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1、Troubleshooting KI-1586A Telecenter IV Troubleshooting RAULAND-BORG CORPORATION ? 3450 West Oakton Street, Skokie, Illinois 60076-2951 ? (708) 679-0900 Table of Contents DISPLAY PHONE DIAGNOSTICS #73 Hardware I/O Diagnostics.2 General Procedures.2 System Halting and Voltage Measurements.6 Line Type
2、Tests C.O. and PBX Trunks. 7 Speakers. 8 PhoneLines.9 Call-In Switches.10 #74 4Call-in Sensitivity (RP2) Adjustment.11 #75 LLM Line Link Tests.12 COMPUTER AIDED DIAGNOSTICS Computer Monitor Set-up. 13 Serial Port Monitor Commands.14 Other Serial Port Output.15 TROUBLESHOOTING AND REPAIR TCN Find-It
3、Fix-It Procedures Time Saving Hints and Suggestions.16 System Wont Run or Locks-up.16 System WillNot Program.16 Phone Wont Ring. 17 Time Tones Do Not Work.17 All-Page Problem.17 Phone Rings-back Upon Hanging-up. 18 System Misdials or Wont Allow Access(Intermittent) . 18 Talk Path Noisy or Dead (Inte
4、rmittent).18 Crosstalk On Lines.18 Phone Rings When Call Should Go To Attendant.1. 19 False Call-ins After All-Call or Time Tone.19 Supplementary Procedures Finding Duplicate Numbers. 20 Phone Line TAP Functions (Transfer Capability and Cradle Switch Tests). 20 Ground Resistance Measurement.2 1 Loss
5、 Measurement.21 Lockout (Line, Link, or Receiver). 22 Statistics.23 Loop Sense Measurement. 24 LineRebalancing Procedure. 25 Console Interface Adapter(TC4420) . 27 LCD Display Problems(General). 27 Single Link Staff Phone Problems(General) . 28 Speaker Intercom Problems (General). 28 Interconnect Pr
6、oblems (General). 29 QUICK REFERENCE CHART. 30 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89) Page 1 of 30 RadioFans.CN 收音机爱 好者资料库 Troubleshooting DISPLAY PHONE DIAGNOSTICS #73 Hardware I/O Diagnostic Summary: This is the primary diagnostic of the TC4 system. The #73 I/O Diagnostic is a powe
7、rful method for exercising all of the features and functions of any physical number in the system from one point, using a display phone. It provides direct access to TCIV hardware thru the flat cable buses by reference to physical numbers, link numbers, and desired actions (relay on, phone line conn
8、ect, etc.). It can be used to verify physical number associations with hardware and physical number addressing. Keep the following in mind when using the #73 I/O Diagnostic. Special characteristics enable dealing with in-use lines and when troubleshooting in interconnect situations. It bypasses all
9、attributes, location codes and other software details. A system halt feature permits direct measurements of d.c. voltages on flat cables which control expansion modules. Individual LLM lines and relays can be tested. Caution: Perform the #73 diagnostic when the system is not busy: It will tie up a D
10、TMF receiver and may interfere with other system functions, or vice v e r s a It can also leave the system in a state unknown to the processor (e.g., by leaving a speaker relay on or leaving a phone connected to a link). To avoid this problem, reset the system after performing this diagnostic. GENER
11、AL PROCEDURES Step 1. Dial #73 on a display phone. The display will ask for a Physical Number. When the number is entered, the display phone will be connected via a link to a DTMF register. The display field will appear as follows. NNNN LL V HT AA NNNN = The Subject physical number. This value can b
12、e incremented or decremented using the telephone touch-key pad. The remaining displays fields provide a status report from the main program on the hardware associated with the displayed Subject physical number. Any commands entered through the touch pad will apply to the displayed Subject physical n
13、umber. A special null procedure can be invoked for the Subject physical number. The null procedure keeps the main program from interfering with tests on the associated hardware (e.g.: taking a phone off-hook or grounding a call switch will not produce dial tone or a call-in). The null procedure is n
14、ormally deleted when the number is changed or when you hang up. However, if the last keystroke before changing the Subject physical number or hanging-up was a connect or relay on command (key 1, 2, or 3), version 102 software allows the proce- dure to remain invoked. This allows conducting tests inv
15、olving several lines and/or permits hanging-up to release the receiver for traffic handling. Page 2 of 30 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. t/89) RadioFans.CN 收音机爱 好者资料库 Troubleshooting Always clear connections and procedures established by the diagnostic by resetting the system or is
16、suing the appropriate disconnect commands. LL = Link Number (00 to 15). Upon #73 initiation, this is the link used by the test phone and its receiver. They will remain in this link. If the displayed link number is changed, all future connect commands use the new link number. This allows connecting t
17、wo phones to a link which is not the test phone link and enables communication which is Inaudible to the test phone or its receiver. This display field also changes while checking in-use lines for audio and so forth. The link number of the in-use line will be displayed when the test phone is connect
18、ed to it, using the connect command key 1. The test phone link number will reappear upon return to the test link. v = =Activate VCM Intercom. This display indicates that there is a minimum speaker load across the VCMs terminals, making it active. The V field information was not available prior to ve
19、rsion 102 software. To see the V displayed, select an SC25 line with a speaker and send the relay on command (press key 2). Then, send the relay off command (press key 5) and the V will disappear. HT = Hook switch (H) and Call-in switch (T) status for the Subject line. This field will display some c
20、ombination of two characters from the following lists (e.g.: +R). H = Hook switch status character will be either +, -, or N: + =An off-hook is detected for the Subject line. -= An on-hook is detected for the Subject line. N=No LLM or no line hybrid is detected on for the subject line. T = Call-in S
