Panasonic KX-TGC210LAB Service Manual page 34

KX-TGC210LAB/KX-TGC212LAB/KX-TGC213LAB/KX-TGC220LAB/KX-TGC222LAB/KX-TGC223LAB/KX-TGCA20LAB
10.1.5.2. Handset
Does Handset make link with Base Unit?
(Correct working unit)
NO
Is the voltage of "1.8V" about 1.8 V?
YES
Is the voltage of CP3V about 3.0 V?
YES
Is the voltage of CP4V about 4.0V?
(When LED is ON)
YES
Is the voltage of CP2.8V about 2.8 V?
YES
Does the RF clock (CLK) oscillate: 10.368 MHz
in Handset Test Mode?
YES
Check the RF part.
Cross Reference:
Power Supply Circuit/Reset Circuit (P.13)
Check the RF part (P.35)
Note:
(*1) Refer to Troubleshooting by Handset (P.32)
To see the frequency, execute the command "SFR", then check the TP_CKM (IC1-55pin).
To adjust frequency, send command "SFR
Refer to Things to Do after Replacing IC or X'tal (P.53) for Handset.
YES
Handset is OK. Check Base Unit.
NO
Adjust 1.8V voltage to 1.8 V.
OK
Check around Power Supply Circuit/Reset Circuit .
NO
NO
Check BBIC (IC1)
NO
Check D3
NO
Check around X1 and adjust clock frequency.
" until the frequency counter becomes10.368 MHz±55HZ.
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NO