Roberts ecologic 2 - Page 14

Measure whether the
speaker terminal has
sound wave.
Check whether the Pin6
of IC4 is 5V.
Check IC4 and B1.
Check Speaker.
Check whether the Pin1
of IC4 is High Level.
Check Q17, JK301, R135,
W1 and CON300.
Check IC4, L10 and L11.
No
B
Y
es
Y
es
Y
es
No
No
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