Sony-STS3000ES-tun-sm 电路图 维修手册.pdf

《Sony-STS3000ES-tun-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Sony-STS3000ES-tun-sm 电路图 维修手册.pdf（20页珍藏版）》请在收音机爱好者资料库上搜索。

1、 1 AEP Model SPECIFICATIONS MICROFILM FM STEREO FM-AM TUNER ST-S3000ES SERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 2 SECTION 1 GENERAL TABLE OF CONTENTS 1. GENERAL .2 2. TEST MODE .3 3. ELECTRICAL ADJUSTMENT.4 4. DIAGRAMS 4-1.Waveforms.7 4-2.IC Block Diagrams . 8 4-3.Schematic Diagram Main Section . 9 4-

2、4.Printed Wiring Board Main Section . 13 4-5.Printed Wiring Board Power Board Section . 15 4-6.Schematic Diagram Power Board Section . 16 4-7.Printed Wiring Board Display Section . 17 4-8.Schematic Diagram Display Section . 19 4-9.IC Pin Function IC701 System Control (PD780205GF) . 21 5. EXPLODED VI

3、EW .23 6. ELECTRICAL PARTS LIST .24 SAFETY-RELATED COMPONENT WARNING ! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL

4、 OR IN SUPPLEMENTS PUBLISHED BY SONY. Location of Parts and Controls 45678109111213 132 1 POWER button 2 TUNING/SELECT button 3 TUNING/SELECT+ button 4 DISPLAY button 5 CHARACTER button 6 ANTENNA button 7 BAND button 8 MEMORY button 9 MENU ENTRY MENU button 10 MENU ENTRY RETURN button 11 MENU ENTRY

5、ENTER button 12 TUNE MODE button 13 SHIFT button RadioFans.CN 收音机爱 好者资料库 3 1. Circuit Check Mode Set to the reception frequency that the circuit can STEREO RDS stations. (Set the input level to above 70 dB.) This enables circuit check to be performed in any of the reception modes-FM, AM (MW, LW). Se

6、t to a desired band before setting the test mode. 1. Turn OFF the power. 2. While pressing ENTER and BAND together, turn ON the power. The items in the following table will be checked automatically in order every 2 seconds. SECTION 2 TEST MODE Tuned IF Frq Sig Level Stereo RDS Signal AST signal =LOW

7、 IF COUNT OK SI LEVELh70dB ST signal=LOW RDS DATA OK OK or NG OK or NG OK or NG OK or NG OK or NG OK or NG OK or NG IC251 NG, RV251 adjustments FE101, IC251 NG, or IF count buffer amp (Q251, Q401) NG IC221 NG, RV221 adjustments IC301 NG, RV301 adjustments IC801 NG NGDisplayItems FM RDSAM (MW, LW) DI

8、SPLAY NOTE : The preset data will be erased when this test mode is used. Therefore, take down the data before setting this mode and preset the data again after completing operations in this mode. 2. FLUORESCENT INDICATOR TUBE Check and KEY Check mode 1. Turn OFF the power. 2. While pressing ENTER an

9、d RETURN together, turn ON the power. 3. While continuously pressing ENTER and RETURN together, check the following. Indication test pattern * The indication test patterns from 2 to 5 are indicated on only even grids. The display changes every 1 sec. 1 7F p p p p p p p p p p p p p p p p p p p p p p

10、p p p p p p p p p p p p p 2 60 p p p p p p p p p p p p p p 3 7E p p p p p 4 3D p p p p p p p p p p 5 5F p p p p p Microcomputer version indication (1 sec) n All light up “7F” n Dot area only “60” n Dot area only “7E” Dot area only “5F” N Dot area only “3D” N N RadioFans.CN 收音机爱 好者资料库 4 4. Release EN

11、TER and RETURN . The KEY CHECK mode will be set. 5. All key numbers will be displayed. Key Number : 12 6. Each time the key is pressed, the key number will be counted down. Each key will be counted only once, at the first time. 7. When all keys have been pressed, the process will end. NOTE : As cont

12、ents of the Factory Preset will be written into memory after completing this check mode, delete contents of memory according to 4. Forced RESET. 3. Entering the Factory Preset (In case perform just to write memory of the Factory Preset.) 1. Turn OFF the power. 2. While pressing ENTER and MEMORY toge

