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Sun 420R System Board
Sun Part Number 501-5168
Sun Original Product.
 Jumper Settings| JUMPER | PINS | SETTING | DESCRIPTION |
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| J0102 | 2-3 | In | Bypass CPU0 in scan chain | | J0202 | 2-3 | In | Bypass CPU1 in scan chain | | J0302 | 2-3 | In | Bypass CPU2 in scan chain | | J0402 | 2-3 | In | Bypass CPU3 in scan chain | | J2804 | 1-2
2-3 | In
In | RS-232 +12Vdc
RS-423 (default) | | J2805 | 1-2
2-3 | In
In | RS-232 -12Vdc
RS-423 (default) | | J3001 | 1-2
2-3 | In
In | FPROM write protected (default)
FPROM write enabled | | J3002 | 1-2
2-3 | In
In | Select Flash PROM (default)
Select ROMBO | | J3102 | 1-2
2-3 | In
In | FPROM high half booting
FPROM low half booting (default) | | J3201 | 1-2
2-3 | In
In | ÷3 mode (360MHz)
÷4 mode (400MHz/450MHz) | | J3202 | 2-3 | In | (on -07/08 FAB, removed from -09) | | J3705 | 1-2
2-3 | In
In | QAM WGS- to SPEAKER OUT- (default)
QAM WGS- to POWERON_L | | J3706 | 1-2
2-3 | In
In | QAM WGS+ to SPEAKER OUT+ (default)
QAM WGS+ to SUPPLYTRIP_L |
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Module Slot Numbering| SOCKET | INSTALL | UPA | OBP/OS |
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| J0401 | 3rd | UPA 3 | CPU 3 | | J0301 | 1st | UPA 2 | CPU 2 | | J0201 | 2nd | UPA 1 | CPU 1 | | J0101 | 4th | UPA 0 | CPU 0 |
PCI Slot Numbering| SLOT | BUS | DEVICE TREE |
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| 4 | B | pci@1f,4000/*@5,* | | 3 | B | pci@1f,4000/*@2,* | | 2 | B | pci@1f,4000/*@4,* | | 1 | A | pci@1f,2000/*@1,* |
PCI Bus B shares the address/data bus with on-board Audio, Ethernet, Flash, Floppy, Keyboard, Mouse, NVRAM, Parallel, SCSI, and Serial devices.Miscellaneous Connectors| CONNECTOR | PINS | DESCRIPTION |
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| J2801 | 1-8 | Serial test (factory use) | | J2802 | 1-32 | ROMBO (factory use) | | J3101 | 1-2
2-3 | Button XIR (factory use)
Button POR (factory use) | | J3103 | 1-8 | JSCC (factory use) | | J4105 | 1-18 | DC-DC Converter | | J4106 | 1-14 | Power Supply sense | | J4107 | 1-28 | Power Supply +3.3V and +5V | | J4108 | 1-10 | DC-DC converter | | J4109 | 1-2 | Fan power | | J4110 | 1-2 | Fan power | | J4111 | 1-8 | Interlock, LED, speaker, and power switch | | J4112 | 1-10 | DC power to internal peripherals |
Notes- The minimum OS is 2.5.1 HW: 11/97, 2.6 HW: 5/98, or 7 HW: 8/99.
- The flash PROM is soldered to the system board.
- Use the Flash PROM Programming Utility to update the flash PROM.
- 64-Bit PCI boards do not fit into Slot 4. Connector J3601 interferes with the 64-Bit PCI extension connector.
- DC-DC Converter 300-1407 connects to J4105 and J4108 on the system board.
SCSI Bus Notes- The internal SCSI bus is controlled by /pci@1f,4000/scsi@3.
- The external SCSI bus is controlled by /pci@1f,4000/scsi@3,1.
Memory Notes- DIMMs are required on both the Riser Board and the System Board.
- Every populated bank must contain four same-size DIMMs. Four same-size DIMMs are a "quad".
- To activate 2-way interleaving, quads must be installed in banks 0 and 1, which are non-adjacent banks.
(A third quad may be installed in either remaining bank, but that will disable interleaving.) - To activate 4-way interleaving, all four banks must be populated with quads.
- Each bank addresses 1GB of memory.
- Damage to the Mictor Connectors can occur if DIMMs are installed or removed when the Riser Board is installed on the System Board.
Sun original product.
All items tested by our experienced team of technicians and pulled from working systems.
Item is refurbished with 90 days warranty, extended warranty options available.
Sameday and next day delivery available.
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Features
Compatible with the following Sun systems:
Ultra 80
Enterprise 420R
Netra t 1400
Netra t 1405
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