Aiwa-NSXT929-cs-sm维修电路原理图.pdf
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1、SERVICE MANUALDATANSX-T929RC-ZAS04SYSTEMCDCASSEIVERREMOTE CONTROLLERCX-NT929COMPACT DISC STEREOSYSTEMBASIC TAPE MECHANISM : 2ZM-3MK2 PR7NMBASIC CD MECHANISM : 6ZG-1 ZZRNDMNSX-T929LHS/M Code No. 09-013-440-2R1 This Service Manual is the “Revision Publishing” and replaces “Simple Manual” of NSX-T929 (
2、LH), (S/M Code No. 09-00C-440-2T1). If requiring information about the CD mechanism, see Service Manual of 6ZG-1,(S/M Code No. 09-001-338-7N8).SPEAKERSX-WNT929REVISIONRadioFans.CN 收音机爱 好者资料库 2 SPECIFICATIONSTuning range87.5 MHz to 108 MHzUsable sensitivity (IHF)13.2 dBfAntenna terminals75 ohms (unba
3、lanced)Tuning range531 kHz to 1602 kHz (9 kHz step)530 kHz to 1710 kHz (10 kHz step)Usable sensitivity350 V/mAntennaLoop antennaPower outputRated: 250 W + 250 W(8 ohms, T.H.D. 1 %, 60Hz )Reference: 320 W + 320 W(8 ohms, T.H.D. 10 %, 60Hz )Total harmonic distortion0.3 % (125 W, 60Hz, 8 ohms,DIN AUDIO
4、)InputsVIDEO/AUX: 300 mV (adjustable)MD: 300 mV (adjustable)MIC 1, MIC 2: 1.0 mV (10 kohms)OutputsLINE OUT: 210 mVSPEAKERS: accept speakers of8 ohms or moreSURROUND SPEAKERS:accept speakers of 8 ohms to 16 ohmsPHONES (stereo jack): acceptsheadphones of 32 ohms or moreTrack format4 tracks, 2 channels
5、 stereoFrequency responseCrO2 tape: 50 Hz 16000 HzNormal tape: 50 Hz 15000 HzSignal-to-noise ratio60 dB (Dolby B NR ON, CrO2 tapepeak level)Recording systemAC biasHeadsDeck 1: Playback head x 1Deck 2: Recording/playback head x 1,erase head x 1LaserSemiconductor laser ( =780 nm)D-A converter1 bit dua
6、lSignal-to-noise ratio85 dB (1 kHz, 0 dB)Harmonic distortion0.05 % (1 kHz, 0 dB)Power requirements120 V/ 220V230V/ 240 V AC(switchable) 50/60 HzPower consumption390 WPower consumption inWith ECO mode on: 0.9 Wstandby modeWith ECO mode off: 47 WDimensions (W x H x D)300 x 383.5 x 404.5 mmWeight of ma
7、in unit17.2 kgSpeaker system3 way,built-in subwoofer(magnetic shielded type)Speaker unitsWoofer: 160 mm X 2 coneMid range: 140 mm coneSuper tweeter: 20 mm ceramicImpedance8 ohms / 8 ohmsDimensions (W x H x D)270 x 495 x 297 mmWeight6.5 kg Manufactured under license from Dolby Laboratories Licensing
8、Corporation. “DOLBY” and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. The word “BBE” and the “BBE symbol” are trademarks of BBE Sound, Inc. Under license from BBE Sound, Inc. Design and specifications are subject to change without notice.RadioFans.CN 收音机爱 好者资料库 3 C
9、LASS 1LASER PRODUCTKLASSE 1LASER PRODUKTLUOKAN 1LASER LAITEKLASS 1LASER APPARATThis set employs laser. Therefore, be sure to follow carefullythe instructions below when servicing.WARNING!WHEN SERVICING, DO NOT APPROACH THE LASEREXIT WITH THE EYE TOO CLOSELY. IN CASE IT ISNECESSARY TO CONFIRM LASER B
10、EAM EMISSION.BE SURE TO OBSERVE FROM A DISTANCE OF MORETHAN 30cm FROM THE SURFACE OF THE OBJEC-TIVE LENS ON THE OPTICAL PICK-UP BLOCK.sCaution: Invisible laser radiation whenopen and interlocks defeated avoidexposure to beam.sAdvarsel: Usynlig laserstling ved bning,nr sikkerhedsafbrydere er ude af f
11、unktion.Undg udsttelse for strling.VAROITUS!Laiteen Kyttminen muulla kuin tss kyttohjeessamainitulla tavalla saataa altistaa kyt-tjnturvallisuusluokan 1 ylittvlle nkymttmllelasersteilylle.VARNING!Om apparaten anvnds p annat stt n vad somspecificeras i denna bruksanvising, kan anvndarenutsttas fr osy
12、nling laserstrlning, som verskridergrnsen fr laserklass 1.PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGCAUTIONUse of controls or adjustments or performance of proce-dures other than those specified herin may result inhazardous radiation exposure.ATTENTIONLutillisation de commandes, rglages ou
