Compaq Memory Channel Hub User manual

DIGITAL2T-CCMHA-CBCentralOffice
MemoryChannelHub
Installation/ServiceGuide
Part Number: EK-MCHCO-IN. A01
December 1998
Compaq Computer Corporation
Houston, Texas

December 1998
The information in this publication is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL
ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL. THIS
INFORMATION IS PROVIDED “AS IS” AND COMPAQ COMPUTER CORPORATION DISCLAIMS ANY
WARRANTIES, EXPRESS, IMPLIED OR STATUTORY AND EXPRESSLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE, GOOD TITLE AND
AGAINST INFRINGEMENT.
This publication contains information protected by copyright. No part of this publication may be photocopied or
reproduced in any form without prior written consent from Compaq Computer Corporation.
FCC NOTICE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications.
Any changes or modifications made to this equipment may void the user’s authority to operate this equipment.
Operation of this equipment in a residential area may 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.
1998 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
The software described in this guide is furnished under a license agreement or nondisclosure agreement. The
software may be used or copied only in accordance with the terms of the agreement.
Compaq, Deskpro, Fastart, Compaq Insight Manager, Systempro, Systempro/LT, ProLiant, ROMPaq, QVision,
SmartStart, NetFlex, QuickFind, PaqFax, ProSignia, registered in United States Patent and Trademark Office.
Netelligent, Systempro/XL, SoftPaq, QuickBlank, QuickLock are trademarks and/or service marks of Compaq
Computer Corporation.
AlphaServer, DIGITAL, DIGITAL logo, , registered in United States Patent and Trademark Office.
The following are third-party trademarks:
Memory Channel is a trademark of Encore Computer Corporation.
S3688

iii
Table of Contents
1 Introduction
1.1 Overview .......................................................................................................... 1–1
1.2 Components and Controls................................................................................. 1–1
1.2.1 Front Components................................................................................... 1–1
1.2.2 Operator Control Panel............................................................................ 1–3
1.2.3 Internal Components ............................................................................... 1–4
1.2.4 Rear Components.................................................................................... 1–4
1.3 Specifications.................................................................................................... 1–5
2 Installation
2.1 General............................................................................................................. 2–1
2.2 Site Preparation................................................................................................. 2–1
2.3 Unpacking the Shipment................................................................................... 2–2
2.4 Installing the 2T-CCMHA-CB Central Office Memory Channel Hub................ 2–4
2.4.1 Determining the Installation Area............................................................ 2–4
2.4.2 Attaching the Slide Assemblies to the Cabinet Rails................................ 2–6
2.4.2.1 Attaching the Right Slide Assembly to the Cabinet Rails............... 2–6
2.4.2.2 Attaching the Left Slide Assembly to the Cabinet Rails................. 2–7
2.4.3 Attaching the Inner Races to the Tray .....................................................2–9
2.4.4 Mounting the Memory Channel Hub, Front Bezel, and Interlock Actuator
Bracket on the Tray ..................................................................................... 2–10
2.4.5 Mounting the Chassis and Tray Assembly on the Slides........................ 2–12
2.5 Installing the Interlock System.......................................................................2–14

iv
3 Removal and Replacement
3.1 Introduction...................................................................................................... 3–1
3.2 Top Cover......................................................................................................... 3–3
3.3 Power Supply.................................................................................................... 3–4
Figures
Figure 1-1 Front Components................................................................................. 1–2
Figure 1-2 Operator Control Panel.......................................................................... 1–3
Figure 1-3 Rear Components.................................................................................. 1–4
Figure 2-1 Installation Area and Rail-Hole Pattern (EIA Rail-Hole Pattern) ........... 2–5
Figure 2-2 Attaching the Slide Assemblies to the Cabinet Rails.............................. 2–7
Figure 2-3 Attaching the Inner Slide Races............................................................. 2–9
Figure 2-4 Mounting the Memory Channel Hub, Front Bezel, and Interlock Actuator
Bracket on the Tray.............................................................................................2–11
Figure 2-5 Mounting the Chassis and Tray Assembly on the Slides .......................2–13
Figure 2-6 The Interlock System............................................................................2–16
Figure 3-1 Removing and Replacing the Top Cover ............................................... 3–3
Figure 3-2 Removing the Power Supply.................................................................. 3–4
Figure 3-3 Disconnecting the Power Cable Connector and Removing the Power
Supply.................................................................................................................. 3–5
Tables
Table 1-1 2T-CCMHA-CB Central Office Memory Channel Hub Specifications... 1–5
Table 2-1 Mounting Hardware and Component List ............................................... 2–3

