Fixing A Honda Activa Two Wheeler Speedometer
This Analogue speedometer/odometer which had fuel indicator was brought to me by a regular customer. After handling the digital speedometer of my own TVS Wego two wheeler long back, this is the second time I was handling speedometer. It was his mechanic who told him that the fuel indicator was not working and it can be fixed by only an electronic technician. That’s how it landed on my table.
Though I was skeptical about my role in this, I opened the meter using the skills that I had opening watches, clocks and timepieces during my youth. The method was to carefully pluck out the needles, remove the dial holding screws and open it from the front. Let us have an inside view, which is after removing the coil from its holding screws to the rear:
There were two resistors, out of which one was found burnt, which had a band of green, brown and black followed by gold apart from another red band at extreme end.
The value therefore was 5.1 Ohms.
After removing the burnt resistor and one end of the other resistor, I checked continuity using my Analogue Multimeter (X1 range). I was excited to see the rotor turning clockwise and anticlockwise, when I switched the probes. I just fixed the needle and played with it for a few minutes like a child, recalling my halcyon days! Well, we rarely get such opportunities. As the exact value was not available, I used a 4.7 Ohms with a 0.39 Ohms in series to make the total 5.09
which was close enough. I fixed the dial and needles back and closed the case, deriving satisfaction of a different kind to get added to the collection.
This article was prepared for you by Parasuraman Subramanian from India. He is 74 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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You may check on his previous article on Fixed A Dropped And Broken Computer Speaker Model ALTEC LANSING ACS21W