Question 4
- What is the difference between a multimode phone and a multiband phone?
- It is observed that a mobile phone cannot power on. List three components on the PCB that could cause this problem.
Candidates’ performed poorly in 4(a) and fairly in 4(b). They could not differentiate between the two terms in 4(a) and could not accurately supply required components in 4(b).
Observation
The expected answers are:
(a) Difference between multimode and multiband phone
A multimode phone operates across different telecommunication technology while a multiband phone works in more than one radio frequency.
(b) Components on a PCB that can cause power failure
- Power switch / ON/OFF switch
- Power IC
- Power amplifier
- CPU
- Battery connector
- Charging port / connector
- Charging IC
- Flash IC
- RAM