Comtech EF Data EQ90 Series - Manual (Page 54)

EQ90 Amplitude Equalizer Maintenance
Rev. 2 4–3
4.3 Replacement Procedures
The following paragraphs describe the procedures for replacing assemblies and
components in the equalizer. The following procedures assume that power has been
disconnected and the unit has been removed from it's mounting and set in a safe work
area. For parts location and spare parts information, refer to Paragraph 4.3.5.
4.3.1 Chassis Cover
Remove the chassis cover as follows:
1. Remove and retain the two screws that secure the cover to the chassis.
2. Remove the cover.
4.3.2 Equalizer Modules
Replace an equalizer module, proceed as follows:
1. Remove chassis cover (Para. 4.3.1).
2. Disconnect cable assemblies at module connectors A IN and AN OUT.
3. Remove the six screws securing the equalizer cover to the equalizer PCB.
4. Remove standoffs and replace PCB by reversing above Steps 1, 2, and 3.
4.3.3 Power Supply Assembly
Replace the power supply assembly proceed as follows:
1. Remove chassis cover (Para. 4.3.1).
2. Disconnect cable assembly from power supply connector J1 and J2.
3. Turn equalizer over and remove the four screws securing power supply assembly
to the chassis.
4. Install replacement power supply assembly by reversing above Steps 1, 2, and 3.