Manuale d’uso / di manutenzione del prodotto A/S-4 del fabbricante Black Box
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FCC ST A TEMENT 1 FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS This equipment generates, uses, and can radiate radio-frequency energy , and if not installed and used properly , that is, in strict accordance with the manufacturer’ s instructions, may cause inter ference to radio communication.
PROTOCOL CONVER TER MODEL A/S-4 2 INSTRUCCIONES DE SEGURIDAD (Normas Oficiales Mexicanas Electrical Safety Statement) 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
TRADEMARKS 3 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the pr oper ty of the trademark owners..
PROTOCOL CONVER TER MODEL A/S-4 4 Contents Chapter Page 1. General Information ................................................................................................................................6 2. A/S-4 Specifications ..................
CONTENTS 5 Chapter Page 6.12 Printer Options ..........................................................................................................................45 6.13 V erify Switch Settings ....................................................
PROTOCOL CONVER TER MODEL A/S-4 6 1. General Information THE A/S-4 is an SNA protocol converter . It is capable of a wide variety of conversions and adaptation tasks.
CHAPTER 1:General Information 7 The A/S-4 is a 3274 work-alike controller emulating a PU2 with one LU2 terminal and one LU1 or LU3 printer . This allows an ASCII terminal or micro computer to emulate a 3278 CRT with a 3278 printer .
PROTOCOL CONVER TER MODEL A/S-4 8 2. Specifications Standard and Nonstandard Baud Rates: 50, 75, 110, 134, 150, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 7200, 9600, 19.
CHAPTER 3: Installation 9 3. Installation 3.1 General Installation The A/S-4’ s options are set by the operator through the use of menus and switches. The A/S-4 provides a very flexible package of options so as to work with any terminal or terminal emulating device (such as a personal computer).
PROTOCOL CONVER TER MODEL A/S-4 10 3.4 Power T ransformer The A/S-4 is shipped with a transformer for the standard USA 110-V AC outlet plug. A substitute transformer may be ordered for the for 220 V AC or other voltages. A conversion plug for different power outlets is the responsibility of the purchaser .
CHAPTER 4: Switches 11 4. Switches The A/S-4 is equipped with 8 banks of DIP switches, all of which are accessed from the bottom of the unit. The general functions of these switches are as follows: Te.
PROTOCOL CONVER TER MODEL A/S-4 12 Switch Bank S3, Switch: 1-On connects pin 2 of connector to A/S-4’ s output of T ransmit Data, for attaching DCE devices 2-On connects pin 3 of connector to A/S-4.
CHAPTER 4: Switches 13 7 8 9 10 BAUD RATE ON ON ON ON 50 ON ON ON OFF 75 ON ON OFF ON 110 ON ON OFF OFF 134.5 ON OFF ON ON 150 ON OFF ON OFF 300 ON OFF OFF ON 600 ON OFF OFF OFF 1200 OFF ON ON ON 1800 OFF ON ON OFF 2000 OFF ON OFF ON 2400 OFF ON OFF OFF 3600 OF OFF ON ON 4800 OFF OFF ON OFF 7200 OFF OFF OFF ON 9600 OFF OFF OFF OFF 19.
PROTOCOL CONVER TER MODEL A/S-4 14 4.2 How to Set T erminal Port Switches for Different Devices DEVICES VDU or Async Modem Centronics Tally printer “Y” VDU, DTE or DCE device Printer Data Products.
CHAPTER 4: Switches 15 SW6/ 7 8 9 10 BA UD RA TE ON ON ON ON 50 ON ON ON OFF 75 ON ON OFF ON 110 ON ON OFF OFF 134.5 ON OFF ON ON 150 ON OFF ON OFF 300 ON OFF OFF ON 600 ON OFF OFF OFF 1200 OFF ON ON ON 1800 NOTE: Baud Rate OFF ON ON OFF 2000 selection has no OFF ON OFF ON 2400 effect if T erminal OFF ON OFF OFF 3600 Speed Detect is selected.
