III -
15
TRANSFER HIGH-VOLTAGE
TONER SENSE
DBOUT
P4
8
7
10
9
6
11
13
12
14
15
16
/HVT3
/HVT2
HVTFB
HVT4
/HVT1
TONER1
TONER2
0V
24VRET
+5V
+24V
Pulse
Generator
Current
Buffer
P5
High-Voltage
Electrode
Current
Buffer
Attenuator
Constant Current
Control Unit
(Feedback Circuit)
(ON / OFF Circuit)
Toner Sense
Control Unit
(HVT4 Control Circuit)
Current
Buffer
(Toner 1 Circuit)
(Toner 2 Circuit)
P3
Toner Sense
Electrode
Pulse
Generator
Constant Voltage
Control Unit
Figure 3.11 High-Voltage Power Supply Block Diagram 2
Summary of Contents for 1660e - B/W Laser Printer
Page 1: ...MECHANICS ELECTRONICS SERVICE MANUAL LASER PRINTER ...
Page 109: ...Appendix 3 Main PCB Circuitry Diagram 1 7 CODE UK3787000 B48K294 295CIR 1 7 NAME A 3 ...
Page 110: ...Appendix 4 Main PCB Circuitry Diagram 2 7 CODE UK3787000 B48K294 295CIR 2 7 NAME A 4 ...
Page 111: ...Appendix 5 Main PCB Circuitry Diagram 3 7 CODE UK3787000 B48K294 295CIR 3 7 NAME A 5 ...
Page 112: ...Appendix 6 Main PCB Circuitry Diagram 4 7 CODE UK3787000 B48K294 295CIR 4 7 NAME A 6 ...
Page 113: ...Appendix 7 Main PCB Circuitry Diagram 5 7 CODE UK3787000 B48K294 295CIR 5 7 NAME A 7 ...
Page 114: ...Appendix 8 Main PCB Circuitry Diagram 6 7 CODE UK3787000 B48K294 295 CIR 6 7 NAME A 8 ...
Page 115: ...Appendix 9 Main PCB Circuitry Diagram 7 7 CODE UK3787000 B48K294 295CIR 7 7 NAME A 9 ...
Page 116: ...Appendix 10 Control Panel PCB Circuitry Diagram 1 1 A 10 CODE NAME UK2527000 B48K143CIR ...
Page 117: ...Appendix 11 Scanner LD PCB Circuitry Diagram 1 1 A 11 CODE NAME UK2674000 B48K165CIR ...