, Apple IIc
Technical Procedures, Take-apart section.
Installation Procedure
1
3. Turn the computer over (upside down) on a clean, soft surface.
4. Remove the six screws accessible from the bottom side of the Apple IIc
as shown in Figure 1.
Figure L Apple IIc Bottom View
Screws
5.
6.
7.
8.
Turn the Apple IIc over (upright).
Remove the back panel.
Remove the top cover carefully.
Slide the keyboard forward from the disk drive shield, being careful of
the RFI/EMC clips. Flip the keyboard over and place it on top of the
internal disk drive.
Figure 2. Flip Keyboard onto Disk Drive
Apple IIc Add-On Kit: Dealer’s Installation Instructions
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9. Locate W1 on the main logic board and cut through the join point of
the two triangles, as shown in Figure 3.
W2
Solder point
W1
Cut here 1 mm minimum
MON
10. Locate the two triangles designated as W2 and connect them with a
soldering iron using a small drop of solder, as shown in Figure 3.
11. Locate the 28-pin I.C. designated as MON (in Figure 3) at location D19
on the printed circuit board.
12. Carefully remove the MON IC. using the I.C. extractor and replace it
with the new ROM. Make sure that pin 1 is oriented correctly by lining
up the notch on the end of the I.C. with the end of the socket with the
white dot. Make sure all pins are aligned with holes in the socket
before applying pressure.
Installation Procedure
3
13. Return the keyboard and the handle to their original positions and
replace the top cover.
14. Turn the Apple IIc over carefully (upside down).
15. Secure the top cover with the six screws removed at step 4.
16. Attach the back panel.
17. Turn the Apple IIc upright again.
18. Install the upgrade sticker on the back panel of the machine to the left
of the disk drive icon.
19. Plug the power cord into the power socket and reconnect all other
peripherals.
20. Run the Apple IIc Dealer Diagnostics, Rev. C to make sure the
computer operates correctly. Refer to your Service Program
Manual, Apple IIc Technical Procedures for detailed instructions.
21. Return Add-on Kit manuals to customer with the computer. Do not
return these instructions to the customer.
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Apple Ilc Add-On Kit: Dealer's Installation Instructions
062185.