PROTOCOL CONVER TER MODEL A/S-4 16 Switch Bank S5, Switch: 1-On connects pin 2 of connector to A/S-4’ s output of T ransmit Data, for attaching DCE devices 2-On connects pin 3 of connector to A/S-4.
CHAPTER 4: Switches 17 4.4 How to Set Modem Port Switches for Different Devices DEVICES ASYNC MODEM SYNC MODEM FRONT END PR OCESSOR Switch 4 Switch 4 Switch 4 1 OFF 1 OFF 1 OFF 2 ON 2 ON 2 OFF 3 OFF 3.
PROTOCOL CONVER TER MODEL A/S-4 18 4.5 Option Switches Switch Bank S8, Switch: 1-RESERVED 2-RESERVED 3-RESERVED 4-RESERVED 5-RESERVED 6-RESERVED 7-RESERVED 8-RESERVED 9-On connects pins 9 on both terminal and modem connectors to +10 V olts DC. 10-On connects pins 10 on both terminal and modem connectors to -10 V olts DC.
CHAPTER 5: LED Indicator 19 5. LED Indicator The front of A/S-4 enclosure provides 10 light emitting diodes (LED) indicators. The indicators are arranged and labeled in the following order , from left to right.
PROTOCOL CONVER TER MODEL A/S-4 20 6. Power Up and Configuration Menu Operations The A/S-4 unit options are mainly set by the operator through the use of menus. The A/S-4 provides a very flexible package of options so to allow any VDU to operate like an IBM 3278 terminal and an IBM 3287 printer or a 3770 work station.
CHAPTER 6: Power Up and Configuration Menu Options 21 6.2 Power Up Message The A/S-4 sends out the message in Figure 1 on power up or the raising of DTR (DA T A TERMINAL READY) on the terminal device.
PROTOCOL CONVER TER MODEL A/S-4 22 6.3 A/S-4 Main Menu A set of menus are used to configure the A/S-4’ s options so that it will operate properly with the particular VDU and host to which it is connected. In order to access these menus, SW9/6 must be in the ON position (see Section 4.
CHAPTER 6: Power Up and Configuration Menu Options 23 The input allowed at this menu is one letter A thru J so to run or change an option. Listed below is a brief description of what each letter gives you access to, refer to the section listed for more details.
PROTOCOL CONVER TER MODEL A/S-4 24 2. Modem connected to host but LU inactive; if the LU is inactive the A/S-4 will display “W AITING FOR LU TO COME ACTIVE”. The LU should come active after a few seconds of this message appearing on the VDU. If the LU does not come active, then one of the following problems may exist: A.
CHAPTER 6: Power Up and Configuration Menu Options 25 6.5 Changing the VDU T ype If the current VDU type displayed at the top of the A/S-4 Main Menu does not match the VDU or VDU emulation package you have connected to the A/S-4, you may change the VDU type by entering the letter “B” in response to the Main Menu.
PROTOCOL CONVER TER MODEL A/S-4 26 NOTE Selection of a blank pr ogrammable VDU type ma y cause erroneous command character s to be sent to the operators VDU .
CHAPTER 6: Power Up and Configuration Menu Options 27 6.6 Changing VDU Commands for the VDU T ype Selected By selecting item C from the main menu (Section 6.3), the operator obtains the menu shown in figure 5. Items from this menu can only be changed for programmable VDUs.
PROTOCOL CONVER TER MODEL A/S-4 28 6.7 Changing Video Attributes and Commands for VDU The menu obtained by selecting item D of the main menu is shown in Figure 7. This menu allows the operator to define the parameters which will give the proper video highlighting to the fields on the VDU screen.
CHAPTER 6: Power Up and Configuration Menu Options 29 The general format of a video command to a VDU is as follows: ESC X Y Z Start of video cmd. Middle of video cmd. nd of video cmd. X, Y and Z represent ASCII characters. The end of video command may not be necessary and therefore displayed as a blank.
PROTOCOL CONVER TER MODEL A/S-4 30 A/S-4 Standard Keyboard Layout ESC ! 1 @ 2 # 3 $ 4 % 5 ^ 6 & 7 * 8 ( 9 )0 _ - + = DEL LINE TAB Q W E R T Y U I O P { [ } ] RETURN PFI PF2 PF3 PF4 PF5 PF6 PF7 PF8.
