the transistor is leaking current through its junctions. When making these measurements,
avoid using the R x 1 scale on the meter or a meter with a high internal battery voltage.
Either of these conditions can damage a low-power transistor. Now consider the possible
transistor problems (see Table 2-2) that could exist if the indicated readings in Figure 2-22
are not obtained. Figure 2-22 shows a PNP transistor. If you need to test an NPN transistor
for leakage, the procedure is identical to that used for testing the PNP except the readings
obtained are reversed.
Figure 2-22. Testing a Transistor's Leakage with an Ohmmeter
23 June 2005