Question 9
- After one hour of connecting a cell phone to a functioning charger, the battery remains uncharged. State two factors that could be responsible for this observation
- What is the purpose of carrying out a continuity test?
- List three types of mobile phone keypads.
Most candidates that attempted this question could not provide the required responses.
Observation
The expected answers are:
(a) Factors responsible for battery not charging
- loose / faulty battery connector
- partial contact of the battery
- faulty battery
- incompatible charger
- faulty power IC
- accumulation of dirt/moisture on battery terminals / connector
- faulty charger
- faulty charging IC
(b) Continuity test is used to determine whether a circuit is open or closed.
(c) Types of mobile phone keypad
- tactile
- qwerty
- flesky
- swift
- simple matrix