M800-00
T807/808 PCB Information
B8.1.3
Copyright TEL
31/08/96
8.1
Introduction
PCB Identification
All PCBs are identified by a unique 10 digit number, the last 2 digits of which define the issue status.
The issue status starts at 00 and increments through 01, 02, 03, etc. as the PCB is updated. Some
issue PCBs never reach full production status and are therefore not included in this manual. A let-
ter following the 10 digit IPN has no relevance in identifying the PCB for service purposes.
Parts Lists
The 10 digit numbers (000-00000-00) in this Parts List are “internal part numbers” (IPNs). Your
spare parts orders can be handled more efficiently if you quote the IPN and provide a brief descrip-
tion of the part.
The components listed in this parts list are divided into two main types: those with a circuit refer-
ence (e.g. C2, D1, R121, etc.) and those without (miscellaneous and mechanical).
Those with a circuit reference are grouped in alphabetical order and then in numerical order within
each group. Each component entry comprises three or four columns, as shown below:
The miscellaneous and mechanical section lists the variant and common parts in IPN order.
circuit reference -
lists components
in numerical order
variant column -
indicates that
this component
is fitted only to
this variant
Internal Part Number -
order the component
by this number
description -
gives a brief description
of the component
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