Aiwa-NSX-R70-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL DATA NSX-R70LH(S) S/M Code No. 09-024-452-3R2 BASIC TAPE MECHANISM : 2ZM-3MK2 PR7NM BASIC CD MECHANISM : BZG-5 ZD5GNM This Service Manual is the “Revision Publishing” and replaces “Simple Manual”, NSX-R70 LH(S), S/M Code No. 09-022-452-3T2. If requiring information about the CD mechan

2、ism, see Service Manual of BZG-5, (S/M Code No. 09-023-353-3NC) REVISION CXNR70NSX-R70RCCAS01 SYSTEM CD CASSEIVER REMOTE CONTROLLER SPEAKER SXNR70 CD STEREO SYSTEM 2 SPECIFICATIONS .3 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING.4 NOTE OF BEFORE STARTING REPAIR. 5 , 6 ELECTRICAL PARTS LIST (C

3、X SNR70) .7 21 ELECTRICAL PARTS LIST (2ZM 3MK2 PR7NM).22 CHIP RESISTOR PART CODE.23 TRANSISTOR ILLUSTRATION.23 WIRING 1 (MAIN / JACK).24 SCHEMATIC DIAGRAM 1 (MAIN 1 / 4 ).25 SCHEMATIC DIAGRAM 2 (MAIN 2 / 4 : TUNER SECTION).26 SCHEMATIC DIAGRAM 3 (MAIN 3 / 4 : VF SECTION) .27 SCHEMATIC DIAGRAM 4 (MAI

4、N 4 / 4 : FAN SECTION).28 SCHEMATIC DIAGRAM 5 (JACK) . .29 WIRING 2 (FRONT/ CD LED) .30 SCHEMATIC DIAGRAM 6 (FRONT / DECK / CD LED) .31 WIRING 3 (PT).32 SCHEMATIC DIAGRAM 7 (PT).33 WIRING 4 (DECK / HEAD 1 / HEAD 2) .34 IC BLOCK DIAGRAM . 35 FL (HUA 11MM42T) GRID ASSIGNMENT AND ANODE CONNECTION.36 IC

5、 DESCRIPTION .37 , 38 ADJUSTMENT (TUNER / DECK). 39 44 CD TEST MODE .45 MECHANICAL EXPLODED VIEW . 46 MECHANICAL PARTS LIST . 47 , 48 COLOR NAME TABLE . 49 TAPE MECHANISM EXPLODED VIEW. 50 TAPE MECHANISM PARTS LIST.51 , 52 GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERNCE). 53 SPEAKER PARTS LIS

6、T (SX SNR70).54 ACCESSORIES PARTS LIST .55 OTHERS PARTS LIST (CX SNR70) .56 OTHERS PARTS LIST (2ZM 3MK2 PR7NM) .57 TABLE OF CONTENTS 3 SPECIFICATIONS Tuning range87.5 MHz to 108 MHz Usable sensitivity (IHF)13.2 dBf Antenna terminals75 ohms (unbalanced) Tuning range531 kHz to 1602 kHz (9 kHz step) 53

7、0 kHz to 1710 kHz (10 kHz step) Usable sensitivity350 V/m AntennaLoop antenna Power outputRated : 120 W + 120 W (T.H.D. 1%, 1 kHz, 6 ohms) Reference : 150 W + 150 W (T.H.D. 10%, 1 kHz, 6 ohms) Total harmonic distortion0.08 % (60 W, 1 kHz, 6 ohms, DIN AUDIO) InputsVIDEO/AUX: 700 mV MIC: 2.4 mV (10 ko

8、hms) OutputsSPEAKERS: 6 ohms or more PHONES: 32 ohms or more Track format4 tracks, 2 channels stereo Frequency response50 Hz 15000 Hz Recording systemAC bias HeadsDECK 1 : playback X 1 DECK 2 : recording/playback x 1, erase x 1 LaserSemiconductor laser ( =780 nm) D/A converter1 bit dual Signal-to-no

