10054 - GPRB input voltages correct? GPRB input voltages correct? Yes Go to 10053 - 10047 - Replace GPRB - Formal Procedure, Notes: 9007 No Go to 9095 - 9093 - Replace SC-771 Controller Board - Formal Procedure, Notes: 9007 Note 10055 - With the alarm/fault condition in question indicated on the SC-770 controller...