3.12 Step 10
This step checks the power supply voltage levels as the possible source of the problem.
1. Press the power switch to turn off the power.
2. Disconnect the power supply connector (J1) from the drive.
3. Disconnect the power supply connector (J2) between the power supply and the cooling fan.
4. Connect the power cable to both the 7208 Tape Drive and to the electrical outlet.
5. Press the power switch to turn on the power.
6. On the power supply connector J1 (see Figure 17), check the following:
The +12V signal falls between a minimum of +11.5 volts and a maximum of +12.6 volts
The +5V signal falls between a minimum of +4.8 volts and a maximum of +5.25 volts
Figure 17. Power Supply Connector J1
7. On the power supply connector J2 (see Figure 18), check that the +12V signal falls between a minimum of +11.5 volts and a maximum
of +12.6 volts.
Figure 18. Power Supply Connector J2
Are the voltages good, and does the power-on light come on and stay on?
NO Replace the power supply. Refer to "Removing and Replacing the Power Supply" in topic 4.4.
YES Replace the drive. Refer to "Removing and Replacing the Drive" in topic 4.3.
7208 Tape Drive Service Guide
Step 10
¦ Copyright IBM Corp. 1998
3.12 - 1
