I have a charger from day one while charging has never switched from the charge mode (RED LED) to the COMPLETED CHARGE (GREEN LED)?? It appears to charge the battery.? After a few hours I have a battery charged to around 8.3 volts.
The charger uses a HXN-WS chip.? The other number on the chip looks like e4969 or e4959.?? i still could be wrong.
So far all the electrical connections seem to be good based on using an ohm meter going point to point.???
Anyone else come across this problem???? I have a friend who purchased a DM-1801 with CH1801 charger and his works perfectly.?? His circuit board and mine look identical except his chip looks like it could be a HXN-WS e4975.??? Searching everywhere I could not find this IC but did find plenty of HXN-WS with different eXXXX numbers.?? Schematic looks identical to what 's called a SC6038 except on mine pins 7 (CS), pin 1 (VIN) and pin 6 (EN) are all tied together.?? The SC6038 circuit shows a R6 10K resistor in series with pin 6.?? Pin 6 (EN) needs a high to turn on the chip so I don't think its an issue with a direct short to VIN.?? It appears to charge so it must be turned on.
With no battery but charger powered up it's my understanding it's suppose to flash RED/GREEN with the LED.? Mine only flashes RED.
At this point I am thinking a defective IC since it appears to never switch from CHARGE to COMPLETE.
Interested in hearing any comments.??? I was thinking of just scrapping the circuit board and go with a TP5100 board.?