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Unisight TZHEF08 User Manual

Embedded dvr digital video network surveillance system
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T Z H E F 0 8 E m b e d d e d D V R U s e r M a n u a l
Digital Video Network Surveillance System
Unisight Digital Technologies, Inc.

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  • Page 1 T Z H E F 0 8 E m b e d d e d D V R U s e r M a n u a l Digital Video Network Surveillance System Unisight Digital Technologies, Inc.

  • Page 2: User Manual

    User Manual (V2.0) Thank you for purchasing Unisight Embedded DVR. This manual applies to TZHEF08 Series Net DVR. Please read it carefully for the better use of the product. The contents in this manual are subject to change without notice. Unisight assumes no responsibility for inaccuracies or omissions and specifically disclaims any losses, or risks incurred as a consequence, directly or indirectly, of the use of any of the contents of this manual.

  • Page 3: Table Of Contents

    View Tampering Alarm....................45 Video Loss Alarm ......................47 5.10 Motion Detection.......................48 5.11 Preview Properties.....................51 5.12 Recording Setup ......................53 5.13 External Alarm Input and Relay Output ..............56 5.14 Network Parameters ....................62 5.15 PTZ..........................64 5.16 RS232 setup.......................69 RS232 menu description........................... Unisight Digital Technologies, Inc.
  • Page 4 Appendix A Mouse control function ....................81 Appendix B HDD Capacity Calculation ..................83 Appendix C DVR Connect Cable Definition ..................84 RS-485 connect cable made method ................84 RS-232 connect cable made method ................84 UTP network connect cable made method..............85 Appendix D Troubleshooting ......................87 Unisight Digital Technologies, Inc.

  • Page 5: Chapter1 Product Introduction

    Industry such as video and audio encoding/decoding, hard disk record and TCP/IP. The firmware is burned in the flash, more stable and reliable. TZHEF08 series device has both the features of digital video recorder (DVR) and digital video server (DVS). It can work stand alone, also be used to build a powerful surveillance network, widely used in bank, telecommunication, transportation, factories, warehouse, irrigation, etc.

  • Page 6: Checking The Dvr And Its Accessories

    2.1 Checking the DVR and Its Accessories When you get the product, check that all the items are included in your product package. There is a list in the package. If any of the items is missing, please contact your dealer. Unisight Digital Technologies, Inc.

  • Page 7: Chapter3 Operational Instructions

    [SHOT]in PTZ control (adjust preset). 1. Enter into PTZ control mode; 2. [IRIS-]in PTZ control.. PREV Multi screen preview switch; Switch menu mode into preview; [FOCUS-]in PTZ control. Input switch (number, lower case, upper case and Unisight Digital Technologies, Inc.

  • Page 8: Ir Controller

    1. Menu mode, use[ ]/[ ] select,[ ]/[ ] to edit; 2. PTZ direction control; 3. Playback speed control. Menu confirmation; ENTER Select or × to enable or disable; Pause playback. 3.2 IR Controller Fig 3-2 IR elevation Unisight Digital Technologies, Inc.
  • Page 9 Loading the batteries into the IR controller 1. Remove the battery cover. 2. Insert the battery. Please take care that the poles (+ and -) are correctly positioned. 3. Replace the battery cover. Start to use IR controller Unisight Digital Technologies, Inc.
  • Page 10 When IR controller can not work normally Check batteries poles. Check the remaining charge in the batteries. Check IR controller sensor is mask. Please change another IR controller to try again. It the problem is still existed, please contact administrator. Unisight Digital Technologies, Inc.

  • Page 11: Menu Description

    Alarm input type (Normal open/ Normal close) PTZ parameters Alarm handling & policy & PTZ Preset setup Alarms linkage Sequence setup Copy to alarm in Cruise setup Alarm out & time Alarm out schedule Copy to alarm out Unisight Digital Technologies, Inc.

  • Page 12: Menu Operation

    4) Press [PTZ] short key to enter into PTZ control interface. Notes: You must input user name and password. The default user name is “admin” and password is “12345”. Main Menu Description The main menu interface is shown as fig 3.3: Unisight Digital Technologies, Inc.
  • Page 13 ([↑][↓]). When the “Active Frame” is located on one icon, you can press [ENTER]key to enter into the sub menu. For example, move the “Active Frame” to “Image” icon, press [ENTER] to enter into the sub menu as following fig 3.4: Unisight Digital Technologies, Inc.
  • Page 14 Use [EDIT]key to delete the character in front of cursor; d) Press [ENTER] to save & exit or[ESC]to exit without saving. Button: Trigger a special function or enter into next sub-menu. For example, press “Policy” button to enter into sub-menu. Press [Confirm] to Unisight Digital Technologies, Inc.

