Cleaning And Lubricating Rotary Switches; Factory Selected Components - HP 3580A Operating And Service Manual

Model 3580A
and removing the four screws holding the pack
to the side of the instrument chassis. The
individual battery sticks may short out against
the sides of the instrument if the entire battery
pack is not first removed.
7-32. To determine which battery stick is faulty, place the
3580A on CHARGE for 14 hours and then run the 3580A
on battery power until the undervoltage relays shut the
battery power off. (Good batteries will run for 5 hours
without a recharge). Measure the voltage across each
battery stick. The nominal voltage should be approximately
5 volts per stick. Test for the stick which is lower in voltage
than the other battery sticks. A bad stick will differ from
the other battery sticks by .5 or more volts.
7-33. The normal warranty period on batteries is 90 days.
Proper operation implys that the battery, operated under
normal temperatures and load, will charge from a state of
complete discharge in 14 hours, and will then power the
instrument for 5 hours of continuous and normal use.
7-34. Cleaning and Lubricating Rotary Switches.
7-35. Faulty switches can cause intermittent performance,
spurious responses, noise, and many other annoying prob-
lems. Tests have shown that the typical operating life of a
switch is 25,000 operations or more. With proper cleaning
and lubrication, this life may be extended to as much as
100,000 or more operations. Freon TF cleaner (-hp- Part
No. 8500-0232) is available for cleaning switches. Electro-
tube 2G (-hp- Part No. 5060-6086) is available for lubricat-
ing high impedance switches. Electrotube 2A (-hp- Part No.
6040-0300) is available for lubricating low impedance
switches. Follow the instructions given with these cleaners,
-hp- Service Note M45B (available from your local -hp-
Sales and Service Office) also gives detailed information on
how to use these cleaners.
7-36. Repairing Handles. (For S/N 1415A00975 and
below) Anytime a loose or broken handle is repaired the
new type screw should be used. The illustration indicates
the assembly order. The screw which attaches the L shaped
plastic piece remains the same.
In order to repair both handles on one instrument the
following new parts are needed.
4 ea screw P/N 03580-26001
4 ea washer P/N 3050-0456
1·31. FACTORY SELECTED COMPONENTS.
7-38. Certain components within the 3580A are individu-
ally selected at the factory to compensate for slightly
varying circuit parameters. These components are identified
by an_ asterisk (*) in the parts list and schematic diagrams.
Section VII
Table 7-3. Factory Selected Components.
Component
Function Value Range
A3R88* Controls Sweep Time/ 11.8k.!1±1%1/8W
Div. Increasing A3R88*
13.7k.!1±1%1/8W
increases sweep time
15.4k.!1±1%1/8W
Decreasing A3R88:
17.4 k.!1±1% 1/8
w
decreases sweep time
19.6 k.!1±1% 1/8
w
21.5 k.!1±1%1/8 W nominal
23.7 k.!1 ± 1%1 /8
w
26.1 k.!1±1%1/8W
28.0 k.!1 ± 1 % 1 /8
w
30.9 k.!1±1% 1/8
w
33.2 k.!1 ± 1 % 1 /8
w
A6R41* Adjusts
+
10 V power sup-
243 n to 1 .96 kn 1 /8 W
ply to 10 V ± .050 V. In-
typical: 1 .05 k.!1
creasing A6R41 * increases
the voltage. Decreasing
A6R41 *decreases the volt-
age.
A7R109* Adjusts positive pulse 18·.2 kn to 63.4 kn 1 /8
w
width at A 7TP5 to 1 .0 typical: 24.3 k.!1
to 1.4 µsec (Rev. Al
or 2.0 to 2.4 µsec (Rev.
BJ. Increasing A7R109*
increases pulse width.
Decreasing A7R109*
decreases pulse width.
R7R111* Adjusts positive pulse at
24.9 k.!1 to 41.2 k.!11/8 W
A7TP4 to 3.5 to 3.9 µsec. typical: 32.4 k.!1
Increasing A7R111 *
increases the pulse width.
Decreasing A7R111 *de-
creases the pulse width.
A11A1R2* Gives proper intensity 100k.!1or1 Mn
limit adjustment. typical: 100 k.!1
A18R3* Matches alphabetic code
A
o·n
printed on transformer. B 51.1.!1±1%1/BW
c
100 n ± 1% 1/8
w
D
1500 ±1%1/8W
E 182fl±1%1/8W
F 221n±1%1/8W
G 267 n ± 1% 1/8
w
H 332S'l±1%1/8W
I 392 n ± 1% 1/8
w
J 4750±1%1/8W
K 562 n ± 1% 1/8
w
A14R46 Adjusts range of 11 k!l±1%1/8W
"DIAL HI END SET" 12.1k.!1±1% 1/8
w
control.
13.3 kn ± 1 % 1 /8
w
14.7 k.!1±1% 1/8
w
15.4 k.!1±1% 1/8
w
A typical value is given for each. Table 7-3 is a list of the
factory selected components, functions, and value ranges. A
detailed description of selecting A3R88* is given in Para-
graph 7-39. The other components will usually not require
reselection. (The crystal padding resistors are factory
selected and cannot be selected in the field. See Crystal
Replacement, Paragraph 7-19).
7-39. A3R88* should be reselected if the frequency ramp
integrating capacitor (Cl) is changed (See Schematic 4). To
select A3R88*, select the following front panel control
settings:
ADAPTIVE SWEEP ................. OFF
SWEEP TIME/DIV . . . . . . . . . . . . . . . 1 SEC
SWEEP MODE ............. , ....... REP
Measure the time interval between the negative and positive
voltage transition at A3TP5 with an electronic counter. For
the -hp- 5326A Counter, the controls should be:
7-6(a)