Brand: NEC
Category: Mobile Phone
Document Type: Parts/Service
Language: EN
Parts/Service for DB2000
Uploaded: Nov. 21, 2025, 6:19 p.m.
Manual Publish Date: 1999-01-27
- The service manual for the DB2000 is accessible via the keypad.
- Pressing a number key (e.g., '3') navigates to the corresponding section.
- Hovering over numeric keys displays the section title on the DB2000 screen.
- Sections are presented as articles that can be scrolled.
- Users can switch between article view and full-page view using Acrobat Reader tools.
- Bookmarks can be used to navigate sections and subsections.
- Links within the manual, especially in schematic diagrams, allow for inter-section navigation and magnified views.
- The magnifier tool in the toolbar can be used for zooming in on drawings and diagrams.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
| No power | Battery not charged. | Charge battery. |
| Battery connection loose. | Check battery connection. | |
| No display | LCD contrast setting incorrect. | Adjust LCD contrast. |
| LCD backlight failure. | Replace LCD. | |
| No sound | Speaker faulty. | Replace speaker. |
| Audio circuitry fault. | Refer to circuit description. | |
| Cannot make calls | SIM card not inserted or faulty. | Reinsert or replace SIM card. |
| Network issue. | Check network coverage. | |
| Cannot receive calls | Call barring active. | Disable call barring. |
| Network issue. | Check network coverage. |