  • Page 15: Input Text

    Note: Please make sure the power supply matches DVR and AC adapter connected correctly. Before switch DVR on, please connect one monitor with VOUT or VGA interface. Otherwise, you can not see graphic user interface and can not operate. Unisight Digital Technologies, Inc.

  • Page 16: Preview

    In the screen, it will display record and alarm status of each camera. Shown as fig 4.1, These two kinds of status will switch over automatically. Press [A] key to display or hide the camera status bar. Unisight Digital Technologies, Inc.

  • Page 17: Status Description

    Digital Video Network Surveillance System Fig 4.1 Recording status Form 4-1 Camera record status Icon Icon Color Status Description White No video signal Yellow Video input Pink Manual recording Green Real time recording Blue Motion detect recording External alarm recording Unisight Digital Technologies, Inc.

  • Page 18: Status Description

    Form 4.2 Camera alarm status Icon Status Description White Video signal lost Yellow View tampering alarm Pink Motion & External alarm Green No alarm Blue Motion alarm External alarm Press numeric keys to switch over individual camera preview. For example, Unisight Digital Technologies, Inc.

  • Page 19: User Name And Password

    For those users created by admin, they can modify their password as following Step1: Enter into main menu Press[MENU]key, in the login dialog, select your user name, input the correct password, you can enter into the main menu. As Following pictures shows. Unisight Digital Technologies, Inc.
  • Page 20 Digital Video Network Surveillance System Fig 4.4 Input password Fig 4.5 Main menu Step 2: Select the objective user name by using [↑],[↓] then move the “Active Frame” to “Password” icon by using[ ]/[ ]keys. As fig 4.6 shows. Unisight Digital Technologies, Inc.

  • Page 21: Ptz Control

    You can repeat step 3 to modify again. 4.4 PTZ Control Note: The user must have the “PTZ control” right. PTZ control interface In preview mode, press[PTZ]key, in the login dialog, select one user name and Unisight Digital Technologies, Inc.
  • Page 22 PTZ. After you select the camera PTZ, you can use the control keys to control PTZ. PTZ control keys description Direction control keys: [↑],[↓],[←],[→]; ZOOM control keys: [ZOOM+],[ZOOM-]; FOCUS control keys: [FOCUS+],[FOCUS-]; Unisight Digital Technologies, Inc.

  • Page 23: Manual Record

    In preview mode, press[REC]key, in the pop-up login dialog, select the name and input the correct password, you can enter into the “Manual Record” interface. In menu mode, press[REC]key to enter into “Manual Record” interface directly. Unisight Digital Technologies, Inc.
  • Page 24 Start All: Press this button to start all channels recording. Stop All: Press this button to stop all channel recording. Press[ESC]key to enter into preview mode. Press[MENU]key to enter into main menu. Press[PLAY]key to enter into playback menu. Press[PTZ]key to enter into PTZ control mode. Unisight Digital Technologies, Inc.

  • Page 25: Playback

    Select a Channel: Move the “Active Frame” to “chan”, press “edit” button, then use[↑]or[↓]key to select a channel. Rec Type: Use[↑]or[↓]to select recorded files type. The file type options have “All”, “All Time”, “Motion Detect”, “Alarm” and “Manual”. Unisight Digital Technologies, Inc.
  • Page 26 Backup Today: Backup all recorded files of today. Operation when playback Fig 4.10 Playback interface At the bottom of image, there is an information bar and the following information is included: Volume, Play Progress, Play Speed, Played Time and File Unisight Digital Technologies, Inc.
  • Page 27 PTZ control mode. Playback with mouse plunged If you playback with a mouse plunged, the interface will be a little different. And you can acquire more functions to operate in the playback course. Shown as following fig 4.11. Unisight Digital Technologies, Inc.
  • Page 28 : Click this button to start copy the segment, click it again to stop. : Click this button to hide the control bar, right click your mouse and select display to display the control bar. Unisight Digital Technologies, Inc.

