I'm starting my blog with assalamualaikum and salam satu Malaysia.

Firstly, I'm gladly thankful that been chosen to involve in internship program at this HIIS company. After what I through in my previous company, I hope this company will help me to expose working environment that will help do my internship program and related with my course of my studied. From what I saw in the schedule that Mr. Mazran plan to us, I will absorb that the objective of our training will be archived. 

Task schedule

Task	Member	Duration (week)
1.      Solar and Switching 2.      Microcontroller: -PCB/Soldering -Sensor Vibration -sensor sonar -GSM Modem	Parallel	1 – 4
PLC (GSM Modem)	Prerequisite: BENT	3 – 5
IP Camera ( 2 Set )	Divided 2 person per group
Mechanical Prototype (PLC / PIC )		6 - 10
Visual Basic	Website team	5

     

July 6^th, 2012

First day in UTeM Holding. We been briefing about our task by Farhan Bin Roslan about SMD (surface mount device). Then we try to practical it with the equipment and component that been given. The equipment are:

1. Solder Iron
2. Solder Paste
3. TGK-493 anti-static absorber (ionizer)
4. Tweezers
5. solder leads
6. Gripped board                                                                                                                               

And the components that will be solder it:

1. Power and reset button
2. 2 x GA 12 diode
3. PW LED and LED_C4
4. Resistor 2.2KΩ , 2 x 330Ω , 2 x 10kΩ   
5. Printed Circuit Board (PCB)
6. Capacitor 5 x 61µ 3

Surface Mount Soldering Process

Before starts to soldering process, we must know the procedure of surface mount components. Where the standard of staking adhesive which is acceptable, process indicator and defect with following Class 1, 2, 3 at the proper side. A good eye, a steady hand and a soldering iron with a small, clean tip are required.

First step:

-          Apply a small bead of solder to one of the PCB pads for the component to be installed.

-          The bead must be approximately 0.020 to 0.030 high.

Second step:

-          Using a pair of tweezers, pick up the component to be installed and place it over the appropriate pads.

-          With the part in position, move the soldering iron to the solder bead on the PCB pad.

-          Apply a small amount of heat from the iron to flow the bead, simultaneously lowering the part against the board and correcting for any rotational misalignment.

Third step:

-          Remove the iron and allow the solder to cool.

-          Inspect the joint. At this point, we just concern about the position of component and not the quality of the actual solder joint.

-          From the inspection, it must pass of class 1, 2, 3 standards.

-          The part should be flush against the PCB, with both ends properly contacting the pads.

-          The part should be straight, and centered between the two pads.

Forth step:

-          After third step end is soldering, go back to the original solder joint and reheat the solder.

-          The flux will allow the solder to flow freely and good fillet should be observed.

-          Add a little solder if it seems to be insufficient at solder joint.

Inspection from Mr. Mazran

            After we done surface mount device soldering. The work should be inspect to Mr. Mazran before continue the next process. Mr. Mazran will comment my work and give a useful advice to get a better work for the future.

Safety precaution

During the soldering process we must follow this precaution to avoid being an accident during work.

1.      Make sure that the shouldering iron is proper heat before do soldering process.

2.      Avoid touch the wetted flux and rod iron.

3.      Avoid smelling the smoke that come out from the soldering process and to avoid it, use anti-static absorber that can absorb the smoke and it filtered to the air.

4.      Always open the window during works.

5.      Make sure to turn off after use it to avoid in waste energy and accident.

6.      Use proper equipment which may cause of wound.

7.      To protect the component, don’t attach the iron to long at the components.