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2 Circuit Pack Replacement

297-1001-536 Standard 01.03 August 1996

General Troubleshooting Guidelines

The circuit packs used here are only examples. This troubleshooting
procedure is valid for any combination of circuit pack printouts.

Enter the command TEST ACT or TEST STDBY and the following printout
may appear:

DPP STANDBY/ACTIVE FAULT
ERROR DETECTED ON PROC (A or B)
CPU CARD

SLOT:A1 EQPEC=6M62

EPROM PCA /

SLOT:A2 EQPEC=6M63

MEM EXPN

SLOT:A3 EQPEC=6M64

Perform Procedure 1–1.

Summary of Contents for BCS35

Page 1: ...BCS35 and up Standard 01 03 August 1996 297 1001 536 Distributed Processing Peripheral Card Replacement Guide DPP DPP...

Page 2: ......

Page 3: ...ed in the United States of America Information is subject to change without notice Northern Telecom reserves the right to make changes in design or components as progress in engineering and manufactur...

Page 4: ...t 1996 ii Publication history August 1996 Standard release 01 03 for software release BCS36 and up This version includes changes to this Publication history page December 1993 Standard release 01 02 f...

Page 5: ...ntegrated circuits 3 1 EPROM IC precautions 3 2 Memory expansion circuit pack 4 1 General description 4 1 Replacing the Memory Expansion circuit pack 4 1 Error Control II and Error Control II Jumper c...

Page 6: ...al Description 14 1 Replacing the SCSI circuit pack 14 1 56K Crossover circuit pack 15 1 General Description 15 1 Replacing 56K Xovr circuit pack 15 1 Four channel communication circuit pack 16 1 Gene...

Page 7: ...uit pack NT6M84AA release 01 06 options 12 7 Figure 12 2 Power and alarm communications A16 circuit pack NT6M84AA release 07 and NT6M84BA options 12 10 Figure 13 1 Disk II crossover A15 and B15 circui...

Page 8: ...and NT6M70CF 10 4 Table 10 2 Data stream interface DSI circuit packs A12 and B12 options part number NT6M70AC 10 5 Table 10 3 Data stream interface DSI circuit packs A13 and B13 options part number N...

Page 9: ...edure 5 1 Error control II circuit pack replacement A5 5 3 Procedure 6 1 QSIO circuit pack replacement 6 3 Procedure 7 1 Replacing the 56K Interface circuit pack A5 7 3 Procedure 8 1 Disk Interface ci...

Page 10: ......

Page 11: ...the document is revised it also applies to offices with software releases greater than BCS35 How to identify the software in your office The Office Feature Record D190 lists your current BCS and its N...

Page 12: ...Processing Peripheral DPP Product Guide 297 1001 543 DPP Alarm Clearing and Performance Monitoring Guide 297 1001 536 DPP Card Replacement Guide 297 1001 331 DPP Administration Guide 297 1001 537 DPP...

Page 13: ...f Documents 297 1001 112 Modular Documentation System MDS 297 1001 128 AMA Bellcore Format 297 1001 310 Table Editor Reference Manual 297 1001 821 297 1001 820 DMS Menu Commands Reference covers DPP c...

Page 14: ...ducts they represent The following chart lists all NT and BNR trademarks in this document Trademark Product DMS Digital multiplex system telephone switching equipment DMS SuperNode telecommunications...

Page 15: ...removing the line group controller from service removes all its subtending peripheral modules from service All calls in progress are dropped DANGER Risk of electrocution The inverter contains high vo...

Page 16: ...s For commands and parameters enter the letters or numbers the variable represents In most instances the name for the variable clearly indicates what you must enter If it does not further explanations...

Page 17: ...em control to the standby processor away from the processor with the faulty circuit pack The DPP s response to failure depends on how the Error Map ERRMAP is set up Level 0 alarm failures do not cause...

Page 18: ...y examples This troubleshooting procedure is valid for any combination of circuit pack printouts Enter the command TEST ACT or TEST STDBY and the following printout may appear DPP STANDBY ACTIVE FAULT...

Page 19: ...er supply information 3 Test the processors with the TEST ACT and TEST STDBY commands If the tests pass place the DPP in the PRIME processor mode and let soak for 2 days 4 After the soak period retest...

Page 20: ...ng NT6M64xx in Step 6b NT6M63xx EPROM card slot 2 NT6M64xx DRAM card slot 3 6d If the test passes place the DPP in the PRIME processor mode and let it soak for 2 days 6 If trouble continues contact ne...

