Technics-SA110-rec-sm 电路图 维修手册.pdf

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1、O R D E R NO. S D 8 3 0 1 2 3 6 3 C 8 Service Manual eb 5.- W,! ooe.r tB f H( 000, f i ii.;|6! i , .b G.: FM/AM Stereo Receiver SA-110 EX,EH,XA,XL SA-110 (K) EX,EH Areas * T h e colors of this model included silver and black. * The black type model is provided with ( K ) in the Service Manual. * EX

2、is available in Switzerland and Scandinavia. * E H is available in Holland. * X A l is available in Southeast Asia, Oceania, Africa, Middle Near East and Central South America. * X L is available in Australia. Specifications (Specifications are subject to change without notice for further improvemen

3、t.) (DIN 45 500) ; s/N rated power ( 4 0 ) AMPLIFIER SECTION P H O N O T A P E / A U X 70 d B ( I H F , A: 73 d B ) 88 d B ( I H F , A: 95 dB) 40 H z 2 0 kHz continuous power output - 2 6 d B power ( 4 0 ) both channels driven 2 X 20W ( 4 0 ) P H O N O 64 d B 2 X 20W ( 8 0 ) T A P E / A U X 66 dB 40

4、 H z 1 6 kHz continuous power output 50 mW power ( 4 0 ) both channels driven 2 X 2 0 W ( 4 0 ) P H O N O 62 d B 2 X 20W ( 8 0 ) T A P E / A U X 62 d B 1 kHz continuous power output , , Tone Controls both channels driven 2 X 20W ( 4 0 ) B A S S 50 Hz, +10 d B - - 1 0 d B ii-.j.iini ernu 2 X 20W ( 8

5、0 ) T R E B L E 20 kHz, +10 d B - - 1 0 d B Total harmonie distortlon L o u d n e s s control (built in) rated power at 40 H z 2 0 kHz 0.8% ( 4 0 ) 0.5% ( 8 0 ) volume at - 3 0 d B Output voltage and impedance 50 Hz, + 5 d B rafed power at 40 H z 1 6 kHz 0.8% ( 4 0 ) T A P E R E C O U T 150 mV 0.5%

6、( 8 0 ) C h a n n e l balance, T A P E / A U X 250 Hz6,300 Hz +1 d B rated power at 1 kHz 0.5% ( 4 0 ) C h a n n e l separation, T A P E / A U X 1 kHz 55 d B 0.5% ( 8 0 ) Headphones output level and impedance 390 m V / 3 3 0 O half power at 1 kHz 0.07% ( 8 0 ) Load impedance 4 0 1 6 0 26 d B power a

7、t 1 kHz 50 mW power at 1 kHz 0 . 1 % ( 4 0 ) 0.12% ( 4 0 ) FM TUNER SECTION Intermodulation distortlon Frequency range 8 7 . 5 - 1 0 8 . 0 M H z rated power at 250 Hz: 8 kHz=4:1, 4 0 0.8% Sensitivlty rated power at 60 Hz: 7 kHz=4:1, S M P T E , 8 0 0 . 5 % S / N 30 d B 1.9 yuV (300O), 1.3/iV ( 7 5 0

8、 ) Power bandwidth S / N 26 d B A.7 fjV (300O), 1.2/yV ( 7 5 0 ) both channels driven, - 3 d B 10 H z 3 0 k H z ( 4 0 ) S / N 20 d B 1.5/yV (300O), 0.9 yuV ( 7 5 0 ) Damping factor 15 ( 4 0 ) , 30 ( 8 0 ) IHF usable sensitivlty 1.9 fiV ( I H F 58) Input sensitivlty a n d impedance IHF 46 d B stereo

9、quieting sensitivlty 22 V / 7 5 0 P H O N O O , . . , n - i 2.5 m V / 4 7 k O Total harmonie distortlon T A P E / A U X 150 m V / 1 8 k O M O N O 0.15% P H O N O maximum input voltage (1 kHz, R M S ) 130 mV S T E R E O 0.3% Frequency response S / N P H O N O R I A A Standard curve M O N O 60 d B (76

10、 d B , I H F ) +0.8 dB (30 H z 1 5 k H z ) S T E R E O 58 d B (70 d B , I H F ) T A P E / A U X (at vol. max.) 5 H z 7 0 k H z ( - 3 d B ) Frequency response 20 H z - 1 5 kHz, +1 d B - - 2 d B T e c h n i c s Matsushita Electric Trading Co., Ltd. P.O. Box 288, Central Osaka Japan RadioFans.CN 收音机爱 好

