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-