IBM RS/6000 7025 F50 Service Manual

RS/6000 7025 F50 Series IBM
Service Guide
SA38-0541-01
Second Edition (February 1998)
The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: THIS PUBLICATION IS PROVIDED “AS
IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. The manufacturer may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time, without notice.
It is possible that this publication may contain reference to, or information about, products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that these products, programming, or services will be announced in your country. Any reference to a specific licensed program in this publication is not intended to state or imply that you can use only that licensed program. You can use any functionally equivalent program instead.
Requests for technical information about products should be made to your authorized reseller or marketing representative.
International Business Machines Corporation 1997, 1998. All rights reserved.
Note to U.S. Government Users -- Documentation related to restricted rights -- Use, duplication or disclosure is subject to restrictions set forth is GSA ADP Schedule Contract with IBM Corp.
Contents
Communications Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Federal Communications Commission (FCC) Statement .............. vii
International Electrotechnical Commission (IEC) Statement ............ vii
United Kingdom Telecommunications Safety Requirements ............ vii
European Union (EU) Statement ............................ viii
Avis de conformité aux normes du ministère des Communications du Canada . viii
Canadian Department of Communications Compliance Statement ........ viii
VCCI Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Radio Protection for Germany ............................. ix
European Union (EU) Statement ............................. x
VCCI Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Safety Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Electrical Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Laser Safety Information ................................ xiii
About This Book .................................... xv
ISO 9000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Chapter 1. Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Unit Locations .................................. 1-1
System Data Flow .................................... 1-8
Typical Boot Sequence for RS/6000 7025 F50 Series ............... 1-9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Service Inspection Guide ............................... 1-13
Chapter 2. Maintenance Analysis Procedures (MAPs) ............. 2-1
Entry MAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
MAP 1020: Problem Determination .......................... 2-6
MAP 1520: Power ................................... 2-12
MAP 1540: Minimum Configuration ......................... 2-17
SSA Maintenance Analysis Procedures (MAPs) .................. 2-35
MAP 2010: SSA Hot-Swap Disk Drive–Start .................... 2-37
Chapter 3. Error Code to FRU Index ........................ 3-1
Firmware/POST Error Codes .............................. 3-2
Bus SRN to FRU Reference Table .......................... 3-27
Checkpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
Location Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
Preface iii
Physical Location Codes ............................... 3-46
AIX and Physical Location Code Reference Table ................. 3-48
AIX Location Codes .................................. 3-54
SSA Location Code Format .............................. 3-58
SSA Loops and Links ................................. 3-59
SSA Service Aids .................................... 3-64
Service Aid Error Codes ................................ 3-83
Using the Service Aids for SSA-Link Problem Determination ........... 3-84
Finding the Physical Location of a Device ..................... 3-90
Microcode Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-92
Vital Product Data (VPD) ............................... 3-93
Chapter 4. Loading the System Diagnostics ................... 4-1
Chapter 5. System Management Services ..................... 5-1
Graphical System Management Services ....................... 5-1
Config . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
MultiBoot: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
RIPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
SCSI ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Text-Based System Management Services ..................... 5-24
Chapter 6. Removal and Replacement Procedures ............... 6-1
Handling Static–Sensitive Devices ........................... 6-2
Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
CD-ROM Drive, Tape Drive, Diskette Drive ..................... 6-19
Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Memory Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26
Memory Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
I/O Planar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
Processor Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
Service Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38
Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-42
Operator Panel Display ................................ 6-44
Operator Panel Control Assembly .......................... 6-45
Serial/Parallel Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46
iv Service Guide
Chapter 7. Parts Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
Appendix A. SSA Problem Determination Procedures ............ A-1
Disk Drive Module Power-On Self-Tests (POSTs) ................. A-1
Adapter Power-On Self-Tests (POSTs) ....................... A-2
Service Request Numbers (SRNs) .......................... A-3
SSA Loop Configurations That Are Not Valid .................... A-15
Appendix B. Service Processor Menus ..................... B-1
Service Processor Menus ............................... B-3
General User Menus .................................. B-4
Privileged User Menus ................................. B-6
Service Processor Functions and Features ..................... B-24
Appendix C. Service Processor Setup and Test ................ C-1
Testing the Setup .................................... C-2
Appendix D. Modem Configurations . . . . . . . . . . . . . . . . . . . . . . . D-1
Sample Modem Configuration Files ......................... D-1
Configuration File Selection .............................. D-2
Seamless Transfer of a Modem Session ...................... D-6
Modem Configuration Samples ............................ D-9
Appendix E. Service Processor Operational Phases ............. E-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-1
Reader's Comments — We'd Like to Hear From You ............. X-3
Preface v
vi Service Guide
Communications Statements
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the 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. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Properly shielded and grounded cables and connectors must be used in order to meet FCC emission limits. Neither the provider nor the manufacturer are responsible for any radio or television interference caused by using other than recommended cables and connectors or by unauthorized changes or modifications to this equipment. Unauthorized changes or modifications could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference,and (2) this device must accept any interference received, including interference that may cause undesired operation.
