Chapter 3

Chapter 4

Chapter 5

Chapter 6 Chapter 7 Chapter 8
ILLUSTRATED PARTS CATALOG contains illustrated part breakdowns, order numbers, and part names for the COMPAQ DESKPRO 386 Personal Computer. REMOVAL AND REPLACEMENT PROCEDURES describes how to remove and replace subassemblies for the COMPAQ DESKPRO 386 Personal Computer. JUMPER SETTINGS AND SWITCH SETTINGS provides detailed information for setting jumpers and switches on the COMPAQ DESKPRO 386 Personal Computer.
REQUIRED TOOLS AND SUPPLIES
To service the COMPAQ DESKPRO 386 Personal Computer, you need: Torx T-10 screwdriver Torx T-15 screwdriver Small Phillips screwdriver COMPAQ Personal Computer ADVANCED DIAGNOSTICS Diskette Version 5.XX (part no. 108137) Formatted scratch diskette(s) 25-pin printer loopback plug (part no. 100755-001) 9-pin serial loopback plug (part no. 102999-001) 80387 coprocessor removal tool (part no. 108492-001) Memory chip insertion tool Memory chip removal tool

Optional tools are:

ADDITIONAL INFORMATION
The following documentation and related software are available to support the COMPAQ DESKPRO 386 Personal Computer. Associated Documentation: COMPAQ DESKPRO 386 PERSONAL COMPUTER OPERATIONS GUIDE COMPAQ DESKPRO 386 TECHNICAL REFERENCE GUIDE VOLUMES I and II MS-DOS/BASIC VERSION 3.1 REFERENCE GUIDE MS-DOS/BASIC VERSION 3.2 REFERENCE GUIDE MS-DOS/BASIC VERSION 3.3 REFERENCE GUIDE Service Advisories Service Bulletins HOW TO DO BUSINESS WITH COMPAQ SERVICE COMPAQ ENHANCED COLOR GRAPHICS BOARD OPERATIONS AND INSTALLATION GUIDE COMPAQ ENHANCED COLOR GRAPHICS BOARD TECHNICAL REFERENCE GUIDE COMPAQ VIDEO GRAPHICS CONTROLLER BOARD TECHNICAL REFERENCE GUIDE COMPAQ SERVICE QUICK REFERENCE GUIDE SY-TOS TAPE OPERATING SYSTEM USERS GUIDE

CONTENTS

Chapter 1 OPERATING AND PERFORMANCE SPECIFICATIONS
1.1 INTRODUCTION 1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT 1.3 COMPAQ ENHANCED KEYBOARD 1.4 COMPAQ 84-KEY KEYBOARD 1.5 COMPAQ DUAL-MODE MONITOR 1.6 COMPAQ COLOR MONITOR 1.7 COMPAQ VIDEO GRAPHICS COLOR MONITOR 1.8 COMPAQ VIDEO GRAPHICS MONOCHROME MONITOR 1.9 360-KBYTE 5-INCH DISKETTE DRIVE 1.10 1.2-MEGABYTE 5-INCH DISKETTE DRIVE 1.11 1.44-MEGABYTE 3-INCH DISKETTE DRIVE 1.12 40-MEGABYTE FIXED DISK DRIVE 1.13 70-MEGABYTE FIXED DISK DRIVE 1.14 130-MEGABYTE FIXED DISK DRIVE 1.15 40-MEGABYTE FIXED DISK DRIVE BACKUP (TAPE) 1.16 135-MEGABYTE FIXED DISK DRIVE BACKUP (TAPE) 1.17 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT 1.18 300-MEGABYTE FIXED DISK DRIVE FOR THE EXPANSION UNIT 1-1 1-2 1-3 1-3 1-4 1-5 1-6 1-8 1-10 1-12 1-12 1-13 1-14 1-15 1-16 1-17 1-18 1-19

Chapter 2 POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION
2.1 2.2 2.3 2.4 INTRODUCTION POWER-ON SELF-TEST (POST) PRELIMINARY STEPS TO PROBLEM ISOLATION PROBLEM ISOLATION FLOWCHART 2-1 2-1 2-2 2-2

Chapter 3 SETUP PROGRAM

3.1 3.2 WHEN TO RUN SETUP HOW TO RUN SETUP 3-1 3-2
Chapter 4 ADVANCED DIAGNOSTICS PROGRAM
4.1 4.2 4.3 4.4 PRELIMINARY STEPS MAIN MENU ADVANCED DIAGNOSTICS PROGRAM TEST SELECTION MENU 4-1 4-2 4-4 4-5
Chapter 5 ERROR MESSAGES AND CODES
5.1 5.2 5.3 5.4 5.5 INTRODUCTION POWER-ON SELF TEST ERROR MESSAGES ADVANCED DIAGNOSTICS ERROR CODES MEMORY ERROR CODES EXTDISK MESSAGES 5-1 5-1 5-4 5-31 5-36
Chapter 6 ILLUSTRATED PARTS CATALOG
6.1 6.2 6.3 6.4 6.5 INTRODUCTION SPARE PARTS LIST, U.S. SPARE PARTS LIST, INTERNATIONAL PARTS LIST 300-/600-MEGABYTE FIXED DISK EXPANSION UNIT PARTS LIST 6-1 6-2 6-9 6-10 6-21
Chapter 7 REMOVAL AND REPLACEMENT PROCEDURES
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 7.14 INTRODUCTION MONITOR KEYBOARD POWER FUSE PRELIMINARY STEPS TO INTERNAL REMOVAL AND REPLACEMENT PROCEDURES SYSTEM UNIT COVER AND INTERNAL CONFIGURATION POWER SUPPLY BATTERY SECURITY LOCK EXPANSION BOARD(S) 80287 COPROCESSOR MEMORY EXPANSION BOARD(S) MEMORY CHIP(S) SPEAKER COMPONENT AND SECURITY LOCK SWITCH 7-1 7-2 7-5 7-6 7-8 7-9 7-12 7-15 7-18 7-19 7-23 7-24 7-26 7-29

7.15 7.16 7.17 7.18 7.19

MASS STORAGE DEVICE(S) SYSTEM BOARD INTEL 387 COPROCESSOR LOST KEY 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT

7-33 7-39 7-45 7-49 7-50

Chapter 8 JUMPER SETTINGS AND SWITCH SETTINGS
8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 8.10 8.11 8.12 8.13 8.14 INTRODUCTION SYSTEM BOARDS 32-BIT SYSTEM MEMORY BOARD.5- TO 2-MEGABYTE 16-BIT MEMORY EXPANSION BOARD 1- TO 2-MEGABYTE AND 4- TO 8-MEGABYTE 32-BIT MEMORY EXPANSION BOARD ESDI FIXED DISK DRIVE CONTROLLER BOARD MULTIPURPOSE FIXED DISK DRIVE CONTROLLER BOARDS FIXED DISK DRIVE CONTROLLER BOARD HOST ADAPTER BOARD COMPAQ ENHANCED COLOR GRAPHICS BOARD VIDEO DISPLAY CONTROLLER BOARD COMPAQ VIDEO GRAPHICS CONTROLLER BOARD ASYNCHRONOUS COMMUNICATIONS/PARALLEL PRINTER BOARD 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT 8-1 8-2 8-6 8-8 8-10 8-12 8-14 8-18 8-20 8-22 8-28 8-31 8-32 8-36
Chapter 9 MASS STORAGE CONFIGURATIONS
9.1 THEORY OF OPERATION 9.2 SYSTEM CONFIGURATION 9.3 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION UNIT 9-1 9-2 9-6

