1, component identification and testing
Time limit is 30 minutes, 15 minutes.
ingredient
Identify and detect content
(to be completed by the candidate)
divide
grade scale
score
Resistance branch
Nominal value:
Measured value:
Measuring device:
1 point
Detection error 1, resistance does not score.
Three capacitors
Nominal value:
1( ) , 2( ) ,3( )
Media: 1( )2( )3 ()
Quality judgment: 1( )2( )3 ()
Every 1 minute, ***3 points.
There are four kinds of quality judgment: available, open circuit, short circuit and electric leakage. If the detection error is 1, the capacitor does not score.
Diode branch
Draw the outline of the part to be measured, and indicate the cathode and anode:
1 Pipeline outline drawing: 2 Pipeline outline drawing:
Forward pressure drop: 1( )2 ()
Measuring device:
Quality judgment: 1( )2 ()
2 points each, ***4 points.
Quality judgment can be divided into four types: usable, large leakage current, breakdown and open circuit. 1 item was detected incorrectly, and 1 point was deducted.
Light emitting diode branch
Draw the outline of the part to be measured, and indicate the cathode and anode:
Forward conduction voltage: ()
Measuring device:
Quality judgment: ()
2 points
Quality judgment can be divided into two types: available and unavailable. 1 item was detected incorrectly, and 1 point was deducted.
Two branches of triode
Draw the outline of the part to be tested and mark the stitches:
1 Pipeline outline drawing: 2 Pipeline outline drawing:
Measuring device:
Type: 1( )2 ()
Current magnification: 1( )2 ()
Quality judgment:
2 points each, ***4 points.
Quality judgment can be divided into four types: usable, large leakage current, breakdown and open circuit. 1 item was detected incorrectly, and 1 point was deducted.
loudspeaker
Measuring device:
Quality judgment:
1 point
Quality judgment can be divided into three types: damaged, incorrect resistance and usable. 1 item was detected incorrectly, and 1 point was deducted.
Appraiser: July 2009.
2. Assembly of the whole machine: 180 minutes, 60 minutes.
Evaluation content
Operation content
technical requirement
divide
grade scale
score
Assembly preparation
Read technical documents
Read the installation drawing of the whole machine.
Can read the installation drawing of the whole machine.
2
You can't score if you can't read the reader.
Read the schematic diagram of the whole machine.
Be able to read the position of components in schematic diagram.
three
You can't score if you can't read the reader.
Prepare electronic components, 15 minutes.
Count the number of complete sets of equipment and materials.
Be able to count the quantity of complete equipment materials according to the bill of materials.
2
After the deadline, the material shortage will be deducted 1 minute until the deduction is finished.
Test material quality
Test the reliability of components, and reissue and replace components if problems are found.
three
After the deadline, each damaged material will be deducted 1 minute until the deduction is finished.
Printing plate plug-in
Component pin processing and wire processing
Component pin processing, wire stripping, tin plating.
The processing size and molding of the contact pin should meet the requirements of the assembly process, the length of the conductor and the length of the stripping head should meet the technical requirements, the core wire should be intact, the twisted head should be tinned, and the cable arrangement should be reasonable.
five
After final assembly and welding, the finished products shall be inspected, and 0.5 points shall be deducted for each piece that does not meet the processing size, plastic bending and process requirements, and 0.5 points shall be deducted for each piece that tears too many cables.
Position and polarity
Read the polarity of the electronic component.
The wiring position is correct, and the polarity of components shall not be reversed.
10
0.5 points will be deducted for each component that is wrongly installed, omitted or damaged by operation.
Insertion technique
Direction and height of color ring and character mark
Process requirements shall be met.
five
0.5 points will be deducted for each piece that does not meet the process requirements.
Printed board welding
welding spot
welding technology
The size of solder joint is moderate, and there is no virtual welding, missing welding and continuous welding. The solder joint is smooth, clean and free of burrs.
10
Do not meet the requirements of solder joints, 0.5 points each.
final assembly
Total assembly quality
Mechanical assembly of the whole machine
Shell, keys, speakers, microphones, display screens, printed circuit boards, etc. All meet the requirements; Fasteners are installed reliably and firmly; The whole machine is clean, free of dirt, burns and scratches.
10
Unqualified deduction 1 minute for each installation.
Assembly time
The time limit from the distribution of assembly materials to the final assembly is 180 minutes.
10
Overtime 1 minute will be deducted 1 minute until the deduction is finished. The timeout limit is 10 minute.