Part 7 Testing And Adjusting The Units; Sequence The Units In The Chain; Lcd Display/Fan - Chamberlain SENTEX Infinity Series Installation Instructions Manual

PART 7 TESTING AND ADJUSTING THE UNITS

When connections have been completed, test the system's functionality and adjust the unit, starting with
the side tone (see page 27). 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 (Doc. No. 6001014).
First, you must sequence the units in the chain. Next, you can perform functional testing, i.e., program
the units with some 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.
A. SEQUENCE THE UNITS IN THE CHAIN
Performing this step causes each unit to identify its position in the chain, determines how many units
there are in the chain, and records each individual unit's number and serial number. These instructions
are explained fully in the Programming Infinity Systems with Multi-Link Firmware (Doc. No. 6001014).
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 area "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.
B. 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 (see Figure 3 or Figure 4). 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 midsized 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
Rev C
IMPORTANT NOTE:
O
F, and so may not operate even when plugged in.
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