11、者资料库 SA-110 Alternate channel selectlvity (+400 kHz) 60 d B AM TUNER SECTION Capture ratio Image rejection at 98 MHz IF rejection at 98 MHz Spurlous response rejection at 98 MHz AM suppresslon 1 d B 40 d B 60 d B 70 d B 50 d B Frequency range Sensitivlty (S/N 20 dB) Selectlvity Image rejection at 1,

12、000 kHz IF rejection at 1,000 kHz 5 2 5 - 1 6 0 5 kHz 20 300zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ijNIm 27 d B 40 d B 55 d B Stereo separation J 1 kHz 10 kHz * Frequency range Sensitivlty (S/N 20 dB) Selectlvity Image rejection at 1,000 kHz IF rejection at 1,000 kHz Stereo separation

13、J 1 kHz 10 kHz * 40 d B 30 d B GENERAL Carrier leak ; - j ; - 19 kHz :i . i A Z 3 Power consumptlon 160W Carrier leak ; - j ; - 19 kHz :i . i A Z 3 -33 d B - 3 5 d B , I H F ) Power supply 38 kHz -50 d B - 5 0 d B , I H F ) For Australia A C 50 Hz/60 Hz, 240V Channel balance (250 Hz6,300 Hz) 1.5 d B

14、 For Continental Europe A C 50 Hz/60 Hz, 220V Limiting point : 1.2 A,V For others A C 50 Hz/60 Hz, 110V/120V/220V/240V Bandwidth Dimensions ( W X H X D ) 430 X 97 X 243 m m IF amplifier 180 kHz 16-15/16 X 3-13/16 X 9-9/16) FM demodulator 1000 k H z Weight 4.9 kg Antenna terminals 300O (balanced) (10

15、.8 Ib.) 7 5 0 (unbalanced) (10.8 Ib.) CONTENTS Page L O C A T I O N O F C O N T R O L S 2 3 B E F O R E R E P A I R A N D A D J U S T M E N T 3 D I S A S S E M B L Y I N S T R U C T I O N S 4 5 D I A L C O R D I N S T A L L A T I O N G U I D E 5 M E A S U R E M E N T S AND A D J U S T M E N T S 6 7

16、C I R C U I T B O A R D S A N D W I R I N G C O N N E C T I O N D I A G R A M 8 9 I LOCATION OF CONTROLS Page R E S I S T O R S and C A P A C I T O R S 10 B L O C K D I A G R A M 11 12 S C H E M A T I C D I A G R A M 13 16 E X P L O D E D V I E W 17 18 R E P L A C E M E N T P A R T S LIST 19 20 V o

17、l u m e I F M muting/FM mode selector ( M. o n / F M auto, o f f / F M mono Power1 I Headphones Jack Tone Controls- -Stereo indicator T u n i n g indicator T u n i n g control a i -Band selector ( M. F M , A M ) phono- 1 tuner- Input selector T a p e monitor M source, tape/aux) 2 RadioFans.CN 收音机爱 好

18、者资料库 SA-110 aidOfTOUflT8Hi YJaMai Loop antenna terminal| AM antenna terminal FM antenna terminals- 300f2 O- Ground terminal (GND) tsfridBO rh gvoms- ot woH ) AC outlet (Unswitched) Speaker terminals- ) Voltage selector (on the bottom board) * The power supply for this unit varies depending upon th a

19、reas. Also,the parts used for power supply are different. So, refer to the circuit diagram and the replacement parts list. * XA area is provided with voltage selector and AC outlet. * 240V (50/60HZ) for Australi. * 220V(50/60Hz) for Continental Europa. * 110V/120V/220V/240V (50/60Hz) for other area.

20、 XA area. - V BEFORE REPAIR AND ADJUSTMENT Turn off the power supply and short-circuit both ends of power supply capacitors (C701, C702 4700juF) at resistance (about lOrZ, 5W) in order to discharge the charged voltage, Avoid short-circuit with a screwdriver or the like, otherwise the transistors or

21、diodes may break down. Before turning on the power supply after completion of repair, slowly apply the primary voltage by using a voltage regulator to make sure that the current consumed is free of abnormality. The current consumed at 50Hz/60Hz in no signal mode is shown below with respect to supply

22、 voltage 110/120V/220V/240V. Power supply voltage AC110V AC120V AC220V AC240V Current consumed 50 Hz 120 300mA 100 240mA 5 0 - 150mA 40 120mA Current consumed 60 Hz 120 260mA 100 240mA 50 150mA 40 120mA r 3 RadioFans.CN 收音机爱 好者资料库 SA-1 1 0 DISASSEMBLY INSTRUCTIONS How to remove the cabinet 1. Remove

23、 the 6 setscrews (Fig. 1:00|)of the cabinet. How to remove the bottom board 1. Remove the cabinet. 2. Remove the 11 setscrews (Fig. 2 : 0 ) of the bottom board. O Reor panel Fig. 2 How to remove the front panel 1. Remove the cabinet. 2. Remove the 3 setscrews (Fig. 1: ) of the front panel. 3. The cl

