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: Powerdistribution 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: Powerdistribution board
(J0201) and (J0207)To:Main logic
board (J2902) and (J2903)
Routed from under the fan tray
assembly to the main logic board
I/Opower cable From: Powerdistribution 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: Mainlogic board (J1801)To:
UltraSCSI backplane (J0102) Routedflat under thetab on the
side of the fan tray assembly
Removable
media SCSI
cable
From: UltraSCSIbackplane
(J0302)To: RMA SCSI Connector Routedfrom the UltraSCSI
backplane to the removable media
assembly SCSI connector
Keyswitch/
power button/
LED cable
From: Powerdistribution board
(J0500)To:Front of chassis Routed under the notchon the fan
tray assembly
CPU core
voltage power
cable
From: Powerdistribution board
(J0202)To:DC-to-DC board (J0103) Routedfrom the power distribution
board tothe DC-to-DC board
CPU core
voltage power
sense cable
From: Powerdistribution 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