This article covers the procedure to reverse the conversion of an APU102E to an APU102PGN.

Required Materials and Tools

Upgrade Parts Required

Original 486SLC card
Original USSD card
Original COM4A card (or modify COM4N board for individual interrupts)

Tools/supplies Required

Misc hand tools
Laptop computer with communication program such as ProComm, HyperTerminal, etc.
Null modem cable or modem cable with null adapter (25-pin DB male on APU-102 end)
Antistatic (ESD) wrist strap (included)
Individual antistatic bag to fit APU-102 STD Buss cards (included)

Optional

APU-102 System Operations Manual
Communications program users guide
UART Replacement document # 376-0018-00
TI UART
COM4 reversion document 376-0029-06

Upgrade Procedure

1) Put ESD wrist strap on wrist and connect to ground lug on outside bottom of APU.

2) Open the APU enclosure

3) Power down the APU

4) Remove the locking bar.

5) Remove the Pentium board and place in individual antistatic bag.

6) Reinstall the original 486SLC and USSD cards.

7) Reinstall original COM4 card or restore the COM4N card to individual IRQ configuration

8) Reinstall original IRQ cable

9) Reinstall locking bar

10) Remove ESD wrist strap.

11) Power-up the APU-102 and test.

12) Restore maintenance reporting if disabled earlier.

Comet Electronics Service technicians are available M-F, 8:00 am to 4:00 pm Central Time if you require assistance or additional documentation.

(888) 700-4214 or (816) 245-5400

OR

e-mail to support@cometind.com