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KX-TGE240/242/243/244/245/260/262/263/264/270/272/273/274/275/TG454/TG465/TGEA20/TGA20
10.1.1. Check Power
10.1.1.1. Base Unit
Cross Reference:
Power Supply Circuit/Reset Circuit (P.15)
Note:
BBIC is IC501.
(*1) Refer to Specifications (P.7) for part number and
supply voltage of AC adaptor.
(*2) Refer to Circuit Board (Base Unit_Main) (P.85).
10.1.1.2. Handset
Cross Reference:
Power Supply Circuit/Reset Circuit (P.23)
Is the AC Adaptor inserted into AC outlet? (*1)
Is output voltage of AC adaptor 5.5 V?
YES
Check AC Adaptor.
Check VDD1(1.8V) :Test point (VDD1)
OK
Check Power Supply Circuit.
NO
NO
NO
NO
RSTN: Reset = "High"?
YES
Check Reset Circuit.
Check Xtal CLK=10.368MHz?
YES
Check X501.
Check BBIC.
Check Power Supply Circuit/Reset Circuit.
Check X1, C52, C53.
Is the voltage of TP 3.0 V about 3.0 V?
Is the voltage of TP-VBAT 2.3 V more?
Check the battery and around BATT+ and
BATT- are not shorted.
Is the battery inserted to BATT+ and BATT-?
Does BBIC (IC1: 36) oscillate at 13.824 MHz?
YES
YES
YES
NO
NO
NO
Is the voltage of TP VDDC about 1.2 V?
NO
YES
Check BBIC (IC1).
YES
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