Oki B721 Maintenance Manual

Oki Data CONFIDENTIAL
45487001TH Rev.1
6-65 /
6. Troubleshooting procedure
6.5.2.(18) Wiring diagram
WLAN
module
HEAD
Toner
sensor
PCB
HDD
Centro PCB
Cover
switch1
(IL)
Enviromental sensor
PCB
Control panel
PCB
Power SW
PCB
Front sensor
PCB
PCQ PCB
High-voltage
power supply
PCB
Low-voltage
power supply
PCB
Fuser FAN Rear FAN
AC inlet
Fuser unit
2nd Tray unit
TAG PCB(ID)
TAG PCB(TC)
ID thermistor
PU/CU PCB
TONER
OPE
ILHVOLT
SATA IF
LAN
CENT
SATA POW
PWSW
POWER
ID TEMP
HEAT
TAG
OPTION
3rd Tray unit
4th Tray unit
LAN
USB
(Device)
Centronics
Front
USB
HEAD0 WLPOW
LAN2USB1USB3
DUPF sensor
DUP IN sensor
EXIT sensor
Rear switch
FU sensor
DUPSNS
REGCLT
HOP
motor
IN1 sensor
DC HOP
ID
motor
DC ID ID FAN
Fuser
motor
ID2 FAN
DUP
Relay
POWFAN
Power
FAN
DC HEAT
Dup
motor
Dup
clutch
Dup
solenoid
REG1
clutch
TRAY1
HOP
clutch
MPT
clutch
REG2
clutch
RSNS
Relay
FSNS
WR2 sensor
MPT PE sensor
WR2
STKFL
sensor
STKL
MPTPE
PSIZE
HOPCLT
MPTCLT
TRAY1
HOP
sensor
PEHOP
TRAY1
PE
sensor
Relay
Relay
Relay
Relay
IN2 sensor
Relay
Relay
TRAY1 paper size switch
①
㉕
㉙
㉜
㉑
⑱
⑮
⑲
②
⑪
④
⑨
Optoin Tray Boad
To printer main unit
or upper tray
Boad-GOH12
HOP
motor
To lower tray
IN
sensor
Paper
size
sensor
HOP
sensor
PE
sensor
HOP
clutch
REG
clutch

Oki B721 Specifications

General

Print Technology	LED
Resolution	1200 x 1200 dpi
Processor	533 MHz
Memory	256 MB
Connectivity	USB, Ethernet
Duplex Printing	Standard