According to the scheme, it is JT3028 or OB2269 or OB2268. Chips JT3028, OB2268 and OB2269 are analogues.
The Lenoxx CA-318, CA-310, CA-311, CA-316, CA-320 models have JT3028 or OB2268 or OB2269 chips.
Change U4, R4, R70, MOSFET U6, EC1 and resistor R32.
JT3028 = OB2268 = OB2269.
JT3028
СКАЧАТЬ JT3028 :
JT3028.pdf
СКАЧАТЬ LENOXX+CA-310A :
LENOXX+CA-310A.pdf
СКАЧАТЬ Lenoxx+CA-318B+-+Esquema++informatvo :
Lenoxx+CA-318B+-+Esquema++informatvo.pdf
СКАЧАТЬ LENOXX-CA-311 :
LENOXX-CA-311.pdf
СКАЧАТЬ Lenoxx+CA-320 :
Lenoxx+CA-320.pdf