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RTS Cronus Release Note

Telex cronus intercomsystem: release note
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Cronus
Release
Notes
CRN - Rev E 2/2006

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Summary of Contents for RTS Cronus

  • Page 1 Cronus Release Notes CRN - Rev E 2/2006...

  • Page 3: Table Of Contents

    DC Bias Isolation Enhancement (7787 Rev B to Rev C and 7800 Rev A to Rev B) CHAPTER 3 Cronus and RVON-I/O 11 When the RVON-I/O is connected to a Master Controller Backcard in a Cronus Chassis, the RVON-I/O GPO will not drive the Cronus GPI..11 Table Contents ...

  • Page 5: Cronus Hardware Release Notes

    Since the release of Cronus Intercom System, a few enhancements and added features have been made to the original unit. This document covers these changes and how to upgrade existing boards, if needed. Added Features and Enhancements • Upgraded/New front and rear card •...

  • Page 6: New Aio Front Card (9030-7784-001)

    UART signals which are assigned next to each other on the backplane connector. • The analog input/output gain structure of Cronus is not in line with ADAM and Zeus. To upgrade the gain structure, see “Gain Enhancement (Rev C to Rev D)” on page 6.

  • Page 7: Comparison Between Old Board -000 And New Board -001 Gain Structure

    Hardware Compatibility When a new Cronus AIO front card requires the use of a new Cronus AIO rear card (9030-7787-001) or Cronus MDR rear card (9030-7800-001). It will not work with the old board -000 rear card because signals are rerouted to eliminate the Party Line noise.
  • Page 8 Cronus Hardware Release Notes...

  • Page 9: Rework Instructions

    AIO Front Card (9030-7784-000) Codec Synchronization (Rev B to Rev C) If you currently have the old Cronus AIO board and need to fix the audio distortion from the CODECs being asynchronous, do the following: Identify test points TP4, TP18, TP19, and TP28 on the front side of the board.

  • Page 10: Gain Enhancement (Rev C To Rev D)

    To send the board back o the factory for upgrade, send the card via UPS to: Factory Service Telex Communications, Inc. 8601 East Cornhusker Hwy Lincoln, NE 68507 U.S.A. Attn.: Jim Wilson NOTE: Include a note stating that the card is needing Gain Structure Upgrades Wire Placement on the Cronus Front Card...
  • Page 11 AIO Front Card (9030-7784-000) To Upgrade the Gain Structure yourself, do the following: On the front card, replace the following 16 resistors with a 220k resistor (part number 102506-224) The resistors that change are the following: R13, R14, R15, R16, R17, R18, R19, R20, R34, R35, R36, R37, R38, R39, R40, R41 Resistors and capacitors that need to change to upgrade the gain amount.

  • Page 12: Aio Front Card (9030-7784-001)

    Rework Instructions On the front card, ground TP7 to connector J3 pin C1 so it will be recognized as the new Rev D card. See figure 3. TP7 Ground to J3 C1 connector placement FIGURE 3. On the front card, replace the following 16 capacitors with 12pF capacitor (part number 723411-14). See figure 2. The capacitors that change are the following: C9, C10, C15, C16, C21, C22, C27, C28, C76, C77, C82, C83, C88, C89, C94, C95.

  • Page 13: Aio Backcard (9030-7787-000, 001) And Mdr Backcard (9030-7800-001)

    AIO Backcard (9030-7787-000, 001) and MDR Backcard (9030-7800-001) The modified AIO front card should have the reference markup changed from 9030-7787-001 Rev B to Rev C. See figure 4. & & & & New AIO board capacitor placement FIGURE 4. AIO Backcard (9030-7787-000, 001) and MDR Backcard (9030-7800-001) DC Bias Isolation Enhancement (7787 Rev B to Rev C and 7800 Rev A to Rev B) After changing the design to have an option for analog output gain up to +20dB, the AIO card (9030-7784-001) has exhibited...
  • Page 14 Rework Instructions The 16 affected parts are L33, L34, L35, L36, L37, L38, L39, L40, L41, L42, L43, L44, L45, L46, L47, L48. & & Capacitors on the RJ 12 (A) rear card and the MDR (B) rear card. FIGURE 5. IMPORTANT: The positive end of the capacitor should point toward J1 connector (see inset of figure above.

  • Page 15: Cronus And Rvon-I/O

    RVON-I/O board updates for rev escalation from Rev A to Rev B. The RVON-I/O’s voltage drop across the GPO Output resistor is too large for the Cronus photo coupler GPI. The Cronus series resistor to the photo-coupler is also too large. The voltage drops across both resistors prohibit operation.
  • Page 16 Cronus and RVON-I/O On the RVON-I/O card remove 8 resistors (R24 through R431) and replace with 6.19 K resistors (part number 102515-276). See Figure 1 for resistor placement. Resistor Changes on RVON-I/O (9030-7772-000) FIGURE 6. R424 R428 R427 R429 R426...
  • Page 17 When the RVON-I/O is connected to a Master Controller Backcard in a Cronus Chassis, the RVON-I/O GPO will not drive the Cronus On the Cronus MC Back card, remove the 3K resistors (R11 through R14). Replace the resistors with 470 Ohm resistors (part number 102513-471).
  • Page 18 Cronus and RVON-I/O...

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