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Step 4
This step prepares the 7208 Tape Drive to determine whether the power supply,
fan, or tape drive is the cause of the problem.
1.
Remove the cover of the 7208 Tape Drive. Refer to “Removing and Replacing
the Cover” on page 26.
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.
Plug the 7208 Tape Drive power cable into the 7208 Tape Drive and into a
grounded electrical outlet.
5.
Press the 7208 Tape Drive power switch to turn on the power.
Does the power-on light come on and stay on?
NO
Replace the power supply, then go to Step 5. Refer to “Removing and
Replacing the Power Supply” on page 28.
YES
Go to Step 5.
Step 5
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 9), check the following:
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
Figure 9. Power Supply Connector J1
20
7208 Model 345 Service Guide
Содержание 7208 345
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