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KX-TG4221N/KX-TG4222N/KX-TG4223N/KX-TG313SK/KX-TG4224N/KX-TG4225N/KX-TGA421N
10.1.1. Check Power
10.1.1.1. Base Unit
Cross Reference:
Power Supply Circuit/Reset Circuit (P.13)
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.69).
10.1.1.2. Handset
Cross Reference:
Power Supply Circuit/Reset Circuit (P.21)
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.
Check Power Supply Circuit/Reset Circuit.
Check X1.
Is the voltage of TP 1.8 V about 1.8 V?
Is the voltage of TP-BATTERY 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 (IC5: 9,10) oscillate at 10.368 MHz?
YES
YES
YES
NO
NO
NO
Is the voltage of 36 Pin (IC5) about 2.3 V more?
NO
YES
Check BBIC (IC5).
YES
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