Step 10: Power Supply Voltage Level - IBM 220 Service Manual

Step 10: Power Supply Voltage Level

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. Perform the cover removal procedure. Refer to "Removing and Replacing the
3. Disconnect the power supply connector (J1) from the drive.
4. Disconnect the power supply connector (J2) between the power supply and the
5. Connect the power cable to both the 7206 Tape Drive and the electrical outlet.
6. Press the power switch to turn on the power.
DANGER
7. On the power supply connector J1 (see Figure 8), check the following:
Figure 8. Power Supply Connector J1
8. On the power supply connector J2 (see Figure 9), check that the +12V signal
Figure 9. Power Supply Connector J2
Are the voltages good?
NO
YES
Cover" on page 28.
cooling fan.
Dangerous voltage being measured. (RSFTD005)
v The +12V signal falls between a minimum of +11.5 volts and a maximum of
+12.6 volts
v The +5V signal falls between a minimum of +4.8 volts and a maximum of
+5.25 volts
falls between a minimum of +11.5 volts and a maximum of +12.6 volts.
Replace the power supply. Refer to "Removing and Replacing the Power
Supply" on page 32.
Replace the drive. See "Removing and Replacing the Drive" on page 30.
Note: If the media is still in the drive being replaced, it can be removed
manually. See "Manually Removing a Tape Cartridge" on page 35.
Chapter 3. Maintenance Analysis Procedures
23