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User Manual
Central Office SAM128

 

 

 

 

CO SAM128
Version 2.1
February, 2001

 

 

FCC Information
As per Federal Communications Commission Rules concerning radio frequency emissions, this device complies with FCC Part 15, Subpart J for class A computing devices.

Warning
This device generates, uses, and can radiate radio frequency energy and if not installed in accordance with the System Practice, may cause interference to radio communications. It has been tested and found to comply within the limits for a class A computing device pursuant to Subpart J of Part 15 of the FCC Rules designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference.

Antistatic Precautions
Electrostatic discharge ( ESD ) results from the buildup of static electricity and can cause damage to electronic components. ESD precautionary practices are required when installing, configuring, or repairing the CO SAM. Use of a wrist strap is recommended. Do not use conductive tools to change parts or jumper settings in the CO SAM.

NEBS Compliance
This Class 2 data communications equipment has been Level 3 NEBS compliance tested and approved under the guidelines specified by the Bellcore GR-63-CORE, and Bellcore GR-1089-CORE Technical References. The CO SAM conforms to the UL Standard for Safety, ANSI/UL 1950, Third Edition.

Warranty
The manufacturer warrants that this equipment is free from defects in materials and workmanship. The warranty period is five years from the date of shipment. The manufacturer's obligation under this warranty is limited to the repair or replacement of the defective equipment provided it is returned, shipping prepaid, within a reasonable period of time. This warranty shall not apply to equipment that has been subject to accident, misuse, alterations, or repairs not made or authorized by the manufacturer.

Copyright
This publication and the equipment it describes contain proprietary information. No part of this document may be copied or reproduced in any form without permission from the manufacturer. The information in this document is subject to change without notice. The manufacturer assumes no responsibility for damages resulting from the use of this document, including but not limited to, lost revenue, lost data, or other damages.

Technical Support
For technical support call 1-800-881-8202.

 

INDEX

OVERVIEW

CO SAM128 SYSTEM DESCRIPTION

HARDWARE COMPONENTS

POWER SUPPLIES

TCONB ( TN1394B or TN1394C) Module
TERM32 (UN315) Module

TRUNK MODULES

CONTROLS AND INDICATORS
TERM32 MODULE
POWER SUPPLIES

INSTALLATION

INSTALLATION OPTIONS
POWER AND GROUNDING
DATABASE ADMINISTRATION
TROUBLESHOOTING AND DIAGNOSTICS
MAINTENANCE
SPECIFICATION
LIST OF FIGURES

FIGURE 1: CO SAM128 FACEPLATE
FIGURE 2: CO MUX UNIT
FIGURE 3: FAN ASSEMBLY
FIGURE 4: FACEPLATES
FIGURE 5: POWER SUPPLY
FIGURE 6: CO SAM128 DIMENSIONS
FIGURE 7: REAR PANEL DC GROUNDING
FIGURE 8: INSTALLATION DETAILS - T1-TRUNK MODULE
FIGURE 9: BACKPLANE CONNECTIONS
FIGURE 10: CBM1 CIRCUIT BOARD

LIST OF TABLES

TABLE 1: TERM32 MODULE - I/O CONNECTOR
TABLE 2: I/O PINOUT (J1-J11)
TABLE 3: TERM32 FACEPLATE
TABLE 3a: TCONB FACEPLATE
TABLE 4: T1 TRUNK AND HS-TRUNK, SAMSL AND SAMDL FACEPLATES
TABLE 5: REQUIRED TOOLS
TABLE 6: CONNECTOR PORT RELATIONSHIP
TABLE 7: CO SAM128 TROUBLESHOOTING

 

 

Overview
This manual covers the equipment, installation, and operation of the CO SAM128, multi-purpose concentrator. It includes information about:

  • The CO SAM128 and its hardware components
  • Controls and indicators
  • Installation procedures
  • Operating procedures
  • Troubleshooting and diagnostics
  • Maintenance
    • Replacement of filters
    • fans
    • power supplies
  • System specifications
  • Support

CO SAM128 System Description
The CO SAM128 is a synchronous/asynchronous data concentrator which multiplexes from 1 to 128 ports onto a single trunk line to a Datakit® VCS, Datakit® II VCS or BNS-2000 node. It can be configured for AC or DC operation. AC input range is 90 to 264 VAC, while the DC ranges from -42 to -64 VDC.

