This maintenance manual is for the Sony BKS-R1617/R1621 Multi Bus Control Unit, BKS-R3216 Multi Display Control Unit, BKS-R1617/R1621 Universal Control Unit, BKS-R1618/R3219 X-Y Control Unit, BKS-R3220, BKS-R3240A, BKS-R3242A, and BKS-R3248A. It is available in English language format.
