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1、SERVICE MANUAL DATA CD STEREO SYSTEM NSX-R72 S/M Code No. 09-028-452-3N5 V(S) BASIC TAPE MECHANISM : 6ZM-3 PR4NM1 BASIC CD MECHANISM : BZG-5 ZD5GNDM1 NSX-R72 SPEAKERSYSTEM CD CASSEIVER SX-NR70CX-NR70 REMOTE CONTROLLER RC-CAS01 RadioFans.CN 收音机爱 好者资料库 -2- SPECIFICATIONS .3 PROTECTION OF EYES FROM LAS
2、ER BEAM DURING SERVICING . 4 HOW TO ADJUST THE ROTATING PHASE OF THE GEAR, MAIN CAM. 5 NOTE ON BEFORE STARTING REPAIR .6 7 ACCESSORIES PARTS LIST. 8 ELECTRICAL PARTS LIST .9 25 TRANSISTOR ILLUSTRATION . 26 BLOCK DIAGRAM -1/1 (CD SECTION) . 27 SCHEMATIC DIAGRAM -1/6 (MAIN-1/2, AMP SECTION). 28 SCHEMA
3、TIC DIAGRAM -2/6 (MAIN-2/2, TUNER SECTION) . 29 SCHEMATIC DIAGRAM -3/6 (HP SECTION). 30 WIRING -1/5 (MAIN C.B, HP C.B) . 31 SCHEMATIC DIAGRAM -4/6 (FRONT/CD-LED/DECK SECTION). 32 WIRING -2/5 (FRONT C.B/CD LED C.B). 33 WIRING -3/5 (DECK C.B/HEAD-1 C.B) . 34 SCHEMATIC DIAGRAM -5/6 (PT SECTION) . 35 WI
4、RING -4/5 (PT C.B). 36 SCHEMATIC DIAGRAM -6/6 (3CD/T-T SECTION). 37 WIRING -5/5 (3CD/T-T C.B) . 38 WAVEFORMS. 39 ELECTRICAL ADJUSTMENT. 40 46 CD TEST MODE . 47 FL DISPLAY (HUA-11MM42T) . 48 49 IC BLOCK DIAGRAM. 50 IC DESCRIPTION .51 55 MECHANICAL EXPLODED VIEW. 56 MECHANICAL PARTS LIST . 57 COLOR NA
5、ME TABLE. 58 TAPE MECHANISM EXPLODED VIEW . 59 TAPE MECHANISM PARTS LIST . 60 61 CD MECHANISM EXPLODED VIEW . 62 CD MECHANISM PARTS LIST . 63 GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) . 64 SPEAKER PARTS LIST (SX-NR70) . 65 OTHER PARTS LIST .66 68 TABLE OF CONTENTS -1/1 RadioFans.CN 收音
6、机爱 好者资料库 -3- SPECIFICATIONS -1/1 MAIN UNIT CX-NR72 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 (IHF)FM1: 15.3 dBf FM2: 12.8 dBf FM antenna terminal75 ohms (unbalanced) AM tuning range531 kHz to 1602 kHz (9 kHz ste
7、p) 530 kHz to 1710 kHz (10 kHz step) AM usable sensitivity350 V/m AM antennaLoop antenna AMPLIFIER Power outputRated: 64 W + 64 W (6 ohms, T.H.D. 1%, 1 kHz/DIN 45500) Reference: 80 W + 80 W (6 ohms, T.H.D. 10 %, 1 kHz/DIN 45324) Total harmonic distortion0.08 % (32 W, 1 kHz, 6 ohms, DINAUDIO) InputVI
8、DEO/AUX: 500 mV OutputsSPEAKERS: 6 ohms or more CD DIGITAL OUT (OPTICAL) PHONES: 32 ohms or more CASSETTE DECK Track format4 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 LaserSemicondu
9、ctor 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 consumption105 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 3
10、24 x 360 mm Weight7.1 kg FRONT SPEAKERS SX-NR70 Speaker system3 way, bass reflex (magnetic shielded) Speaker unitsWoofer: 160 mm cone Tweeter: 60 mm cone Super tweeter: 20 mm ceramic x 2 Impedance6 ohms Dimensions (W x H x D)250 x 324 x 260 mm Weight4.2 kg Specifications and external appearance are
11、subject to change without notice. RadioFans.CN 收音机爱 好者资料库 -4- This set employs laser. Therefore, 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
12、. 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 exposure to beam. Advarsel: Usynlig laserstling vedbning, nr sikkerhedsafbrydere er ude af funktion.
13、Undg udsttelse for strling. VAROITUS! Laiteen Kyttminen muulla kuin tss kyttohjeessa mainitulla 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 os
14、ynling 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 those specified herin may result in hazardous radiation exposure. ATTENTION Lutillisation de commande
15、s, 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 for strling. This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER P
16、RODUCT 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 electrostatic potential could ruin laser diode in the optical block. Be sure ground body and workbench,
17、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 -5- 1) Push down the hooking catch of the CHAS. MECH, and remove the TRAY. 2) Align the arrow mark of the Gear, Main Cam with the black round mark of the CHAS, ME
18、CHA as shown below. 3) Confirm that the Slide, Mech Cam is located in the right position, then insert the TRAY gently. Caution: If the rotating phase of the Gear, Main Cam is incorrectly adjusted, the chucking operation and tray movement will have malfunction. Align the arrow mark with the black rou
19、nd mark. HOW TO ADJUST THE ROTATING PHASE OF THE GEAR, MAIN CAM -1/1 -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 ke
20、pt charged across 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
21、 AC power cord. 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 disch
22、arging resistor 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
23、 (C101, C102) of 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
24、 exchanging the 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 term
25、inal is L, the 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 circui
26、t 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 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 detec
27、tion circuit is 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 -7- In such a case, check also if the PO
28、WER AMPLIFIER circuit 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
29、performed. When 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 cor
30、d. 2 Short both 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 transisto
31、r (Q110) and electrolytic 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 abo
32、ve described procedures. 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
33、 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. Components marked S and O are designated as spare parts f
34、or service and 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 with 30% modulation, and source at 1
35、kHz, position output at maximum. 2) Tune the receiving frequency of the unit at AM 999 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 L952 so that 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 ab
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