CHAPTER 6: Power Up and Configuration Menu Options 31 IBM PC Keyboard Layout ~ ` ! 1 @ 2 # 3 $ 4 % 5 -- 6 & 7 * 8 ( 9 ) 0 _ - + = PF1 PF2 PF3 PF4 PF5 PF6 PF7 PF8 PF9 PF10 PF11 PF12 QW E R T Y UI O.
PROTOCOL CONVER TER MODEL A/S-4 32 ADM 1178 Keyboard Layout.
CHAPTER 6: Power Up and Configuration Menu Options 33 IBM 3101 Keyboard Layout.
PROTOCOL CONVER TER MODEL A/S-4 34 PNS Keyboard Layout.
CHAPTER 6: Power Up and Configuration Menu Options 35 6.8 Changing Keyboard Layout T ype By selecting E from the main menu, the menu shown in Figure 8 is obtained. This is used to select the specific keyboard mapping the operator desires. Selection of F , G and H provide fixed keyboards shown on the previous pages.
PROTOCOL CONVER TER MODEL A/S-4 36 6.9 Changing Keys Arrangements on a Particular Keyboard Layout T ype Selection of item F from the main menu will cause the menu shown in Figure 9 to be displayed.
CHAPTER 6: Power Up and Configuration Menu Options 37 6.9.1 PF K EYS Selection of item B from the menu shown in Figure 9 will cause the menu shown in Figure 10 to be displayed. If the operator wants to use a different key for PF2, he would first enter the letter “C” and then enter the new value(s) in response to prompt(S) for the new value(s).
PROTOCOL CONVER TER MODEL A/S-4 38 6.9.2 P A K EYS Selection of item C from the menu shown in figures 9 will cause the menu shown in figure 11 to be displayed.
CHAPTER 6: Power Up and Configuration Menu Options 39 6.9.4 IBM K EYS Selection of item E from the menu shown in figure 9 will cause the menu shown in figure 13 to be displayed.
PROTOCOL CONVER TER MODEL A/S-4 40 The functions of the A/S-4 Keys are as follows: Restart Protocol Jump to A/S-4’ s main menu for Converter option changes.
CHAPTER 6: Power Up and Configuration Menu Options 41 6.10 Changing Application The A/S-4 is shipped from the factory to power up in the SDLC/SNA 3274/76 Interactive mode of operation. The current mode of operation can be determined by looking at the top of the main menu, as in Figure 14 (it is Interactive).
PROTOCOL CONVER TER MODEL A/S-4 42 6.11.1 C HANGING I NTERACTIVE A PPLICA TION O PTIONS The change Application menu allows 8 operations as described below: A. Exit - By entering the letter A the A/S-4 will return to the Main Menu. B. XID - By entering a B the operator is able to change the A/S-4 SDLC control unit identifier .
CHAPTER 6: Power Up and Configuration Menu Options 43 G. PR T LU Addr - By entering a G the operator can select which LU’ s data will go to the printer attached to the A/S-4’ s terminal port. Selection of this address is done the same as for the VDU LU addr above.
PROTOCOL CONVER TER MODEL A/S-4 44 6.11.2 C HANGING B A TCH A PPLICATION O PTIONS The change Application menu allows 16 operations as described below: A thru G - are the same as for changing Interactive options, refer to section 6.11.1 for details. H.
CHAPTER 6: Power Up and Configuration Menu Options 45 N. VDU Auto Logon Msg - This 80 character message can be changed by entering the letter N followed by the Logon message, containing any printable ASCII character (X`20’-X`7F’).
PROTOCOL CONVER TER MODEL A/S-4 46 These new values, if received from the host would then be sent to the printer if the G-Start Char -FORMS or K-Start Char -DENSITY are selected.
