Oki MICROLINE 320 Turbo Maintenance Manual

42089201TH Rev.4 9 /
Oki Data CONFIDENTIAL
2. THEORY OF OPERATION
2.1 Electrical Operation
The electrical operation of the printer circuit is described in this section.
2.1.1 Summary
Fig. 2-1 shows the block diagram of the printer.
The control board is made up of the microprocessors, peripheral circuits, drive circuits, sensors
and interface connectors.
The power to the control board is supplied by the power board through the connector cord.
The power to other electrical parts is also distributed through the connectors within the control
board.
2.1.2 Microprocessor and the Peripheral Circuit
(1) Microprocessor (67X640)
This processor is a CMOS single-chip computer with integrated peripheral device functions
and a 16 bit MPU core, all OKI original architecture.
The processor has a 20 bit address bus and a 16 bit data bus.
It is capable of accessing up to 4M bit program memory and 128K bytes of data memory.
The following characteristics are also provided:
• Built-in type data memory of 512 bytes
• 8-bit 4-channel A/D converter × 1
• 16-bit automatic reload timer × 2
• 8-bit serial port × 2
• 8-bit parallel port × 3 (bitwise I/O specification available)
And others.
The function of this microprocessor is to provide a central mechanism for the entire printer
by executing the control program through the LSI and driver circuits.

Oki MICROLINE 320 Turbo Specifications

General

Color	No
Built-in barcodes	Code 39
Maximum resolution	288 x 144 DPI
Maximum number of copies	6 copies
Media thickness	0.36 - 0.43 mm
Dimensions (WxDxH)	399 x 355 x 117 mm
Networking features	OkiLAN 6120e 10/100 Base-T
Connectivity technology	Wired
Compatible operating systems	Windows Vista, XP, 2000/ME, 98 & NT 40; UNIX, MS-DOS, Novell
Page description languages	Epson FX
Sound pressure level (printing)	52 dB
Mean time between failures (MTBF)	10000 h
Power consumption (typical)	100 W
Operating temperature (T-T)	5 - 40 °C
Operating relative humidity (H-H)	20 - 80 %