Brother International HL 1850 Service Manual - Page 91
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HL-1850/1870N SERVICE MANUAL 1.6.2 High-voltage power supply The high-voltage power supply generates and outputs the voltages and currents for the charging, development and transfer functions. For the circuit diagram of the high-voltage power supply PCB, see APPENDIX 13. `HIGHVOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM' in this manual. 24VI I I I I I i 411) I Current Regulator 31IE B1 Voltage Regulator VR21 Current Regulator 311i( . B61 Q63 Voltage Regulator ] II[ B81 Q82 Supply Roller 0 Transfer Roller Cleaning Brush Development Roller Photosensitive Drum I --r--i Corona Unit VR81 Voltage Regulator Z51 VR51 Voltage Regulator VR31 L= = = = = = = = = = = = Fig. 3-17 3-17
HL
-1850/1870N
SERVICE
MANUAL
1.6.2
High
-voltage
power
supply
The
high
-voltage
power
supply
generates
and
outputs
the
voltages
and
currents
for
the
charging,
development
and
transfer
functions.
For
the
circuit
diagram
of
the
high
-voltage
power
supply
PCB,
see
APPENDIX
13.
`HIGH
-
VOLTAGE
POWER
SUPPLY
PCB
CIRCUIT
DIAGRAM'
in
this
manual.
24VI
I
I
I
Current
Regulator
31IE
B1
I
I
i
41
1
)
I
Voltage
Regulator
VR21
Current
Regulator
311(
i
.
B61
Q63
Voltage
Regulator
]
I I [
B81
Q82
VR81
Voltage
Regulator
Z51
VR51
Voltage
Regulator
VR31
L
=
=
=
=
=
=
=
=
=
=
=
=
Supply
Roller
Development
Roller
0
Transfer
Roller
Cleaning
Brush
Photosensitive
Drum
I
--r
--
i
Corona
Unit
Fig.
3-17
3-17