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KX-TG3711BX/KX-TG3712BX/KX-TG3719BX/KX-TGA371BX
10.1.3.2. Handset
Cross Reference:
Power Supply Circuit/Reset Circuit
(P.20)
Check the RF part
(P.37)
Note:
*1 3.0V can be adjusted along with bandgap voltage adjustment.
Refer to
Adjustment of Handset
(P.51).
*2 How to adjust the frequency of X1:
To see the frequency, execute the command “SFR“, then check the TP_CKM (IC1-57pin).
To adjust frequency, refer to
Adjustment of Handset
(P.51).
Check around
Power Supply Circuit/Reset Circuit
.
3.0V Vottage to 3.0V
Does Handset make link with Base Unit?
(Correct working unit)
Check around X1 and RF module and adjust
clock frequency.
NO
NO
NO
NO
Is the voltage of TP BAT about 2.2~2.8 V?
Is the voltage of TP 1.8V about 1.8 V?
YES
YES
YES
YES
Is the voltage of TP CP3.0 about 3.0 V?
Does the RF clock (CLK) oscillate: 10.368 MHz
in Handset Test Mode?
Handset is OK. Check Base Unit.
YES
OR
Check the RF part
Check the batteries.
*1
*2