Page 21: ...the O P Mode Switch to the ONLY position 3 Turn the Mode Switch Turn to the right and release 4 Observe that the active processor unit ONLY status lamp lights Wait for the log message Processor force...

Page 22: ......

Page 23: ...is a Z80 compatible device responsible for data transfer to and from Random Access Memory RAM and the DSI circuit packs The Counter Timer Circuit CTC IC handles interrupts from various devices within...

Page 24: ...clock See Table 2 1 Output to the display must occur within 0 5 seconds for the display to remain valid This time frame is compatible with the 0 5 second status request time interval of the error con...

Page 25: ...part number and has the correct revision level Also make sure the suspected faulty CPU is in the standby processor Verify that any applicable firmware for the circuit packs is correct 4 Remove power f...

Page 26: ...ssor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch to the right Turn it 45 degrees to the right and release 11 At the maintenance terminal en...

Page 27: ...Replacement Guide BCS35 and up Figure 2 1 CPU with DMA A1 and B1 circuit pack NT6M62BA options Note Switch SW2 is a four position right angle dip switch at the edge of the CPU circuit pack JU1 JU4 JU...

Page 28: ...s are alarms only with no accompanying processor switch 9 3 Major Major Level 3 Processor switch occurs 8 2 Major Major Level 2 Processor switch occurs 7 1 Major Major Level 1 Processor switch occurs...

Page 29: ...ecoded along with processor signals WAIT HALT RESET BUSAK and CLK Independent Port off on Data must be written to I 06 9C 9F Hex This is included for future use Display codes must be modified by chang...

Page 30: ...dditional wait states Enable the addition of wait states up to 5 on the ABCD inputs of the counter chip Configured for 1 wait state in the copper tracings Jumper JU3 JU4 Out Connects the internal 8KHz...

Page 31: ...d Device type number Factory On site Function Setting Position setting Switch SW1 Momentary Pushbutton red Processor Reset CAUTION Do not press SW1 unless instructed to do so activation may cause bill...

Page 32: ......

Page 33: ...irmware routines EPROM Integrated Circuits ICs contain operational programming for some DPP system functions The EPROM s fixed memory is factory programmed with necessary control instructions After in...

Page 34: ...w is completely covered Work on a surface with a good electrical ground and do not wear clothes or footwear with a high degree of synthetic materials especially nylon To prevent IC damage control or e...

Page 35: ...OM away return it to NT 3 Remove the new EPROM IC from its packing material and place it on a smooth flat surface so the pins are facing down and the coded identification label can be read from the to...

Page 36: ...rocessor mode After replacement and testing on the standby side with the new firmware perform an ONLY to ONLY processor switch and change the firmware on the now standby side Note 2 If none of the ICs...

Page 37: ...Make sure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty pack is in the standby processor Verify tha...

Page 38: ...us Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch to the right Turn it 45 de...

Page 39: ...B2 see note circuit pack options Note This figure represents the following part numbers NT6M63BF BCS21 24 DPP systems NT6M63CF BCS21 24 DPP systems NT6M63CH DPP systems w o 56K polling NT6M63CJ DPP s...

Page 40: ...nd U6 1 2 1 2 1 2 1 2 1 2 1 2 Jumper P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 Type 2016 2732 2764 6264 P 9 P 11 P 13 P 15 P 17 P 19 2 3 1 2 1 2 1 2 P 10 P 12 P 14 P 16 P 18 P 20 1 2 1 2 1 2 2 3...

Page 41: ...Device type number Setting Factory On site Function Position setting Switch None Used Notes Note 1 See Figure 3 1 Note 2 There are no customer definable options on this circuit pack Use this data for...

Page 42: ...2 1 2 1 2 1 2 1 2 1 2 Jumper P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 Type 2016 2732 2764 6264 P 9 P 11 P 13 P 15 P 17 P 19 2 3 1 2 1 2 1 2 P 10 P 12 P 14 P 16 P 18 P 20 1 2 1 2 1 2 2 3 U7 U8 U...

Page 43: ...Replacement Guide BCS35 and up Table 3 2 EPROM circuit pack A2 and B2 options part number NT6M63CJ DPP w 56K polling Device type number Setting Factory On site Function Position setting Rotary Switch...

Page 44: ......

Page 45: ...tain its programmed state Each expanded memory circuit pack contains up to 256 Kbytes 262 144 bytes of DRAM On the system level DRAM provides storage of temporary data such as system calculations and...

