Hi Team
My customer is using CD4060B for 3min counting, as below schematic, when XTGZ110V (110VDC) startup, the device start to counting, after 3min, Q14 ouput 12V to open the MOSFET, then relay works.
This circuit has been using for at least 5 years with no problem, but lately we have several counting issue, sometimes after 1'' or 1'13'' the Q14 has 12V output to trigger the relay, so I'm wondering could you help to review the schematic and give us some comments. thanks.
|
1 |
2’59’’ |
|
2 |
2’44’’ |
|
3 |
2’58’’ |
|
4 |
2'30’’ |
|
5 |
2’44’’ |
|
6 |
2’59’’ |
|
7 |
2’54’’ |
|
8 |
2’26’’ |
|
9 |
1’13’’ |
|
10 |
0’01’’ |
|
11 |
2’56’’ |
|
12 |
0’01’’ |
|
13 |
2’55’’ |
|
14 |
0’01’’ |
|
15 |
2’27’’ |
