Parts List - Orban 8100A/XT2 Operating Manual

6-12
Technical Information
3. PARTS LIST
Parts are listed by ASSEMBLY, then by TYPE, then by
reference
DESIGNATOR. See drawings
in Section 6.4 for location of components. Widely used common parts are not listed; such
parts are described generally below (examine the part to determine exact value).
SIGNAL DIODES, if not listed by reference designator in the following parts list, are:
Orban part number 22101-000, Fairchild (FSC) part number 1N4148, also available from many
other vendors. This is a silicon, small-signal diode with ultra-fast recovery and high conductance.
It may be replaced with 1N914 (BAY-61 in Europe).
(BV: 75V min. @ I r = 5V I r : 25nA max. @ V r = 20V Vf 1.0V max. @ If = 100mA
tjj: 4ns max.)
See Miscellaneous list for ZENER DIODES (reference designator VRxx).
RESISTORS should only be replaced with the same style and with the exact value marked on the
resistor body. If the value marking is not legible, consult the schematic or the factory. Performance
and stability will be compromised if you do not use exact replacements. Unless listed by reference
designator in the following parts list, resistors are:
Metal film resistors have conformally-coated bodies, and are identified by five color bands or
a printed value. They are rated at 1/8 watt @ 70°C, ±1%, with a temperature coefficient of 100
PPM/°C. Orban part numbers 20038-xxx through 20045-xxx, USA Military Specification MIL-R-
10509 Style RN55D. Manufactured by R-Ohm (CRB-1/4FX), TRW/IRC, Beyschlag, Dale, Coming,
Matsushita.
Carbon film resistors have conformally-coated bodies, and are identified by four color bands.
They are rated at 1/4 watt @ 70°C, ±5%. Orban part numbers 20001-xxx, Manufactured by R-Ohm
(R-25), Piher, Beyschlag, Dale, Phillips, Spectrol, Matsushita.
Carbon composition resistors have molded phenolic bodies, and are identified by four color
bands. The 0.090 " x 0.250 " (2.3mm x 6.4mm) size is rated at 1/4 watt, and the 0.140 " x 0.375 "
(3.6mm x 9.5mm) size is rated at 1/2 watt, both ±5% @ 70° C. Orban part numbers 2001x-xxx,
USA Military Specification MIL-R-11 Style RC-07 (1/4 watt) orRC-20 (1/2 watt). Manufactured
by Allen-Bradley, TRW/IRC, Matsushita.
Cermet trimmer resistors have 3/8 " (9mm) square bodies, and are identified by printing on their
sides. They are rated at 1/2 watt @ 70°C, ±10%, with a temperature coefficient of 100 PPM/°C.
Orban part numbers 20510-xxx and 20511-xxx. Manufactured by Beckman (72P, 68W- series),
Spectrol, Matsushita.
btaining spare parts:
Special or subtle characteristics of certain components are exploited to produce an elegant de ­
sign at a reasonable cost. It is therefore unwise to make substitutions for listed parts. Consult
the factory if the listing of a part includes the note " selected " or " realignment required " .
Orban normally maintains an inventory of tested, exact replacement parts that can be supplied quickly
at nominal cost. Standardized spare parts kits are also available. When ordering parts from the factory,
please have available the following information about the parts you want:
Orban part number
Reference designator (e.g., C3, R78, IC14)
Brief description of part
Model, serial, and " M " (if any) number of unit (see rear-panel label)
To facilitate future maintenance, parts for this unit have been chosen from the catalogs of well-known
manufacturers whenever possible. Most of these manufacturers have extensive worldwide distribution
and may be contacted through their local offices. The USA headquarters addresses are given at the
end of this parts list