Appendix A INDEX

FIGURES
5-1. Memory Error Locations on the 32-Bit System Memory Board 5-2. Memory Error Locations on the 1- to 2-Megabyte 32-Bit Memory Board 5-3. Memory Error Locations on the 4- to 8-Megabyte 32-Bit Memory Board 6-1. System Unit (Exterior and Battery) 6-2. System Unit (Interior with Memory Options) 6-3. System Unit (Interior with Controller Boards and Mass Storage Options) 6-4. COMPAQ Enhanced Keyboard 6-5. 84-Key Keyboard 6-6. COMPAQ Dual-Mode Monitor Assembly 6-7. COMPAQ Color Monitor 6-8. COMPAQ Video Graphics Color Monitor 6-9. COMPAQ Video Graphics Monochrome Monitor 7-1. COMPAQ Dual Mode Monitor (Installed) 7-2. COMPAQ Color Monitor (Installed) 7-3. COMPAQ Video Graphics Color Monitor (Installed) 7-4. COMPAQ Video Graphics Monochrome Monitor (Installed) 7-5. Removing the Keyboard 7-6. Removing the Fuse Holder 7-7. Replacing the Power Fuse 7-8. Location of the Three Screws on the Back of the System Unit 5-31 5-32 5-33 6-11 6-13 6-15 6-16 6-17 6-18 6-19 6-20 6-21 7-2 7-3 7-3 7-4 7-5 7-6 7-7 7-9

1.14 130-MEGABYTE FIXED DISK DRIVE
Dimensions: Height: Depth: Width: Weight: Drive Type: (used in SETUP program) Number of Data Heads: Number of Cylinders: Average Access Time: Data Transfer Rate: Sectors per track: Interleave:
3.38 in. ( 8.6 cm) 8.00 in. (20.3 cm) 5.87 in. (14.9 cm) (allow 0.375 in. (0.95 cm) for installing rails) 7.5 lb (3.4 kg) 251 or 966 Less than 25 ms 10 megabits per second 17 (Type 25)/34 (Type 35) 1:12 or 3:13
MS-DOS 3.1 or earlier supports drive type 25 only. Use drive type 25 if the application software supports only 17 sectors per track. 2 When used with ESDI Fixed Disk Drive Controller Board assy. no. WD1007AWAH. 3 When used with ESDI Fixed Disk Drive Controller Board assy. no. WD1005WAH.
1.15 40-MEGABYTE FIXED DISK DRIVE BACKUP
Dimensions: Height: Depth: Width: Weight: Media: 1.62 in. ( 4.1 cm) 8.00 in. (20.3 cm) 5.75 in. (14.6 cm) (allow 0.375 in. (0.95 cm) for installing rails) 1.7 lb (0.77 kg) DC 2000 streaming cartridge (manufactured by the 3M Corporation) or equivalent DC 1000 read-only streaming cartridge (manufactured by the 3M Corporation) or equivalent 50 in. per second 70 in. per second 49 seconds 35 seconds 83 TPI 16 1024
Tape Speed: Read/write: Rewind/fast forward: Tape End-to-End Positioning Time: Read/write: Forward/reverse: Track Density: Number of Tracks: Blocks/Track: Data Sectors/Block: Bytes/Sector:
1.16 135-MEGABYTE FIXED DISK DRIVE BACKUP (TAPE)
Dimensions: Height: Depth: Width: Weight: Media: Tape Speed: Read/write: Rewind/fast forward: Tape End-to-End Positioning Time: Read/write: Forward/reverse: Track Density: Number of Tracks: Bytes/Blocks: ECC Percentage: 1.62 in. ( 4.1 cm) 8.50 in. (21.6 cm) 5.75 in. (14.6 cm) (allow 0.375 in (0.95 cm) for installing rails) 2.4 lb (1.1 kg) DC 600XTD streaming cartridge (manufactured by the 3M Corporation) or equivalent 72 in. per second 90 in. per second 100 seconds 80 seconds 76 TPI 6.67
1.17 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT
Dimensions: Height: Depth: Width: Weight: One Drive, 300-Megabyte unit: Two Drives, 300-Megabyte units, mirrored: Environmental Requirements: Temperature Operating: Nonoperating: Shipping (adequately packed): Humidity: Operating: Nonoperating: Controller: Interface Board: LED Indicator: Power Requirements: Nominal Line Voltage: Range, Line Voltage: Range, Line Frequency: Power: Steady State: Peak Power: Current: (fuse rating) Power Cable: Length: Type: Interface: Signal Cable: Length: Type: Connectors: 6.4 in. (16.1 cm) 16.5 in. (41.9 cm) 14.5 in. (35.9 cm) 27.5 lb (12.4 kg) 35.5 lb (15.9 kg) Not less than 50F or more than 104F (10C to 40C) Not less than 50F or more than 104F (10C to 40C) Not less than - 22F or more than 140F (- 30C to 60C) Not less than 20% or more than 80% (noncondensing) Not less than 5% or more than 90% (noncondensing) 1:1 interleave Buffered ESDI External Fixed Disk Drive Controller Board installs in one 8-/16-bit expansion slot in the system unit. Internal ESDI interface board supports one or two 300-Megabyte Fixed Disk Drives. Green U.S. International 120 VAC, 60 Hz 230 VAC, 50 Hz 102 to 132 VAC 204 to 264 VAC 47 to 63 Hz 47 to 63 Hz 192 watts 220 watts 5A (U.S.) 60 in (1.52 m) 44-Lead twisted pair 44-Pin Subminiature D-Shell 60 in (1.52 m) 44-Lead twisted pair 44-Pin Subminiature D-Shell

The following steps apply for error codes 517-xx: 1. Replace the lightpen and retest. 2. Replace the video display controller board and retest. 3. Replace the system board and retest.
Error Code 600-xx 601-xx 602-xx 603-xx 604-xx 605-xx 606-xx 607-xx 608-xx 608-xx 609-xx 610-xx 694-00 697-00 698-00 699-00 -xx 03 Exceeded maximum soft error limit. Exceeded maximum hard error limit. Previously exceeded maximum soft error limit. Description Diskette ID drive types test failed. Diskette format failed. Diskette read test failed. Diskette write, read, compare test failed. Diskette random seek test failed. Diskette ID media failed. Diskette speed test failed. Diskette wrap test failed. Diskette write protect test failed. Diskette write protect test failed. Diskette reset controller test failed. Diskette change line test failed. Pin 34 is not cut on 360-Kbyte diskette drive. Diskette type error. Diskette drive speed not within limits. Diskette drive/media ID errorrerun SETUP. Refer to Service Bulletin 25. The following steps apply to error codes 697-xx through 699xx: 1. Replace the diskette and retest. 2. Check the switch settings and jumper positions on the multipurpose xed disk drive controller board and retest (see Chapter 8). 3. Check and/or replace the diskette power and signal cables and retest. 4. Replace the multipurpose xed disk drive controller board and retest. 5. Replace the diskette drive and retest. 6. Replace the system board and retest.
Recommended Action The following steps apply to error codes 600-xx through 610-xx: 1. Replace the diskette and retest. 2. Check the switch settings and jumper positions on the multipurpose xed, disk drive controller board and retest (see Chapter 8). 3. Check and/or replace the diskette drive power and signal cables and retest. 4. Replace the multipurpose xed disk drive controller board and retest. 5. Replace the diskette drive and retest. 6. Replace the system board and retest.

Diskette Drive Test

Error Code -xx 802-01 824-01 Previously exceeded maximum hard error limit. Failed to reset controller. Fatal error while reading. Fatal error while writing. Failed compare of write/read buffers. Failed to format a track. Failed sector wrap test. Failed to get drive type. Failed to get change line status. Failed to clear change line status. Failed to set drive type in ID media. Failed to read diskette media. Failed to verify diskette media. Failed to read media in speed test. Failed speed limits. Failed write protect test. Video memory test failed. Monochrome video text mode test failed. The following steps apply to error codes 802-xx through 824-xx: 1. Replace monitor and retest. 2. Replace monochrome board. 3. Replace system board and retest.