  • Page 29: Backup Recorded Files

    “Active Frame” to “Search” button, press[ENTER]key, DVR will start to find and list the matched files. Step 2: Select the files that you want to backup In the file list box, use[↑]or[↓]keys to move the scroll bar. When the scroll bar Unisight Digital Technologies, Inc.
  • Page 30 This segment is selected; 3. You can repeat step 2 to select many segments. 30 segments can be selected in all; 4. After you select all segments, press[ESC]key, a message window will pop- Unisight Digital Technologies, Inc.

  • Page 31: Shut Down Dvr

    12) Alarm output schedule 5.1 Administrator and Password When DVR is left from factory, there is one default administrator. The name is “admin” and password is “12345”. The name can not be changed, while the password can be. Unisight Digital Technologies, Inc.
  • Page 32 “12345”, press “Confirm” to enter into administrator menu. Fig 5.1 Enter into user menu Move “Active Frame” to “User” icon, press[ENTER]key to enter into “User Management” menu. Shown as fig 5.2 Unisight Digital Technologies, Inc.
  • Page 33 If password and verify password are not same, a warning message box will be appeared. Shown as fig 5.3 Fig 5.3 Error In this case, press[ENTER]to return password edit box, and input new password Unisight Digital Technologies, Inc.

  • Page 34: Add And Delete User

    In the “User Management” menu, move “Active Frame” to “Add” button and press [ENTER], in the pop-up dialog, input the new user name (refer to chapter 3.4), press [ENTER]and return “User Management” menu. Totally 15 users can be added. Shown as fig 5.5 Unisight Digital Technologies, Inc.
  • Page 35 The default rights include local playback, remote playback and view log. If you want to define the detail rights, move “Active Frame” to “Setup Privileges” button and press[ENTER]to enter into rights setup menu as following: Shown as picture 5.6 Unisight Digital Technologies, Inc.
  • Page 36 RS-485 keyboard. PTZ control: Locally control PTZ; Record: Manual start/stop recording; Set parameters Setup: Locally setup the DVR parameters; Log: Locally view the log on DVR; Utilities: Locally upgrade firmware, format HDD, reboot DVR and shut down Unisight Digital Technologies, Inc.
  • Page 37 ] to move “Active Frame” to “Del” button, press[ENTER], in the pop-up confirmation dialog, press “Confirm” button to delete the selected user and return. Press “Cancel” or[ESC]to abort deleting. Shown as fig 5.7 Fig 5.7 Delete user Unisight Digital Technologies, Inc.

  • Page 38: Unit Name And Device Id

    ID for each DVR. Otherwise, the IR controller will control all DVR with the same device ID at the same time. In “Display” menu, move “Active Frame” to the device ID edit box, in the edit Unisight Digital Technologies, Inc.

  • Page 39: Video Output Standard And Vga Setup

    Press “Confirm” button to save or “Cancel” to abort. 5.5 Camera name and OSD Setup Camera Name In “Camera” menu, you can define name for each camera. Please notice that camera’s name can not be copied. Shown as fig 5.9 Unisight Digital Technologies, Inc.
  • Page 40 Step 3: Enable the check box on the right side of camera name, then you move “Active Frame” to “Position” button, press[ENTER]to enter into camera name position setup interface, picture below that interface, use[ ][ ][ ][ ]keys to move camera name position. When the position is fixed, Unisight Digital Technologies, Inc.
  • Page 41 YY MM DD YY MM DD Here YY means year, MM means month, DD means day. You can also enable DST (Daylight-saving Time) function here. Shown as fig 5.10 Fig 5.10 Date/time setup Date OSD Position Unisight Digital Technologies, Inc.

  • Page 42: Video Parameters Setup

    You can setup the camera individually, and also you can copy the video parameters of one camera to any other cameras. Here are the setup steps: Step 1: Enter into “Camera” ,select a camera then enter “Color setup” menu. Shown as fig5.12 Unisight Digital Technologies, Inc.

  • Page 43: Mask Area Setup

    After adjusting, in “Image Setup” menu, press “Confirm” button to save parameters and make them into effective. Otherwise, press “Cancel” button or[ESC]key to abort modification. 5.7 Mask Area Setup In some cases, maybe you want mask the sensitive area. This area will not be Unisight Digital Technologies, Inc.
  • Page 44 Step 5: Save mask area: You can repeat step2, step3 and step4 to setup mask area for other cameras. In “Advanced setting” menu, press “Confirm” button to save the mask area, press “Cancel” button to abort. Here is the example for mask area function. Shown as fig 5.14 Unisight Digital Technologies, Inc.

