IBM 7133 Series, Service Manual

Page: 131 / 230

|
Step 8
| (from step 7 on page 2-2330-9)
| One of the following conditions exists:
| The light output from this Fibre-Optic Extender is low.
| The fiber optic cables are failing.
| 1. Use the wrap adapter
1
to wrap (connect) the two fiber optic cables
2
together.
| 2. Check the Receive light of the Fibre-Optic Extender that is at the other end of the
| optical link.
| Is the Receive light on?
| NO | A fiber optic cable has failed. Tell the customer.
| YES | The Fibre-Optic Extender that is disconnected from the fiber optic cables has
| failed.
| 1. Remove the wrap cable from the Fibre-Optic Extender, and do whichever
| of the two following actions is appropriate:
| If the wrap cable is 400 mm (15 in.) long, connect each of its ends to
| the wrap adapter to make a closed loop.
| If the wrap cable is 150 mm (6 in.) long, connect one end to the wrap
| adapter, then install a protective cover at each end of the complete
| wrap cable and adapter assembly.
| 2. Place the wrap cable and adapter assembly into its plastic bag, and return
| it to the place where it is normally kept.
| 3. Exchange the Fibre-Optic Extender for a new one.
| 4. Observing the identifications of the fiber optic cables, connect the cables to
| the new Fibre-Optic Extender.
| 5. Go to “MAP 2410: 7133 – Repair Verification” on page 2-2410-1 to verify
| the repair.
Chapter 2. Problem Determination Procedures
2-2330-11