Video Color Graphics (VCG) and Enhanced Color Graphics (ECG) Test The following steps apply to error codes 2402-xx through 2416-xx: 1. Verify the switch settings. 2. Replace the video board and retest. 3. Replace the system board and retest.
Error Code 2409-01 2410-01 2411-01 2412-01 2414-01 2416-01 2417-01 2417-02 2417-03 2417-04 Description Video mode color set 1 test failed. Video mode test failed. Video screen memory page test failed. Video gray scale test failed. Video white screen test failed. Video noise pattern test failed. Lightpen text mode test failedno response. Lightpen text mode test failedinvalid response. Lightpen medium resolution mode test failedno response. Lightpen medium resolution mode test failedinvalid response.
Recommended Action The following steps apply to error codes 2402-xx through 2416-xx: 1. Verify the switch settings. 2. Replace the video board and retest. 3. Replace the system board and retest.
The following steps apply to error codes 2417-xx: 1. Check the switch settings on the video board (see Chapter 8). 2. Replace the lightpen and retest. 3. Replace the video board and retest. 4. Replace the system board and retest.
Error Code 2418-01 2418-02 2419-01 2420-01 2421-01 2422-01 2423-01 2424-01 2425--01 2432-01 Description EGC/VCG memory test failed. EGC/VCG shadow RAM test failed. EGC/VCG ROM checksum test failed. EGC/VCG attribute test failed. EGC/VCG graphics mode test failed. EGC/VCG 16 color set test failed. EGC/VCG 64 color set test failed. EGC/VCG monochrome text mode test failed. EGC/VCG monochrome; graphics mode test failed. VCG or ECG graphics mode test failed. VCG or ECG graphics mode test failed. Recommended Action The following steps apply to error codes 2418-xx through 2432-xx: 1. Verify the switch settings. 2. Replace the video board and retest. 3. Replace the system board and retest.

5.4 MEMORY ERROR CODES

Memory error codes appear when the system detects a memory fault during the Power-On Self-Test (201 or 203 error codes) or as a result of a diagnostic test (203 error codes). The TEST programs attempt to isolate the memory fault to a specic location, then generate a memory error code that identies the defective system memory board or system memory module to be replaced. The memory error code points to a specic memory address. The physical location of the memory address depends on the number and type of memory boards installed and the type of memory device used.
The rst one megabyte of RAM in the system is mapped into various areas of the system memory map. The common conguration is that the rst 640 Kbytes are the base memory. The next 256 Kbytes are used by the COMPAQ Expanded Memory Management (CEMM) Program. The last 128 Kbytes are reserved for system use. The base memory size is congured on the system memory board to 256 Kbytes, 512 Kbytes, or 640 Kbytes. When the base memory size is reduced, the RAM normally assigned to the base memory is mapped into the extended memory space.

EXTDISK Already Processed in CONFIG.SYS EXTDISK Installed EXTDISK Not Installed
Incorrect DOS Version Secondary Controller Board Error Timeout on Disk x, Secondary Controller
EXTDISK runs only under MS-DOS 3.3x. An error occurred on the secondary controller board. The EXTDISK.SYS device cannot detect a xed disk drive on the secondary controller board.
Chapter 6 ILLUSTRATED PARTS CATALOG 6.1 6.2 6.3 6.4 6.5 INTRODUCTION SPARE PARTS LIST, U.S. SPARE PARTS LIST, INTERNATIONAL PARTS LIST 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT PARTS LIST 6-1 6-2 6-9 6-10 6-21

6.1 INTRODUCTION

This chapter provides a reference for spare parts for the COMPAQ DESKPRO 386 Personal Computer.
Each section contains a parts list which consists of: Description - The name of the particular part or parts kit Part Number - The number to use when ordering parts from Compaq Computer Corporation When multiple parts have the same part number, the parts are only available as part of a kit. The number shown represents the part number of that kit.
Chapter 6, Illustrated Parts Catalog
6.2 SPARE PARTS LIST, U.S.
Table 6-1. Spare Parts List, U.S.
Description System Board 1. Power Supply 2. Fuse Kit 3. AC Power Cord 4. Speaker/Board Guide Assembly 5. System Unit Chassis 6. Reinforcement Brace 7. System Unit Bezel Assembly 8. Drive Housing Assembly 9. System Unit Cover 10. Security Lock Assembly with Keys 11. Security Lock Switch with Cable 12. Security Lock Switch 13. RF Shield Boards 14. System Board, Version 1 15. System Board with 80387 Coprocessor Socket, Version 2 16. Video Display Controller Board 17. COMPAQ Enhanced Color Graphics Board, Version 1 18. COMPAQ Enhanced Color Graphics Board, Version 2 108060-001 108407-001 101340-001 106373-001 109196-001
Part Number 108065-001 102930-001 101155-001 101062-001 108267-001 101352-001 108204-001 108266-001 108205-001 105036-001 106860-001 102767-001 108264-001
Table 6-1. Spare Parts List, U.S. Continued
Description 19. Video Display Controller Board 20. COMPAQ Video Color Graphics Board 21. ESDI Fixed Disk Drive Controller Boards (130-Megabyte) 1:1 Interleave 3:1 Interleave 22. ESDI External 300/600-Megabyte Fixed Disk Drive Controller Board 23. Fixed Disk Drive Controller Board (70-Megabyte) 24. Asynchronous Communications/Parallel Printer Board 25. 2400-Baud Internal Modem 26. Tape Controller Board (135-Megabyte) 27. 80287-8 Numeric Coprocessor 28. 80387-16 Numeric Coprocessor 29. System ROM-Qty 2 30. Enhanced Color Graphics ROM Memory Boards 31. 32-Bit System Memory Board 32. 1 - to 2-Megabyte 32-Bit Memory Expansion Board 33. 4- to 8-Megabyte 32-Bit Memory Expansion Board 34.5- to 2-Megabyte 16-Bit Memory Expansion Board 35. 1-Megabit 1 Static RAM Memory Chip 36. 256K 1 Static Column RAM Memory Mass Storage Devices 37. 1.44-Megabyte 3-Inch Diskette Drive 38. 1.2-Megabyte 5-Inch Diskette Drive 113263-001 102775-001

