Toshiba Perception 1 2 User Manual

							2. Press the 1 button to access 
alpha characters. 
3. Press the 0 button to move the 
cursor (-) to the desired 
position. 
4. Press the button 
corresponding to the letter 
which you want to enter. 
5. If you want to enter a number, 
press the 1 button to change 
to numeric characters. Press 
the fl button again to return to 
alpha characters. (Refer to the figure on the following page for an explanation of the 
dialpad buttons.) 
(The left edge of the display to program a new message, or two spaces 
to the right of the preprogrammed message to add information.) 
Use them button to shift from letter to letter on that button. For example: 
n If you press 1, a D will be displayed. By pressing 1, the D will change 
to E. By pressing 1 again, the E will change to F. Press 1 again and 
the F will change to D. 
n To enter spaces, press 0. 
Numbers are also entered on the dialpad. 
Each button has three letters that 
are used in messaging; the 1 button 
is used to shift between the letters 
0 button moves 
I, 
cursor to the right 
(also used to ----+J~lFJ 
access special fl~iT/ 
characters) 
l=FJ@jm 01 button alternates 
between alpha 
0 button moves the 
cursor to the left Pm 
q q w and numeric 
characters 
1 button is used to shift between 
the three letters on each alpha button 
(also used to access special characters) 
48 
46 
0 
51 
ii 52 ii 53 ij 54 
ii m button,.press the m 
button. 
49 
50 
51  
						

							FAULT FINDING 
SECTlDN200-255-500 
MARCH1991 
FAULT FINDING PROCEDURES  
						

							FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
PARAGRAPH 
1. 
2. 
3. 
4. 
5. 
TABLE SUBJECT 
PAGE 
A 
B 
C FLOWCHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
1 
ELECTRONIC TELEPHONE CABLE CONTINUITY READINGS 
USING A VOLTMETER 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 
ELECTRONIC TELEPHONE CABLE CONTINUITY READINGS 
USING AN OHMMETER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 
PERCEPTIONeh, 
FAULT FINDING 
TABLE OF CONTENTS 
SUBJECT 
PAGE 
GENERAL ......................................................................................................... 1 
FAULT CLASSIFICATION.. ............................................................................... 1 
FAULT CLEARING PROCEDURES ................................................................. 1 
DEFECTIVE APPARATUS RETURNS ............................................................. 2 
FAULT IDENTIFICATION AND ELIMINATION PROCEDURES.. 
..................... 2 
FLOWCHARTS 
CHART NO. I-FAULT CLASSIFICATION .................................................. 4 
CHART NO. 2-LOADING 
FAULTS ............................................................. 
9 
CHART NO. 3-POWER FAULTS.. .............................................................. 12 
CHART NO. b--RINGING POWER FAULTS ............................................... 14 
CHART NO. 5-TIME SWITCH CLOCK FAULTS ........................................ 15 
CHART NO. 6-NPRU FAULTS ................................................................... 16 
CHART NO. 7-NRCU FAULTS ................................................................... 17 
CHART NO. 8-NCOU/NEMU/NLSU FAULTS.. ........................................... 
18 
CHART NO. 9-NEKU/NDKU/NSTU/NDSU FAULTS .................................. 19 
CHART NO. lO--SMDR, TTY, OR MODEM FAULTS.. 
................................ 20 
CHART NO. 1 l-VOICE COMMUNICATION STATION FAULTS ............... 22 
CHART NO. 12-lNIT/LOAD KEY FAULTS.. ................................................ 23 
CHART NO. 13-MAJOR ALARM FAULTS (MAJ LED ON) ........................ 24 
CHART NO. 14-CO/DIDTTIE TRUNK FAULTS 
........................................... 25 
CHART NO. 15-ATTENDANT CONSOLE FAULTS ................................... 26 
CHART NO. 16-COMMON STATION FEATURE FAULTS ........................ 27 
CHART NO. 17-SPEECH PATH OR DIAL TONE FAULTS.. ...................... 31 
CHART NO. 18-DATA/SPEECH PATH OR DIAL TONE FAULTS ............. 34 
CHART NO. 19-DIALING FAULTS ............................................................. 36 
CHART NO. 20-RINGING/RINGBACK TONE FAULTS ............................. 38 
CHART NO. Zl-MISCELLANEOUS FAULTS.. ........................................... 40 
CHART NO. 22-NMDU/NDCU FAULTS 
..................................................... 41 
CHART NO. 23-DATA COMMUNICATION STATION FAULTS ................. 43 
CHART NO. 24-DATA COMMUNICATION TRUNK FAULTS .................... 45 
TABLE LIST  
						

							FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
FIGURE LIST 
FIGURE TITLE 
PAGE 
1 
2 
3 FLOWCHART SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..~. 
PERCEPTION, POWER SUPPLY VOLTAGE CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5: 
PERCEPTION, POWER SUPPLY VOLTAGE CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 
.~.. . 
,. 
-ii-  
						

							FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
1. GENERAL 
1.01 
This section describes the maintenance 
procedures that are used for the diagnosis of faults 
in the PERCEPTlONe and PERCEPTIONex Dig- 
ital Hybrid/ PBX systems. To eliminate system 
faults, faults must first be classified and then cleared 
by replacing the defective apparatus. Operational 
tests can then be performed to verify correct appa- 
ratus operation. To perform operational tests, fol- 
low the fault-clearing flowcharts and the steps 
noted in section 5. 
2. FAULT CLASSIFICATION 
2.01 
To ensure that fault clearing is pursued in a 
logical sequence, a Fault Classification Flowchart 
is provided in Chart No. 1. 
2.02 Each Fault Finding flowchart denotes the 
steps necessary to clear specific types of faults 
(power faults, specific PCB faults, etc.). Most of the 
provided flowcharts are based on an assumption 
that the system fault was discovered and reported 
by a station user. Therefore, all faults are classified 
according to the way they would appear at an 
electronic telephone, standard telephone, DDIU, 
data terminal/computer, DSS console, attendant 
console, or equipment cabinet. 
2.03 Faults and their associated flowcharts are 
organized into the following categories: 
TABLE A-FLOWCHARTS 
Flowchart Title 
1 
Fault Classification 
2 
Loading Faults 
3 Power Faults 
4 Ringing Power Faults 
5 Time Switch Clock Faults 
6 NPRU Faults 
7 
NRCU Faults 
8 NCOWNEMWNLSU Faults 
9 NEKU/NDKU/NSTU/NDSU Faults 
10 SMDR, TTY, or MODEM Faults 
11 
Voice Communication Station Faults 
12 lNlT/LOAD Key Faults 
13 MAJOR ALARM Faults 
14 CO/DID/TIE Faults 
15 Attendant Console Faults 
16 Common Station Feature Faults 
I TABLE A-FLOWCHARTS (continued) 
Flowchart 
17 
18 
19 
20 
21 
22 
23 
24 Title 
Speech Path or Dial Tone Faults 
Data/Speech Path or Dial Tone Fault: 
Dialing Faults 
Ringing/Ringback Tone Faults 
Miscellaneous Faults 
NMDU/NDCU Faults 
Data Communication Station Faults 
Data Communication Trunk Faults 
3. FAULT CLEARING PROCEDURES 
3.01 Before attempting to clear any fault, ensure 
that the fault exists in the system and is not being 
caused by any associated external equipment, 
such as wiring, a Music-on-Hold source, etc. 
IMPORTA NT! 
Many PERCEPTION,,, features are as- 
signed, enabled, or disabled by using 
software entries described in the Pro- 
gramming Procedures manual. Before 
troubleshooting system hardware, it is im- 
portant to veriv that system programming 
is correct and functional. 
3.02 Faults occurring in PERCEPTION,,,, sys- 
tems are cleared by replacing PCBs, electronic 
telephones, standard telephones, DIUs, attendant 
consoles, or power supply(ies), according to in- 
structions in the provided flowcharts. 
3.03 Five different symbols are used in the flow- 
charts. Each is identified in Figure 1. 
3.04 The flowcharts are arranged sequentially to 
permit rapid fault localization within the system. All 
fault clearing must begin with the Fault Classifica- 
tion Flowchart (Flowchart I), which denotes the 
correct sequence to be followed in fault localiza- 
tion. 
3.05 If more than one station has a fault classified 
as a station fault (see flowcharts), then only one 
station can be corrected at a time. 
3.06 An alarm or fault indicator is used as an aid in 
locating a particular fault. However, if a fault occurs 
and its corresponding indicator does not function, 
-l-  
						

