Aiwa-NSX-R80-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL DATA CD STEREO SYSTEM NSX-R80 S/M Code No. 09-025-455-1N3 V(S) BASIC TAPE MECHANISM : 6ZM-3 PR4NM BASIC CD MECHANISM : BZG-5 ZD5GNDM If requiring information about the CD mechanism, see Service Manual of BZG-5 ZD5GNDM, (S/M Code No. 09-023-353-3NC). NSX-R80 SPEAKERSYSTEM CD CASSEIVER

2、CX-NR80 REMOTE CONTROLLER RC-CAS01SX-NR80 -2- SPECIFICATIONS .3 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING . 4 NOTE ON BEFORE STARTING REPAIR . 5, 6 ACCESSORIES PARTS LIST. 7 ELECTRICAL PARTS LIST .8 22 TRANSISTOR ILLUSTRATION . 23 SCHEMATIC DIAGRAM -1/5 (MAIN-1/2, AMP SECTION). 24 SCHEMATI

3、C DIAGRAM -2/5 (MAIN-2/2, TUNER SECTION) . 25 SCHEMATIC DIAGRAM -3/5 (HP SECTION). 26 WIRING -1/4 (MAIN C.B, HP C.B) . 27 SCHEMATIC DIAGRAM -4/5 (FRONT/DECK/CD-LED SECTION). 28 WIRING -2/4 (FRONT C.B/CD-LED C.B) . 29 WIRING -3/4 (DECK C.B/HEAD-1 C.B) . 30 SCHEMATIC DIAGRAM -5/5 (POWER SECTION) . 31

4、WIRING -4/4 (POWER C.B). 32 ELECTRICAL ADJUSTMENT. 33 39 CD TEST MODE . 40 LCD DISPLAY .41 42 IC BLOCK DIAGRAM. 43 IC DESCRIPTION .44 45 MECHANICAL EXPLODED VIEW. 46 MECHANICAL PARTS LIST . 47 COLOR NAME TABLE. 48 TAPE MECHANISM EXPLODED VIEW . 49 TAPE MECHANISM PARTS LIST .50 51 GENERAL SPEAKER DIS

5、ASSEMBLY INSTRUCTIONS (FOR REFERENCE) . 52 SPEAKER PARTS LIST (SX-NR80) . 53 OTHER PARTS LIST .54 55 TABLE OF CONTENTS -1/1 -3- SPECIFICATIONS -1/1 MAIN UNIT CX-NR80 TUNER FM tuning rangeFM1 (OIRT): 65 MHz to 74 MHz (10 kHz step) FM2 (CCIR): 87.5 MHz to 108 MHz (50 kHz step) FM usable sensitivity (I

6、HF)FM1: 15.3 dBf FM2: 12.8 dBf FM antenna terminal75 ohms (unbalanced) AM tuning range531 kHz to 1602 kHz (9 kHz step) 530 kHz to 1710 kHz (10 kHz step) AM usable sensitivity350 V/m AM antennaLoop antenna AMPLIFIER Power outputRated: 80 W + 80 W (6 ohms, T.H.D. 1%, 1 kHz/DIN 45500) Reference: 100 W

7、+ 100 W (6 ohms, T.H.D. 10 %, 1 kHz/DIN 45324) Total harmonic distortion0.08 % (40 W, 1 kHz, 6 ohms, DIN AUDIO) InputVIDEO/AUX: 700 mV OutputsSPEAKERS: 6 ohms or more PHONES: 32 ohms or more CASSETTE DECK Track format4 tracks, 2 channels stereo Frequency response50 Hz - 15 kHz Recording systemAC bia

8、s HeadsDECK 1: playback x 1 DECK 2: recording/playback x 1, erase x 1 CD PLAYER LaserSemiconductor laser (= 780 nm) D/A converter1 bit dual Signal-to-noise ratio85 dB (1 kHz, 0 dB) Harmonic distortion0.05 % (1 kHz, 0 dB) GENERAL Power requirements230 V AC, 50 Hz Power consumption110 W Power consumpt

