OTC DAIHEN FD19 Series Teach Pendant FD19TP-DSJNC Internal Structure & Parts Analysis
In the OTC DAIHEN robot system, the Teach Pendant is the core terminal for human-machine interaction between the operator and the control cabinet. The FD19TP-DSJNC is an advanced teach pendant equipped for the FD19 series control system. The letter at the end of the model number represents the language version of the membrane keypad (e.g., W stands for global universal icons, C for Chinese, E for English, and J for Japanese).
Teach pendants in workshop environments are highly susceptible to damage from accidental drops, collisions, or cables being run over by forklifts. When encountering a shattered screen, unresponsive keys, or communication anomalies (CAN bus faults), it is often necessary to disassemble the housing and replace the internal CPU board, LCD unit, touch screen, or control cable. Please strictly cross-reference the official factory exploded view and parts list below for procurement and maintenance to avoid secondary damage caused by improper disassembly:
📷 Figure 1: OTC DAIHEN FD19 Series Teach Pendant Appearance and Interface
📷 Figure 2: OTC DAIHEN FD19 Series Teach Pendant Detailed Parts Exploded View
2. FD19TP-DSJNC Teach Pendant Internal Core Parts Reference Table
For the convenience of equipment maintenance engineers, we have scientifically reorganized 25 scattered parts into “Housing & Structural Parts”, “Display/Control Core”, and “Communication Cables”. Please strictly cross-reference the circled numbers (①-㉕) in Figure 2:
| System Module | Image Ref. | Official Part Number | Standard Part Name | Function & Maintenance Notes |
|---|---|---|---|---|
| Housing & Structural Parts (Physical Protection) |
① | L23700B01 | Top Cover | Front anti-drop engineering plastic panel of the teach pendant. |
| ② | L23700B02 | Bottom Cover | Rear grip and protective back cover. | |
| ③ | L23700B03 | Hook | Hook for hanging the teach pendant on the control cabinet. | |
| ④ | L23700B11 | TP Strap | Anti-drop hand suspension strap. | |
| ⑤ | 100-3633 | Strap Adjuster | Fastening buckle for strap length adjustment. | |
| ⑥ | 100-3634 | Flange P Fastening Screw | Original factory dedicated anti-vibration fastening screw for housing. | |
| ⑦ | 100-3635 | Flange P Fastening Screw | Original factory dedicated long fastening screw for housing. | |
| Display/Control Core & Keypad (Electronic Computing) |
⑧ | L23700C00 | CPU Board | Core motherboard for computing, bus communication, and control. |
| ⑨ | L23700U00 | LCD Unit | Color industrial-grade liquid crystal display inner screen. | |
| ⑩ | L23700T00 | Touch Screen Unit | Capacitive/resistive touch outer screen covering the LCD. | |
| ⑪ | L23700B12 | Screen Protector | Original factory anti-scratch and anti-spatter surface film. | |
| ㉒ | L23710G00 | Membrane Keypad (Global) | Universal graphic icon version matrix operation keypad. | |
| ㉓ | L23711G00 | Membrane Keypad (Japanese) | Japanese character version matrix operation keypad. | |
| ㉔ | L23712G00 | Membrane Keypad (English) | English character version matrix operation keypad. | |
| ㉕ | L23713G00 | Membrane Keypad (Chinese) | Chinese character version matrix operation keypad (DSJNC). | |
| ⑳/㉑ | NC9608 / NC9638 | Identification Label | Body nameplate and warning sticker. | |
| Internal & External Comm. Cables (Data Transmission) |
⑫ | L23701B00 (FD19RB-3308) | TP Control Cable (8m) | Highly flexible shielded cable connecting the teach pendant and control cabinet. |
| ⑬ | L23701E00 (FD19RB-3315) | TP Control Cable (15m) | Extended highly flexible external communication cable for the teach pendant. | |
| ⑭ | L21500J00 | Internal Cable Assembly | Internal ribbon cable connecting CPU board, keypad, and power supply. | |
| ⑮ | L21500K00 | Internal Cable Assembly | Motherboard data transmission ribbon cable. | |
| ⑯ | L21500L00 | Internal Cable Assembly | Rear Deadman switch connection cable. | |
| ⑰ | L21500M00 | Internal Cable Assembly | Display unit ribbon cable. | |
| ⑱ | L21500N00 | Internal Cable Assembly | Emergency stop (E-Stop) safety circuit connection cable. | |
| ⑲ | L23700P00 | Internal Cable Assembly | Touch screen feedback ribbon cable. |
* Note: The internal precision ribbon cables of the FD19 series are extremely fragile during disassembly. If oxidation occurs due to water or dust ingress, please replace the corresponding cable assembly entirely. Do not use strong acid agents to clean the pins.
💡 FD19 Teach Pendant Overhaul & Electronic Parts Replacement Red Card Warnings:
- Independent Replacement Rule for LCD and Touch Outer Screen: Unlike consumer electronics, the inner screen (
⑨ LCD Unit L23700U00) and outer screen (⑩ Touch Screen Unit L23700T00) of the OTC industrial teach pendant are physically separate components. If an external hard impact causes “shattered glass but the image is still displayed,” you usually only need to replace the outer touch screen (L23700T00). Do not scratch the expensive underlying LCD panel when removing broken glass. Assembly must be done in a dust-free environment to prevent dust from falling into the backlight layer. - Hidden Wire Breakage and Errors in External TP Control Cables (L23701B00 / E00): Approximately 80% of teach pendant black screens, freezes, or communication bus anomalies in the field are not caused by the pendant itself, but by the internal multi-strand shielded wires breaking because this 8m/15m long cable was run over by forklifts, pierced by iron filings, or severely twisted by workers. Before troubleshooting motherboard faults, be sure to use the substitution method to check this cable first.
- Puncture Damage to the Membrane Keypad (L23713G00): Many welders are accustomed to wearing rough work gloves covered in spatter and oil, or even using screwdrivers or ballpoint pen tips to poke the physical keys on the teach pendant. This will directly puncture the polycarbonate membrane, leading to water ingress and short circuits in the internal carbon film matrix (manifesting as a key being continuously pressed and unable to pop up, triggering a safety alarm). When replacing the membrane keypad, adhesive remover must be used to thoroughly clean the residual glue on the bottom shell; otherwise, the edges will easily warp.
🛠️ Get Real-Time Quotes for FD19 Series Teach Pendant Motherboards, Screens, Keypads & Cables
The teach pendant is the “brain and eyes” of the control system. Never use inferior third-party refurbished screens or aftermarket motherboards, as they can easily trigger safety accidents like erratic servo jumping. Simply provide the official part numbers (e.g., L23700T00 Touch Screen, L23700C00 CPU Board, L23701B00 Cable) of the damaged components, and our automated electronic spare parts system will quickly generate an accurate original in-stock quote for you. Feel free to contact us directly: