Brother HL-1260 service manual High-Voltage Power Supply Block Diagram

TRANSFER HIGH-VOLTAGE

		Pulse	Current
		Generator	Buffer
		Attenuator	Current
			Buffer
			Constant Current
			Control Unit
			(Feedback Circuit)
			(ON / OFF Circuit)
	P4
/HVT3	8
/HVT2	7		Constant Voltage
			Control Unit
HVTFB	10
HVT4	9		(HVT4 Control Circuit)
/HVT1	6
TONER1	11
TONER2	13
0V	12	Pulse	Current
		Generator	Buffer
24VRET	14
+5V	15
+24V	16

TONER SENSE

Toner Sense

Control Unit

(Toner 1 Circuit)

(Toner 2 Circuit)

High-Voltage Electrode

P5

Toner Sense Electrode

P3

DBOUT

Figure 3.11 High-Voltage Power Supply Block Diagram 2

III- 16