Part Number 101340-001 109253-001 113245-001 108140-001 115839-001 102778-001 106886-001 113699-001 113259-001 106558-001 108408-001 108283-001 106686-001 108059-001 108082-001 108083-001 108138-001 108144-001 108143-001
Description 39. 360-Kbyte 5-Inch Diskette Drive 40. 130-Megabyte Fixed Disk Drive 41. 70-Megabyte Fixed Disk Drive 42. 40-Megabyte Fixed Disk Drive 43. 135-Megabyte Fixed Disk Drive Backup (Tape) 44. 40-Megabyte Fixed Disk Drive Backup (Tape) 45. DC 600XTD Tape Cartridge 46. DC 2000 Tape Cartridge 47. Mass Storage Power Cable 48. Diskette Drive Signal Cable 49. 130-Megabyte Fixed Disk Drive Cables (ESDI) (Set) 50. 130-Megabyte Fixed Disk Drive Cable, 34-Position 51. 130-Megabyte Fixed Disk Drive Cable, 20-Position 52. Fixed Disk Drive Cables (Set) 53. Fixed Disk Drive Cable, 34-Position 54. Fixed Disk Drive Cable, 20-Position 55. 40-Megabyte Fixed Disk Drive Cable (Single) 56. 40-Megabyte Fixed Disk Drive Cable (Dual) 57. 130/300-Megabyte Fixed Disk Drive Cable (ESDI) (20 position) 58. 135-Megabyte Fixed Disk Drive Backup (Tape) Cable 59. Tape Utility Upgrade Kit 60. Cable Kit (Contains the Mass Storage Power Cable (101137-001), Diskette Drive Signal Cable (101380-001), and 40-Megabyte Fixed Disk Drive Cable, Single (108086-001)) Part Number 102928-001 108080-001 102932-001 108058-001 113218-001 108081-001 113234-001 108142-001 101137-001 101380-002 108249-001 100625-005 100625-006 100641-002 100625-003 100625-004 108086-001 108087-001 108249-001 113198-001 106613-001 108146-001
Description Keyboards 61. Keyboard, COMPAQ Enhanced 62. Enhanced Keyboard Cable 63. 84-Key Keyboard 64. Keyboard Connector 65. Keyboard Feet (Rubber) 65. Enhanced Keyboard Template Monitors 67. Monitor Assembly - Dual-Mode Green 68. Monitor Assembly - Dual-Mode Amber 69. Monitor Assembly - Video Graphics Color 70. Monitor Assembly - Video Graphics Monochrome 71. Monitor Feet Documentation and Diskettes 72. MS-DOS VERSION 3.3 REFERENCE GUIDE 73. MS-DOS VERSION 3.2 REFERENCE GUIDE 74. MS-DOS VERSION 3.1 REFERENCE GUIDE 75. BASIC VERSION 3.3 REFERENCE GUIDE 76. BASIC VERSION 3.2 REFERENCE GUIDE 77. BASIC VERSION 3.1 REFERENCE GUIDE 78. COMPAQ DESKPRO 386 OPERATIONS GUIDE * Contained in the Miscellaneous Hardware Kit (102709-001)
Part Number 108067-001 106607-001 102776-001 108247-001 * 106776-001 101439-001 101439-002 109255-001 109254-001 * 106979-001 106650-001 105350-001 106983-001 106653-001 105345-001 108291-003
Description 79. COMPAQ DESKPRO 386 MAINTENANCE AND SERVICE GUIDE (with ADVANCED DIAGNOSTICS) 80. COMPAQ DESKPRO 366 MAINTENANCE AND SERVICE GUIDE (with Test Cable) 81. COMPAQ DESKPRO 386 TECHNICAL REFERENCE GUIDE 82. SUPPLEMENTAL SOFTWARE GUIDE 83. COMPAQ SERVICE QUICK REFERENCE GUIDE (Set of 5) 84. COMPAQ SERVICE QUICK REFERENCE GUIDE with covers (Set of 5) 85. SY-TOS TAPE OPERATING SYSTEM USERS GUIDE and Diskette 86. ADVANCED DIAGNOSTICS Software 87. USER PROGRAMS Kit (3 diskettes) 88. MS-DOS/Basic Version 3.1 Diskettes 89. MS-DOS/Basic Version 3.2 Diskettes 90. MS-DOS/Basic Version 3.3 Diskettes 91. MS-DOS/Basic Version 3.3 Support Diskette 92. Out-of-Warranty Form 93. Extended Service Agreement Form Tools 94. Universal Coprocessor Removal Tool 95. Socket/Torx Tool Kit 96. Torx T-10 Screwdriver 97. Torx T-15 Screwdriver 108420-001 101089-001 105155-001 105156-001

Be sure that the fuse clips t tightly to ensure a good electrical connection. 1. Put the fuse in the fuse holder. 2. Position the fuse holder in the casing, and press until you feel the fuse holder snap into place (Figure 7-7).
Figure 7-7. Replacing the Power Fuse.
7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES
To prepare the system unit for the internal removal and replacement procedures, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD
2. Disconnect any peripheral devices (printers, modems, etc.) from the computer. 3. Disconnect the AC power cord from the AC outlet and from the system unit. 4. Place the system unit on a at surface with the front facing you. To reassemble the computer, reverse steps 1 through 3 of the preceding removal procedures.
7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION
To remove the system unit cover, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES
Before removing the cover, be sure that the ON/OFF switch is in the OFF position and the AC power cord is disconnected. 2. Remove the three screws on the back of the system unit (Figure 7-8).
Figure 7-8. Location of the Three Screws on the Back of the System Unit.
3. Unlock the security lock to free the system unit cover. 4. Positioning yourself at the front of the system unit, slide the system unit cover toward you until you feel it stop. 5. Lift the cover straight up and off of the system unit (Figure 7-9).
Many of the components on the system board and expansion boards are sensitive to static electricity. Before touching any of the components, be sure that you are discharged of static electricity by briey touching a metal object, such as the frame of the computer. 6. Familiarize yourself with the arrangement of the components in the computer (see Figure 7-10). To replace the system unit cover, reverse Steps 1 through 5 of the preceding removal procedures.
Figure 7-9. Removing the System Unit Cover.
Figure 7-10. Overhead View of the COMPAQ DESKPRO 386 Personal Computer with the System Unit Cover Removed.

7.7 POWER SUPPLY

The power supply is attached to the system board by a power supply cable and connector. To remove the power supply, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES d. 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION 2. Locate the power supply assembly (Figure 7-11).

Figure 7-11. Location of the Power Supply Assembly.
3. Remove the four screws that secure the power supply assembly to the chassis (Figure 7-12).
4. Slide the power supply assembly toward the drive housing assembly until the power supply assembly is released from the tabs holding it to the bottom of the chassis (Figure 7-13).
Figure 7-12. Removing the Power Supply Screws.
Figure 7-13. Removing the Power Supply Assembly.
5. Shift the power supply slightly away from the system board to locate the power supply connector on the system board (Figure 7-14).
6. Disconnect the power supply connector from the system board, and lift the power supply assembly out of the chassis. To replace the power supply, reverse Steps 1 through 6 of the preceding removal procedures
Figure 7-14. Location of the Power Supply Connector on the System Board.

7.8 BATTERY

The battery is secured to the system unit chassis with a VELCRO strip and is connected to the system board by a small cable and connector. Disconnecting the battery removes the time, date, and system conguration information from the system memory. Any time you remove the battery, you must rerun the SETUP program.
To remove the battery, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES d. 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION
This procedure is to be performed by Authorized COMPAQ Computer Dealers only.
2. Locate the battery (Figure 7-15).
3. Locate and remove the battery connector from the system board (Figure 7-16).
Figure 7-16. Location of the Battery Connector.
Figure 7-15. Location of the Battery.
4. Remove the battery from the system unit (Figure 7-17). 5. To dispose of the battery properly, see Service Bulletin 46.
To replace the battery, follow these steps: 1. Reverse Steps 1 through 4 of the preceding removal procedures. 2. Run the SETUP program.
Figure 7-17. Removing the Battery.

7.9 SECURITY LOCK

The security lock secures the security lock assembly to the system unit cover. You do not have to remove the security lock assembly in these procedures. To remove the security lock, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES d. 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION 2. Remove the security lock key.

3. Remove the screw and clip that secure the security lock assembly to the system unit cover (Figure 7-18).
Figure 7-18. Removing the Security Lock (Interior View).
To replace the security lock, reverse Steps 1 through 3 of the preceding removal procedures.

