About This Document
Purpose
This document describes the complete process of troubleshooting from the following aspects: safety precautions, troubleshooting preparations, fault diagnosis principles and methods, troubleshooting procedure, and methods of troubleshooting common faults.
Intended Audience
This document is intended for:
- Technical support engineers
- Maintenance engineers
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol |
Description |
|---|---|
Indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury. |
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Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury. |
|
Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury. |
|
Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results. NOTICE is used to address practices not related to personal injury. |
|
Supplements the important information in the main text. NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration. |
Conventions
If a product does not function as described in this document, contact Huawei technical support engineers.
Change History
Updates between document issues are cumulative. Therefore, the latest document issue contains all updates made in previous issues.
Issue 08 (2021-10-30)
This issue is the eighth official release.
Optimized some descriptions.
Issue 07 (2021-06-30)
This issue is the seventh official release.
Optimized some descriptions.
Issue 06 (2021-06-11)
This issue is the sixth official release.
Modified some description.
Issue 05 (2021-01-30)
This issue is the fifth official release.
Modified some description.
Issue 04 (2020-11-30)
This issue is the fourth official release.
Modified some description.
Issue 03 (2020-04-10)
This issue is the third official release.
Modified some description.
Issue 02 (2020-07-15)
This issue is the second official release.
Modified some description.
Issue 01 (2020-04-10)
This issue is the first official release.