Inter-Tel Microprocessor Key Installation And Maintenance Practices Manual

							INTER-TEL PRACTICES TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 
NOTE: The following symptoms are isolated to one keyset only. For identical problems 
involving more than one keyset, refer to Section 3.02; D SYSTEM MALFUNCTIONS. 
SYMPTOM PROBABLE CAUSE 
CORRECTIVE ACTION 
Cannot place a 
call on hold a. User error 
a. Refer to Section 340-100-200 and ‘verify 
feature operation. 
b. 5.OV regulator out of 
b. Set 5.OV regulator as outlined in Section 
tolerance 
340-l 00-300. 
c. Defective keyset 
c. Replace keyset with a known good keyset. 
d. Defective CPU 
d. Contact INTER-TEL’s Field Service for 
assistance. 
Cannot put keyset into 
call forwarding a. User error 
a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Defective keyset 
b. Replace keyset with a known good keyset. 
c. Defective CPU 
c. Contact INTER-TEL’s Field Service for 
assistance. 
Cannot put keyset 
in do-not-disturb a. User error 
a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Switch-selectable 
option not enabled b. Enable the DIP switch setting as outlined 
in Section 340-100-300. 
c. Defective keyset 
c. Replace the keyset with a known good 
keyset. 
d. Defective CPU 
c. Contact INTER-TEL’s Field Service for 
assistance. 
Figure 6-1. Feature Failure Troubleshooting Chart 
Page 6-3 
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							TROUBLESHOOTING 
SECTION 340-100-600 
ksue 3, April 1963 INTER-TEL PRACTICES 
-. 
Figure 6-1. Conf/mmf / 
SYMPTOM PROBABLE CAUSE 
CORRECTIVE ACTION 
Last number redial 
inoperative a. User error 
a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Improper usage 
b. The redial function cannot be used for 
redialing numbers stored in the keyset’s 
memory. 
c. Defective keyset 
c. Replace the keyset with a known good 
keyset 
Redial busy number 
inoperative a. User error 
a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Defective keyset 
c. Replace the keyset with a known good 
keyset. 
Keyset stored number a. User error 
memory lost or inoperative 
b. A line key was not 
accessed prior to 
activating one of 
the stored number 
memory locations. 
c. Power to keyset was 
removed. 
d. Defective keyset a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Reprogram the memory storage location and 
ensure that the line key is accessed prior to 
using the stored number. 
c. Verify that the keyset has power and then re- 
program the numbers.. 
d. Replace the keyset with a known good 
keyset. 
Cannot activate another a. User error 
a. Refer to Section 340-100-200 and verify 
keyset’s message waiting feature operation. 
lamp 
b. Defective keyset 
b. Replace the keysetwith a known good keyset. 
(Check the called party’s keyset to ensure it 
is operating properly.) 
c. Defective CPU 
c. Contact INTER-TEL’s Field Service for 
assistance. 
Full-duplex 
speakerphone 
inoperative a. Defective speaker 
or speaker cable a. Check the speaker cable with an ohmeter. If 
the speaker is still inoperative, replace the 
speaker. 
b. Switch-selectable 
option not enabled b. Enable DIP switch 5 inside the phone. Refer 
to Sectidn 340-100-300. 
c. Defective keyset 
c. Replace the keyset with a known good 1 
keyset. 
Page 6-4  
						

							INTER-TEL PRACTICES 
TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 
Figure 6-1. Confinued 
SYMPTOM 
Cannot transfer 
outside calls to 
other keysets PROBABLE CAUSE 
a. User error 
b. Called station is in 
do-not-disturb CORRECTIVE ACTION 
a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Standard operating procedure. Any keyset 
in do-not-disturb cannot receive calls from 
a transferring station. 
c. Defective keyset 
c. Replace the keyset with a known good 
keyset. (Check the called party’s keyset to 
ensure it is operating properly.) 
d. Defective CPU 
d. Contact INTER-TEL’s Field Service for 
assistance. 
Cannot initiate a 
conference a. User error 
a. Refer to Section 340-100-200 and verify 
feature operation. 
b. System is not 
equipped for 
conferencing b. The system must have optional conference 
board. 
c. Defective keyset 
c. Replace the keyset with a known good key- 
set. (Check the C.O. line status to ensure 
that external parties are being put on a hold 
status which setting up the conference.) 
d. Defective 
conference PCB 
e. Defective CPU d. Replace conference PCB with a known 
good PCB. 
e. Contact INTER-TEL’s Field Service for 
assistance. 
Cannot initiate 
a paw a. User error 
a. Refer to Section 340-100-200 and verify 
feature. 
b. No paging zones 
in the program b. Verify that the stations are programmed for 
paging through the station feature program 
subroutine. 
c. Defective keyset 
c. Replace the keyset with a known good 
keyset. (If keyset cannot receive a page, 
ensure that the keyset is in the appropriate 
paging zone.) 
Page 6-5  
						

