ARMA-K100-CRM
42
7.4 MAIN FAULT DIAGNOSIS
Description of Problem
Probable Cause
Refer to Section
Power is On but
Power On LED is off.
No line voltage at the AC input.
The secondary power supply has failed.
Circuit breaker has failed
7.5.1
7.5.5
7.5.1
RF is On but
RF On Led is off.
The RF output level is below set threshold.
The attenuation setting is too high.
The amplifier is muted.
7.8.1, 7.8.2
7.8.2
7.6.4, 7.6.5
Alarm LED is on.
The RF output level is too low.
The amplifier has overheated but not shutdown
7.6.1- 7.6.3
Fault LED is on.
The amplifier has overheated & is in thermal shutdown.
The Power Amplifier has failed.
The Main Power Supply has failed.
The Controller has failed
7.7
7.10
7.5.3, 7.5.4
7.10
HIGH TEMP is displayed.
The amplifier internal temperature has exceeded 70° C.
7.7
LOW CURR is displayed.
The Power Amplifier has failed.
7.10
HIGH CURR is displayed.
The Power Amplifier has failed.
7.10
LOW VOLT is displayed.
The Power Amplifier has failed.
The Main Power Supply has failed.
The Secondary Power Supply has failed.
7.10
7.5.4
7.5.5
HIGH VOLT is displayed.
The Main Power Supply has failed.
7.5.4
The fan non-functional.
The fan has failed, see Note per 2.2.
7.10
Mute LED is on but not from
the front panel.
The Discrete Interface RF Mute line is high or the U-link is
not installed.
7.6.5
The unit cannot be controlled
from the front panel.
The unit is set for Remote operation.
5.4
7.5 POWER SYSTEM FAULT DIAGNOSIS
1. Verify AC power feed.
2. Verify power on led is on.
3. Verify fan operation.
4. Verify voltage on main power supply: +12V ± 0.5V. Refer to
Section 7.10
at page 43 for
replacement.
5. Verify voltage on secondary power supply:
P12-2 to P12-1 is +15V ± 0.5V.
P12-2 to P12-3 is -15V ± 0.5V.
P12-2 to P12-4 is +5V ± 0.15V.
Refer to
Section 7.10
at page 43 for replacement.
