EW-7238RPD User Manual 12-2012 / v1.
COPYRIGHT Copyright Edimax Technology Co., Ltd. all rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission from Edimax Technology Co., Ltd. Edimax Technology Co., Ltd.
CONTENTS I. PRODUCT INFORMATION ............................................................................................................. 5 I-1. Package Contents .....................................................................................................................5 I-2. Hardware .................................................................................................................................6 I-3. LED Status ................................................................
IV-1-4-3. Mac ................................................................................................................................79 IV-2. Troubleshooting .................................................................................................................81 IV-3. Glossary .......................................................................................................................................
I. PRODUCT INFORMATION Thank you for purchasing the Edimax EW-7238RPD N300+ Dual-Band Universal Wi-Fi Extender. Extend dual-band coverage anywhere around your home and enjoy Wi-Fi on all your devices. I-1.
I-2. Hardware Reset/WPS Button ON/OFF Switch LAN Port Item Name Description Reset / WPS Button Resets the extender to factory default settings (clears all settings) or starts the WPS function. ON/OFF Switch LAN Port Reset: Press this button and hold for 10 seconds to restore all settings to factory defaults. WPS: Press this button for less than 5 seconds to start the WPS function. Power on/off switch. Switch on or off accordingly. 10/100M Ethernet LAN Port with Auto-MDI/MDI-X.
I-3. LED Status LED Color LED Status On Signal Strength Amber 2.4 GHz Slow Flashing Quick Flashing Off On Signal Strength Amber 5 GHz Slow Flashing Quick Flashing Description Excellent signal. Signal strength: 60 – 100%. Good signal. Signal strength: 60 – 40%. Poor signal. Signal strength: below 40%. No signal detected or in LED off mode. Excellent signal. Signal strength: 60 – 100%. Good signal. Signal strength: 60 – 40%. Poor signal. Signal strength: below 40%.
On LAN Green Flashing Off I-4. LAN port connected. LAN activity (transferring or receiving data). LAN port not connected. Safety Information In order to ensure the safe operation of the device and its users, please read and act in accordance with the following safety instructions. 1. The wireless extender is designed for indoor use only; do not place the wireless extender outdoors. 2. Do not place the wireless extender in or near hot/humid places, such as a kitchen or bathroom. 3.
II. QUICK SETUP There are two ways you can quickly setup the Wi-Fi extender - using browser-based iQ Setup (II-1. iQ Setup) or using the WPS button (II-2. WPS Setup). Note: It is recommended that you plug in the extender close to your router/access point for the setup process. You need to establish a connection between your extender and router/access point. After setup is complete and a connection is established, you can move the extender to your preferred location. II-1.
2. You can connect to the Wi-Fi extender using a (i.) wired or (ii.) wireless connection. Note: Please disable any other Wi-Fi adapters you may have, and/or disconnect/disable any other Ethernet cables/adapters from your computer. i. Plug one end of the Ethernet cable into the Wi-Fi extender’s Ethernet port. Plug the other end of the cable into your computer’s Ethernet port. ii. Use your Wi-Fi device (e.g. computer, tablet, smartphone) to search for a Wi-Fi network with the SSID “Edimax.
4. iQ Setup will display all available 2.4GHz and 5GHz Wi-Fi networks, listed under “SSID”. Please select one or both root Wi-Fi networks that your extender will connect to and subsequently extend. If you don’t wish to use either the 2.4GHz or 5GHz band you must select “Disable” in order to continue. Note: If the Wi-Fi network you wish to connect to does not appear, click “Refresh” to search again.
36, 40, 44 & 48 (Europe) and channels 36, 40, 44, 48, 149, 153, 157, 161 & 165 (U.S.) If you do not see your 5GHz network listed, you may need to change your router/access point’s 5GHz channel. 5. If the network you wish to connect to has a hidden SSID, select “Setup extender manually” for 2.4GHz or 5GHz and enter the SSID manually. Then input a “Device SSID” (name to identify the extender’s Wi-Fi network) and security key information.
