Trouble shooting chart |
The power can not be on or off
The power can’t be
on or off
Go
Check the power supply | No |
on the power board is |
|
normal. |
|
Yes |
|
Repair the power board
Check if the XS301 on the front board to XP82 on the decoder board is in good contact.
Yes
Whether the connection to K303 is broken.
Yes
Whether there is 0V and 3.3V voltage difference on Pin 95 PCON of U1.
Yes
No
No
No
Check/Correct connection
Correct the connection
Replace U1.