CHAPTER 6: Power Up and Configuration Menu Options 47 D. Lines Per Inch (xxx) - By entering the letter D, followed by any decimal number from 001 to 063, the operator can change the lines per inch (LPI) the printer will print. If a decimal value larger than 063 is entered, the LPI option will be set to a value less than 063.
PROTOCOL CONVER TER MODEL A/S-4 48 P ROGRAMMABLE P RINTER O PTIONS Print data received from the host or printed by a local print function will be formatted by the values set in the Printer Options menu (e.g. Column Width, Lines Per Page, Single spacing).
CHAPTER 6: Power Up and Configuration Menu Options 49 The following is an example of setting the printer for 8 lines per inch. ESC, 8 - OKI Microline 83A command to set 8 LPI Printer Options Menu sett.
PROTOCOL CONVER TER MODEL A/S-4 50 The V erify Switch Settings menu allows 2 operations as described below: A. Exit - By entering the letter A the A/S-4 will return to the Main Menu. B. Restart With New Switch Options - When a B is typed and he A/S-4 will start over , just like the power has been turned off and then on.
CHAPTER 7: Interactive Operation 51 7. Interactive Operation The A/S-4 operating in the Interactive mode, emulates an IBM 3274/76 cluster controller with a single LU T ype 2 terminal IBM 3278 and an IBM 3287 LU T ype 1 or 3 printer .
PROTOCOL CONVER TER MODEL A/S-4 52 8. Batch Operation The A/S-4 operating in the Batch mode, emulates an IBM 3776/77 Model 3 and 4 multiple logical unit (MLU) work station with a console, printer , card reader/punch and exchange diskette attached. The A/S-4 supports two of the six possible logical units available for a MLU work station.
CHAPTER 8: Batch Operation 53 8.1 Receiving Batch Data from the SNA host When SNA data is received from the host by the A/S-4, the data is sent to the VDU as follows: Star t Special End of VDU CMD De vice On of File Control File VDU 1 2 3 STX 4 5 Data 6 ETX 1 CMD De vice Off 7 1.
PROTOCOL CONVER TER MODEL A/S-4 54 b. SI ($0F) character precedes the SNA line status report of each logical unit. This line status is handled as console data so the VDU CMD and device selection are not sent along with this message. The line status is reported as follows: SOF SC 1 2 3 4 EOF STX 0F 3 3 CR LF LU , LU CR LF ETX Character Number: 1.
CHAPTER 8: Batch Operation 55 8.2 T ransmitting Batch Data to the SNA Host T o send data to the SNA computer , the data from the VDU should look like this: Device Selection Start or End of Special of File Control File 1 STX 2 3 Data 4 ETX 1. Start of File (SOF) character is selected by H Application Options menu.
PROTOCOL CONVER TER MODEL A/S-4 56 2) SI (X`0F’) character asks the A/S-4 for the SNA line status of each Logical Unit. The response to the SI is described in the transmission of the SI character as a special control character . Any data following the SI character will be thrown away until a Start of File is received.
CHAPTER 8: Batch Operation 57 When sending data to the printer each character is inspected and then sent if needed. A column count is kept to determine the position of the printer’ s print head which is compared to the selected column width of the paper .
PROTOCOL CONVER TER MODEL A/S-4 58 8.4 Batch Default Options The A/S-4 has the capability of loading all it’ s Batch options from the VDU (computer) without going through any menus. This is done by receiving the shift out (X’0E;) character followed by the options selected in hexadecimal form.
CHAPTER 8: Batch Operation 59 BYTE DEF AUL T (continued) 14 01 LU ADDRESS CUSTOMER OPTION A 15 81 BIT 7 - TERMINA TE MESSAGE TO VDU ON: 1-END OF CHAIN 0-END OF BRACKET 6 - SEND FMH-2 TO VDU 5 - 4 - 3 .
PROTOCOL CONVER TER MODEL A/S-4 60 BYTE DEF AUL T (continued) 3 - 2 - 1 & 0 - LU TYPE (1, 2, OR 3) 24 08 PROTOCOL, 08=ASYNC ASCII *** INBOUND LU XFR *** 25 00 CHAR OPTION (NOT USED) 26 03 LU ADDRE.
