Oki ML420 - Using Your Printer; Parts Identification: Rear Feed

42113901TH01 Rev.3 10 /
Oki Data CONFIDENTIAL
Figure 2-1
HTEMP
14.456
MHz
4
POWLEV
HTEMP
HEADGAP
SPTEMP
A/D
PE-SENSOR
OPERATION
PANEL
Serial
Alarm
-circuit
HD alarm
Over-V alarm
Over-V alarm
FAN alarm
Power-off
Transformer
Rectifier
circuit
50 volt
12 volt
5 volt
42V
-8V
3.3V
5VS
Reset
circuit
I/F-IPT
Print-IPT
EEPROM
1Kbits
Microproce-
ssor
ADDRESS
Serial
Serial
ROM
4Mbit
AD-BUS
DRAM
4Mbit
LSI
RESET
5VD
POWLEV
Fuse
42 V
SP/LF
driver
HD alarm
SPTEMP
Head
driver
Photo sensor
HEAD
M
M
SP
Thermister
LF
FAN
HTEMP
(opt.)
Serial-
I/F
(opt.)
Roll paper
stand
(opt.)
CSF
AC-input
SW
AC Fuse
Divider
Converter
Release-SW
Bottom-SW
HEADGAP-SWHEADGAP
Para-
I/F
USB
I/F
M
USB
Controller