HP 212A - Page 28

SUGGESTIONS - CAUTIONS - CHECKS - ETC.
Replace V16,
Check leading edge of output
pulse and PULSE LENGTH calibration.
Replace V 108. Check PULSE LENGTH
calibration.
Replace V8, check trailing edge of output
pulse.
Replace CR105,
Only as last resort change this crystal as it
may require calibration of another PULSE
LENGTH dial.
SYMPTOM
13, JITTER ON TRALLING
EDGEONLYOUTPUT
PULSES
DEFECTIVE
COMPONENT
Vlb
V 108
V8
CR105
CR106
Replace Vlb and check trailing ledge of output
pulse and PULSE LENGTH calibration.
14. SLOW DECAY TIME I V16
A-1
-
-------
15. JITTER ON BOTH
EDGES OF OUTPUT
PULSE
-
V8
Replace V8 and check trailing edge of output
pulse
and PULSE LENGTH calibration.
V 101
..I
Replace V10 1. Check zero and maximum
pulse advance and micr ophonic s .
V105
.Io4
V 106
C 103
Replace- V105. Check zero and maximum
pulse delay and microphonics.
Replace calibration. V 104. Check PULSE RATE
Replace V106.
Coupling capacitor C I39 (C 103) may be con-
nected in two different positions. Either
position may be used.
(See schematic diagramsl