Quote:
Originally Posted by michael cole
there are 2 #s on the box 004 545 2432,412 205/7/8 production date 12/87.i have done no soldering on this board except for changing the caps.the speedo shows nothing unusual.i tried to measure the output of the hall sensor at the amplifier whilst the car was at rest no voltage either ac/dc but as i drove the car a voltage seem to be generated but a precise reading was difficult.i assume because my DVM is limited.thanks for your help so far
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The part number is correct for the 300TDT.
It sounds like your hall-effect is working, at rest nothing is generated as it will only generate when the speedometer cable spins. It will show a varying number as the cable will spin relative to the car's speed.
Try using some stripper and remove the conformal coating on the PCB, then solder every contact point.
When you installed the capacitors, did you be sure to observe proper polarity?
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