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Case1: OK
AC power on
PIO01
0.06sec
1.4sec
Case2: NG1(fail to reset BT_IC)
AC power on
PIO01
1.4sec
Case3: NG2 (fail to receive of UART signals)
AC power on
PIO01
1.4sec
Case4: NG3 (fail to transmit of UART signals)
AC power on
PIO01
1.4sec
Cross Reference:
Schematic Diagram (Base Unit_RF) (P.74)
Note:
(*2) After replacing, need to adjust the frequency of BT.
Refer to Things to Do after Replacing IC or X'tal (P.62)
3.6sec
2.8sec
If BT_IC does not work, 1st and 2nd signals does not
appear.
If BT_IC fails to receive of UART, 2nd signal does not turn
to HIGH.
If BT_IC fails to transmit of UART, 2nd signal does not turn
to LOW.
KX-TG7741S/KX-TG7742S/KX-TG7743S/KX-TGA470S
47
Check the circuit of around
POWER and RESET parts
of BT Module.
Check the circuit of around
UART communication (*1) of
main board and BT module.
still NG
Replace BT module (*2)
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