DM-1801 charger (CH1801)
Posted: Wed Jul 28, 2021 3:54 pm
Would anyone have a schematic of the CH1801 charger. My charger stays in the Charge mode. Never switches from RED to GREEN
indicating CHARGE COMPLETE. It's been that way from day one but just assumed I never charged long enough.
Charging it for more than 10 hours still doesn't change. The battery measures around 8.3 volts when removed
from the charger and seems to last a long time. I tried tracing the etch and came up with something schematic wise
that is 99% the same as a what's called a SC6038. The only difference is they run the EN pin through a 10K to the D.C
input instead of just connecting it directly to D.C. input. EN high turns the chip on. Would appreciate anyones experience with
the CH1801 and if a schematic is available just in case I missed something.
Guessing it's the HXN-WS chip is bad. Might try a TP5100 charger board in the near future.
Ken
indicating CHARGE COMPLETE. It's been that way from day one but just assumed I never charged long enough.
Charging it for more than 10 hours still doesn't change. The battery measures around 8.3 volts when removed
from the charger and seems to last a long time. I tried tracing the etch and came up with something schematic wise
that is 99% the same as a what's called a SC6038. The only difference is they run the EN pin through a 10K to the D.C
input instead of just connecting it directly to D.C. input. EN high turns the chip on. Would appreciate anyones experience with
the CH1801 and if a schematic is available just in case I missed something.
Guessing it's the HXN-WS chip is bad. Might try a TP5100 charger board in the near future.
Ken