Sony-TAN1-pwr-sm 维修电路原理图.pdf
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1、1TA-N1SPECIFICATIONSSTEREO POWER AMPLIFIERSERVICE MANUALUS ModelCanadian ModelAEP ModelUK ModelE ModelAustralian ModelMICROFILMRadioFans.CN 收音机爱 好者资料库2TABLE OF CONTENTS1. SERVICE NOTE. 32. GENERAL.53. ELECTRICAL ADJUSTMENT. 74. DIAGRAMS4-1. Circuit Boards Location. 74-2. Schematic Diagram Main L Sec
2、tion .84-3. Printed Wiring Board Main L Section . 94-4. Schematic Diagram Main R Section . 104-5. Printed Wiring Board Main R Section . 114-6. Schematic Diagram Input Section .124-7. Printed Wiring Board Input Section . 134-8. Schematic Diagram Power Section . 144-9. Printed Wiring Board Power Secti
3、on . 155. EXPLODED VIEWS5-1. Top and Back Panel Section.165-2. Front Panel Section . 165-3. Heat Sink Section. 175-4. Bottom Plate and Frame Section. 186. ELECTRICAL PARTS LIST .19SAFETY CHECK-OUTAfter correcting the original service problem, perform the follow-ing safety checks before releasing the
4、 set to the customer:Check the antenna terminals, metal trim, “metallized” knobs, screws,and all other exposed metal parts for AC leakage. Check leakage asdescribed below.LEAKAGEThe AC leakage from any exposed metal part to earth Ground andfrom all exposed metal parts to any exposed metal part havin
5、g areturn to chassis, must not exceed 0.5 mA (500 microampers). Leak-age current can be measured by any one of three methods.1. A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers instructions to use theseinstruments.2. A battery-operated AC milliammeter. The
6、 Data Precision 245digital multimeter is suitable for this job.3. Measuring the voltage drop across a resistor by means of a VOMor battery-operated AC voltmeter. The “limit” indication is 0.75V, so analog meters must have an accurate low-voltage scale.The Simpson 250 and Sanwa SH-63Trd are examples
7、of a pas-sive VOM that is suitable. Nearly all battery operated digitalmultimeters that have a 2V AC range are suitable. (See Fig. A)Fig. A. Using an AC voltmeter to check AC leakage.0.15FTo Exposed MetalParts on Set1.5kACvoltmeter(0.75V)Earth GroundSAFETY-RELATED COMPONENT WARNING !COMPONENTS IDENT
8、IFIED BY MARK ! OR DOTTED LINEWITH MARK ! ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTSWHOSE PART NUMBERS APPEAR AS SHOWN IN THISMANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMP
9、OSANTS IDENTIFIS PAR UNE MARQUE ! SURLES DIAGRAMMES SCHMATIQUES ET LA LISTE DESPICES SONT CRITIQUES POUR LA SCURIT DEFONCTIONNEMENT. NE REMPLACER CES COMPOSANTSQUE PAR DES PICES SONY DONT LES NUMROSSONT DONNS DANS CE MANUEL OU DANS LESSUPPLMENTS PUBLIS PAR SONY.MODEL IDENTIFICATION BACK PANEL PARTS
10、No.MODEL4-217-757-1US , CND4-217-757-2AEP, UK, E, AUSAbbreviationCND : Canadian modelAUS : Australian modelParts No.RadioFans.CN 收音机爱 好者资料库3SECTION 1SERVICE NOTEEPT506FPT558CN554 (Red) 2PCN654 (Red) 4PCN201 (Red) 4PCN751 (Red) 4PCN852 (Red) 4PCN702 (Black) 4PCN701 (White) 4PCN604 (White) 4P SECURING
11、 THE GRILL (A)When securing the grill (A) to the top panel, use the Sony bondSC608LV (7-432-912-48). ( )Top panel (Buttom side) SERVICE POSITIONWhen performing servicing, use a table about 15 cm as shown inthe figure. REPLACING THE POWER TRANSISTORWhen replacing the power transistors (Q304 to Q313:
12、L-ch, Q404to Q413: R-ch), replace all ten together.L ch : Q304 to Q313R ch : Q404 to Q413Grille (A)4 NOTE ON ARRANGING WIRESAs how the wires in this unit are drawn affect the sound quality,note down the positions of wires before beginning servicing.After repairs, arrange the wires as follows.A : Aft
13、er binding wires, push down.B : Bind avoiding touching the heatsink.C : Bind avoiding touching the wires below (binder A).D : Arrange so that the wires from CN802 pass below the wiresfrom CN2.INPUT boardAC/PS boardCN802CN2PS BboardABCDHeatsinkLead pinLead pinLead pinLead pin5SECTION 2GENERALThis sec