The basic system is equipped with one controller board (TN1394B or TN1394C) and one TERM32 board. This single TERM32 board provides 32 synchronous/asynchronous host or user ports. Options that are available include:

  • Additional TERM32 boards (for a total of 4)
  • T1-Trunk
  • HS-Trunk
  • SAMSL V.35
  • SAMSL RS232
  • SAMDL RS232
  • AC or DC power supplies

 


POWER SUPPLIES

AC Power Supply
The AC power Supply is a 140 watt auto ranging (90-132/180 through 264 VAC, 50-60 Hz) supply with a main +5 VDC output rated at 20 Amps and two auxiliary 12 VDC outputs rated for 5A(+) and 3A(-). It has overload and short circuit protection for all outputs and overvoltage protection for the main output. The supply requires 25 CFM of forced cooling at full rated load which is provided by an internal fan unit.

DC Power Supply
The DC power supply is a 125 watt, -42 to -60 VDC input supply with a main +5VDC output rated at 20A and two auxiliary 12VDC output rated at 5 Amps each. It has overload and short circuit protection for all output and overvoltage protection for the main output. This supply also requires 25 CFM of forced air cooling at a full rated load which is provided by an internal fan.

Fan Tray Assembly
The Fan tray assembly consists of two fans, a fan filter circuit board, and the fan particle filter. This unit is accessed from the front of the CO SAM128 and slides out for service. The fans are powered from the backplane on 24 VDC through connector J24.

Fan Alarm Panel
The front cover (see page 4) of the CO SAM128 contains four LEDs to indicate various alarms, a reset button, and an alarm cutoff switch. The LEDS are listed below:

LEDIndication / Action
Fan1Fan1 nearest front panel failed
Replace fan
Fan2Fan2 nearest back panel failed
Replace fan
OfflineFan alarm cut off switch operated
Fault 

Alarm messages
The CO SAM128 provides the following alarm messages upon fan failure:

This Alarm message is reported at the Datakit® console when a fan fails.

REPORT ALARM: Sammaint: Alarm Grid Activated

This Alarm message is reported at the Datakit® console when the alarm sounds. (Approx. 10 seconds after the first message.)

REPORT ALARM: Sammaint: Alarm generated by TCON or alarm monitor circuit

 

TCONB ( TN1394B or TN1394C) Module
The TCONB module is the controller for the CO SAM128. The functions of this module are listed below:

  • Acts as an interface between the trunk module and the TERM32 boards.
  • Control of the node, Time Division Multiplexer (TDM), and download buses.
  • Initializes the trunk module
  • Downloads and controls up to 16 processor stations located on the TERM32 Modules.
  • Receives the primary download from the node for downloading to the TERM32 modules.
  • Accumulation and reporting of status data for the CO SAM128.
  • The TCONB module emulates the node clock, switch and integral control computer functions for the CO SAM128.

All of the functions listed are transparent to the user. The TCONB module only communicates with the integral control computer and the stations that control the user ports. The TCONB module does not use an I/O distribution board.

TERM32 (UN315) Module
The TERM32 module can interface with terminals, host computers, PCs, or modems. This board may provide 32 serial, asynchronous, full-duplex ports that run at s peeds up to 19.2 Kbps. It may also provide 32 serial, synchronous, full-duplex ports that run at speeds up to 9.6 Kbps. The TERM32 board also supports Autobaud detect.

