IBM 7133 Series Service Manual

| YES| 1. Exchange the Fibre-Optic Extender for a new one.| 2. Go to “MAP 2410: 7133 – Repair Verification” on page 2-2410-1 to verify| the repair.| 3. If the problem remains, continue with this step.| If the new Fibre-Optic Extender that you have just installed is plugged| into a 7133, exchange, in the sequence shown, the following FRUs for| new FRUs. Ensure that for each FRU exchange, you go to “MAP| 2410: 7133 – Repair Verification” on page 2-2410-1 to verify the| repair.| a. The first disk drive module in the string whose connector you have| just checked (see “Disk Drive Modules” on page 3-17).| For information about disk drive module strings, see “Internal| Connections (Models 010 and 020)” on page 1-17 or “Internal| Connections (Models 500 and 600)” on page 1-20.| b. If present, the dummy disk drive modules that are between the| connector and the first disk drive module of the string (see “Dummy| Disk Drive Modules” on page 3-28).| c. The card into which the new Fibre-Optic Extender is plugged (see| “Signal Cards and Bypass Cards” on page 3-43).| If the new Fibre-Optic Extender that you have just installed is plugged| into an SSA adapter, exchange that adapter for a new one (see the| Installation and Service Guide for the using system).| If the new Fibre-Optic Extender that you have just installed is plugged| into some other device, exchange, for new FRUs, the appropriate| FRUs of the device (see the service information for the device).2-2330-6 7133 Service Guide