Sansui-TU-X701-Service-Manual(1) 电路图 维修手册.pdf

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1、 RadioFans.CN 收音机爱 好者资料库 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-X701 10. DESCRIPTION OF ICs, TC9306 AND CXP5014 11 . INTERIOR BLOCK DIAGRAM OF ICs - LC7217 (PLL Synthesizer) -TC9306-007 .: Digital Tuning System Control;:. o,;2 (f)(f)U(f) :; Q.Q. w Z C( - 0 6 ;,: . ;: N N M M Q.Q.

2、 . 45 44 43 42 41 40 39 26 25 ,:! 24 VDD COM1 S27 S26 S25 S24 S23 S22 REF iNT iNH TEST Xl GND VDD COM2 .54 Serial Interface I/O Port Driver ,. m (f)(f)(f) (f) (f) (f) (f) (f) (f) (f) (f) (f) (f) (f) (f) . TC9306-007 .: Terminal Function;:. Pin No.Pin Name Function COM1Terminal for outputting common

3、signals to FL COM2display driver IC. Note: The output is fixed at L level automat- ically when the system is reset or ex- ecuting CK STP instruction. 1- 21S7-S27Terminals for outputting segment signals to FL 55-S1-display driver IC. A control of a maximum of 54 segments is possible on the basis of m

4、atrix with COM1 and COM2,Data are outputted through these terminals when SEG instruction (COM1 system) or MARK instruction (COM2 system) is executed. Note:The output is fixed at L level when the system is reset or excuting CK STP instruction. -CXP5014 .: FL Display Driver;:. N_OO -r: xxxoz-w-x ;: Q.

5、Q.Q.-ZC(Zzwxo ;:;nUg(j)U Q.Q.Q.Q.Q. - -LC3450 (MPX) 6 s 6 6 5 5 58 Pin No.Pin NameFunction 24-KO-Ports for inputting a 4-bit key matrix signal. On the other hand, key return timing signals are outputted from output ports TO to T6. 28 - 34TO - T6Ports for outputting key matrix return timing signals.

6、A 4-bit signal is outputted from TO to T3, while a 3-bit signal is outputted from T4 to T6. AID INTerminals for inputting analog signals to 4-bit DC.REFbuilt-in AID converter. The built-in AID con- verter is of successive comparison type in de- pendence upon program, A reference voltage is inputted

7、through DC.REF and an analog con- parison voltage is inputted through AID IN. MUTEA port for outputting 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 o

8、utput), SO (serial data output), and SI(serial data input), LC7217 PLL IC is controlled by executing SIO instruction, Terminal for outputting a reference frequency signal supplied to LC7217 PLL IC. Note: This output is fixedat L level auto- matically when INH input is at L level. INTTerminal for inp

9、uttingystem resetting sig- nal to device. When INT is at L level, the device is reset; when at H level, program starts beginning from address No,O. This ter- minal is usually fixed at H level, because the device is reset when a voltage of 4.5V is ap- plied to VDD. (power-on reset) TESTTerminal for i

10、nputting a test mode control sig- nal.The device is returned to the ordinary operation at L level or in NC status. This terminal includes a pull-down resistor and is fixed at L level usually. Terminals for connecting a quartz oscillator of 7.4 MHz. GNDGND Terminal VDDTerminal for applying a device s

11、upply 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 2V.Further, when a voltage of 4.5V is applied to this terminal, the device is reset and then program starts begin- ning from address No.O (power-on reset). 0 1ij :i :;

12、d -TA7302P (FM IF Amp. l01 jlPC1163H (FM IF Amp. -LA1245 (AM Tuner) . CXP5014 .:Terminal Function;: POl XDUT PD2 LCTR OUTD OUT! OUT2 OUT3 OUT. OUTS OUT6INO INI -LA1235 (IF Amp.Detector.Muting. Signal Meter Drive) vcc 7 )U ; S. Metee -NjM2043D (OP Amp. I ) Vcc Pin No.Pin NameilO Description PX3, PDO-

13、Terminal for inputting a FL display indicator PCO-3, PFO-driving signals. PEO-3, PBO- PAO- 62-PXO- COM2Terminal for inputting common signal for FL display. 26,VDD Terminals for applying a device supply voltage. GNDGND Terminal 28 - 43S1-S15Terminals for outputting segment signals to FL display. 46-T

14、5 - TOTerminals for outputting grid signals to FL display, VFDPTerminal for connecting a supply voltage (- to filament of FL display. DUTYTerminal for setting a display mode for FL display. Norminally this terminal is kept in L level. , XTTerminal for connecting a quartz oscillator of 3.6 MHz. RESET

15、Terminal for inputting a reset signal. COM1Terminal for inputting common signal for FL display. A-OUT Iv + z. B - OUT 6 B- IN V- 4 5 B+IN Top View SANSUI ELECTRIC CO LTD, SANSUI ELECTRONICS CORPORATION: 14-, Izumi 2-chome, Suginami-ku, Tokyo 168 japan PHONE: (03! 324-8891 /TELEX: 232-20.76 IInternat

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