v
Preface
Overview
This guide provides the information necessary to install the 2T-CCMHA-CB central office
Memory Channel hub in a 48.26-cm (19-in.) NEBS 2000/ETSI-compliant cabinet with an
EIA rail-hole pattern. It also provides information on removing and replacing the top cover
and the power supply.
Intended Audience
This guide is intended for Compaq service personnel or qualified Self-maintenance
customers who are familiar with installing computer systems, and for system managers and
others who perform system management tasks.
How to Use This Guide
Read this guide before installing the 2T-CCMHA-CB central office Memory Channel hub.
Before installation review the warranty. The terms of the warranty agreement with
Compaq may require that a qualified Compaq Customer Services representative install the
system. Contact your local Compaq representative if you have any questions.
Organization
This guide is organized as follows:
Chapter 1, Introduction – Provides an overview of the 2T-CCMHA-CB central office
Memory Channel hub and a description of the basic components and controls.
Chapter 2, Installation – Provides site preparation, unpacking, and system installation
information.

vi
Chapter 3,.Removal and Replacement – Provides the removal and replacement
procedures for the top cover and power supply.
Related Documents
Other documents related to the 2T-CCMHA-CB central office Memory Channel hub
include the following:
• Memory Channel User’s Guide (EK-PCIRM-UG)
• Memory Channel Service Information (EK-PCIRM-SV)
Conventions
This guide uses the following conventions:
Convention Meaning
Note A note calls the reader’s attention to any item of information that may be of
special importance.
Caution A caution contains information essential to avoid damage to the equipment.
Warning A warning contains information essential to the safety of personnel.


Circled numbers provide a link between figures or examples and text.
Italic type Italic type emphasizes important information, indicates variables, and
indicates complete titles of manuals.
Reader’s Comments
Compaq welcomes your comments on this or any other manual. You can send your
comments to Compaq in the following ways:
• Internet electronic mail: [email protected]
• Mail:
Compaq Computer Corporation
Information Design
PKO3-2/21J
129 Parker Street
Maynard, MA 01754-2199
For additional information call 1-800-344-4825.

DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 1–1
1
Introduction
1.1 Overview
The 2T-CCMHA-CB central office Memory Channel hub is used to share and route data
between two AlphaServer 4100 central office systems.
1.2 Components and Controls
System components and controls are located at the front, internally, and at the rear of the
Memory Channel hub chassis.
1.2.1 Front Components
Figure 1-1 shows the components located on the front of the Memory Channel hub chassis.

Introduction
1–2 DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
Figure 1-1 Front Components
DIGITAL
Memory Channel Hub 100/8
Central Office
1
LJ-06497.AI7
 Operator control panel

Introduction
DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 1–3
1.2.2 Operator Control Panel
The operator control panel (OCP), shown in Figure 1-2, is located on the front of the
Memory Channel hub chassis and consists of an On/Off switch, a Reset button, and three
LEDs.
Figure 1-2 Operator Control Panel
LJ-06498.AI7
3 4 5
2 1
DIGITAL Memory Channel Hub 100/8
Central Office

On/Off switch — Powers the system secondary dc power on or off.

Reset button — Initializes the system.

Turbo LED — Lit when computer runs at rated microprocessor speed. Not lit when in
non-turbo mode.

Disk LED — Indicates disk drive activity.

Power LED — Lit when power switch is On.

