For displaying 7 curves, it is necessary to add a
third diode. Any general purpose germanium device
is acceptable.
TROUBLESHOOTING
The schematic diagram possesses all the informa
tion necessary to expedite repair of the instrument in
case of failure Waveform diagrams have been in
cluded and all major test points are clearly labeled
with reference to the PC board. It is most important
to follow the explicit control setting and set-up pro
cedure as given in the "notes" column in order to
obtain the illustrated waveforms. Point-by-point sig
nal tracing with a triggered-sweep oscilloscope is
recommended because it provides the best indication
of dynamic conditions in a stage, which will reduce
time in locating defective components. If the reason
for malfunction cannot be determined, refer to the
Warranty Service Instructions on the last page of
this manual.
Figure 39. Curve Display Modification Diode Location
31