Page 46: ...ded surface 3 Make sure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty DRAM is in the standby process...

Page 47: ...t the Switch and Status Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch to th...

Page 48: ...ly Card 2 64K only B card 1 in A3 In All others out Must be the same as the factory setting Strap None Used DIP Switch None Used Rotary Switch None Used Switch None Used Notes Note 1 See Figure 4 1 No...

Page 49: ...Memory expansion circuit pack 33 DPP Card Replacement Guide BCS35 and up Figure 4 1 Memory Expansion circuit pack A3 and B3 circuit pack NT6M64AA options B A C...

Page 50: ......

Page 51: ...alarms and the Processor A Select ASEL line directing which processor A or B currently controls the DPP This circuit pack contains no customer selectable option settings See Table 5 1 and Figure 5 1...

Page 52: ...een activated up position This toggle switch is activated during replacement of the Error Control II circuit pack slot 5 A chassis See Table 5 1 CAUTION Do not activate the toggle switch unless perfor...

Page 53: ...e chassis See Figure 5 1 2 Pull the front panels free of the chassis Put the panels in a safe place to avoid scratching and bending 3 Make sure the DPP is in B ONLY processor mode Make the A B select...

Page 54: ...switch on the power supply Wait for power up activity to end and the message S W Loaded to print 8 Return the toggle switch on the Error Control II Jumper circuit pack in B5 to the down LED off posit...

Page 55: ...alarm status shows active alarms troubleshoot all alarm conditions At the maintenance terminal enter TEST ACT cr TEST STDBY cr 12 Put the front panels back on the DPP Position them on the chassis and...

Page 56: ...e Switch and Status Panel A chassis are provided to accept the banana plug connection on the end of the grounding strap Step Description Notes 1 Make sure the DPP is in A ONLY processor mode Press A B...

Page 57: ...ontrol II Jumper circuit pack continued Step Notes Description 6 At the maintenance terminal enter RSERR ACT 00 cr then RSERR STDBY 00 cr To clear any alarms on the active and standby chassis Perform...

Page 58: ...site Jumper None Used Strap None Used DIP Switch None Used Rotary Switch None Used Switch None Used Notes Note 1 See Figure 5 1 Note 2 There are no customer definable options on this circuit pack Info...

Page 59: ...rol II circuit pack in A5 is on Error control functions transferred to this circuit pack Error control functions operate normally Used only during corrective maintenance on the Error Control II circui...

Page 60: ...44 Error Control II and Error Control II Jumper circuit packs 297 1001 536 Standard 01 03 August 1996 Figure 5 1 Error control II A5 circuit pack NT6M65AA options...

Page 61: ...er circuit packs 45 DPP Card Replacement Guide BCS35 and up Figure 5 2 Error control II jumper B5 circuit pack NTM609AB options Error control jumper board II NTM609 REL Note LED DS1 lights when toggle...

Page 62: ......

Page 63: ...istate octal buffer Another tristate octal buffer circuit buffers the ten control lines used by the processor The QSIO circuit pack reports internal faults to the active processor by generating signal...

Page 64: ...corresponding to the switch settings are not the same for all SIO baud switches Note Enter the baud rate set command BAUD to establish software control of the QSIO channel See 297 1001 543 DPP Alarm...

Page 65: ...e 3 Make sure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty QSIO is in the standby processor Verify...

Page 66: ...and Status Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch to the right Turn...

Page 67: ...RCB to RXCB Baud C to RXCA RCC to RXCA Baud D to RXCB RCD to RXCB DIP switches S2 and S3 are used to select synchronous or asynchronous mode for the four channels of the QSIO The baud rate selection a...

Page 68: ...hart shows conversion for asynchronous to synchronous baud rates and rotary switch position for the applicable selection Switch position Asynch rate Synch rate Switch position Asynch rate Synch rate 0...

Page 69: ...00 Asynchro nous channel 2400 baud Channel C baud rate select Odd num bers appear as dashes on the face of the rotary switch A 2400 baud Rotary Switch S6 0 1 2 3 4 5 6 7 50 75 1200 110 134 5 150 2400...

Page 70: ...1001 536 Standard 01 03 August 1996 Figure 6 1 QSIO A6 and B6 circuit pack NT6M60AA options Note This circuit pack does not support polling on digital data lines use for an analog network only S2 Jump...

