Aiwa-NSXD20-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL DATA CD STEREO SYSTEM NSX-D20 NSX-R20 S/M Code No. 09-024-454-0R1 REVISION U(S) LH(S) BASIC CD MECHANISM : BZG-2 ZD9GNC1 BASIC TAPE MECHANISM : CMAT6Z2(1+1)ALPS This Service Manual is the Revision Publishing and replaces Simple Manual (S/M Code No. 09-01C-454-0T1). If requiring inform

2、ation about the CD mechanism, see Service Manual of BZG-2, (S/M Code No. 09-023-353-2N8). NSXD20 SPEAKERSYSTEM CD CASSEIVER SXND20CXND20 REMOTE CONTROLLER RCCAS03(VS) NSXR20SXNR20CXNR20 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

3、STARTING REPAIR .5, 6 ELECTRICAL PARTS LIST (CX ND20 / NR20) .7 20 CHIP RESISTOR PART CODE.21 TRANSISTOR ILLUSTRATION.21 WIRING 1 (MAIN / HP).22 SCHEMATIC DIAGRAM 1 (MAIN 1 / 2) .23 SCHEMATIC DIAGRAM 2 (MAIN 2 / 2) .24 SCHEMATIC DIAGRAM 3 (U : HP).25 SCHEMATIC DIAGRAM 4 (LH : HP).26 WIRING 2 (FRONT)

4、 .27 SCHEMATIC DIAGRAM 5 (FRONT / DECK) .28 WIRING 3 (U : PT).29 SCHEMATIC DIAGRAM 6 (U : PT) .30 WIRING 4 (LH : PT).31 SCHEMATIC DIAGRAM 7 (LH : PT) .32 WIRING 5 (DECK).33 IC BLOCK DIAGRAM .34 FL (HUA 13SS09T) GRID ASSIGNMENT / PIN CONNECTION / ANODE CONNECTION.35 IC DESCRIPTION .36, 37 ADJUSTMENT

5、(TUNER / DECK / FRONT) .38 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 GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) .52 SPEAKER PARTS LIST (SX NR20 / ND20).53 ACCESSORI

6、ES / PARTS LIST .54 OTHER PARTS LIST (CX ND20 / NR20) .55 TABLE OF CONTENTS RadioFans.CN 收音机爱 好者资料库 3 SPECIFICATIONS Design and specifications are subject to change without notice. MAIN UNIT CX-ND20 / NR20 TUNER FM tuning range87.5 MHz to 108 MHz FM usable sensitivity (IHF)13.2 dBf FM antenna termin

7、als75 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 output 32 W + 32 W (40 Hz - 20 kHz, T.H.D. less than 1 %, 6 ohms) 40 W + 40 W (1 kHz, T.H.D. less than 10 %, 6 ohms) Power out

8、put Rated: 40 W + 40 W (6 ohms, T.H.D. 1 %, 1 kHz) Reference: 50 W + 50 W (6 ohms, T.H.D. 10 %, 1 kHz) Total harmonic distortion 0.08 % (20 W, 1 kHz, 6 ohm, DIN AUDIO) Total harmonic distortion0.08 % (25 W, 1 kHz, 6 ohm, DIN AUDIO) Input VIDEO / AUX: 500mV Input VIDEO / AUX: 500mV MIC: 1.0 mV (10 ko

9、hms) 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: playback x 1 DECK 2: recording / playback x 1, erase x 1 CD PLAYER LaserSemiconductor laser (l = 780 nm) D/A conver

10、ter1 bit dual Signal - to - noise ratio85 dB (1 kHz, 0 dB) Harmonic distortion0.05 % (1 kHz, 0 dB) GENERAL Power requirements 120 V AC, 60 Hz Power requirements 120 V / 220 - 230 V / 240 V AC (Switchable), 50 Hz / 60 Hz Power consumption 61 W Power consumption 71 W Power consumptionWith ECO mode on:

11、 0.6 W in standby modeWith ECO mode off: 20 W Dimensions (W x H x D)260 x 324 x 315 mm (101/4 x 127/8 x 121/2 in.) Weight 5.8 kg (12 lbs 13 oz) Weight 6.0 kg FRONT SPEKERS SX ND20 / NR20 Speaker system3 way, bass reflex (magnetic shielded) Speakers unitsWoofer: 120 mm (43/4 in.) cone Tweeter: 60 mm

12、(23/8 in.) cone Super tweeter: 20 mm (13/16 in.) ceramic Impedance6 ohms Dimensions (W x H x D)210 x 324 x 215 mm (83/8 x 127/8 x 81/2 in.) Weight3.0 kg (6 lbs 10 oz) 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. WARNI

13、NG! 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 laser radiation when open

14、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 kyttohjeessa mainitulla tavalla saataa altistaa kyt-tjn turvallisuusluokan 1 ylittvlle nkymttmll

15、e 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 CAUTION Use of controls or adjustments or performance o

16、f 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, nr sikkerhedsafbrydereer ude

17、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 to replace Optical block (BZG-6

18、YANC) (PXR-104X-BP-0101) 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 5 NOTE ON BEFORE

19、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 depending on the models. Be sure to check the reference numbers of th

20、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

21、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 befo

22、re 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 good judgement of the MICROCOMPUTER 11111Turn on the

23、 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 correctly and the MICROCOMPUTER is judged to be good. 1. Forced dis

24、charge 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

25、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 resistor at an end of lead wire that has clips at both ends. Connect the ot

26、her 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 negative (-) side (-VH) of C102 in the same way. (For two seconds) 55

27、555Check 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 also if the POWER AMPLIFIER circuit or power supply circuit has any

28、 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 occurs

29、, 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 the AC power cord. 22222Short both ends of the electrolytic capacit

30、or 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 pin number of transistor (Q110) and electrolytic capacitor (C113) ca

31、n 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 procedures. Be sure to exchange

32、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. 7 != ! SAFTY PARTS C= Components marked All components used on this mode

33、l 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 will be stocked at the spare parts centers. Components marked X an

34、d 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, position output at maximum. 2) Tune the receiving frequency of the unit at AM

35、1000kHz. 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 instructed in preparations. Adjustment

36、 point: L952 / L953 1) Set S.S.G. to AM; carrier of 1000kHz with 30% modulation, and source at 1kHz, position output at maximum. 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 (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 600kHz with 30% modulation, and s