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Table of Contents

- 5 -

Cleaning the main unit and the parts ............ 312

Cleaning the LED head ................................... 312

Cleaning the surface of the main unit .............. 313

Cleaning paper feed rollers (Trays 1-4) ........... 314

Cleaning the paper feed roller (MP tray).......... 315

Cleaning the light-shielding film ....................... 319

Cleaning the resist roller .................................. 320

Updating software ......................................... 321

For Windows ................................................... 321

For macOS ...................................................... 321

Deleting software ........................................... 322

Uninstalling the Windows printer driver ........... 322

Uninstalling the macOS printer driver .............. 322

Firmware update ........................................... 324

For Windows ................................................... 324

For macOS ...................................................... 324

10. Troubleshooting .............................. 325

When an error message appears on the display

....................................................................... 326

Error message list ........................................... 327

When paper is jammed ................................. 337

For the error code 370 or 371 .......................... 337

For the error code 372 ..................................... 340

For the error code 380 ..................................... 342

For the error code 381 ..................................... 343

For the error code 382 or 385 .......................... 344

For the error code 390 ..................................... 348

For the error code 391, 392, 393 or 394 .......... 349

For the error code 638 ..................................... 350

Trouble with printing ...................................... 355

I cannot print .................................................... 355

Troubleshooting for wired LAN connection ...... 356

Troubleshooting for wireless LAN connection . 356

Troubleshooting for USB connection ............... 360

Troubleshooting for printing results ............... 361

List of troubles with printing results ................. 361

White streaks appear in the vertical direction .. 364

Printing is faint in the vertical direction ............ 364

Printing is light ................................................. 365

White dots or lines appear ............................... 365

Condensation occurs on printed paper ............ 366

Streaks appear in the vertical direction ........... 366

Dots and horizontal streaks appear in the paper

feeding direction periodically ........................... 367

White area is lightly stained ............................. 367

Edges of text are blurred ................................. 368

When envelopes or coated paper is printed, the

whole area is thinly stained ............................. 368

Toner comes off when rubbed ......................... 369

Uneven Gloss .................................................. 369

Point stains appear .......................................... 369

Stains are printed ............................................ 370

The entire paper is printed in black.................. 370

Nothing is printed ............................................ 370

White streaks occur ......................................... 371

The peripheral area is dirty .............................. 371

The color of images does not come as expected

........................................................................ 371

An afterimage printed on the front edge of the

paper is printed ................................................ 372

Software troubleshooting ...............................373

Troubleshooting for this machine and paper .374

Troubleshooting for the machine ..................... 374

Troubleshooting for the paper ......................... 377

When a power failure occurs ........................... 379

11. Appendix ......................................... 380

Specifications .................................................381

Regulatory wireless LAN statements ............... 383

Dimensions ....................................................385

Using the FAQ guide of this machine ............387

Menu tree .......................................................391

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Oki C650 Specifications

General

Duplex printing	Yes
Print technology	LED
Maximum resolution	1200 x 1200 DPI
Time to first page (black, normal)	6.5 s
Print speed (black, normal quality, A4/US Letter)	35 ppm
Wi-Fi	-
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
USB connector	USB Type-A
USB 2.0 ports quantity	1
Printer fonts	PCL
Maximum duty cycle	100000 pages per month
Recommended duty cycle	8000 - 100000 pages per month
Page description languages	Epson FX, IBM ProPrinter, PCL 5c, PCL 6, PDF, PostScript 3
Mobile operating systems supported	Android
Server operating systems supported	Windows Server 2008, Windows Server 2012, Windows Server 2016, Windows Server 2019
Windows operating systems supported	Windows 10, Windows 7, Windows 8, Windows 8.1
Total input capacity	250 sheets
Total output capacity	150 sheets
Maximum input capacity	1940 sheets
Paper tray 2 input capacity	530 sheets
Total number of input trays	4
Multi-Purpose tray input capacity	100 sheets
Paper tray media weight	60 - 256 g/m²
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6, B7, B8
Maximum ISO A-series paper size	A4
Product color	White
Market positioning	Home & office
Internal memory	3000 MB
Processor family	ARM Cortex-A9
Sound pressure level (standby)	32 dB
Sound pressure level (printing)	54 dB
Storage temperature (T-T)	10 - 32 °C
Operating temperature (T-T)	-10 - 43 °C
Storage relative humidity (H-H)	10 - 90 %
Operating relative humidity (H-H)	20 - 80 %
AC input voltage	220 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	1150 W
Power consumption (PowerSave)	14 W
Power consumption (average operating)	840 W
Maximum copy resolution	- DPI