= Vertical bar in the right margin indicates change or addition.
Installation Instructions
to Replace Firmware
on CPU Card in CM9502
C515M (10/98)
®
The firmware kits consists of the following parts:
1
1
1
1
1
Firmware EPROM that is labeled PRG444U20-R2.21
Firmware EPROM that is labeled PRG444U21-R2.21
Card extraction tool
3.3M ohm resistor
Installation Instructions (C515M)
To replace the EPROMs in the CPU card:
CAUTION: The pro-
gramming in the
1. Turn off power to the CM9502 card cage.
2. Remove the CPU card from the card cage with the card extraction tool. Look-
ing at the rear of the card cage, the CPU card is the second one from the right.
CM9502 will be lost
when you remove the
CPU card. Note how
your system is config-
ured before turning off
the power.
When you remove the card, handle it only by its edges. Do not touch the
goldfingers.
3. Refer to Figure 1 and remove the old EPROMs. Use the tip of a screwdriver to
pry up the ends of the EPROMs and remove them from their sockets.
4. Install the new EPROMs. Do not touch the EPROM pins. Make sure the notch
on the EPROM lines up with the notch on the socket (refer to Figure 1). Place
the EPROM pins the socket and push down on the EPROM. Make sure the
pins go into the socket and do not bend under the EPROM.
5. Find resistor R21 (refer to Figure 1). If the value of the resistor is 100K ohm
(brown, black, yellow stripes), replace it with the 3.3M ohm resistor (orange,
orange, green stripes) included in the kit. If R21 is already a 3.3M ohm resis-
tor, no modification is required.
6. Replace the CPU card in the card cage and turn on the power.
7. Reprogram the CM9502.
PRG444U21-RX.XX
SW2
SW1
BATT
PRG444U20-RX.XX
D2
R22
R21
R20
Figure 1. EPROM and Resistor Installation
In North America and Canada: Tel (800) 289-9100 • FAX (800) 289-9150
International Customers: Tel (1-559) 292-1981 or FAX (1-559) 348-1120
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