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- ║ INTEL MATH COPROCESSOR HARDWARE TROUBLESHOOTING ║
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- ╚═════════════════════════════════════════════════════════════════════════╝
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- REPLACEMENT 8088
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- Any 8087 customer with a 4.77MHz 8088 showing '78 only as the
- date, can get a free replacement 8088. Contact Intel Customer
- Support for the replacement.
-
- NOTE: Only 4.77MHz 8088 chips will need to be upgraded. The
- 8088-2 & 8088-1 are OK. Chips containing copyrights by other
- manufacturers are also OK.
-
- 162 ERROR IN IBM PS/2 MODEL 50,60 & 80287-10
-
- After inserting the 80287 chip into a Model 50 or 60, the system
- will give you a error "162". To eliminate the error message, boot
- to your computer's Reference and run IBM's setup program. You may
- use "Automatic" if you haven't changed the configuration on any
- add-in cards in your computer.
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- 387DX & WEITEK SOCKETS
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- Many computers contain with a square socket for a Weitek math
- coprocessor. This socket has three rows of holes on all four
- sides. In many computers, such as the Compaq 386, the inner two
- rows of pins are compatible with the Intel 387DX. This gives you
- the option of using an 387DX or the Weitek math coprocessor.
-
- However, if you want to install an 387DX in the Weitek socket, you
- must use EXTREME CAUTION to orient the chip correctly; otherwise
- you could damage the computer and the 387DX. Read your computer's
- User Guide to determine the correct procedure for installing the
- 387DX in your computer. The Installation Guide for the 387DX
- contains general information which may be useful also. If you
- have trouble figuring out how to correctly install the chip, have
- your dealer perform the installation for you. Intel can't replace
- a part which has been destroyed by incorrect installation.
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- Some computers use the Weitek socket but DO NOT support the 387DX,
- such as the TANDY 4000. Contact your computer manufacturer or
- dealer for more specific information.
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- ═══════════════════════════════════════════════════════════════════════════
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- February 25, 1991 Intel FaxBack # 3062 Page 1
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- ║ INTEL MATH COPROCESSOR HARDWARE TROUBLESHOOTING ║
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- ╚══════════════════════════════ (continued) ══════════════════════════════╝
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- BURNED PIN ON 387DX
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- Incorrect installation is the most common cause for burned pins on
- the 387DX. In addition to burning pins on the 387DX chip, you
- may also damage the socket and/or system board.
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- In many computers, the 387DX is oriented differently from the
- other large chips. Carefully follow the manufacturer's
- installation instructions to avoid damaging the 387DX. The Intel
- warranty doesn't cover chips which were installed incorrectly.
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- COMPAQ SYSTEM PROBLEMS
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- If, after adding an Intel product (such as INBOARD, ABOVE BOARD or
- Math Coprocessor), your COMPAQ 286 computer begins to reboot
- itself automatically, it is usually a symptom of one of two
- problems:
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- The connection between the power supply and the system board
- could be defective. The computer will continue to operate until
- either an additional burden is placed on the power supply, or
- enough oxide builds up to cause the failure. The cure for this is
- to vigorously reseat the connection. Be careful to not apply
- excessive force and break the connector or system board.
- The power supply could be taxed beyond it's capabilities.
- The only solution for this problem is to replace the power supply
- with a bigger one.
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- IBM PS/2 MODEL 80 & 387DX & NOISE FROM SPEAKER
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- Some of the 8580 Models 111 and 311 may generate noise through the
- computer's speaker (such as crakling or beeping) after a math
- coprocessor is installed. This is not caused by the Intel Math
- CoProcessor. It is a problem with the system board. The following
- machines can have the problem:
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- 8580 Model 111, with serial numbers below 6019000
- 8580 Model 311, with serail numbers below 6502022
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- February 25, 1991 Intel FaxBack # 3062 Page 2
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- ╔═════════════════════════════════════════════════════════════════════════╗
- ║ ║
- ║ INTEL MATH COPROCESSOR HARDWARE TROUBLESHOOTING ║
- ║ ║
- ╚══════════════════════════════ (continued) ══════════════════════════════╝
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- IBM PS/2 MODEL 80 & 387DX & INTERMITTENT LOCKUPS
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- The 8580 may hang under certain conditions. All 8580 models can be
- affected, but it will only appear under certain operating
- conditions. If the system is having this problem and does not a
- part number of p/n 33F8416 or p/n 33F8415 the system board should
- be replaced. The models 041 and 071 use the 33F8416, and models
- 111 and 311 use p/n 33F8415 as replacement system boards.
-
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- INTEL MATH COPROCESSOR POWER CONSUMPTION
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- ┌─────────────┬───────────┬────────────────────────┐
- │ Intel Math │ Maximum │ Temperature extremes │
- │ CoProcessor │ Wattage │ │
- ╞═════════════╪═══════════╪════════════════════════╡
- │ 8087 │ 3 watts │ │
- │ 80287 │ 3 watts │ 0 deg C to 85 deg C │
- ├─────────────┼───────────┼────────────────────────┤
- │ 287XL │ 1.5 watts │ │
- │ 387DX │ 1.5 watts │ -65 deg C to 110 deg C │
- ├─────────────┼───────────┼────────────────────────┤
- │ 387SX │ 1.5 watts │ 0 deg C to 85 deg C │
- └─────────────┴───────────┴────────────────────────┘
-
- These are worst case estimates. Typical consumptions are somewhat
- less. For customers concerned about heat, the max operating
- temperature rating is much higher than what would ever be seen in
- a computer chassis.
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- REMOVING 80287 FROM PC/AT (ERROR MESSAGE)
-
- After removing a math coprocessor from an IBM PC AT computer, you
- must rerun your computer's SETUP program. If you still receive an
- error message because the computer can't find the chip, you may
- have to temporarily unplug the battery from the system board. All
- SETUP information will be lost, so be sure to write down the hard
- drive type, floppy drive type, memory and video configurations
- before unplugging the battery. This information is critical in
- correctly reconfiguring your computer.
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- ═══════════════════════════════════════════════════════════════════════════
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- February 25, 1991 Intel FaxBack # 3062 Page 3
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