Kenwood TK-190 Service Manual

Also see for TK-190: Pricing and specification manual Service manual Service manual Instruction manual Instruction manual

Contents

21TK-1902. D/A Converter : M62354GP (TX-RX Unit IC1)2-1. Terminal connection2-2. Block diagram12345678DoLDCLKDIAo1Ao2NCGND161514131211109VCCVDDAo6Ao5Ao4Ao3NCASSM62354GP8 bitR-2R+SegmentD-A converter8 bitR-2R+SegmentD-A Converter+ –+ – + –8 bitLatch8 bitLatch+ –+ –+ –D11D10D9D8D7D6D5D4D3D2D1D0AddressDecoder....... .....12 bit Shift RegisterCh1 Ch2LLLLD-ABufferOP amp1 2 4 5 6 839111213141516D-A D-A D-ACh6 Ch5 Ch4 Ch3(6)(6)V CC VDD Ao6 Ao5 Ao4 Ao3 VSSGNDAo 2Ao1DICLKLDDoSEMICONDUCTOR DATA2-3. Terminal functionPin No. Symbol I/O Function1 Do O 12-bit shift register MSB bit data isoutput.2 LD I When the LD is at the high level,the 12-bit shift register value isloaded to the D/A output register.3 CLK I Shift clock input. With the rise ofthe shift clock, the input signal fromthe DI is input to the 12-bit shiftregister.4 DI I Serial data input. Input serial data12 bits long.5,6 AO1, AO2 O 8-bit resolution D/A.7 NC – Not connected.8 GND – GND.9 Vss – Terminal for determining the D/Aconversion reference low side pointlevel.10 NC – Not connected.11~14 AO3~AO6 O 8-bit resolution D/A.15 VDD – Terminal for determining the D/Aconversion reference up side pointlevel.16 Vcc – Power supply.3. LCD Driver : LC75824W (Control unit IC101)3-1. Block diagramCommondriver Segment Driver & LatchShift RegisterClockGeneratorAddressDetectorDICLCEVDD1VDD2INHOSCVDDVSSCOM4COM3COM2COM1S51S50S13S12/P12S2/P2S1/P1................... ........3-2. Terminal functionPin No. Name I/O Active Function1~12 S1/P1~S12/P12 O – Segment output for displaying13~51 S13~S51 data transferred from serial data.52~55 COM1~COM4 O – Common driver output.Frame frequency fo=(fosc/512)Hz56 VDD – –57 VDD1 I – Apply 2/3 the LCD drive biasvoltage from outside. If 1/2 thebias is applied, connect to VDD2.58 VDD2 I – Apply 1/3 the LCD drive biasvoltage from outside. If 1/2 thebias is applied, connect to VDD1.59 VSS – –60 OSC I/O – Oscillation terminal.61 INH I L Force the display to turn offregardless of internal data. Serialdata can be input regardless ofwhether it is "H" or "L".62 CE I H Chip enable. Serial data transferterminal. Connected to themicroprocessor.63 CL I ± Synchronizing clock. Serial datatransfer terminal. Connected tothe microprocessor.64 DI I – Transfer data. Serial data transferterminal. Connected to themicroprocessor.