4-38. RECTIFIER (CR1) AND CAPACITORS (C1 AND C2). - continued
(4) Rectifier (CR1).
(a) Using a multimeter on high ohms setting connect negative (-) lead to terminal 2 and positive (+) lead
to terminal 1 or 3. A low~resistance reading should be obtained.
(b) Connect positive lead to terminal 2 and negative lead to terminal 1 or 3. An open circuit should be
(c) Connect positive lead to terminal 4 and negative lead to terminal 1 or 3. A short circuit should be
(d) Connect negative lead to terminal 4 and positive lead to terminal 1 or 3. An open circuit should be
The ohmmeter test does not show the behavior of a capacitor under load. Such
testing requires special equipment which is not economically practical for testing
small capacitors. If breakdown under load is suspected, replace the capacitor.
(5) Capacitors (C1) and (C2).
Using a multimeter set to read high resistance, place positive lead to positive terminal and negative
lead to negative terminal of capacitor.
(b) If capacitor is good, multimeter needle should move rapidly to top of scale then slowly return to zero.
The capacitor is internally short circuited if needle moves to top of scale and stays there. The
capacitor has an open circuit if the needle does not move.