  • Page 45: View Tampering Alarm

    [ENTER]key to enter into area setup interface. The setup methods are same as that of mask area setup. After setup the area, press[ENTER]key to return “Advanced settings” menu. You can press[ESC]key to abort. Only one view tampering area can be setup, and the size of the area can be full screen. Unisight Digital Technologies, Inc.
  • Page 46 Step 8: Save alarm setup: After your setup, press “Confirm” button and return “Image Setup” interface. In “Image Setup” menu, press “Confirm” button to save current camera parameters and return main menu. Step 9: Save all cameras: If you want to setup other cameras, please repeat from step2 to Unisight Digital Technologies, Inc.

  • Page 47: Video Loss Alarm

    “Signal Loss” item, use[ ]key to select “Handle” option and move “Active Frame” to the “Policy” button on right side. Press[ENTER]to enter into “Signal Loss” interface: Shown as fig 5.16 Fig 5.16 Video signal loss handle setup Unisight Digital Technologies, Inc.

  • Page 48: Motion Detection

    Step 4: Motion area setup: You must define motion areas so that DVR will response when there is motion in those areas. Move “Active Frame” to “Area” button on the right side of sensitivity list box, press[ENTER]key, you can enter into “Motion Area Setup” interface. Shown as fig 5.17. Unisight Digital Technologies, Inc.
  • Page 49 22) [ESC]: Cancel setup and return “Image Setup” menu; Step 5: Motion alarm policy: Move “Active Frame” to the corresponding “Policy” button of motion detection alarm, press[ENTER]key to enter into “Motion Alarm Handle” menu: Shown as fig 5.18 Unisight Digital Technologies, Inc.
  • Page 50 “On Screen Warning”, “Audible Warning”, “Upload to Center” and “Trigger Alarm Output”. Description: If “On Screen Warning” is enabled, when there is motion alarm happened and DVR is in preview mode, DVR will switch to the related camera. If you trigger more than one Unisight Digital Technologies, Inc.

  • Page 51: Preview Properties

    In “Preview” menu, you can setup preview mode, screen switch time, enable or disable audio preview and preview layout. Step 1: Enter into “Preview” menu: In the main menu, move “Active Frame” to “Preview” icon and press[ENTER], you can enter into “preview” menu. Shown as fig 5.19 Unisight Digital Technologies, Inc.
  • Page 52 You can move “Active Frame” among the windows. There is one bar under the square to display the preview order of all cameras. First select the biggest screen preview mode, for example, for 4-channel DVR, select “4 Unisight Digital Technologies, Inc.

  • Page 53: Recording Setup

    “Overwrite” option, when all HDDs in DVR are full, DVR will overwrite the earliest recorded files and continue recording. If you select “Stop recording” option, when all HDDs are all full, DVR will handle it as “Hard Disk Full” exception, please refer to chapter 5.17 for exception menu. Unisight Digital Technologies, Inc.
  • Page 54 Enable Rec: Enable or disable selected camera record function. “×” means disable and “ ” means enable. Schedule: When you enable recording function, you can setup recording schedule. Note: When the camera’s recording schedule is modified, you must reboot DVR to make it into effective. Unisight Digital Technologies, Inc.
  • Page 55 There are 4 time periods for one day, and each time period can select different record type. Input start time and stop time for each time period, and select record type for each period. The record type options are: All Time, Motion Detect, Alarm, Motion&Alarm and Motion|Alarm, Unisight Digital Technologies, Inc.