International Electrotechnical Commission (IEC) Statement
This product has been designed and built to comply with IEC Standard 950.
United Kingdom Telecommunications Safety Requirements
This equipment is manufactured to the International Safety Standard EN60950 and as such is approved in the UK under the General Approval Number NS/G/1234/J/100003 for indirect connection to the public telecommunication network.
The network adapter interfaces housed within this equipment are approved separately, each one having its own independent approval number. These interface adapters, supplied by the manufacturer, do not use or contain excessive voltages. An excessive voltage is one which exceeds 70.7 V peak ac or 120 V dc. They interface with this equipment using Safe Extra Low Voltages only. In order to maintain the separate (independent) approval of the manufacturer's adapters, it is essential that
Preface vii
other optional cards, not supplied by the manufacturer, do not use main voltages or any other excessive voltages. Seek advice from a competent engineer before installing other adapters not supplied by the manufacturer.
European Union (EU) Statement
This product is in conformity with the protection requirements of EU Council Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility.
Neither the provider nor the manufacturer can accept responsibility for any failure to satisfy the protection requirements resulting from a non–recommended modification of the product, including the fitting of option cards not supplied by the manufacturer.
This product has been tested and found to comply with the limits for Class B Information Technology Equipment according to CISPR 22 / European Standard EN
55022. The limits for Class B equipment were derived for typical residential environments to provide reasonable protection against interference with licensed communication devices.
Avis de conformité aux normes du ministère des Communications du Canada
Cet appareil numérique de la classe A respecte toutes les exigences du Réglement sur le matériel brouilleur du Canada.
Canadian Department of Communications Compliance Statement
This Class A digital apparatus meets the requirements of the Canadian Interference–Causing Equipment Regulations.
VCCI Statement
The following is a summary of the VCCI Japanese statement in the box above.
viii Service Guide
This is a Class B product based on the standard of the Voluntary Control Council for Interference from Information Technology Equipment (VCCI). If this is used near a radio or television receiver in a domestic environment, it may cause radio interference. Install and use the equipment according to the instruction manual.
When used near a radio or TV receiver, it may become the cause of radio interference.
Read the instructions for correct handling.
Radio Protection for Germany
Dieses Gerät ist berechtigt in Übereinstimmung mit dem deutschen EMVG vom
9.Nov.92 das EG–Konformitätszeichen zu führen. Der Aussteller der Konformitätserklärung ist die IBM Germany. Dieses Gerät erfüllt die Bedingungen der EN 55022 Klasse B.
Preface ix
Note: If any of the following Feature Codes are installed:
3615, 4356, 4357, 4358, 4359, 6218, 8130, or 8134, or if a configuration using more than one SysKonnect FDDI adapter (Feature Codes 2741, 2742, or 2743) where any one of them is Feature Code 2743 (SysKonnect SK-NET FDDI-UP SAS PCI), the following statement applies:
European Union (EU) Statement
This product is in conformity with the protection requirements of EU Council Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility. The manufacturer cannot accept responsibility for any failure to satisfy the protection requirements resulting from a non-recommended modification of the product, including the fitting of option cards supplied by third parties. Consult with your dealer or sales representative for details on your specific hardware.
