Brother International HL-720 Service Manual - Page 90
Appendix 9., High-Voltage Power Supply PCB Circuit Diagram, HL-720/ 730/730Plus
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Appendix 9. High-Voltage Power Supply PCB Circuit Diagram, HL-720/ 730/730Plus A B C D E F G H 1 1 2 2 3 3 P1 CN1 11 +24V R1 CN1 R4 6 CHAR CN1 12 0V CN1 7 DEVE R2 Q6 R3 C2 D2 R8 R6 R16 R9 R7 R12 Q4 Q3 Q5 R17 R15 R33 R10 R5 C3 + C5 D4 C4 Q2 R11 R13 D3 + C1 R35 D6 B1 DB1 RB1 OUT1 CB1 RB2 CB2 Q1 R14 DB2 D5 R37 C31 OUT2 Q31 Q39 Q32 Q40 Q33 Q41 Q38 R38 D33 VR34 R45 VR31 C32 C35 R36 VR33 C33 Q37 R42 R41 R40 R39 R32 Q201 R34 CN1 8 VCLN C201 C202 R201 VR201 R202 R203 D201 D202 Z201 D32 Q34 Q42 Q35 Q36 VCLN C101 R107 R106 R105 Q101 R104 R103 R102 R101 D101 GRID P4 1 DRMB 2 N.C. C102 4 4 5 5 D102 VR101 C34 R44 VR32 D34 6 6 7 7 8 8 9 9 CN1 10 TRAF R60 R81 Q53 D52 R59 R63 B51 C56 C54 D57 D58 C57 R57 OUT3 Q51 D53 R62 R58 D62 R54 R55 D51 D54 D55 C52 C51 R52 C53 CN1 9 TRAB Q55 R51 R82 R60 R53 IC1 R65 B52 D60 Q 52 C59 R66 D61 R85 R70 R56 R67 C61 C60 C55 R68 C58 R65 D63 C62 VR53 R72 R86 R61 1 +5V 2 THER 3 FANC 4 ELCT 5 PSEN P2 1 +24V 2 FANC 3 0V P3 1 THER 2 +5V 3 ELCT 4 +24V R301 3 1 4 2 PC1 10 10 11 NAME High-Voltage PS Circuit 11 V - 10 12 12 A B C D E F G H
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