Introduction
1–4 DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
1.2.3 Internal Components
The internal components of the Memory Channel hub chassis consist of the following:
• One motherboard
• Four to eight CCMLA hub linecards
• Cooling fan
1.2.4 Rear Components
Figure 1-3 shows the components located on the rear of the Memory Channel hub chassis.
Figure 1-3 Rear Components
LJ-06499.AI7
1 2 3
12345670

Power supply

-48 Vdc power receptacle

CCMLA linecard slots

Introduction
DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 1–5
1.3 Specifications
Table 1-1 contains the physical, environmental, and electrical specifications for the 2T-
CCMHA-CB central office Memory Channel hub.
Table 1-1 2T-CCMHA-CB Central Office Memory Channel Hub Specifications
Physical Characteristics
Chassis
Weight 13.6 kg (30 lb.)
Length 40.64 cm (16 in.)
Width 48.26 cm (19.0 in.)
Height 17.78 cm (7.00 in.)
Environmental Requirements
Temperature range
Operating 0°C to 40°C (32°F to 104°F)
Non-Operating -20°C to 95°C (-4°F to 203°F)
Temperature change rate 11°C/hr (20°F/hr) maximum
Wet bulb temperature
(maximum) 28°C (82°F)
Dew point temperature
(minimum) 2°C (36°F)
Relative humidity 10% to 95% (noncondensing)
Altitude 60 m to 3050 m (-200 ft to 10,000 ft)
Electrical Requirements
Nominal voltage -48 Vdc
Operational voltage range -36 to -72 Vdc
Input current (maximum) 1.25 A at -48 Vdc
Input power 60 W

SES Template Word 7 Blank Page Fix by Peter LaQuerre

DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 2–1
2
Installation
2.1 General
This chapter covers the installation of the 2T-CCMHA-CB central office Memory Channel
hub in a 48.26-cm (19-in.) NEBS 2000/ETSI-compliant cabinet with an EIA rail-hole
pattern. The major topics covered in this chapter include:
• Site Preparation
• Unpacking the Shipment
• Installing the 2T-CCMHA-CB central office Memory Channel Hub
– Determining the Installation Area
– Attaching the Slide Assemblies to the Cabinet Rails
– Attaching the Inner Races to the Tray
– Mounting the Chassis and Front Bezel to the Tray
• Installing the Interlock System
For information on configuration and verification, refer to the Memory Channel User’s
Guide.
2.2 Site Preparation
The installation instructions that follow assume that:
• All cables that you plan to connect to the 2T-CCMHA-CB central office Memory
Channel hub are in place and clearly labeled. These cables are the BC12N cables from
the CCMAA adapters installed in the AlphaServer systems.
• The specifications and conditions listed in Section 1.3 have been met.

Installation
2–2 DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
• The system is located in an area that provides sufficient clearance for ventilation and
servicing. A clearance of 61 cm (24 in.) at the rear and 129.6 cm (51 in.) at the front
of the cabinet is required for service.
________________________ Caution___________________________
Do not impede airflow by obstructing the front and rear of the cabinet.
Exceeding internal thermal limits can affect system reliability.
___________________________________________________________
_______________________ WARNING__________________________
The 2T-CCMHA-CB central office Memory Channel hub can weigh up to
13.6 kg (30 lb.). To prevent personal injury and equipment damage, ensure
that the system is contained in an enclosure that can be stabilized when the
system is pulled out on its slides.
___________________________________________________________
_______________________ ACHTUNG__________________________
Der 2T-CCMHA-CB Central Office Memory Channel Hub kann bis zu 13,6
kg (30 lb) wiegen. Um Personen- und Geräteschaden zu vermeiden, sollten
Sie deshalb sicherstellen, daß sich das System in einem Gehäuse befindet,
das stabilisiert werden kann, wenn das System an den Schienen
herausgezogen wird.
___________________________________________________________
2.3 Unpacking the Shipment
The 2T-CCMHA-CB central office Memory Channel hub shipment may include several
cartons. Check the packing list to ensure that all items listed have been received.
If the equipment is damaged or if any items are missing, notify the delivery agent and
contact the Compaq sales representative.
Save all shipping cartons in case the equipment needs to be moved to a new location, or
needs to be returned for repair.

