Heidenhain TNC 351 / TNC 355 Service Manual β Diagnostics & Repair PDF
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Factory Service Manual for Heidenhain TNC 351 & TNC 355 CNC controllers. Includes error messages, logic unit troubleshooting, processor board testing, I/O interface diagnostics, machine parameter setup, RS-232 communication configuration, analog output calibration, and full wiring & connection diagrams. High-quality searchable PDF. Instant download.
Description
Heidenhain TNC 351 / TNC 355 Service Manual β Diagnostics & Repair PDF DOWNLOAD
Description
This official Heidenhain service manual provides complete hardware-level diagnostics and repair procedures for the TNC 351 and TNC 355 CNC control systems, found on many European and Asian milling machines, machining centers, and retrofitted CNC platforms.
It is a true engineering service document, not just an operator or programming manual β meaning it covers fault tracing, signal testing, board component identification, and service-level parameter configuration.
Ideal for:
CNC repair technicians
Retrofit & maintenance engineers
Machine shop service departments
Electronic control board refurbishers
Industrial equipment support engineers
Table of ContentsΒ
| Section | Topics Covered |
|---|---|
| 1. How to Use the Service Manual | Technician workflow & signal tracing |
| 2. Error Messages | System error causes & response logic |
| 3. Fault Messages & Troubleshooting | Step-by-step corrective procedures |
| 4. LOGIC Unit LE 351 / 355 | Board variants, component location maps |
| 4.1 Processor Board | Microprocessor architecture & bus control |
| 4.2 CLP Processor Board | PLC execution & sequencing behavior |
| 4.3 Connector Layouts | Pinout tables & signal direction maps |
| 5. Voltage & Power Rails | Required operating voltage checks |
| 6. Memory & Program Backup | Backup/restore sequences |
| 7. Diagnostics & Self-Test Mode | Built-in service-level test functions |
| 8. Machine Parameter Setup | MP configuration & behavior logic |
| 9. External I/O Signals | CNC <> machine tool interface mapping |
| 10. RS-232 / V.24 Data Interface | Baud rate, cable wiring, printer I/O |
| 11. External Data I/O | Remote program upload/download |
| 12. Analog Output Control | DAC channels & tuning procedures |
Key Technical Coverage
Error message matrix with root cause & corrective action
Board-level signal flow diagrams
Connector pinouts & wiring schematics
Processor & memory diagnostics
Machine parameter access & protection
Serial communication setup (ME / FE / EXT)
Analog output signal calibration
File Details
| Item | Details |
|---|---|
| Manual Name | Heidenhain TNC 351 / TNC 355 Service Manual |
| Models Covered | TNC 351, TNC 355 (all hardware variants) |
| Format | PDF (Fully Searchable / Printable) |
| Pages | ~121 pages |
| Quality | Clear OEM Scan, Text OCR |
| Language | English |
