Intermittent isolation procedures
These procedures help you to correct an intermittent problem.
DANGER
When working on or around the system, observe
the following precautions:
Electrical voltage and current from power, telephone,
and communication cables are hazardous. To avoid a shock hazard:
- Connect power to this unit only with the IBM provided
power cord. Do not use the IBM provided power cord
for any other product.
- Do not open or service any power supply assembly.
- Do not connect or disconnect any cables or perform installation, maintenance,
or reconfiguration of this product during an electrical storm.
- The product might be equipped with multiple power cords. To remove all
hazardous voltages, disconnect all power cords.
- Connect all power cords to a properly wired and grounded electrical outlet.
Ensure that the outlet supplies proper voltage and phase rotation according
to the system rating plate.
- Connect any equipment that will be attached to this product to properly
wired outlets.
- When possible, use one hand only to connect or disconnect signal cables.
- Never turn on any equipment when there is evidence of fire, water, or
structural damage.
- Disconnect the attached power cords, telecommunications systems, networks,
and modems before you open the device covers, unless instructed otherwise
in the installation and configuration procedures.
- Connect and disconnect cables as described in the following procedures
when installing, moving, or opening covers on this product or attached devices.
To
Disconnect:
- Turn off everything (unless instructed otherwise).
- Remove the power cords from the outlets.
- Remove the signal cables from the connectors.
- Remove all cables from the devices
To Connect:
- Turn off everything (unless instructed otherwise).
- Attach all cables to the devices.
- Attach the signal cables to the connectors.
- Attach the power cords to the outlets.
- Turn on the devices.
(D005)
Use these procedures to correct an intermittent problem, if other problem
analysis steps or tables sent you here. Only perform the procedures that apply
to your system.
Read all safety procedures before servicing the system. Observe all safety
procedures when performing a procedure. Unless instructed otherwise, always
power off the system or expansion unit where the FRU is located. See Powering on and powering off before removing, exchanging, or installing
a field-replaceable unit (FRU).
Use the procedure below to identify intermittent problems and the associated
corrective actions.
- Related tasks
- INTIP03
Use this procedure to isolate problems with external noise on AC voltage lines.
- INTIP05
Use this procedure to isolate problems with external noise on twinaxial cables.
- INTIP07
Use this procedure to lessen the effects of electrical noise (electromagnetic interference, or EMI) on the system.
- INTIP08
Use this procedure to ensure that the system is electrically grounded correctly.
- INTIP09
Use this procedure to check the AC electrical power for the system.
- INTIP14
Use this procedure to isolate problems with station protectors.
- INTIP16
Use this procedure when you need to copy a main storage dump to give to your next level of support.
- INTIP18
Use this procedure to determine if one or more PTFs are available to correct this specific problem.
- INTIP20
Use this procedure to analyze system performance problems.
- INTIP24
Use this procedure to collect data when the service processor reports a suspected intermittent problem.