IBM 220, Руководство по обслуживанию, Страница: 33 / 68

Step 1: Power and Fan
This step verifies whether the power and the fan operate properly.
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the products that attach to the system. It is the
customer’s responsibility to ensure that the outlet is correctly wired and
grounded to prevent an electrical shock. (RSFTD201)
1. Make sure that the 7206 Tape Drive power cable is plugged into an electrical
outlet.
2. Make sure that the 7206 Tape Drive power is on by checking that:
v
The power-on light is on.
v
There is airflow from the fan at the rear of the unit.
Is the power-on light on and is there airflow from the fan?
NO
While watching for the power-on light to come on, press the power switch
again. Repeat this procedure several times. If the power-on light fails to
come on or there is no airflow from the fan, go to Step 2: Electrical Outlet
Voltage.
YES Go to Step 7: SCSI Address Switch.
Step 2: Electrical Outlet Voltage
This step tests the voltage at the electrical outlet.
1. Do a controlled system shutdown (refer to the instructions in Chapter 2,
“Setting Up the 7206 Tape Drive,” in the 7206 Model 220 4mm Tape Drive Setup
and Operator Guide).
2.
Ensure that the power to the system unit is off.
3. Press the 7206 Tape Drive power switch to turn off the power.
4.
Unplug the 7206 Tape Drive power cable from the electrical outlet and from the
7206 Tape Drive.
DANGER
Dangerous voltage being measured. (RSFTD005)
5.
Check the electrical outlets for proper voltage.
Is the voltage from the electrical outlet correct?
NO Contact your service personnel for further instructions.
YES Go to Step 3: Power Cable.
Chapter 3. Maintenance Analysis Procedures
19