Chamberlain Sentex INFINITY Installation Instructions Manual page 24

T E S T I N G A N D A D J U S T I N G T H E U N I T S
When connections have been completed, test the system's
functionality and adjust the unit, starting with the side tone
(page 24). The test sequence depends on the series system and
options used. Before testing the unit, be sure to read the
accompanying manual, Programming Infinity Systems with
Multi-Link Firmware.
First, you must sequence the units in the chain. Next, you can
perform functional testing ( i.e., program the units with test
codes, cards, telephone numbers, etc.), then use these entries to
test all relays, card readers and auxiliary keypads. Be sure to test
each unit in the chain. The various function tests are
described below.
SEQUENCE THE UNITS IN THE CHAIN
Performing this step causes each unit to identify its position in
the chain, determine how many units there are in the chain, and
record each individual unit's number and serial number. These
instructions are explained fully in the Programming Infinity
Systems with Multi-Link Firmware manual.
NOTE: If sequencing is done via modem, make sure only the first
unit in the chain is connected to the telephone line when you call.
Until the initial sequencing is done, each unit will respond as if it
is unit "1". Once the units are resequenced, multiple units can be
connected to the same line since only unit "1" will answer the
line.
• Select programming number "80" and press ENTER at the
prompt. The sequencing process may take a few moments.
The units, their numbers in the chain, and their serial numbers
will be displayed.
NOTE: If you encounter difficulties resequencing all units in the
chain, refer to Baud Rate for RS-232 Communication.
LCD DISPLAY/FAN
LCD DISPLAY
Observe the viewing angle and contrast, and adjust if necessary
using the "CONTRAST ADJUSTMENT" pot on the main processor
board (Figures 6 and 7). The letters are darkest when properly
adjusted. Be sure to adjust the pot in both directions to find the
maximum contrast.
1. Adjust the contrast for someone 5 feet 6 inches tall, standing 2
feet away from the Infinity. For drive-up applications, assume
that person is sitting in a mid-sized car.
2. Adjust the viewing angle so the display is visible 8 to 10
inches higher and lower.
3. Adjust display so the background is yellow (white on older
models) and the lettering is blue.
INTERNAL FANS
Fans prevent display "blotching" and uneven coloration for
installations in direct sunlight and very high temperatures (this
harmless, temporary phenomenon disappears when the
temperature drops). The fans are mounted inside the enclosure
on both sides of the display. Ensure the fans operate properly
before completing your installation.
1. Ensure that fans are plugged into the two pin headers marked
"FAN A" (J16) and "FAN B" (J17) at the top of the board
(with the red wire on the + terminal).
2. Ensure the thermistor mounted to the bracket below the
display is plugged into the two pin header at the bottom of the
board marked "TEMP SENSE" (J9).
3. Ensure there is nothing obstructing the air passage through
the bracket assembly surrounding the display.
NOTE: Fans only operate above 75-85° F.
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