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The RX02 has a nice construction which should make it more easy to repair. There are two main circuit boards. The top board, for which you see the back when you look inside the machine, is called the M7744. :
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This is a rather complex board which actually implements a processor in discrete hardware! It uses two AM2901 bit slice processors and three AM2909 sequence generators. The CPU is a microcode based CPU with the microcode in PROMs. These PROMs are Harris 7643 PROMs:
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Anyway, by just releasing two screws you can flip that entire board up, so that you can access both its component side and the components on the analog board:
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Very nicely done, it reminds me of early HP equipment like the HP 9825A which also used something similar. If only machines nowadays would pay similar attention on how to be repaired…
Initial mini repairs
The machine was cleaned as much as possible, and the large capacitors were reformed during about 4 hours. The power cord of the device was broken, so it was replaced with a new cord and a new grommet:
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