CHAPTER 8: Batch Operation 61 BYTE DEF AUL T (continued) 3 - 2 - 1 & 0 - LU TYPE (NOT USED) *** APPLICA TION OPTIONS *** 33 C553 DEF AUL T CR T = ASCII ST ANDARD, VT100 C513 = IBM 3101 C5D3 = LEAR.
PROTOCOL CONVER TER MODEL A/S-4 62 BYTE DEF AUL T (continued) 217 20 2nd Start Char-DENSITY 218 20,20 Multiple character 220 00 Separator Char (FORMS) 221 00 Separator Char-DENSITY 222 00 Final Char (.
CHAPTER 9: Batter y RAM 63 9. Batter y RAM All operating parameters selected from the configuration menus are saved in battery backed-up RAM (Random Access Memory). Therefore, if AC power to the A/S-4 is interrupted, it is unnecessar y to reenter the parameters previously selected.
PROTOCOL CONVER TER MODEL A/S-4 64 10. Maintenance The A/S-4 is designed to per form all of its tasks with maintenance free operation. Y ou may prolong the life of the unit by cleaning any dust build-up in the unit. Dust may be removed by blowing and/or brushing with a long bristle paint brush.
CHAPTER 11: Software Upgrade and EPROM Replacement 65 11. Software Upgrade and EPROM Replacement Each EPROM has a label affixed to the top containing an address and the current data of the software in the IC. T o replace the old EPROM with the new EPROM, follow the procedure below: 1.
PROTOCOL CONVER TER MODEL A/S-4 66 12. System/Line Gen for Batch The following is a VT AM/NCP/JES2 line gen for a 3776 model 3 or 4. For more information on specific parameters, refer to the appropriate IBM manuals.
CHAPTER 12: System/Line Gen for Batch 67 TRANSFER = 7 MODET AB = INSTINCLM Name of table used by VT AM for line bind parameters SSCPFM = USSSCS 3770 RJE log-on is a character -coded log-on VP ACING = .
PROTOCOL CONVER TER MODEL A/S-4 68 USST AB = RJEINCDT T able used by VT AM to interpret user logons VP ACING = 6 VT AM sends 6 RUs to NCP before response IST A TUS = ACTIVE LU comes up active, can be .
CHAPTER 12: System/Line Gen for Batch 69 W AITIME = 01 Number of seconds between completion of printing before JES will initialize print of the next output data set —————— PRINTER A TT ACHED TO 3776 ——————- Rnnn.
PROTOCOL CONVER TER MODEL A/S-4 70 —————— PUNCH A TT ACHED TO 3776 ——————- Rnnn.PU1 SNA Remote Punch one OPERA TOR CCTL CKPTLNS = 100 Number of cards to be punched per logical page CKPTPGS = 10 CLASS = C(1).
CHAPTER 12: System/Line Gen for Batch 71 PUDEST = 0 PULCL PUNODE XEONODE = ——————- LINE ——————- LINEnnn Line number ADISCON CODEA COMP EBCDIC EBCDIC character code IF ACEA LOWS.
PROTOCOL CONVER TER MODEL A/S-4 72 &NUMTPBF = nnn Number of JESX Data Communications Buffers &PR TRANS = YES Print Line T ranslation Option, looks for chars less than X ‘40’ and if so sends data as transparent * Option not supported (1) Option determined by max RU size.
CHAPTER 12: System/Line Gen for Batch 73 The following is a copy of the suggested USST AB table for use by the A/S-4. RJEINCDT USST AB LOG USSCMD CMD=LOGON,REP=LOGON,FORMA T=BAL USSP ARM P ARM=P1,REP=.
PROTOCOL CONVER TER MODEL A/S-4 74 13. T roubleshooting Problems and Odd Installation Problems Listed below are some of the common problems found with installation and operation of the A/S-4 unit. Find the problem you are experiencing and try the remedies listed to fix the problem.
