Thise controller ZR5 used in the zone 83_11 later.
Data from all chips saved in BIN folder.

Similar work bin files stored (for test only!!!)  placed in folders:
PAT, UNILIVER.

Short ZD 15V on 2X1 (supply 12V for relays 2X8)
Replaced MAX485 on SN65176.
Circuit #681, #252.
Befor repair sumtime controller displayed SYSTEM FAILER.

Must be tested after repair.