Micro-soldering & SMD failure
Those tiny numbers on surface-mount resistors aren't random. Here's how to decode them before you replace one with the wrong value.
24 October 2026 · 4 min read
Related from the bench
First two digits are significant figures, the third is the multiplier (number of zeros). 472 = 47 × 100 = 4.7kΩ. An R marks the decimal point: 4R7 = 4.7Ω.
Same logic with three significant digits, used on 1% parts. 1002 = 100 × 100 = 10kΩ.
Two digits plus a letter. The digits index a table of 96 standard 1% values; the letter is the multiplier. 01C = 100 × 100 = 10kΩ. You need the lookup table — guessing gets it wrong.
A resistor that measures wrong in-circuit may be fine — parallel paths skew the reading. Lift one end or compare against the schematic value before concluding it's failed.
Cluster or sender acting up?
Repair quote after your $227 bench diagnostic. You only pay for what actually needs fixing.
Your $227 bench diagnostic covers inspection, signal testing, a report and repair quote — return shipping included.
$227 diagnostic payment credited in full toward your approved repair.
Overwhelmed? Throw in the towel.
2-hr bench session $227 AUD — fixed in the 2 hrs, it's included. If not, 100% credited.
