Koso Digital Speedometer for Yamaha Mio

It has been quite a long and tiring year that I have not visited this site, and been quite busy on making another information to be shared to all my readers. In lieu of 2017, hopefully everything will be an easy one for me, and so in behalf of the start of a new chapter. Happy New Year to everyone visiting mastercircuits.blogspot.com

This post is just a reminder to all who wishes to use Koso Digital Speedometer for Yamaha Mio as shown

The speedometer is a direct replacement to the original analog type speedometer when you buy a brand new Yamaha Mio sporty model. No special wiring or rewiring, a direct plug and play. Who will not love this kind of a beautiful creation made by Koso Taiwan.

But to some who do not actually know the difference between analog and digital when it comes to speedometer for motorcycles. Special attention on the condition of your electrical is highly needed before wanting and trying to own the said speedometer. It is fragile if not taken care of properly.

Recently. I have been receiving units for repair from all over my country. The only cause that all of them broke down was battery related issues. A bit of CAUTION to those who are using it.

"DO NOT OPERATE YOUR MOTORCYCLE EQUIPPED WITH KOSO WITHOUT A HEALTHY BATTERY INSTALLED"

or

"NO LOOSE WIRING WITHIN THE ENTIRE POWER RAIL FROM BATTERY ALL THE WAY TO THE POWER CONNECTOR OF THE KOSO UNIT"

Battery acts as the entire voltage stabilizer for your electrical system. With any failure like fuse blown or loose contact connection or not properly bolted terminal. It will damage your unit.WHY?

Photo as shown came from one of the speedometer with on going repair.

The PCB traces was damage due to electrical issue and according to the owner of unit, It was loose battery connection and unsecured bolt on the terminal that causes voltage spike within the entire system.

As of the writing, the traces was gone both top and bottom side of the PCB. It is the trace that handles the power rail of the unit before reaching the step down converter circuit. It is probable that the drop converter which uses the Switchmode type was also damage.

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11 comments:

UnknownJune 11, 2018 at 3:26 PM
hi sir, is there a way to fix koso digital speedometer for mio? ganyan din po nangyari sakin, napaandar yung mio na walang battery. tnx!
MCircuitsJuly 14, 2018 at 7:16 AM
CHINO deGUZMAN
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MCircuitsJuly 14, 2018 at 7:17 AM
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UnknownFebruary 9, 2019 at 10:39 AM
Paano po paganahin di lumalabas ung speed...rpm lng po.thanks
MarvZMay 2, 2019 at 6:39 AM
Sir...pano mawawapa both signa light khit hindi ko pa ako nagsisignal light working n sa digital..tnx
MCircuitsMay 4, 2019 at 6:36 AM
@marvZ

Unfortunately, your koso needs immediate repair. feel free to contact me for more info.
UnknownMay 2, 2020 at 9:17 PM
Hi sir Ang problema sakin ay di na nag didisplay yung speed meter nya and also the signal ang light view how to sovlve this sir? any advise?
UnknownMay 15, 2020 at 12:13 PM
Pls send a wiring diagram
UnknownFebruary 7, 2021 at 10:04 AM
hellow ano po value un temp sensor natin mga sir!!
UnknownApril 24, 2021 at 12:55 PM
pa help nmn un high beam indicator ko nd na bigla umandar

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