In the asynchronous mode, the TERM32 module optionally supports XON/XOFF flow control and clear to send and request to send (CTS/RTS) flow control. It supports odd, even and no parity features. In the synchronous Data Carrier Equipment (DCE) mode, the TERM32 generates the transmit and receive clocks, and in the synchronous Data Terminal Equipment (DTE) mode, it accepts synchronized transmit and receive clocks.

There five types of diagnostic loop-around tests provided for this module. These will be discussed later in this document. I/O connections to the TERM32 modules are made through twenty-two DBMini50-pin connectors on the rear panel of the CO SAM128. The relationship between the TERM32 modules and I/O connections are shown in the following tables.

Trunk Modules

T1-TRUNK (TN1392) Module
The T1-TRUNK module provides long distance high or medium speed, point to point communication from the CO SAM128 over common carrier equipment to the supporting node. The supporting node utilizes the complementary T1-TRUNK module (TN1015).

This module supports a maximum of 512 virtual circuits, with 504 available for users and 8 for control. Actual virtual circuit capacity is a function of user traffic characteristics and speed of the CO SAM128 to node connecting link.

The CO SAM128 T1-TRUNK module does not have a corresponding I/O distribution board but comes equipped with a module to Data Service Unit (DSU) connecting cable that provides a 37 pin RS-449 type receptacle connector labeled J12. RS-422 data and clocking signals are used along with RS-232C control lead signals for this trunk connection.

HS-TRUNK (TN1391) Module
The HS-TRUNK module is installed in the CO SAM128 to provide limited distance, high speed, point to point communication over a fiber-optic link to support the node. The supporting node uses a complementary node HS-TRUNK module.

This module supports a maximum of 512 virtual circuits, 504 for users and the remaining for control. The high speed link is capable of running at 8 Mbps on the optical fibers up to a maximum distance of three km.

The HS-TRUNK module is a simple state machine, not programmable. There is a CRC check to detect bad frames, which are discarded. Error correction and re-transmission are the responsibility of either the interface modules or the high level protocol involved. The recommended fiber cable is a multimode fiber (62.5/125mm) cable terminated with ST style connectors.

I/O connections are made through the rear panel with access to the CEY1 I/O distribution board.

SAMSL (MC1D090A1B) Module
The SAMSL module is the wire interface at each end of a DDS or analog transmission facility connecting a Datakit® II VCS or BNS-2000 node and a SAM. It supports EIA RS-232C connections at 9.6 or 19.2 Kbps and V.35 connections at up to 56 Kbps. It also provides software for boot-up diagnostics, loop diagnostics and channel selection.

The SAMSL I/O connections include:

  • V.35 - The CEY2 I/O-DB provides one 34 pin, Winchester-type, V.35 DTE receptacle connector accessed from the rear panel. DSUs are required.
  • RS-232C - The CEY3 I/0-DB provides a 25 pin subminiature RS-232C DTE receptacle connector accessed form the rear panel. DSUs are used in this configuration.

SAMDL (MC1D106A1) Module
The SAMDL module is a wire interface at the CO SAM128 end of a DDS or analog transmission facility. It connects to a SAMML in the node. It supports two EIA RS-232C port connections.

The SAMDL I/O connection is through a CEY4 I/O-DB. It provides one 25-pin subminiature, receptacle connector. It uses an ED5P055-31, G219 cable to convert from a single 25-pin RS-232C plug subminiature to two, 25-pin plug subminiature connectors.

Controls and Indicators
Faceplate controls and indicators are used to monitor and control the CO SAM128 modules. There are similar faceplates on the TERM32, TCONB and trunk modules. The power supplies have no indicators but are equipped with test points to verify the output voltages.

TERM32 Module
The TERM32 module contains two indicator lights and a trace channel connection.

Power Supplies
The AC and DC power supplies provide no indicators on the faceplates. There are four terminals provided as test points to measure the output voltage for each voltage. Output voltage can be measured using a high impedance DC voltmeter.

