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Kenwood TK-270G service manual TK-260G/270G TK-260G/270G, Block Diagram

Models: TK-270G

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TK-260G/270G TK-260G/270G

BLOCK DIAGRAM


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Page 47

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Kenwood TK-270G service manual TK-260G/270G TK-260G/270G, Block Diagram

Contents

TK-260GTK-270G M market models are shown CONTENTSSERVICE MANUAL TK-260G/270GTK-260G/270G SERVICEORDERING REPLACEMENT PARTS PERSONNEL SAFETYePower switch/ Volume control OPERATING FEATURES1. Operation Features wLED indicatoroSP/MIC jacks 2. Programmable keysu, •, 2,3 keys iDTMF keypadDescription 3. Display TK-270Gonly4. Scan Operating TK-270Gonly Icon3 Scan Stop Condition 5. Details of Features5 Priority Channel Setting 1 Time-outtimer10 Battery Save 6. Option Signalling DTMF/2 tone4 Battery Warning 7 TOT Reset Time7. Audible user feedback tones OPERATING FEATURES / REALIGNMENT2. How to Enter Each Mode 3-1.For the panel Tuning Mode4. Checksum 5-2.Connection procedure6-2.Connection procedure REALIGNMENTREALIGNMENT 7. Clone Mode6-4.Function TK-260G/270GTK-260G/270G 8.1 Self programming mode setting8-2.Channel Setting Mode 8. Self Programming Mode TK-270GonlyNo. Function Choices TK-260G/270GREALIGNMENT REALIGNMENT 8-3.Function Setting ModeFunction Setting Mode TK-260G/270GNo. Function TK-260G/270GREALIGNMENT REALIGNMENT 8-4.Memory Reset ModeTK-260G/270G Separating the chassis from the unit • TK-260G DISASSEMBLY FOR REPAIRSeparating the case assembly from the chassis TK-270G2. Receiver 1. Frequency configurationFig. 1 Frequency configuration CIRCUIT DESCRIPTION6Squelch 7Receive signaling3. PLL frequency synthesizer 5Audio amplifier circuit3 UNLOCK DETECTOR 5. Power supply4Encode signaling 4. Transmitter System1Frequency shift circuit 3 Low battery warning6. Control Circuit 7. Optional Board Terminal8. CONTROL SYSTEM Pin connection diagramBlock diagram CIRCUIT DESCRIPTION/SEMICONDUCTOR DATAShift register 2:BU4094BCFVIC6 SEMICONDUCTOR DATAMicroprocesser : 30622M4102GP TX-RXUNIT : IC13 Shift register 1:BU4094BCFVIC5TK-260G/270G DESCRIPTION OF COMPONENTSDISPLAY UNIT X54-3250-10 TK-270GOnly TX-RXUNITTK-260G/270G PARTS LISTTK-260G/270G DISPLAY UNIT X54-3250-10 TK-270GonlyTK-260G/270G TX-RXUNIT X57-5870-XX -10:TK-260GK,M11:TK-270GK -21:TK-270GM PARTS LISTC173 PARTS LISTTK-260G/270G Ref. No PARTS LISTTK-260G/270G RK73GB1J100J PARTS LISTTK-260G/270G R232 PARTS LISTTK-260G/270G TK-260G/270G EXPLODED VIEW TK-260GTK-260G/270G EXPLODED VIEW TK-270GTK-260G/270G PACKINGTest Equipment Required for Alignment ADJUSTMENTThe following parts are required for adjustment 1. Antenna connector adapterTest Mode TK-270Gonly Test mode operating featuresRepair Jig Extention Flat cable : part No E37-0851-05TK-260G/270G H.P.O.W. .1. ON : NarrowV.Q.T ADJUSTMENTTK-260G/270G Common SectionTransmitter Section ADJUSTMENTF.Q.T ADJUSTMENTTK-260G/270G 14.DQT ADJUSTMENTTK-260G/270G TK-260G/270G ADJUSTMENTVR1 : Frequency adjustment Fig. 2 Adjustment pointsFoil Side View ADJUSTMENTDISPLAY UNIT X54-3250-10Foil Side View PC BOARD VIEW TK-260G/270GDISPLAY UNIT X54-3250-10Component Side View PC BOARD VIEW TX RX UNIT X57-5870-XXComponent Side View0-10:TK260GK,M, 0-11:TK-270GK, 0-21:TK-270GM TK-260G/270GTX-RXUNIT TX RX UNIT X57-5870-XXFoil Side ViewPC BOARD VIEW TK-260G/270G 0-10:TK260GK,M, 0-11:TK-270GK, 0-21:TK-270GM0-10:TK260GK,M, 0-11:TK-270GK, 0-21:TK-270GM TK-260G/270G PC BOARD VIEW0664 TK-260G SCHEMATIC DIAGRAMTK-270G SCHEMATIC DIAGRAM TK-260G/270G TK-260G/270G BLOCK DIAGRAMSPECIFICATIONS LEVEL DIAGRAMKNB-14/KNB-15A Ni-CdBATTERY CIRCUIT DIAGRAMKMC-17Speaker microphone KMC-17Parts ListKMC-21Parts List OPTIONSKENWOOD CORPORATION SPECIFICATIONGeneral TK-260G/270G