DOWNLOAD Sharp AR-651 (serv.man20) Service Manual ↓ Size: 110.03 KB | Pages: 8 in PDF or view online for FREE

Model
AR-651 (serv.man20)
Pages
8
Size
110.03 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Power supply unit
File
ar-651-sm20.pdf
Date

Sharp AR-651 (serv.man20) Service Manual ▷ View online

AR-651/810  POWER SUPPLY UNIT  17 - 1
17.  POWER SUPPLY UNIT
17. 1.   Construction
The power supply unit is comprised of the AC filter and insulation type DC output circuits.
(1) AC filter
AC filter eliminates noise from the outside and prevents the noise generated by the copier from leaking to
the outside.
(2) DC output circuits
The DC outputs are roughly divided into the following two lines:
Main switch system
: Power supply used during image forming processes, consisting of the outputs of
four voltages (+3.3V, +5.1V, +12V and +24V) which start up when the main
switch is turned ON.
Door switch system
: Power supply used by the entire machine during image forming processes and
supplied via the door switch, consisting of the outputs of 3 voltages (+5.1V,
+24V and +36V) which start up when the main switch is turned ON with the door
switch being ON.
17. 2.   Operation of DC Output Circuits
(1) Start of operation
When the main switch of the copier is turned ON and if the door is closed, all the power supply systems
start up at the same time.
(2) Stop of operation
When the main switch of the copier is turned OFF, a power-OFF signal (PWR-DN) is output after an
instantaneous outage insurance time (20 ms mini.) has elapsed. After the power-OFF signal has been
output, the main system power supply is allowed to retain its rated voltages for the minimum retaining time
(50ms. or more) and then lets them start dropping.
(3) Output protection
Each output system includes an over-current protection circuit (a fuse and internal protection circuit) and
an over-voltage protection circuit. This is to prevent abnormal operation or damage to the secondary circuit
which may be caused by an over-current due to a shorted load or an over-voltage due to a short-circuit
between different voltages.
If the protection circuit has been activated and the fuse is not blown out, remove the cause of the short-
circuit and turn ON the power again to clear the circuit.
AR-651/810  POWER SUPPLY UNIT  17 - 2
17. 3.  Output Channel
There are 4 output channels which do not work with the door switch.
(1) 3.3V
3.3VA
: J407
5pin
Output to PLG board
3.3VB
: J408
5pin
Output to SLG board
3.3VC
: J405
1pin, 2pin
Output to SYS board
(2) 5.1V
5.1VB
: J405
5pin, 6pin
Output to SYS board and printer board (via SYS board)
5.1VC
: J405
7pin
Output to HDD
5.1VD
: J406
1pin, 2pin
Output to LGC board
5.1VE
: J408
7pin, 8pin
Output to SLG board
5.1VF
: J407
1pin
Output to PLG board
5.1VG
: J407
2pin
Output to PLG board
5.1VH
: J409
1pin
Output to Finisher
(3) 12V
12VA
: J405
13pin
Output to HDD
12VB
: J407
6pin
Output to PLG board
12VC
: J408
11pin
Output to SLG board
12VD
: J406
8pin
Output to LGC board
AR-651/810  POWER SUPPLY UNIT  17 - 3
(4) 24V
24VF
: J408
1pin, 2pin
Output to RADF
24VG
: J406
4pin
Output to LGC board
There are 3 output channels which work with the door switch.
(1) 5.1V
5.1VA
: J403
3pin
Output to PLG board
(2) 24V
24VA
: J402
1pin
Output to LGC board
24VB
: J402
2pin
Output to LGC board
24VC
: J402
3pin
Output to LGC board
24VD
: J403
1pin
Output to PLG board
24VE
: J404
5pin
Output to SLG board
24VH
: J409
3pin, 4pin
Output to Finisher
(3) 36V
36VA
: J402
7pin
Output to LGC board
36VB
: J402
8pin
Output to LGC board
36VC
: J404
1pin, 2pin
Output to SLG board
AR-651/810  POWER SUPPLY UNIT  17 - 4
<<Output connector>>
Not working with the door switch
J405
for SYS board
J406
for LGC board
J407
for PLG board
J408
for SLG board
J409
for Finisher
(1pin, 2pin)
Working with the door switch
J402
for LGC board
J403
for PLG board
J404
for SLG board
J409
for Finisher
(3pin~6pin)
Page of 8
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  • DOWNLOAD Sharp AR-651 (serv.man20) Service Manual ↓ Size: 110.03 KB | Pages: 8 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp AR-651 (serv.man20) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp AR-651 (serv.man20) Copying Equipment. Information contained in Sharp AR-651 (serv.man20) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.