Aiwa-NSXSZ4-cs-sm维修电路原理图.pdf
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1、SERVICE MANUALDATABASIC CD MECHANISM : AZG-1 ZA3RNMCOMPACT DISCSTEREO CASSETTE RECEIVERNSX-SZ4NSX-SZ5NSX-SZ7S/M Code No. 09-006-429-1N1KK EZ VEZBASIC TAPE MECHANISM : ZZM-2 PR1NMNSXSZ4RCZAS02SYSTEMCDCASSEIVERREMOTE CONTROLLERCXNSZ4SPEAKERSXNSZ4NSXSZ5CX-NSZ5SXNSZ5NSXSZ7CX-NSZ7SXNSZ7 If requiring info
2、rmation about the CD mechanism, see Service Manual of AZG-1,(S/M Code No. 09-001-335-3NC).RCZAS17RadioFans.CN 收音机爱 好者资料库2SPECIFICATIONSK MODEL (NSX-SZ4/SZ5)EZ MODEL (NSX-SZ5)Design and specifications are subject to change withoutnotice.Design and specifications are subject to change withoutnotice.Ra
3、dioFans.CN 收音机爱 好者资料库3EZ MODEL (NSX-SZ7)Design and specifications are subject to change withoutnotice.V MODEL (NSX-SZ5)Design and specifications are subject to change withoutnotice.RadioFans.CN 收音机爱 好者资料库4PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGVAROITUS!Laiteen Kyttminen muulla kuin tss k
4、yttohjeessa mainit-ulla tavalla saattaa altistaa kyt-tjn turvallisuusluokan 1 ylit-tvlle nkymttmlle lasersteilylle.VARNING!Om apparaten anvnds p annat stt n vad som specificeras idenna bruksanvising, kan anvndaren utsttas fr osynlinglaserstrlning, som verskrider grnsen fr laserklass 1.Caution: Invis
5、ible laser radiation whenopen and interlocks defeated avoid expo-sure to beam.Advarsel:Usynling laserstling ved bning,nr sikkerhedsafbrydere er ude af funktion.Undg udsttelse for strling.CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in
6、 hazardousradiation exposure.ATTENTIONLutilisation de commandes, rglages ou procdures autres queceux spcifis peut entraner une dangereuse exposition auxradiations.ADVARSEL!Usynlig laserstling ved bning, nr sikkerhedsafbrydereer udeaf funktion. Undg udsttelse for strling.This Compact Disc player is c
7、lassified as a CLASS 1 LASERproduct.The CLASS 1 LASER PRODUCT label is located on the rearexterior.This set employs laser. Therefore, be sure to follow carefully theinstructions below when servicing.WARNING!WHEN SERVICING, DO NOT APPROACH THE LASER EXITWITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSA
8、RY TOCONFIRM LASER BEAM EMISSION. BE SURE TO OBSERVEFROM A DISTANCE OF MORE THAN 30cm FROM THESURFACE OF THE OBJECTIVE LENS ON THE OPTICALPICK-UP BLOCK.CLASS 1KLASSE 1LUOKAN 1KLASS 1LASER PRODUCTLASER PRODUKTLASER LAITELASER APPARATPrecaution to replace Optical block1) After the connection, remove s
9、older shown inthe figure below.Body or clothes electrostatic potential could ruinlaser diode in the optical block. Be sure groundbody and workbench, and use care the clothesdo not touch the diode.SolderZA8 MODELZA3/ZA4 MODEL (KSS-213F)RadioFans.CN 收音机爱 好者资料库5NOTE ON BEFORE STARTING REPAIRCharging vo
10、ltage (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 models. Be sure to check thereference numbers of the charging capacitors on schemat
11、ic 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 the MICROCOMPUTER is surely defective.2-1. Regarding the HOLD terminal of the MI
12、CROCOMPUTERWhen 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 HOLDterminal before exchange.When the MICROCOMPUTER is n
13、ot 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 judgement of the MICROCOMPUTER1Turn on the AC main power.2Confirm that the main power is
14、turned on and the HOLD terminal of the MICROCOMPUTER keeps the “H” level or not.3When the HOLD terminal is “L” level, the abnormality detection circuit is judged to be working correctly and theMICROCOMPUTER is judged to be good.1. Forced discharge of electrolytic capacitor of power supply blockWhen
15、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 removed. If repair is attempted in this condition, secondary defectcan occur.In order to prevent
16、 the secondary trouble, perform the following measures before starting repair work.Discharge procedure1Remove the AC power cord.2Connect a discharging resistor at an end of lead wire thathas clips at both ends. Connect the other end of the leadwire to metal chassis.3Contact the other end of the disc
17、harging resistor to thepositive (+) side (+VH) of C101. (For two seconds)4Contact the same end of the discharging resistor as step 3to the negative (-) side (-VH) of C102 in the same way.(For two seconds)5Check that voltage across C101 and C102 has decreasedto 1 V or less using a multimeter or an os
18、cilloscope.Select a discharging resistor referring to the following table.Fig-1MAIN C.BD101C101C1022234Fig-2-1MICROCOMPUTERFRONT C.BMAIN C.BOVER LOAD DETDC DETQ110POWER AMPPOWER AMPPOWER SUPPLYHOLDHOLD SW(AC DETPIN101 CON6011?2?*?1?2?*?In some models, it is PIN (.PIN number is different depending up
19、on microprocessor.RadioFans.CN 收音机爱 好者资料库6In such a case, check also if the POWER AMPLIFIER circuit 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
20、 re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.When the above 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 a
21、nd check good or nogood of the MICROCOMPUTER.1Remove the AC power cord.2Short both ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers.3Connect the AC power cord again. If the MICROCOMPUTER returns to the normal operation, the MICROCOMPUTER isgood.Note
22、: The reference number or MICROCOMPUTER pin number of transistor (Q110) and electrolytic capacitor (C113) can change dependingon the models. Be sure to check the reference numbers on schematic diagram before starting the discharging work.2-3. Confirmation of soldering state of MICROCOMPUTERCheck the
23、 soldering state of the MICROCOMPUTER in addition to the above described procedures. Be sure to exchange theMICROCOMPUTER after surely confirming that the trouble is not caused by poor soldering but the MICROCOMPUTER itself.MICRO-COMPUTERMICROCOMPUTERFRONT C.BFRONT C.BVSSVDDC113*%C1131815Short with
24、tweezers.Fig-2-2RadioFans.CN 收音机爱 好者资料库7REF. NOPART NO.KANRIDESCRIPTIONNO.REF. NOPART NO.KANRIDESCRIPTIONNO.ELECTRICAL MAIN PARTS LISTIC 8A-NFA-615-010 C-IC,M38B57MCH-E236FP 8A-NFA-615-010 C-IC,M38B57MCH-E236FP 87-A21-482-010 IC,RPM6938-H4 87-A21-419-040 C-IC,NJM14558MD-TE2 87-A21-443-040 C-IC,M6249
25、5AFP 87-A21-560-010 IC,LA1844L-A 87-A20-440-040 C-IC,BU1920FS 87-070-127-110 IC,LC72131 DTRANSISTOR 87-026-609-080 TR,KTA1266GR 89-213-702-010 TR,2SB1370 (1.8W) 87-026-610-080 TR,KTC3198GR 87-A30-076-080 C-TR,2SC3052F 87-A30-075-080 C-TR,2SA1235F 87-A30-090-080 FET,2SK2541 87-A30-484-080 C-TR,KRA102
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