Service manual

C-32 Sun Ultra 2 Series Service Manual • July 1996
Note – After reprogramming the system flash PROMs, verify that the flash PROM
Write Protect/Enable jumper (J2203) is set to the Write Protect position to ensure
system security.
C.5.3 Additional Motherboard Jumper Blocks
Additional motherboard jumper blocks are identified in the following table and are
listed for information purposes only.
Note – Do not attempt to add jumpers to jumper blocks identified in the following
table.
TABLE C-8 Flash PROM Jumper Settings
Jumper Pins 1 + 2 Select Pins 2 +3 Select Default Jumper on Pins Signal Controlled
J2202 Flash PROM Not to be used 1 + 2 FLASH PROM SEL
J2203 Write protect Write enable 1 + 2 FLASH PROM
PROG ENABLE
J2204 High half booting Normal booting 2 + 3 XOR LOGIC SET
TABLE C-9 Additional Motherboard Jumper Blocks
Jumper Block ID Description
J2103 Enable test edge serial ports enable (manufacturing only)
J2201 External reset: jumper pin 1 to pin 2 to force XIR reset; jumper pin
2 to pin 3 to force POR reset
J2202 Manufacturing ROMBO connector
J2203 Manufacturing JTAG/Scan test connector
J3402 Enable test edge ethernet port (manufacturing only)
J3403 Enable test edge ethernet port (manufacturing only)