13、procduresautres que ceux spcifis peut entraner une dangereuseexposition aux radiations.ADVARSELUsynlig laserstling ved bning, nr sikkerhedsafbrydereerude af funktion. Undg udsttelse for strling.This Compact Disc player is classified as a CLASS 1LASER product.The CLASS 1 LASER PRODUCT label is locate
14、d on therear exterior.Precaution to replace Optical block(KSS-213F)Body or clothes electrostatic potential couldruin laser diode in the optical block. Be sureground body and workbench, and use care theclothes do not touch the diode.1) After the connection, remove solder shown inright figure.PICK-UP
15、Assy PWBSolderRadioFans.CN 收音机爱 好者资料库 4 NOTE ON BEFORE STARTING REPAIRCharging voltage (V)Discharging Rated power (W)Parts number(C101, 102)resistor ()25-48100387-A00-247-09049-140220587-A00-232-090Note: The reference numbers (C101, C102) of the electrolytic capacitors can change depending on the mo
16、dels. Be sure to check thereference numbers of the charging capacitors on schematic diagram before starting the discharging work.2. Check items before exchanging the MICROCOMPUTERBe sure to check the following items before exchanging the MICROCOMPUTER. Exchange the MICROCOMPUTER after confirmingthat
17、 the MICROCOMPUTER is surely defective.2-1. Regarding the HOLD terminal of the MICROCOMPUTERWhen 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
18、 terminal voltage of the HOLDterminal before exchange.When the MICROCOMPUTER is not defective, the HOLD terminal can also go “L” when the POWER AMPLIFIER has anyabnormalities that triggers the abnormality detection circuit on the MAIN C. B. that sets the HOLD terminal to “L”.Good or no good judgemen
19、t of the MICROCOMPUTER11111Turn 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 correctly and theMICROCOMPUTER
20、is judged to be good.1. Forced discharge of electrolytic capacitor of power supply blockWhen repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged acrossthe electrolytic capacitors (C101, 102) even though AC power cord is rem
21、oved. If repair is attempted in this condition, secondary defectcan occur.In order to prevent the secondary trouble, perform the following measures before starting repair work.Discharge procedure11111Remove the AC power cord.22222Connect a discharging resistor at an end of lead wire thathas clips at
22、 both ends. Connect the other end of the leadwire to metal chassis.33333Contact the other end of the discharging resistor to thepositive (+) side (+VH) of C101. (For two seconds)44444Contact the same end of the discharging resistor as step33333 to the negative (-) side (-VH) of C102 in the same way.
23、(For two seconds)55555Check that voltage across C101 and C102 has decreasedto 1 V or less using a multimeter or an oscilloscope.Select a discharging resistor referring to the following table.Fig-1MAIN C.BD101C101C1022234RadioFans.CN 收音机爱 好者资料库 5 In such a case, check also if the POWER AMPLIFIER circ
24、uit or power supply circuit has any abnormalities or not.2-2. Regarding resetThere are cases that the machine does not work correctly because the MICROCOMPUTER is not reset even though the AC powercord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.When the ab
25、ove described phenomenon occurs, it can lead to wrong judgement as if the MICROCOMPUTER is defective and toexchange the MICROCOMPUTER. In such a case, perform the forced-reset by the following procedure and check good or nogood of the MICROCOMPUTER.11111Remove the AC power cord.22222Short both ends
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