Note: In the example above, the EW-7238RPD will connect to the root Wi-Fi network OBM-Airport-2.4G. The EW-7238RPD will extend this Wi-Fi network and use the new SSID OBM-Airport-2.4G_2EX to identify itself. 7. Click “Next” to continue and you will be prompted to add http://edimax.setup to your bookmarks (Internet Explorer and Firefox only). This is the URL to access the extender’s browser based configuration interface to further configure the settings of the extender, or to run iQ Setup again.
Note: If the extender cannot obtain an IP address from the router/access point then you will see the screen below. Click the “Static IP” button to assign an IP address to the extender and then click “APPLY” to restart the device.
Note: When assigning a static IP address to the wireless extender, you need to ensure that you assign an IP address in the same subnet as your network. For example, if your static IP is 192.168.9.2 then you need to assign the wireless extender an IP address in the range 192.168.9.x where x = 3 – 254. Please refer to IV-1. Configuring your IP address for more information.
11. After the device has restarted you will see a congratulations screen as shown below, displaying the name and security key for each of the extender’s Wi-Fi networks. 12. The extender is now functional and ready for use. If you wish to move the extender to another location, remember to switch off the extender before you unplug it. For the best coverage, select a location where the extender’s signal strength LED ( ) displays a strong signal. See II-5. Choosing the Best Location For Your Extender. 13.
14. Select the SSID which you named your extender’s Wi-Fi network in Step 5 or 6 and enter your password/security key if you set one. Note: Remember to select the SSID of your extender’s Wi-Fi network – not your existing root Wi-Fi network.
Mac: II-2. WPS Setup Note: The next section WPS Setup describes an alternative setup method to iQ Setup. If you already completed iQ Setup, it is not necessary to perform WPS Setup. Note: Please ensure the extender is ready (power LED ( ) on, not flashing) before activating WPS. If your wireless router/access point supports WPS (Wi-Fi Protected Setup) then you can use this method to set up your Wi-Fi extender’s 2.4GHz & 5GHz network.
1. Press and hold the WPS/Reset button on the wireless router/access point for the correct length of time (check router/access point’s user manual) to activate its WPS for 2.4GHz or 5GHz. 2. Within two minutes, press and hold the WPS button on the extender for two seconds to activate WPS. The WPS LED ( WPS is activated (see LED Status). ) will flash slowly to indicate Press for two seconds 3. The devices will establish a connection. When a connection is successful, the extender’s WPS LED ( (see I-3.
frequency band. In step 1 please activate WPS on your router/access point for the alternate frequency 2.4GHz or 5GHz depending on which frequency you previously set up. Note: Please check the instructions for your wireless router/access point to confirm how long you need to hold down its WPS button to activate WPS for 2.4GHz or 5GHz. Some brands of router/access point may not support WPS for 5Ghz – in this case, please use iQ Setup instead. II-3.
II-4. Connection Problems If the extender’s 2.4GHz or 5GHz Wi-Fi is disconnected from its root network, your browser will forward to the page shown below: The status of the extender will be displayed, please check your WAN connection and ensure that your router/access point is working properly. To configure the settings of the extender, click “Go to Web Control Panel” at the top of the screen and you will arrive at the home screen of the browser based configuration interface (see III.
II-5. Choosing the Best Location for Your Extender The best location to place the Wi-Fi extender is one which is an open space, roughly in the middle between your router and the Wi-Fi dead zone, and where the Wi-Fi extender LED displays “Excellent” signal strength.
III. BROWSER BASED CONFIGURATION INTERFACE Once you have setup the wireless extender as detailed in II. Quick Setup or the included QIG, you can further configure the settings of the wireless extender or run iQ Setup again using the browser based configuration interface. To access the browser based configuration interface, enter http://edimax.setup into the URL bar of a web browser on a computer which is connected to the extender’s Wi-Fi network. You will be prompted for a username and password.
You will arrive the at Home page, use the menu on the left side of the screen to navigate. You can also change the language using the drop down menu in the top right corner. - III-1. Home - III-2. iQ Setup - III-3. WPS Settings - III-4.
III-1. Home The Home page shows the basic status and information of the wireless extender. Note: Screenshots shown in this manual are examples. The information you see on your screen will be unique to your configuration.
System Uptime Displays the total passed time since the device was turned on. Hardware Version Displays the hardware version. Firmware Version Displays the current firmware version. Click “Upgrade Firmware” to open a new window to upgrade to a new firmware version. Mode Displays the current wireless operating mode. Wireless Specifies which network (2.4GHz or 5GHz) the following Configuration values (ESSID – Signal Strength) refer to.
