• When power is turned on the CPU turns off the Photo Coupler and
turns on the relay for the main Power Circuits (B1 Voltage).
• Turning off the Photo Coupler means there is no control over the
output
• The Error Amp is activated and Monitors the B1 supply.
• The Error Amp uses the Photo Coupler to control the Switching IC’s
Off times
• In case of additional power requirements by the TV circuits, instead of
waiting for the internal Timing generator to turn ON the Switching IC,
we can refresh the IC.
• The Refresh circuit is added and works by raising pin1 above 2.0V and
dropping it back to zero.
• On the negative edge, the IC will reset again and start conduction.
