Kenwood TK-8150 Service Manual

Also see for TK-8150: Specifications Specifications Instruction manual Instruction manual Service manual

Contents

TK-815011INSTALLATION9. Special Instructions for Replacing theFinal Amplifier Q5To replace the Final Amp Q5, ensure to follow the instruc-tions given below:9-1. C77 and C78 Positions1. Ensure to solder C77 and C78 to securely contact Q5.Note : The TX power may vary depending on the positionof C77 and C78.9-2. Soldering1. Ensure to solder C77 and C78 with the earth spring legs asillustrated in Fig. 9-3.Note : Use excessive solder to make it thicker than thethe electrodes of the chip.2. Solder the terminals until the electrodes of the chip arefully covered. (Refer to Fig. 9-1.)Note : Use excessive solder to make it thicker than thethe electrodes of the chip. (Refer to Fig. 9-2.)3. To solder the source side of C78 (FET Q5 source side),solder the earth springs until they are fully covered. (Referto Fig. 9-4.)C77,C78NGC77,C78OKC77,C78NGC77,C78OKPCBTop viewSide viewC77C77C78C78Q5Metal plate Metal plateSolder SolderSolderElectrodeConnect with solderThe C77 and C78 mustcontact securely theQ5 packageOKTop viewC77C78Q5The C77 and C78 mustcontact securelythe Q5 packageFig. 9-1Fig. 9-2Fig. 9-3Fig. 9-4