□
Are there solder bridges on the solder side of the PCB
causing shorts? They are easier to find if you hold the
PCB toward bright light.
□
Are there bad/cold/dry solder joints? Jiggle component
leads at the solder joint with a pair of tweezers. Re-
solder them if any move. If a solder joint looks
suspicious, better rework it just in case.
□
Look if you missed a soldering point. With the USB
model, all pads are used.
21
Summary of Contents for AE20401
Page 23: ...Finished Component Side Finished Solder Side without the LCD LCD Mounting 17 ...
Page 31: ...Operation Functions Menu Structure 25 ...
Page 37: ...31 Example 1 noise Example 2 one signal superimposed on another ...
Page 50: ...Circuit Diagram Part 1 2 44 ...
Page 51: ...Part 2 2 45 ...
Page 63: ... Nr of valid counts depends on range 57 ...
Page 64: ...ASCEL ELECTRONIC www ascel electronic de 2015 ...