Aiwa-NSXTR77-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL DATA CD STEREO SYSTEM NSX-TR77 S/M Code No. 09-029-361-6N1 U(S) BASIC TAPE MECHANISM : ZZM-3 YPR3NC BASIC CD MECHANISM : BZG-2 ZD5GNC2 NSX-TR77 SPEAKERSYSTEM CD CASSEIVER CX-SNTR77 REMOTE CONTROLLER RC-CAS02 SX-SNTR77 RadioFans.CN 收音机爱 好者资料库 -2- SPECIFICATIONS . 4 PROTECTION OF EYES F

2、ROM LASER BEAM DURING SERVICING . 5 NOTE ON BEFORE STARTING REPAIR . 6, 7 ACCESSORIES PARTS LIST. 8 ELECTRICAL PARTS LIST .9 24 TRANSISTOR ILLUSTRATION . 25 SCHEMATIC DIAGRAM -1/5 (MAIN C.B-1/2, AMP SECTION). 26 SCHEMATIC DIAGRAM -2/5 (MAIN C.B-2/2, TUNER SECTION) . 27 SCHEMATIC DIAGRAM -3/5 (HP C.B

3、). 28 WIRING -1/4 (MAIN C.B/HP C.B) . 29 SCHEMATIC DIAGRAM -4/5 (FRONT C.B/DECK C.B) . 30 WIRING -2/4 (FRONT C.B). 31 WIRING -3/4 (DECK C.B) . 32 SCHEMATIC DIAGRAM -5/5 (POWER C.B) . 33 WIRING -4/4 (POWER C.B). 34 ELECTRICAL ADJUSTMENT.35 41 CD TEST MODE . 42 FL DISPLAY. 43, 44 IC BLOCK DIAGRAM. 45

4、IC DESCRIPTION . 46, 47 MECHANICAL EXPLODED VIEW. 48 MECHANICAL MAIN PARTS LIST . 49, 50 COLOR NAME TABLE. 51 TAPE MECHANISM EXPLODED VIEW . 52 TAPE MECHANISM PARTS LIST . 53, 54 GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) . 55 SPEAKER PARTS LIST (SX-SNTR77) . 56 OTHER PARTS LIST . 57,

5、58 TABLE OF CONTENTS -1/2 RadioFans.CN 收音机爱 好者资料库 -3- CD MECHANISM SECTION CD MECHANISM SECTION . 59 How to Adjust the Rotating Phase of the Gear, Main Cam . 59 ELECTRICAL PARTS LIST .60 63 TRANSISTOR ILLUSTRATION . 63 BLOCK DIAGRAM-1/1 . 64 WIRING-1/2 (3CD) . 65 SCHEMATIC DIAGRAM -1/1 . 66 WIRING -

6、2/2 (T-T). 67 WAVE FORM . 68 IC BLOCK DIAGRAM. 69 IC DESCRIPTION .70 72 CD MECHANISM EXPLODED VIEW . 73 CD MECHANISM PARTS LIST. 74 COLOR NAME TABLE. 75 TABLE OF CONTENTS -2/2 RadioFans.CN 收音机爱 好者资料库 -4- SPECIFICATIONS -1/1 MAIN UNIT CX-NTR77 (U) TUNER FM tuning range87.5 MHz to 108 MHz FM usable se

7、nsitivity (IHF)13.2 dBf FM antenna terminal75 ohms (unbalanced) AM tuning range530 kHz to 1710 kHz (10 kHz step) 531 kHz to 1602 kHz (9 kHz step) AM usable sensitivity350 V/m AM antennaLoop antenna AMPLIFIER Power output120 W + 120 W (40 Hz - 20 kHz, THD less than 1 %, 6 ohms) 150 W + 150 W (1 kHz,

8、THD less than 10 %, 6 ohms) Total harmonic distortion0.08 % (75 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 bias HeadsDECK 1: playba

9、ck 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 requirements120 V AC, 60 Hz Power consumption130 W Power consumptionWith ECO mode on:

10、 0.6 W in standby modeWith ECO mode off: 25 W Dimensions (W x H x D)260 x 324 x 391 mm (10 1/4 x 12 7/8 x 15 1/2 in.) Weight8.7 kg (19 lbs 3 oz) FRONT SPEAKERS SX-NTR77 Speaker system3 way, bass reflex Speaker unitsWoofer: 120 mm (4 3/4 in.) cone x 3 Tweeter: 60 mm (2 3/8 in.) cone Super tweeter: 20

11、 mm (13/16 in.) ceramic Impedance6 ohms Dimensions (W x H x D)275 x 370 x 297 mm (10 7/8 x 14 5/8 x 11 3/4 in.) Weight5.1 kg (11 lbs 4 oz) Specifications and external appearance are subject to change without notice. -5- This set employs laser. Therefore, be sure to follow carefully the instructions

12、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 LENS ON THE OPTICAL PICK-UP BLOCK. Caution: Invisible

13、 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 mainitulla tavalla saataa altistaa kyt-tjn turvallisuuslu

14、okan 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 BEAM DURING SERVICING -1/1 CAUTION Use of controls

15、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 radiations. ADVARSEL Usynlig laserstling ved bning

16、, 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 LUOKAN 1LASER LAITE KLASS 1LASER APPARAT Precaution t

17、o 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 shown in right figure. CD PICK-UP Assy PWB Solder Sold

18、er -6- 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 across the electrolytic capacitors (C101, 102) even tho

19、ugh 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. 2Connect a discharging resistor at an end of lead

20、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 as step 3 to the negative (-) side (-VH) of C102 i

21、n 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) of the electrolytic capacitors can change depending

22、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 MICROCOMPUTER. Exchange the MICROCOMPUTER after co

23、nfirming 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 main power cannot be turned on. Therefore, be sure

24、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. B. that sets the HOLD terminal to L. Good or no g

25、ood 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 judged to be working correctly and the MICRO COMPU

26、TER 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 CN701 CN601 Q060 -7- In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has

27、 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 the above described phenomenon oc

28、curs, 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 ends of the electrolytic capacito

29、r C913 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 (Q060) and electrolytic capacitor (C913) can ch

30、ange 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 procedures. Be sure to exchange the

31、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 C913 17 14 C913 17 14 Short with tweezers. != ! 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.