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Reference Material, cont’d
System 7SC • Reference MaterialA-6
RS-232
P
R
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J
C
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T
R
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RELAY 1
IR TRANSPORT
RELAY 2
1
2
D
IS
P
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A
Y
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W
R
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N
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IR
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H/HV
V
INPUTS
A
U
D
IO
IN
SCP/AAP CONTROL
OUTPUTS
RGB
Anaheim, CA
100
-
240
5
0
/
6
0
H
z
1
.
3
A
M
A
X
.
1
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R
1
LR
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1
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D
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D
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6
7
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A
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CD
E
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F
IX
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D
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IA
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AB
CDE
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ED
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B
A
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R-Y
G/Y
VID
H/HV
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B/C
B-Y
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R-Y
G/Y
VID
H/HV
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B/C
B-Y
R
R-Y
G/Y
VID
H/HV
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B/C
B-Y
R
R-Y
G/Y
VID
H/HV
V
B/C
B-Y
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R-Y
G/Y
VID
H/HV
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B-Y
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R-Y
G/Y
VID
H/HV
V
B/C
B-Y
234
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Align Notches
Firmware Upgrade Installation
In some cases the System 7SC’s firmware may require replacement with an
updated version. The user-replaceable firmware chip is U70, the main microcon-
troller. We recommend that you send the unit in to Extron for service and updates.
Changes to firmware must be performed by authorized service personnel
only. Some System 7SC firmware updates must be performed at the
Extron factory.
Follow these steps to replace firmware in the System 7SC.
1. Disconnect the AC power cord from the System 7SC to remove power from
the unit.
To prevent electric shock, always unplug the System 7SC switcher from
the AC power source before opening the enclosure.
2. Remove the switcher from the rack, wall or furniture.
3. Remove the cover of the switcher (the top half of the enclosure) by removing
the screws, then lifting the cover straight up. The fan is connected to the side
of the cover. Do not disconnect the fan; set the cover down on the side that
has the attached fan.
Do not touch any switches or other electronic components inside the
switcher. Doing so could damage the
switcher. Electrostatic discharge (ESD)
can damage IC chips even though you
cannot feel it. You must be electrically
grounded before proceeding with
firmware replacement. A grounding
wrist strap is recommended.
4. Locate chip U70 on the circuit board, as
shown in the following
illustration.
Locating the firmware IC
chip, and aligning the PLCC chip
puller tool with firmware chip slots