Oki B721 Maintenance Manual

45487001TH Rev.1
7-8 /
Oki Data CONFIDENTIAL
7. Connection diagrams
(3) Control panel PCB (PCQ PCB) (4) Environmental sensor PCB (enlargement)
LED2 LED1
LED3
SW7
SW0
C4
R6
D1
Q1
12
R2
SW2
SW6
SW5 SW4
SW8 SW11 SW14 SW17
SW9 SW12 SW15 SW18
SW10 SW13
R11 R12
R14
SW16 SW19
SW3
CP1
C5
R7
C6 C11
R15
R26
R27
OSC1
R13
C12
R8
C8
CN1
C1
C7
C2
B2
SW1
Environmental
sensor PCB
R528
R522
C507
R513
R517 R512 C506
RM505
Q501
Q503
Q502
R527
R533
FG1
C501
R501
R503
R520
R519
R516
R515
R514
R530
R508
R507
R506
R505
R504
C502
R502
C505
C504
CN502
R525
R511
R510
R509
R524
C509
RM504
RM534
13
24
25 36
37 48
1
12
RM503
RM501
IC501
RM502
CN501CN503
FG2
CN4
R24
R20
R21
HSNS
IC3
R22
R23
Q3
C18R15
R19
TH1
R25
Q2
Component side Soldering side

Oki B721 Specifications

General

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