Power Supply Operation (TC-32LH, TC-26/32LX20)
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
D7011
Figure 19
T7004
22
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