This product has been tested and found to comply with the limits for Class A Information Technology Equipment according to CISPR 22 / European Standard EN
55022. The limits for Class A equipment were derived for commercial and industrial environments to provide reasonable protection against interference with licensed communication equipment.
Attention: This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.
VCCI Statement
The following is a summary of the VCCI Japanese statement in the box above. This is a Class A product based on the standard of the Voluntary Control Council for
Interference by Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.
x Service Guide
Safety Notices
A
danger
death or serious personal injury.
notice indicates the presence of a hazard that has the potential of causing
caution
A moderate or minor personal injury.
Electrical Safety
Observe the following safety instructions any time you are connecting or disconnecting devices attached to the workstation.
DANGER
notice indicates the presence of a hazard that has the potential of causing
An electrical outlet that is not correctly wired could place hazardous voltage on metal parts of the system or the devices that attach to the system. It is the responsibility of the customer to ensure that the outlet is correctly wired and grounded to prevent an electrical shock.
Before installing or removing signal cables, ensure that the power cables for the system unit and all attached devices are unplugged.
When adding or removing any additional devices to or from the system, ensure that the power cables for those devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
Use one hand, when possible, to connect or disconnect signal cables to prevent a possible shock from touching two surfaces with different electrical potentials.
During an electrical storm, do not connect cables for display stations, printers, telephones, or station protectors for communication lines.
CAUTION: This product is equipped with a three–wire power cable and plug for the user's safety. Use this power cable with a properly grounded electrical outlet to avoid electrical shock.
Preface xi
DANGER
To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system.
xii Service Guide
Laser Safety Information
The optical drive in this system unit is a laser product. The optical drive has a label that identifies its classification. The label, located on the drive, is shown below.
CLASS 1 LASER PRODUCT LASER KLASSE 1 LUOKAN 1 LASERLAITE APPAREIL A LASERDE CLASSE1
IEC 825:1984 CENELEC EN 60 825:1991
The optical drive in this system unit is certified in the U.S. to conform to the requirements of the Department of Health and Human Services 21 Code of Federal Regulations (DHHS 21 CFR) Subchapter J for Class 1 laser products. Elsewhere, the drive is certified to conform to the requirements of the International Electrotechnical Commission (IEC) 825 (1st edition 1984) and CENELEC EN 60 825:1991 for Class 1 laser products.
CAUTION: A class 3 laser is contained in the device. Do not attempt to operate the drive while it is disassembled. Do not attempt to open the covers of the drive as it is not serviceable and is to be replaced as a unit.
Class 1 laser products are not considered to be hazardous. The optical drive contains internally a Class 3B gallium-arsenide laser that is nominally 30 milliwatts at 830 nanometers. The design incorporates a combination of enclosures, electronics, and redundant interlocks such that there is no exposure to laser radiation above a Class 1 level during normal operation, user maintenance, or servicing conditions.
Preface xiii
xiv Service Guide
About This Book
This book provides maintenance information that is specific to the system unit, adapters, and attached devices that do not have their own service information. It also contains Maintenance Analysis Procedures (MAPs) that are not common to other systems.
MAPs that are common to all systems are contained in the
Information for Multiple Bus Systems
This book is used by the service technician to repair system failures. This book assumes that the service technician has had training on the system unit.
ISO 9000
ISO 9000 registered quality systems were used in the development and manufacturing of this product.
Related Publications
The following publications are available for purchase:
The
The
The
IBM RS/6000 7025 F50 Series User's Guide
users set up, install options, configure, modify, and solve minor problems.
IBM RS/6000 Diagnostic Information for Multiple Bus Systems
common diagnostic procedures, error codes, service request numbers, and failing function codes. This manual is intended for trained service technicians.
IBM RS/6000 Adapter, Device, and Cable Information for Multiple Bus
Systems
manual is intended to supplement information found in the
contains information about adapters, external devices, and cabling. This
Diagnostic Information for Multiple Bus Systems
.
.