7.10 EXPANSION BOARD(S)

The following procedures apply to each board. To remove an expansion board, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES d. 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION
2. Locate and remove the reinforcement bracket by removing the rear screw rst and then the front screw (Figure 7-19). This sequence prevents the reinforcement bracket from rotating.
Figure 7-19. Location of the Reinforcement Bracket.
3. Remove the RF shield (Figure 7-20).
4. Remove the cable cover (Figure 7-21).
Figure 7-21. Location of the Cable Cover.
Figure 7-20. Location of the RF Shield.
5. Remove the retaining screw that secures the expansion board to the chassis. 6. Disconnect any signal cables attached to the expansion board (Figures 7-22, 7-23, 7-24).
Figure 7-23. Removing the Multipurpose Fixed Disk Drive Controller Board Signal Cables.
Figure 7-22. Removing the ESDI Fixed Disk Drive Controller Board Signal Cables.
7. Lift the board out of the connector(s) on the system board (Figure 7-25).
Figure 7-24. Removing the Fixed Disk Drive Controller Board Signal Cables.
Figure 7-25. Removing an Expansion Board.
To replace an expansion board, reverse Steps 1 through 7 of the preceding removal procedures.

7.COPROCESSOR

The 80287 coprocessor is installed on the system board under slots 1, 2, and 3. To remove the 80287 coprocessor, follow these steps: 1. Complete the removal procedures in the following sections: a. 7.2 MONITOR b. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES d. 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION e. 7.10 EXPANSION BOARD(S). Remove expansion boards in slots 1, 2, and 3.
2. Locate the 80287 coprocessor on the system board, and lift the coprocessor off with your ngers (Figure 7-26).
Figure 7-26. Location of the 80287 Coprocessor Socket on the System Board.

Figure 7-54. Power Supply Screws.
3. Slide the power supply -inch to 1-inch toward the drive housing (Figure 7-55). Be sure to clear the tabs on the bottom of the chassis. These tabs hold the power supply assembly in place.
5. Disconnect the power supply connector from the external interface adapter board and lift the power supply assembly out of the chassis. To replace the power supply assembly, reverse steps 1 through 5.
External Interface Adapter Board
To remove the external interface adapter board from the expansion unit complete the following steps: 1. Complete the steps at the beginning of this section. 2. Disconnect the 20- and 34-pin signal cables from the external interface adapter board (Figure 7-56).
3. Disconnect the universal drive power and power supply cables from the external interface adapter board (Figure 7-57).
Figure 7-57. Removing Power Cables.
Figure 7-56. Removing the 20- and 34-Pin Signal Cables.
4. Remove the external interface adapter board. NOTE: Inspect new external interface adapter board for shipping damage prior to installation. To replace the external interface adapter board, reverse steps 1 through 4.
NOTE: For internal or external switch settings for the 300-/600-Megabyte Fixed Disk Drive Expansion Unit, see Chapter 8, JUMPER POSITIONS AND SWITCH SETTINGS. For internal or external cable connections and congurations for the 300-/600-Megabyte Fixed Disk Drive Expansion Unit, see Chapter 9, MASS STORAGE CONFIGURATIONS.
Chapter 8 JUMPER SETTINGS AND SWITCH SETTINGS 8.1 8.2 8.2 8.4 8.5 INTRODUCTION SYSTEM BOARDS 32-BIT SYSTEM MEMORY BOARD.5- TO 2-MEGABYTE 16-BIT MEMORY EXPANSION BOARD 1- TO 2-MEGABYTE AND 4- TO 8-MEGABYTE 32-BIT MEMORY EXPANSION BOARDS Bank 3 Enabled Bank 3 Disabled ESDI FIXED DISK DRIVE CONTROLLER BOARD MULTIPURPOSE FIXED DISK DRIVE CONTROLLER BOARDS FIXED DISK DRIVE CONTROLLER BOARD HOST ADAPTER BOARD 8-1 8-2 8-6 8-8 8-10 8-11 8-11 8-12 8-14 8-18 8-20

8.6 8.7 8.8 8.9

8.10 COMPAQ ENHANCED COLOR GRAPHICS BOARD Conguration Switch Bank SW1 Conguration Switch Bank SW2 Conguration Switch Bank SW3 Jumper P1 Settings for the COMPAQ Enhanced Color Graphics Board Jumper JP3 Setting for the COMPAQ Enhanced Color Graphics Board 8.11 VIDEO DISPLAY CONTROLLER BOARDS 8.12 COMPAQ VIDEO GRAPHICS CONTROLLER BOARD 8.13 ASYNCHRONOUS COMMUNICATIONS/PARALLEL PRINTER BOARD 8.14 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT
8-22 8-24 8-26 8-27 8-27 8-27 8-28 8-31 8-32 8-36

8.1 INTRODUCTION

This chapter shows the switch and jumper locations on the following: System board 32-bit system memory board
Multipurpose xed disk controller board Fixed disk controller board Tape adapter board
COMPAQ Enhanced Color Graphics Board Video display controller board COMPAQ Video Graphics Controller Board Asynchronous communications/parallel printer board
.5- to 2-megabyte 16-bit memory expansion board 1-to 2-megabyte or 4-to 8-megabyte 32-bit memory expansion board ESDI Fixed Disk Drive Controller Board

ESDI External Fixed Disk Controller Board
Chapter 8, Jumper Settings and Switch Settings

8.2. SYSTEM BOARDS

Figure 8-1. COMPAQ DESKPRO 386 Personal Computer System Board Version 1 (assy. no. 000401).
Table 8-1. System Board (assy. no. 000401) Switch Settings
Switch Position Number Switch Positions ON ON OFF ON OFF ON OFF OFF ON OFF Function Reserved Coprocessor installed Coprocessor not installed (default) Coprocessor speed 4 MHz Coprocessor speed 8 MHz (default) CPU boot speed 16 MHz except when accessing diskette drive; then 8 MHz (default) CPU boot speed 16 MHz always Reserved COMPAQ VDU, COMPAQ ECG, compatible EGA, RGBI, or VGC (default) Third-party monochrome
Table 8-2. Locations for the Processor, Coprocessor, and System ROM on the System Board (assy. no. 000401)
Location U11 EVEN U13 ODD U39 U56 Description System ROM System ROM Coprocessor (80287-3, -6, or -8) Processor (80386-16)
Figure 8-2. COMPAQ DESKPRO 386 System Board Version 2 (assy. no. 000558).
Table 8-3. System Board (assy. no. 000558) Switch Settings
Switch Position Number Switch Positions ON ON OFF ON OFF ON OFF OFF ON OFF 7 ON OFF 8 ON Function Reserved Coprocessor installed Coprocessor not installed (default) 80287-3 or -6 coprocessor speed 4 MHz 80286-8 coprocessor speed 8 MHz (default) CPU boot speed 16 MHz except when accessing diskette drive; then 8 MHz (default) CPU boot speed 16 MHz always Reserved COMPAQ VDU, COMPAQ ECG, compatible EGA, RGBI, or VGC (default) Third-party monochrome 80287-3, -6, or -8 coprocessor or no coprocessor installed (default) 80387-16 coprocessor Reserved
Table 8-4. Locations for the Processor, Coprocessor, and System ROM on the System Board (assy. no. 000558)
Location U13 EVEN U15 ODD U42 U60 U76 Description System ROM System ROM Coprocessor (80287-3, -6, or -8) Coprocessor (80387-16) Processor (80386-16)
8.3 32-BIT SYSTEM MEMORY BOARD
Figure 8-3. 32-Bit System Memory Board (assy. no. 000413).
Table 8-5. Jumper Settings for the 32-Bit System Memory Board (assy. no. 000413)
Jumper Selection E1 to E2, E4 to E5 E7 to E8 E2 to E3, E4 to E5 E7 to E8 E2 to E3, E5 to E6 E7 to E8 E1 to E2, E4 to E5 E8 to E9 E2 to E3, E4 to E5 E8 to E9 E2 to E3, E5 to E6, E8 to E9 Function 256 Kbytes of base memory selected No extended memory 512 Kbytes of base memory selected No extended memory selected 640 Kbytes of base memory selected No extended memory selected (default) 256 Kbytes of base memory selected 1024 Kbytes of extended memory selected 512 Kbytes of base memory selected 1024 Kbytes extended memory selected. 640 Kbytes of base memory selected 1024 Kbytes of extended memory selected Memory Selected 1-megabyte 1-megabyte 1-megabyte 2-megabyte or above 2-megabyte or above 2-megabyte or above

