Power Amplifier - Removal and Installation R&S M3SR Series 4100 HF Transceivers
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5.7 Power Amplifier - Removal and Installation
5.7.1 Removal of Power Amplifier (A30)
CAUTION
Some electronic power elements of the amplifier board may have insulation made
from beryllium oxide ceramics. Such components are especially marked on the cir
-
cuit documentation. Please see the safety instructions for handling parts made from
beryllium oxide ceramics.
To remove the Power Amplifier (A30) from the R&S M3SR Series 4100 150 W HF Transceiver proceed
as follows (see also
Fig. 5.8, Fig. 5.9 and Fig. 5.10):
1. Take off top and bottom cover the R&S M3SR Series 4100 150 W HF Transceiver as described
in
5.1 - Disassembly.
2. By using a screw driver, undo and remove the four screws on the transceiver rear.
3. Disconnect RF cables W55 and W64 from RF connectors X55 and X54 of Radio Controller (A60)
and pull the cables out under the transceiver.
4. Disconnect RF cables W275 and W284 from RF connectors X205 and X204 of Motherboard and
pull the cables out under the transceiver.
5. Turn the R&S M3SR Series 4100 150 W HF Transceiver upside down and undo and remove the
eight screws at the bottom of the Power Amplifier
/ Power Supply (A30).
6. Disconnect the three ribbon cables W280, W281 and W52 from connectors X280, X281 and X250
at the Motherboard and bend the cables carefully upwards.
7. Carefully pull the Power Amplifier (A30) up to the top, holding it strictly vertical.
CAUTION
The Power Amplifier (A30) is compactly designed and heavy. When lifting it off to the
top, be sure to hold it absolutely vertical, otherwise it may get jammed in the trans
-
ceiver. Make sure that the RF cables and ribbon cables are not scratched at edges or
sharply bent.
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