IBM RS/6000 Diagnostic
contains information to help
contains
IBM RS/6000
The
Preface xv
Site and Hardware Planning Information
plan your installation.
contains information to help you
xvi Service Guide
Chapter 1. Reference Information
System Unit Locations
Front View with Media Door Off
Chapter 1. Reference Information 1-1
Rear View
1-2 Service Guide
SCSI IDs and Bay Locations
Note: The SCSI bus ID's in Bays A1, B1 and B2 are the recommended values.
Features installed at the manufacturing site correspond to these IDs. Field installations may not comply with these recommendations.
Chapter 1. Reference Information 1-3
I/O Planar Locations
J1, J2 64-bit PCI connectors J3, J4, J5, J6, J7, J8P, J9P 32-bit PCI connectors J8I, J9I ISA connectors J10 Service Processor J11 External SCSI connector J12 Fan #1 (Bottom Fan) J13 Diskette Drive connector J15 Fan #3 J16 SCSI Security Jumper J17 Fan #2 J18 Ethernet connector (thick)
1-4
Service Guide
J19 Fan #4 (Top Fan) J21 Ethernet connector (twisted pair) J22A Operator Panel J23 Keyboard connector J25 Internal SCSI connector (port 1) J26 System Card connector J27 Mouse connector J30 Internal SCSI connector (port 2) J41 Serial connector (serial port 1 and 2) J43 Battery Socket J47 Parallel connector J50 Serial connector (serial port 3) P1, P2 Power Supply
Chapter 1. Reference Information 1-5
System Card Locations
J5, J6 Processor card connector #2 J8, J9 Processor card connector #1 J12 Memory card connector #1 J13 Memory card connector #2
Memory Card Locations
1-6 Service Guide
Operator Panel
Chapter 1. Reference Information 1-7
System Data Flow
1-8 Service Guide
Typical Boot Sequence for RS/6000 7025 F50 Series
After the A/C power is turned on, the System Support Controller (SSC) startup begins, and releases reset to the Service Processor. If the SSC cannot communicate with the Service Processor, the LCD displays 4BA00000. If the Service Processor is not present, the LCD displays 4BA00001.
1. Service Processor Self Test
Service Processor card performs self test and NVRAM initialization.LCD Code range is E000 - E07F.LCD code is "OK" when complete.
2. Service Processor in Standby Mode You can enter the Service Processor menus whenever the LCD code is
"OK", "STBY", or has an eight digit error code on the LCD display by pressing the enter key on an ASCII terminal connected to serial port 1.
3. Built-In-Self-Test (BIST) The Service Processor initiates Built-In-Self-Test (BIST) on the Central
Electronics Complex (CEC) chips when the POWER Button is pressed.
The VPD data is read and the CRC is checked.The CPU compatibility test is run.LCD Code range is E0A0 - E0E1.
4. System Initialization System firmware begins to execute and initializes system registers after LCD
code E0E1.
LCD Code range is E1XX - E2XX.
5. Memory Test The system firmware tests the system memory and identifies failing memory
cards and memory module locations.
LCD Code range is E3XX.
6. Device Configuration and Test System firmware checks to see what devices are in the system and performs
a simple test on them.
The system firmware displays the device name or device icon being tested.
After the keyboard name or icon appears, the user can enter the Systems Management Services menu by hitting the "1" key (if ASCII terminal) or the "F1" key (if Graphics terminal).
The user can also enter one of the following:
– "5" or "F5" to start the Stand-alone Diagnostics (CD or Tape). – "6" or "F6" to start the On-line Diagnostics (Hard Disk)
Chapter 1. Reference Information 1-9
7. IPL Boot Code The system firmware attempts to boot from the devices listed in the Boot
List.
LCD Code range is E1XX.
8. Boot Image Execution Once a boot image is located on a device in the Boot List, the system
firmware code hands off control to the AIX Boot code.
– LCD Code E105 for Normal Boot or – E15B for Service Mode Boot.
The AIX Boot code indicates LCD progress codes in the range from 05XX to
09XX.
