Model 3300A
Section V
Figure 5-9. Normal Oscillator Wave Forms
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. Symptoms and
possible causes are listed. Table 5-5, Maintenance
Correlation Table, lists various 3300A functions and
gives the corresponding performance checks and
adjustments.
Table 5-5. Maintenance Correlation Table
ADJUSTMENT AND
FUNCTION
PERFORMANCE CHECK
CALIBRATION
TROUBLESHOOTING
Dial Accuracy
Paragraph 5-5
Paragraph 5-34 thru 5-37
Para. 5-23, All assy
Distortion
Paragraph 5-7
Paragraphs 5-38, 5-30 and
Oven, All assembly
5-31
Output
Paragraph 5-10thru 5-15
Paragraphs 5-39 thru 5-42
A15 or A16 assembly
Q5 thru Q8
Square Wave
Paragraph 5-16 and 5-17
Paragraph 5-41 and 5-42
Isolate trouble to
specific board or
chassis by interchang-
ing A15 and A16 boards.
Sync Output
Paragraph 5-18
None
A14C7, A14R46 and
A14R48
Remote Freq control
Paragraph 5-19
None
J6 or plug-in pins 32, 7
Channel B-A Check
Paragraph 5-20
None
Continuity A15 pin 11
to S5AF pin 5, 11, to 16R5
Power Supplies
None
Table 5-2
Remove PC boards; see
Figure 5-4
para. 5-55;Check A12
components
5-10
Summary of Contents for 3300A
Page 31: ...Model 3300A Section VI Figure 6 1 3300A Top and Bottom Views 6 2 ...
Page 32: ...Model 3300A Section VI Figure 6 2 Oscillator Circuit Schematic A11 A13 and A14 6 3 ...
Page 33: ...Model 3300A Section VI Figure 6 4 Output Amplifiers Schematic A15 and A16 6 5 6 6 ...
Page 34: ...TM 11 6625 2495 14 P THIS PAGE CURRENTLY NOT AVAILABLE FOR DIGITIZATION PAGE Figure 6 3 6 4 ...
Page 35: ...Model 3300A Section VI Figure 6 5 Power Supply Schematic A12 and A11 6 7 6 8 ...
Page 36: ...Model 3300A Section VI Figure 6 6 J6 Plug In Receptacle 6 9 ...
Page 58: ...SECTION IV REMARKS REFERENCE REMARKS CODE A Visuals B Performance checks D 5 ...
Page 60: ......
Page 61: ...PIN 046175 000 ...
