Model 3300A Section V
Table 5-4. Troubleshooting Aid (Cont'd)
SYMPTOM POSSIBLE CAUSE
Half of sine wave clipped on both channels. Check A14Q5 and A14Q7.
The synthesizer waveform is symmetrical about 10 volts at the base of
A14Q5 and at the corresponding junctions along the voltage divider
R10 to R15 and R25 to R20.
Loss of square wave symmetry at lowest
range.
Inoperative oven, open thermal fuse.
No oscillation on X.1 and X.01 RANGE; dial
at 1.
Check A11Q8.
+20 volts ok when oven cold, high when
oven hot.
Check A11Q1, A11Q2.
Slow symmetry drift. Check A14CR21, A14CR20, A11Q6, A11Q7.
Figure 5-8. Troubleshooting Tree
5-9
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