13、ther, turn ON the power. 4. Forced RESET (Used to delete the contents of Factory Preset when it is written into the preset memory.) Clears all the RAMs and sets the initial state 1. Turn OFF the power. 2. While pressing ENTER and ANTENNA together, turn ON the power. 3. When “All clear” is indicated

14、on the display tube. SECTION 3 ELECTRICAL ADJUSTMENTS Precautions in Repairing If the front end unit fails, it is difficult to repair the inner circuits, so replace the entire front end unit. Set “IF : WIDE” after the all adjustments. FM SECTION0dB = 1V Standard Setting of FM Stereo RF Signal Genera

15、tor. STEREO STANDARD SIGNAL MONAURAL STANDARD SIGNAL Carrier frequency: 98MHz Modulation: Audio 1kHz Main channel (L+R):33.75kHz deviation Sub channel (LR):33.75kHz deviation Pilot:7.5kHz deviation Carrier frequency: 98MHz Modulation : Audio 1kHz 75kHz deviation FM RF SSG 1 kHz highpass filter disto

16、rtion meter FM ANTENNA (75)LINE OUT set How to switch IF BAND : WIDE/NARROW and ANT ATT : ON/OFF Method: 1. Press the power button to turn the power on and set to FM. 2. Press the MENU button and press the TUNING/SELECT , + button to indicate “Reception” on the fluorescent display tube, then press t

17、he ENTER button. 3. Press the TUNING/SELECT , + button to indicate “ATT/IF Band”, and press the ENTER button. 4. “ANT ATT: OFF” is indicated on the fluorescent display tube and press the TUNING/SELECT , + button to indicate “ON” or “OFF”, then press the ENTER button. When the ANT ATT is set, “ANT AT

18、T” is indicated on the fluo- rescent display tube. 5. “IF: Wide” is indicated on the fluorescent display tube, and press the TUNING/SELECT , + button to indicate “Wide” or “Nar- row”, then press the ENTER button. When the “IF: Narrow” is set, “NARROW” is indicated on the fluorescent display tube. 6.

19、 Set WIDE after the operation. 5 FM Discriminator ADJUSTMENT (NULL and MONO Distortion Adjustment) Setting : IF BAND : WIDE ANT ATT : OFF FM RF SSG 1 kHz highpass filter distortion meter FM ANTENNA (75)LINE OUT Modulation:Monaural Standard signal Output level: 6mV (76dB) (at 75 open) Procedure : 1.

20、Tune the set to 98 MHz. 2. Adjust IFT252 for 0V reading on the digital voltmeter. . NULL 3. Adjust IFT253 for a minimum reading on the distortion meter. . MONO Distortion (THD) 4. Repeat the adjustments of 2 and 3 several times. Note : When replacing the ceramic filter, perform this alignment. TP251

21、 NULL terminal Digital Voltmeter (DC range) set Stereo Level Adjustment Setting : IF BAND : WIDE ANT ATT : OFF FM RF SSG set FM ANTENNA (75) Modulation:Stereo Standard signal Output level: 18V (25dB) (at 75 open) Procedure : 1. Tune the set to 98 MHz. 2. Adjust RV251 to the point (moment) when the “

22、STEREO” indicator will change from going off to going on. FM RF SSG set FM ANTENNA (75) Modulation:Stereo Standard signal Output level: 18V (25dB) (at 75 open) Narrow Gain Adjustment Setting : IF BAND : NARROW ANT ATT : OFF Procedure : 1. Tune the set to 98 MHz. 2. Set “IF BAND : NARROW” according t

23、o the procedure of “How to switch IF BAND WIDE/NARROW” on page 6. 3. Adjust RV231 to the point (moment) when the “STEREO” indi- cator will change from going off to going on. FM Meter Level Adjustment Setting : IF BAND : WIDE ANT ATT : OFF FM RF SSG FM ANTENNA (75) Modulation:Stereo Standard signal O

24、utput level: 3mV (76dB) (at 75 open) Procedure : 1. Tune the set to 98 MHz. 2. Press DISPLAY button to display the digital signal, then adjust RV221 to be displayed as “SIG 70dB”. Stereo Separation Adjustment Setting : IF BAND : WIDE set FM RF SSG FM ANTENNA (75) set LINE OUT level meter Modulation:

