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GEETA INSTITUTE OF MANAGEMENT & TECHNOLOGY

KANIPLA (KURUKSHETRA)

Department of Electronics & Communication Engineering

Laboratory Manual

Semester : 8th Subject: Audio Visual Lab Subject Code: ECE-410E

Page No.

Experiment-01

Aim: Familiarization of PCB and mechanical components of a color TV.

Requirements: Training Kit and Accessories.

Circuit Diagram:

Printed Circuit Board

.Color TV PCB

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Double Side PCB

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4. STUDY:

(i) PCBs are used to mechanically support and electrically connect electronic

components using conductive pathways, or traces, etched from copper sheets

laminated onto a non conductive substrate.They are rugged, inexpensive. They are highly reliable. They require much more

layout effort and higher initial cost than either wire wrapped or point to point

constructed circuits. But PCBs are much cheaper, faster, and consistent in high

volume production.

(ii) PCB is a thin plate. On which chips and other electronic components are placed. It

consists of one or more boards, often called, Cards or Adapters. It is available in

various thicknesses. It has Lacquer surface finish. It is a component made of one ormore layer of insulating material with electrical conductors. The insulator is made of

various materials. It is also available in various sizes.

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(iii) CTV PCB: PCBs for color TVs are extensively used to mechanically support andelectrically connect electronic components using conductive pathways, or traces,

etched from copper sheets laminated onto a non conductive substrate. It is also

available in various popular pre set drill sizes.

(iv) Double Side PCB: It is formed in a predetermined design on the surface of aninsulating base in an accurately repeatable manner. It is a double side PCB. Thisdouble side PCB is fabricated by any of several graphic art processes. It increases the

reliability of equipment. It has less porous surface metallization. It enables faster rise

times. The circuits are formed by a thin layer of conducting material deposited, or

"printed," on the surface of an insulating board called, Substrate. The individualelectronic components are placed on the surface of the substrate. These are soldered

to the interconnecting circuits.

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STUDENTS ACTIVITY

5. OBSERVATIONS

6. RESULT

7. VIVA VOCE QUESTIONS

(i) Describe a PCB.

(ii)Why the initial cost of a PCB is large?(iii)List the steps needed to prepare a PCB.

(iv)Give some main mechanical parts of a CTV.

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ASSESS YOURSELF: .

.

ANY SUGGESTION FOR IMPROVEMENT: ..

..

TEACHERs REMARKS: .

TEACHERS SIGNATURE

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