Question 7
- List three components in the power section of a mobile phone circuit board.
- 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