Oki Data CONFIDENTIAL
43605601TH Rev. 1
173 /
7.5.2.(1) LCD Display Malfunction
(1-1) Nothing is displayed in LCD
Confirmation Items
Confirmation Tasks
Action at NG
(1-1-1) Fuse confirmation
F4 (fuse) of main board
(M32 PCB)
Confirm whether F4 is cut.
Exchange F4 or
M32PCB.
(1-1-2) Check the connection
Connection of low-voltage
power supply unit and
main board (M32 PCB).
Confirm whether the cord is normally connected from
a low-voltage power supply to the POW connector of
main board (M32 PCB)
Check whether incompletely connection and oblique
insertion of connector exist.
Try to plug in the
code normally.
Connection cable between
low-voltage power supply
unit and main board (M32
PCB).
Confirm whether it is disconnected.
Confirm whether the coating peeling off exists.
Check whether Cord ASSY defect exists such as the
wire pulled out.
Replace it with
normal low-voltage
power supply unit.
Connection of main board
(M32 PCB) and scanner
unit.
Confirm whether cable is normally connected with the
SCNIF1 connector of main board (M32 PCB).
Confirm whether cable is normally connected with the
drawer connector.
Check whether incompletely connection and oblique
insertion of connector exist.
Try to insert the
cord normally.
Connection cable between
main board (M32 PCB)
and scanner unit.
Disconnection check by the tester. Confirm the coating
peeling off by visual inspection.
Replace it with
normal cable.
(1-1-3) Peripheral check of power supply
AC power supply supplied
to the printer.
Confirm the supplied voltage of the AC power supply.
Supply the AC
power supply.
Voltage setting of low-
voltage supply unit (110V/
230V).
Measurement of supplied AC voltage.
Confirm the power supply setting of the equipment
used.
(Confirm the short plug of the low-voltage supply
setting switch. Short plug Have/None=100V /230V)
Adjust the low-
voltage power
supply setting.
The 5V power supply
supplied to the main board
(M32 PCB).
Confirm the 5V power supply by 7, 8, 9, 10pin of POW
connector of the PU board (M32 PCB).
Exchange the Low-
voltage power
supply.
The 30V power supply
supplied to the scanner
unit.
Confirm the 30V power supply by 1 and 3 pin of
SCNIF1 connector of main board (M32 PCB).
Exchange
M32PCB.
(1-1-4) Short circuit confirmation of power supply
The 5V power supply and
24V power supply and 30V
power supply supplied to
the main board (BLA PCB)
Confirm whether short circuit exists by the POW
connector of the main board.
If
1, 2 pin : OVP
3 pin
: OVU
4 pin
: +30V
5, 6 pin : +24V
7, 8, 9, 10 pin:+5V
11~15 pin :OVL are measured, the position of short
circuit can be located.
Pulling out the cords connected with the main board
(M32 PCB) one by one, and then fix the position of
short-circuit.
Exchange the short
parts.
Summary of Contents for C3530n MFP
Page 1: ...Oki Data CONFIDENTIAL C3530nMFP Maintenance Manual 032807A ...
Page 8: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 ...
Page 50: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 50 Sample In case of C3530MFP 2 ...
Page 108: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 108 ...
Page 109: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 109 ...
Page 220: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 220 ...
Page 221: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 221 ...
Page 229: ...Oki Data CONFIDENTIAL 43605601TH Rev 1 229 229 Solder side ...
Page 230: ...Please refer to the Illustrated Parts Manual for spare part information ...