User Guide

ManualsBrandsGearwoo ManualsSoldering & Brazing Equipment4-Digital DIY Clock Kits, LED Talking Clock with Speaker, PCB for Soldering Practice Learning Electronics +Transparent Case+ English Instructions, CR1220/CR1216 Batteries are NOT Included

2020/12/17 Voice clock installation tutorial

www.diyleyuan.com/JC/HJ11.html 17/19

All solder joints must be quali

ﬁ

ed, and there must be no dirt (including rosin residue, especially next

to the crystal oscillator, solder paste cannot be used, and the clock time for solder paste soldering

does not run or is not allowed).

Check for short circuits, open circuits, If there is no false welding, make sure there is no problem

before installing the digital tube.