Record number:       H163493
   Device:              D/T6862
   Model:               M
   Hit count:           UHC00004
   Success count:       USC0000
   Publication code:    PC50
   Tip key:             001
   Date created:        O98/04/27
   Date last altered:   A98/05/08
   Owning B.U.:         USA

 Abstract:  FAN SPEED VARIES OR STOPS/STARTS IN PC300PL, 6862/6892


 TEXT:
 Users may become aware that during the normal operation of
 IBM PC300PL Series 6862/6892 systems that the cooling fans
 may either vary their speed (RPM), or stop and restart
 automatically.

 This tip also applies to Netfinity 3000 Type 8476 systems.

 The following text, "System-Management Controller" (p. 44) is
 found in the "Using Your Personal Computer" booklet included
 with each system and addresses this feature:

   "SYSTEM-MANAGEMENT CONTROLLER

   Note: The following information is for some PC300PL only.

   Your computer is  equipped with a system-management
   controller (LM80) integrated with the system board. This
   controller provides hardware monitoring for system-board
   temperatures, fan speed, power supply and processor voltages,
   and the detection of the removal of the computer cover (see
   Chassis-Intrusion Detector).

   Used with the DMI BIOS of the computer, the system-monitor
   controller can also store the hardware test results from the
   power-on self-test (POST)."

 End users, support personnel, and servicers should be aware
 that this is a normal operating feature of the system and
 does not indicate a hardware malfunction.

 NOTE: The cooling fan contained in the power supply is a
       variable 2-speed fan and should always be in operation.

 SAS KEYWORDS:
    CDT                CDTOPER            D/T6862            D/T6892
    6862               6892               UNCLASSIFIED       NETFINITY 3000
    D/T8476            8476