Ive had chance to put the SARBE-5 onto the bench PSU, and power it up in its BITE mode. It looks like the BEACON mode fails self test, but receive and manual transmit seem to pass. As its only the receiver im interested in, thats quite fine by me.
The next stage then is to get the antenna socket repaired. This time, unlike the mk6, im going to cut the transducer and power wiring, rather than unthread it from the loom, as it is much smaller gauge wire than the mk6.
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| Empty case showing antenna socket |
The antenna socket has a small piece of PCB material, plus a small ceramic capacitor. The PCB is slotted and serves as a keying point for the main board. With the PCB and capacitor, and the transducer, removed, the antenna socket could be reseated and the nut tightened. The transducer was then reinstalled, and the PCB and capacitor soldered back on.
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| Top side of electronics |
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| Under side of electronics |
The above views of the electronics package show the complexity and compactness of this unit. The two Tx crystals are easy to see, and being socketed were very easy to remove! Next step before refitting the electronics is to totally disable the Tx by disconnecting the reed switch contacts feeding the Tx and Beacon sections with power.
The above is the beacon switching board, and its specialist IC. Ive removed this as it is only used in the Tx function, and the IC itself is of interest. It shouldnt have any effect on the receivers.
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