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

Question 10

A mobile phone, order than blackberry, powers ON as soon as the main battery is inserted. State two:

(a) causes of this problem

(b) ways to rectify the problem 

Candidates’ that attempted this question performed fairly.

Observation

The expected answers are:

(a)  Causes of stated phone problem

Any correct 4

- Short circuit on the PCB

- Power switch may be bad

- Short circuit in its USB (caused by dirt or water)

- Phone falling into water/liquids

- Frequent falling of phone

- Short circuit in its charging port

 

(b)Solutions to the problems identified in 10(a)

-washing PCB/USB port with appropriate fluid and dry it

- replace power switch

- clean the dirt / water and flash when necessary

- Avoid frequent falling of the phone

- Avoid phone falling into water/liquid