HP 5245L - SECTION VI ADJUSTMENT AND TROUBLESHOOTING; INTRODUCTION; MAINTENANCE; Fuse Replacement

Model 5245L
6-t.
tNTRODUCTtON.
6
-2.
This sectionprovides
maintenance,
adjustments,
and
troubleshooting
information
for the
Model
5245L
Electronic Counter.
6.3.
MAINTENANCE.
6-4. AIR FILTER.
Inspect the
air
filter
(center
of
rear
panel)
regularly
and
clean
it
before
it
becomes
dirty
enough
to restrict
air
flow. Proceed as
follows:
a.
Remove
top
cover
(unlock
the
two
quarter
turn
fasteners and
slide cover to the rear).
b.
Remove four
screws
holding filter in
place.
c. Wash filter
in warm water and detergent.
d.
Allow
filter
to
dry completely.
e.
DO
NOTAPPLY ANYCOATING
COMPOUND
TO
NON-METAL
FILTERS.
Coat metal
filters with
light
film of
filter
oil. We recommend No.
3
Filter
Coat
from Research Products Company. This
adhesive
is
available
in"Handi-Koter"
sprayer cans
at inost
heat-
ing
supply stores or
from
your
Hewlett-Packard
field
office.
6-5.
FUSE
REPLACEMENT. Table
6-1
lists fuse
rating and HP Part No.
for
proper
operation
with
either
115V
or
230Vac.
Section
VI
Paragraphs
6-1
to
6-10
6-6.
FAN MOTOR.
TVo
drops of
light machine
oil
should be applied
to the
fan motor
shaJt once
a
year.
6.7. TEST
EQUIPNIENT.
6-8.
Recommended
test equipment
for
adjustments
and
troubleshooting is
listed in
Table
6-2. Test in-
struments
other thanthose listed maybe
used
if their
specifications are
equal
to
or exceed the required
characteristics.
6-9.
ASSEiIBIY
CONNECTTON
I D ENTI
FICATIO N.
6-10. Throughout
the
manual, connections
to
printed
circuit
assemblies
are referred to in abbreivatedform.
For
example, the connection to
pin
15 of
assembly A6
is
.a.6(15).
SECTION
YI
ADJUSTffTENT
AND
TROUBTESHOOTING
Table 6-1.
Fuse
Replacement
Conversion 115
Volt
230 Volt
Slide
switch
Left
("
115")
Right
("230")
AC LINE FUSE
2 ampere
slow-blow
(HP
2110-0006)
1
ampere
slow-blow
(HP
2110-oo0?)
Table 6-2.
Recommended
Test Equipment
Instrument Type
Required
Characteristics
Use
Instrument
Recom..
Oscilloscope 50
MHz
bandwidth,
dual trace
plug-
in, ext sync capability
Observe waveforms
HP
Model
175.4'
duringtroubleshoot-
Oscilloscope
ing
and adjustment.
HP
Model
1?50A
DuaI
Performance Check.
Trace Vertical
Ampl
HP AC-21C Voltage
Divider
Probe
(twa)
HP
10003A 10:1
Probe
Test
Oscillator Continuously
variable
from
l0
Hz
to 50
MHz,
100
mV output
Performance Check
HP Model
2048
Adjustments
Oscillator
Troubleshooting
HP
Model 606A Test
Oscillator
Low
Frequency
Generator
Continuously variable
from 2 Hz
to
10
Hz,
100
mV output
Performance
Check HP
Model 2024' Low
Troubleshooting
Frequency Function
Generator
Pulsb
Generator
1
psec
wide,
1V
negative,
l
kHz
repetition rate
Performance
Check HP
Model
?LZA
Pulse
Troubleshooting
Generator
DC Voltmeter 0V
to
*
1?0V, 10
megohm
input
impedance,
l%o
accutacY
Troubleshooting
HP
Model
4t2A
Adjustments
Digital to Analog
Converter
L-2-2-4
BCD code
Performance Check
HP
Modet
581A
Troubleshooting
Strip-Chart
Recorder
Performance Check
Moseley 680A'
Troubleshooting
02349-1
6-1