Panasonic KX-TG234SK, Service Manual

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36
KX-TG234SK/KX-TGA470B
10.1.5. Check Link
10.1.5.1. Base Unit
Cross Reference:
Power Supply Circuit/Reset Circuit (P.12)
Check the RF part (P.38)
Note:
*1 How to 3.0V:
Execute the command "VDA"
Refer to
Things to Do after Replacing IC or X'tal (P.58) for Base Unit.
*2 How to adjust the frequency of X501:
To see the frequency, execute the command “SFR“, then check the TP_CKM (IC501-57pin).
To adjust frequency, send command “SFR
“until the frequency counter becomes13.824 MHZ±55HZ.
Check around Power Supply Circuit .
3.0V voltage to 3.0 V.
Does Base Unit make link with normal working
Handset?
Check around X501 and RF module and adjust
clock frequency.
NO
NO
NO
NO
YES
YES
Is the voltage of VBAT about 3.0 V?
Check the RF part
Does the RF clock (CLK) oscillate at 13.824 MHz in
Base Unit Test Mode?
YES
Is the voltage of VDDC about 1.2 V?
Is the voltage of +3.0V about 3.0 V?
YES
YES
Base Unit is OK. Check Handset.
NO
OK
*1
*2