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2. Install the cable according to the routing and cable management instructions
provided in the table.
Each cable connector is keyed so that it can be connected in only one way.
5.5.3 Cable Connectors and Routing
Cable Name Connections Routing and Management
CPU power
sense cable
From: Power distribution board
(J0205) and (J0206)To: Main logic
board (J2901)
Routed from under the fan tray
assembly to the main logic board
Main power
cable
From: Power distribution board
(J0201) and (J0207)To: Main logic
board (J2902) and (J2903)
Routed from under the fan tray
assembly to the main logic board
I/O power cable From: Power distribution board
(J0210)To: UltraSCSI backplane
(J0101) andTo: Removable media
assembly power connector
Routed from under the fan tray
assembly, through the notch on the
fan tray assembly to the UltraSCSI
backplane and the RMA power
connector
UltraSCSI data
cable
From: Main logic board (J1801)To:
UltraSCSI backplane (J0102)
Routed flat under the tab on the
side of the fan tray assembly
Removable
media SCSI
cable
From: UltraSCSI backplane
(J0302)To: RMA SCSI Connector
Routed from the UltraSCSI
backplane to the removable media
assembly SCSI connector
Keyswitch/
power button/
LED cable
From: Power distribution board
(J0500)To: Front of chassis
Routed under the notch on the fan
tray assembly
CPU core
voltage power
cable
From: Power distribution board
(J0202)To: DC-to-DC board (J0103)
Routed from the power distribution
board to the DC-to-DC board
CPU core
voltage power
sense cable
From: Power distribution board
(J0203)To: DC-to-DC board (J0102)
From the power distribution board
to the DC-to-DC board
156 Sun Enterprise 220R Server Service Manual ♦ January 2000, Revision A