If you suspect that the error is due to a jig issue, please review the fixture's wiring as follows:
- Poor contact of pin jig (probe pins)
Influence of residual flux on the circuit board
【Countermeasures】
・Cleaning of the circuit board
・Review of probe shape, such as using a rotary probeDirt and wear of probe pins
【Countermeasures】
・Cleaning and replacement of probe pins
Poor soldering at solder joints
【Countermeasures】
・Check whether an ideal fillet has been formed (i.e., whether there are any cold solder joints).
・Check for cracks in the soldered area.
・If there are any poorly soldered areas, repair the soldering.
・If the error rate is high, also check for broken wires.
- Long wiring length
- If the wiring length from the probe hardware (PHX4xx) to the probe pins is long, the signal waveform may become distorted or more susceptible to radiated noise.
【Countermeasures】
・Shorten the wiring length as much as possible. (Recommended to be within 30cm)
・If the signal waveform is distorted, lowering the communication baud rate may reduce the error rate.
・Twist the signal line and GND line to reduce the effects of radiated noise.
・If radiated noise is present, cover the wiring with shielding tubing and connect the shield to ground.
- Review of wiring layout
- Bundling multiple wires together with cable ties can cause induction between adjacent signal lines, leading to crosstalk noise.
【Countermeasures】
・Ensure that the clock signal and data transmission/reception signal lines are not adjacent.