Service manual

ManualsBrandsAlpha Microsystems ManualsComputer equipmentEagle 250

DSM-00223-01

For Authorized

Service Personnel Only:

Eagle 250

Service Manual

Summary of content (20 pages)

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$/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 For Authorized Service Personnel Only: Eagle 250 Service Manual 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$
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FIRST EDITION: July 2000 -01 Version - January 2001 To re-order this document, request part number DSO-00223-00 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 the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
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Table of Contents INTRODUCTION............................................................................................................................... 1 OTHER EAGLE 250 DOCUMENTS.................................................................................................. 1 ACCESSING YOUR COMPUTER..................................................................................................... 1 ELECTRONIC EQUIPMENT HANDLING PRECAUTIONS .........................................................
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Eagle 250 Service Manual Page 1 INTRODUCTION The instructions in this document are intended only for authorized service personnel. Eagle 250 computers contain a high-output power supply, which produces current levels high enough to make it unsafe for unauthorized persons to perform work inside the chassis.
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Page 2 Eagle 250 Service Manual TOP COVER SCREWS 0 SCSI 115 6 7 4 5 2 3 0 1 Figure 1: Chassis Top Cover Screws Figure 2: Chassis Top Cover Removal Rev.
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Eagle 250 Service Manual Page 3 ELECTRONIC EQUIPMENT HANDLING PRECAUTIONS With the AC power cord unplugged and the top cover removed, the components inside your computer are vulnerable to damage caused by static discharge. Your body and clothing can store an electrical charge that can damage or destroy unprotected electronic components. Before handling any computer hardware, make sure your work area is properly protected against static discharge.
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Page 4 Eagle 250 Service Manual Printed Circuit Board Configuration The AM-138 board is shown in Figure 4. Your board has been factory tested and shipped with its configuration jumpers set in their standard default positions. There are only two areas on the board which may require you to change jumper settings: • Memory size select (JP7) • Enabling or disabling the supply of SCSI bus termination voltage (JP5)—default set at enabled. All other jumpers should be left in their factory-installed positions.
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Eagle 250 Service Manual Page 5 Remote reset jumper (JP1) On-board serial ports Batteries go here. (full Eagle 250 only) Wide SCSI connector Narrow SCSI connector Serial I/O expansion slots (Eagle 250 full configuration only) Memory jumpers P8: Remote reset adapter attaches here First memory SIMM Second memory SIMM Figure 4: AM-138 Board Rev.
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Page 6 Eagle 250 Service Manual AM-138 Board Jumpers Jumper Number JP1 Jumper Name RR-EN Default Setting out JP2 Level7 Select UPS JP3 20 16 TERMPWR IN out EN DISC Memory Size Select 32 16 25 20 33 33 50 66 SP IN See Table 4. JP5 JP6 JP7 JP8 JP9 out out out out IN out out IN out Notes When IN, enables remote reset through serial port 0 (this is not supported through AM-90 card); when out, allows remote reset cable attachment at P8. See page 8. 3-pin jumper; set to two pins at UPS side.
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Eagle 250 Service Manual Page 7 AM-138 Board Connectors The following table provides a brief overview of the connectors on the AM-138 board.
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Page 8 Eagle 250 Service Manual Remote Reset Capability The AM-138 board has an option to enable remote hardware reset, either through serial port 0, or by using the Remote Reset Adapter, PDB-10323-00. You cannot use remote reset through port 0 if port 0 uses an AM-90 card for its back panel connection; the AM-90 does not support this feature.
