Speedometer Main Board Refurbishment Service – Mazda RX-7 (FD3S)
Professional refurbishment of the speedometer main PCB for the RX-7 FD3S. We inspect, diagnose, and replace failed/aged parts (electrolytics, regulators, diodes, resistors, crystal, driver ICs) to restore stable power rails and proper speedometer signal conditioning.
Exception: If the MCU (microcontroller) itself is faulty, we return your unit free of charge (no service fee).
Common issues addressed
No speed/odometer reading, flicker, intermittent behavior
Unstable voltages / reset loops
Leaking/high-ESR capacitors, localized corrosion
Failed protection diodes/regulators after over-voltage events
Cold joints, cracked connectors
What’s included
Incoming inspection & diagnostics (visual, electrical, measurement log)
Replacement of defective/aged components with automotive-grade parts where applicable
Cleaning & rework (electrolyte residue removal, corrosion treatment, joint reflow)
Bench test under load (power rails, signal paths)
Work report listing replaced parts
Notes
MCU failure: Not repairable within this service → free return shipping, 0 € service fee.
Odometer/EEPROM is not altered; I’ll contact you if the EEPROM is suspect.
Severe water damage may require extra work; I’ll confirm any costs before proceeding.
Scope is electronics main board only (no mechanical/cluster housing repairs).
Process
Place order in the shop.
Ship your speedometer main board (or full cluster) well-padded to my workshop.
Refurbish & test on the bench.
Insured return shipping to you.
(Work starts after the unit arrives; see checkout for shipping options.)
Warranty / Terms
Functional warranty for replaced parts: 24 months
Invoice with parts list.
