Service Manual

Page 6.16
6 ~ CIRCUIT DIAGRAMS
APPENDIX A - ACCESSORY CONNECTOR
The following table details the connections on the accessory connector.
Connection Signal Name Use Signal type Direction
2.5mm Tip MIC1 Multi-function, audio in,
ancillary type voltage
and key press voltage.
0-5V To Radio
2.5mm Ring EXT_LS1A Balanced Speaker Drive Nominal Mid Supply To Accessory
2.5mm Sleeve EXT_LS1B Balanced Speaker Drive Nominal Mid Supply To Accessory
3.5mm Tip RXD1_IN RS232 RxD in or IIC
SDA or trickle charge
input.
0V to 5V
0V or –12V Space
5V or +12V Mark
Bi-directional
3.5mm Ring TXD1_OUT RS232 TxD out or IIC
SCL or 5V supply output
(50mA maximum.)
0-5V To Radio
3.5mm Sleeve 0VA Ground 0V To Accessory