However, from the perspective of system maintenance, the maintenance of digital audio working systems is much more detailed and difficult than traditional analog audio equipment. Its maintenance scope includes not only hardware maintenance in the traditional sense, but also software and network maintenance. Therefore, in the context of the current development of digitalization, automation and networking of broadcasting, it is inevitable to put forward higher requirements on all aspects of our maintenance personnel, especially the mastery of computer knowledge.
Yuhang Radio has been using the XW-200 audio workstation system developed by Beijing Zhongtian Company since 1996. In the past seven years of system use, many kinds of failures have occurred, especially in the early stage of the system, especially when the failure rate is high, and there have been many incidents that affect the normal broadcast of the system due to improper handling. By summarizing the experience of monitoring the system for many years, the author made some statistics on all the faults of the XW-200 system, and combined with the statistical data of the brother station, the following conclusions were drawn: about 70% of the faults were caused by human error. 20% of the faults are caused by network failures, and the last 10% are caused by hardware failures of the computer itself. In 70% of human faults, the form of the network is abnormal, and it accounts for nearly 60%. Thus, in a sense, the audio workstation system is actually a small computer LAN. In order to effectively reduce the incidence of these three types of system failures, the author has tried and tried to find a set of troubleshooting methods to determine whether the network work is normal. In order to express this method intuitively, in this paper, the author takes XW-200 as an example to enumerate and analyze some common faults and specific countermeasures of the system, covering three aspects of software fault, network fault and computer fault. I hope relevant technical personnel can give inferences and help for the maintenance and overhaul of other types of workstations.
First, the system recording software is abnormal
Because there is a clear individual difference in the computer knowledge that each user has, the methods used in the operating system of the audio workstation are also very different. However, there are many irregular operations without paying enough attention, thus being invisible. It caused the most common and serious system recording software to work abnormally. When such a fault occurs, there are usually two manifestations: the network connection fails, which directly leads to the inability to enter the program recording software; or the network can enter the recording software although the connection is successful, but no operation can be performed. The root cause of the failure is mainly caused by the network connection path being changed or the system dynamic connection library file being destroyed. Summarize the maintenance experience of this type of fault, and finally get the troubleshooting method shown in Figure 1. The whole process can obtain satisfactory repair results in only three steps.
The first step is to determine whether the network connection is normal as a preliminary fault point. Re-open the faulty computer and observe if the machine can connect to the network normally. If the connection fails, it indicates that the terminal is not properly connected to the system network, and the fault point must be on the network connection. Open the control panel, select the ODBC data source, double-click the Radio_Station_Local project bar, click the repair button, first select the correct drive letter F (that is, the drive letter where the database is located), and then connect the specific database path F:\DBF\Local\Pro_edit.mdb , click the OK button and the system will be repaired. Practice has proved that the vast majority of network connections after booting are caused by drive letter selectivity errors. .
The second step, after the network connection is normal, open the recording software and try to find out whether the software retrieval function is normal. If the exception occurs, you can recheck that the database connection path is correct according to the first step. The database cannot be connected and the software loses the basis of normal work. In general, the faults at this time are caused by the faulty path location, and can be corrected again. But there is also a situation where the system's search keywords are artificially changed. The extraction of system data depends on the correct search keyword. Once the keyword is changed, the basis for the normal operation of the data extraction function changes immediately. At this time, even if the terminal workstation is normally connected to the database, the data exchange between the foreground and the background cannot be performed according to the operator's wishes, and naturally, the program cannot be recorded and accessed. In this case, a more secure solution is to enter the correct search key before setting up the system password. In this way, in addition to the system administrators, it is impossible for other ordinary users to make any changes, thus ensuring the stability of the system.
The third step is to experimentally record a small program and send it to see if the process can be completed smoothly. If the process cannot be completed, it is clear that the audio workstation system files are corrupted. Re-cover the damaged system file, and the repair work is completed.
In order to prevent the system files from being destroyed again, the author took three precautionary measures. After such simple processing, the faults caused by the abnormality of the system files in our audio workstation system were greatly reduced.
First, divide all client hard disks into two partitions, C and D. It is also stipulated that the C drive can only be used to store system files, and does not allow storage of any other types of files. The D drive is used to store the self-built folder of the recording personnel, and each person can only build one for overall management. Secondly, set all the folder attributes of all audio workstation systems in the C drive to “hidden†so that they are all This file is not visible in the file directory. This measure reduces the possibility of misoperation of system files by various operators, and indirectly improves the stability of the system. Finally, a new system backup folder is created on the C drive, and a complete set of internal files is saved. Audio workstation system files. In this way, even in the event of system file corruption, technicians can quickly recover recovery by comparing the size of each system folder, reducing the time for system repair.
Second, the "card" phenomenon of system operation
In the course of using the audio workstation, you will encounter the situation that the system that was working normally suddenly has a very slow network speed, and the recording workstation and the broadcast workstation have intermittent “cards†from time to time during operation. . Check the network connection, server and HUB and other hardware facilities, everything is normal. Finally, in the virus detection, it was found that there were a large number of viruses in the whole system, and the proportion of worms and happy hour viruses was the highest. Since my audio workstation system is a small independent LAN and does not connect to the outside network, it is impossible to have a virus under normal circumstances. Therefore, it is judged that an operator has copied a file into the computer through a floppy disk drive or a CD-ROM drive on the client, thereby introducing a virus and causing network congestion. In order to prevent such failures from happening again, disconnect the network and separately disinfect the server and each client, install a firewall on all clients, and ensure regular upgrades. Also remove the floppy disk drive and optical drive on the client, and set the CMOS password to close the floppy drive and unused computer peripheral interfaces, such as COM port, USB and printer parallel port. After this mandatory measure, the workstation system no longer has a "card" failure during operation.
Third, the hub is often disconnected
In the normal use of audio workstation hubs, inexplicable disconnection faults often occur, and the time interval between faults is short and short, and there is no rule to follow. Check the HUB and the network line to make sure everything is normal, and the maintenance is confused. At an occasional opportunity, the HUB was immediately disconnected after the illumination was changed from bright to dark-light. It is understood that the HUB's frequent disconnection has a direct relationship with the power pulse. After determining the source of the fault, a new 3KV UPS was installed in the equipment room to improve the system's anti-interference ability to the electric pulse, completely eliminating the type of fault.
Fourth, computer hardware failure
This type of fault has a single performance, and usually prompts that the network card, sound card, etc. cannot be found. The elimination method is also relatively simple. Firstly, the whole machine is dedusted, and then the ISA or PCI slot can be cleaned. Of course, the most secure way to achieve safe broadcast is to replace the computer.
At present, the digital audio workstation system used in various radio stations has many models, and the overall structure and performance are not the same. I hope that this paper can have certain technical reference for the maintenance and maintenance of similar systems in the same industry. As the most important prerequisite for effectively solving such faults, we must constantly absorb new computer technology and expand our knowledge to improve our business.
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