Step 1: Power And Fan; Step 2: Electrical Outlet Voltage - IBM 220 Service Manual

Step 1: Power and Fan

This step verifies whether the power and the fan operate properly.
DANGER
1. Make sure that the 7206 Tape Drive power cable is plugged into an electrical
2. Make sure that the 7206 Tape Drive power is on by checking that:
Is the power-on light on and is there airflow from the fan?
NO
YES

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,
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
DANGER
5. Check the electrical outlets for proper voltage.
Is the voltage from the electrical outlet correct?
NO
YES
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)
outlet.
v The power-on light is on.
v There is airflow from the fan at the rear of the unit.
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.
Go to Step 7: SCSI Address Switch.
"Setting Up the 7206 Tape Drive," in the 7206 Model 220 4mm Tape Drive Setup
and Operator Guide).
7206 Tape Drive.
Dangerous voltage being measured. (RSFTD005)
Contact your service personnel for further instructions.
Go to Step 3: Power Cable.
Chapter 3. Maintenance Analysis Procedures
19