Lenovo PC 300PL Technical Information Manual 6275, 6285 - Page 28

Jumper, Riser Card, Type 6285/6892, Floppy Device Access Switch 8

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Chapter 2. System-Board Features Switch 8 controls writes to the diskette drive. Figure 9. Floppy Device Access (Switch 8) Write enabled (factory default) Off Write protected On Jumper Jumpers on the system board are used for custom configurations. For the location of the Clear CMOS Request jumper, refer to the "System Board, Types 6862/6892 and 6275/6285" on page 14, above.. Figure 10. Clear CMOS Request Jumper (J9) Pins 1 and 2 2 and 3 Description Normal (Factory default) Clear CMOS/Password Riser Card, Type 6285/6892 The riser card in your computer has three dedicated ISA slots and three dedicated PCI slots. The following illustration shows the expansion slots and connectors on the riser card. ISA ISA ISA PCI PCI PCI CD Audio 340-Pin Connector Power Diskette Drive Disk Fan A Disk Fan B Fan Alert on LAN Wake on LAN Asset ID Antenna ChassisIntrusion Detector Primary IDE LED Panel Secondary IDE SCSI Hard Disk LED Internal Speaker Modem Wakeup The riser card plugs into the system board via a 340-pin connector. Adapters plug into the ISA- or PCI-expansion connectors (slots) on the riser card. Signals from adapters are routed to the ISA or PCI buses. Each ISA-expansion connector provides a 16-bit-wide data path, and each PCI-expansion connector provides a 32-bit-wide data path. Shared slots will accommodate either an ISA adapter installed in the ISA connector, or a PCI adapter installed into the PCI connector. Shared slots cannot accommodate ISA and PCI adapters at the same time. Note: The front fan is thermally controlled by the System Management Controller. The front fan for most configurations will be on for a short period of time, then will be turned off when the temperature of the system is controlled. 16 Technical Information Manual

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Chapter 2.
System-Board Features
Switch 8 controls writes to the diskette drive.
Jumper
Jumpers on the system board are used for custom configurations.
For the location of the Clear CMOS
Request jumper, refer to the “System Board, Types 6862/6892 and 6275/6285” on page
14, above..
Riser Card, Type 6285/6892
The riser card in your computer has three dedicated ISA slots and three dedicated PCI slots.
The
following illustration shows the expansion slots and connectors on the riser card.
Fan
Modem
Wakeup
PCI
PCI
PCI
ISA
ISA
ISA
340-Pin
Connector
SCSI
Hard Disk
LED
Wake on LAN
Alert
on LAN
Asset ID
Antenna
Chassis-
Intrusion
Detector
Internal
Speaker
CD
Audio
LED
Panel
Primary
IDE
Secondary
IDE
Diskette
Drive
Power
Disk
Fan A
Disk
Fan B
The riser card plugs into the system board via a 340-pin connector.
Adapters plug into the ISA- or
PCI-expansion connectors (slots) on the riser card.
Signals from adapters are routed to the ISA or PCI
buses.
Each ISA-expansion connector provides a 16-bit-wide data path, and each PCI-expansion
connector provides a 32-bit-wide data path.
Shared slots will accommodate either an ISA adapter installed in the ISA connector, or a PCI adapter
installed into the PCI connector.
Shared slots cannot accommodate ISA and PCI adapters at the same
time.
Note:
The front fan is thermally controlled by the System Management Controller.
The front fan for most
configurations will be on for a short period of time, then will be turned off when the temperature of the
system is controlled.
Figure 9. Floppy Device Access (Switch 8)
Write enabled (factory default)
Off
Write protected
On
Figure 10. Clear CMOS Request Jumper (J9)
Pins
Description
1 and 2
Normal (Factory default)
2 and 3
Clear CMOS/Password
16
Technical Information Manual