Inter-Tel 824 Installation And Field Maintenance Manual
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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. ;’ Page 3-22
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 3-33
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. . 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