Inter-Tel 824 Installation And Field Maintenance Manual

							INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION & MAINTENANCE Issue 1, June 1984 
Power Failure Transfer Alarm  
.? 
./ 
5.04 A warning bell or light may be connected to the power sup- 
ply to notify the user of a power drop. This requires a separate 
power source for the bell or light. 
Refer to Figure 3-7 on page 
3-17. 
Voltage Surge Protection 
5.05 AC voltage surges may make the system malfunction, cause 
misregistration, false logic, and damage to the electronic compo- 
nents. To prevent surges, 
Inter-Tel recommmends the use of an AC 
line conditioner 
or surge protector. Follow these specifications 
to select surge protection. The device must: 
A. Clip fast voltage transients at 300VDC nominal in 5 nano- 
seconds or less. 
B. Sustain the input voltage level when the AC source drops 
below 97VAC. 
C. Prevent extraneous signals carried into the equipment on 
the AC input, even though the AC outlet has a separately 
fused dedicated circuit. 
c. PRINTED CIRCUIT BOARD (PCB) INSTALLATION 
*****************t*************************** 
* 
CAUTION * 
* Do not insert or remove PCBs with the * 
* power on. The PCBs will be damaged. * 
**t****************************************** 
Main Distribution Frame Unit (MDF) PCB 
5.06 The MDF PCB is shipped installed in the KSU. 
If it is 
necessary to replace it, 
remove the two screws at the top and 
bottom of the PCB and slide it out of the KSU. 
Insert the new 
PCB with the amphenols facing left and tighten the screws. 
Refer 
to Figure 3-9 on the next page. 
-,’ 
. 
Page 3-20  
						

							INTER-TEL PRACTICES 
INSTALLATION 
824 INSTALLATION & MAINTENANCE 
Issue 1, 
June 1984 
FIGURE 3-9. 
MAIN DISTRIBUTION FRAME (MDF) PCB 
EXTERNAL FEATURE 
A 3 RS232C INTERFACE: 
n 5 MOH PHONE JACK 
INTERFACE 
LINE SEPARATION CENTRAL OFFICE 
LINE INTERFACE n 6 KEYSiT INTERFACE 
SWITCHES EXT. I- 12 
n 7 
KEYSET INTERFACE ’ 
EXT. 13-24 
Page 3-21  
						

							INTER-TEL PRACTICES 
INSTALLATION 
824 INSTALLATION & MAINTENANCE 
Issue 1, 
June 1984 
Central Processor Unit (CPU) PCB 
5.07 Install the CPU PCB as described below. 
For a photograph, 
refer to Figure 3-10 on the next page. 
(1) Place the Battery Jumper in the position to enable data 
base protection. The jumper must be set from the center 
pin to the pin marked 1. 
(2) Verify that the ON/OFF switch on the power supply is in 
the OFF position. 
(3) Install the CPU PCB with components facing left in the 
cardfile slot labeled CPU. 
(4) Turn the ON/OFF switch ON. 
(5) Obtain a reading of S.OVDC +O.lV on the cardfile. If the 
voltmeter does not read 5Vl%, 
remove AC power to the KSU 
and take out the PCB. 
After the PCB is removed, repeat 
the check for shorted components. 
If the voltage is 
still not within tolerance, 
refer to the TROUBLESHOOTING 
section. If the voltage is within tolerance with the PCB 
installed, 
proceed to the next step. 
(6) Observe the Light-Emitting Diodes 
(LEDS) on the front 
edge of the CPU PCB for the following indications: 
a. The top LED blinks approximately once a second. 
b. 
The second LED (counting down) is off. i 
C. The third LED is almost constantly on, with a slight 
flicker. 
d. 
The bottom-most LED is constantly on. 
(7) If the LED indications are not as stated above, 
Do NOT 
PROCEED. 
Turn off the system power, wait approximately 
15 seconds, 
and repeat Steps 3 through 6 above. 
If the 
LEDs still do not function as described, 
Do NOT PROCEED. 
Refer to the TROUBLESHOOTING section. 
: 
(8) Turn off the power to the KSU. 
;’ 
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							INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION b MAINTENANCE Issue 1, June 1984 
I’ 
FIGURE 3-10. CENTRAL PROCESSOR UNIT (CPU) ECB 
c 
-ED INC 
CLOCK 
WATCHI 
CLOCK 
CLOCK IICATORS 
STATUS 
IOG TIMER 
STATUS 
STATUS 
n I 
DATA WRITE ENABLE/ 
n 4 PROGRAMMING DATA SELECT 
DISABLE SWITCH SWITCHES (6 PL) 
n 2 SYSTEM MODE DATASET/ 
OPERATE SWITCH n 5 BATTERY JUMPER 
n 3 PROGRAMMING INDICATORS 
n 6 RON STORAGE (6 PL) 
(7 PL) 
Paae 
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							INTER-TEL PRACTICES 
INSTALLATION 
824 IlYSTALLATION & MAINTENAESCE Issue 1, June 1984 
Central Office Interface (COI) PCB 
5.08 Two different versions of the CO1 PCB are available. 
One 
has circuitry for two C.O. lines: one has circuitry for four. 
Refer to Figures 3-11, 
3-12 and 3-13 on the following pages. 
5.09 Each circuit may be configured for DTMF or Dial Pulse 
signalling. 
however, DTMF and Dial Pulse signalling may be mixed; 
be aware that not all Central Offices are equipped to 
accept DTMF signalling. 
5.10 Two CO1 PCBs may be installed. 
If only one is used, a 
CO1 Jumper PCB must be inserted in the second slot. 
This PCB is 
shipped with the KSU. 
(1) Each circuit in locations UllA and B (or UllA through D) 
may be either DTMF (chip number 4089) or Dial Pulse (chip 
number 400994). 
If DTMF, 
the switch next to each chip 
must be set to PB. If Dial Pulse, set the switch to DP. 
(2) With the system power off, 
install a CO1 PCB in the first 
available slot labeled 2/4COI 
ing left. with the components fac- 
(3) Turn power on. 
The LEDs on the front of the PCB (two or 
four depending on the number of circuits on the PCB) will 
flash once and go out. 
After five seconds, the LEDs on 
the CPU PCB will light. 
If the LED indications are not 
as stated, 
refer to the TROUBLESHOOTING section. 
(4) Obtain a reading of 5.OVDC +O.lV on the cardfile as 
described for the CPU PCB. 
Ensure tolerance. 
(5) Turn off the power to the KSU. 
(6) Repeat this procedure for the next CO1 PCB. 
OR, (7) Insert the CO1 Jumper PCB in the second 2/4 COI slot 
with the solder side facing right. 
(8) Obtain a reading 
of 5.OVDC +O.lV on the cardfile as 
described for the CPU PCB. 
Ensure tolerance. 
(9) If the reading is not within specifications, the PCB may 
not be seated properly. 
Reinsert it and take another 
reading. 
(10) Turn off the power. 
NOTE: Each circuit has a 3dB C.O. line attenuation pad 
to reduce the incoming signal on extremely hot lines. 
:: 
. 
Page 3-24  
						