9. AIX Boot Complete The AIX login prompt appears on the main console.
Specifications
The mechanical packaging, cooling, power supply, and environmental requirements for the server is shown in the following:
Dimensions
Height - 620 mm (24.3 inches) Depth - 695 mm (27.3 inches) Width - 245 mm (9.6 inches)
Weight
Configuration dependent
Operating Environment - Class B
Temperature - 16° to 32°C (60° to 90°F) Humidity - 8% to 80% noncondensing Maximum Altitude - 2135 m (7000 feet)
1-10
Service Guide
Power Source Loading
Typical EMC Configuration - 0.28 kVA Maximum - 0.65 kVA
Power Requirements
Typical - 154 watts Maximum - 450 watts
Power Factor
0.8 - 0.98
Operating Voltage
100 to 127V ac; 50 to 60 Hz 200 to 240V ac; 50 to 60 Hz
Heat Output (Maximum)
Typical - 800 BTU/hr Maximum - 2300 BTU/hr
Acoustics
6.0 Bels operating
5.5 Bels idle
Chapter 1. Reference Information 1-11
Power Cables
To avoid electrical shock, a power cable with a grounded attachment plug is provided. Use only properly grounded outlets.
Power cables used in the United States and Canada are listed by Underwriter's Laboratories (UL) and certified by the Canadian Standards Association (CSA). These power cords consist of:
Electrical cables, Type SVT or SJT.Attachment plugs complying with National Electrical Manufacturers Association
(NEMA) 5-15P. That is:
"For 115 V operation, use a UL listed cable set consisting of a minimum 18 AWG, Type SVT or SJT three-conductor cord a maximum of 15 feet in length and a parallel blade, grounding type attachment plug rated at 15 A, 125 V."
"For 230 V operation in the United States use a UL listed cable set consisting of a minimum 18 AWG, Type SVT or SJT three-conductor cable a maximum of 15 feet in length, and a tandem blade, grounding type attachment plug rated at 15 A, 250 V."
Appliance couplers complying with International Electrotechnical Commission
(IEC) Standard 320, Sheet C13.
Power cables used in other countries consist of the following:
Electrical cables, Type HD21.Attachment plugs approved by the appropriate testing organization for the
specific countries where they are used.
"For units set at 230 V (outside of U.S.): use a cable set consisting of a minimum 18 AWG cable and grounding type attachment plug rated 15 A, 250 V. The cable set should have the appropriate safety approvals for the country in which the equipment will be installed and should be marked HAR'."
Refer to Chapter 7, “ Parts Information” on page 7-1 to find the power cables that are available.
1-12
Service Guide
Service Inspection Guide
Perform a service inspection on the system when:
The system is inspected for a maintenance agreement.Service is requested and service has not recently been performed.An alterations and attachments review is performed.Changes have been made to the equipment that may affect the safe operation of
the equipment.
External devices with their own power cables have those cables attached.
If the inspection indicates an unacceptable safety condition, the condition must be corrected before anyone can service the machine.
Note: The correction of any unsafe condition is the responsibility of the owner of the system.
Perform the following checks:
1. Check the covers for sharp edges and for damage or alterations that expose the internal parts of the system unit.
2. Check the covers for proper fit to the system unit. They should be in place and secure.
3. Gently rock the system unit from side to side to determine if it is steady.
4. Set the power switch of the system unit to Off.
5. Remove the covers.
6. Check for alterations or attachments. If there are any, check for obvious safety hazards such as broken wires, sharp edges, or broken insulation.
7. Check the internal cables for damage.
8. Check for dirt, water, and any other contamination within the system unit.
9. Check the voltage label on the back of the system unit to ensure that it matches the voltage at the outlet.
10. Check the external power cable for damage.
11. With the external power cable connected to the system unit, check for 0.1 ohm or less resistance between the ground lug on the external power cable plug and the metal frame.
12. Perform the following checks on each device that has its own power cables:
a. Check for damage to the power cord.
Chapter 1. Reference Information 1-13
b. Check for the correct grounded power cable. c. With the external power cable connected to the device, check for 0.1 ohm or
less resistance between the ground lug on the external power cable the metal frame of the device.
13. Install the covers.
1-14
Service Guide
Loading...
+ 328 hidden pages