When the AC cord is plugged in, the Standby Circuits should function. This
Circuit will supply the VCC to the Micon. Check this Voltage prior to continuing.
SRP-9022A-M2 PWB
The SRP-9022A-M2 PWB utilizes Power Supplies whose Standby VCC is created by a circuit that is
separate from the Switching Circuits.
• Check for the Standby VCC at the specified location.
• If the Standby VCC is not functional, begin at the incoming AC Line Voltage and check all voltages
supplying the Standby VCC circuit.
SSR-9001A-M2 PWB
•
The Standby VCC for the SSR-9001A-M2 PWB is created by the Switching Circuits.
• If the Standby VCC circuit is not functional, troubleshoot the Power line from the Transformer
supplying this voltage. In this case it is the 28V line.
•
Remember
: In Standby Mode the Power Supply voltage is reduced. The 28V line will put out 14V
in Standby Mode
• CP942 and CP941 may be removed to eliminate the possibility of others circuits creating shorts to
this supply. Check the DC at C938
