Sansui-TUX701-tun-sm 维修电路原理图.pdf

《Sansui-TUX701-tun-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Sansui-TUX701-tun-sm 维修电路原理图.pdf（16页珍藏版）》请在收音机爱好者资料库上搜索。

1、 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 TU-X701 TU-X70110. DESCRIPTION OF ICs, TC9306 AND CXP501411 . INTERIOR BLOCK DIAGRAM OF ICs- LC7217 (PLL Synthesizer)-TC9306-007 .: Digital Tuning System Control;:.o,;2(f)(f)U(f):;Q.Q.w ZC( -0 6;,:. ;: NN M M Q.Q. . 45 44 43 42 41 40 3926 25 ,:! 24 VD

2、DCOM1S27S26S25S24S23S22REFiNTiNHTESTXlGNDVDDCOM2 .54SerialInterfaceI/O PortDriver,.m(f)(f)(f)(f) (f) (f) (f) (f) (f) (f) (f) (f) (f) (f) (f). TC9306-007 .: Terminal Function;:.Pin No.Pin NameFunctionCOM1Terminal for outputting common signals to FLCOM2display driver IC.Note: The output is fixed at L

3、level automat-ically when the system is reset or ex-ecuting CK STP instruction.1- 21S7-S27Terminals for outputting segment signals to FL55-S1-display driver IC. A control of a maximum of54 segments is possible on the basis of matrixwith COM1 and COM2,Data are outputtedthrough these terminals when SE

4、G instruction(COM1 system) or MARK instruction (COM2system) is executed.Note:The output is fixed at L level whenthe system is reset or excuting CK STPinstruction.-CXP5014 .: FL Display Driver;:.N_OO -r:xxxoz-w-x;:Q.Q.Q.-ZC(Zzwxo&J;:;nUg(j)UQ.Q.Q.Q.Q.-LC3450 (MPX) 6 s 6 6 5 5 58Pin No.Pin NameFunctio

5、n24-KO-Ports for inputting a 4-bit key matrix signal.On the other hand, key return timing signalsare outputted from output ports TO to T6.28 - 34TO - T6Ports for outputting key matrix return timingsignals. A 4-bit signal is outputted from TO toT3, while a 3-bit signal is outputted from T4to T6.AID I

6、NTerminals for inputting analog signals to 4-bitDC.REFbuilt-in AID converter. The built-in AID con-verter is of successive comparison type in de-pendence upon program, A reference voltageis inputted through DC.REF and an analog con-parison voltage is inputted through AID IN.MUTEA port for outputting

7、 a mute control signal.Note: This outputet to L level automat-ically when INH input changes from to L or vice versa.STBSerial interfaces fo.r STB (strobe pulse output)LC7217, CK (serial clock output), SO (serialdata output), and SI(serial data input),LC7217 PLL IC is controlled by executing SIOinstr

8、uction,Terminal for outputting a reference frequencysignal supplied to LC7217 PLL IC.Note: This output is fixedat L level auto-matically when INH input is at L level.INTTerminal for inputtingystem resetting sig-nal to device. When INT is at L level, thedevice is reset; when at H level, programstarts

9、 beginning from address No,O. This ter-minal is usually fixed at H level, because thedevice is reset when a voltage of 4.5V is ap-plied to VDD. (power-on reset)TESTTerminal for inputting a test mode control sig-nal.The device is returned to the ordinaryoperation at L level or in NC status. Thistermi

10、nal includes a pull-down resistor and isfixed at L level usually.Terminals for connecting a quartz oscillator of7.4 MHz.GNDGND TerminalVDDTerminal for applying a device supply voltage.In the normal operation, a voltage of 5V, 1 0%is applied; but in back-up condition, the vol-tage can be reduced to 2

11、V.Further, when avoltage of 4.5V is applied to this terminal, thedevice is reset and then program starts begin-ning from address No.O (power-on reset).0 1ij :i:; d -TA7302P (FM IF Amp.l01jlPC1163H (FM IF Amp.-LA1245 (AM Tuner). CXP5014 .:Terminal Function;:POlXDUTPD2LCTROUTD OUT! OUT2 OUT3 OUT. OUTS

12、 OUT6INO INI-LA1235 (IF Amp.Detector.Muting.Signal Meter Drive)vcc7 )U;S. Metee-NjM2043D (OP Amp.I ) VccPin No.Pin NameilODescriptionPX3, PDO-Terminal for inputting a FL display indicatorPCO-3, PFO-driving signals.PEO-3, PBO-PAO-62-PXO-COM2Terminal for inputting common signal for FLdisplay.26,VDDTer

13、minals for applying a device supplyvoltage.GNDGND Terminal28 - 43S1-S15Terminals for outputting segment signals toFL display.46-T5 - TOTerminals for outputting grid signals to FLdisplay,VFDPTerminal for connecting a supply voltage (-to filament of FL display.DUTYTerminal for setting a display mode f

14、or FLdisplay.Norminally this terminal is kept in L level., XTTerminal for connecting a quartz oscillatorof 3.6 MHz.RESETTerminal for inputting a reset signal.COM1Terminal for inputting common signal for FLdisplay.A-OUT Iv +z. B - OUT6 B- INV- 45 B+INTop ViewSANSUI ELECTRIC CO LTD,SANSUI ELECTRONICS

15、CORPORATION:14-, Izumi 2-chome, Suginami-ku, Tokyo 168 japanPHONE: (03! 324-8891 /TELEX: 232-20.76 IInternational Division!1250 Valley Brook Ave, Lyndhurst, N,j, 07071 U,17150 South Margay Ave, Carson, Calitornia 90746 U,3036 Koapaka Street, Honolulu, Hawaii 96819 U.Unit 10A, Lyon Industrial Estate,

16、 Rockware Avenue, Greenford, Middx U86, OAA, EnglandPaul Ehrich Strasse 8, 6074 Rodermark 2, West GermanyHEi*J,&J11) -It-I:AHtjjtJ11) *l:B=liImTif8-9-16(T18l) ,ii0422-46-8131SAN SUI ELECTRONICS (U,I LTD,SANSUI ELECTRONICS G,LlJ7./(5tlttt.tSAN SUI(SM2-Printed in Japan (1987,07,M) Stock No, 36531500)0