FANUC A05B-2255-C101 Teach Pendant Repair
R-J3iB controller teach pendant — component-level repair for legacy FANUC systems still in production
Keep Your R-J3iB Robot Cell Running
The FANUC A05B-2255-C101 is the standard teach pendant for FANUC robots running the R-J3iB controller. Introduced in the early 2000s, thousands of these units remain in active service across automotive, metalworking, and general manufacturing facilities. FANUC no longer manufactures this pendant, and OEM replacement stock is scarce — when available at all, lead times stretch to months and prices reflect the scarcity.
At TPR, we maintain dedicated component inventory for the A05B-2255-C101. Our technicians have repaired hundreds of these units and understand the specific failure patterns that develop after 15-20 years of factory floor operation. We repair at the component level — replacing individual ICs, capacitors, and connectors rather than swapping entire boards — which keeps your repair cost to a fraction of what a replacement unit would cost.
Every repaired A05B-2255-C101 is tested on our in-house R-J3iB controller setup to verify full functionality before we ship it back to you.
Technical Specifications
| Part Number | A05B-2255-C101 |
| Product Family | FANUC Legacy Teach Pendant |
| Controller | R-J3iB |
| Display | 6.4" Monochrome LCD |
| Input Method | Resistive touchscreen + membrane keypad |
| Cable Connection | Teach pendant cable to controller cabinet |
| Generation | Early 2000s |
| Status | Discontinued — repair only |
Common A05B-2255-C101 Issues We Fix
Our technicians are experienced with the specific failure patterns of the Legacy Teach Pendant series
LCD Degradation & Backlight Failure
After 15+ years of continuous use, the monochrome LCD panel develops fading, uneven brightness, or complete backlight failure. The CCFL backlight tubes in these older units have a finite lifespan and are no longer available from FANUC.
Membrane Keypad Wear
Repetitive use causes membrane keypad contacts to wear out, resulting in unresponsive or intermittent key presses. The deadman switch and E-stop button are particularly prone to mechanical fatigue on units of this age.
Communication Board Failures
Corroded connectors and failed communication ICs cause intermittent disconnections between the pendant and the R-J3iB controller. Symptoms include COMM errors, pendant not recognized, or complete loss of communication.
Boot & Power Supply Issues
Aging capacitors on the internal power regulation circuit cause boot failures, random shutdowns, or the pendant getting stuck on the startup screen. Component-level replacement of failed capacitors restores reliable operation.
Our Repair Approach
We diagnose your A05B-2255-C101 using our in-house R-J3iB controller test rig. Our repair process covers LCD panel and backlight replacement, membrane keypad overlay replacement, board-level component repair (capacitors, ICs, connectors), and full communication testing. We maintain a dedicated parts inventory for this model to ensure fast turnaround even though OEM parts are no longer available.
A05B-2255-C101 Repair Pricing
Every A05B-2255-C101 repair starts with a free diagnostic assessment. We identify the exact fault and provide a transparent quote before any work begins — no surprises, no hidden fees.
Free Diagnostics
No charge for fault assessment
Fraction of OEM Price
Save vs. replacement unit
No Fix, No Fee
Only pay if we fix it
If we determine your A05B-2255-C101 is beyond economic repair, we return it to you with a €100 analysis fee plus transport costs. You are never locked into a repair you don't approve.
Frequently Asked Questions — A05B-2255-C101
Can you still repair the FANUC A05B-2255-C101 even though it is discontinued?
Yes. Although FANUC no longer manufactures the A05B-2255-C101, we maintain component inventory specifically for this model. Our technicians repair at the component level — replacing individual ICs, capacitors, connectors, and LCD panels — rather than relying on OEM module swaps. This allows us to restore full functionality without needing new-old-stock units.
How much does FANUC A05B-2255-C101 repair cost compared to a replacement?
Repair typically costs a fraction of sourcing a replacement A05B-2255-C101 on the secondary market. Since these units are discontinued, replacement prices have increased significantly. We provide a transparent quote after free diagnostics — you only pay if you approve the repair.
Is the A05B-2255-C101 compatible with controllers other than the R-J3iB?
The A05B-2255-C101 is designed specifically for the FANUC R-J3iB controller. It is not directly compatible with newer R-30iA or R-30iB controllers, which use the iPendant series. If you need a pendant for a different controller generation, check our other FANUC model pages or contact us for guidance.
Get Your A05B-2255-C101 Repaired
Register your Legacy Teach Pendant today. Free diagnostics, transparent pricing, and fast turnaround — we'll get your robot cell back online.
We also repair teach pendants from other major brands