Communication Interface Module

Cat. No. 1784-KT/B

Installation Data
Introducing the 1784KT/B Communication Interface Module
The 1784-KT/B Communication Interface Module allows personal computers, workstations or terminals to communicate with Allen-Bradley processors and controllers, either through direct connections or over Data Highway Plus networks. For information about using the 1784-KT/B with a specific device, see the devices user documentation.
ATTENTION: The following provides information for Allen-Bradley Industrial Computer and Communication Group (ICCG) products that have been verified to meet the Electromagnetic Interference (EMI) requirements of the Federal Communication Commission (FCC) and the Canadian Department of Communications for use in a commercial environment: 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.
ATTENTION: This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le prsent appareil numrique nmet pas de bruits radiolectriques dpassant les limites applicables aux appareils numriques de la class A prescrites dans le Rglement sur le brouillage radiolectrique dict par le ministre des Communications du Canada.
Installation Data Communication Interface Module Cat. No. 1784KT/B
We will refer to the 1784-KT/B Communication Interface Module as simply the 1784-KT throughout this document.
What This Document Contains
This document contains the following sections: Introducing the 1784-KT Communication Interface Module Important User Information Features of the 1784-KT Compatibility How the 1784-KT Operates Handling the 1784-KT Module 1784-KT Configuration Information Installing the 1784-KT into a Computer Connecting Your 1784-KT Ordering Information The Loopback Test Plug System Memory and Interrupts Specifications
Important User Information
Because of the variety of uses for products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication. Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation and Maintenance of Solid State Control (available from your local Allen-Bradley office) describes some important differences between solid-state equipment and electromechanical devices which should be taken into consideration when applying products such as those described in this publication. Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen-Bradley Company, Inc. is prohibited.
ATTENTION: With any complex communication system you need to identify potential application-related communication problems and make provisions in the system design to prevent hazardous or undesired consequences if a problem occurs. These problems include, but are not necessarily limited to, the possibility of: unexpected loss of communication erroneous or incomplete data being supplied to the network and passed on to your application

Features of the 1784KT

Your 1784-KT Communication Interface Module is an ISA half-size 8-bit card that can be inserted into any 8- or 16-bit ISA expansion slot. The 1784-KT provides the following features: Makes your personal computer an active node on Data Highway Plus networks Increases application response time by removing the RS-232 bottleneck Provides single cable connection to a PLC-2, PLC- 3, or PLC-5 family programmable controller Is address selectable; may be used with other option boards installed in your personal computer When combined with 6001-F1E software or INTERCHANGE software, allows you to create your own custom interface to Data Highway Plus networks Supported by the following software: 6001-FIE software 6200 software INTERCHANGE software Advisor PC (series E or later) ControlView software

Compatibility

Operation of the 1784-KT has been verified with the following:

Company: AllenBradley Model: 1771 Information Processor (1771DSX2) (requires KT Expander Module 1771DXKT) 1784T35 Industrial Terminal 1784T50 Industrial Terminal AllenBradley 6121 AllenBradley 6122 T53 Industrial Programming Terminal 6160T53 T60 Industrial Workstation 6160PCD2, PCN2, PCD4, PCN4 T70 Industrial Workstation 6170 series IBM PCXT/AT Compaq Portable 286 Compaq Portable II Compaq Portable III Compaq Deskpro 286 Compaq Deskpro 386

IBM Compaq

Dell Samsung HewlettPackard
Dell 316 386SX Samsung S550 Samsung 386 HP 9000/700 series

How the 1784KT Operates

The 1784-KT allows you to: directly connect to: - PLC-2 processors - PLC-3 processors communicate with nodes on Data Highway Plus networks (including PLC-5 and PLC-5/250 processors) communicate with SLC processors (requires 1785-KA5 bridge) The 1784-KT performs data transmission, management, and local Data Highway Plus diagnostics. The interface to the host processor is through a board-resident dual-port memory that passes preformatted Data Highway Plus packets. When the host powers up and downloads module code, it runs diagnostics to verify the 1784-KT modules operation. Allen-Bradley interface software (including 6001-F1E, 6200, Interchange, Advisor PC, and ControlView) manages data transmission and reception through the board-resident dual-port memory.
Handling the 1784KT Module
The 1784-KT utilizes CMOS technology, which is highly sensitive to Electro Static Discharge (ESD). ESD may be present whenever you are handling the 1784-KT. Handling the 1784-KT without any ESD protection can cause internal circuit damage that may not be apparent during installation or initial use. A grounding wrist strap has been shipped with the 1784-KT to be worn during the installation procedure. Instructions for use of the strap are found on the back of its package. ATTENTION: The following is a list of precautions to guard against ESD damage: 1. Before handling the module, be sure to wear the provided static strap and touch a grounded object to discharge any built-up static charge. When selecting your memory and interrupt options, avoid touching other components on the 1784-KT. Avoid touching the back plane connector or interface connector pins located on the 1784-KT. If the module is not in use, store the 1784-KT in the static bag that the module was shipped in.

1784KT Configuration Information
Important: Do not change the (factory set) configuration settings until you have read this section. The 1784-KT comes with preset memory location (D400) and no interrupt. This may not be appropriate for your application. See the section Installing the 1784-KT into a Computer, which begins on page 6, for information on memory locations and interrupt settings.
ATTENTION: When selecting configuration settings, check for conflicts with other interface cards and system memory. If there is a conflict, the system will not operate properly.
Installing the 1784KT into a Computer
The following steps outline how to install the 1784-KT into a terminal, workstation or computer. Refer to the terminals, workstations or computers hardware user manual for further assistance. 1. 2. Turn off the computer and disconnect the ac power cord. Remove all covers necessary to gain access to the computers expansion slot area. The industrial terminals may have retainer brackets. Consult the user manual for access procedures.
ATTENTION: If you are not wearing the grounding wrist strap, put it on at this time.
Remove the expansion slot bracket that covers the computer I/O opening. Remove the 1784-KT from the static bag. Verify the configuration settings for your system. Use the worksheets that begin on page 15 for assistance.
Important: If another card is already using your desired switch settings, you will have to change the cards switch settings to an open memory location. If you are using the default settings, go to step 10. If you are not using the default settings, go to step 6. 6. Select a memory location. Table A shows the recommended memory locations for Allen-Bradley terminals, workstations and computers. Table B shows all the available memory locations and switch settings for the card.
Table A Recommended memory settings
Equipment: 1784T35 1784T50 T53 Industrial Programming Terminal T60 Industrial Workstations T70 Industrial Workstations Preferred Memory Location: C800 C000 D400 D000, D400, or D800 D400
Table B Selecting a memory location
Memory Address (Hex) M S B L S B A14 (switch 1) up down up down up down up up down up down up down up A15 (switch 2) up up down down up up down up up down down up up down PCB Board Switch Settings Switch Settings2 A18 (switch 5) up up up up up up up down down down down down down down A19 (switch 6) down down down down down down down down down down down down down down L S B M S B

A16 (switch 3) up up up up down down down up up up up down down down
A17 (switch 4) down down down down down down down up up up up up up up
A000:0000 A400:0000 A800:0000 AC00:0000 B000:0000 B400:0000 B800:0000 C000:0000 C400:0000 C800:0000 CC00:0000 D000:0000

