Brother International HL-720 Service Manual - Page 137
Appendix 6., Low-Voltage Power Supply PCB Circuit Diagram 230V
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Appendix 6. Low-Voltage Power Supply PCB Circuit Diagram 230V L SW1 F1 CN1 C15 C7 B FG FG BEA1 C8 R5 R6 PC1 Q2 R10 C13 R8 R13 R11 C10 R9 D4 C11 D6 R17 D7 R7 C9 Q1 R18 Z1 C1 D11 D14 NTC1 L1 C5 + D13 D12 R1 R2 R3 C6 C22 R23 PC2 R20 R21 R22 TRA1 Z2 T1 CN1 C102 D101 C203 R203 Q202 C202 R206 R204 C201 R208 Q201 R201 D201 R207 c C301 + Q301 IC301 C310 R314 R310 R311 R313 R312 PC2 R110 VR301 D202 T201 B A c C101 + D104 A B D110 R101 R103 R102 R106 C110 Q101 R105 VR101 R104 A PC1 CN101 24V GND 5V REM GND V - 5 NAME Low-Voltage PS Circuit 230V
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Appendix 6.
Low-Voltage Power Supply PCB Circuit Diagram 230V
Low-Voltage
PS Circuit
230V
NAME
A
A
A
B
B
B
c
c
F1
Z1
Z2
C1
C6
L1
L
SW1
CN1
NTC1
BEA1
D14
D12
D13
D11
C5
C22
R23
R3
R2
R5
R9
C8
PC2
R22
TRA1
R20
R21
CN1
R101
D110
IC301
Q101
Q301
Q202
R106
PC1
R104
R105
VR101
VR301
R103
C110
R102
Q2
Q1
R18
R11
R13
C9
R8
C10
C13
PC1
R6
R10
C11
D7
R7
D4
D6
R17
T1
Q201
D101
C102
C7
C15
R110
C310
C202
R203
C203
R206
R204
R310
R312
R311
R314
T201
D202
C201
R208
R313
+
+
C301
R207
D201
+
C101
D104
PC2
REM
GND
24V
GND
5V
CN101
FG
FG
V - 5
R201
R1