Installation
DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 2–3
________________________WARNING __________________________
The 2T-CCMHA-CB central office Memory Channel hub can weigh up to
13.6 kg (30 lb.). Use sufficient personnel or the proper lifting equipment
when lifting or moving the system.
____________________________________________________________
________________________ACHTUNG __________________________
Der 2T-CCMHA-CB Central Office Memory Channel Hub kann bis zu 13,6
kg (30 lb) wiegen. Beim Hochheben oder Transport des Systems sollten
deshalb genügend Hilfskräfte vorhanden sein oder die richtigen
Hebewerkzeuge benutzt werden.
____________________________________________________________
Table 2-1 lists the mounting hardware and components included with the 2T-CCMHA-CB
central office Memory Channel hub shipment for installation in a 48.26-cm (19-in.) NEBS
2000/ETSI-compliant cabinet with an EIA rail-hole pattern.
Table 2-1 Mounting Hardware and Component List
Description Part Number Quantity
Chassis slide assembly 12-46387-01 1 pair
Tray 74- 53806-01 1
Front bezel (gray) or 74-53812-02 1
Front bezel (blue) 74-53812-01 1
Interlock actuator bracket 74-53819-01 1
Stabilizer bracket 74-53822-02 1
Actuator latch 74-48997-03 1
Screw, 10-32 truss-head 90-00063-37 2
Set screw, 6-32 90-06291-10 2
Screw, 8-32 pan-head 90-09545-00 6
Screw, 10-32 truss-head 90-00063-39 23
Standoff, 10-32 90-11510-01 4
Kepnut, 8-32 90-06563-00 6
Flat washer, 8-32 90-06661-00 5
Tie-wraps 90-07031-01 10
DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub
Installation/Service Guide EK-MCHCO-IN 1

Installation
2–4 DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
2.4 Installing the 2T-CCMHA-CB Central Office Memory
Channel Hub
The following sections contain the procedure for installing the 2T-CCMHA-CB central
office Memory Channel hub in a 48.26-cm (19-in.) NEBS 2000/ETSI-compliant cabinet
with an EIA rail-hole pattern.
Tools Required
• Phillips-head screwdriver
• Flat-blade screwdriver
• Adjustable wrench
2.4.1 Determining the Installation Area
The 2T-CCMHA-CB central office Memory Channel hub requires 22.23 cm (8.75 in.) of
vertical space or 15 contiguous holes in a 48.26-cm (19-in.) NEBS 2000/ETSI-compliant
cabinet with an EIA rail-hole pattern.
The holes in the EIA rail-hole pattern cabinet rails follow a pattern of 1.27 cm (0.50 in.),
1.59 cm (0.625 in.), and 1.59 cm (0.625 in.). This pattern is called a set and is repeated for
the length of the cabinet rails.
To determine the installation area, perform the following steps at the front and the rear
cabinet rails (refer to Figure 2-1).
1. Select a section of the cabinet rail where there is a 1.27 cm (0.05 in.) space between
two holes and make a mark between these two holes. This is thestarting point of the
installation area.
2. Count up or down 15 holes from the starting point and make a mark above or below
the 15th hole. The area between these two marks is the installation area. The bottom
hole of the installation area is identified as hole 1 of the installation area.
3. Repeat steps 1 and 2 for the same holes on the front of both front rails and the rear of
both rear rails.
The total installation area for the 2T-CCMHA-CB central office Memory Channel hub is
or 22.23 cm (8.75 in.) of vertical space.

