IPN 220-01396-02
M850-00
T855 PCB Information
B6.3.3
Copyright TEL 31/09/98
T855 Parts List (IPN 220-01396-02)
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
C302 Changed from 120pF (IPN 015-23120-01) to 100pF (IPN 015-23100-01)
C304 Deleted
Additional
Capacitor
4p7 chip capacitor (IPN 015-21470-01 - no circuit reference) added in
parallel with L380 (on top of R328)
L380 Changed from Tait coil #621 (IPN 050-00016-21) to #622 (IPN 050-00016-22)
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
to improve the input match to
the post-mixer buffer (Q310)
(710264).
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.
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