GSM Phone Maintenance and Repair Paper 2, WASSCE (SC), 2017

Question 7

 

    1. List three components in the power section of a mobile phone circuit board.
    2. State one function of each of the components listed in 7(a)

This question required an understanding of identification of components on the main board of a mobile phone. Performance of candidates in this question was fair.

 

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Observation

The expected answers are:

        (a) Components of the power section of a mobile phone

  • ROM
  • RAM
  • Flash IC
  • Power IC
  • Charging IC
  • CPU
  • Audio IC                                                                                       

       (b) Functions of the components listed in 7(a)

 

  • ROM: loads current operating program in a phone
  • RAM: sends and receives commands of the operating program in a phone
  • Flash IC: houses the software of the mobile phone
  • Power IC: takes power from the battery and supplies to all other parts of the phone
  • Charging IC: takes current from the charger and charges the battery
  • CPU: controls all sections of the mobile phone
  • Audio IC: controls speaker and microphone of a mobile phone