IBM 7133 Series Service Manual

| Step 15| (from step 12 on page 2-2330-14)| The disk drive module is receiving SSA signals correctly.| Have you checked both ends of the optical link?| NO| 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. Observing the identifications of the fiber optic cables, reconnect the cables| to the Fibre-Optic Extender.| 4. Find the Fibre-Optic Extender that is at the other end of the link.| 5. Go to step 2 on page 2-2330-3.| YES| 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, reconnect the cables| to the 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 2-2330-17