Panasonic KX-TGF340B Service Manual page 49

Case1: OK
AC power on
PIO01
0.05s
1.5s
Case2: NG1(fail to reset BT_IC)
AC power on
PIO01
1.5s
Case3: NG2 (fail to receive of UART signals)
AC power on
PIO01
1.5s
Case4: NG3 (fail to transmit of UART signals)
AC power on
PIO01
1.5s
Cross Reference:
Schematic Diagram (Base Unit_RF) (P.80)
Note:
(*2) After replacing, need to adjust the frequency of BT.
Refer to Things to Do after Replacing IC or X'tal (P.65)
KX-TGF340/KX-TGF342/KX-TGF343/KX-TGF344/KX-TGF345/KX-TGF372/KX-TGF373/KX-TGF374/KX-TGF375/KX-TG585/KX-TGFA30
1.95s
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.
s
49
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)