HP Q METER 4342A - Page 81

Section V
Figure 5-13
YES
Set oscillator frequency to
Check; A5 Detector
YES
1OOkHz and observe wave-
r
form at A5Q9 emitter with
oscilloscope. Is display a
5.7Vp-p *100/o sinewave?
--I
NO
Check; A5 (RF Amp. Q7, 8, 9)
Set oscillator frequency to
1OOkHz and observe wave-
YES
NO
Check; A5 (RF Amp. Q5, 6)
form at A5Q4 emitter with
oscilloscope. Is display
s
a O. OSVp-p *lo% sinewave?
NO
Check; A5 (Impedance Converter Ql thru Q4)
YES
c
Check: A5 Detector
Check*
NO h
A5, RF Amplifier
Figure 5-13. Troubleshooting, Voltmeter Section
5-23