Installation

Introduction
The CO SAM128 is designed for operation in either a customer premises or Central Office (CO) environment. At the customer premises location, the CO SAM128 can be placed on the floor, on a table, in a rack or on other equipment provided forced air from that equipment is not directed at the CO SAM128. Both the front and rear of the CO SAM128 should be unobstructed. The sides should have a minimum clearance of at least 3 inches per side. These requirements apply to the CO SAM128 as well as the customer premises. In the CO, the equipment may be placed in an available rack.

Installation Options

Basic CO SAM128
The Basic CO SAM128 comes equipped with on TERM32 module which provides 32 user ports. Additional TERM32s are required to increase the user ports to 128.

The basic unit is also equipped with a TCONB controller module. The TCONB module occupies the second slot and the TERM32 module is in the third. When used, the additional TERM32s should be placed in the next available consecutive slot.

Trunk
The CO SAM128 can be configured for one of several trunk modules. These include, the T1, fiber DDS (RS232C or V.35). No trunk module is included with the basic CO SAM128. Both the trunk module and trunk I/O circuit are added as options. The trunk module is located in the left most slot, slot 1.

Power Supply
The CO SAM128 can operate on either AC or DC input voltages. The universal input AC supply or DC input supply must be specified. The power supply is placed in the rightmost slot.

Power and Grounding

AC Power and Ground Requirements

110AC (Nominal)
The 110VAC (50-60Hz) connections to the CO SAM128 requires a ground circuit with a 4A capacity. Connections is through the power cord supplied with the CO SAM128. The power cord must be connected to a grounded AC outlet. The ON/OFF circuit breaker provides input fusing.

220VAC
The 220VAC (50-60Hz) connections to the CO SAM128 requires a grounded circuit with a 2A capacity. Connections is through the power cord supplied with the CO SAM128. This power cord must be connected to a grounded AC outlet. The ON/OFF circuit breaker provides input fusing.

There are international applications that require the power cords and plugs special ordered.

DC Power and Ground Requirements
The -48 to -60 VDC feed to the CO SAM128 should be taken from the CO signal designated supply and fused for 4A service. One #14 AWG stranded wire should be used to connect to the rear panel terminal block marked -48V. In addition, one #14 AWG stranded wire should be used to connect the +48 terminal block on the rear panel. Internal fusing is provide through the ON/OFF circuit breaker.

The CO SAM128 requires a solid, stable, "single point ground" via an external chassis ground conductor. This conductor must be free from all other connection. When the CO SAM128 is being installed, a #14 AWG stranded external grounding conductor must be connected to the stud provided on the rear of the unit using a provide Ring Terminal.

T1-Trunk Installation
To install the T1-TRUNK Module the following tools will be required;

  • Phillips head screw driver
  • Slotted screw driver
  • #4 nut driver
  • ED2P491-30, G1 Cable assembly
  • T1-TRUNK module, TN1392
  • Rear I/O panel marked "J12 RS449 TRUNK".

To install the T1-TRUNK module refer to the figure below.

  1. Remove the rear I/O panel
  2. Mount the ED2P491 cable assembly to the small cover plate using the screwlock kit.
  3. Connect the P1 and P2 connectors from cable assembly ED2P491-30, G14 to the backplane
  4. Replace with the RS449 TRUNK rear I/O panel.
  5. Route the external trunk cable, ED5P055-31, G128, (GN) to the DSU/CSU and connect it to the CO SAM128 J12 RS449 Trunk receptacle.
  6. Install the T1-TRUNK module and set the mode switch to enable.

HS-TRUNK Module Installation
To install the HS-TRUNK Module the following tools will be required;

  • Phillips head screw driver
  • Slotted screw driver
  • Rear I/O panel marked "FIBER TRUNK"
  • HS-TRUNK module, TN1391
  • HS I/O-DB, CEY1

The CO SAM128 high speed fiber trunk (HS-TRUNK) I/O-DB is equipped with two ST type connectors. The distance between the CO SAM128 and the node may not exceed 3 km.