MAC address Displays the MAC address of the LAN interface. Active Wireless Client Table MAC Address Displays the MAC address of the wireless client. Mode Displays the transmission mode (802.11b, 802.11n or 802.11g). Tx Packet Tx (Transmission) packet counter. Rx Packet Rx (Received) packet counter. Tx Rate (Mbps) Transmission Rate is displayed here in Mbps. Power Saving “Yes” or “No” is displayed here according to whether power saving feature is active.
III-2. iQ Setup To perform iQ Setup again and configure the Wi-Fi networks which the extender will connect to, select “iQ Setup”. You will see the screen below. Please refer back to II-1 iQ Setup onwards for guidance on iQ Setup.
III-3. WPS Settings WPS (Wi-Fi Protected Setup) is a simple way to establish connections between WPS compatible devices. WPS devices feature a WPS function which can be activated by pushing a WPS button on the device or from within the device’s firmware/configuration interface. When WPS is activated in the correct manner and at the correct time for two compatible devices, they will automatically connect. The WPS Settings page displays settings for WPS between your extender and a wireless client.
WPS Settings Select which frequency Wi-Fi (2.4GHz or 5Ghz) you wish to configure WPS settings for. 2.4G / 5G Wi-Fi Protected Setup Information 2.4G or 5G Wi-Fi Protected Setup Information will be displayed here depending on your selection for WPS Settings (above). WPS Status Displays “Configured” or “unConfigured” depending on whether WPS Settings for the extender have been configured or not, either manually or using the WPS button.
device (refer to client device’s user manual for guidance on how to do so) in order to establish a connection. The WPS LED ( ) will display ON to indicate a successful connection, and will remain ON for 5 minutes (see I-3. LED Status). III-4. Advanced Settings When you select “Advanced Settings” you will see the screen below. A submenu with four furthur categories you can select will also be displayed. Tx Power You can adjust the level of wireless output power as a percentage.
Click “CONTINUE” to save the changes and continue configuring other settings, or click “APPLY” to restart the system and make the changes take effect. III-4-1. WLAN 2.4GHz Security Security settings for your extender’s 2.4GHz Wi-Fi network can be configured here. If you disable the extender’s 2.4GHz band during iQ Setup then this option will not be displayed in the “Advanced Settings” menu.
Security Key access point/router. This security type will be displayed here. Enter a security key for your Wi-Fi extender’s 2.4Ghz network. This security key does not have to be the same as the root access point/router’s security key. Click “APPLY” to make changes take effect. The following message will appear: Click “CONTINUE” to save the changes and continue configuring other settings, or click “APPLY” to restart the system and make the changes take effect. III-4-2.
Broadcast SSID Device SSID Security Type Security Key Choose whether to broadcast the SSID for your extender’s 5GHz Wi-Fi network. Enter the SSID for the extender’s 5GHz Wi-Fi network (this is a name used to identify the Wi-Fi network). The extender will set the same security type as the root access point/router. This security type will be displayed here. Enter a security key for your Wi-Fi extender’s 5Ghz network.
III-4-3. Administration Utility The Administration Utility page enables you to modify the wireless extender’s password and IP address.
Password Settings Current Password New Password Re-Enter Password Enter your current password. The default password is 1234. Enter your desired new password here. You can use any combination of letters, numbers and symbols up to 20 characters. Confirm your new password. 2.4GHz Obtain an IP address Assign an automatic IP address to the wireless automatically extender’s 2.4GHz Wi-Fi band from your broadband gateway (DHCP server device).
IP Address Subnet Mask Gateway Address Specify an IP address here. This IP address will be assigned to wireless extender’s 5GHz Wi-Fi band. The default value is 192.168.9.2 Input the subnet mask of the new IP address. The default value is 255.255.255.0 Input the network’s gateway IP address (typically your broadband gateway’s IP address).
III-4-4. Configuration Tools The wireless extender’s configuration tools page enables you to back up or restore the settings, upgrade the firmware and reset or reboot the device. The latest firmware can be downloaded from the Edimax website. You will see the following screen: Manage Settings Backup Settings Restore Settings Restore to Factory Click “Save” to save the current settings of the extender as a config.bin file to your specified location.