25、Stereo Standard signal Output level: 6mV (76dB) (at 75 open) Procedure : 1. Refer to “How to switch IF BAND WIDE/NARROW” on page 6. FM stereo Signal generator Output channel Level meter connection Level meter reading (dB) L-CHL-CHA B Adjust RV301 for minimum reading on Level meter R-CHL-CH R-CHR-CHC

26、 D Adjust RV301 for minimum reading on Level meter L-CHR-CH L-CH Stereo separation : A - B R-CH Stereo separation : C - D The separations of both channels should be equal. 6 AM SECTION AM Meter Level Adjustment Setting : BAND : LW loop antenna AM RF SSG AM antenna terminal (TM1) loop antenna (Suppli

27、ed accessories) Field strength dB (V/m) = SSG output level dB (V/m) 26dB. 30% amplitude modulation by 400Hz signal Carrier frequency: 216kHz Modulation: AUDIO 400Hz, 30% modulation Procedure : 1. Set AM RF signal generator so that the AM antenna input level becomes 74dB/m. 2. Adjust RV402 so that 1

28、to 10 indication bars light up on the signal meter. Adjustment Location MAIN BOARD Component Side 60cm set FE101 RV402 AM Meter Level RV301 Stereo Separation RV231 Narrow Gain RV251 Stereo Level IFT253 (THD) IFT252 (NULL) CNP701 IFT252, 253 FM Discriminator RV221 FM Meter Level 7 8 4-1. WAVEFORMS4-2

29、. IC BLOCK DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) NOTE : parts extracted from the component side. : parts extracted from the conductor side. : Pattern from the side which enable seeing. NOTE A

30、ll capacitors are in F unless otherwise noted. pF : F 50WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4W or less unless otherwise speci- fied. : Internal component. : nonflammable resistor. : panel designation. 36 11 25814 1415129101613 7 FM IF AMP L

31、IMITER AF/NULL METER QUADRATURE DET AF AMP IF OFF NULL METER SHORTING LEVEL DET METER DRIVE MUTING CIRCUIT DETUNE DET GND B+ IC401 LA1245 36925814710 18151219161320171411 AM RF AMPAM IF AMP AM MIXING AGC AM OSC GND B+ (RF) AM DET METER DRIVE B+ (IF) 1 FM/AM SELECT MUTING FM/AM SELECT CONTROL LOGIC /

32、 MUTE ON/OFF MUTING OUT LAMP DRIVE PLL VCCGND MPX 2221 20 19 18 17 1615141312 234567891011 IC301 LA3401 IC221, 251 LA1235 1234 REG GND CONTROL REG 567 IC901 LA5667 TEST LOGIC AND OUTPUT SELECTOR SWITCH QUALITY BIT GENERATOR OSCILLATOR AND DIVIDER RECONSTRUCTION FILTER 57KHz BANDPASS (8th ORDER) ANTI

33、- ALIASING FILTER COSTAS LOOP VARIABLE AND FIXED DIVIDER CLOCKED COMPARATOR CLOCK REGENERATION AND SYNC 161514131211109 12345678 REFERENCE VOLTAGE DIFFERENTIAL DECODER BIPHASE SYMBOL DECODER Vp1 QUAL RDDA VREF MUX VDDA VSSA CIN SCOUT RDCL T57 OSCO OSCI VDDD VSSD TEST TSTLD IC801 SAA6579 SECTION 4 DI

34、AGRAMS IC801 ! 4.332MHz MAIN SECTION 1 3.2Vp-p IC701 ! X2 4.2MHz DISPLAY SECTION 1 5.2Vp-p B+: B+ Line B: B Line : adjustment for repalf Voltage and waveforms are dc with respect to ground under no- signal conditions. no mark : FM MW: ( ) LW: *: Can not be measu Voltages are taken with a VOM (Input

35、impedance 10M). Voltage variations may be noted due to normal production toler- ances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production toler- ances. Circled numbers refer to waveforms. Signal path. : FM : AM Note:The components identified by mark ! o

