Download TSLC in Electronics Engineering, (Revised, 2014)

Task: 30 Repair calculator
Steps
1. Test the unit to be repaired and
diagnose the faulty section.
2. Check battery
3. Replace battery
4. Dismantle the unit
5. Identify faulty card
6. Measure test pin voltage of unit
7. Identify faulty components.
8. Replace faulty card /components by
right one.
9. Test unit for normal operation.
10. Assemble unit in the enclosure.
11. Perform final test of particular unit.
12. Perform required adjustment
13. Store tools and equipment in proper
place
Terminal performance
objectives
Condition (Given):
• Faulty calculator
• Circuit diagram
• Assortment of the
component used in
Calculator
• Tool set
• Fully equipped electronic
workshop.
Tasks (What):
• Repair and maintain
calculator
Time:- 4 hrs
Theory:- 1 hr
Practical:- 3 hrs
Related Technical
Knowledge
Calculator
• Definition
• Types
• Principle of
operation
• Circuit diagram
• Trouble shooting
procedure
• Operating
procedure
• Advantages
• Application
• Safety precautions
Standard (How well):
• Unit dismantled without
further damage
• Components replaced
correctly
• Calculator repaired
correctly with normal
function
Tools and Materials:- Multi meter, soldering iron with stand, de-soldering pump, soldering
leads, soldering paste /flux, wire cutter, wire stripper, screw driver
set, nose pliers, tweezers and AC mains socket
Safety:References:
• Lab manual
• Circuit diagrams
• Internet explore
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