Specifications

Chapter 4: Troubleshooting
Power Supply Troubleshooting
52
To locate all four sets of LEDs, remove the handle, outer oscilloscope cover, and inner
top cover to expose the motherboard cavity and top edges of the backplane assembly.
The first set of LEDs is located in the upper right corner of the backplane assembly
(see Figure 4- 5). Six of the LEDs indicate an under-voltage fault, and four indicate an
over- temperature fault. Another LED in this group is BULK SUPPLY FAIL, located
below NEG SUPPLY FAIL. It lights up if the bulk supply needs replacing.
Figure 4-5 Under-voltage, over-temperature, and bulk supply indicator LEDs on backplane assembly