IBM 6150 Hardware Maintenance Manual page 107

TNL SN20-9850 (05-87) to 75X0152 or 75X0166
B9x
FRU: RT PC Modem Cable - X.21
Additional Tests: Run the R T PC Multiprotocol Adapter
Checkout.
Removal Procedure: See Adapter Removal in Section 4.
Repair Checkout: Run the RT PC Multiprotocol Adapter
Checkout.
CCx
Software Problem - - - - - - - - - - - - - - - - - - - - - ,
This SRA number indicates that a software problem exists. The
Advanced Diagnostic Routines can be used to ensure that no
hardware problem exists.
CDx
3-0020-38 Service Manual
External Power Failure --------------~
This SRA number is generated from an error log entry. There may
be a problem with the external power source.