Teledyne 7 RU Chassis, Operation Manual, Page: 16 / 144

16 208528 REV M Operations Manual, 7RU SSPA Chassis
2.1.1 Removable Display Face Plate
Two captive thumb screws (one on each side) secure the display face plate to the front of the
chassis. See
Figure 2-2 .
To remove the display face plate, loosen the captive thumb screws by rotating them counter-
clockwise. Gently slide the assembly from its position, taking care not to damage the internal
ribbon cable or board assembly.
When the display face plate is removed, a pressure trigger will disengage and disable the
SSPA. This function does NOT remove power from the unit. If performing maintenance to the
internal components of the unit, completely remove AC power to the unit’s power supply to
assure no DC voltages are present.
2.1.1.1 Fault Indicator LEDs
The SSPA has five (5) fault indicator LEDs on the left side of the front panel which illuminate
RED when a fault condition exists for the following states: Summary, Voltage, Temperature,
Current and Power Supply.
2.1.1.2 Online Indicator / Standby Select key
The LED beside this key will turn on when the unit is online. Pressing this key has no effect
in Standalone mode. When the SSPA is in 1:1 Redundancy Mode, pressing this key places
the amplifier in standby mode. Pressing this key on an amplifier already in standby mode has
no effect.
2.1.1.3 Vacuum Florescent Display (VFD)
The front panel 40x2 character VFD allows the user to get detailed information about the
state of the unit and provides easy customization of operation through an interactive menu
structure.
2.1.1.4 Main Menu Key
Pressing the
Main Menu key provides a shortcut to the SSPA’s operating menu structure in
the display. See Section 3.0 for an overview of the menu selections and operation.
Figure 2-2: Removable Display Face Plate