IPN 220-01397-01
M850-00
T856 PCB Information
C6.2.3
Copyright TEL 31/09/98
T856 Parts List (IPN 220-01397-01)
How To Use This Parts List
The components listed in this parts list are divided into two main types: those with a circuit reference (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: the circuit reference, variant (if applicable), IPN and description. A number in the variant col-
umn indicates that this is a variant component which is fitted only to the product type listed. Static sensitive devices are indicated by
an (S) at the start of the description column.
The miscellaneous and mechanical section lists the variant and common parts in IPN order. Where possible, a number in the legend
column indicates their position in the mechanical assembly drawing.
The Parts List Amendments box below lists component changes that took place after the parts list and diagrams in this section were
compiled. These changes (e.g. value changes, added/deleted components, etc.) are listed by circuit reference in alphanumeric order
and supersede the information given in the parts list or diagrams. Components without circuit references are listed in IPN order.
Parts List Amendments
#C930, #C960 400-440MHz (-10, -13 & -15): deleted to improve output power (710296 and 710359).
IC710 Changed from 74HCV04 (IPN 002-74910-04) to 74HC04 (IPN 002-74900-04) to increase the gain of the TCXO
buffer (710312).
L345 -10 type only: rewired and placed on its side to improve output power (710296).
L355 400-440MHz (-10, -13 & -15): changed from 1.5T/2.5mm coil (052-08125-15) to 1.5T/3.5mm coil (052-08135-15)
to regulate output power; circuit reference also changed to #L355 (710284).
New Product
Types
The following component changes apply to the T856-16-0000/26-0000/36-0000 Product Types:
&C269 changed to 4p7 (IPN 015-21470-01)
C271 changed to 56p (IPN 015-22560-01) - circuit reference changed to &C271
C289 changed to 68n (IPN 015-25680-08) - circuit reference changed to &C289
R290 changed to 680Ω (IPN 036-13680-00) - circuit reference changed to &R290.
303-11169-03 T800 chassis: replaced by 303-11169-04
312-01052-01 T800 top lid: replaced by 312-01052-02
312-01053-01 T800 bottom lid: replaced by 312-01053-02
319-01173-00 D-range shield: deleted
319-01174-00 N-type connector shield: deleted
Chassis Screws The Pozidriv screws securing the rear panel connectors and cover plate were replaced by Torx head screws when
the shields were deleted.
New chassis and lid tooling introduced, incorporating
mechanical improvements and better RF shielding
(750027, 750028 & 750029). Note that the new lids
should be used only with the new chassis.
no longer required with new chassis and lids (710427).
To Next Page
Loading...
Need help?
General