14、tion is extracted frominstruction manual.6TA-N177SECTION 4DIAGRAMSSECTION 3ELECTRICAL ADJUSTMENTBIAS CURRENT ADJUSTMENT As the voltage changes according to the time the power is sup-plied, adjust correctly according to the following procedure.Connection:4-1. CIRCUIT BOARDS LOCATIONMAIN L boardMAIN R
15、 boardINPUT boardPS B boardAC/PS boardAC SW boardLED boardProcedure:1. Measure the voltage at the five measuring points just after sup-plying the power, and adjust RV301 (L-CH) and RV401 (R-CH)so that the measuring point with the lowest voltage becomesapprox 15 mV.Measuring PointAdjusting PointL-CHB
16、etween the 5 measuring points(+) TP301, TP302, TP303,RV301TP304, TP305 and TP306 ()R-CH Between the 5 measuring points(+) TP401, TP402, TP403,RV401TP404, TP405 and TP406 ()Digital voltmeterMAIN-L, R boardsTP301 to 305 (L-CH), TP401 to 405 (R-CH)TP306 (L-CH), TP406 (R-CH)2. Leave for one hour with th
17、e power supplied. (Aging)3. Measure the voltage at the respective measuring points and ad-just RV301 (L-CH) and RV401 (R-CH) so that the voltages be-come within the ranges shown in the following table. Adjust tothe voltage with the highest priority shown in the table as muchas possible.Priority Orde
18、rAdjusting Value1st (Highest priority)19.8 mV to 22.0 mV2nd19.8 mV to 24.2 mV3rd18.7 mV to 24.2 mV4th18.7 mV to 25.2 mV5th15.0 mV to 25.2 mV4. Leave for another 30 minutes if the adjustment control has beenrotated.5. Measure the voltage again and check that it is within the adjust-ing value. If outs
19、ide, repeat from step 3 again.6. Be sure to perform aging for more than 30 minutes if the adjust-ment control has been rotated. Finally check the voltage beforeending the adjustment.THIS NOTE IS COMMON FOR PRINTED WIRINGBOARDS AND SCHEMATIC DIAGRAMS.(In addition to this, the necessary note is printe
20、din each block.)For schematic diagrams.Note: All capacitors are in F unless otherwise noted. pF: F50 WV or less are not indicated except for electrolyticsand tantalums. All resistors are in and 1/4 W or less unless otherwisespecified.%: indicates tolerance. 2 : nonflammable resistor. 5 : fusible res
21、istor. C : panel designation. S : B+ Line. T : B Line. H : adjustment for repair. Voltages and waveforms are dc with respect to ground inplayback mode. Voltages are taken with a VOM (Input impedance 10 M).Voltage variations may be noted due to normal produc-tion tolerances. Signal path.F: AUDIONote:
22、The components identi-fied by mark ! or dottedline with mark ! are criti-cal for safety.Replace only with partnumber specified.Note:Les composants identifis parune marque ! sont critiquespour la scurit.Ne les remplacer que par unepice portant le numrospcifi.For printed wiring boards.Note: X : parts
23、extracted from the component side.: Through hole. b : Pattern from the side which enables seeing.(The other layers patterns are not indicated.)Caution:Pattern face side: Parts on the pattern face side seen from the(Side B)pattern face are indicated.Parts face side:Parts on the parts face side seen f
24、rom the(Side A)parts face are indicated.TA-N1884-2. SCHEMATIC DIAGRAM MAIN L SECTION (Page 12)(Page 14)(Page 14)(Page 12)(Page 14)TA-N199 Semiconductor LocationRef. NoLocationQ305D-11Q306D-10Q307D-9Q308D-8Q309D-6Q310D-5Q311D-4Q312D-3Q313D-1Q314B-3Q315A-3Q316A-12Q317A-12Q318A-11Q319A-11Ref. NoLocatio
25、nD301C-9D302B-4D303B-4D304B-5D305B-5D306B-2D307B-3D308A-2IC301A-12Q301C-8Q302B-4Q303B-5Q304D-134-3. PRINTED WIRING BOARD MAIN L SECTION Refer to page 7 for Circuit Boards Location.INPUTBOARDAC / PSBOARDAC / PSBOARDPS BBOARDINPUTBOARD(Page 13)(Page 13)(Page 15)(Page 15)(Page 13)TA-N110104-4. SCHEMATI
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