Check Power - Panasonic KX-TG6841B Service Manual

10.1.1. Check Power

10.1.1.1. Base Unit
Is the AC Adaptor inserted into AC outlet? (*1)
Is output voltage of AC adaptor 5.5 V?
Check VDDC (1.2 V): Test Point [VDDC]
RSTN: Reset = "High"?
Check Xtal CLK = 13.824 MHz?
Check BBIC.
Cross Reference:
Power Supply Circuit/Reset Circuit (P.13)
10.1.1.2. Handset
Is the battery inserted to BATT+ and BATT-?
Is the voltage of TP-VBAT 2.3 V more?
Is the voltage of TP 3.0 V about 3.0 V?
Is the voltage of TP VDDC about 1.2 V?
Does BBIC (IC1: 36) oscillate at 13.824 MHz?
Check BBIC (IC1).
Cross Reference:
Power Supply Circuit/Reset Circuit (P.21)
YES
OK
YES
YES
YES
YES
YES
YES
YES
KX-TG6841B/KX-TG6842B/KX-TG6843B/KX-TG6844B/KX-TG6845B/KX-TG6873B/KX-TGA680B
NO
AC Adaptor.
Check
NO
Check Power Supply Circuit.
NO
Check Reset Circuit.
NO
Check X501.
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.75).
NO
Check the battery and around BATT+ and
BATT- are not shorted.
NO
Check Power Supply Circuit/Reset Circuit.
NO
NO
Check X1, C52, C53.
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