9、ise ratio85 dB (1 kHz, 0 dB) Harmonic distortion0.05 % (1 kHz, 0 dB) Power requirements120 V/220 V 230 V /240 V AC (switchable), 50 Hz /60 Hz Power consumption145 W Power consumption in standby mode With ECO mode on : 0.6 W With ECO mode off : 25 W Dimensions (W x H x D)260 x 324 x 360 mm Weight8.5

10、kg 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 268 mm Weight4.5 kg Design and specifications are subject to change without notice. 4 This set employs lase

11、r. 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. BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 30cm FROM THE SURFACE OF THE OBJE

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

13、sa 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 osynling laserstrlning, som verskrider grnsen fr laserklass 1. PROTECTION OF EYES FR

14、OM LASER BEAM DURING SERVICING 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

15、 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 PRODUCT label is located on the rear exterior. CLASS 1LASER PRODUCT KLASSE 1LASER PRODUK

16、T 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, and use care the clothes do not touch the diode. 1) After the connection, remove solder

17、 shown in right figure. CD PICK-UP Assy PWB Solder 5 NOTE ON BEFORE STARTING REPAIR Charging voltage (V)Discharging Rated power (W)Parts number (C101, 102)resistor () 25-48100387-A00-247-090 49-140220587-A00-232-090 Note: The reference numbers (C101, C102) of the electrolytic capacitors can change d

18、epending 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

19、 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 main power cannot be turned on. Theref

20、ore, 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. B. that sets the HOLD terminal to

21、“L”. Good or no good judgement of the MICROCOMPUTER 11111Turn on the AC main power. 22222Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the “H” level or not. 33333When the HOLD terminal is “L” level, the abnormality detection circuit is judged to be working

22、 correctly and the MICROCOMPUTER is judged to be good. 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, 1

23、02) 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 11111Remove the AC power cord. 22222Connect a discharging resisto

24、r at an end of lead wire that has clips at both ends. Connect the other end of the lead wire to metal chassis. 33333Contact the other end of the discharging resistor to the positive (+) side (+VH) of C101. (For two seconds) 44444Contact the same end of the discharging resistor as step 33333 to the n

25、egative (-) side (-VH) of C102 in the same way. (For two seconds) 55555Check 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.Fig-1 MAIN C.B D101 C101C102 22 34 6 In such a case, check

26、 also if the POWER 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 +

27、 POWER key) is 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 MICROCOMPUTER. 11111Remove

28、 the AC power cord. 22222Short both ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers. 33333Connect the AC power cord again. If the MICROCOMPUTER returns to the normal operation, the MICROCOMPUTER is good. Note: The reference number or MICROCOMPUTER

29、pin number of transistor (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

30、 in addition to the above described procedures. Be sure to exchange the MICROCOMPUTER after surely confirming that the trouble is not caused by poor soldering but the MICROCOMPUTER itself. Fig-2-2 MICRO- COMPUTER MICROCOMPUTER FRONT C.B FRONT C.B VSS VDD C113 * % 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 1000KHz with 30% modulation, and source at 1KHz. 2) Tune the

33、 receiving frequency of the unit at AM1000KHz. 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 L802 so that the millivoltmeter points maximum. 5. Tracking Adjustment Requirements: As

34、instructed in preparations. Adjustment point: L952 1) Set S.S.G. to AM; carrier of 1000KHz with 30% modulation, and source at 1KHz. 2) Tune the receiving frequency of the unit at AM1000KHz. 3) While monitoring the waveform at 1KHz through the oscilloscope, lower the output level of S.S.G. maximum (t

35、ill a certain degree of noise is monitored). 4) Adjust L952 so that the millivoltmeter points maximum. 6. Auto-Stop Check Requirements: As instructed in preparations. 1) Set S.S.G. to AM; carrier of 1000KHz with 30% modulation, source at 1KHz, and output of 40 to 65dBuv. 2) Apply the tuning search f

36、unction, and check that the unit automatically stops at AM1000KHz. 42 Make the following preparations for FM adjustment. Preparations Standard Signal Generator (S.S.G.) / Loop antenna / Oscilloscope / Millivoltmeter / Dummy resistance (6) 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Connect the output of S.S.G. to the antenna input of the unit. 7. Tracking Adjustment Requirements: As instructed in preparations. Adjustment p