Barclays Branch Controller

This maintenance guide outlines the procedures for troubleshooting and maintaining the Barclays Branch Controller, specifically the MK II model. It includes information on:

• System Diagnostics: Instructions on running internal diagnostics, interpreting LED display codes, and using the keyboard switch to control the boot sequence.
• Hardware Maintenance: Step-by-step procedures for accessing field-replaceable units (FRUs), including printed circuit boards (PCBs), power supply units (PSUs), and disk drives (RD51 and RX50).
• Power Checks: A flowchart for diagnosing power-related issues.
• Configuration: Detailed figures showing jumper, switch, and cable configurations for various modules like KDF11-BA, MSV11-PL, KMV11-B, DLV11-J, and DRV11.
• Appendices: Includes information on cable routing, firmware revision codes, software loading procedures, and a comprehensive list of field-replaceable units.