X-2 Technical Service Manual Maintenance 5-9
Publication No: 15-02047
Connectors
The ribbon cable header and multiway connectors used in locations can be
incorrectly mated with their corresponding connectors. Care must therefore
be taken when installing to ensure these connectors are correctly mated.
Removal of the screws securing the driver transistors V13
[E9]
and V14 and
bias transistor V17
[G10]
on the PA assembly requires a 1/16 inch Allen key.
5.4.2 Top and Bottom Covers
To gain access to the printed circuit boards, the top or bottom cover must be
removed from the transceiver. To remove either cover, the four screws (two
on each side) must be removed and the cover lifted.
To replace the cover, place the cover onto the transceiver and refit the
retaining screws.
5.4.3 Rx/Exciter & Control PCB
To remove the Rx/Exciter & Control PCB, disconnect the two ribbon cable
connectors P3 and P401 and the Tx/Rx coaxial connector P1. Remove the
five retaining screws and withdraw the PCB. Reverse the procedure to
install, ensuring the ribbon connectors are aligned correctly.
5.4.4 Front Panel PCB
To gain access to the front panel PCB, remove the front panel from the
frame of the Transceiver by removing the two retaining screws located on
each side of the front surround. Disconnect the 26 way ribbon connector
P401 from the Rx/Exciter & Control PCB and pull the front panel forward
clear of the frame.
To remove the PCB:
1. Remove the three control knobs (secured by nuts under removable
caps).
2. Carefully pull off the knobs on the three switches located above the
control knobs.
3. Remove the nut securing the volume control.
4. Remove the connector to the microphone socket.
5. Remove the four retaining screws and carefully withdraw the PCB.
To install the PCB:
1. Reverse the procedure detailed above.
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