For CLP-350N, what should I do about vertical streak and abnormal noise?

Last Update date : 2015.09.22



For CLP-350N, if you meet below defect such as vertical streak and abnormal noise, please check whether CLP-350N was produced before 12th March, 2008 and using Firmware ~V1.30.01.58 or not, and contact for repair.


For checking Firmware version, you can press button “Cancel” over 10 second and then printout the configuration report (Firmware information are on the report). 


1)      Why does SCX-4521F have two cover color? 

Ans.: Changed the cover-color from 31 Oct., 2006, befor : SOFT WHITE & 


2)      What is parallel port? Why USB instead of parallel port? 

Ans.: Parallel ports simultaneously transmit 8 bits of data and are used primarily by printers.

Types of parallel ports:

l          Standard parallel port (SPP): single-directional

l          EPP (Enhanced Parallel Port): bidirectional

l          ECP (Extended Capabilities Port): EPP plus DMA

Parallel port off board is configured in CMOS setup. However, Parallel port technology is being replaced by USB.

Advantages of USB ports over parallel and serial ports

    USB is much faster than regular ports

    USB uses higher-quality cabling

    USB is much easier to manage

    USB allows for hot-swapping and hot-pluggable devices

Some USB devices: mouse, printer, scanner, modem

    Connect device to USB port off board or adapter card

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