Defaults A pop-up window will appear and ask you to confirm, please click “Ok”. A status bar will indicate the progress of the reset: Note: Restoring settings to the factory default will restore all settings, configurations and passwords back to the factory default. Note: You can also reset the device to the factory default by pressing and holding the Reset/WPS button for at least 10 seconds. See II-3. Resetting The Wireless Extender.
Reboot A system reboot will restart the device without affecting existing settings. In the event that the device malfunctions or is not responding, a system reboot is recommended. APPLY Click “APPLY” to reboot the system. You will be asked to confirm, and informed that the reboot may take a while.
IV. APPENDIX IV-1. Configuring your IP address Before you use the wireless extender, please make sure your computer is set to use a dynamic IP address. This means your computer can obtain an IP address automatically from a DHCP server. This is a simple procedure, which is explained step by step in IV-1-1. How to configure your computer to use a dynamic IP address.
follow the guide appropriate for your operating system in IV-1-2. How to modify the IP address of your PC or Macintosh. Note: For guidance on how to assign a new IP address to the wireless extender, so that it is within the same IP address subnet of your network, please refer to III-4-3. Administration Utility.
2. Select “Obtain an IP address automatically” and “Obtain DNS server address automatically”, then click “OK”.
IV-1-1-2. Windows Vista 1. Click the “Start” button (it should be located in the lower-left corner of your computer), then click “Control Panel”. Click “View Network Status and Tasks”, then click “Manage Network Connections”. Right-click “Local Area Network”, then select “Properties”. The “Local Area Connection Properties” window will then appear, select “Internet Protocol Version 4 (TCP / IPv4)”, and then click “Properties”. 2.
IV-1-1-3. Windows 7 1. Click the “Start” button (it should be located in the lower-left corner of your computer), then click “Control Panel”.
2. Under “Network and Internet” click “View network status and tasks”. 3. Click “Local Area Connection”. 4. Click “Properties”.
5. Select “Internet Protocol Version 4 (TCP/IPv6) and then click “Properties”. 3. Select “Obtain an IP address automatically” and “Obtain DNS server address automatically”, then click “OK”.
IV-1-1-4. Windows 8 1. From the Windows 8 Start screen, you need to switch to desktop mode. Move your curser to the bottom left of the screen and click. 2. In desktop mode, click the File Explorer icon in the bottom left of the screen, as shown below.
3. Right click “Network” and then select “Properties”. 4. In the window that opens, select “Change adapter settings” from the left side.
5. Choose your connection and right click, then select “Properties”. 6. Select “Internet Protocol Version 4 (TCP/IPv6) and then click “Properties”.
4. Select “Obtain an IP address automatically” and “Obtain DNS server address automatically”, then click “OK”.
IV-1-1-5. Mac OS Note: Please ensure that your wireless extender is switched on and connected to your Macintosh via Ethernet cable before you begin. 1. Have your Macintosh computer operate as usual, and click on “System Preferences”. 2. In System Preferences, click on “Network”. 3. Here you will see all of your network connections. Network Preferences will now display an Ethernet adapter, as shown below. The status of “Ethernet” should be “Connected”.
4. Click on “Ethernet” in the left panel and then click the drop down arrow for the menu labeled “Configure IPv4” in the right panel. From the drop down menu, select “Using DHCP” and then click “Apply”. IV-1-2. How to Modify the IP Address of Your PC or Macintosh Please follow the instructions appropriate for your operating system. In the following examples we use the IP address 192.168.9.20 though you can use any IP address in the range 192.168.9.
2. Select “Use the following IP address”, then input the following values: Note: Your existing static IP address will be displayed in the “IP address” field before you replace it. Please make a note of this IP address, subnet mask, default gateway and DNS server addresses. IP address: 192.168.9.20 Subnet Mask: 255.255.255.0 Click ‘OK’ when finished.
IV-1-2-2. Windows Vista 1. Click the “Start” button (it should be located in the lower-left corner of your computer), then click “Control Panel”. Click “View Network Status and Tasks”, then click “Manage Network Connections”. Right-click “Local Area Network”, then select “Properties”. The “Local Area Connection Properties” window will then appear, select “Internet Protocol Version 4 (TCP / IPv4)”, and then click “Properties”.
