ASSOCIATION OF COMMUNICATION ENGINEERING STUDENTS
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ASSOCIATION OF COMMUNICATION ENGINEERING STUDENTS

DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING, YESHWANTRAO CHAVAN COLLEGE OF ENGINEERING, NAGPUR, FORUM FOR CURRICULAR, COCURRICULAR ,EXTRACURRICULAR AND SOCIAL DISCUSSIONS.
 
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 THE POINT OF PRODUCTION

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rajeev



Posts : 8
Join date : 2009-08-12
Age : 29
Location : nagpur

PostSubject: THE POINT OF PRODUCTION   Sun 23 Aug 2009 - 1:26

Assembly procedure

Below the attention point that you assemble the circuit.


The jumper wiring that is hidden by the parts is attached in advance.

Naturally, the jumper wiring that passes under the parts( e.g. Under the IC socket ) is attached in advance.
Later it is not attached.

The assembly of the circuit board is done to the left from right, or to the right from the left.

The parts are not mount on the circuit board at a time. It mounts and assembles one each.
This is to assemble without mistaking the interval of the part and part. And it is to secure the space where attaches the part.

It attaches from the short part.

When the tall part is attached first, the short part becomes difficult to attach.
The electrolytic capacitor or transistor is tall part, the resistor or diode is short part.

One part is mounted, then you do the soldering.

Soldering is done to fix the part.
But wait a moment to sloder the all component leads.

If the part is mounted, you solder the wiring between the parts together.

The turn needs to be considered of soldering of the component lead.
When it mistakes, the hole of the circuit board that passes the component lead of the part by soldering has been closed.
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rajeev



Posts : 8
Join date : 2009-08-12
Age : 29
Location : nagpur

PostSubject: Re: THE POINT OF PRODUCTION   Sun 23 Aug 2009 - 1:44

Attention when the part mounting

There is the direction where the part mounts that it depends on the part.

Electrolytic capacitor/Tantalum capacitor
The electrode of minus and the electrode of plus are decided.[Polarised]

Diode
Pay attention to the direction of the anode lead and the cathode lead.

ICs

Pay attention to the direction of mounting.
In the case of DIP, it becomes a turn from the 1st pin from the left to the right on the side of under seeing from the top and the mark of the hollow is done left.
The upper side becomes from a young No.(right) to an old No.(left). The counterclockwise number is attached.
In the case of pattern drawing, it assumed that you see it from the wiring side (the reverse side) of the circuit board. Then the attention is necessary, because the right and the left are sometimes mistaken.

Transistor
In the case of type such as 2SC1815, that the center lead is a collector understands right away.
But sometimes the base lead and the emitter lead conversely.

Three terminals voltage regulator
In case of 78L type, the center lead is a ground understands right away.
But sometimes the input lead and the output lead conversely.
In case of the other type like 79L, 78xx or 79xx, the pin connection is different. So, you must check with the data sheet.

Light Emitted Diode
There are many cases anode lead and cathode lead do not understand.
The long lead is a anode side( connect to plus voltage ) in the case of a new article.
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THE POINT OF PRODUCTION
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