Marconi Instruments TF 2502 - Chapter 6 REPLACEABLE PARTS

Replaceable parts
Introduction
This chapter lists replacement parts in alphabetical order of their circuit
references, with miscellaneous parts at the end of the list. The following abbreviations
are used:
c
capacitor RV
variable resistor
Carb
carbon s
switch
Cer
ceramic
SKT socket
CRT
cathode ray tube T
transformer
Elec electrolytic
TE total excursion
FS
fuse TH
thermistor
ILP
illuminating lamp
TP terminal
JK
jack
v
valve
Log
logarithmic law Var
variable or preset
M
meter VT
transistor
Met metal ww
wire wound
Min
minimum value
X ferrite bead
MR
semiconductor diode
t
value selected during test
Ox
oxide
¢
feed-through component
PL
plug W*
watts at 70 °C
Plas
plastic W**
watts at 55 °C
PLP
pilot lamp
W***; watts at·40 °C
R
resistor
wo
watts at unspecified temperature
Ordering
Send your order for replacement parts to our Service Division at the address
given on the back cover. Specify the following information for each part required:
1) Type and serial number of instrument
2) Circuit reference
3) Description
4) M. I. code number
If a part is not listed, state its function, location and description when ordering.
2502 (1)
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