Agilent Technologies 16900A - Page 122

122 16900A, 16902A, and 16903A Service Guide
8 Theory of Operation
• Voltage rail monitor (more on page 126)
• Overtemp monitor (more on page 127)
• Fan control (more on page 127)
I/O board
The I/O board subsystem includes:
• Target control port (more on page 127)
• Trigger IN/OUT (more on page 127)
• Clock IN (more on page 128)
• Calibration OUT (more on page 128)
PLD
FAN CONTROL
OVERTEMP
MONITOR
VOLTAGE RAIL
MONITOR
POWER
CONNECTORS (3)
POWER SENSE
CONNECTOR
CPU POWER
CONNECTOR
IDE BUS
CONNECTOR
CDRW DRIVE
CONNECTOR
FRONT PANEL
CONNECTOR
PCI BOARD
CONNECTOR
IO FPGA
MODULE
CONNECTORS
(3)
FAN
CONNECTORS
TO PWR PLANES
TO PWR PLANES
POWER SWITCH
CONNECTOR
CPU PWR SWITCH
CONNECTOR
MODULE FPGA
IO BOARD
CONNECTOR
VIDEO CIRCUIT