First, get a piece of PCB, first of all good on paper records vitality of the model parameters , and the location , especially the direction of the diode , three machine direction of the tube , IC gap . The best two photos with a digital camera to shoot vitality position .
The second step, to remove all the devices , and the PAD holes in the tin removed. The PCB clean with alcohol , and then placed in the scanner, start POHTOSHOP, the way the screen surface with a color sweep , and print them out for use.
The third step , water and paper yarn and the TOP LAYER BOTTOM LAYER two minor sanding , grinding to a shiny copper film , into the scanner , start PHOTOSHOP, two color ways were swept into . Note , PCB placed in the scanner must be horizontal tree , otherwise the scanned images can not be used .
The fourth step is to adjust the contrast of the canvas , shading , so that some portion of the copper film and the copper film is no strong contrast , the second figure is then converted to black and white, check the line is clear, if not clear , repeat this step. If clear, the survival of black and white BMP format files TOP.BMP and BOT.BMP.
The fifth step , the two file formats are BMP format files into PROTEL , transferred two in PROTEL , the basic position of the two coincide , such as over- PAD and VIA , indicating that the first few steps to do well, if deviation , repeat the third step.
Sixth, the TOP. BMP converted to TOP. PCB, pay attention to the conversion to the SILK layer , that layer is yellow , then you are in TOP layer scanning line is it, and place the device according to the second step of the drawing . After drawing the SILK layer deleted.
The seventh step , the BOT. BMP converted to BOT. PCB, pay attention to the conversion to the SILK layer , that layer is yellow , then you are in BOT layer scanning lines it wants. After drawing the SILK layer deleted.
The eighth step in PROTEL will TOP. PCB and BOT. PCB transferred , combined into a graph on OK.
The ninth step , using a laser printer TOP LAYER, BOTTOM LAYER were printed onto a transparent film ( 1:1 ratio ) , the film put the piece on the PCB, a comparison is wrong, if yes, you're done .
