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12″ Monochrome CRT Monitor – PHILIPS 3119 208 89859
The 3119 208 89859 is a 12-inch industrial monochrome CRT monitor (“12-inch Monochrome CRT Monitor”) manufactured by Philips, part of the industrial display series used as the operator interface in CNC systems of the 1980s and 1990s. The cathode ray tube features green phosphor (P31), with composite video or analogue TTL input via BNC or D-Sub connector. Compatible with a wide range of CNC controls and industrial systems requiring a standard video signal with progressive or interlaced scanning.
The monitor is the primary visual interface of the CNC control: it displays part programs, status messages, alarms, axis positions and machine data in real time. In case of failure, the operator has no visibility of CNC parameters, making it impossible to start machining cycles, perform diagnostics or any manual setup; the machine is effectively inoperable until the display is replaced or repaired.
Philips is a Dutch multinational founded in 1891, historically active in the production of industrial displays, CRT monitors and visualisation systems for automation and CNC. The Philips industrial display division supplied monitors to major CNC manufacturers including Siemens, NUM, Heidenhain and Bosch. Monochrome CRT monitors of this generation are legacy / discontinued: no longer manufactured or supported by the OEM, available only as used, NOS surplus or through specialist repair.
Main Technical Specifications
| Type | 12″ industrial monochrome CRT monitor (Monochrome CRT Monitor) |
| Part number | 3119 208 89859 (311920889859) |
| Brand | Philips (Koninklijke Philips N.V.) |
| Known application | Industrial CNC systems 1980s–1990s (Siemens, NUM, Heidenhain, Bosch, etc.) |
| Function | CNC operator interface display (programs, machine status, alarms, axis data) |
| Screen diagonal | 12″ (approx. 305 mm) |
| Display type | Monochrome CRT, green phosphor (P31) |
| Resolution | 640×480 px (typical for contemporary industrial CNC displays) |
| Video input | Composite video and/or analogue TTL (BNC / D-Sub connector) |
| Sync | Composite or separate H/V sync (typical) |
| Power supply | 220–240 V AC, 50 Hz (typical) |
| Weight | ~5–8 kg |
| Dimensions | ~320×280×350 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |