Toshiba Perception 1 2 User Manual

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 1 
FAULT CLASSIFICATION (continued) 
I NO 
it an Attendant 
Access to Services), 
Fault should have 
been classified. 
Return to Page 4. YES 
YES 
indications appear on 
I NO  

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 1 
FAULT CLASSIFICATION (continued) 
NOTE: From here 
on, the flowchart 
i 
regards Voice Comm. 
faults only. 
1 ’ 
Fault should 
classified. Return 
To Attendant Console 
1 NO 
To 
Page 22 
u 
-8-  

FAULT FINDING 
SECTION 200-255-500 
MARCH1991 
CHART NO. 2 
LOADING FAULTS 
here from the 
Fault Classification Go to Page 4 
to classify 
fault. 
YES NO 
Replace the IS 
NPRU. YES 
the fault 
cleared? 
y-u:-: NO 
To 
‘OF3 - NO 00 
(Page lo/- ., ‘s Page 40 
me Taulr 
cleared? 
Replace the 
LCCU. 1 YES 
Tag the 
defective unit(s) 
and return 
for repair. 
-9-  

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
Replace the 
LCCU. 
Replace the 
NPRU and LCCU 
with a known 
good pair. Tag the NPRU 
as defective. 
Do not reinsert. 
CHART NO. 2 
LOADING FAULTS 
(continued) 
Replace the 
disk with a 
back-up disk. 
Press the LOAD 
key momentarily. 
Verify that loading NOTE: See Section 
mo- 100-200, 
Paragraphs 7.01 and 7.02. 
/ Does  1 Tao the I 
Measure all DC 
Supply voltages 
on the backplane. ..1 
IO 
A4 
0 
Page 11 
-lO-  

Tag the NPRU and 
LCCU as defective. 
Do not reinsert. 
FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 2 
LOADING FAULTS (continued) 
Tag the 
defective unit(s) 
and return 
for repair. Call the Service 
-ll-  

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
Start here to 
c/ear Power 
faults. 
CHART NO. 3 
POWER FAULTS 
From 
0 
1 
0 
Page 4 
here from the 
Fault Classification 
Switch the main 
circuit breaker 
to OFF and then 
back to ON. Go to Page 4 
to classify 
fault. 
x Are Fromm 
I NO 
I 
circuit breaker Switch the main 
circuit breaker 
to OFF. 
Open the rear 
cabinet connection 
plate. 
i 
Disconnect the DC 
power supply cables to 
J201,5202, J203 
and J703 
(PERCEPTION,) or to 
5201, J202.5203.5703...

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 3 
POWER FAULTS (continued) 
If the problem is 
in an Expansion 
Cabinet, a/so 
- - -  disconnect power 
SUDD/V cab/es 
I 
Jk’ and J702, Replace the 
power supply. 
Tag it and return 
for repair. 
Switch power to 
OFF and reconnect 
the DC cables to 
5201,5202,5203, 
and 5703 
(PERCEPTION,) or to 
J201,5202,5203, 
5703, and J803 
(PERCEPTION,,). f END  Remove the 
NFDU. 
Remove all 
PCBs. 
1 . - If this is a power supply 
“LED off” fault, press...

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 4 
RINGING POWER FAULTS 
you arrive Go to Page 4 
here from the 
W fault.’  to classify 
Fault Classification 
Measure the 
-l 
ringer voltage at 
the backplane, 
between pins 4 
and 6. 
I 
The NFDU or 
LCCU has a faulty 
indicator. Replace 
the defective unit 
at a convenient 
-14-  

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 5 
TIME SWITCH CLOCK FAULTS 
IMPORTANT: 
This step will halt all call 
processing. It is 
advisable to wait until all 
trunks and stations are idle 
before performing this step. 
NoMy system users that the 
system will be temporarily down. * Replace the NTWU. 
* Verify that the 
clock LED is 
flashing. 
Tag the 
defective unit(s) 
and return 
for repair. 
-15-  

FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 7 
NRCU FAULTS 
Go to Page 4 
to classify 
fault. 
Either leave the 
circuit(s) disabled 
or enable as Using the TPER 
Program, disable 
and then enable 
the corresponding 
faulty circuit(s). 
-1. _ _ _ _ __ -Qf=!ipW=--) 
NO 
TO 
0 AA 
Page 5 e3 END 
-17-