Page 71: ...Printer Port ROVER or EAT Typically not used SW7 MMI Link SW5 MMI Link SW4 Polling Modem 0 2 4 6 8 A C E 0 2 4 6 8 A C E 0 2 4 6 8 A C E 0 2 4 6 8 A C E Table 6 2 QSIO circuit pack A6 and B6 options p...

Page 72: ...rnal Channel D transmit clock 1 2 Jumper J9 1 2 2 3 ASYNC SYNC Channel D receive clock 1 2 Jumper J10 In Out Select internal timing source DPP Select external timing source Modem Select internal or ex...

Page 73: ...ynchronous to synchronous baud rates and the rotary switch position for the applicable selection Switch position Asynch rate Synch rate Switch position Asynch rate Synch rate 0 50 800 8 1800 N A 1 75...

Page 74: ...10 134 5 150 2400 300 4800 600 9600 1200 8 9 A B C D E F 1800 2000 2400 3600 4800 7200 9600 192007 MMI Link Asynchronous chan nel 2400 baud Channel C baud rate select A 2400 baud Rotary Switch S5 0 1...

Page 75: ...SIO circuit pack The external transmit timing source is brought in from a source outside the DPP usually associated with a modem generated timing source from a digital data line Note 5 The MMI Link DP...

Page 76: ...6 Standard 01 03 August 1996 Figure 6 3 Quad SIO A6 and B6 circuit pack NT6M60BA options J12 J13 J2 J3 J10 J11 J5 J4 S2 S3 S4 S5 S6 S1 J9 J6 J8 J7 Note This circuit pack supports polling on digital da...

Page 77: ...in slots A1A1A6 and A1A2A6 S5 printer port ROVER or EAT S4 MMI link 2 S3 MMI link 1 S2 BX 25 polling link Note 1 S2 polling modem is inactive if 56K polling is used 2 This circuit pack supports pollin...

Page 78: ...analog network 2 Do not set these switches S6 1 S6 2 S6 3 and S6 4 to the On position Thisswitch and LED are not active in this configuration all S8 switch settings 1 through 4 must be off ON 1 2 3 4...

Page 79: ...and SIO baud rates A separate clock is used because the clock available on the circuit pack 12 MHz exceeds chip capability The 6MHz 12 MHz divided by two provided by the CPU is too slow for adequate...

Page 80: ...parity guard on entire static memory 50 pin access port for logic analyzer emulator and or test support factory use only RS 232 compatible port for local diagnostics The SCC has two channels of high...

Page 81: ...surface 3 Make sure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty 56K Interface pack is in the stand...

Page 82: ...Switch and Status Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch to the rig...

Page 83: ...e watch dog timer Watch Dog enable Out Jumper P8 Out disable CPU clock In enable CPU clock CPU clock enable In Jumper P9 Out disable SCC clock In enable SCC clock SCC clock enable In Strap None used D...

Page 84: ......

Page 85: ...at slot 1 The H P Disk Interface circuit pack is the link to the disk drive and transfers data to and from the bus used for recording on or reading from the disk The stored program on the H P Disk Int...

Page 86: ...grounded surface 3 Make sure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty pack is in the standby p...

Page 87: ...de At the Switch and Status Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch t...

Page 88: ...ng Function Setting Factory On site Jumper None used Strap None used DIP Switch None used Rotary Switch None used Switch None used Note There are no customer definable options on this circuit pack Inf...

Page 89: ...t Disable disk Port interrupt Same as factory Jumper R Watchdog timer reset Same as factory Strap None used DIP Switch None used Rotary Switch None used Switch None used Notes Note 1 See Figure 8 1 No...

Page 90: ...74 Disk Interface circuit pack 297 1001 536 Standard 01 03 August 1996 Figure 8 1 Disk interface A11 and B11 circuit pack NT6M66AH 380 Mbyte disk drives options Jumper R Jumper A...

Page 91: ...Disk Interface circuit pack 75 DPP Card Replacement Guide BCS35 and up Figure 8 2 Disk interface A11 and B11 circuit pack NT6M66AC and NT6M66AL 72 Mbyte and 140 Mbyte disk drives options...

Page 92: ...rupt Jumper R In Watchdog timer reset Strap None used DIP Switch None Used Rotary Switch None Used Switch None Used Table 8 4xxx Disk interface PCA A11 and B11 option references part number NT6M66AL 7...

Page 93: ...terface and control for commands and data to and from the Main CP at slot 1 The SCSI circuit pack provides the following capabilities Interface to implement 380 Mbyte disk drives with the 56K polling...