21、witch status character will be either G, R, or N: G =A ground is detected on the SC25 T (call-In) terminal. R=A resistor ground is detected on the T terminal N=No connection is detected on the T terminal The HT display field status indicators represent external inputs to the TCIV. They do not indica
22、te whether the associated line is in use. In some cases service requests are ignored by the system (e.g.: NNNN 5 11) and in some cases service is provided without a service request (e.g. most in-use C.O. trunks will not show +). A two-digit hexadecimal figure will appear in the HT field in software
23、versions prior to version 102. A table for Interpreting these hexadecimal values is provided with the procedures for performing Line Type Tests. This information can be derived from Drawing KC1461. AA =Number of Active Lines in the system (0 - 64). The probability that using the diag- nostic will in
24、terfere with traffic increases directly with the number of lines in use. 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89) Page 3 of 30 Troubleshooting Step2. Refer to the following explanations of key functions and the keypad illustration on the following page and perform keystrokes as require
25、d. Function: 1 Connect the line associated with the Subject physical number (NNNN) to the LLM link (LL). If the subject line is on-hook, the LLM will send a single ring burst to the phone. 1 Connect the Test Phone and its receiver to the link being used by the display line. This will enable monitori
26、ng of ongoing voice and audio for test purposes. If a conversation is inter- rupted, announce testing and press 4 immediatly to return to the test link. 2 Turn on a speaker relay associated with the displayed physical number. If a speaker is at- tached, this will connect the VCM (intercom amplifier)
27、 to the speakers terminals on the SC25 and a V will appear in the display. To hear the VCM, connect the telephone end of the VCM to the same link as the talk/listen phone. Typically, the VCM is connected to line 2. 3 Connect the single link staff phone relay. This will connect the specified single l
28、ink staff phone to the LLM line which is shared by all single link staff phones. 4 If the LLM line is not in-use, it will be disconnected from a connection ma Rev. l/89) Troubleshooting Notes: 1. An on-hook LLM phone will ring each time a connect signal is sent to it. The ring burst is hardware cont
29、rolled by a logic hybrid and plug-in LLM line hybrid. 2. If you connect two LLM lines to the same link, they can communicate until one is dis- connected or the system is reset. 3. Sending a speaker connect signal will cause an audible click on the SC25 as the relay energizes. A V will appear in the
30、display if a speaker is connected to the designated circuit. Caution: If you disconnect or change links on either your own (the display phones) physical number or that of the line used for the DTMF register, use of the display phone for communication and testing will be terminated and the system wil
31、l have to be RESET. Test Tone A 941 Hz. test tone (5 seconds on and 5 seconds off) can be obtained for performing audio measurements or listening tests. The tone is available to the test phone or any phone in the link with it. Little display interaction is required, so any phone can be used which ha
32、s its B:78 attributes set to on. Tone levels are affected by the phones impedance, the test phone line hybrid, the number of phones in the test link, and component tolerance in the MI0 generator circuits. Typically, tone levels are as follows: .25 vrms, -10 dbm at the receiver connection to an LLM (
33、0 or 1) .10 vrms, -17 dbm across a phone line. Note: The telephone keys operate as a two by three matrix: Each vertical pair (e.g.: 1 and 4, 8 and 0, etc.,) addresses a common function (i.e.: LLM, Speaker Relay, etc.). The uppermost key makes a connection or increments a numerical value and the lowe
34、r key of a pair ends a connec- tion or decrements a numerical value. Line Link No. Decrement 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89) Page 5 of 30 Troubleshooting System Halting and Voltage Measurements (#73) Summary: Voltage reading on flat-cable buses can be performed using the #73 d
35、iagnostic or the diag- nostic disk program, which is simpler and does not require access to the MIO. Either method requires halting the system, during which time no calls can be made or features accessed. However, this test will not disturb calls in progress. These measurements are important trou- b
36、leshooting aids when the TCIV is operating intermittently or is unable to access certain physical numbers. Step 1. Step 2. Step 3. Step 4. Step 5. Dial #73 and enter the physical number of the line to be tested, then ground pin 66 of the A connector on the back of the MI0 (refer to Drawing KC1461).
37、This ground halts the system and produces a static condition on the flat-cable buses. Using a one-megohm (or higher) digital meter, measure the voltages on the flat-cable pins. For TC4150 LLMs, access may be gained at the end of the flat-cable. For TC4110 SC25s or TC4120 SCC25s, access may be gained
38、 by unplugging the flat-cable from any board not under test. For ease of testing, a flat cable connector (e.g.: 3M NO3399) can be crimped to the flat-cable to provide test access. Refer to the MI0 schematic (KC1461) to identify each pin/conductor number and verify the voltage reading obtained repres
39、ents the appropriate binary number. If Physical Line 7 were entered in the display, the binary number 7 (0000000111) may be verified by measuring 12 volts on LLM flat-cable conductors 18, 20, and 2 1 and 0 volts on conductors 12, 13, 14, 15, 16, 17, and 19. The least significant four bits, measured
40、on con- ductors 19, 20, 18, 21 (Pin 18 is at binary position 2), represent the LLM circuit number (0 to 15). The remaining bits represent the DIP switch setting of the LLM. For speakers, the flat cable is divided into two sections. Section one is a five-bit relay select number (0 to 24), respectively representing relays 1 through 25. Section two is a six-bit binary module select number which represents the DIP switch s
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