Toshiba Strata E Electronic Key Telephone System Installation And Maintenance Manual

rHULl rlNUlNLJ 
SECTION 500-036-500 
JANUARY 1988 
From 
Pl 
0 Page 7 
CHART NO. i 
POWER FAULTS 
(cont.) 
c 
1 YES 
l Reinstall PCBs, 
one at a time, 
l Take note of 
failure if it 
occurs and replace 
that PCB. 
l Be sure to 
switch power 
off before a 
PCB is inserted. 
I 
Tag defective 
PCBfsi and return Tag defective 
H KSU and 
return for repair. From 
P2 
0 
Page 7 
.*- 
l Check power supply fuses and 
AC source. 
l Replace or repair 
as necessary. 
NO 
l Replace power 
SUPPlY. 
l Tag defective...

CHART NO. 3 FAULT FINDING 
SECTION 500-036-500 
_ JANUARY 1988 
From STATION FAULTS 
here from the Go to Page 4 
fault. .*- 
YES Replace HMDB 
* on appropriate 
EKT. 
Replace 
HVSU I” EKT. Replace the 
EKT. 
To 
NO 
YES From 
Replace 
Replace 
appropriate appropriate 
svcu. SSTU. 
YES 
END NO  

tAULI t-INUINli 
SECTION 500-036-500 
JANUARY 1988 
CHART NO. 4 
HKSU FAULTS 
From 
Starr here to 
rlr..- YYP,, a=.,,,*^ cm-- ------ 1 
present at EKT? 
SEPU, SMOU. 
l Reinstall all 
YES PCBs, one at 
w a time. 
l If trouble occurs, 
replace suspected 
PCS. 
-lO- 
. .  

CHART NO. 5 
CO LINE FAULTS 
From 
here from the NO Go to Page 4 
to classify 
fault. 
NO 
I appropriate 
HCNB. 
I 
YES 
FAULT FINDING 
SECTION 500-036-500 
_ JANUARY 1988 
NOTE: 
Verify before 
proceeding: 
l Correct CO/PBX 
line operation 
return for repair. 
-ll-  

s e-a”&, I I,.“#..” 
SECTION 500-036-500 
JANUARY 1988 
CHART NO. 6 
MOH FAULTS 
From 
Start here to 
here from the 
Fault Classification NO Go to Page 4 
* to cl assi fy .*- 
fault. 
l Verify external 
equipment. 
NO 
I 
Replace the 
scou/vcou. NO 
Call the Service 
Center for 
assistance. 
23 END 
-12-  

YES 
Replace SEPU or 
external amplifier. 
CHART NO. 7 
PAGE/BGM FAULTS FAULT FINDING 
SECTION 500-036-500 
_ JANUARY 1988 
here from the 
Fault Classification Go to Page 4 
fault. 
l Verify external 
equipment. 
1 l Verify programming. 
NOTE: 
I--------- !“:!  Lii!%gx:; 
J YES 
Call the Service 
Center for 
assistance. 
Tag defective 
PC6 and return YES NO Call the Service 
4 
Center for 
for repair. assistance. 
I 
-13-  

I-AULT FINDING 
SECTION 500-036-500 
DECEMBER 1986 
CHART NO. 8 
DOOR PHONE FAULTS I . 
.*- 
here from the Go to Page 4 
to classify 
fault. 
YES 
Verify station 
cables. 
Call the Service 
Center for 
assistance. 
e3 END  

FAULT FINDING 
SECTION 500-036-500 
_ JANUARY 1988 
CHART NO. 8 
DOOR PHONE FAULTS 
(cont.) 
From - 
\Page 14) \Page 16) 
l - 
Program system 
for DP 
control unit output 
output. 
YES 
L 
YES 
Replace the 
Door Phone. 
Call the Service Replace the Door 
Center for ,NO 
Phone Control 
4 
assistance. Unit. 
i YES 
Tag defective Door 
Phone or Door Phone 
Control Unit and 
return for repair. 
I 
23 END 
-15  

I l3”l.I I~IImlJII~U 
SECTION 500-036-500 
JANUARY 1988 
CHART NO. 8 
DOOR PHONE FAULTS (cont.1 
work in any other 
1 NO j YES 
YES 
1 NO 
system programmed 
properly for the YES 
Program system 
for Door 
Phone usage. 
-16-