  • Page 56: External Alarm Input And Relay Output

    For DS-7108 , there are 16 alarm in and 4 relay out. In “Alarms” menu, you can setup for each external alarm input. In main menu, move “Active Frame” to “Alarms” icon and press[ENTER]key to enter into alarms menu: Shown as fig 5.22 Unisight Digital Technologies, Inc.
  • Page 57 “Handle”. If you select “Handle” option, you can active “Policy” and “PTZ Linkage” buttons on right side. Move “Active Frame” to “Policy” button and press[ENTER]key, you will enter into “Alarm in Handling” sub menu: Shown as fig 5.23 Unisight Digital Technologies, Inc.
  • Page 58 DVR is in preview mode, DVR will pop-up the related camera. If you trigger more than one camera, DVR will pop-up them one by one every 10 seconds. When the external alarm is disappeared, DVR will restore preview mode. Step 7: Save setup Unisight Digital Technologies, Inc.
  • Page 59 Note: Please make sure that the PTZ you are using can support preset, sequence and cruise functions. One external alarm input can trigger many cameras PTZ linkage. Step 9: Copy the parameters to other external alarm input You can copy the parameters of current alarm input to other external input. Unisight Digital Technologies, Inc.
  • Page 60 Shown as fig 5.25 Fig 5.25 Alarm out schedule Step 4: Setup alarm out schedule Like other schedule setup, you can set 4 time periods for one day and 7 days for one week. Unisight Digital Technologies, Inc.
  • Page 61 Upload to Center: Send exception information to center host PC. Trigger Alarm Output: trigger local relay output. You can select more than one handle methods. After you finish setup, press “Confirm” button to save parameters. Press “Cancel” button Unisight Digital Technologies, Inc.

  • Page 62: Network Parameters

    DHCP server and get one dynamic IP address. This item will display the dynamic IP address. If DVR uses PPPoE function, also DVR can dialup into internet and this item will display the dynamic internet IP address. Port: Network access port number, must be greater than 2000. Unisight Digital Technologies, Inc.
  • Page 63 DNS IP with one fixed Internet IP, DVR will send some information such as DVR name, DVR serial number, DVR current IP to that fixed IP address. We -call that fixed Internet IP as DNS IP. Unisight Digital Technologies, Inc.

  • Page 64: Ptz

    There is one RS-485 port at DVR rear panel used for PTZ control. You can setup RS-485 parameters to match your PTZ protocol. In main menu, move “Active Frame” to PTZ icon and press[ENTER]key, you can enter into PTZ menu as following: Shown as fig 5.29 Unisight Digital Technologies, Inc.
  • Page 65 Note: In DVR “PTZ” menu, if you select Pelco-P protocol, when you setup PTZ address, please plus or minus one compared with Camera ID. For example, if camera ID is 2, the DVR PTZ address is set as ID 3. Unisight Digital Technologies, Inc.
  • Page 66 Add preset number: You can input preset number (among 1-128) in the edit box. Then press “Adjust” button to enter into PTZ control interface. In PTZ control interface, you can use direction keys to adjust PTZ position, and use[IRIS+][IRIS-][FOCUS+][FOCUS-][ZOOM+][ZOOM-]keys Unisight Digital Technologies, Inc.
  • Page 67 Each sequence is made up of cruise points, and each cruise point includes preset number, dwell time and dwell speed. Dwell time is the time staying at that preset number. Dwell speed is the speed that PTZ is moved to that preset number. Unisight Digital Technologies, Inc.
  • Page 68 PTZ with direction keys, press[ENTER]to save the operation track and return “Cruise” setup menu. Press “StartCru” button to repeat the PTZ track until you press “Stop” button. Press “Return” button back to “PTZ” menu. In “PTZ” menu, press “Confirm” button to save this cruise. Unisight Digital Technologies, Inc.

  • Page 69: Rs232 Setup

    Callback mode: Only used when work mode is “PPP”. There are two options: “By Dialer” and “Preset Tel’. This function is not available. Remote IP: Only used when work mode is “PPP”. This IP is defined for remote PC that will connect DVR through PSTN. Unisight Digital Technologies, Inc.

  • Page 70: Example: Ppp (Modem) Passive Dialup Through Pstn

    Step 1: RS232 setup Setup baud rate, data bit, stop bit, parity and flow control. They must be the same as those of modem connected with PC. Step 2: Video setup In “Recording” menu, select the camera you want to transfer through Unisight Digital Technologies, Inc.
  • Page 71 Dial-up Connections” folder. Setup should be specially pay attention to: Open the properties of the new-established dialup program, select “Advanced”(custom settings) in security option, press setup, set it in the popup dialogue box that is “Advanced Unisight Digital Technologies, Inc.
  • Page 72 Digital Video Network Surveillance System Security Settings” as follows: Unisight Digital Technologies, Inc.
  • Page 73 Step 5: After successful dialup, network will designate the “remote IP” address to PC, e.g. the set 192.1.0.1. User can Ping-link the assigned IP address through Ping command, and can Ping-link DVR. Please refer to the following picture. Unisight Digital Technologies, Inc.
  • Page 74 Digital Video Network Surveillance System Step 6: You can preview the image of 192.1.0.2 by using client-end software. Unisight Digital Technologies, Inc.

