Fixed voltage ( or Auto voltage selectable
) power supply circuit is used in this unit. If Main Fuse (F601) is
blown, check to see that all components in the power supply circuit are
not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to
fail.
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN
THE POWER SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED. ALSO,
IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT SLOWLY, WHEN
TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT, A VARIABLE ISOLATION
TRANSFORMER IS REQUIRED.
SMPS schematic
Back-light inverter
LCD
Main Schematic Diagram
Click on the schematics to magnify