24、aws projected (at 4 portions) from the front panel are engaged with the front sub-panel. Disengage the claws from by screwdriver or the like to remove the front sub-panel. (See Fig. 3) Power amplifier IC - Fig. 4 ! How to remove the power amplifier IC 1. Remove the cabinet and bottom board. 2. Remov

25、e the 2 setscrews (Fig. 4 : , ) to detach the power transformer from rear panel in the direc- tion of arrow. 3. Unsolder of power amplifier IC. 4. Remove the 2 setscrews (Fig. 4 : , ) used to secure the power amplifier IC on the heat sink, and then pull the power amplifier IC. 5. When mounting the p

26、ower amplifier IC, apply silicone compound or equivalent heat diffuser to the rear side of power amplifier IC, and then follow the steps 1 4 reversely. SA-110 8Ti4zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA,3MeUiaA QUA 8TM3. How to remove the slide volume. 1. Remove the cabinet and bottom b

27、oard. 2. Set the dial pointer to the start position (minimum frequency), then stick a cellophane tape to the contact o dial cord (Fig. 5) so that the dial drum will not come loose from the dial cord. 3. Remove the 1 setscrew (Fig. 5 : ) from the Dial drum. , . . 4. Remove the dial cord from the pull

28、ey. (Fig. 5 : 0) 5. Remove the 3 setscrews (Fig. 6 : ) and 2 connectors (Fig. 6 : , ) 6. Remove the front panel in the direction of the arrowas in Fig 7. 7. The claws projected (at 4 portions) from the slide printed circuit board are engaged with the slide volume. , ,. , . Disengage the claws from b

29、y screw driver or the like to remove the slide volume case. (Fig. 8) 8. Unsolder the slide volume. #1, i, Fig. 6 Cellophane tape Fig. 5 - - - _ - 1 1 1 1 |iiiiroiiii,i-iiiiiiiizyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA 1 Fig. 7 Slide volume case. Slide volume DIAL CORD INSTALLATION GUIDE W

30、hen setting the cord, follow the procedure given below 1. The cord should be at least 180 cm long. 2. Completely turn the tuning gang (variable capacitor) counterclockwise (Variable condenser capacity: max. Frequency; min.) 3. Make a knot at the cord and as shown in Fig. 9. 4. Set the spring to the

31、knot, and set the cord in the order of 1 11. Note: At step 8, puil the cord strongly, slacken the spring up to the mark of the durm, then go to steps 9 11 to set the cord. 5. Fix the cord terminal with adhesive. 6. Cut off the cord about 5 mm at its either end. Less than 1.5cm Fig. 9 Tuning shaft SA

32、-110 MEASUREMENTS AND ADJUSTMENTS Note: A M OSC Coil L201) and A M I FT (T202) have been already adjusted, and require no adjustment. AM ADJUSTMENT * Setting and Equipment used 1. AC electronic voltmeters (VTVM) . 5, Output of signal generator shouid be no higher than necessary to 2. AM signal gener

33、ator (AM-SG) obtain an output reading. 3. Set Band selector to A M position. 6. Use a non-metal screwdrjver for the adjustment. 4. Maintain line voltage at 1 20 volts. AM SIGNAL GENERATOR DIAL SETTING PREPARATIONS PARTS ADJUSTED ADJUSTING PROCEDURE CONNECTION FREQUENCY DIAL SETTING PREPARATIONS PART

34、S ADJUSTED ADJUSTING PROCEDURE AM-RF ADJUSTMENT Connect AM-SG to AM antenna terminal through 200pF capacitor referring to Fig. 10. (Weak input) 600kHz (30% Mod. with 400H2) 600kHz Connect AC VTVM or scope to speaker terminal of the set. L205 (ANT Coil) L206 (OSC Coil) 1. Adjust for maximum output. C

35、onnect AM-SG to AM antenna terminal through 200pF capacitor referring to Fig. 10. (Weak input) 1500kHz (30% Mod. with 400Hz) 1500kHz Connect AC VTVM or scope to speaker terminal of the set. CT204 (OSC Trimmer) CT203 (ANT Trimmer) 1. Adjust for maximum output. 2. Repeat steps (1) and (2). FM ADJUSTME

36、NT 5. Set band selector to F M position. 6. FM muting/FM mode switch . off/FM mono. 7. Other setting are the same as in AM adjustment. * Setting and Equipment used 1. FM signal generator (FM-SG) . . 2. Oscilloscope. 3. DC electronic voltmeters (VTVM). 4. Frequency counter (19kHz and 108MHz measurabl

