Brother International IntelliFax-3550 Service Manual - Page 179

MA I N P5 CONNECTOR 1 2 8 A- 0 2 6 S2 B +5V P3 CONNECTOR B5 B- PH L ASER 3 +5V GND 2 GND SCDT 4B 1 VDO REI KI 3A 4 L DON BD 6A RESI 2A 5 R1 1 / 4 W 3 0 0 +5V PC1 A C PHOTOSENSOR ON1 0 2 4 K E BD Q3 SWITCHING TRANSISTOR DT C1 1 4 YS A G N D T CS 3B COV E R 13A T ENSHAHL 1 1 B R2 1 / 4 W 3 0 0 +5V PC2 A PHOTOSENSOR ON1 0 2 4 K S W 1 LEAF SW S W- 1 6 2 GND GND C E GND Q2 SWITCHING TRANSISTOR G N D DT C1 1 4 YSA +5V +24V P1 CONNECTOR 52045- 1245 HVPS 12 +5V 2 +24V 3 / T RANSF T ENSHAL L 8A 4 / T RANSB GE NZ OL 8B 6 / DE V E L OP T AI DENL 12B 7 / CHA RGE VCL NL 11A 5 / VCNT R EL L 12A 9 EL CT L F ANL 7B 10 F ANCT L HAI SI 7A 8 PSENS HET H +5V GND GND T NER S OT H2 +24V 2 4 VRET 2 4 VRET DRI VL 13B 2B 1A 1B 6B 9A 9B 10A 10B 5A +5V C1 N. C. L1 N. C GND FG Q4 SWITCHING TRANSISTOR DT C1 1 4 YSA GND +24V C2 N. C. 2 4 VRET Q 5 SWITCHING TRANSISTOR DT C1 1 4 YSA 11 R3 150k P4 1 1 / 4 W CONNECTOR + 5 V B4 B- PH- K 2 4 VRET T ONE R 1 +5V T HERM 2 4 VRET 2 T NER 4 S OT H2 3 T NG +24V P2 CONNECTOR F PC- 5 POLYGON MOTOR C3 CC1 0 4 R4 1/ 2W Q1 1 2. 2K T R2 SA1 2 8 3 - D GND 2 2 4 VRET 3 MOT ON 2 4 VRET DRI VL L OCK 5B 4 L OCK SCCKL 4A C4 CC1 0 2 5 SCCKL S0 V B RELAY PCB