7.2
PCB Information
M2000-00
31/11/96 Copyright TEL
PCB Identification
All PCBs are identified by a unique 10 digit ‘internal part number’ (IPN), e.g.
220-01330-02, which is screen printed onto the PCB (usually the top side).
The last 2 digits of this number define the issue status, which starts at 00 and increments
through 01, 02, 03, etc. as the PCB is updated. Some issue PCBs never reach full produc-
tion status, and are therefore not included in this manual. A letter following the 10 digit
IPN has no relevance in identifying the PCB for service purposes.
In the following diagram of the T2000-66 UART PCB, the IPN is 220-01348-03, (i.e. issue
03 of the PCB).
It is important that you identify which issue PCB you are working on so that you can
refer to the appropriate PCB information.
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