Codan NGT 2012 RF User Manual

NRI—Fault finding
284 NGT Transceiver System Technical Service Manual
Figure 10a: NGT remote interface User Connect PCB fault diagnosis chart
NRI User Connect PCB
fault diagnosis chart
Test the overvoltage/polarity
protection circuitry by
measuring TP101.
Test the +6 V standby power
supply to the CIB by measuring
the voltage between the GND
and +6 V test points.
Test the onboard +5 V supply
rail by measuring the voltage
between the ground and
+5 V test points.
Test the serial port transmitters
by measuring the voltage
of P108 pins 3, 4 and 7 and
P109 pin 14.
Continued next page...
Is the
voltage between
+10.5 and +15 V?
Power supply or overvoltage/
polarity protection may need
repair.
Is the
voltage
+6.0 V ±0.2 V?
The +6 V standby power
supply may need repair or
refer to Codan.
Is the
voltage
+5.0 V ±0.1 V?
The onboard +5 V supply
rail may need repair or
refer to Codan.
Is the
voltage
7.5 V ±1 V?
The serial port transmitters
may need repair or
refer to Codan.
Check the power supply using
the diagnosis chart or refer
to Codan.
The overvoltage/polarity
protection is adequate.
The +6 V standby power
supply is adequate.
The onboard +5 V supply
rail is adequate.
The serial port transmitters
are operating correctly.
Yes
No
Yes
No
Yes
No
Yes
No

Codan NGT 2012 RF Specifications

General

Brand	Codan
Model	NGT 2012 RF
Category	Transceiver
Language	English