Mitsubishi · Drives
MR-J2S-70A — Mitsubishi MR-J2S servo amplifier: fault codes, repair & supply
The MR-J2S-70A is a legacy Mitsubishi MELSERVO-J2-Super general-purpose servo amplifier (discontinued line). Star Automations sources and supplies the MR-J2S-70A and repairs failed units at component level, so you can choose between a replacement and getting your existing unit restored. This is a discontinued OEM line. We source it from global surplus, and advance payment secures your delivery slot. Most quotes come back the same day — send the part number or the fault code on WhatsApp.
Common Mitsubishi MR-J2S fault codes and what we usually find
Fault code wording can differ by firmware and manual revision — always confirm against the manual for your exact unit. The causes below are typical findings, not a diagnosis of your specific unit.
| Code | Meaning | Typical cause |
|---|---|---|
| AL.10 | Undervoltage | Supply dip, rectifier or bus fault |
| AL.12 | Memory error 1 | Internal memory (RAM) fault |
| AL.16 | Encoder error 1 | Encoder cable or encoder fault |
| AL.30 | Regenerative error | Regen resistor or regen circuit fault |
| AL.32 | Overcurrent | Failed power stage, motor or cable short |
| AL.33 | Overvoltage | Regen fault, aged capacitors |
| AL.50 | Overload 1 | Sustained overload, mechanical binding |
When a MR-J2S-70A needs attention
- Alarm on the display at power-up
- Power on but servo will not enable
- Encoder alarm after moving the axis
- Amplifier hot or smelling burnt
- Intermittent alarms that clear with a power cycle
Replace or repair your MR-J2S-70A
Source a replacement
Send the part number. We check sourcing from global surplus and the OEM channel and reply the same day with availability, condition and price. Advance or verified escrow applies.
Repair your existing unit
If sourcing takes longer or you want to keep your configuration, we repair at component level — power stage, gate-drive, control and supply sections — and test before dispatch.
What people look up for the MR-J2S-70A
- MR-J2S alarm 16
- MR-J2S alarm 32 overcurrent
- MR-J2S-70A repair
- Mitsubishi MR-J2S repair India
- MELSERVO J2 Super obsolete replacement
MR-J2S-70A — common questions
Can you supply the MR-J2S-70A in India?
Can a faulty MR-J2S-70A be repaired instead of replaced?
My MR-J2S-70A shows AL.10 (undervoltage). What should I do?
Is the exact part number important?
Need the MR-J2S-70A now?
Send the part number or fault code — we reply the same day. Serving Chennai, Puducherry, Bengaluru, Hyderabad, Delhi and pan-India.