Use the following steps to install the HS-TRUNK module and CEY1 I/O-DB.

  1. Remove the rear I/O panel.
  2. Carefully insert the CEY1 I/O-DB into the backplane pin shroud.
  3. Secure the I/O-DB to the mounting tabs using the two #4-40 x 3/16 screws.
  4. Replace with the FIBER TRUNK I/O rear panel.
  5. Connect the two fiber-optic cables to the CO SAM128. If the cables are connected to a Datakit® BNS/VCS the MUTE light should go out, indicating connectivity. If the cables are connected to a Datakit® BNS/VCS node and the lights do not go out, flop the transmit and receive leads of the fiber cable
  6. Install the HS-TRUNK and set the mode switch to ENABLED.

SAMSL Trunk Installation
To install the SAMSL Module the following tools and equipment will be required;

  • Phillips head screw driver
  • Slotted screw driver
  • SAMSL trunk module, MC1D090A1B
  • V.35 I/O-DB, CEY2 or I/O-DB, CEY3
  • Cable assembly, ED5P055-31, G170 G(T) (CEY2) or ED5P055-31, G108 G(P) (CEY3)

The following steps are required to install the SAMSL module and either the CEY2 (V.35) or the CEY3 (RS-232C) I/O-DB.

  1. Remove the rear I/O panel and the two #4-40 x 3/16 screws from the I/O-DB mounting tabs.
  2. Carefully insert the CEY2 or the CEY3 I/O-DB into the backplane pin shroud.
  3. Secure the I/O-DB to the mounting tabs using the two #4-40 x 3/16 screws.
  4. Replace with the associated rear panel.
  5. Connect the trunk cable from the DSU to the CO SAM128. The cable used with the CEY2 I/O-DB is ED5P055-31, G170, G(T). The cable used with the CEY3 I/O-DB is ED5P055-31, G108, G(P).
  6. Install the SAMSL module and set the mode switch to the ENABLED position.

SAMDL Trunk Module Installation
To install the SAMDL Module the following tools and equipment will be required;

  • Phillips head screw driver
  • Slotted screw driver
  • SAMDL trunk module, MC1D106A1
  • RS-232C I/O-DB, CEY4
  • Cable assembly, ED5P055-31, G107G(P)

The following steps are required to install the SAMDL module and the CEY4 I/O-DB.

  1. Remove the rear I/O panel and the two #4-40 x 3/16 screws from the I/O-DB mounting tabs.
  2. Carefully insert the CEY4 I/O-DB into the backplane pin shroud.
  3. Secure the I/O-DB to the mounting tabs using the two #4-40 x 3/16 screws.
  4. Replace the rear I/O panel.
  5. Connect the trunk cable from the DSU to the CO SAM128. The recommended cable used with the CEY4 I/O-DB. This is a "Y" cable that can be connected to one or two DSUs using an ED5P055-31, G107, G(P) cable for each DSU.
  6. Install the SAMDL Module and set the mode switch to ENABLE.

TERM32 Module Installation
The TERM32 connections are made by means of the rear panel receptacles 1-22

Database Administration

New Installation
When administrating the Datakit database for the installation of a new SAM128, the SAM128 is entered as a SAM504. For example (assuming the assigned slot is 46 and the SAM128 is fully populated and equipped with a T1 trunk):

CCO> enter sam
OBJECTS: sam
COMPONENT: module
COMMENT: [up to 60 chars double quoted]
TYPE: [ sam16, sam64, sam504 ]: sam504
DOWNLOAD SERVER: [ + (controller) ]:
SOFTWARE VERSION: [ + (standard) ]:
TOTAL NUMBER OF BOARDS [1-16]: 4
TRUNK TYPE: T1
TRUNK SPEED [ 56k, 64k, 128k, 192k, 256k, 320k, 384k, 448k, 512k, 576k, 640k,
704k, 768k, 832k, 896k, 960k, 1.02m, 1.088m, 1.152m, 1.216m, 1.280m, 1.344m,
1.408m, 1.472m, 1.536m, 1.544m, 2.048m: +( 1.544m ) ]:

From this point on follow the standard procedures for entering the remaining parameters for the SAM module, the associated boards, and their ports.

