HP 5315 A - Service Aids; Pozidriv Screwdrivers; Assembly Identification; Theory of Operatio

Model 5315A /8
Service
6-4
8-21. SERVICE AIDS
8-22. Pozidriv Screwd riv ers
8-23. Many screws in the 531S A/B appear to be Phillips, but are not. To avoid damage to the
screw slot
s, Pozidrive screwdrivers should be used.
8-24. Service Aids
on Printed Circuit Boards
8-25. The servicing aids include test points, transistor and integrated circuit designations,
adjustment callouts, and assembly stock numbers.
8-26.
Assembly Identification
8-27. The assembly number, name, and Hewlett-Packard part
number of 5315A/B assemblies
are listed in Table 8-1 and located on Figures 8-5 and 8-6.
Table 8 1 Assembly Identification
-
Refer ence Designation Description HP Part Number
Al
Motherboard/Power Supply Assembly
OS315-60001{A )
OS315 - 60008{B )
A2
Display Assembly
05315-60002
A3
I nput Assembly
05315-60003
A4
Input Amplifier Assemb ly
05315-60004
AS
Support Board Assembly
05315-60005
A6
Battery Charger Assembly
05315-60006
A7
TCXO Assembly
05315-60007
A6
Power Module (53158)
0960-0443
8-28. THEORY OF OPERATION
8-29. Introduction
8-30.
The 5315A / B is a Un iversal Counter with frequency, period, time in ter va l, time interval
average, ratio, and totalizing capabilities. The basic functional operation centers
on the Mirco-
computer (1lC) as the main controller. Two additional lSI circuits. a Multiple-Register-Counter
(MRC) and a Display Decoder/ Driver are peripherals to
the controller, and perform the data
collection and display functions. The folloWing paragraphs describe the
overall functional
operation and reference
Figure 8-2, Overa ll Block Dia gra m.