FANUC A61L-0001-0093 Display FAQ Solutions

Q1: No Display at All

FANUC A61L-0001-0093 LCD Display Replacement —Symptoms: Screen completely black, no power indicator light.

Possible Causes:

• Power supply failure (no 24V DC input)
• Blown fuse (usually 2A/250V slow-blow)
• Mainboard damage (power board failure)
• Power cable disconnection or loose pins

Solutions:

1. Check input voltage with multimeter (should be 24V DC 卤10%)
2. Inspect and replace fuse if blown (check for short circuits first!)
3. Test power board output voltage
4. Replace power board or mainboard if faulty
5. Check HONDA 20-pin connector pin 1&2 for 24V DC

Q2: Dim or Dark Display

Symptoms: Image barely visible, very dark screen, needs warm-up time.

Possible Causes:

• CRT aging (filament emission decreased by 50%+)
• High-voltage section failure (no high voltage output)
• CRT phosphor layer aging (brightness reduced)
• Focus/grid voltage adjustment drifted

Solutions:

1. Check brightness settings in FANUC parameters (if applicable)
2. Measure high-voltage output (should be 15-25kV)
3. Listen for high-pitched whine (indicates HV section working)
4. CRT replacement not economical →?Consider LCD upgrade
5. Kongto LCD upgrade kit provides instant-on, bright display

Q3: Distorted or Discolored Image

Symptoms: Colors incorrect, ghosting, flickering, image not clear.

Possible Causes:

• HONDA 20-pin connector loose or oxidized pins
• Signal cable damage (broken wires inside cable)
• CRT electron gun aging (color purity deteriorated)
• EMI interference from nearby equipment
• CRT convergence problem (image not sharp)

Solutions:

1. Power off CNC system, re-seat HONDA 20-pin connector
2. Inspect cable for broken wires or damaged pins
3. Clean connector pins with contact cleaner (isopropyl alcohol)
4. Add ferrite cores to signal cables (reduce EMI)
5. Route signal cables away from power lines (min 30cm separation)
6. Replace signal cable if damaged
7. For CRT convergence issues: Not repairable →?Upgrade to LCD

Q4: Flickering Screen

Symptoms: Screen flickers intermittently, unstable image, eye strain.

Possible Causes:

• CRT filament aging (emission unstable)
• High-voltage section unstable (HV arcs or regulation problem)
• Loose power connection (vibration-related)
• Voltage fluctuation (below 21.6V or above 26.4V)

Solutions:

1. Check input voltage stability (should be 24V DC 卤10%)
2. Secure all power connections with cable ties (anti-vibration)
3. Check for overheating (ventilation blocked?)
4. Install voltage stabilizer if power supply unstable
5. Flickering is sign of CRT end-of-life →?Upgrade to LCD (no flicker)

Q5: Touch Screen Not Working (if equipped)

Symptoms: Touch screen unresponsive or inaccurate (for touch-equipped A61L-0001-0093).

Possible Causes:

• Touch controller board failure
• Touch panel surface damage or contamination
• Calibration lost (needs re-calibration)
• Touch panel disconnection (ribbon cable loose)

Solutions:

1. Re-calibrate touch screen in FANUC settings (parameter adjustment)
2. Check touch panel connection cable (ribbon cable)
3. Clean touch screen surface (soft cloth, mild detergent)
4. Replace touch controller board if faulty
5. Replace touch panel if damaged (requires complete disassembly)

Q6: When to Consider LCD Upgrade

Consider LCD upgrade when:

• Display is 12+ years old (typical CRT lifespan is 10-15 years)
• Repair costs exceed 50% of upgrade kit price
• CRT replacement parts unavailable or very expensive
• Frequent display failures affecting production (downtime costs)
• Image quality no longer acceptable for precision work
• Flickering causes operator eye strain or fatigue

Benefits of LCD Upgrade:

Feature	CRT (Old A61L-0001-0093)	LCD (Kongto Upgrade)
Resolution	640×480 (VGA)	1024×768 (XGA)
Power Consumption	60-80W	15-20W (70%+ energy savings)
Weight	8-12 kg	3-5 kg (60%+ weight reduction)
Lifespan	10-15 years	15-20+ years
Warm-up Time	2-5 minutes	Instant-on (0 seconds)
Image Stability	Flicker (50/60Hz)	No flicker (stable image)
Brightness	Degrades over time	Stable brightness (LED backlight)

Q7: LCD Upgrade Process (Kongto Kit)

1. Power Off: Shut down CNC system, disconnect main power, wait 5+ minutes for CRT high-voltage discharge
2. Remove Old CRT: Unbolt CRT from mounting brackets, disconnect HONDA 20-pin connector, carefully remove CRT (heavy! 8-12kg)
3. Install LCD Panel: Mount LCD panel using provided bracket (matches original CRT mounting holes exactly)
4. Connect HONDA 20-pin: Plug HONDA 20-pin connector into LCD controller board (plug-and-play, no wiring modification)
5. Test: Power on CNC system, verify display works correctly, check image clarity
6. Secure Installation: Tighten all mounting screws, route cables neatly with cable ties

Installation Time: 30-60 minutes (vs 2-3 days for CRT replacement)

Tools Required: Phillips screwdriver, pliers, multimeter (for voltage verification)

Q8: Prevention Tips

• Regular Cleaning: Clean dust from ventilation openings every 6 months (compressed air recommended)
• Voltage Monitoring: Install 24V DC surge protector to prevent power spikes (CRT very sensitive to voltage spikes)
• Proper Grounding: Ensure display and CNC system properly grounded (resistance < 1惟)
• Cable Management: Secure cables with cable ties to prevent strain on HONDA 20-pin connector (vibration protection)
• Environmental Control: Maintain temperature 0-40°C, humidity 20-80% RH (CRT performance degrades in high humidity)
• Preventive Maintenance: Schedule annual inspection by qualified technician (check voltages, connections, image quality)
• Avoid Impact: Do not place heavy objects on display, avoid physical shocks (CRT glass is fragile)
• Upgrade Consideration: If display is 12+ years old, proactively upgrade to LCD (avoid unexpected failure during production)

Kongto Technology A61L-0001-0093 LCD Upgrade Kit

Kit Includes:

• 10.4" Industrial LCD Panel (1024×768 resolution, LED backlight)
• LCD Controller Board (HONDA 20-pin compatible, plug-and-play)
• Mounting Bracket (matches original CRT mounting holes exactly)
• Installation Manual (English/Chinese)
• 18-Month Warranty (extendable to 3-5 years)

Technical Specifications:

• Input Voltage: 24V DC 卤10% (compatible with original CRT power)
• Power Consumption: 15-20W (vs 60-80W CRT)
• Operating Temperature: -20°C to +70°C
• MTBF: 鈮?0,000 hours (vs 10-15 years CRT)
• Signal Interface: HONDA 20-pin (compatible with FANUC 0i/16i/18i)

For professional LCD upgrade solutions, technical consultation, or to order upgrade kit, contact Kongto Technology:

• Email: [email protected]
• Phone: +86 13686889647
• Website: https://cncdisplay.com/