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Toshiba Perception 1 2 User Manual

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    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 20 
    RlNGlNGlRlNGBACK TONE FAULTS 
    Fault Classification Go to Page 4 
    to classify 
    fault. 
    To 
    faulty at electronic/digital 
     
    NO 
    J 
    Replace any 
    faulty standard 
    telephone(s). Replace the NSTU 
    replaced SlT/2500- 
    Measure the ringer 
    voltage at the 
    backplane (between 
    pins 26 & 26). 
    Tag the 
    defective unit(s) 
    and return 
     creareo? 
    / for repair. 
    I 
    ( END ) Call the Service 
    Center for 
    assistance. 
    -38-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 20 
    RINGING/RINGBACK TONE FAULTS (continued) 
    From 
    s2 
    Pages 
    14,38 
    I-;’ 
    Remove all 
    NSTUs and 
    the NPRU. 
    - Reinstall all PCBs, 
    one at a time. 
    . Note any failure 
    (ringer voltage out 
    of spec) and replace 
    the suspected PCB. 
    PCB also cause 
    1 
    Call the Service Tag the 
    defective L 
    -39-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 21 
    MISCELLANEOUS FAULTS 
    From  From I Ha? 
    more tl 
    one unit been  one unit 
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 22 
    NMDWNDCU FAULTS 
    From n 
    here from 
    the 
    Fault Classification 
    Either leave the 
    circuit(s) disabled 
    or enable them as 
    required. 
    -41-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 22 
    NMDUINDCU FAULTS (continued) 
    NOTES: 
    7. Verify that T & R 
    are not reversed. 
    2. This question also 
    refers to combined 
    electronic telephone/DDIUs. 
    I YES 
    NOTE: If any NMDU/ 
    I.““” *, AfnP’ ’ -ircuit(s) is/are 
    still disal 
    5ted, the fault 
    -t  indicates 
    : something ,, 
    besides / disabled state. ‘ 
    ‘ 
    ‘ Using the TPER Program, disable 
    and then enable the 
    corresponding 
    faulty circuits. 
    . I 
    ‘ 
    ‘. 
    . 
    ‘ 
    ‘. 
    A 
    Replace the NMDU/ 
    NDCU PCB with 
    the FALT LED & 
    indication. 
    Tag the defective 
    unit and return 
    for repair. 
    i 
    END -YES 
    -42-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 23 
    DATA COMMUNICATION STATION FAULTS 
    / Did  I I 
    Y 1 
    NO 
    Concentrate on 
    on stations assigned 
    to the same PC6 
    NOTE: Consult ‘ES 
    NO 
    . Verify that the DTR control 
    signal is active (Sep DIU = 
    Terminal Ready LED on). 
    . Verify the station’s W-232 cable. 
    - Verify that the DIU DTUModem and 
    Mode switches are correctly set. 
    . Verify that the computer/ 
    terminal works properly. 
    . Verify that the Baud rate 
    and data format are compatible. 
    - Correct if faulty. 
    To 
    Jl 
    0 
    Page 48 Tag the 
    defective unit(s) 
    and return 
    23 END 
    -43-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 23 
    DATA COMMUNICATION STATION FAULTS 
    (continued) 
    From From 
    4 NO 
    TO 
    - 
    I 1 - Verify that the DTR contrc 
    signal is active. 
    (Sep DIU = Terminal 
    Ready on.) 
    - Verify the station’s RS- 
    232 Cable. 
    - Verify that the computers/ 
    terminals work properly. 
    - Verify that the Baud rates 
    and data formats are 
    compatible. 
    - Verify that the Mode 
    Switch and the DTE/ 
    Modem switch are 
    set correctly (DDIU- 
    MAT and DDIU-MA) 
    . Correct if faulty. 
    1 
    EAFLFy cleared? appropriate station 
    (NDCWNDKU) PCS 
    ci END 
    -44-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 24 
    DATA COMMUNICATION TRUNK FAULTS 
    Go to Page 4 
    to classify 
    fault. 
    To 
    - Verify that the computer/terminal 
    Baud rate and data format are 
    compatible with the distant end. 
    . If synch data is used, verify that 
    the DIU mode switch is set correctly. 
    . Correct if incompatible. -----_--___ p 
    To 
    Tag the 
    defective unit 
    and return 
    for repair.  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 24 
    DATA COMMUNICATION TRUNK FAULTS (continued) 
    Page 45 
    v 
    I 
    Using the TPER Program, 
    disable all NMDU PCBs, 
    except the one at 
    the lowest PCB 
    location number. Concentrate on 
    clearing faults 
    related to one 
    NMDU PC0 
    location. 
    than one NMDU 
    Using the TPER Program, 
    disable all NMDU PCBs 
    except the next one that 
    is numerically higher than 
    7 
    the NMDU last verified 
    as free from faults. 
    I ,’ 
    I 
    YES - 
    a’ ‘ 
    8’ ‘ 
    ‘* 
    wr To@ 
    the NMDU PCB that is still enabled. 
    -46-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    ( 
    i CHART NO. 24 
    DATA COMMUNICATION TRUNK FAULTS (continued) 
    no other call 
    intetferes on this 
    port during tests. 
    . Verify that the Baud 
    rate and data format 
    are compatible to the 
    distant end. 
    . Verify that the DTE/ 
    MODEM switch is 
    set to MODEM. 
    . If synch data is used, 
    verify that the DIU 
    mode switch is set 
    correctly. 
    . Verify that the modem 
    is compatible. 
    . Verify that the DIU 
    and modem cables are 
    properly connected. 
    (See section ZOO-25C 
    200. Installation.) 
    . Verify that the DIU and 
    modem power is on. 
    . Correct if faultv. From 
    Tl 
    Page 46 
    -2 
    Using the TPER Program, 
    disable all ports (except 
    the lowest used port no.) 
    of the respective (enabled) 
    NMDU PCB 
    i YES 
    Enable the next 
    Disable the port that 
    was last verified to 
    be free of faults. 
    r This NMDU PCB 
    (with related 
    circuits) is free 
    of faults. 
    Correct similar 
    faults on 
    other NMDU port(s). Is  NO 1 -%?:::? .- 
    the fault 
    cleared? / I 11115 purL (“wry 
    compatibility.) 
    I 
    Re-enable all 
    disabled NMDU 
    PCBslports. Tag the 
    defective unit 
    and return 
    for repair. YES 
    c+ END 
    -47-  
    						
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