Page 94: ...or logic analyzer emulator and test support factory use only RS 232 compatible port for local diagnostics System interface is via the 100 pin edge connector The EPROM at U3 is a 27C512 type Removing j...

Page 95: ...d surface 3 Make sure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty SCSI pack is in the standby proc...

Page 96: ...he Switch and Status Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active processor the PRIME processor c Turn the Mode Switch to the r...

Page 97: ...Card Replacement Guide BCS35 and up Figure 9 1 SCSI circuit pack A11 and B11 NT6M66BA 380 Mbyte Disk Drives with 56K polling and 760 Mbyte Disk Drives and NT6M66BD 1700 Mbyte disk drives options BARCO...

Page 98: ...Y Arbitration In position is compatible with existing disk BCS25 28 crossover PCAs Out P7 Out BSYIN BSYOUT separate In BSYIN BSYOUT tie together In position is compatible with existing disk BCS25 28 c...

Page 99: ...tion The DSI circuit packs main function is to receive call record AMA data blocks from the DMS 100 to process those records where required and to make this data available for transfer to the correct...

Page 100: ...ure the replacement circuit pack matches the faulty circuit pack s part number and has the correct revision level Also make sure the suspected faulty DSI is in the standby processor Verify that any ap...

Page 101: ...cted 10 Place the active processor unit in PRIME mode At the Switch and Status Panel a Press the A B Select Switch to match the active processor b Make the O P Mode Select Switch P Make the active pro...

Page 102: ...A and NT6M70CF Device type number Position setting Function Setting Factory On site Strap None used DIP Switch S1 S1 1 On 6 On 8 On 10 On 2 Off 3 Off 4 Off 5 Off 7 Off 9 Off Must be the same as the fa...

Page 103: ...DSI circuit pack 87 DPP Card Replacement Guide BCS35 and up Figure 10 1 Data stream interface A12 B12 A13 and B13 circuit packs NT6M70AA and NT6M70CF options S2 S1...

Page 104: ...ot on PCB 1 A D G U41 RAM SIZE2 8K x 8 32K x 8 SW1 position 8 9 SW1 position 9 8 On Typical Off On Alternate RAM Off U52 RAM SIZE2 8K x 8 32K x 8 Straps G Straps H In Typical In DIP Switch S1 X On 1 2...

Page 105: ...erence only Use this data for verification during initial DPP system installation and or circuit packs replacement to make sure the replacement circuit packs are set up the same as the circuit packs b...

Page 106: ...90 DSI circuit pack 297 1001 536 Standard 01 03 August 1996 Figure 10 2 Data stream interface A12 B12 A13 and B13 circuit packs NT6M70AC options S2 CD GH EF AB S1...

Page 107: ...7 Off 9 Off Must be the same as the factory setting DIP Switch S2 S2 1 On 4 On 2 Off 3 Off Rotary Switch None used Switch None used Jumper None used Notes Note See Figure 10 1 Note There are no custo...

Page 108: ...ry setting U42 EPROM SIZE 2764 2732A 27128 27256 27512 Straps B D Straps F Straps B E D Straps B E C Straps A E C In Typical Note In PIN 1 is In shown as In white dot In on PCB 1 A D G U41 RAM SIZE2 8...

Page 109: ...e 1 There are no customer definable options on this circuit packs Information is shown for reference only Use this data for verification during initial DPP system installation and or circuit packs rep...

Page 110: ......

Page 111: ...lator provides circuitry to terminate the end of the bus which prevents ringing oscillation of signals on the bus See Table 11 1 for the option settings on this circuit pack Figure 11 1 shows the circ...

Page 112: ...e right and release 6 Make sure the active processor unit ONLY status lamp lights 7 Power down the standby chassis CAUTION Since all DPP circuit packs are static sensitive be careful when handling the...

Page 113: ...heck the folding of the DSI cables Do not crimp these cables 15 Insert the two screws to hold the cable shield in place Do not overtighten 16 Reinsert the DSI circuit packs in slots 12 and 13 and the...

Page 114: ...e Switch to the ONLY position for the active processor 4 Press the processor A B Select Switch to the position A or B that matches the active processor 5 Turn the Mode Switch Turn to the right and rel...

Page 115: ...Hold the cables out of the way Remove the suspected bus terminator circuit pack by inserting a finger in the hole provided in the circuit pack Apply firm even pressure to remove the circuit pack 13 In...

