Operating instructions

Extron • System 8/10 PLUS • User’s Manual
Reference
Changing the Switcher Control Software Chip
Use this procedure when it is necessary to upgrade the Main Controller software.
Before starting, verify that power has been removed from the System 8/10 PLUS
by removing the AC power cord.
_______ Use ESD protection by grounding yourself with an approved wrist strap. An
electrostatic discharge that is too small to be felt or seen is still capable of
destroying or causing intermittent damage to IC circuits.
1. Prepare the switcher by first following the procedure “Removing the System 8/10
PLUS Cover” on page B-3.
2. With the switcher placed on a clean workspace, power removed and the cover
off, locate the Software chip at U5 on the Main Controller Board. The picture
below is the right, front corner of the switcher with the cover removed.
3. Use a chip puller or
other appropriate tool
to remove the
software chip.
_ When placing the tool under the chip
to begin pulling, be careful not to
damage the circuit etches that run
under the chip.
4. Ease the chip out in
steps (see
illustrations “a” to “d”
on the left) by pulling up slightly on one end and then the other. If you try
to remove it too quickly, you may damage the chip and/or the circuit
board.
5. With the chip out of its socket, check the area for circuit board damage.
6. Examine the new software chip to be sure that all pins (“legs”) are straight and in
perfect alignment.
7. Orient the new chip with the socket with the notch to the front of the switcher, as
shown at U5 in the illustration above.
8. Carefully align each pin on the chip to its corresponding female pin socket (see
illustrations “e” and “f” on the right).
9. Using even pressure, press the chip into the socket. If
there is difficulty pressing it into the socket, see if any pins
(“legs”) are bent. If so, carefully remove the chip (Step 4),
straighten the leads and try again (Step 7).
10. On the rear panel of the System 8/10 PLUS, locate the
Address Configuration DIP switches in the lower right
corner. Set DIP switch #4 to the down position (see
illustration to the left). This will reset the switcher.
11. When the software chip is installed, apply power to the System 8/10 PLUS by
connecting the AC power cord. After power is ON for at least 15 seconds, set
DIP switch #4 to the up position. The switcher has now been reset.
12. Replace the cover on the System 8/10 PLUS (page B-3). The switcher is now
ready for normal operation.
B-8
Main Controller Upgrade