Aiwa-NSXR81-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL DATA CD STEREO SYSTEM NSX-R81 S/M Code No. 09-025-455-1N2 EZ(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-R81 SPEAKERSYSTEM CD CASSEIVER

2、 CX-NR81 REMOTE CONTROLLER RC-CAS01 SX-NR80 RadioFans.CN 收音机爱 好者资料库 -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 23 TRANSISTOR ILLUSTRATION . 24 SCHEMATIC DIAGRAM -1/5 (MAIN-1/2,

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

4、-5/5 (POWER SECTION) . 32 WIRING -4/4 (POWER C.B). 33 ELECTRICAL ADJUSTMENT. 34 40 CD TEST MODE . 41 LCD DISPLAY .42 43 IC BLOCK DIAGRAM. 44 IC DESCRIPTION .45 46 MECHANICAL EXPLODED VIEW. 47 MECHANICAL PARTS LIST . 48 COLOR NAME TABLE. 49 TAPE MECHANISM EXPLODED VIEW . 50 TAPE MECHANISM PARTS LIST

5、.51 52 GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) . 53 SPEAKER PARTS LIST (SX-NR80) . 54 OTHER PARTS LIST .55 56 TABLE OF CONTENTS -1/1 RadioFans.CN 收音机爱 好者资料库 -3- SPECIFICATIONS -1/1 MAIN UNIT CX-NR81 TUNER FM tuning range87.5 MHz to 108 MHz FM usable sensitivity (IHF)16.8 dBf FM ante

6、nna terminal75 ohms (unbalanced) MW tuning range531 kHz to 1602 kHz (9 kHz step) 530 kHz to 1710 kHz (10 kHz step) MW usable sensitivity350 V/m LW tuning range144 kHz to 290 kHz LW usable sensitivity1400 V/m MW/LW antennaLoop antenna AMPLIFIER Power outputRated: 80 W + 80 W (6 ohms, T.H.D. 1 %, 1 kH

7、z/DIN 45500) Reference: 100 W + 100 W (6 ohms, T.H.D. 10 %, 1 kHz/DIN 45324) DIN MUSIC POWER: 220 W + 220 W Total harmonic distortion0.08 % (40 W, 1 kHz, 6 ohms, DIN AUDIO) InputVIDEO/AUX: 700 mV OutputsSPEAKERS: 6 ohms or more CD DIGITAL OUT (OPTICAL) PHONES: 32 ohms or more CASSETTE DECK Track for

8、mat4 tracks, 2 channels stereo Frequency response50 Hz - 15 kHz Recording systemAC bias 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,

9、 0 dB) GENERAL Power requirements230 V AC, 50 Hz Power consumption110 W Power consumptionWith 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 uni

10、tsSubwoofer: 160 mm cone Mid range: 80 mm cone Tweeter: 50 mm cone Super tweeter: 20 mm 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. RadioFans.CN 收音机爱 好者资料库 -4- This set employs laser. There

11、fore, be sure to follow carefully the instructions below when servicing. WARNING! WHEN SERVICING, DO NOT APPROACH 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 LE

12、NS ON THE OPTICAL PICK-UP BLOCK. Caution: Invisible laser radiation when open and interlocks defeated avoid exposure to beam. Advarsel: Usynlig laserstling vedbning, nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. VAROITUS! Laiteen Kyttminen muulla kuin tss kyttohjeessa mainit

13、ulla tavalla saataa altistaa kyt-tjn turvallisuusluokan 1 ylittvlle nkymttmlle lasersteilylle. VARNING! Om apparaten 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

14、BEAM DURING SERVICING -1/1 CAUTION Use of controls or adjustments or performance of proce- dures other than those 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

15、 radiations. ADVARSEL Usynlig laserstling ved bning, nr sikkerhedsafbrydereer ude af funktion. Undg udsttelse 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 LU

16、OKAN 1LASER LAITE KLASS 1LASER APPARAT Precaution to replace Optical block (KSM-213RSCM) Body or clothes electrostatic 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 sho

17、wn in right figure. CD PICK-UP Assy PWB Solder Solder -5- NOTE ON BEFORE STARTING REPAIR -1/2 1. Forced discharge 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 acro

18、ss the electrolytic capacitors (C101, 102) even though AC power cord is removed. If repair is attempted in this 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.

