1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
A
B
C
E
F
G
H
A
B
C
D
E
F
G
H
D
V - 10
Appendix 9. High-Voltage Power Supply PCB Circuit Diagram, HL-720/ 730/730Plus
OUT1
OUT2
GRID
P4
VCLN
DRMB
N.C.
OUT3
P1
+24V
CHAR
0V
DEVE
VCLN
TRAF
TRAB
+5V
THER
PC1
FANC
ELCT
PSEN
+24V
P2
FANC
0V
THER
P3
+5V
ELCT
+24V
11
6
12
7
8
10
9
1
2
3
4
1
2
3
1
2
3
4
5
CN1
CN1
CN1
CN1
CN1
CN1
CN1
1
2
RB1
R14
R17
R15
R12
R7
R16
R4
R1
DB1
D3
D4
D6
D5
D2
C4
C2
R9
R6
R8
R3
C5
C3
C1
DB2
RB2
+
+
R13
R5
R11
R10
R2
CB1
CB2
B1
Q1
Q31
Q32
Q33
Q39
Q40
Q41
Q4
Q2
D102
D34
D101
R104
R105
R106
R44
R32
R42
Q201
R41
R40
R39
R107
R103R102
R101
VR34
VR31
VR33
VR101
VR32
R37
R38
Q37
R35
R34
R36
R45
C101
C33
C34
C102
C35
C32
C31
Q38
Q34
Z201
C202
C201
R201
VR201
R202
R203
D202
D201
Q35
Q42
Q36
D32
Q101
R33
D58
D57
R58
R53
R57
R55
R65
IC1
R66
B52
D60
D61
Q55
B51
R54
R62
C56
C57
D53
R301
C54
C52
R52
R68
R65
R86
R85
R70
R56
R67
R60
R51
R72
R61
R82
VR53
R81
R60
R59
R63
C53
C51
C55
C62
C59
C60
C61
C58
Q 52
Q51
D62
D54
Q53
D52
D63
D55
D51
D33
Q6
Q5
Q3
1
2
3
4
High-Voltage PS Circuit
NAME
Summary of Contents for HL-720
Page 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Page 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Page 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Page 61: ... Fig 3 18 2 4 1 1 1 ...
Page 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Page 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Page 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Page 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Page 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Page 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Page 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...