Installation
- Power off CNC machine and verify power is off with multimeter
- Remove 4 mounting bolts from the CRT bezel
- Disconnect the 14-pin or 20-pin cable
- Connect same cable to the replacement LCD module
- Mount LCD using original screw holes (same pattern)
- Power on — no CNC parameter changes required
Total time: ~15 minutes. The LCD draws DC 24V, matching the original CRT power supply.
Full guide: https://cncdisplay.com/brands/OKUMA.html
Technical Details
Key specs for Okuma OSP 5020: connector = 14-pin or 20-pin, power = DC 24V, compatible with OSP 5000, OSP 5020, OSP 7000. The LCD module matches all these specs exactly, making it a direct swap.
The high-pitched whine (15-20 kHz) signals a failing flyback transformer. This component generates the 20-30kV needed for the CRT — when it fails, you get a blank screen.
Cost Comparison: Repair vs Replace
| Option | Cost | Lifespan |
|---|---|---|
| CRT repair (rebuilt HV section) | $229–458 each | 3-12 months |
| CRT repair (donor tube swap) | $329–529 | 6-18 months |
| Used CRT on eBay | $458–687 | Unknown (already aged) |
| LCD replacement module | $229 (one-time) | 5-7 years continuous |
Avoid the CRT repair treadmill. A $229 LCD breaks even on the second repair visit.
Summary
Every Okuma OSP 5000 CRT will eventually fail. Plan the upgrade now instead of scrambling during a production emergency. Details: https://cncdisplay.com/brands/OKUMA.html
