HP 437B Service Manual

HP 437B
Make adjustments only in the order specified.
Note 4%
5-5.
Post-Repair
Table
5-2
lists
the
adjustments
related
to
repairs
or
replacement
of
any
of
the
Adjustments
assemblies.
Table 5-1. Factory Selected Components
Reference
Service
Range
of
Basis
of
Selection
Designator
Sheet
Values
A4R73
A4C
8252
1.
If
the
reference
power
is
outside
the
A4VR3
with
5.11V
range
of
1.000
+/-
0.007
mW
between
OC and 5SC, and if the A4R73,
A4VR3 combination is 825 Q
& 5.11V then change the A4R73,
A4VR3 combination to
1470 2 & 8.25V. However, if the
' A4R73, A41VR3 combination is
already 1470 2 & 8.25V, then a
problem exists elsewhere.
Zener or
1470 Q with
8.25V Zener
combination
Table 5-2. Post-Repair Adjustments, Tests, and Checks
Assembly Related Adjustments or Reference
Repaired Performance Test Service
Sheet
Al Display None A3B
A2 Keyboard None A3B
A3 Central Processing Unit 4-7, 4-8 A3A-A3C
A4 Analog Assembly 4-8, 4-9, 5-6, 5-7, 5-8, 5-9 A4A-A4C
(Includes Ref Oscillator)
50 MHz Reference Oscillator 4-10, 5-8, 5-9 A4C
(Part of Analog Assembly)
5-2 ADJUSTMENTS

HP 437B Specifications

General

Brand	HP
Model	437B
Category	Measuring Instruments
Language	English