GSM Phone Maintenance & Repair Paper 2, May/June 2014  
Questions: 1 2 3 4 5 6 7 8 9 10 11   Main
General Comments

Question 9

 (a) State the function of electrostatic discharge (ESD) in a mobile phone workshop
                        (b) A phone was discovered to vibrate only and not ring out.  State four causes of this problem.


This was not a popular question among the candidates.  Performance was poor.  Most candidates were unable to state the function of the electrostatic discharge (ESD) in a phone workshop. It appears most candidates do not know what ESD is.  Part (b) was poorly handled.
The expected answers are:
                        (a)        ESD prevents the technician from receiving electric shock in the workshop                                     when worn
                        (b)        Any correct 4
                        e.g.      -           The ringer is bad
                                    -           Need to re-align the ringer i.e. bad contact with PCB
                                    -           Phone set to silent mode
                                    -           Phone set to vibration only
                                    -           Phone set to the lowest volume
                                    -           Line bus broken
                                    -           Component(s) serving the ringer is/are bad/disconnected
                                    -           The ringing tone may be empty/corrupt

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