Senstar Corporation 24000 User Manual

The boards containing the electronic circuitry in the transmitter/receiver unit enclosures may be tested for 
readings required for normal operation of the system. Figures 5-1 (receiver) and 5-2 (transmitter) show the 
location of the test points on the boards. These tests should be done under the following conditions:

1. 12 VDC (nominal) power applied to both transmitter and receiver units.

2. The same channel selection for both transmitter and receiver.

3. Mechanical (transmitter to receiver) alignment complete.

4. Obtain “normal indication” for each test/observation before proceeding to the next test point.

5. All measurements require a digital multi-meter (DMM) except where an oscilloscope reading is indicated.

Transmitter:

TP-9

11.6 VDC ± 0.25 (@ 12 VDC input)

1. Fuse F1 blown
2. No power to TB-1 terminals 
    1 (-) and 2 (+), (11 - 15 VDC)

Power LED (DS-1)

Illuminated

1. LED open
2. Voltage regulator U5 open

TP-5

6.0 VDC ± 0.5

Voltage regulator U11 faulty

TP-8

5 - 8 V P-P Oscilloscope reading 
(clean and symmetrical square 
wave)

1. Power amplifier faulty
2. Code generator faulty

Receiver:

TP-1

11.6 VDC ± 0.25 (@ 12 VDC input)

1. Fuse F1 blown
2. No power to TB-1 terminal 1 (-) and 2 

(+), (11 - 15 VDC)

TP-3

5.0 VDC ± 0.1

1. Regulator U15 failure
2. DS-3 Power LED open

TP-2

8.0 VDC ± 0.1

Regulator U15 failure

TP-4

2.5 VDC ± 0.1

Zener diode D9 failure

TP-10

1.7 - 7.3 VDC

1. Channel selection not correct
2. Mechanical alignment improper
3. Transmitter not operating properly
4. Receiver circuits faulty

Alarm LED (DS-2)

Non-illuminated

1. Channel selection not correct
2. Mechanical alignment improper
3. Transmitter not operating properly
4. Receiver circuits faulty

Wrong channel LED (DS-1)

Non-illuminated

1. Channel selection at Tx/Rx not identical
2. Object in path
3. Faulty transmitter
4. Faulty receiver

Table 5-1: test point readings