IBM 7212 102 User Manual

Step 4
This step performs a visual and physical check in an attempt top fix the problem.
1. Do a controlled system shutdown (refer to the instructions in the 7212 Model
102 Storage Device Enclosure Setup and Operator Guide).
2. Ensure that the power to the host is off.
3. Turn off the power to the 7212 Storage Enclosure.
4. Unplug the 7212 Storage Enclosure from the electrical source.
5. Perform the cover removal procedure. Refer to “Removing and Replacing the
Cover” on page 28.
6. Visually inspect all of the internal components in the enclosure. Look for any
signs of wear, damage, contamination, or excessive heat.
7. Physically check each cable connection and ensure all cables are fully seated
and secured.
Are their any signs of damage, wear, or loose cables?
NO Plug the enclosure into an electrical source and press the power On
switch to determine if the connection inspection fixed the problem.
If the enclosure does not power on, go to Step 5. If the enclosure
powers on and appears to run normally, reassemble the enclosure,
and then return to Step 1.
YES Replace the damaged component or reseat the cable, reassemble
the enclosure and then return to Step 1.
Step 5
This step checks the Power On/Off switch to determine if this is the source of the
problem.
1. Unplug the 7212 Storage Enclosure from the electrical source.
2. Press the power switch on the enclosure to determine whether it latches in the
On or In position.
3. Unplug the power switch cable from the power supply and test the electrical
continuity of the cable pins, as illustrated in Table 7.
Table 7. Power Switch Cable Pin Continuity
Power button
position
Continuity between
cable pins 1 and 2
Continuity between
cable pins 3 and 4
Continuity between
other cable pin pairs
Off (out) Open Circuit Open Circuit Open Circuit
On (in) Continuity Continuity Open Circuit
Does the power switch latch in the On position and support the continuity as
shown in Table 7?
NO Adjust the power switch bracket to ensure the button moves freely
in the chassis hole. If the power button does not latch in the On
position or if the cable does not have continuity, replace the power
switch assembly (see “Removing and Replacing the Power Switch
Assembly” on page 36), reassemble the enclosure, and then return
to Step 1.
YES Reassemble the power switch assembly and then go to Step 6.
Chapter 2. Maintenance Analysis Procedures 15

IBM 7212 102 Specifications

General

Brand	IBM
Model	7212 102
Category	Storage
Language	English