GSM Phone Maintenance and Repair Paper 2, WASSCE (SC), 2018

Question 8

 

  1. List the steps involved in using a multimeter to check the status of the mouthpiece of a mobile phone
  2. What is the resistance range of a functional mouthpiece?
  3. Name two tools required for troubleshooting and repairing a faulty mouthpiece.

 

Observation

The expected answers are:

        Most candidates performed poorly in this question. They could not list the steps required in 8(a) and could not state the resistance range of a functional mouthpiece as required in 8(b). In 8(c), candidates again showed inability to distinguish between materials and tools.

 

8(a) Steps involved in using a multimeter to check the status of a mobile phone mouthpiece

  • Plug the red and black probes into the appropriate socket on the multimeter.
  • Set the multimeter to the appropriate resistance range
  • Connect the probes to the terminals of the mouthpiece
  • Check the resistance value on the display                         

(b) Resistance range of a functional mouthpiece is (19 – 23) Ω                                                 
(c) Tools for troubleshooting and repairing mouthpiece

  • screwdriver
  • soldering iron
  • multimeter
  • rework station
  • tweezers