Upgrade of an existing SAM64 to a SAM128
When upgrading a SAM64, and the associated database, to a SAM128 the following procedure is to be used to install the software patch that allows for the conversion of the existing database of the SAM64 to the SAM504 with only boards 1-4 supported.

Installation Procedure
This procedure assumes the active controller is 0 and the active disk is 0. To confirm the operational state enter the "dstat cc" command. If the ACTIVE CONTROL COMPUTER is not 0, or the ACTIVE DISK is not 0, change the operational state to make it so. If there is a MRCM, recovery must be configured to off. The node must be running Ver.3 R5.0 or R6.0. For R5.0 a 40 megabyte tape cartridge is provided containing the patch. A 4mm DAT cartridge is provided for R6.0. The steps in this section read the patch from the tape and install the Control Computer copy process in the correct directory on the disk.

  1. At the CCO> prompt enter utilsh
  2. At the UTILITY prompt enter cd bin/copy
  3. At the UTILITY prompt enter dkcsh ( you are now in /dkcproc/bin/copy dir)
  4. At the DKC$ prompt, enter the following sequence of commands to read the Copy process from tape:
    1. cpio -icmav < /dev/Tape1 (or Tape0 depending on your configuration)
    2. sum cbmmodule
    3. exit
  5. The output of the sum command in contains the checksum, the number of blocks, and the file name. The checksum is the first number in the output. Verify that the checksum for the cbmmodule file is 53916 for V3R5.0, and 54260 for V3R5.0. If the checksum does not match, repeat Step 'b'. If the checksum still does not match call 908-218-0500 ext31 or ext18. If the checksum matches properly, the new Copy process phase of this procedure is complete and you should continue with the activation phase.

Software Patch Activation
Utilize the following procedure to activate the patch:

  1. At the CCO> prompt move the database configuration of the existing SAM64 to an empty slot and make note of the new slot number. The move command is: move module present slot new slot - eg: mv mo 46 177 ( slots 46 and 117 are arbitrary slots picked for this example, however they will be used for the remainder of this procedure). Your slots will vary depending on you particular configuration.

  2. At the CCO> prompt enter utilsh

  3. At the UTILITY prompt enter cd bin/copy

  4. At the UTILITY prompt enter mv module module.orig

  5. At the UTILITY prompt enter mv cbmmodule module

  6. At the UTILITY prompt type exit

  7. At the CCO> prompt type copy mod 117 46. This will install the SAM504 configuration onto slot 46.

  8. At the CCO> prompt type change mod 117 and increase the board count from 2 to 4.

  9. At the CCO> prompt enter utilsh

  10. At the UTILITY prompt enter cd bin/copy

  11. At the UTILITY prompt enter rm module

  12. At the UTILITY prompt enter mv module.orig module

  13. At the UTILITY prompt enter sync

Backout Procedure
To backout the software patch on the active controller, use the following commands:

  1. At the CCO> prompt enter dvdelete mod 46. This will remove the SAM504 configuration from the database.

  2. At the CCO> prompt enter mv mod 117 46. This will return the SAM64 original configuration to the original slot 46.

NOTE: When you have completed the procedure successfully, you may use the dvdelete command to remove the data from slot 117.

Troubleshooting and Diagnostics

CO SAM128 Diagnostics
Diagnostics can be classified as online or offline and as module, board, or port diagnostics. Module diagnostics test the link in both the node and the TCONB. Board diagnostics test the integrity of a particular TERM32 circuit board in the online and offline states. Port diagnostics test the integrity of a specific port and the interface cabling connected to the port.