Page 116: ...he DSI cables 19 Apply power to the chassis 20 Wait for start up activity to end and the message S W loaded Set the DPP ONLY processor to PRIME mode Set the O P selector switch to P Turn the mode inse...

Page 117: ...On site Jumper None used Strap None used DIP Switch None used Rotary Switch None used Switch None used Note 1 There are no customer definable options on this circuit pack Information is shown for ref...

Page 118: ...102 Replacing bus terminator circuit pack 297 1001 536 Standard 01 03 August 1996 Figure 11 1 Bus terminator A14 and B14 circuit pack NT6M68AA options...

Page 119: ...perating power for the circuit pack The 12 V dc 12 V dc 8 V dc and 5 V dc supplies are all monitored and connected to guarantee power to the circuit pack as long as at least DPP power supply is operat...

Page 120: ...a tristatable octal buffer integrated circuit The ASEL signal from the Error Control II circuit pack determines the input to output connection The P A Comm circuit pack may use either internal or ext...

Page 121: ...serve all safety procedures for operations on live equipment 1 1 Wait for a low traffic period if possible Make sure no polling is occurring 2 Notify technical assistance personnel of the temporary lo...

Page 122: ...Reattach any cables removed in step 6 in reverse order Office alarms cease as the MMI links reactivate 10 Properly reroute all cables Make sure all wires and cables are routed so they are not pinched...

Page 123: ...s previously removed 4 From step 3 18 Reattach the front panel of the chassis If removed Notes Note 1 Make sure any circuit pack option settings are correct before replacement Improper performance can...

Page 124: ...e used Rotary Switch None used Switch None used Notes Note 1 There are no customer definable options on this circuit pack Information is shown for reference only Use this data for verification during...

Page 125: ...it pack does not support polling on digital data lines use for an analog network only 2 There are no customer definable options on this circuit pack Information is shown for reference only Use this da...

Page 126: ...the factory setting Jumper J16 1 2 channel 4 on the Quad SIO controlled by the Quad SIO and the setting of J14 2 3 channel 4 on the Quad SIO controlled by the setting of J14 only Channel 4 control sel...

Page 127: ...lock is from the Quad SIO in slot A1AxA6 Off Off Off Off Rotary Switch None used Switch None used Notes Note 1 See Figure 12 1 Note 2 This circuit pack does not support polling on digital data lines u...

Page 128: ...munications A16 circuit pack NT6M84AA release 07 and NT6M84BA options X X X X X X X X X X X J16 J17 J14 S1 S2 J15 Notes 1 The NT6M84AA release 07 does not support polling on digital data lines use for...

Page 129: ...ctory setting Jumper J16 1 2 channel 4 on the Quad SIO controlled by the Quad SIO and the setting of J14 2 3 channel 4 on the Quad SIO controlled by the setting of J14 only Channel 4 control select Fo...

Page 130: ...f Off Off Rotary Switch None used Switch None used Notes Note 1 See Figure 12 1 Note 2 This circuit pack supports polling on digital data lines or on an analog network For use with digital lines check...

Page 131: ...erface circuit pack to both disk drives For 380 and 760 Mbyte disk drives the Disk Controller circuit pack is inside the disk drive For the 72 and 140 Mbyte drives the Disk Controller circuit pack is...

Page 132: ...RNING Since the DPP is powered up during this procedure observe all safety procedures for operations on live equipment 1 1 Wait for a low traffic period if possible Make sure no polling is taking plac...

Page 133: ...the suspect assembly loose from its mounting position 8 Mount the replacement assembly in the vacated position and reconnect any cables removed in step 7 in reverse order Verify the repair by switchi...

Page 134: ...ngs and produce faultlike symptoms in the DPP Note 2 If the circuit pack at A15 is being replaced use a Styrofoam block or another insulating material about 1 x 1 x 5 to insulate the pins of the 16 pi...

Page 135: ...tion Setting Factory On site Jumper J5 Center pin to A pin Center pin to B pin Processor A select Processor B select A B Strap None used DIP Switch None used Rotary Switch None used Switch None used N...

Page 136: ...er circuit packs 297 1001 536 Standard 01 03 August 1996 Figure 13 1 Disk II crossover A15 and B15 circuit pack NT6M72AC NT6M72AD and NT6M72AE 72 thru 380 Mbyte disk drives w o 56K or compression poll...

Page 137: ...drives this circuit pack provides data management and data control for Winchester type disk drives The disk controller circuit pack uses as its host interface the industry standard 8 bit parallel bidi...