101011 011011

D400:0000 D800:0000
This is the factoryset address and is the recommended setting. Some system peripherals (such as VGA cards) may require a different address. Check your system peripheral's documentation to see if it requires different settings. 2 This is the 6200 software online configuration setting for the 1784KT. up = 0 down = 1
Select an interrupt setting. Your choices are: IRQ3 IRQ4 IRQ5 IRQ7 no interrupt
Table C shows the recommended interrupt settings for Allen-Bradley industrial terminals, workstations and computers that use the 1784-KT.
Table C Recommended interrupt settings
Equipment: 1784T35 1784T50 T53 Industrial Programming Terminal T60 Industrial Workstations T70 Industrial Workstations Preferred Interrupt: IRQ5 IRQ5 no interrupt
Set the memory location address, by pushing the switches in at either the top or bottom, to reflect the selected address of the memory location.
Up = 0 switch pressed in at top
Down = 1 switch pressed in at bottom
Interrupt Jumper (shown in no interrupt" position)
Address Switch (shown at D400:0000 setting)
Set the interrupt by placing the provided jumper in the proper location. Remove the jumper and place it on the two pins that correspond to the interrupt of your choice. If an interrupt is not required by your software program, place the jumper in the no interrupt position.
Jumper Selection INT 3 INT 4 INT 3 position INT 4 position INT 5 position INT 7 position no interrupt INT 5 INT 7 Interrupt Selection IRQ3 IRQ4 IRQ5 IRQ7

Jumper

This end is facing toward the PCB gold fingers.

no interrupt

(Factory Default setting: no interrupt.)
10. With a hand on each end of the board, slowly slide the 1784-KT into the I/O expansion slot. Firmly insert the edge card connector into the I/O expansion slot connector. 11. Install the retaining screw into the retaining bracket and tighten. 12. Install all brackets (if applicable) and covers removed in step 2.

Connecting Your 1784KT

Different configurations require different procedures for connecting the 1784-KT to a PLC. The procedures begin on page 10. Before you make the connections, make sure you have the correct cables. Cables for various PLCs are listed below.
For: PLC2 Family Programmable Controllers PLC3 Family Programmable Controllers PLC5/10, 5/12, 5/15,5/25, 5/VME (6008LTV), and PLC5/250 Programmable Controllers PLC5/11, 5/20, 5/30, 5/40, 5/60, 5/80, and 5/VME (1784V40) Programmable Controllers Use Cable with Cat. No.: 1784CP2 1784CP3 1784CP 1784CP6 (refer to publication 17842.26) or 1784CP7 Adapter with 1784CP Cable (refer to publication 17842.29) See Page: 12

ATTENTION: To avoid personal injury, always disconnect the ac power before making the cable connection.
Connecting Your 1784KT to a PLC2
To connect the 1784-KT to a PLC-2, follow the steps below: 1. Plug the 62-pin connector end of the 1784-CP2 cable into the 1784-KT and secure with captive screws.

1784 - KT Board

1784 - CP2 Cable

Program Panel"

16687a
Connect the opposite end of the 1784-CP2 cable into the PROGRAM PANEL connector on the PLC-2. Reinstall the ac power cord and turn on the computer.
Figure 1 shows cable pinouts for the 1784-CP2 cable.
Figure 1 Cable Pinouts for the 1784CP2 Cable
Cable shield tied to chassis A2 TXD A2 TXD RET A2 OUT0 RET A2 OUT0 A2 RXD A2 RXD RET A2 IN0 A2 IN0 DET 62 pin D - shell To Program Panel"
Connecting Your 1784KT to a PLC3
To connect the 1784-KT to a PLC-3, follow the steps below: 1. Plug the 62-pin connector end of the 1784-CP3 cable into the 1784-KT and secure with captive screws.

1784 - CP3 Cable

Peripheral Channel 0"

16687b

Connect the opposite end of the 1784-CP3 cable (labeled Industrial Terminal End) into the PERIPHERAL CHANNEL 0 connector on the PLC-3. Reinstall the ac power cord and turn on the computer.
Figure 2 shows cable pinouts for the 1784-CP3 cable.
Figure 2 Cable Pinouts for the 1784CP3 Cable
A1 TXD A1TXD RET A1 IN0 Chassis Gnd Signal Gnd A1 RXD A1 TXD RET A1 IN1 A1 OUT0 A1 OUT1 A1 IN62 pin D - shell
Connecting Your 1784KT to a PLC5 (Data Highway Plus)
To connect the 1784-KT to a PLC-5, follow the steps below: 1. Plug the 62-pin connector end of the 1784-CP cable into the 1784-KT and secure with captive screws.

PLC - 5 Family Processor

1784 - KT Board 1784 - CP Cable Peer Communication Interface Connector

16687c

Connect the opposite end of the 1784-CP cable into the PEER COMM INTFC connector on the PLC-5. Reinstall the ac power cord and turn on the computer.
Important: To allow communication between PLC-5s and other Data Highway Plus nodes, you must be connected to a PLC-5 using a 1784-CP cable. The Data Highway Plus network is connected to the PLC-5. Figure 3 shows cable pinouts for the 1784-CP cable.
Figure 3 Cable Pinouts for the 1784CP Cable

3 Blue 6 L1 Shield LTo Peer Communication Interface

The Loopback Test Plug

The 1784-AGT Test Plug is available for diagnostic testing of the 1784-KT. Its internal wiring is shown below.
A1 TXD 2 A1 TXD RET 2 A1 INA2 TXD 1 A2 TXD RET 14 A4 TXD A4 TXD RET A4 OUT0 A4 OUT0 RET A4 OUT1 A4 OUT1 RET Sig Gnd Sig gnd A3 OUT1+ A3 OUT1A4 IN2+ RET 2 A4 IN2A1 OUT1 A3 IN2+ A3 IN= PLC= PLCA3 IN1+ A3 IN1A4 OUT2 RET A4 OUT2 A1 IN1 A1 IN2 A3 OUT2+ A3 OUT2A4 RXD+ A4 RXD- RET A4 1N0+ A4 IN0- RET A4 IN1+ A4 IN1- RET A1 RXD A1 RXD RET A1 OUT0 A2 RXD A2 RXD RET A2 IN0 A2 IN0 RET A3 RXD+ A3 RXDA3 IN0+ A3 IN0-
1 A2 OUTA2 OUT0 RET A3 TXD+ A3 TXDA3 OUT0+ A3 OUT0-

Chassis Gnd

2 A1 OUT2
All unidentified pins are reserved for future use 1784 - AGT
System Memory and Interrupts
Information is passed between the computer system and the 1784-KT through 2 Kbytes of memory located in the interface module. This 2 Kbyte memory is memory mapped into an open memory location in your computer system. The definition of open is a location that has not been configured for another optional interface card or system. The 1784-KT address decoding allocates a 16 Kbyte memory location. So, when selecting an open memory location, make sure there is a 16 Kbyte block. Also, the definition of open applies to hardware system interrupts. Depending on the interface card you have installed into your computer, only a few select interrupts may be open for the 1784-KT. Lets say the targeted computer for installing a 1784-KT is an IBM PC-AT with the following options:
640 K System Memory EGA Card Color Monitor Diskette Drive Hard Drive Serial Port Card (Configured for port 1) 00000:000009000:FFFF 0A000:00000A000:FFFF 0B000:00000B000:FFFF 3F03F7 1F01FF 2F82FF IRQ 6 IRQ 14 IRQ 4
The memory map for this system would be what is documented in the System Memory Allocation Worksheet (see page 15) for the IBM PC-AT. Open memory for a 1784-KT would be from 0B800:0000 to 0DF00:0FFF. By using the memory default setting, the 1784-KT would fit into this open memory at locations 0D400:0000 to 0D700:0FFF. The 1784-KT supports four interrupts: IRQ3, IRQ4, IRQ5, and IRQ7. Refer to the Hardware Interrupt Allocation Worksheet (page 17) for the IBM PC-AT for possible open interrupts. Only IRQ4 is used for the serial port card configured for port 1. The 1784-KT uses the no interrupt setting as the default. Use the following worksheets to help manage your systems memory, I/O, and interrupt assignments. The IBM PC-AT and IBM PC-XT system assignments have been chosen as a reference. These IBM assignments are available in their respective IBM Technical Manuals and are subject to change by IBM. Important: The 1784-KT does not require a system I/O address. The 1784-KT only uses addressable memory and an interrupt. The I/O map is provided so that you can document your entire computer system. To use the worksheets, enter your computers memory, I/O, and interrupt assignments in the column labeled Your System.