							INTER-TEL PRACTICES 
824 INSTAIJATION & MAINTENANCE INSTALLATION 
Issue 1, June 1984 
FIGURE 3-11. 4-COI CENTRAL OFFICE INTERFACE PCB 
 
DTMF/ DIALPULSE 
SELECT SWITCH CKT’S l-4 
LEFT TO RIGHT, RESP. 
: LED INDICATOR!. 
CIRCUIT I 
CIRCUIT 
2 CIRCUIT 3 
CIRCUIT 4 
3dB C.O. LINE 
PAD- CIRCUIT 
* 3dB C.O. LINE 
PAD- CIRCUIT 
- 3dB C.O. LINE 
PAD- CIRCUIT 
- 3dB CaO. LINE 
PAD- CIRCUIT 
DTMF/DlAL PULSE 
GENERATOR I.C. CKT’S l-4 
LEFT TO RIGHT, RESP. Al-l-ENUATION 
2 
ATTENUATION 
3 
ATTENUATION 
4 
Page 3-25  
						

							INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION & MAINTENANCE Issue 1, June 1984 
. 
“5 
+i 
FIGURE 3-15. 2-CO1 CENTRAL OFFICE INTERFACE PCB 
						

							INTER-TEL PRACTICES 
INSTALLATION 
824 INSTALLATION 6r MAINTENANCE 
Issue 1, June 1984 
FIGURE 3-13. 
CO1 JUMPER PCB 
,. 
I. 
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Paqe 3-27  
						

							INTER-TEL PRACTICES INSTALLATION 
824 INSTALIATION & MAINTENANCE Issue 1, 
June 1984 
Key Telephone Interface (KTI) PCB 
5-11 Two different KTI PCBs are available. 
One has circuitry 
for four keysets; one has circuitry for eight. There may be a 
maximum of three KTI PCBs in the system. 
Refer to Figures 3-14 
and 3-15 on the following pages. 
(1) With th e system power off, 
install a KTI PCB in the first 
available slot marked 
4/8KTI with components facing 
left. 
(2) Turn power on. 
All four or eight LEDs (depending on the 
number of circuits on the PCB) will flash once and go 
out. The LEDs on the CPU PCB will light. 
If the LED 
indications are not as stated, refer to the TROUBLE- 
SHOOTING section. 
(3) Obtain a reading of 5.0VDC +O.lV on the cardfile as 
described for the CPU PCB. Ensure tolerance. 
(4) Turn off the power to the KSU. 
(5) Repeat this procedure for each additional KTI PCB. 
Page 3-28  
						

							INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION & MAINTENANCE Issue 1, June 1984 
FIGURE 3-14. 8-KTI KEY TELEPHONE INTERFACE PCB 
A STATION SPEECH PATH FUSE 
t.3 AMP) STATION POWER FUSE 
(1.0 AM PI ED INDIC 
CIRCUIT 
CIRCUIT 
CIRCUIT 
CIRCUIT 
CIRCUIT 
CIRCUIT 
‘CIRCUIT 
,CIRCUIT :A7 -0RS 
Page 3-29