Radio,Television And Electronic Paper 2, WASSCE (SC), 2019

Question 1

 

  1. A customer brings a television set to a Radio, Television and Electronic Works (RTV) workshop for repair, complaining of no picture but sound working normally.

    State:

    1. one business record needed to be completed;
    2. four information required on the record in 1(a)(i).
  2. After taking proper record of the television set in 1(a), the technician prepares the work area for repairs. State two:
    1. stages of the television the technician is expected to troubleshoot;
    2. fault finding equipment the technician is likely to employ;
    3. handtools required to carry out the repair;
    4. safety precautions needed to be observed by the technician.

Observation


The expected answers were:

    1. Repair order form  
    2. Information required on the record in 1(a)(i)
      • Name of owner/customer
      • Model/make of TV receiver
      • Date of receipt
      • Nature/description of complaint/symptoms
      • Probable date of collection/delivery
      • Owners contact/phone number/address
      • Total service charge
      • Amount deposited
      • Amount to be paid on collection/delivery
    1. Stages suspected for troubleshooting
      • Horizontal stage
      • Vertical stage
      • Video stage
      • Picture tube
    2. Fault finding equipment to be employed
      • Oscilloscope/cathode ray oscilloscope
      • Frequency counter/digital frequency counter
      • Television analyzer
      • Logic probe
      • Signal tracer
      • Multimeter           
      • Transistor tester                                        
    3. Handtools required to carry out repair
      • Longnose pliers
      • Solder sucker
      • Desoldering pump
      • Screw driver
      • Soldering iron
      • Desoldering tools
      • Soldering gun
      • File
      • Emery paper
      • Tweezers
    4. Safety precautions needed to be observed by the technician
      • Discharge high voltage capacitors to prevent electric shock
      • Remove cable/chord from power source before opening the back of TV receiver
      • Avoid excessive heat when soldering to prevent damage of components
      • Use the right tool for the right job