When the module is being tested at the module level, there are actually three circuit packs that are tested.

  • The installed trunk module in the local node
  • The installed trunk module in the SAM
  • The TCONB module in the CO SAM128

To run diagnostics on the CO SAM128, the commands must be entered at the node and the slot number of the CO SAM128 trunk board must be known.

CO SAM128 Offline Diagnostics
To execute offline diagnostics on the CO SAM128 the node console is required and the module must be out of service.

Diagnostics may run on the module.
      (diag SAM offline module)

Diagnostics on the board (Module must be in service)
      (diag SAM offline board)

Diagnostics on the cabling (Module must be in service)
      (diag SAM offline cabling)

CO SAM128 Online Diagnostics
To perform the CO SAM128 online diagnostics, the node console must be used.

Module (Module must be in service)
      diag sam online module

Port (Module and port must be in service and the port must be out of service)
      diag sam online port

Trunk diagnostics
The link between the node and the CO SAM128 can be tested using the diag samtrk command from the node console. This link can be either the HS-TRUNK, T1-TRUNK, SAMSL or SAMDL module.

The five possible tests include:

  • trk_local
  • dsu_local
  • trk_remote
  • trk_external
  • dsu_remote.

To perform these tests execute diag samtrk from the node console.

Maintenance

CO SAM128 Fan Filter
The fan filter should be cleaned or replaced as necessary. To clean the filter:

  1. Remove the front door.
  2. Remove the filter from the front of the unit by puling it out of the slot below the fans.
  3. Clean the filter under running water and allow it to dry thoroughly before reinserting it in the fan shelf.
  4. Reinsert the cleaned filter by sliding it into the slot below the fans

To insert a new filter:

  1. Remove the old filter from the front of the unit by pulling it out of the slot below the fans.
  2. Insert the new filter by sliding it into the slot below the fans.

Fan Replacement
Warning: Unplugging and plugging the fan power connector on either the backplane (J24) or the fan tray (J20) will cause unpredictable data corruption. All service to the fans must be performed with the CO SAM128 offline and the system powered down.

The tools and equipment required to replace a faulty fan unit are listed below:

  • Fan
  • Phillips head screwdriver
  • Slotted Screwdriver
  • Wire cutters
  • Wire strippers

The following steps may be used to replace a fan.

  1. Visually determine which fan has failed. Turn off the power to the CO SAM128
  2. Remove the front door and the two phillips heads screws from the front of the fan tray.
  3. Carefully slide out the fan tray until the fan filter circuit board is visible.
  4. Unplug the white connector from the circuit board and then slide out the fan tray.
  5. Disconnect the wires for the faulty fan from TB26
  6. Remove four screws and washers and the finger guard from the top of the fan and lift out the fan.
  7. Place the new fan on the tray so the wiring can be read from the top.
  8. Replace the finger guard, washer, and screws to hold the fan to the fan tray.
  9. Reconnect the wires for the fan on the TB26
  10. Slide the fan tray in half way and reconnect the white plug then slide the fan tray in completely.
  11. Secure the fan tray and apply power to the system. Visually verify the fans operation.
  12. Replace the front door.

Fan Power Filter Replacement

  1. Remove the front door, the two phillips head screws from the front of the tray, and carefully slide out the fan tray until the fan filter circuit is visible.
  2. Unplug the white connector from the circuit board and then slide the fan tray out completely.
  3. Disconnect the wires from the TB6.
  4. Remove the screws and washer from the CBM1 circuit board and replace the board.
  5. Reconnect the wires, and slide the fan tray in partially and reconnect the white plug.
  6. Secure the fan tray and power up the system.
  7. Visually inspect the fan's operation and replace the front door.

Specification
The specifications shown are for the AC and DC power supplies and the fan unit.

Power Supplies