Sun Microsystems Sun Ultra 60 Service Manual page 51

b. Verify voltage and signal availability as listed in Table 4–2, Table 4–3, and
Table 4–4.
6. If any power pin signal is not present with the power supply active and
properly connected to the motherboard, replace the power supply.
1 2 3 4 5
Figure 4–1 Power Supply Connector J2901
Power Supply Connector J2901 Pin Description
TABLE 4–2
Pin Description
1 Rtn
2 +3.3 Vdc SENSE
3 Rtn
4 +5.0 Vdc SENSE
5 POWER SET0 NEG
6 +3.0 Vdc SENSE
7 POWER 0V
8 POWER SET0 POS
Figure 4–2 Power Supply Connector J2902
6 7 8 9 10 11
Pin
9
10
11
12
13
14
15
16
12 13 14 15 16
Description
SUPPLY TRIP L
POWERON L
-12 Vdc
POWER OK
Gnd
+12 Vdc
Rtn
+12 Vdc
Troubleshooting Procedures
4-5