Power Supply Operation (Tc-32Lh, Tc-26/32Lx20); Power On Operation Of The Dc-To- Dc Converter - Panasonic TC-26LX20 Technical Manual

Power Supply Operation (TC-32LH, TC-26/32LX20)

D7011
T7004
Figure 19

Power On Operation of the DC-to- DC converter

The P board contains the drive voltage oscillator circuit that develops the 121 volts
needed to drive the LCD backlight. Operation begins with the discharge of transformer
T7002. The diode D7018 rectifies the AC voltage from the secondary of the transformer.
Approximately 30.1Vdc from the diode passes through the photo-coupler IC7005 and
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