The most visible part of a PC is the monitor. Have you ever wondered how a monitor is manufactured? We take you to Samsung’s monitor plant near Delhi to see how it happens.
The process of manufacturing a monitor can be divided into four parts. The first stage is the assembly of the basic components on to a PCB. Stage two is assembling the larger components (transformers, etc) on to this board. At stage three, the picture tube and associated components are added to complete the monitor. In stage four the finished monitor is tested and packed for delivery.
We will take a detailed look at the first stage and a quick one at the second in this issue. In our January 2002 issue we will visit stages three and four.
Sequencer: There are many components (resistors, capacitors, etc) that go onto a PCB. The factory gets them in lots of one kind, like one set of 10 microfarads capacitors, another of 25 and so on. Now one PCB may require two 10 microfarads capacitors, two 25 microfarads ones, etc. The sequencer puts them together in one sequence, after taking them from the individual lots.
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Jumpers: Jumpers are used to connect segments of the circuit that are physically apart on the board. These are metallic connectors that are clipped on to the PCB.
Automatic PCB tester: Checks electrical properties across many points on the board. Each design (of PCB) will have a different testing circuit.
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STAGE I |
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1 |
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Sequencer: takes in lines of similar components
and creates one strip of multiple components
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2 |
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3 |
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Jumper insertion: Jumper is the strip of metallic pins you see going down from top centre |
Eyelet insertion: In the first picture you see one eyelet. Eyelets are drawn into one line on the machine shown below |
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4 |
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5 |
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Axial component insertion: The picture in the back is the PCB after axial component insertion |
GT Pin insertion: If you look carefully at the board, you can see the vertically placed GT pins |
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6 |
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7 |
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Radial component insertion: Components that are placed vertically on the board are inserted now |
Automatic PCB testing jig: PCB is placed between these two halves |
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STAGE II |
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PCBs stacked, ready for PBA line |
After PBA assembly stage 2 is complete |
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Krishna Kumar
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