Sun Microsystems Sun Blade 1000 Service Manual page 111

This section describes how to use a digital volt meter (DVM) to test the power
supply under an operational load. See
power connectors.
1. Power off the workstation and remove the access panel.
See Chapter 5.
Caution – Use proper ESD grounding techniques when handling workstation
components. Wear an antistatic wrist strap and use an antistatic mat. Store ESD-
sensitive components in antistatic bags before placing them on any surface.
2. Defeat the interlock.
The interlock switch can be defeated by mechanically closing the switch while the
access cover is removed from the workstation.
Caution – Hazardous voltages are present. To reduce the risk of electrical shock and
danger to personal health, follow the instructions.
3. Power on the workstation.
4. Using a DVM, check the power supply output voltages.
See Appendix B and for power supply connector descriptions.
Note – All power supply connectors being tested must remain connected to the
motherboard.
a. With the negative probe of the DVM placed on a connector ground (Gnd) pin,
position the positive probe on each power pin.
b. Verify voltage and signal availability as listed in the voltage-pin tables.
5. If any power pin signal is not present with the power supply active and properly
connected to the motherboard, replace the power supply.
to identify the J3601 and J3603
FIGURE 4-1
Chapter 4 Troubleshooting Procedures 4-7