Troubleshooting Tables - HP 3300A Technical Manual

Model 3300A
Figure 5-9. Normal Oscillator Wave Forms
FUNCTION
Dial Accuracy
Distortion
Output
Square Wave
Sync Output
Remote Freq control
Channel B-A Check
Power Supplies
Table 5-5. Maintenance Correlation Table
PERFORMANCE CHECK
Paragraph 5-5
Paragraph 5-7
Paragraph 5-10thru 5-15
Paragraph 5-16 and 5-17
Paragraph 5-18
Paragraph 5-19
Paragraph 5-20
None
limit of the negative slope out of the integrator circuit.
The condition of the other major circuits in the basic
oscillating loop, the Voltage Comparator Bi-stable
Multivibrator and current source, can, in most instances,
be used to isolate the malfunction to a given circuit as
outlined in Figure 5-8. The term normal, as applied to
the results obtained at the different points tested, refers
to the output at that point which would reverse the slope
at the output of the triangle integrator and sustain
oscillation. Abnormal refers to that output which would
produce the same slope and prevent oscillation.
5-61. Figure 5-9 contains the normal voltages and
waveforms which should be present at the points
indicated. Voltage levels are approximate and may vary
from instrument to instrument due to differences in
transistors.
5-62.

TROUBLESHOOTING TABLES.

5-63. Table 5-4 gives additional information to assist
in the isolation of a malfunction.
possible causes are listed.
Correlation Table, lists various 3300A functions and
gives the corresponding performance checks and
adjustments.
ADJUSTMENT AND
CALIBRATION
Paragraph 5-34 thru 5-37
Paragraphs 5-38, 5-30 and
5-31
Paragraphs 5-39 thru 5-42
Paragraph 5-41 and 5-42
None
None
None
Table 5-2
Figure 5-4
5-10
Section V
Symptoms and
Table 5-5, Maintenance
TROUBLESHOOTING
Para. 5-23, All assy
Oven, All assembly
A15 or A16 assembly
Q5 thru Q8
Isolate trouble to
specific board or
chassis by interchang-
ing A15 and A16 boards.
A14C7, A14R46 and
A14R48
J6 or plug-in pins 32, 7
Continuity A15 pin 11
to S5AF pin 5, 11, to 16R5
Remove PC boards; see
para. 5-55;Check
components
A12