CHAPTER 13: T roubleshooting Problems and Odd Installation Problems 75 PROBLEM SYMPTOM POSSIBLE REMEDIES TCTS light is on and a. Baud rate of A/S-4 TTX light does blink does not match ter minal when pow er is applied baud rate. Chec k baud to the A/S-4 rate s witches, ref er to Section 4.
PROTOCOL CONVER TER MODEL A/S-4 76 Appendix A: 3274 SNA Communication Operations This appendix is intended to give a VDU operator the basic description of the System Network Architecture (SNA) for a 3278 CR T (or like device) in the area of remote communications.
APPENDIX A: 3274 SNA Communication Operations 77 NOTE Some applications may not send a welcome messa ge . The operator m ust send the first message to start the transactions. 8. After the operator has finished working, he should signoff the application.
PROTOCOL CONVER TER MODEL A/S-4 78 Appendix B: General 3770 SNA Communication Operations This appendix is intended to give a basic description of the System Network Architecture (SNA) operation for an IBM 3776/77 Model 3 and 4 multiple logical unit (MLU) work station in the area of remote communications.
APPENDIX B: General 3770 SNA Communication Operations 79 8. After the operator has finished working, he should signoff the application. The system will UNBIND all the LUs from the host system so that the work station and application are no longer communicating with each other .
PROTOCOL CONVER TER MODEL A/S-4 80 Appendix C: Conversion Char ts The following pages contain the EBCDIC-to-ASCII Character conversion chart. Characters under the “RECV” heading are the EBCDIC characters received from the SNA host. The ASCII equivalent is to the right under the “CONV” column.
APPENDIX C: Conversion Charts 81 EBCDIC-to-ASCII Character Conversion EBCDIC-to-ASCII EBCDIC-T O-ASCII RECV CONV PR T CONV RECV CONV PR T CONV 00-NUL 00-NUL 20-SP 20-DS 00 THW 01-SOH 01-SOH THW 21-SOS.
PROTOCOL CONVER TER MODEL A/S-4 82 EBCDIC-to-ASCII EBCDIC-T O-ASCII RECV CONV PR T CONV RECV CONV PR T CONV 40-SP 20-SP 20-SP 60- 2D- 2D- - 41- 00- 00- 61- 2F-/ 2F-/ 42- 00- 00- 62- 00- 00- 43- 00- 00.
APPENDIX C: Conversion Charts 83 EBCDIC-to-ASCII EBCDIC-T O-ASCII RECV CONV PR T CONV RECV CONV PRT CONV 80- 00- 00- A0- 00- 00- 81-a 61-a 61-a A1-~ 7E-~ 7E-~ 82-b 62-b 62-b A2-s 73-s 73-s 83-c 63-c 6.
PROTOCOL CONVER TER MODEL A/S-4 84 EBCDIC-to-ASCII EBCDIC-T O-ASCII RECV CONV PR T CONV RECV CONV PR T CONV C0-{ 7B-{ 7B-{ E0- 5C- 5C- C1-A 41-A 41-A E1- 00- 00- C2-B 42-B 42-B E2-S 53-S 53-S C3-C 43-.
APPENDIX C: Conversion Charts 85 The following chart is the ASCII-to-EBCDIC character conversion chart. Data received from the VDU in ASCII format is found in the “RECV” column and when the specific character is transmitted to the SNA host it will appear as described in the “CONV” column.
PROTOCOL CONVER TER MODEL A/S-4 86 ASCII-to-EBCDIC ASCII-to-EBCDIC RECV CONV RECV CONV 40-@ 7C-@ 60-` 79-` 41-A C1-A 61-a 81-a 42-B C2-A 62-b 82-b 43-C C3-C 63-c 83-c 44-D C4-D 64-d 84-d 45-E C5-E 65-.
1000 P ark Drive • Lawrence, P A 15055-1018 • 724-746-5500 • F ax 724-746-0746 © Copyright 1989. Black Box Corporation. All rights reserv ed..
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Black Box A/S-4 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Black Box A/S-4 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Black Box A/S-4 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Black Box A/S-4 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Black Box A/S-4, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Black Box A/S-4.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Black Box A/S-4. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Black Box A/S-4 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
