Dell K20A, Руководство пользователя

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Frequently asked questions
1. The fan is not working after connecting with the system.
●
The fan is triggered by temperature. The dock fan will not rotate until the dock is hot enough to trigger a thermal
threshold.
● Vice versa, if your dock is not cool enough, the fan will not stop even when you disconnect the dock from the system.
2. The dock does not work after high-speed fan noise.
● When you hear a loud fan noise, it is warning you that the dock is in some kind of a hot condition. For example, the
vent in the dock may be blocked or the dock is working in a high working-temperature environment (> 35C), etc,.
Please eliminate these abnormal conditions from the dock. If you do not eliminate the abnormal condition, in a worst-case
situation, the dock will shut down through the over-temperature protection mechanism. Once this happens, please
un-plug the Type-C cable from the system and remove the dock’s power. Then wait 15 seconds and plug in the dock
power to recover the dock back online.
3. I hear a fan noise when I plug in the dock’s AC adapter.
● This is a normal condition. First time plugging in of the dock’s AC adapter will trigger the fan to rotate, but it will
subsequently turn off very soon.
4. I hear a loud fan noise. What’s wrong?
●
The dock fan is designed with five different rotate speeds. Normally, the dock will work on low fan speed. If you put the
dock in a heavy loading, or in a high working-temperature environment, the dock fan may have a chance to work at a
high speed. But, this is normal and the fan will work at a low/high speed depending on the work loading.
Table 15. Fan states
State State name Fan speed (rpm)
0 Fan off Off
1 Fan minimum 1900
2 Fan low 2200
3 Fan medium 2900
4 Fan medium-high 3200
5 Fan high 3600
5. What is the charging station feature?
● The Dell Thunderbolt Docking Station WD19TBS can charge your mobile or power bank even without being connected to
the system. Just make sure your dock is connected to external power. The dock fan will rotate automatically if the dock
gets too warm. This is normal working condition.
6. Why am I asked to approve Thunderbolt Devices after the Windows logon and what should I do?
● This is for Thunderbolt security. You are asked to approve a Thunderbolt device because the Thunderbolt Security level
on your unit is set to “User Authorization” or “Secure Connect” in the BIOS Setup. You will not see this page if the
Thunderbolt Security level on your system is set to “No Security” or “DisplayPort Only”. Also, if you checked “Enable
Thunderbolt Boot Support” in the BIOS Setup and power-on the system with the WD19TBS dock attached, you will not
see this page because the Security level is overridden to “No Security” in this case. When you are asked to approve
a Thunderbolt device, you may select “Always Connect” if you do not have any security concerns to always allow the
Thunderbolt device connection to your system. Or you may select “Connect Only Once” or “Do Not Connect” if you do
have concerns.
7. Why does it take a long time for the system to recognize all the peripheral devices which are attached to the
docking station?
● Security is always Dell’s highest priority. We ship our systems with “Security level - User Authorization” setting by
default. This allows our customers to review the Thunderbolt security conditions of their systems so they can make
selections accordingly. However, this also means the Thunderbolt dock and the devices attached to it will need to pass
Thunderbolt driver security permission checking to get it connected and initialized. This normally means some extra time
is needed before these devices can be accessed by users.
8. Why does the hardware installation window show up when I plug in a USB device to the docking stations ports?
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32 Frequently asked questions