IBM 7208 Model 345, Руководство по обслуживанию

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7. On the power supply connector J2 (see Figure 10), check that the +12V signal
falls between a minimum of +11.5 volts and a maximum of +12.6 volts.
Are the voltages good, and does the power-on light come on and stay on?
NO Replace the power supply, and then return to Step 4. Refer to “Removing
and Replacing the Power Supply” on page 28.
YES Go to Step 6.
Step 6
This step examines the cooling fan as the possible source of the problem.
1. Press the power switch to turn off the power.
2.
Reconnect the power supply connector (J2) to the cooling fan.
3. Press the power switch to turn on the power.
Does the power-on light come on and stay on, and is there airflow from the fan?
NO Replace the cooling fan, then return to Step 6. Refer to “Removing and
Replacing the Cooling Fan” on page 30.
YES Go to Step 7.
Step 7
This step examines the drive as the possible source of the problem.
1.
Press the power switch to turn off the power.
2. Reconnect the power supply connector (J2) to the drive.
3. Press the power switch to turn on the power.
Does the power-on light come on and stay on, and is there airflow from the fan?
NO Replace the drive, then return to Step 7. Refer to “Removing and Replacing
the Drive” on page 27.
YES Go to Step 8.
Figure 10. Power Supply Connector J2
Chapter 3. Maintenance Analysis Procedures
21