Brand: SIEMENS
Category: Mobile Phone
Document Type: Manual
Language: EN
Manual for C25 / C2588
Uploaded: Nov. 21, 2025, 9:16 p.m.
Manual Publish Date: 1999-02-01
The Siemens C25 and C2588 are dual-band mobile phones operating on GSM 900 and GSM 1800 networks. The C2588 is a special version for the Asian market with a graphical display. This manual provides service information for repairs up to level 2. It covers mechanical concepts, hardware descriptions, software programming, battery information, accessories, and troubleshooting for specific components like the display, ringer coil, and keypad LEDs. Disassembly and reassembly instructions are detailed with accompanying images. Attention is drawn to ESD regulations and proper handling of components.
Troubleshooting and error codes
| Section | Fault Description | Fault Symptom on GSM-Tester | Priority |
|---|---|---|---|
| 8 Display Capacitors | The display is not working at all or shows strange characters. | Handset fails display test. | X Repair |
| 9 Ringer Coil | The handset ringer (buzzer) is not working or the Ringer level is too low | Handset fails ringer test. | X Repair |
| 10 Keypad LEDs | The display/keypad illumination is not working properly. | This fault cannot be tested with the GSM-Tester. | X Repair |