Page 138: ...ory setting Jumper W1 1 2 2 parity enabled 3 parity disabled Host Parity 1 2 Must be the same as the factory setting Jumper W2 Not used Jumper W3 W4 W3 W4 Bytes Per Sector open open 128 short open 256...

Page 139: ...CTOR SIZE NOT USED W3 W8 W5 W6 W7 W4 W1 W0 Disk controller circuit pack Located directly on top of the 72 Mbyte and 140 Mbyte disk drives this circuit pack provides data management and data control fo...

Page 140: ...124 Disk Crossover and Controller circuit packs 297 1001 536 Standard 01 03 August 1996 Note This pack is not field changeable...

Page 141: ...ory On site Jumper W0 0 1 2 3 4 5 6 7 State Pri shorted I D 0 shorted I D 1 shorted I D 2 shorted I D 3 shorted I D 4 shorted I D 5 shorted I D 6 shorted I D 7 SCSI Controller ID Defines the SCSI devi...

Page 142: ...rcuit pack Information is shown for reference only Note 3 Only present on the 72 Mbyte and 140 Mbyte disk drives Notes Note 1 Refer to information earlier in this document Note 2 There are no customer...

Page 143: ...Card Replacement Guide BCS35 and up Figure 13 4xxx Disk controller A21A1 and B21A1 PCA 680 9143 options J10 W1 J1 W0 1 2 3 4 5 6 7 RAM SEQUENCER RAM BUFFER Z8 MICROPROCESSOR EPROM OPTIONAL RAM ENC DE...

Page 144: ...7 is the highest priority in a multi controller configuration 0 Must be the same as the factory setting Jumper W1 1 2 2 parity enabled 3 parity disabled Host Parity 1 2 Must be the same as the factory...

Page 145: ...is the highest priority in a multi controller configuration 0 Must be the same as the factory setting Jumper W1 1 2 2 parity enabled 3 parity disabled Host Parity 1 2 Must be the same as the factory...

Page 146: ......

Page 147: ...the SCSI disk drives Power from both A and B chassis is provided at this connector in a diode OR ed arrangement for redundancy purposes The SCSI XOVR circuit packs provide the following functions Int...

Page 148: ...ING Since the DPP is powered up during this procedure observe all safety procedures for operations on live equipment 1 1 Wait for a low traffic period if possible Make sure no polling is taking place...

Page 149: ...able J4 then any cables and screws connected to the suspected circuit pack 3 4 Gently pull the suspect assembly loose from its mounting position 8 Set the A B jumper Then mount the replacement assembl...

Page 150: ...performance can be caused by incorrect settings and produce faultlike symptoms in the DPP Note 2 If replacing the circuit pack at A15 i use a Styrofoam block or another insulating material about 1 x 1...

Page 151: ...d Rotary Switch None used Switch None used Notes Note 1 See Figure 14 1 Note 2 There are no customer definable options on this circuit pack Information is shown for reference only Use this data for ve...

Page 152: ...3 August 1996 Figure 14 1 SCSI crossover A15 and B15 circuit pack NT6M93AA 380 Mbyte disk drives with 56K polling 760 1700 Mbyte disk drives options 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 J5 BARCOD...

Page 153: ...Removed SCSI Disk Crossover cir cuit pack A15 Hinged Card Panel Open Power and Alarm Communication circuit pack A16 Left Rear A Chassis with Cabinet Back Removed Hinged Card Pan el Closed Power and Al...

Page 154: ......

Page 155: ...or the Serial Communication Controller SCC ports Support for V 35 and RS 232 interface for the SCC ports Full hardware implementation no software required Two 40 pin access ports one for each of the 5...

Page 156: ...ing place 2 Notify technical assistance personnel of the temporary loss of the polling links DPP systems with 56K polling use a path through the 56K Xovr to the 56K Connector circuit pack for polling...

Page 157: ...he maintenance terminal enter TEST ACT cr TEST STDBY cr Test the polling function 12 If alarm status shows active alarms resolve all alarm conditions present 13 Seat the rear panel in its fully seated...

Page 158: ...s see if they are still failing Notes Note 1 Verify the cable markings identification or attach labels to the cables as they are removed to facilitate replacement in the correct positions Note 2 Make...

Page 159: ...sis with Cabinet Back Removed SCSI Disk Crossover cir cuit pack B15 Hinged Card Panel Open 56K Xvr circuit pack B16 Left Rear B Chassis with Cabinet Back Removed Hinged Card Pan el Closed 56K Xvr circ...

