HP 212A - Page 31

Replace V105. Check maximum pulse delay,
position of '0' delay on PULSE POSITION
control and micsophenics.
22. INSUFFICIENT PULSE
DELAY
V105
23. LNSUFFLCIENT PULSE
AMPLITUDE
24. HUMP ON BASELINE
FOLLOWING AND AT-
TACHED TO OUTPUT
PULSE
E
25. HUMP ON BASELINE
FOLLOWING AND DE-
TACHED FROM OUTPUT
PULSE
s
R 3 5
With AMPLITUDE control set to maximum,
adjust R35 ta give 60 volt output pulse.
26, INACCURATE RATE R125 Tolerances of high resistance potentiometers
CALIBRATION are wide. The potentiometer selected will
determine calibration accuracy.
27. RINGING ON BASELINE,
FOLLOWING REPLACE-
MENT OF TRANSFORMER
T103
V11
Replace VlT.
T 103
Install 220 ohm, 1/2 watt resister in series
with grid of V 16.
I
I
V6 I
Replace Vb.
Check leading edge of output
pulse and PULSE LENGTH calibration.