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

		PRIMARY HIGH-VOLTAGE AC		High-Voltage
				Electrode
		Sin Wave	Current	P1
		Generator	Buffer
				DBOUT
			Control Unit
			(Feedback Circuit)
			(ON / OFF Circuit)
			PRIMARY HIGH-VOLTAGE DC
		Pulse	Current
		Generator	Buffer
			Current
		PULSE	Buffer
	P4
			Control Unit
/HV1AC	1
			(Feedback Circuit)
DNSTY	5		(DNSTY Control Circuit)
/HV1DC	2		(ON / OFF Circuit)
/DBAC	3
/DBDC	4	DEVELOPER BIAS AC		High-Voltage
				Electrode
		Pulse	Current	P2
		Generator	Buffer
			Control Unit
			(Feedback Circuit)
			(ON / OFF Circuit)
			DEVELOPER BIAS DC
		PULSE	Current
			Buffer
			Current
			Buffer
			Control Unit
			(Feedback Circuit)
			(DNSTY Control Circuit)
			(ON / OFF Circuit)

Figure 3.10 High-Voltage Power Supply Block Diagram 1

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