Page 160: ...e Jumper None used Strap None used DIP Switch None used Rotary Switch None used Switch None used Notes Note 1 There are no customer definable options on this circuit pack Information is shown for refe...

Page 161: ...Card Replacement Guide BCS35 and up Figure 15 2 56K Crossover B16 circuit pack NT6M48AA Options 2 3 4 5 6 7 8 9 10 1 NT6M48_ _ REL 56K XOVR 11 12 13 14 2 3 4 5 6 7 8 9 10 1 11 14 12 A B C D E F G A B...

Page 162: ......

Page 163: ...between a single 50 pin ribbon cable and four DB 25 connectors It is totally passive containing connectors only no active circuitry It supports all EIA interface leads for synchronous operation The p...

Page 164: ...o modem telephone line and serial channels physical interface serial channels and the P A Comm circuit pack Interface between this circuit pack and the P A Comm circuit pack is via a 50 pin ribbon cab...

Page 165: ...this procedure observe all safety procedures for operations on live equipment 1 Wait for a low traffic period if possible Make sure no polling is occurring 2 Notify technical assistance personnel of t...

Page 166: ...Gently remove the pack from its position 9 Insert the replacement pack in the vacated position 10 Reattach any cables removed in step 6 Office alarms cease as the polling links reactivate 11 Properly...

Page 167: ...up Figure 16 1 Four channel communications A17 circuit pack NT6M85AA options J1 J2 J3 J4 J9 J8 J10 J6 J7 Notes 1 When used with digital data lines make sure this pack is release 03 or later 2 Jumpers...

Page 168: ...ting Jumper J7 2 3 1 2 ADU Operation No ADU operation EIA on chan 1 2 1 2 Must be same as factory setting Jumper J8 2 3 1 2 ADU Operation No ADU operation EIA on chan 1 2 1 2 Must be same as factory s...

Page 169: ...Four channel communication circuit pack 153 DPP Card Replacement Guide BCS35 and up Figure 16 2 56K connector panel assembly B26 panel NT6M65AA options J13 J14 J11 J12 J9 J10 M T D 1 M T D 0...

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Page 171: ...i e when the required spare parts are near at hand Since the processor and disk in the chassis are powered down make sure the processor mode and the disk mode are ONLY toward the other chassis and dis...

Page 172: ...supply The power supply has the 48 V dc circuit fused A GMT type fuse is used These fuses have a spring loaded colored flag which opens when the fuse is blown To replace pull the blown fuse straight...

Page 173: ...ment information Fuse function Fuse function Amperes color Fuse type and replacement part number Power Supply 48 V dc from CO 10 Grn 10 ampere fuse Buss GMT 10 NT part No A0108995 Fan Filter PCA Assem...

Page 174: ...3 Power down the faulty power supply See Figure 17 1 Remove the 48 V dc C O power Remove the 48 V dc source for the processor chassis at the DMS 100 fuse panel disk drive in this chassis is now disab...

Page 175: ...undant Type DISK MODE x P where x A or B depending on whether the disk mode is A0 or B0 14 Reinstall the front panel of the DPP Tighten the four captive screws on the left and right hand sides of the...

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Page 177: ...ta collection center The DMS 100 DIRP manages the flow of AMA data from the DMS 100 to the DPP The DPP functions as the AMA data formatter BCS25 26 and collector and as the AMA transmitter The remote...

Page 178: ...o reduce the number of interrupts required for program data transfers DPP Distributed Processing Peripheral A peripheral device of the DMS 100 that functions as an AMA data collector and an AMA transm...

Page 179: ...e A terminal port at the DPP to support the Emergency Administrative Terminal EAT Emergency Administrative Terminal A maintenance terminal connected directly to the DPP that is used for performing var...

Page 180: ...o a magnetic tape The tape is used by the Revenue Accounting Office for computing customer billing IC Integrated Circuit A series of interconnected active and passive electronic devices integrated int...

Page 181: ...ls a communications bus between the DPP processors RAM Random Access Memory A static read write memory system in which information is stored in discrete individually addressable locations such that ac...

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Page 184: ...and shall protect same in whole or in part from disclosure and dissemination to third parties and use same for evaluation operation and maintenance purposes only Information is subject to change with...

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Northern Telecom BCS35, Replacement Manual

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Summary of Contents for BCS35

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