Troubleshooting Procedures; General Troubleshooting Information; Troubleshooting Chart - Simplex 4100 Installation Manual

4100/4120 INSTALLATION MANUAL
A.

General Troubleshooting Information

Before troubleshooting the system, notify the customer and monitoring facility that you are repairing the system
and may trip an alarm. Local codes may require notification of additional personnel, therefore check local codes
for these requirements.
Tools required are a multimeter, side cutting pliers, IC removal/insertion tool (optional) and two sizes of
screwdriver to accomplish these procedures. It is also recommended that Field Wiring Diagrams be used as
required.
B.

Troubleshooting Chart

The "Voltage Chart" shown on the following page contains voltage readings for various motherboard terminals
and connectors and is to be used as required. Do not take voltage readings on the system printed circuit board
IC's.
When troubleshooting the 4100 system, check the obvious things first. These are the LEDs, toggle switches, dip
switch settings, power, clipped jumpers, resistors, city jumpers and wiring to include contractor installed field
wiring, all of which are located in the fire alarm panel. Perform a visual inspection of the panel.
The following indications should be observed on the fire alarm panel.
(i) Normal LED indications.
(a) Green "Power" LED is illuminated.
(b) All other LEDs are OFF.
Note: If the green power LED is not illuminated, check the AC input voltage.
(ii) Toggle switches are in the down (normal) position.
(iii) Fuses are good and are the correct values.
(iv) Ensure dip switches are properly set.
(v) Field wiring is correct (see Field Wiring Diagrams).
(vi) Correct jumpers and resistors are clipped.
(vii) Ribbon cables are properly installed.
If the alphanumeric display shows an abnormal indication on a module, troubleshoot that circuit/printed circuit
board first. Check the return field wiring to that printed circuit board to ensure proper voltage and signals are
present. If these signals and voltages are incorrect, the printed circuit board is probably defective.
If the visual inspection of the panel was normal, and the voltages are correct, the next step in sectionalisation is
to test the return field wires from the peripheral devices. This is the next section to troubleshoot because proper
voltage terminals are accessible which allows these checks to be made quickly. Check for incorrect voltage or
signal with voltmeter. If an incorrect reading is observed, you know the defective printed circuit board is the one
you are testing.
Document No: 4100-M002
APPENDIX A

TROUBLESHOOTING PROCEDURES

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