19、 2Connect a discharging resistor at an end of lead wire that has clips at both ends. Connect the other end of 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

20、 as step 3 to the negative (-) side (-VH) of C102 in the same way. (For two seconds) 5Check that voltage across 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) o

21、f the electrolytic capacitors can change depending on the models. Be sure to check the reference numbers of the 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

22、 MICROCOMPUTER. Exchange the MICROCOMPUTER after confirming that the MICROCOMPUTER is surely defective. 2-1. Regarding 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

23、main power cannot be turned on. Therefore, be sure to check the terminal voltage of the HOLD terminal before exchange. 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

24、. B. that sets the HOLD terminal to L. Good or no good judgement of the MICROCOMPUTER 1 Turn on the AC main power. 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

25、 judged to be working correctly and the MICRO COMPUTER is judged to be good. Fig-1 MAIN C.B D101 C101C102 34 22 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 c

26、ircuit or power supply circuit has any abnormalities or not. 2-2. Regarding reset There are cases that the machine 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

27、 the above described phenomenon occurs, it can lead to wrong judgement as if the MICROCOMPUTER is defective and 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

28、 ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers. 3 Connect 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 el

29、ectrolytic capacitor (C113) can change depending on the models. Be sure to check the reference numbers on schematic 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 pr

30、ocedures. Be sure to exchange the MICROCOMPUTER after surely confirming that the trouble is not caused by poor 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. != !

31、 SAFTY PARTS C= Components marked All components used on this model at the production line are shown in this service 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

32、will be stocked at the spare parts centers. Components marked X and R are not designated as spare parts for after 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 or 1,000 kHz with 30% modulation, and source at 1 kH

33、z, position output at maximum. 2) Tune the receiving frequency of the unit at MW 999 kHz or 1,000 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 L802 so that the millivoltmeter

34、 points maximum. 6. Tracking Adjustment (MW) Requirements: As instructed in preparations. Adjustment point: L952 / L953 1) Set S.S.G. to MW; carrier of 999 kHz with 30% modulation, and source at 1 kHz, position output at maximum. 2) Tune the receiving frequency of the unit at MW 999 kHz. 3) While mo

35、nitoring the waveform at 1kHz through the oscilloscope, lower the output level of S.S.G. maximum (till a certain degree of noise is monitored). 4) Adjust L952 so that the millivoltmeter points maximum. 5) Set S.S.G. to MW; carrier of 603 kHz with 30% modulation, and source at 1 kHz. 6) Tune the rece

36、iving frequency of the unit at MW 603 kHz. 7) Adjust L953 so that the millivoltmeter points maximum. 8) Repeat above steps 1) to 7) 2 to 3 times. 7. Tracking Adjustment(LW) Requirements: As instructed in preparations. Adjustment point: L941/TC942 1) Set S.S.G. to LW; carrier of 144 kHz with 30% modu

37、lation, and source at 1 kHz, position output at maximum. 2) Tune the receiving frequency of the unit at LW144 kHz. 3) While monitoring the waveform at 1kHz through the oscilloscope, lower the output level of S.S.G. maximum (till a certain degree of noise is monitored). 4) Adjust L941 so that the mil

38、livoltmeter points maximum. 5) Set S.S.G. to LW; carrier of 290 kHz with 30% modulation, and source at 1 kHz. 6) Tune the receiving frequency of the unit at LW 290 kHz. 7) Adjust TC942 so that the millivoltmeter points maximum. 8) Repeat above steps 1) to 7) 2 to 3 times. 8. Auto-Stop Check (MW) Requirements: As instructed in preparations. 1) Set S.S.G. to MW; carrier of 999 kHz or 1,000 k