2. Select “Use the following IP address”, then input the following values: Note: Your existing static IP address will be displayed in the “IP address” field before you replace it. Please make a note of this IP address, subnet mask, default gateway and DNS server addresses. IP address: 192.168.9.20 Subnet Mask: 255.255.255.0 Click ‘OK’ when finished.
IV-1-2-3. Windows 7 1. Click the “Start” button (it should be located in the lower-left corner of your computer), then click “Control Panel”.
2. Under “Network and Internet” click “View network status and tasks”. 3. Click “Local Area Connection”.
4. Click “Properties”. 5. Select “Internet Protocol Version 4 (TCP/IPv6) and then click “Properties”.
6. Select “Use the following IP address”, then input the following values: Note: Your existing static IP address will be displayed in the “IP address” field before you replace it. Please make a note of this IP address, subnet mask, default gateway and DNS server addresses. IP address: 192.168.9.20 Subnet Mask: 255.255.255.0 Click ‘OK’ when finished.
IV-1-2-4. Windows 8 1. From the Windows 8 Start screen, you need to switch to desktop mode. Move your curser to the bottom left of the screen and click. 2.
screen, as shown below. 3. Right click “Network” and then select “Properties”.
4. In the window that opens, select “Change adapter settings” from the left side. 5. Choose your connection and right click, then select “Properties”.
6. Select “Internet Protocol Version 4 (TCP/IPv4) and then click “Properties”. 7. Select “Use the following IP address”, then input the following values: Note: Your existing static IP address will be displayed in the “IP address” field before you replace it. Please make a note of this IP address, subnet mask, default gateway and DNS server addresses. IP address: 192.168.9.20 Subnet Mask: 255.255.255.0 Click ‘OK’ when finished.
IV-1-2-5. Mac OS Note: Please ensure that your wireless extender is switched on and connected to your Macintosh via Ethernet cable before you begin. 1. Have your Macintosh computer operate as usual, and click on “System Preferences” 2. In System Preferences, click on “Network”.
3. Here you will see all of your network connections. Network Preferences will now display an Ethernet adapter, as shown below. The status of “Ethernet” should be “Connected”. 4. Click on “Ethernet” in the left panel and then click the drop down arrow for the menu labeled “Configure IPv4” in the right panel. From the drop down menu, select “Manually”.
5. In the panel on the right side, enter IP address 192.168.9.20 and subnet mask 255.255.255.0. Click on “Apply”. Note: Your existing static IP address will be displayed in the “IP address” field before you replace it. Please make a note of this IP address, subnet mask, router IP and DNS server address. 6. In the left sidebar, “Ethernet” should now display “Connected” as shown below. In the right panel, you should see the IP address 192.168.9.20 and subnet mask 255.255.255.0.
IV-1-3. How to Find Your Network Security Key To find your network security key, please follow the instructions appropriate for your operating system. Note: If you are using Windows XP or earlier, please contact your ISP or router manufacturer to find your network security key. IV-1-3-1. Windows 7 & Windows Vista 1. Open “Control Panel” and click on “Network and Internet” in the top menu. 2. Click on “View network status and tasks” which is under the heading “Network and Sharing Center”.
3. Click on “Manage wireless networks” in the left menu. 4. You should see the profile of your Wi-Fi network in the list. Right click on your Wi-Fi network and then click on “Properties”. 5. Click on the “Security” tab, and then check the box labeled “Show characters”. This will show your network security key. Click the “Cancel” button to close the window.
IV-1-3-2. Windows 8 8. From the Windows 8 Start screen, you need to switch to desktop mode. Move your curser to the bottom left of the screen and click. 9. In desktop mode, click the network icon in the bottom right corner.
10. Select your Wi-Fi connection from the list and right click. Select “View connection properties”. 11. In the window that opens, click the “Security” tab and check the box labeled “Show characters”. Your network security key will be displayed in the field “Network security key”.
IV-1-3-3. Mac 1. Open a new Finder window, and select “Applications” from the menu on the left side. Open the folder labeled “Utilities” and then open the application “Keychain Access”. 2. Select “Passwords” from the sub-menu labeled “Category” on the left side, as shown below. Then search the list in the main panel for the SSID of your network. In this example, the SSID is “EdimaxWireless” – though your SSID will be unique to your network.