9、ionWith ECO mode on: 0.6 W in standby modeWith ECO mode off: 20 W Dimensions (W x H x D)260 x 324 x 360 mm Weight7.8 kg FRONT SPEAKERS SX-NR80 Speaker system4 way, Built-in subwoofer (magnetic shielded) Speaker unitsSubwoofer: 160 mm cone Mid range: 80 mm cone Tweeter: 50 mm cone Super tweeter: 20 m

10、m ceramic Impedance6 ohms Dimensions (W x H x D)266 x 324 x 259 mm Weight5.7 kg Specifications and external appearance are subject to change without notice. -4- This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing. WARNING! WHEN SERVICING, DO NOT APPRO

11、ACH THE LASER EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMISSION. BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 30cm FROM THE SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK. Caution: Invisible laser radiation when open and interlocks defeated avoid ex

12、posure to beam. Advarsel: Usynlig laserstling vedbning, nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. VAROITUS! Laiteen Kyttminen muulla kuin tss kyttohjeessa mainitulla tavalla saataa altistaa kyt-tjn turvallisuusluokan 1 ylittvlle nkymttmlle lasersteilylle. VARNING! Om app

13、araten anvnds p annat stt n vad som specificeras i denna bruksanvising, kan anvndaren utsttas fr osynling laserstrlning, som verskrider grnsen fr laserklass 1. PROTECTION OF EYES FROM LASER BEAM DURING SERVICING -1/1 CAUTION Use of controls or adjustments or performance of proce- dures other than th

14、ose specified herin may result in hazardous radiation exposure. ATTENTION Lutillisation de commandes, rglages ou procdures autres que ceux spcifis peut entraner une dangereuse exposition aux radiations. ADVARSEL Usynlig laserstling ved bning, nr sikkerhedsafbrydereer ude af funktion. Undg udsttelse

15、for strling. This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the rear exterior. CLASS 1LASER PRODUCT KLASSE 1LASER PRODUKT LUOKAN 1LASER LAITE KLASS 1LASER APPARAT Precaution to replace Optical block (KSM-213RSCM) Body or clothes elect

16、rostatic potential could ruin laser diode in the optical block. Be sure ground body and workbench, and use care the clothes do not touch the diode. 1) After the connection, remove solder shown in right figure. CD PICK-UP Assy PWB Solder Solder -5- NOTE ON BEFORE STARTING REPAIR -1/2 1. Forced discha

17、rge of electrolytic capacitor of power supply block When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across the electrolytic capacitors (C101, 102) even though AC power cord is removed. If repair is attempted in thi

18、s condition, secondary defect can occur. In order to prevent the secondary trouble, perform the following measures before starting repair work. Discharge procedure 1Remove the AC power cord. 2Connect a discharging resistor at an end of lead wire that has clips at both ends. Connect the other end of

19、the lead wire to metal chassis. 3Contact the other end of the discharging resistor to the positive (+) side (+VH) of C101. (For two seconds) 4Contact the same end of the discharging resistor as step 3 to the negative (-) side (-VH) of C102 in the same way. (For two seconds) 5Check that voltage acros

20、s C101 and C102 has decreased to 1 V or less using a multimeter or an oscilloscope. Select a discharging resistor referring to the following table. Note: The reference numbers (C101, C102) of the electrolytic capacitors can change depending on the models. Be sure to check the reference numbers of th

21、e charging capacitors on schematic diagram before starting the discharging work. 2. Check items before exchanging the MICROCOMPUTER Be sure to check the following items before exchanging the MICROCOMPUTER. Exchange the MICROCOMPUTER after confirming that the MICROCOMPUTER is surely defective. 2-1. R

22、egarding the HOLD terminal of the MICROCOMPUTER When the HOLD terminal (INPUT) of the MICROCOMPUTER is H, the MICROCOMPUTER is judged to be operating correctly. When this terminal is L, the main power cannot be turned on. Therefore, be sure to check the terminal voltage of the HOLD terminal before e

23、xchange. When the MICROCOMPUTER is not defective, the HOLD terminal can also go L when the POWER AMPLIFIER has any abnormalities that triggers the abnormality detection circuit on the MAIN C. B. that sets the HOLD terminal to L. Good or no good judgement of the MICROCOMPUTER 1 Turn on the AC main po

24、wer. 2 Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the H level or not. 3 When the HOLD terminal is L level, the abnormality detection circuit is judged to be working correctly and the MICRO COMPUTER is judged to be good. Fig-1 MAIN C.B D101 C101C102 34 2

