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Toshiba Perception 1 2 User Manual

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    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    CHART NO. 24 
    DATA COMMUNICATION TRUNK FAULTS (continued) 
    NO 
    one unit been 
    Replace, as a group, 
    all the units that 
    replaced separately. 
    1 
    NO 
    than two units 
    I I YES 
    - Replace original 
    units, one by one. 
    - If trouble occurs, 
    replace the 
    suspected unit. 
    I 
    I YES 
    Make a note of 
    all NMDU PCBsl 
    ports that have 
    been disabled. 
    I t 
    - From now on 
    when a re-load/ 
    power-up is done, 
    redisable all above 
    NMDU PC&/ports. 
    * When the fault is 
    corrected, enable 
    all disabled NMDU 
    PCBS ports. NO 
    1 YES 
    Call the Service 
    23 END 
    -48-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    EXPANSION CABINET 
    -24V 
    -24V 
    -24V 
    -24V 
    5701 
    q u 
    q u 
    q 
    q q 
    q q G SIG2 
    G 
    RNG CK 
    G 
    -48V 
    G 
    G 
    5702 
    SACK UP 
    AC DOWN 
    -24V 
    -24V 
    -24V 
    5201 
    BASIC CABINET 
    5703 
    +5v 17 q G 
    5202 
    -48V q q G 
    / 
    5203 
    G 
    G 
    -5v 1 q o)G 
    FIGURE 2 - PECEPTION, POWER SUPPLY VOLTAGE CHECKS 
    -5o-  
    						
    							FAULT FINDING 
    SECTION 200-255-500 
    MARCH 1991 
    EXPANSION CABINET 
    J701 
    EXPANSION CABINET 
    AC DOWN 
    BACK UP 
    -24” 
    -24” 
    -24” 
    -24v 
    -24v 
    -24” 
    -24-d 
    -24v 
    -24” J201 
    00 
    on 
    no 
    00 
    q u 
    no 
    on 
    00 
    on 
    00 
    00 
    PSA-M 
    G 
    G 
    G 
    G 
    G 
    G 
    G G 
    SIG 1 
    SIG 2 
    SIG 1 
    SIG 2 
    G 
    J203 G 
    JBO3 
    G 
    -w 0 0 G 
    G 
    -5v 0 n +5V 0 0 G 
    G +SJ 10 G 
    G 
    G 
    G J703 
    -5~ 17 0 G 
    G 
    -9 
    G n q 
    +SJ 0 i3 G 
    G 
    +5V 0 0 G 
    FPSA ACCEPTABLE VOLTAGE RANGES 
    NOMINAL (VDC) 
    RANGE (VDC) 
    -48 -47.52 - 48.96 
    -24 -26.75 - -28.12 
    +I2 +11.76 - +12.48 
    -12 -11.76 - -12.48 
    +5 +5.0 - +5.4 
    -5 -5.0 - -5.4 
    FIGURE 3 - PECEPTION ex POWER SUPPLY VOLTAGE CHECKS 
    -51-  
    						
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