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IBM 5160 motherboard  -  Component temperature

NOTE:

Temperatures shown below are crudely indicative only. See note 1.

NOTE:

Only sometimes (repeat: sometimes), are faulty chips very signifcantly hotter than normal. It depends on the nature of the fault (the failure mode).

The heat image and other readings were taken:
• using a HIKMICRO Pocket2 thermal camera; and
• after the motherboard had been powered on for about an hour.

A power supply is the only thing connected to the motherboard.

Ambient temperature (i.e. temperature of surrounding air) was about 18° to 20° Celcius.

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16KB-64KB:  One of my IBM 5160 motherboards of type 64-256KB

BIOS Revision:  xxxxxxxxxxxx

In decending temperature xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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64KB-256KB:  One of my IBM 5160 motherboards of type 64KB-256KB

BIOS Revision:  05/09/86

In decending temperature NEC D8237AC-5:  About 59° Celcius Intel D8288:  About 54° Celcius Mitsubishi M5L8253P-5:  About 53° Celcius AMD D8284A:  About 50° Celcius U11 (SN74S373N):  About 47° Celcius Mitsubishi M5L8259AP:  About 46° Celcius AMD D8088:  About 45° Celcius Mitsubishi M5L8255AP-5:  About 43° Celcius

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Note 1

• Do an Internet search for factors that affect temperature readings on a thermal camera. • The surrounding air temperature is expected to affect chip surface temperature. • Different makes of a chip could emit different levels of heat (because the circuitry inside the chip might be different). • Due to the motherboard design, the same make-model of a chip in socket {XXX} could emit a different level of heat to that in socket {YYY}.