							\.-. 
TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 INTER-TEL PRACTICES 
-. 
.: 
/ 
Figure 6-1. Cod/wed 
SYMPTOM PROBABLE CAUSE 
CORRECTIVE ACTION 
Paging times out 
in less than 
12 seconds a. Usrr error 
b. STN PCB has 
undetermined 
extensions a. Refer to Section 340-100-200 and verify 
feature operation. 
b. Terminate the unused extensions. Refer to 
Section 340-100-300 for instruction. 
c. Defective CPU 
c. Contact INTER-TEL’s Field Service for 
assistance. 
NOTE: Speed transfer, digit I dial, night station ringing, do-not-disturb enable, full-duplex 
speakerphone, executiveprioritycail waiting, andoff-hook tonesareswitch-selectable features 
enabled for an individualphone. lfproper settings have been confirmed, replace the keyset 
with a known good keyset. 
Page 6-6  
						

							INTER-TEL PRACTICES TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 
-$. 
NOTE: The following symptoms are isolated to one keyset on/y. For identicalproblems involving 
more than one keyset, refer to Section 3.020 System Malfunction, and Figure 6-4. 
SYMPTOM 
No intercom 
dial tone PROBABLE CAUSE 
CORRECTIVE ACTION 
a. Defective cabling 
a. Verify correct cable connections. 
b. Defective keyset 
b. Replace the keyset with a known good 
keyset. 
Cannot place 
intercom calls c. Defective 
station board 
a. Defective keyset c. Determine which PCB corresponds to the 
affected station and replace. 
a. Replace keyset with a known good 
keyset. 
Data noise 
in keyset b. Defective 
station PCB 
a. Defective cabling 
or connections b. Determine which PCB corresponds to the 
affected station and replace. 
a. Check for loose or open connections, or 
crossed data wires. 
b. Defective keyset 
b. Replace keyset with a known good keyset. 
Keyset 
inoperative c. Defective 
station PCB 
a. Defective or 
misadjusted keyset c. Replace the corresponding STN PC6 with 
a known good PCB. 
a. Check the internal 5OVDC setting and 
adjust if necessary. Replace the set if still 
inoperative. 
b. Defective cabling 
b. Check for loose or open connections in 
corresponding cabling. 
c. Defective station 
c. Replace thecorresponding STN PCB with a 
known good PCB. 
Other station 
conversations can 
be heard on the 
station set a. Defective 
station PCB a. 
Replace the corresponding STN PCB with a 
known good PCB. 
b. Defective 
CPU PCB b. Contact INTER-TEL’s Field Service for 
assistance. 
Figure 6-2. Internal Communica!ions Troubleshooting Chart 
Page 6-7  
						

							TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 INTER-TEL PRACTICES 
NOTE: The following symptoms are isolated to one keyset only. For identical problems involving 
more than one keyset, refer to Section 3.020 System Malfunctions, and Figure 6-4. 
SYMPTOM - 
--__-- 
PROBABLE CAUSE 
CORRECTIVE ACTION 
Cannot obtain 
C.O. dial tone 
(intercom function.) a. CO. line(s) 
restricted a. Check the station option sheet and com- 
pare with the station programming for that 
keyset. 
b. Defective keyset 
b. Replace the keyset with a known good 
keyset. 
Cannot place an 
outside call. C-0. 
dial tone present 
(intercom functions) a. Keyset is 
toll restricted 
b. Speed transfer 
switch-selectable 
option is enabled 
in the keyset 
c. Defective keyset 
d. Defective CPU a. Check the station option sheet and com- 
pare with the station programming for that 
keyset. 
b. Standard operating procedure. Disable DIP 
switch in keyset if speed transfer is not 
desired. 
c. Replace the keyset with a known good 
keyset. 
d. Contact INTER-TEL’s Field Service for 
assistance. 
Outside calls a. Line key is pressed by a. Standard operating procedure. Pressing a 
being dropped during user after initial con- 
line key after the connectlon has been 
conversation or upon nection is established 
made will automatically drop the call in 
answering C.O. call progress and re-access that C.0..line. 
b. Loop current interrupt 
b. Incorporate system option 6 (1.2 second 
from Central Office 
held call loop release) into system pro- 
gramming. 
C. Insufficient loop 
c. Central Office must supply 20 mAmp loop 
current being supplied 
current minimum. 
by the Central Office 
d. Defective keyset 
d. Replace the keyset with a known good 
keyset. 
Figure 6-3. External Communications Troubleshooting Chart 
Page 6-8  
						

