MAINTENANCE

The JSIIDS should be inspected on a monthly basis as part of your shop's recurring maintenance program. Always inform the reaction force or law enforcement desk before you begin. The system is vulnerable to compromise during maintenance, and for this reason, personnel of the alarm crew should request a security person to accompany them for their own protection. You should alter the schedule of your inspections with a different routine each month.

General maintenance of the JSIIDS includes a visual inspection of all equipment, conduits, and boxes. Look for signs of tampering and loose straps or screws, and observe the general condition of flexible cords or conduits.

Perform an operation test on all installed sensors, check the power supply for proper voltages, and check the condition of the battery. Return all functions of the system to normal operation, and call the law enforcement desk before leaving.

Maintenance procedures for the control unit and each sensor component are listed in the manufacturers' literature.

TROUBLESHOOTING

The JSIIDS was designed for fast, easy troubleshooting. Inside the control unit is a component called the status processor.

Mounted inside the processor are printed circuit boards (PCBs). There is one PCB for the duress switches and one for each group of additional sensors. This means that the group of motion sensors terminate to one PCB, the door contacts to another PCB, and so on. LEDs are installed in the last PCB. An LED looks like a small red lamp that illuminates when the processor receives the initial alarm input. The LED will remain illuminated until the system is reset.

When you open the control unit door, you can see immediately what sensor group triggered an alarm by checking for an illuminated LED.

Each PCB has test points for a voltmeter. The status of each sensor group can be checked at these test points for a tamper or alarm condition.

An alarm condition will give a 20-volt dc reading. When the problem is cleared and the system is reset, the voltage should drop off to zero.

Most system malfunctions and troubles will come from a faulty power supply. The JSIIDS requires a constant 20 volts + or - 1 volt to operate. When the power supply starts breaking down, the voltage will start creeping up or down. A voltage reading of less than 19 volts dc or more than 21 volts dc requires the replacement of the power supply.

REPAIR

The major JSIIDS components are designed in modules. Repairs to the system are normally made by replacing the defective module. An example is the power supply. It can be replaced after disconnecting and tagging all conductors and removing four screws. The status processor can also be replaced by removing four screws, or a single PCB in the processor can be replaced by a snap-and-pull action. The new PCB is then inserted into the processor.

Minor repairs on some components can be completed with the aid of a soldering gun. These components are toggle switches, fuse holders, the mode switch, and so on.

Your main concern is to repair the system as soon as possible and bring it back on line. The defective components can then be shipped back to the manufacturer for replacement.

The main point to remember when replacing JSIIDS components is to TAG YOUR CONDUC-TORS. One conductor out of place can cause you hours of downtime troubleshooting.