Section 9 – Servicing (Continued)
102
DS18
Red
Monitors the ON command from the Transmitter.
LED will flash when an ON command is being received from the Transmitter.
While pushing the ON button on the Transmitter this should light.
DS19
Red
Monitors EMS condition.
Normally OFF.
LED will flash when an EMS command is transmitted and illuminate continuously when the EMS
condition is in effect. An EMS condition may be created when an EMS command is transmitted or
when a failure mode is detected by the slave microcomputer. If both DS18 and DS19 are
illuminated, a contact monitoring error has been detected. If both DS16 and DS19 are illuminated,
the incoming data on the ICC bus has been corrupted.
DS20
Red
Monitors the OFF command from the Transmitter.
LED will flash when an OFF command is being received from the Transmitter Unit.
While pushing the OFF button on the Transmitter this should light.
DS21
Yellow
Monitors the activity for the Security Relay (KMR1).
Normally ON
when the receiver is enabled.
If the system is ON and the light is not lit there is a serious microprocessor error.
DS22
Green
Monitors the unregulated DC power to the 12 volt regulator
Normally ON
when AC line is present.
If AC Power is present and the AC to DC converter is working then the LED is illuminated. The
LED is off if DC power is not present. Check power supply, fuses and if power is applied to the
receiver
.
DS23 Green
Monitors the regulated 12 VDC power to the Board (receiver board).
Normally ON
when AC line is present.
If 12 VDC power is present then the LED is illuminated. The LED is off if 12 VDC power is not
present. Check the 12 VDC regulator and for shorts on the Board.
DS24 Green
Monitors regulated 5 VDC power to the Board.
Normally ON
when AC line is present.
If 5 VDC power is present then the LED is illuminated. The LED is off if 5 VDC power is not
present. Check the 5 VDC regulator and for shorts on the Board.
9-2.
Receiver Testing.
9-2.1.
Receiver test points.
Test points are shown as dark circles on Figure 9-1. Receiver Layout.
TP1 – Monitors regulated 5 VDC.
TP2 – Ground for monitoring other test points.
TP3 – Monitors regulated 12 VDC.
TP4 – Not used.