Installation
DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 2–5
Figure 2-1 Installation Area and Rail-Hole Pattern (EIA Rail-Hole Pattern)
"1.75 Rule"
"Installation Area"
LJ-06500.AI4
1 3/4"
7"
8 3/4"
0.625 inch
0.500 inch
0.625 inch
0.625 inch
0.500 inch
0.625 inch
0.625 inch
0.625 inch
0.625 inch 3 1/2"
5 1/4"
0.500 inch
1
2
3
4
1
2
3
4
 Hole 1 for attaching left and right slide
brackets.
 Hole 3 for attaching left and right slide
brackets.
 Hole 2 for installing standoffs on left
and right front rails.
 Hole 14 for installing standoffs and nuts on
left and right front rails.

Installation
2–6 DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
2.4.2 Attaching the Slide Assemblies to the Cabinet Rails
The following sections contain the procedures for attaching the right and left slide
assembles to the cabinet rails.
2.4.2.1 Attaching the Right Slide Assembly to the Cabinet Rails
To attach the right slide assembly to the cabinet rails, refer to Figure 2-2 and proceed as
follows:
1. Determine the proper mounting holes for the right slide brackets. The proper mounting
holes are the 1st, 2nd, and 3rd holes of the installation area (see Figure 2-1).
2. Locate the right slide assembly.
3. Place the right front slide bracket on the inside of the right front rail and align the
three slide bracket holes and with the 1st, 2nd, and 3rd holes of the installation area on
the right front rail.
4. Install two 10-32 truss-head screws  in the 1st and 3rd holes of the installation area
to secure the right front slide bracket to the right front rail, but do not tighten.
5. Install a 10-32 standoff  in the 2nd hole of the installation area on the right front rail.
Tighten this standoff.
6. Place the right rear slide bracket on the inside of the right rear rail and align the three
slide bracket holes and with the 1st, 2nd, and 3rd holes of the installation area on the
right rear rail.
7. Install three 10-32 truss-head screws  in the 1st, 2nd, and 3rd, holes of the
installation area to secure the right rear slide bracket to the right rear rail, but do not
tighten.
8. Tighten the two 8-32 screws and nuts that secure the right rear slide bracket to the
right slide assembly.
9. Securely tighten all five 10-32 truss-head screws that secure the right slide assembly
to the right front and rear cabinet rails.
10. Install a 10-32 standoff  in 14th hole of the installation area on the right front rail
and secure it in place with a 10-32 nut.

Installation
DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide 2–7
Figure 2-2 Attaching the Slide Assemblies to the Cabinet Rails
3
4
2
4
2
11
3
LJ-06501.AI7
2.4.2.2 Attaching the Left Slide Assembly to the Cabinet Rails
To attach the left slide assembly to the cabinet rails, refer to Figure 2-2 and proceed as
follows:
1. Determine the proper mounting holes for the left slide brackets. The proper mounting
holes are the 1st, 2nd, and 3rd holes of the installation area (see Figure 2-1).
2. Locate the left slide assembly.
3. Place the left front slide bracket on the inside of the left front rail and align the three
slide bracket holes and with the 1st, 2nd, and 3rd holes of the installation area on the
left front rail.
4. Install two 10-32 truss-head screws  in the 1st and 3rd holes of the installation area
to secure the left front slide bracket to the left front rail, but do not tighten.

Installation
2–8 DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
5. Install a 10-32 standoff  in the 2nd hole of the installation area on the left front rail.
Tighten this standoff.
6. Place the left rear slide bracket on the inside of the left rear rail and align the three
slide bracket holes and with the 1st, 2nd, and 3rd holes of the installation area on the
left rear rail.
7. Install three 10-32 truss-head screws  in the 1st, 2nd, and 3rd, holes of the
installation area to secure the left rear slide bracket to the left rear rail, but do not
tighten.
8. Tighten the two 8-32 screws and nuts that secure the left rear slide bracket to the left
slide assembly.
9. Securely tighten all five 10-32 truss-head screws that secure the left slide assembly to
the left front and rear cabinet rails.
10. Install a 10-32 standoff  in 14th hole of the installation area on the left front rail and
secure it in place with a 10-32 nut.