Fig.2.25 Cfl Backlight Circuit - Brother DP-525CJ Service Manual

SERVICE MANUAL
9.4. Power Supply for CFL Backlight
The CFL backlight circuit consists of the control circuit that turns ON/OFF the CFL and
the inverter PCB.
The ON/OFF status of the CFL is controlled by the CFLON terminal of the CBIC (#8).
The inverter PCB converts +5V to AC voltage to drive the CFL tube. The type of
inverter PCB differs according to the LCD.
Fig. 2.25 shows the CFL backlight circuit.

Fig.2.25 CFL Backlight Circuit

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THEORY
Electrical