How can i solve sparking problem with kenwood km250 ?

See Setting Mode of this manual on page 37.
It may solve your problem.

NX-P500_K (kenwood.com)

Sounds like it is faulty and needs repairing.

Support ' CAR ENTERTAINMENT - KENWOOD

https://www.kenwood.com > car > support
Find Store / Find Service Centre · Manuals · Software / Firmware Updates · Find Store / Find Service Centre · Manuals. Brochures. eXcelon Products.

Manual
https://manual.kenwood.com/files/B5A-1048-00c_K_EN.pdf

..

Kenwood KDC 139 displaying :OCER - Fixya

www.fixya.com > ... > Car Audio & Video > Kenwood

Nov 19, 2019 - OCER indicates that the unit is in protect mode. First press the reset button (tiny pinhole button). If the unit comes back on saying OCER then most likely there is a ... KDC-139 error code DCER won't - Fixya
Sep. 28, 2008
SOLVED: Where is the reset button positioned in KDC-139 ...
Oct. 2, 2015
SOLVED: My kenwood KDC-139 when its turned on display ...
Feb. 13, 2011
KDC-139 DCER DISPLAY - Fixya
Oct. 3, 2015
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Kenwood Kdc 139 - BoostCruising

www.boostcruising.com > advice > 456667-Kenwood-KD...
( 92waggz ) hey guys my mate has a kenwood kdc 139 headunit and the code DCER or OCER is coming up i have had a search around on the net to fidn a ...

KDC-MP439 KDC-MP3039 KDC-MP339 KDC ... - Kenwood

manual.kenwood.com > B64-3901-00_00_MW_En

PDF Clock display (KDC-139) ... demonstration. KDC-139. Display. Setting Setting overview. Source. "CLCK". Refer to page 11 ... you have to start over from step 4.

http://manual.kenwood.com/files/IM366_Ref_K_En_03.pdf

Check out page 86 in this PDF to help solve your problem.

It is a 650 Watt appliance.

The only way to get the code is to call Kenwood and give them the serial #. Here is there #

By mail:
Kenwood USA Corporation
PO Box 22745
Long Beach, CA 90801-5745

By Phone
(310) 761-8802
or toll free 1-800-KENWOOD (536-9663)

Or here is there web site.

http://www.kenwoodusa.com/Contact/

sounds like aproblem with the brushes are worn out or damaged armature if you contiue to use it before you check the brushes you will permetly damage it

HI, Yes i managed to solve my problem by going to the website www.kenwood-electronics.co.uk

your speaker output is shorting either at the output terminals or at the speaker input . check the cabling . it will solve the problem