Info Manual

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.

It is the end of the line for my shogun 125cc odometer reading which reads 99999.9 and it is been two weeks from now that it was stuck at that reading, and the only way to revert it back to zero is by injecting a new odometer data on its eeprom by using an eeprom programmer and a corresponding software plus an odometer value calculator that will convert any decimal value to hexadecimal that will be manually type to the specific eeprom address on the software window.

Years back, i posted this kind of panel,

what's inside on this link
Speedometer Panel


looking inside the panel will expose of course the entire board of the speedometer. This is digital and care must be consider handling this to prevent problems later on due to static electricity.

moving on

what we are eyeing is the IC with mark IC5 written on the board, that is the eeprom that store value for the odometer reading.