Oki Microline 390

I I
PROM
128 kbyte
/
MSM6990 \
PAPER END SENSOR
~;;%L --+
SA8F SWITCH
KERFACE ---+I
SP DRIVER
CIRCUIT
ADDRESS BUS
2
<
CN6
1
2
*
ADDRESSANDDATABUS
CN7
I 1
$C
D-RAM
RAM ADDRESS
48 kbyte
CN4
MSM79H097
i_J DMA,
HEAD DRIVE
& LF MOTOR
CONTROL
-r
I
C!
-_I
1
(for
SP MOTOR
+M
0
~_________.
_: POSITION I
:X%X__:
iF)
‘ARALLEL INTERFACE
L
OPTIONAL INTERFACE
RS-232URS422
LF MOTOR
-M
0
PRINTHEAD
(WITH BUILT-IN TEMPE-
RATURESENSOR)
(OPTION)
RES:CG
ROM
512 kbyte
POWERSUPPLY CIRCUIT
DCPOWER i’, l
SUPPLY
-+ +5v
BOARO
-+ tm”
WAII-1
-* +lo”Ac
I-
_-
Figure 3-1 Block diagram