JVC AV-27MF36 Power Supply Training page 39

There are 2 general types of circuit configurations used in JVC Power Supplies.
TYPE 1 - ALWAYS ON
•Utilizes a Standby Mode when TV Power is OFF.
•Standby Voltage for Micon is supplied by Switching Circuits.
•Example shown that T2921 supplies voltage to the DC Regulator (IC2922).
•The Micon will turn ON RY2952 to allow B1 Voltage flow when the TV is turned ON.
•Reference Schematic YA321 Power and Def PWB for Schematic Details.
TYPE 2 - POWER ON
•Switching circuits supply Power after TV Power is ON.
•Standby Voltage for Micon is supplied from DC Voltage tapped directly from incoming AC line.
•In the example shown, the Standby VCC is supplied by T951, D954-D957 and C951.
•The Micon turns ON RY951, this allows AC Voltage to flow to the Switching Circuits when the
TV is turned ON.
•Reference Schematic 52004 Main PWB for Schematic Details