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Eagle 250 Service Manual U17 U17 + C31 C31 + Page 9 + + Figure 5: AM-138 Backup Battery Removal 4. Inspect the battery contacts and be sure they are clean before installing the new batteries. Use alcohol and a cotton swab to clean them, if necessary. 5. To install a new battery, insert the edge of the battery down through the square hole and under the left side of the plastic top. Be sure to install the new batteries with the (+) positive side up. 6.
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Page 10 Eagle 250 Service Manual WARNING! The SSD chip and boot PROM on the AM-138 board require a specialized tool for their removal. If you attempt to remove the SSD chip or boot PROM using a screwdriver or pocketknife, you could easily damage both the chip and the socket. This type of chip extraction tool is available at retail stores specializing in electronic components.
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Eagle 250 Service Manual Page 11 The AM-966-10 board uses the following connections and jumpers: Location J1 JP1 JP2 JP3 JP4 JP5 JP6 Description 26-pin cable to AM-138. Notice pin 1 orientation on Figure 7. Connects to Turbo switch. Connects to Reset switch. In an Eagle 250, this jumper must be on the upper two pins (those closest to J1). To speaker and front panel power. Connects to system activity (Turbo) light. Place connector on left two pins (white goes on center pin). Connects to disk activity (H.
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Page 12 Eagle 250 Service Manual The following procedures describe how to remove and install the memory SIMMs, and set the memory size jumpers. Removing Memory SIMMs To remove a memory SIMM from its connector: 1. Power down the computer. Remove the chassis cover and access the AM-138 board. 2. Press out on the metal retainer clips and gently tilt the top of the SIMM module, so it is free of the metal retainer clips. 3.
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Eagle 250 Service Manual Page 13 MAKE SURE THIS CURVE IN THE SIMM CARD ALIGNS WITH PIN-1 IN THE SIMM CONNECTOR. SIMM (SINGLE INLINE MEMORY MODULE) RETAINER CLIP RETAINER CLIP SIMM CONNECTOR PIN-1 INDICATOR Figure 8: AM-138 SIMM Module Installation Setting Memory Jumpers 1 2 4 1 2 4 BANK1 BANK0 JP7 After installing the SIMMs, set the jumpers at location JP7 on the AM-138 board according to the table below. As you turn on the computer, AMOS will automatically make the memory available.
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Page 14 Eagle 250 Service Manual Memory Module Size Combinations: 4MB 2 x 4MB 8 MB 8MB + 4MB 2 x 8MB 16MB 16MB + 4MB 16MB + 8MB 2 x 16MB 32MB 32MB + 4MB 32MB + 8MB 32MB + 16MB 2 x 32MB 64MB 64MB + 4MB 64MB + 8MB 64MB + 16MB 64MB + 32MB 2 x 64MB 128MB 128MB + 4MB 128MB + 8MB 128MB + 16MB 128MB + 32MB 128MB + 64MB 2 x 128MB Total Memory 4MB 8MB 8 MB 12MB 16MB 16MB 20MB 24MB 32MB 32MB 36MB 40MB 48MB 64MB 64MB 68MB 72MB 80MB 96MB 128MB 128MB 132MB 136MB 144MB 160MB 192MB 256MB Bank0 Settings 1 2 4 X X X X X
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Eagle 250 Service Manual Page 15 documentation accompanying the board. This section merely contains some cautions and issues to keep in mind when adding a serial I/O board to an Eagle 250 computer. The plastic connectors on the AM-138 are fragile, and can break if you are not careful when removing or installing I/O boards. To minimize the chance of damage: • Never apply excessive pressure or attempt to force a board into the connector. If aligned properly, the board should install easily.
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Page 16 Eagle 250 Service Manual 1 5.25 mounting bays; all are accessible from front panel 2 3 4 Used for front panel display 3.5 mounting bays; only #4 is accessible from front panel 5 6 NOTE: With the proper adapter, you can mount a 3.5" device in a 5.25” drive bay. Figure 10: Peripheral Bay Positions The following paragraphs give general instructions for mounting peripherals in the Eagle 250 cabinet.
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Eagle 250 Service Manual Page 17 1. Since the AM-138 is attached to the panel, you need to detach it from the computer’s back panel before removing the mounting panel. Remove the screws near the UPS status port and parallel port on the back panel. 2. Remove the two Phillips-head screws attaching the mounting panel to the chassis. Notice how the panel is positioned over the two alignment tabs on the bottom of the chassis.