Brother International HL-1260 Service Manual - Page 48
High-Voltage Power Supply Block Diagram 2
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P4 /HVT3 8 /HVT2 7 HVTFB 10 HVT4 9 /HVT1 6 TONER1 11 TONER2 13 0V 12 24VRET 14 +5V 15 +24V 16 TRANSFER HIGH-VOLTAGE Pulse Generator Current Buffer Attenuator Current Buffer Constant Current Control Unit (Feedback Circuit) (ON / OFF Circuit) Constant Voltage Control Unit (HVT4 Control Circuit) Pulse Generator Current Buffer High-Voltage Electrode P5 TONER SENSE Toner Sense Control Unit (Toner 1 Circuit) (Toner 2 Circuit) Figure 3.11 High-Voltage Power Supply Block Diagram 2 Toner Sense Electrode P3 DBOUT III - 16
III -
16
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