30
KX-TG3661JXM/KX-TG3662JXM/KX-TG3668JXM/KX-TG3669JXM/KX-TGA365JXM
10.1.7. Check Link
Cross Reference:
Power Supply Circuit
(P.11) for Bade Unit
Power Supply Circuit
(P.16) for Cordless Handset
Adjustment of Base Unit
(P.41)
Adjustment of Cordless Handset
(P.46)
Check around
Power Supply Circuit
.
Adjust 1.8V(BB1.8V) voltage to 1.8V.
Refer to
Adjustment of Base Unit
.
Does Base Unit make link with Cordless Handset?
(Correct working unit)
Check around X1 and RF module and adjust
clock frequency.
Refer to
Adjustment of Base Unit
.
NO
NO
NO
YES
YES
Replace with a new Circuit Board.
RF module VRF-GND: 3.3V?
Does the RF clock (RFCLK) oscillate: 10.368MHz in
Base Unit Test Mode?
Refer to
Adjustment of Base Unit
.
Is the voltage of 1.8V (BB1.8V) about 1.8V?
YES
YES
Base Unit is OK. Check Cordless Handset.
NO
OK
NG
Base Unit
Check around
Power Supply Circuit
.
Does Cordless Handset make link with Base Unit?
(Correct working unit)
Check around X1 and RF module and adjust
clock frequency.
Refer to
Adjustment of Cordless Handset
.
NO
NO
NO
NO
NO
NO
Is the voltage of Bandgap about 1.8V?
Refer to
Adjustment of Cordless Handset
.
RF module (VCC) Pin6 3.2V?
YES
YES
YES
YES
Replace with a new Circuit Board.
Is the voltage of C714 of both ends of land
about 2.5V?
Does the RF clock (RFCLK) oscillate: 10.368MHz
in Cordless Handset Test Mode?
Refer to
Adjustment of Cordless Handset
.
Cordless Handset is OK. Check Base Unit.
YES
YES
Adjust the voltage to 1.8V.
Refer to
Adjustment of Cordless Handset
.
Cordless H andset