• Use the FUNCTION CHECK PROCEDURE to power on the Television.
• Check the Switching ICs pin4 VCC for approximately 14VDC. This is supplied
by the StartUp circuit previously outlined.
• If this voltage is not present, check the circuits that supply this voltage to the IC.
• Check the Diode, Resistor and Capacitor that make up this circuit for opens or
shorts.
• This circuit is connected to the Photo Coupler circuit so it may be necessary to
check or desolder these components to eliminate the possibility of them being the
trouble.
• Desoldering and Lifting the ICs pin 4 will allow the check of this voltage without
the influence of the Switching IC.
Always Replace the IC and the Capacitor on the VCC input together.
