Temome que a falta de mas datos, no es muy fiable eso de verificar la capacidad de un condensador mediante su tamaño:
All the V3.57 main board's integrated circuits, resistors, caps, etc, are surface mount devices (SMD). The V3.57 main board uses the mostly 0805 SMD footprint for the user assembled devices, but there are also a few 1206 and 2502 sized devices.
En su diseño se han usado estas "3 tallas" cuando ha sido posible, pero da la casualidad de que esos dos tipos de condensador se fabrican en cualquiera de las 3 tallas antes mencionadas respetando caracteristicas de referencias.
0805 2012 .08" x .05" 2.0 x 1.2mm
1206 3216 .12" x .06" 3.2 x 1.6mm
¿No puedes meterle polimetro a ver como canta? ¿O al menos el nonio a ver medidas exactas?
Marivs/Telvm a ver si me aclaro:
En el J1 si no me confundo, tenemos un traductor a onda cuadrada de las curvitas que suelta el VR. Por lo que canta el megamanual con las graficas
Cambiando los cables del VR le damos la vuelta a la pelicula, lo que puede hacer que la MS se fije en el flanco de la onda que no debe.
How do you know which is the correct edge to trigger on? Here are three ways:
1. (Best) Set it up on the bench the way you want to set it up on the car and scope the output. Even then you have to figure out how this will come out when it goes through the VR circuit.(And the MS-II™ and MicroSquirt® circuits are different, to add to the problem). This confusion can be avoided by oscilloscope to observe both the input waveform to the circuit and the output of the circuit that goes to the processor. Then you want to select the polarity of the edge going to the ECU to be that which lines up with the 'most vertical' zero crossing on the VR input side.
2. (Easiest) Go ahead and set the delay tooth, trigger edge and trigger offset under the assumption that the zero crossing trigger will occur when the centers of the sensor and tooth are aligned and this will be what the ECU sees. Then check with a timing light, and if things are not right (i.e. if the timing is off by a long ways, timing changes with engine speed beyond what the timing table dictates, and the timing is 'jittery', you can reverse the polarity on the VR sensor wires (see above), or the change the trigger edge using the software input.
3. Use the tachRef program. This will show what the teeth will look like to the ECU. The wrong polarity will show up as either an extra tooth or erratic spacing of the teeth in the region around the missing tooth section. If polarity is right and the sensor/wheel tooth are matched, you should be able to pick one edge (rising or falling) such that the distances between those edges should all be the same except double(triple) around one (two) missing tooth.
Parece que el jumper ni lo toca de non-inverted y juguetea con los cables salvo raras excepciones:
If you are using another trigger source feeding the VR input circuit (say the EDIS PIP or some Hall sensors) the polarity may need to be changed, this is when they use the other op-amp output (VROUTINV) instead this polarity follows the VR sensor so a negative-to-positive VR sensor yields a ground-to-positive digital output.
¿Ello es asin?