FANUC CRT to LCD Upgrade Complete Guide
Applicable to FANUC 0i/16i/18i series CNC systems
1. Why Upgrade? — CRT vs LCD Comparison
| Feature | CRT (Cathode Ray Tube) | LCD (Liquid Crystal Display) |
|---|---|---|
| Size & Weight | Bulky, approximately 3-5 kg | Ultra-thin, lightweight (~0.8 kg), direct replacement |
| Power Consumption | 80-120W (high-voltage supply) | 10-15W (low-voltage DC) |
| Brightness & Viewing Angle | Affected by ambient light, narrow angle | 400+ cd/m², 178° wide viewing angle |
| Lifespan | ~10,000 hours, prone to burn-in | 50,000+ hours, burn-in resistant |
| Maintenance Cost | Vacuum tube aging, high-voltage repair needed | Modular design, extremely low failure rate |
| Environmental | Contains lead, mercury, and other hazardous materials | RoHS compliant, environmentally friendly |
| User Experience | Color distortion, low contrast | Vivid colors, high contrast, faster information reading |
Conclusion: Upgrading to LCD significantly reduces energy consumption, improves operator comfort, extends equipment lifespan, and meets modern environmental requirements.
2. Technical Principles
2.1 Signal Conversion
Original FANUC CRT displays use a HONDA 20-pin analog signal interface. The LCD display's internal signal bridge chip (e.g., ADI ADV7511) converts the analog signal to LVDS/TTL digital signals in real time to drive the LCD panel.
2.2 Power Compatibility
The original CRT uses 24V DC low-voltage power (fed to the high-voltage conversion module). The LCD uses 24V DC directly, with an integrated DC-DC buck converter outputting 5V/12V for the driver board and backlight. No power wiring modifications needed.
2.3 Dimensional Compatibility
The LCD features identical mounting holes and outer dimensions as the original CRT (approximately 150mm x 120mm), enabling a "drop-in replacement."
3. Installation Steps
Required Tools: Phillips screwdriver, torque wrench (≤5 Nm), anti-static wrist strap, cleaning cloth, 70% isopropyl alcohol
| Step | Key Operations | Important Notes |
|---|---|---|
| 1. Power Off & ESD | Turn off CNC machine main power, disconnect display power cable; wear anti-static wrist strap and ground it. | Verify all power indicator lights are off to prevent residual high voltage. |
| 2. Remove Original CRT | Loosen 4-6 mounting screws (varies by model). Carefully disconnect the HONDA 20-pin signal cable and 24V power cable. | Pull connectors straight out to avoid damaging latch mechanisms. |
| 3. Clean Mounting Surface | Wipe the original bracket and enclosure contact surface with alcohol cloth to remove oil and dust. | Do not use corrosive solvents that may damage metal surfaces. |
| 4. Install LCD | Align the FANUC A61L-0001-0093 LCD with the original mounting holes. Press gently on all four corners until clips lock automatically. | Ensure LCD is fully seated on the bracket to avoid signal contact issues from tilting. |
| 5. Connect Cables | Insert the HONDA 20-pin connector (align direction marker "1"). Connect the 24V DC power cable (red/black polarity same as original CRT). | Ensure connectors are fully seated to prevent vibration-induced disconnection. |
| 6. Secure Screws | Use torque wrench to tighten screws to 4-5 Nm. Over-tightening may crack the panel. | Keep threads clean, avoid metal shavings entering the display. |
| 7. Power-On Test | Enter FANUC System → Parameters → Display Settings, confirm resolution is 800x600 (or system default). If display is abnormal, recheck signal cable connections. | Observe for 5 minutes on first power-up to confirm uniform backlight and color. |
4. Product Recommendation: FANUC A61L-0001-0093 LCD
| Feature | Description |
|---|---|
| Dimensional Compatibility | 100% match with original CRT mounting holes and outer dimensions, no machine structure modification required |
| Plug-and-Play | HONDA 20-pin signal interface, compatible with FANUC 0i/16i/18i systems, zero programming |
| Power Compatibility | DC24V power supply, uses original CRT power directly, no rewiring |
| Industrial-Grade Reliability | Operating temp -20°C to +60°C, MTBF ≥ 80,000 hours |
| IP65 Protection | Front panel waterproof and dustproof for harsh workshop environments |
5. Frequently Asked Questions
Q: Will the LCD affect the CNC system's G-code display?
A: No. The LCD is a direct replacement for the CRT with identical signal processing. All G-code, M-code, and system parameter displays remain unchanged.
Q: How long does installation typically take?
A: For experienced technicians, 30-45 minutes. First-time installers should allow 1-2 hours.
Q: Can I revert to the original CRT if needed?
A: Yes. The LCD is a non-destructive replacement. Simply swap back the original CRT and reconnect the cables.
For product inquiries and installation support, contact Kongto Technology at szkongto01@foxmail.com