							FAULTFINDING 
SECTIONZOO-255-500 
MARCH1991 
Start and end of a flow- 
chart sequence 
Important notes affecting 
the fault clearing procedure 
.-----i 
Question to be answered 
YES or NO. 
0 
Progression TO or FROM 
another flowchart. Page 
numbers indicate the loca- 
tion of the flowchart within 
this manual. Lettersdenote 
0, 
the exact entrance or exit 
point in the flowchart. 
Statement of a required 
action 
-.A..-- A -. -...a..m-- -.-mm--. I 
the affected PCB should be replaced. Alarm and 
fault indicators that have failed cannot be cor- 
rected. 
3.07 The following precautions must be observed 
when handling PCBs: 
DO NOT: 
l Drop a PCB. 
l Stack one PC8 on top of another. 
l Handle a PCB without discharging any static 
electricity from your person by touching a metal 
part of the grounded system cabinet. 
l Touch PCB contacts with your fingers. 
IMPORTANT! 
If the fault is not cleared by substituting a 
PCB, the original PCB must be reinstalled 
in the system cabinet before proceeding to 
the next flowchart. 
4. DEFECTIVE APPARATUS RETURNS 
4.01 To return a defective system apparatus for 
repair, the apparatus must be prepared for ship- ping by enclosing the item in a suitable container J- 
(preferably its original box). The following guide- $,,-, 
lines must be followed: 
a) All PCBs must be enclosed in anti-static con- 
tainers. 
b) All electronic telephones, DIUs, attendant con- 
soles, etc. must be enclosed in plastic bags 
before being inserted into their shipping con- 
tainers. yy’. 
4.02 NEVER WRITE ON THE APPARATUS IT- .I- 
SELF! Instead, describe the nature of the defect on 
a Toshiba return (TSD RA) tag, and attach the tag ’ 
to the front of the defective unit with string (not d 
wire). This will allow the tag to remain attached 
during the testing and repair process. 
4.03 If diff erent and/or additional faults are created 
in the system by substituting a PCB, tag and return 
the substitute PCB as a defective unit. 
5. FAULT IDENTIFICATION and ELIMINATION 
/h-- 
PROCEDURES {j s 
‘*\.- ., 
5.01 
In the provided flowcharts, single line tele- 
phones are referred to in different ways. These are 
defined as follows: 
l 2500-type-Refers to a DTMF standard tele- 
phone with a “touch-tone” dialpad. 
l ST-T-Refers to both DTMF and rotary dial tele- 
phones. 
l 500-type-Refers to a standard rotary dial tele- 
phone. 
5.02 Checkelectronic/digital telephone cable con- 
tinuity by using a voltmeter, as follows: 
1) Check all station cables at the modular block 
and check all cables from NEKUINDKU PCBs to 
the MDF, at the MDF. 
2) Disconnect the electronic telephone. 
3) Using a DC voltmeter, measure between the 
two pairs to verify the presence of the readings , 
shown in Table 6. 
-2-  
						