25、2 Charging voltage (V)Discharging Rated power (W)Parts number (C101, 102)resistor ( ) 25-48100387-A00-247-090 49-140220587-A00-232-090 -6- In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has any abnormalities or not. 2-2. Regarding reset There are cases that the mac

26、hine does not work correctly because the MICROCOMPUTER is not reset even though the AC power cord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed. When the above described phenomenon occurs, it can lead to wrong judgement as if the MICROCOMPUTER is defective an

27、d to exchange the MICROCOMPUTER. In such a case, perform the forced-reset by the following procedure and check good or no good of the MICROCOM PUTER. 1 Remove the AC power cord. 2 Short both ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers. 3 Connec

28、t the AC power cord again. If the MICROCOMPUTER returns to the normal operation, the MICROCOMPUTER is good. Note: The reference number or MICROCOMPUTER pin number of transistor (Q110) and electrolytic capacitor (C113) can change depending on the models. Be sure to check the reference numbers on sche

29、matic diagram before starting the discharging work. 2-3. Confirmation of soldering state of MICROCOMPUTER Check the soldering state of the MICROCOMPUTER in addition to the above described procedures. Be sure to exchange the MICROCOMPUTER after surely confirming that the trouble is not caused by poor

30、 soldering but the MICROCOMPUTER itself. NOTE ON BEFORE STARTING REPAIR -2/2 Fig-2-2 MICRO- COMPUTER MICROCOMPUTER FRONT C.B FRONT C.B VSS VDD C113 16 15 C113 18 15 Short with tweezers. != ! SAFTY PARTS C= Components marked All components used on this model at the production line are shown in this s

31、ervice manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers. Components marked X and R are not designated as spare parts for af

32、ter sales service, and will not be stocked at the spare parts centers. UNIT-NAME ! C REF-NO PARTS-NO PARTS-NAME SUFFIX carrier of 999 kHz with 30% modulation, and source at 1 kHz. 2) Tune the receiving frequency of the unit at AM 999 kHz. 3) While monitoring the waveform at 1 kHz through the oscillo

33、scope, lower the output level of S.S.G. maximum (till a certain degree of noise is monitored). 4) Adjust L802 so that the millivoltmeter points maximum. 5. Tracking Adjustment (AM) Requirements: As instructed in preparations. Adjustment point: L952/L953 1) Set S.S.G. to AM; carrier of 999 kHz with 3

34、0% modulation, and source at 1 kHz, position output at maiximum. 2) Tune the receiving frequency of the unit at AM 999 kHz. 3) While monitoring the waveform at 1 kHz through the oscilloscope, lower the output level of S.S.G. maximum (till a certain degree of noise is monitored). 4) Adjust L952 so th

35、at the millivoltmeter points maximum. 5) Set S.S.G. to AM; carrier of 603 kHz with 30% modulation, and source at 1 kHz. 6) Tune the receiving frequency of the unit at AM 603 kHz. 7) Adjust L953 so that the millivoltmeter points maximum. 8) Repeat above steps 1) to 7) 2 to 3 times. 6. Auto-Stop Check

36、 (AM) Requirements: As instructed in preparations. 1) Set S.S.G. to AM; carrier of 999 kHz or 1,000 kHz with 30% modulation, source at 1 kHz, and output of 40 to 65 dBuv. 2) Apply the tuning search function, and check that the unit automatically stops at AM 999 kHz or 1,000 kHz. ELECTRICAL ADJUSTMEN

37、T -3/7 -36- Make the following preparations for FM adjustment. Preparations Standard Signal Generator (S.S.G.) / Loop antenna / Oscilloscope / Millivoltmeter / Dummy resistance (6y) 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Connect the output of S.S.G. to the an

38、tenna input of the unit. 7. Tracking Adjustment (FM) Requirements: As instructed in preparations. Adjustment point: L901/L904 1) Set S.S.G. to FM; carrier of 65 MHz with 75 kHz modulation, and source at 1 kHz. 2) Tune the receiving frequency of the unit at FM 65 MHz. 3) While monitoring the waveform at 1 kHz through the oscilloscope, lower the output level of S.S.G. maximum (till a c