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Last Updated: July 06, 2011

Wave 125 S Panel Repair

Recently, a friend of mine is asking if i can repair his Honda Wave 125 S speedometer panel that is not functioning. No power, no activity. I said of course. so he handed it to me, and test. Before i opened the said panel, i needed to have a wiring diagram of the model, and here it is.
Although the picture seems blurred when i got it from a site, the color coding is enough for me to know which is the positive and negative line of the supply so that i can power up the board without having is entire bike, and so i powered the panel...NOTHING...no activity.







 My first visual inspection on the parts, i found out that one of the transistor at the regulator part have BLACK marks on its solder...it means it was burnt by a mistake somewhere by the owner on its motorcycle wiring that causes the panel to FAIL..


If you can see it on the picture TR102 solder, has a BLACK mark, so i immediately test it with my digital diode tester, Im not surprise of the outcome, there..the transistor pins are all shorted. in all probe points.







so I removed the said part, SMD semiconductors are easy to removed by the way if you have two soldering iron, with one a CHISEL point and a pointed one...


Be careful not to damage the foil path..when removing smd parts.









Some Smd semiconductors value are not actually printed on it, others uses MARKING code..so perhaps try to look for some downloadable SMD code cookbook for reference.



The code of this defective transistor is AJ..which is in my cookbook, stands for BCX70J. Since i have too many defective panel boards with parts still use able, just replaced it with a good one.Before i power it up again, i checked every component on the regulator side to see whether there are other damage components, fortunately NONE...so its time.



THERE!!!...it lights up..speedo needle spins and self calibrate, REPAIR DONE!!!














9 comments:

Anonymous said...

There are two pink wires going to the panel of this wave 125...one is from the speed sensor, the other was from the 4th gear panel indicator....the mechanic who used to service the bike actually short the two...that makes the TR102 gone berserk....

Anonymous said...

Sir, any idea what happened sa speedometer nang wave 125 S ko? These are the links:

http://i645.photobucket.com/albums/uu178/mawix_alucard/Motorcycle%20Problem/Wave125problem1.jpg

http://i645.photobucket.com/albums/uu178/mawix_alucard/Motorcycle%20Problem/DigitalMeter2.jpg

Anonymous said...

Please help sir. This is the problem with my wave 125:
http://s645.photobucket.com/albums/uu178/mawix_alucard/Motorcycle%20Problem/?action=view&current=Wave125problem1.jpg

LEI said...

@anonymous....nalubog ba yan..possible all reflective film of the lcd is gone...if that's what happened...it cannot be repaired

full replacement is needed

jhimry ayugat said...

good day sir ,how can i drain the gas in my wave 125? coz im a newbie.please help sir.

Nathaniel Berdan said...

Jhimry use can use two method, the slow method using the carburetor float drain plug (beneath the carb float) or the fast method using the hose before the fuel inlet switch.

the slow method is useful if u do not want to remove your motorcycle body covers..just get at least 4 bottle of LITER SODAS and insert the drain plug hose to it and loosen the screw of the float drain plug.

the fast method need you to remove the front covers and when the carburetor is already visible to you, pull the inlet hose of the carb and put it on the mouth of the soda bottle.

that's it...

Delinger Tomin said...

May bago akong biling speedometer ng wave s then nung kinabit ko nag power on nman may fuel level pumalo din yung needle then nag gear shift ako ng primera nung mag revolution ako para makita if tataas yung needle biglang nag power off as in no display i dont know if na fuse yung speedometer patulong nman po thankyou and Godbless

Eddie Ong said...

Sir ask ko lang po if naa adjust po ba setting ng automated lights on ng honda wave 125 latest model , lagi po kc naka on headlight kahit may araw na. TIA😄

richel john Rabara said...

may i asked is it posible to reset the milage reading of waves 125, mine reaches 99,999.99