Panasonic KX-TGC220AL Service Manual

Also see for KX-TGC220AL: Operating instructions

Panasonic KX-TGC220AL Service Manual Manual pdf 38 page image

38KX-TGC220/KX-TGC222/KX-TGC223/KX-TGCA209.1.12. Bell Reception9.1.12.1. Base Unit*1 TGC220 only9.1.12.2. HandsetCross Reference:Telephone Line Interface (P.14)Check Link (P.30)How to Check the Handset Speaker or Receiver (P.58)9.1.13. Check TAM OperationNote:(*1) When replacing FLASH MEMORY (IC601), TAM data need to be written to it. Refer to Base Unit of Things to Do afterReplacing IC or X'tal (P.55)When bell signal is coming, is there bell soundsignal at BBIC (IC501:CIDINp, CIDINn)?NO Check around IC501 (VDD_PA), C506, C472, C473,C477, C478, R477, R478YESCheck around C103, C104, C105, C106, C107,C109, C110, C111, C113, R101, R102, R103, R104,R109, R110, R111, R112, P101NOWhen bell signal is coming, is there bell soundsignal at IC501 (SPP, SPN)?*1Does the bell sound from SPEAKER?Check around SP+, SP- .When bell signal coming, is there bell sound signalat BBIC (IC1: 35, 37)?NONOYESWhen bell signal coming, is there bell sound signalat SP+, SP- ?YESCheck BBIC (IC1), C78, C79, R77, R76.NOCheck cable of SPEAKER and resistance valueof SPEAKER.Check IC601 and BBIC (IC501) of Base Unit. (*1)Is there a TAM icon on the Handset display? Turn on the Answering System.Check Power Supply Circuit.NONOYESIs the voltage of VDD3 of Base Unit about 3.0 Vand VDD1 about 1.8 V, VDD4 about 3.0 V,VDD5 about 3.0 V?YES