Brother International IntelliFax-3550 Service Manual - Page 48
This power supply generates high-voltage power sources from the 24V source fed from
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[ 2 ] High-voltage power supply PCB This power supply generates high-voltage power sources from the 24V source fed from the low-voltage power supply for charging, developing, and transferring in the laser printing process. 24VI Control 1 (TIDN TAIDEN) Fuse Type Resistor R1 11 0.22 1/6w Current Regulator 6 (250µA) B1 Q1 Control 2 7 (GENZ GENZOU) Voltage Regulator (600 ± 10V) (275 ± 7V) VR33 VR31 VR34 10 Control 3A (TENH TESHAH) Current Regulator (-3.0µA) B51 Q51 OUT1 OUT2 OUT3 Transfer Roller Developer Roller Laser-sensitive Drum Cleaner Roller Grid Corona Wire 9 Control 3B (TENL TESHAL) 12 GND VCLN 8 Voltage Regulator (1.8kV) B52 Q56VR53 Voltage Regulator (1.0kV) 910 Z201 VR201 Voltage Regulator (275V) VR101 Voltage Regulator (700V) VR32 GRID DRMBIAS VCLN High-voltage Power Supply Circuit III - 29