Brand: SIEMENS
Category: Control Unit
Document Type: Parts/Service
Language: EN
Parts/Service for 21T3
Uploaded: Nov. 21, 2025, 9 p.m.
Manual Publish Date: 2001-09-01
The manual details the service and repair procedures for the SIEMENS 21T3 color monitor. It includes specifications, safety precautions, disassembly and reassembly instructions, adjustment procedures for various parameters like landing, convergence, and white balance, as well as a comprehensive parts list. The power saving function and diagnostic indicators are also explained.
Troubleshooting and error codes
| Failure | Power LED |
|---|---|
| +B failure | Amber → Off (0.5 sec) |
| Horizontal / Vertical Deflection failure, Thermal protector | Amber → Off (0.5 sec) |
| ABL protector | Amber → Off (1.5 sec) |
| HV failure | Amber → Off (0.25 sec) (0.25 sec) → Amber → Off (0.25 sec) (1.25 sec) |
| Aging / Self Test | Amber → Off (0.5 sec) (0.5 sec) → Green → Off (0.5 sec) (0.5 sec) |
| Out of scan range | Green (OSD indication) |