37、e). * FIV1 signal generator (FM-SG) 1. The Standard input of the set is 60dB (1 mV), 400Hz 100% modulation (Because of attenuation, using coaxial cables, SG output must be 6dB Plus. That is, when input is 60dB, SG output is to be 66dB.) FM SIGNAL GENERATOR DIAL SETTING PREPARATIONS PARTS ADJUSTED AD

38、JUSTING PROCEDURE CONNECTION FREQUENCY DIAL SETTING PREPARATIONS PARTS ADJUSTED ADJUSTING PROCEDURE FM IF ADJUSTMENT Connect FM-SG to FM antenna terminal referring to Fig. 11 (Apply 60dB to antenna terminal) 100MHz (100% Mod. with 400Hz) 100MHz Connect DC VTVM to between tOTn and iJMM through choke

39、coil (Refer to Fig. 11.) T201 (Discri. IFT) 1. Adjust T201 core so that voltage measured in signal mode is OmV in 1 50mV range. FM-RF ADJUSTMENT * Connect and Q Connect FM-SG to FM antenna terminal referring to Fig. 11 (Apply 60dB to antenna terminal) 90MHz (100% Mod. with 400Hz) weak input 90 MHz C

40、onnect scope to speaker terminal L204 (OSC Coil) L202 (RF DET Coil) Add weak input so that noise is included in the output waveform. Make the adjustment so that the output wave form is vertically symmetrical. (Fig. 13) Repeat the steps (4) and (5) until the frequency correctly matches the dial scale

41、. Connect FM-SG to FM antenna terminal referring to Fig. 11 (Apply 60dB to antenna terminal) 106MHz (100% Mod. with 400Hz) weak input. 106 MHz Connect scope to speaker termina CT202 (OSC Trimmer) CT201 (RF DET Coil) Add weak input so that noise is included in the output waveform. Make the adjustment

42、 so that the output wave form is vertically symmetrical. (Fig. 13) Repeat the steps (4) and (5) until the frequency correctly matches the dial scale. FM MPX V.C.0. ADJUSTMENT USING A FREQUENCY COUNTER USING ALTERNATE SYSTEM 1. 1 OOMHz 60dB Non-modulated mono signal applied to set. 2. FM muting/FM mo

43、de switch to on/FM auto. 3. Connect frequency counter to mtOU through resistor (lOOkn). 4. Adjust VR301 to 19kHz 30 Hz. (Fig. 12) 1. Apply stereo signal from generator or stereo station to tuner. 2. Adjust VR301 until stereo indicator lights up. Cement arm of VR301 as shown in Fig. 14. Check points

44、Overload detection circuit 0 Connect 4 load to speaker terminal. (2) Add 1kHz signal from the low frequency oscillator to the set and adjust the sound volume control knob so that the output voltage is 5 volts. (3) Connect 3.3Q, (2W) load to speaker terminal. Make sure that no output is delivered. *

45、If protection circuit turns OFF due to overload, the circuit and load will not restore their normal conditions uniess power suppiy is once turned OFF and again turned ON. 6 SA-110 AM signal generator (AM-SG) Oscilloscope e ToGNDi To AMANT fcXcapacin -Copacitor (200pF) J o O O O e Fig. 10 DC VTVM FM

46、signal generotor (FM-SG) 175/1) _ 9 0 0 0 ( To GND C o FM antenna terminal (752) Fig. 11 FM signal generator (FM-SG) Fig. 12 Coil(IOOjUH) (SL0XI0I-2D1 Frequency counter r Noise AF output wave form Fig. 13 A - B , D - E : Stereo OFF Posltion. B-D: Stereo ON Position. (indicator Lighting) C: Adjust Po

47、int of Pilot Circuit. Fig. 14 Adjustment points AM ANT trimmer 500kHz AM OSC col 600kHz MPX VCO adj. AM IFT coi NO ADJUSTMENT FM OSC coi 90MH2 FM I F T coi R E A R AM OSC trimmer 1500kHz AM OSC coil NO ADJUSTMENT FM DET trimmer 06MHz FM OSC trimmer z SA-110 RESISTORS Metal Film 25 : 1/4W SI : 1/2W 1

48、 : 1W J : 5% Numbering System of Capacitor Example ECKD 1H 102 IVI Voltage 50 Value M Tolerance R47 Type E C E A Type Voltage Pecullarity use Value Special use Peculiarity R Capacitor Type Voltage Tolerance Capacitor Type ECEA Type Others Tolerance ECEA : Electrolytic I A lOV 1H : 50V DC C 0.25pF ECCD : Ceramic IC 16V 2H : 500V DC J 5% E C K D : Ceramic IE 25V KC : 400V A C K 10% ECQM : P