| Electronics > Repair |
| Weller WHA-300 repair |
| (1/2) > >> |
| pienari:
I have looked schematics for the WHA-300 but not found. Heater works. Fan is dead. I tested fan motor with external ac psu and it works fine. Anyone have this hot air station? |
| pienari:
I have tested all diodes and transistors ok. I replaced all ic. 2pcs thyristors are ok. To do list. SMD resistor values ?? SMD capacitors ?? |
| Andy Watson:
--- Quote from: pienari on October 08, 2024, 01:54:38 pm ---I replaced all ic. --- End quote --- What types of chip? Are any of them microcontrollers? |
| Bryn:
Regarding the capacitors, make sure they're not damaged. Have you checked the power supply of the fan also? That could be an issue also, if it's not receiving much power from it. |
| pienari:
I have to get board powered and make some measurements. There is no microcontrollers. Fuses are ok. Optocouplers i need to remove from board and test. |
| Navigation |
| Message Index |
| Next page |