3. Double click the SSID of your network and you will see the following window. 4. Check the box labeled “Show password” and you will be asked to enter your administrative password, which you use to log into your Mac. Enter your password and click “Allow”.
Your network security password will now be displayed in the field next to the box labeled “Show password”. In the example below, the network security password is “edimax1234”. Please make a note of your network security password.
IV-1-4. How to Find Your Router’s IP Address To find your router’s IP address, please follow the instructions appropriate for your operating system. IV-1-4-1. Windows XP, Vista & 7 1. Go to “Start”, select “Run” and type “cmd”, then press Enter or click “OK”. 2. A new window will open, type “ipconfig” and press Enter.
3. Your router’s IP address will be displayed next to “Default Gateway”. IV-1-4-2. Windows 8 1. From the Windows 8 Start screen, move your curser to the top right corner of the screen to display the Charms bar.
12. Click “Search” and enter “cmd” into the search bar. Click the “Command Prompt” app which be displayed on the left side. 13. A new window will open, type “ipconfig” and press Enter.
14. Your router’s IP address will be displayed next to “Default Gateway”. IV-1-4-3. Mac 1. Launch “System Preferences” and click on “Network”. 2. If you are using an Ethernet cable to connect to your network, your router’s IP address will be displayed next to “Router”.
3. If you are using Wi-Fi, click “Wi-Fi” in the left panel, and then “Advanced” in the bottom right corner. 4. Click the “TCP/IP” tab and your router’s IP address will be displayed next to “Router”.
IV-2. Troubleshooting If you are experiencing problems with your wireless extender, please refer to this troubleshooting guide before contacting your dealer of purchase for help. Note: If you are experiencing problems immediately after a firmware upgrade, please contact your dealer of purchase for help. Scenario I can’t log onto the browser-based configuration interface. Solution a. Please check that the extender is correctly inserted into a power socket and check the LEDs on the front panel.
I can’t log onto the browser-based configuration interface: incorrect password. I can’t establish a connection to my wireless extender. obtain an IP address. e. Ensure that all other Wi-Fi/Ethernet adapters are disabled or disconnected. a. Password is case-sensitive. Make sure the “Caps Lock” light is not illuminated. b. If you do not know your password, restore the device to factory settings. a. If encryption is enabled, please re-check WEP or WPA passphrase settings on your wireless client.
connected to your router/access point. My network is using a You can modify the IP address of the wireless bridge static IP address, how using the browser based configuration interface. do I assign an IP Please refer to III-4-3. Administration Utility. address to my wireless extender? My wireless extender The best location to place the Wi-Fi extender is one has a poor signal which is an open space, roughly in the middle from my access between your router and the Wi-Fi dead zone, and point/router.
point.com) and one or more IP addresses (such as 192.34.45.8). A DNS server keeps a database of Internet servers and their respective domain names and IP addresses, so that when a domain name is requested (as in typing "Broadbandaccess point.com" into your Internet browser), the user is sent to the proper IP address. The DNS server IP address used by the computers on your home network is the location of the DNS server your ISP has assigned to you. DSL Modem: DSL stands for Digital Subscriber Line.
ISP Gateway Address: (see ISP for definition). The ISP Gateway Address is an IP address for the Internet access point located at the ISP's office. ISP: Internet Service Provider. An ISP is a business that provides connectivity to the Internet for individuals and other businesses or organizations. LAN: Local Area Network. A LAN is a group of computers and devices connected together in a relatively small area (such as a house or an office). Your home network is considered a LAN.
PC Anywhere UDP 5632 Access point: A access point is an intelligent network device that forwards packets between different networks based on network layer address information such as IP addresses. Subnet Mask: A subnet mask, which may be a part of the TCP/IP information provided by your ISP, is a set of four numbers (e.g. 255.255.255.0) configured like an IP address.
Federal Communication Commission Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
This equipment is designed with the utmost care for the safety of those who install and use it. However, special attention must be paid to the dangers of electric shock and static electricity when working with electrical equipment. All guidelines of this and of the computer manufacture must therefore be allowed at all times to ensure the safe use of the equipment.
