GSM Phone Maintenance and Repair Paper 2, WASSCE (SC), 2018

Question 9

 

  1. 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
  2. What is the purpose of carrying out a continuity test?
  3. 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