34
KX-TG4753B/KX-TG470B/KX-TGA405B
10.1.2. Flow Chart (Range Extender)
Cross Reference:
Check Power
(P.34)
Check Link
(P.41)
Check the RF part
(P.42)
10.1.3. Check Power
10.1.3.1. Base Unit and Range Extender
Cross Reference:
Power Supply Circuit/Reset Circuit
(P.12) for Base unit.
Power Supply Circuit
(P.24) for Range extender.
Circuit Board (Base Unit_Main)
(P.85).
Circuit Board (Range Extender)
(P.93).
Note:
BBIC is IC501.
(*1) Refer to
Specifications
(P.6) for part number and
supply voltage of AC adaptor.
(*2) Refer to
Circuit Board (Base Unit_Main)
(P.85).
Power ON Range Extender
OK
Check Power
OK
Link
Check Link
Range
Check the RF part
Not Link
Power ON with pressing "1", "6" and "#" of Handset
NG
Not working
Is the AC Adaptor inserted into AC outlet? (*1)
Is output voltage of AC adaptor 5.5 V?
YES
Check
AC Adaptor.
Check VDDC (1.2 V): Test Point [VDDC]
OK
Check
Power Supply Circuit
.
NO
NO
NO
NO
RSTN: Reset = "High"?
YES
Check
Reset Circuit
.
Check Xtal CLK = 13.824 MHz?
YES
Check X501.
Check BBIC.