  • Page 75: Chapter6 Utilities

    “Hard Disk”, “Stop Alarm Out”, “Reboot”, “Power Off”, “View Log” and “System Info”. Enter into “Utilities” menu: Shown as fig 6.1 Fig 6.1 Utilities 6.1 Restore Parameters Restore factory parameters for DVR. The IP address, gateway and port number will not be restored. Shown as fig 6.2 Unisight Digital Technologies, Inc.

  • Page 76: Upgrade

    You can use this function to upgrade the firmware. Please confirm the language is matched. Press “Upgrade” icon, in the pop-up dialog, you can select either “FTP” or “USB” upgrade mode. Shown as fig 6.3 Fig 6.3 Upgrade If you select “FTP” mode, you will enter into “FTP Upgrade” menu: Unisight Digital Technologies, Inc.

  • Page 77: Hard Disk Management

    6.5 Hard Disk setup Check HDD work status Capacity, Free space, Stand by or not, Normal status or not. Format HDD Before formatting stop all recording. After formatting, you must reboot DVR, otherwise DVR will not work normally. Unisight Digital Technologies, Inc.

  • Page 78: Stop Alarm Out

    Make DVR be ready for shutting down, turn of the switch on the rear panel 6.7 View Log To view the log recorded in DVR HDD. In “Utilities” menu, press “View Log” to enter into “Log” menu: Shown as fig 6.6 Fig 6.6 View log Unisight Digital Technologies, Inc.
  • Page 79 Host Address, Para. Type, Channel No, HDD No, Alarm In and Alarm Out. You can press “More Info” button for more information, also select page number to view more information. Step 5: Press “Return” button back to “Utilities” menu. By Time View the log between one time period. Unisight Digital Technologies, Inc.

  • Page 80: System Information

    Step 5: After finish searching, DVR will list the matched log information. Step 6: Press “Return” button back to “Utilities” menu. 6.8 System Information Press “System Info” icon in “Utilities” menu, you can get DVR system information. Unisight Digital Technologies, Inc.

  • Page 81: Appendix A Mouse Control Function

    Pop-up menu including confirm & cancel 4. Area configure interface Right click Pop-up menu including confirm、cancel、clear、full(this option only appear in motion detect area configuration) Drag the left key Extend or shrink area Moving The primary grid following with cursor Unisight Digital Technologies, Inc.
  • Page 82 Single-click the right key Cancel the operations you did and back to previous interface Scroll wheel forward Select previous file Scroll wheel backward Select next file Drag the left key Select an area to zoom in (For SAE\YAAN protocol) Unisight Digital Technologies, Inc.

  • Page 83: Appendix B Hdd Capacity Calculation

    DVR Step 4: According to Formula (4) to calculate total capacity (accumulation) that is needed for all channels in DVR during alarm video recording (including motion detection). ∑ ×a% In the formula：a% means alarm occurrence rate Unisight Digital Technologies, Inc.

  • Page 84: Appendix C Dvr Connect Cable Definition

    2 RS-232 connect cable made method DS-7000HI has standard DB9 RS-232 interface, like PC COM port. Pin definition I means DVR input and O means DVR output. Pin index Name Description Carrier Detect Receive Data Transfer Data Unisight Digital Technologies, Inc.

  • Page 85: Utp Network Connect Cable Made Method

    (1) Use the following method to make the network cable when DVR is connected with network hub or switch. The corresponding relationship of the direct cable (2) Use the following method to make the cross network cable when DVR is directly connected with client-end PC. Unisight Digital Technologies, Inc.
  • Page 86 Digital Video Network Surveillance System The corresponding relationship of cross cable Unisight Digital Technologies, Inc.

  • Page 87: Appendix D Troubleshooting

    If the circuit board is wet, dust on circuit board can cause a short circuit. The circuit board, plug and socket, housing fan and housing should be cleaned by brushing regularly. Unisight Digital Technologies, Inc.

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