EMERSON LF391EM4 – EMERSON LF391EM1 – MAGNAVOX 39ME313V/F7 – POWER SUPPLY [SMPS] SCHEMATIC
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F602) 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 when repairing. Also, in order to have the ability to increase the input slowly, when troubleshooting this type of power supply circuit, a variable isolation transformer is required. For continued protection against risk of fire, replace only with same type 2.5A, 250V fuse.
MAIN POWER REGULATOR SCHEMATIC
BACK-LIGHT POWER REGULATOR SCHEMATIC
POWER PWB - TOP & BOTTOM VIEW
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