Troubleshooting
Problem
Specifications (Power Supply to Power Distribution Board Interface) DC Power Connectors from Power Supply to J9A, J9B, J9C on Backplane
Resolving The Problem
Specifications (Power Supply to Power Distribution Board Interface)
DC Power Connectors from Power Supply to J9A, J9B, J9C on Backplane
| Pin Position | Description |
| 1,6 | Ground |
| 7 | +3.3 Vdc |
| 8 | +12 Vdc |
| 9 | -12 Vdc |
| 10 | -5 Vdc |
| 11, 12 | +5.1 Vdc |
| 13, 17 | Ground |
| 18, 19 | +3.3 Vdc |
| 20, 21 | +12 Vdc |
| 22, 24 | +5.1 Vdc |
Power Control and Status Signals from Power Supply to J8A, J8B, J8C on Backplane
| Pin Position | Description |
| 1 | +5.1 Vdc remote sense (+) |
| 2 | + 12 Vdc remote sense (+) |
| 3 | +3.3 Vdc remote sense (+) |
| 4 | Ground remote sense (-) |
| 5 | +5 Vdc load share |
| 6 | +12 Vdc load share |
| 7 | +3.3 Vdc load share |
| 8 | PON |
| 9 | Vbias |
| 10 | +5 V standby |
| 11 | FAULT |
| 12 | Ground |
| 13 | Power-Good |
| 14, 15 | Not connected |
Power Backplane (J6 and J7), Power to System Board
J9 and J10 have identical pinouts, and their connection to the baseboard is interchangeable.
| Pin Position | Signal |
| 1 | +5V |
| 2 | Ground |
| 3 | +5V |
| 4 | Ground |
| 5 | +5V |
| 6 | Ground |
| 7 | +5V |
| 8 | Ground |
| 9 | +5V |
| 10 | Ground |
| 11 | +12V |
| 12 | Ground |
| 13 | +12V |
| 14 | Ground |
| 15 | +3.3V |
| 16 | Ground |
| 17 | +3.3V |
| 18 | Ground |
| 19 | +3.3V |
| 20 | Ground |
Power Backplane (J11), Power Control Signal to System Board
| Pin Position | Signal |
| 1 | -12 Vdc |
| 2 | -5 Vdc |
| 3 | Power-on |
| 4 | I C_SDA |
| 5 | I C_SCL |
| 6 | +5V remote sense (+) |
| 7 | +12V remote sense (+) |
| 8 | +5V standby |
| 9 | Ground |
| 10 | Power-good |
| 11 | Ground |
| 12 | I C_PRES |
| 13 | +3.3V remote sense (+) |
| 14 | Ground remote sense (-) |
Power Backplane (J1, J2), to SCSI Drive Backplane (J10)
| Pin Position | Signal |
| 1, 3 | +12Vdc |
| 4, 9 | Ground |
| 10, 12 | +5Vdc |
Power Backplane, I C Input Definitions
The power supply backplane has a single I2 C device to detect status and presence
from each power supply. The device is connected through the power control signal
connectors J11 and J10 to the I2 C circuit on the system board and the SCSI hard drive backplane.
The address of the device is 44h.
Power Backplane (J3, J4, J5), Power to System Peripherals
| Pin Position | Description |
| 1 | +12 Vdc |
| 2,3 | Ground |
| 4 | +5.1 Vdc |
Power Backplane Fan Connections (J12, J13)
| Pin Position | Description |
| 1 | Ground |
| 2 | +12 Vdc Channel B |
| 3 | Fan fail |
Specifications (Power Supply)
| Description | Specification |
| DC power | +3.5 V @ 15 A +5.1 V @ 32 A +12 V @ 16 A -5V @ 0.25 A -12 V @ 1 A 5 V standby @ 100 mA |
| AC line voltage (autoranging) | 100-120 V ac 200-240 V ac |
Current Sharing Maximum Output per Voltage
| Number of supplies |
+3.3V | +5V | +12V | -5V | -12V |
| 1 | 15A | 32A | 16A | 0.25A | 1A |
| 2 | 28A | 60A | 30A | 0.25A | 1A |
| 3 (redundant) | 28A | 60A | 60A | 0.25A | 1A |
Document Location
Worldwide
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Document Information
Modified date:
23 January 2019
UID
ibm1DDSE-44APDA