IBM PC AT System Memory Allocation Worksheet System Memory
0000:0000 07000:FFFF 8000:0000 09000:FFFF A000:0000 A400:0000 A800:0000 AC00:0000 B000:0000 B400:0000 B800:0000 BC00:0000 C000:0000 C400:0000 C800:0000 CC00:0000 D000:0000 D400:0000 D800:0000 E000:0000 E00:FFFF F000:0000 F000:FFFF 10000:0000 FD000:FFFF FE000:0000 FE00:FFFF FF000:0000 FF000:FFFF 64K ROM Reserved on System Board 64K ROM Reserved on System Board I/O Channel Expansion Memory Maximum Memory 15 Mb 64K ROM Reserved on System Board 64K ROM Reserved on System Board Color/Graphics E.G.A.

IBM PC AT Assignments

512K Read/Write Memory on System Board 128K Read/Write Memory Expansion in I/O Channel

Your System

IBM PC AT System I/O Allocation Worksheet I/O Address
0000FF 1A0 1B0 1C0 1D0 1E0 1F290 2A02B0 2C0 2D0 2E0 2F390 3A0 3B0 3C0 3D0 3E0 3F0

System Board I/O

Fixed Disk Control Game I/O
278 - 27F: Parallel Printer Port 1

2F8 - 2FF: Serial Port 1

378 - 37F:Parallel Printer Port 1 SDLC, Bisynchronous 2
Monochrome Color/Graphics Monitor Adapter Diskette Controller & Serial Port 1
Hardware Interrupt Allocation Worksheet IBM PC AT
Interrupts IRQ 0 IRQ 1 IRQ 2 IRQ 3 IRQ 4 IRQ 5 IRQ 6 IRQ 7 IRQ 8 IRQ 9 C T L R 2 IRQ 10 IRQ 11 IRQ 12 IRQ 13 IRQ 14 IRQ 15 IBM PC AT Assignments Timer Output Keyboard (Output Buffer Full) Interrupt from CTLR 2 Serial Port 2 Serial Port 1 Parallel Port 2 Diskette Controller Parallel Port 1 Realtime Clock Interrupt Software Redirected to INT 0AH (IRQ2) Reserved Reserved Reserved Coprocessor Fixed Disk Controller Reserved Your System
Shaded Interrupts are supported by the 1784KT
IBM PC XT System Memory Allocation Worksheet
Memory Address 0000:0000 3F00:0FFF 4000:0000 9F00:0FFF A000:0000 A400:0000 A800:0000 AC00:0000 B000:0000 B400:0000 B800:0000 BC00:0000 C000:0000 C400:0000 C800:0000 CC00:0000 D000:0000 D400:0000 D800:0000 E000:0000 E400:0000 E800:0000 EC00:0000 F000:0000 FF00:0FFF 64K Base System ROM BIOS and BASIC Fixed Disk Control Color/Graphics Monochrome IBM PC XT Assignments 128256K Read/Write Memory on System Board 384K Read/Write Memory Expansion in I/O Channel Your System
IBM PC XT System I/O Allocation Worksheet
I/O Address 0000FF 1001FF 2A0 2B0 2C0 2D0 2E0 2F390 3A0 3B0 3C0 3D0 3E0 3F0 Diskette/Async Com (1) Color Graphics Bisynchronous Com 1 Monochrome Display/Printer 378 - 37F: Printer SDLC or Bisynchronous Com 2 Fixed Disk 2F8 - 2FF: Async Com (2) IBM PC XT Assignments System Board I/O Reserved Game I/O Expansion Unit Your System
Hardware Interrupt Allocation Worksheet IBM PC XT Interrupts
IRQ 0 IRQ 1 IRQ 2 IRQ 3 IRQ 4 IRQ 5 IRQ 6 IRQ 7

IBM PC XT Assignments

Timer Keyboard COM2 COM1 Hard Disk Floppy Disk Printer Shaded Interrupts are supported by the 1784KT

Specifications

Specifications for the 1784-KT are listed below.
Module Location The 1784KT/B can be installed in any slot that supports ISA 8bit cards Module Output Connector 62 Pin Dshell Outputs PLC2 Serial Interface PLC3 Serial Interface Data Highway Plus Module Compatibility AllenBradley 1771 Information Processor (1771DSX2) (requires KT Expander Module 1771DXKT) AllenBradley 1784T35 Industrial Terminal AllenBradley 1784T50 Industrial Terminal AllenBradley 6121 AllenBradley 6122 AllenBradley T53 Industrial Programming Terminal 6160T53 AllenBradley T60 Industrial Workstation 6160PCD2, PCN2, PCD4, PCN4 AllenBradley T70 Industrial Workstation 6170 series IBMXT/AT, or Compatible Compaq Portable 286 Compaq Portable II Compaq Portable III Compaq Deskpro 286 Compaq Deskpro 386
Hardware Interrupts IRQ3 (Com2) IRQ4 IRQ5 IRQ7 Baud Rate Asynchronous (PLC2 and PLC3 Controllers): 9600 19.2 K Synchronous (Data Highway Plus): 57.6 K PLC2: 10 ft (3m) PLC3: 10 ft (3m) Data Highway Plus PLC3 and PLC5: 10,000 ft (3,050m) @ 57.6 Kb Power Requirements +5V DC @.4A (2W) 12V DC @.04 (.48W) respectively Operating Temperature 32 to 1300F (0 to 550C) Humidity 5 to 95% Noncondensing
Dell 316 386SX Samsung S550 Samsung 386 HewlettPackard HP 9000/700 series
The following are registered trademarks of AllenBradley Company, Inc.: PLC, PLC2, PLC2/15, PLC3. The following are trademarks of AllenBradley Company, Inc.: Data Highway Plus, PLC5, ControlView, Interchange Compaq is a registered trademark of Compaq Computer Corporation. Dell is a registered trademark Dell Computer Corporation. HewlettPackard is a registered trademark of HewlettPackard Company. HP 9000 is a trademark of HewlettPackard Company. IBM, IBM PC AT, IBM PC XT, and IBM PC XT/AT are registered trademarks of International Business Machine Corporation. Advisor PC is a trademark of Dynapro Systems, Inc.
AllenBradley has been helping its customers improve productivity and quality for 90 years. AB designs, manufactures and supports a broad range of control and automation products worldwide. They include logic processors, power and motion control devices, manmachine interfaces and sensors. AllenBradley is a subsidiary of Rockwell International, one of the world's leading technology companies.
With major offices worldwide.
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Publication 17842.31 August 1993
Supersedes Publications 17842.31 February 1992 (for 1784KT/B) and 17842.17 May 1991 (for 1784KT/A)
Copyright 1993 AllenBradley Company, Inc. Printed in USA

PN 404637402