							INTER-TEL PRACTICES 
TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 
SYMPTOM PROBABLE CAUSE 
CORRECTIVE ACTION 
Ail keysets in the 
system will not 
operate. No LED 
indications when 
a line key is pressed a. Main power fuse 
open a. 
b. Open connection in 
cable between 
power supply and 
KSU motherboard b. 
c. Defective 
station board 
C. 
Examine the fuse and replace it if neces- 
sary. 
CAUTION: Do not exceed maximum rating 
of fuse. 
Remove power from the system. Use an 
ohmmeter to check the cable connector 
and replace or repair faulty cable. 
Remove all STN PCB’s from the KSU. 
Check the voltage on the terminal block of 
the power supply. If voltage returns to 
correct indication, replace the PCB’s one at 
a time until the defective PCB is isolated. If 
voltage is still incorrect, proceed with 
step d. 
d. Defective 
power supply d. Use a voltmeter and check the voltage at 
terminal block of the power supply. If the 
voltage is not 30V f GVDC, replace the 
power supply. 
A group of four keysets will a. Defective fuse on 
a. Remove the station board from the KSU and 
not operate. No LED indi- station board 
replace fuse. 
cations when a line key is 
pressed. All four sets are loc- b. Defective 
b. Replace the STN PCB with a known good 
ated on one station board station board 
STN PCB. 
c. Defective receptacle 
on KSU backplane c. Replace KSU cardfile. 
d. Defective CPU 
d. Contact INTER-TEL’s Field Service for 
assistance. 
C.O. line inoperative 
throughout system a. Defective C.O. line 
from Central Office a. Disconnect the C.O. line from the COU 
PCB. Use a test set to verify the C.O. 
connection. 
b. Defective COU PCB 
b. Replace the COU PCB with a known good 
PCB. 
c. Defective CPU 
c. Contact INTER-TEL’s Field Service for 
I 
assistance. 
Figure 6-4. System Malfunctions Troubleshooting Chart 
Page 6-9  
						

							TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 
Figure 6-4. Confinued INTER-TEL PRACTICES 
 
-1 
, 
SYMPTOM PROBABLE CAUSE 
CORRECTIVE ACTION 
The SMDR printer will not a. Baud rates of the 
a. Match the baud rates of the printer and the 
communicate with CPU terminal and the CPU 
CPU. Set the printer for 300 baud. 
are not the same 
b. Miswired or 
defective cable b. Repair or replace connecting cable. 
c. Defective power supply 
c. Check the -12VDC with a voltmeter on the 
terminals of the power supply. Also check 
the cable between the power supply and the 
KSU backplane. Contact INTER-TEL’s 
Field Service for assistance. 
d. Defective CPU 
d. Contact INTER-TEL’s Field Service for 
assistance. 
Repeated occurrence of a. The AC line is not ded- 
a. Have a dedicated AC line installed by a quali- 
dropped calls, misdialed icated 
fied electrician from the main power panel 
C.O. numbersand intercom with a third wire ground. Ensure tel.ephone 
numbers, and lost transferred power is on its own circuit breaker. 
calls 
b. Equipped but un- 
b. Locate any unused circuits on the main 
terminated data lines (no 
distribution block. Then ground the STN 
keyset connected at the 
board transmit pair of each unused circuit. 
end of the cable) on 
the STN PCB. 
C. +5VDC low c. Contact INTER-TEL’s Field Service for 
assistance 
d. KSU located near a 
d. Relocate the KSU to an isolated roorn a 
strong magnetic field. 
minimum of 20feet away from any magnetic 
(e.g., high voltage power 
field-producing equipment. 
transformers or 
copying machines) 
e. Defective CPU 
e. Contact INTER-TEL’s Field Service for 
assistance. 
Figure 6-4. System Malfunctions Troubleshooting Chart 
Page 6-10  
						

							INTER-TEL PRACTICES TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 
NOTE: See Figure 6-6 for the locations of the LED lamps. 
’ 
PRINTED 
CIRCUIT BOARD LAMP LOCATION 
DESCRIPTION 
STN A Power reset LED (normally OFF) 
1. Indicates PCB has been acknowledged and 
electrically reset by the CPU. 
2. Indicates that a power interrupt has oc- 
curred on that PCB. 
B through E Circuit LED’s (OFF when not in use) 
1. Indicates that the station associated with 
that circuit is in use. 
CPU A through C Data LED’s 
1. Indicates that the CPU is functioning. The 
rate of flash indicates the amount of acitiv- 
ity in the system. Refer to Section 
340-100-300 for proper flash rates. 
D NMI LED (normally OFF) 
1. Indicates that the watchdog timer has had 
an interrupt. 
cou A 
Power Reset LED (normally OFF) 
1. Indicates that the PCB has beenacknowl- 
edged and electrically reset by the CPU. 
2. Indicates that a power interrupt has oc- 
curred on that PCB. 
B and C 1. Loop current indicator. Will light when the 
associated C.O. line is accessed 
Figure 6-5. Light Emitting Diode Indications 
Page 6-11  
						

							TROUBLESHOOTING 
SECTION 340-100-600 
Issue 3, April 1983 INTER-TEL PRACTICES 
SYMPTOM 
Conference Figure 6-5. Continued 
PROBABLE CAUSE 
CORRECTIVE ACTION 
A Power Reset (normally OFF) 
1. Indicates that the PCB has been acknowl- 
edged and electrically reset by the CPU. 
2. Indicates that a power interrupt has oc- 
curred on that PCB. 
B through D Conference CKT 1 (normally OFF) 
1. Lights when circuit is activated. 
E through G Conference CKT 2 (normally OFF) 
1. Lights when the circuit is activated. 
Page 6-12