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4. Trouble shooting.
Checking address COF input of resistor and IC
IC input checking
Inside of IC , there is 4 ea diodes which separated in 2 series .
(input 2, output 2)
*how to check
1.contact DMM - terminal to a right terminal of condenser(GND)
and DMM + terminal to a right terminal of IC, normal value 0.66 (fig.1)
2.contact DMM - terminal to Output terminal of resistor, and
DMM + terminal to a right terminal of IC , normal value 0.73 (fig.2)
Fig. 2
Fig. 1
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