Step 4
(from Step 3)
1. Start with the device or drawer farthest to the top in the rack. Set the power
switch of the device or drawer to the On position.
2. Measure for -40 to -60 V DC on terminal board 2 (TB2) between positions one
and two (side A circuit breakers) and between positions five and six (side B
circuit breakers).
Is the voltage between -40 and -60 V dc?
NO Repeat this step until the power switch of all the devices and drawers in
the rack are set to the On position.
Go to Step 5.
YES Go to the startup MAP for the disk-drive-subsystem installed in your rack.
Chapter 5. Maintenance Analysis Procedures (MAPs) 5-7
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