TM8100/TM8200 Service Manual General Information 117© Tait Electronics Limited November 20074.5 Replacing Board ComponentsTo obtain a replacement board component, complete the following steps inthe order shown:1. Check the issue number.2. Identify the damaged component.3. Consult the technical notes.4. Verify the specifications.5. Order the replacement component.Check the IssueNumber1. Locate the unique 10-digit Internal Part Number (IPN) that isprinted on the PCB. For example, .2. Make sure that the IPN on the board is identical to the IPN on thePCB Information document that was supplied with the servicedocumentation.The last two digits of each Internal Part Number (IPN) are the issuenumber of the board. Starting at 01, the issue number increments byone (02, 03, and so on) each time the PCB is re-issued. See also“Consult the Technical Notes”, below.3. If the IPNs do not match, download the correct version of the PCBInformation from the Technical Support website.Note To replace a printed board assembly, such as a control board, quotethe relevant product code: see “Product Codes” on page 17.To replace a component on a PCB, however, use the IPN on thePCB to locate the correct PCB Information document: see “PCBInformation” on page 109.Identify theDamagedComponent1. Consult the BOM for the board under repair.2. Use the BOM to identify the damaged component.Consult theTechnical Notes Consult all technical notes that apply to the board before ordering thereplacement component. Technical notes are published on the TechnicalSupport website.When there is a major change in the design of a board, such as a change inlayout, the issue number of the board increments. When this happens, theIPN changes, new PCB Information is published, and a technical note iscreated. In between major changes, minor changes may be made to a board.For example, one component may be changed. There is no change to theissue number of the board, but if the minor change is important, a technicalnote is created. IPN and PCB Information will not alert you to a minorchange: only the technical notes will. It is good practice to print and store acopy of every technical note.220-01761-09