							TABLEB-ELECTRONICTELEPHONE 
CABLECONTINUITYREADINGS 
(Using a voltmeter) 
*Nominal voltage- within the power supply 
limits of 23.2 w 28.2 VDC, while under AC 
power. 
3) An improper reading indicates an open, crossed, 
or shorted wire. 
4) Forthe MDF-to-electronic/digital telephone/DSS 
console cable, a more precise check can be 
made by using an ohmmeter (See 5.03). 
5.03 Check electronic/digital telephone and DSS 
console cable continuity by using an ohmmeter, as 
follows: 
1) 
2) 
3) 
4) 
Disconnect the electronic/digital telephone or 
DSS console. 
At the MDF, remove the bridging clips. 
Using an ohmmeter, measure the resistance 
between all combinations of the four wires at the 
modular block. All measurements should ex- 
ceed 
1 MOhm. 
At the modular block, measure the resistance 
between all wire combinations. The proper 
readings are shown in Table C. 
NOTES: 
1. The green-red and black-yellow measure- 
ments should be within 10% of each other. 
2. The maximum reading is 55 ohms. 
5.04 Check single line telephone (XT) cable con- 
tinuity as follows: FAULTFINDING 
s~cTloN 200-255-500 
MARCH1991 
TABLEC-ELECTRONICTELEPHONE 
CABLECONTINUITY READINGS 
(Usinn an ohmmeter) 
Pair 
I FROM TO VOLTAGE* 
Wire Color Pair Wire Color 
T Green 2 T Black 1 MOhm 
R Red 2 T Black 1 MOhm 
T Green 2 R Yellow 
1 MOhm 
R Red 2 R Yellow 1 MOhm 
T Green 1 R Red 5 55 Ohms* 
T Black 2 R Yellow I 55 Ohms* 
Check all DDIWPDIU cables at the modular 
block, and check all cables from NSTU PCBs to 
the MDF, at the MDF. 
2) 
3) 
4) 
5) 
6) 
Disconnect the STT at the wall. 
At the MDF, remove the bridging clips. 
Using an ohmmeter, measure the resistance 
between the two wires at the modular block. All 
measurements should exceed 1 MOhm. 
At the MDF, place shorting jumper wires be- 
tween the two wires (T and R). 
At the modular block, measure the resistance 
between T and Ft. Verify the maximum of 300 
ohms. 
5.05 Check DDWPDIU cablecontinuityasfollows: 
1) 
2) 
3) 
4) 
5) 
Check all DDIWPDIU cables at the modular 
block, and check all cables from NDCUINMDUI 
NDKU PCB to the MDF, at the MDF. 
At the MDF, remove the bridging clips. 
Using an ohmmeter, measure the resistance 
between the two wires at the modular block. All 
measurements should exceed 1 MOhm . 
At the MDF, place shorting jumper wires be- 
tween the two wires (T and R). 
At the modular block, measure the resistance 
between T and R. Verify the maximum of 300 
ohms. 
-3-  
						

							FAULTFINDING 
SECTlON200-255-500 
MARCH1991 
CHART NO. 1 
FAULT CLASSIFICATION 
xi ---------------------- pijfjy 
J 
To 
/ 
‘i 
START 
I NO 
Switch the main circuit 
breaker (power) 
to ON. 
- Wait approx. 30 
seconds for the 
system to load. 
YES 
__-___ 
---_ 
YES I- 
NOTE: See Section 
200-255-200, 
Installation, 
Chapter 4 
Paragraphs 7.01& 7.02 
(System Power Up). 
-4-  
						

							FAULT FINDING 
SECRDN 200-255-500 
MARCH 1991 
CHART NO. 1 
FAULT CLASSIFICATION (continued) 
date on attendant 
console or with 
the DTRF Program 
NOTE: It station’s 
voice comm. (including 
all related features) - 
is free of faults, the 
answer is YES. system functional 
-5-  
						

							FAULT FINDING 
SECTION 200-255-500 
MARCH 1991 
CHART NO. 1 
FAULT CLASSIFICATION (continued) 
From 
FC3 
Page 5 
2 Press the INIT 
key on the NPRU 
momentarily. 
‘Wait a few 
seconds for 
initialize to 
complete. 
Press the LOAD 
key on the NPRU 
momentarily. 
* Wait approx. 30 
seconds for re-load 
to complete. 
I I 
I 
A To- 
 
1 YES 
NOTE: See Section 
200-255-200, 
/nsra//ation, --- 
Chapter 4, 
Paraaraphs 7.01 and 7.02 
’ FC4 
Paoe 7 
-6-