Manual No. 085-3435-07 36/45 IGB/IGX Series (Overseas Specifications) Service Manual
(4) Connector XJ3
This connector is not used.
Pin No. Signal Name
1 FG
2 GND
3 TxD
4 RxD
5 DTR
6 Buzzer
(5) Program Memory Media
Mask ROM 256KB (Writing or replacement is not possible)
There is no compatibility between the IGB Series main board (PS-018) and the IGX Series main
board (PS-016). However, basic operations are same for these models.