No I have never had the need to change the motherboard battery. However that mod is very useful one. Thanks for the information!The CR2032 battery is used in computer motherboards. Have you ever changed the battery in your computer? Moreover, the DS1302 chip has trickle charger for a backup battery.
I am going to bump this old thread in case lurkers (like me) need correct info, to say this guy is absolutely right and to ignore the speedometer section of the first post.Hello,
Thanks for the necessary clarifications on the programming. Really helped me out.
But for the speed settings 0 and 1 I have different thoughts.
0-xxxx for speed. I find 0-0190 to be the right setting.
1-xxxx for mileage. Same setting: 1-0190
I found this setting via mileage. Drive a known distance, read the display distance, calculate deviation, adjust setting, repeat. 420>215>187>195>190.
Speed is same setting. But if you want true mileage and safe speed, you CAN make the display show little higher speed.
With my 18"rim and 1914mm circumference, I cannot find a relation to 16 poles and/or 60 km/h. But the 0190 setting seems accurate.
60000(m/h) / 3600(s) / x * y = value
x = circumference of wheel (in meters)
y = pole pairs of your motor (i.e. 16 for QS273 v3)
thanks for the reply ….it was on and off initially but now totally blank that area ?Internal LCD control chip or connection from it to the LCD is probably defective. You can attempt to fix the connection, but a chip failure is probably not repairable. (unless you can find the identical replacement part and can perform SMT (probably fine-pitch) desoldering and soldering).