36、r dotted line with mark ! are critical for safety. Replace only with part number specified. 21 22 4-9. IC PIN FUNCTION IC701 SYSTEM CONTROL (uPD780205GF) Pin No.Pin NameI/OFunction 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 VDD ANT

37、ATT BAND1 BAND2 IF-B N.C. MONO TUN RESET X2 4.19MHz GND N.C. LOCK VDD CLK DATA D-IN CE BLN ST CAL AST AVSS MUTE EON PGM DATA RDS R2 KEY 2 KEY 1 SI AVDD AVREF RIN R1 RDS CLK POWER GND I O I I O O I O I I O I I I I I I I I Power supply (+5V). Not used. Not used. Not used. Not used. Not used. Not used.

38、 Not used. Not used. System reset input. Oscillation signal output (4.19MHz). Oscillation signal input (4.19MHz). Ground. Not used. Lock signal input. Power supply (+5V). PLL clock to FE101. PLL data to FE101. PLL data from FE101. PLL latch to FE101. Not used. Stereo display detection. Not used. Aut

39、o stop signal detection. Ground. (Analog) Muting signal output. Not used. Not used. RDS data input. Not used. Key input. Key input. Signal input. Analog power supply (+5V). Reference voltage (+5V). Remote control input. Not used. RDS data clock input. Power supply ON/OFF monitor. Ground. I/OFunction

40、Pin No.Pin Name 41 42 43 44 45 46 47-78 79 80-83 84,85 86-100 IS 5 IS 4 IS 3 IS 2 IS 1 VDD P1-P32 V LOAD P33-P36 P37.16G 15G-1G I I I I I O O O Model detection. Power supply (+5V). Drives indication tube. Power supply (30V). Drives indication tube. Not used. Drives indication tube. 23 SECTION 5 EXPL

41、ODED VIEWS NOTE: Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference number in the exploded views are not supplied. Hardware (# mark) list and accessories and pack- ing

42、 materials are given in the last of this parts list. The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark * 144-923-873-01BRACKET, CORD STOPPER * 153-346-265

43、-11HOLDER, PC BOARD * 16A-4398-428-A MAIN BOARD, COMPLETE * 173-332-563-01BRACKET (P) * 181-666-121-11TRANSFORMER BOARD * 193-703-244-00BUSHING (2104), CORD 203-704-515-11SCREW (BV/RING) * 214-986-255-01PLATE, TOP * 224-986-468-01PANEL (TOP) 233-703-929-01SPACER, SWITCH FL7011-517-177-21INDICATOR TU

44、BE, FLUORESCENT !PC9011-558-568-21CORD, POWER 14-960-910-31SCREW, ORNAMENTAL 24-989-920-11PANEL, FRONT 3X-4948-552-2PANEL (BASE) ASSY 4X-4947-892-1FOOT ASSY * 54-986-466-01BRACKET (SIDE) 61-773-040-11WIRE (FLAT TYPE) (17 CORE) * 7A-4398-429-A DISPLAY BOARD, COMPLETE * 84-921-941-01CUSHION (FL) * 94-

45、945-292-01HOLDER, INDICATION TUBE 104-951-620-01SCREW (2.6X8), +BVTP 11X-4947-759-1BUTTON ASSY, POWER * 121-665-360-11AC.SW BOARD * 134-989-921-12PANEL, BACK 1 1 5 11 12 10 7 10 18 9 2 3 1 6 4 17 4 13 15 1 19 8 14 20 22 22 1 16 1 15PC901 #4 #4 #4 #4 #4 #5 #4 #4 #3 #1 #4 #4 not supplied not supplied

46、FL701 not supplied not supplied #4 #5 21 23 5 123 #3 #2 #2 #2 #4 24 SEMICONDUCTORS In each case, u: , for example: uA.: A., uPA.: PA., uPB.: PB., uPC.: PC., uPD.: PD. CAPACITORS uF : F COILS uH : H Due to standardization, replacements in the parts list may be different from the parts specified in th

47、e diagrams or the components used on the set. -XX, -X mean standardized parts, so they may have some difference from the original one. Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. RESISTORS All resistors are in ohms METAL: Metal-film resistor METAL OXIDE: Metal Oxide-film resistor F : nonflammable The component