Aiwa-NSXSZ5-cs-sm 电路图 维修手册.pdf
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1、SERVICE MANUAL DATA BASIC CD MECHANISM : AZG-1 ZA3RNMCOMPACT DISC STEREO CASSETTE RECEIVER NSX-SZ4 NSX-SZ5 NSX-SZ7 S/M Code No. 09-006-429-1N1 K K EZ V EZ BASIC TAPE MECHANISM : ZZM-2 PR1NM NSXSZ4 RCZAS02 SYSTEM CD CASSEIVER REMOTE CONTROLLER CXNSZ4 SPEAKER SXNSZ4 NSXSZ5CX-NSZ5SXNSZ5 NSXSZ7CX-NSZ7SX
2、NSZ7 If requiring information about the CD mechanism, see Service Manual of AZG-1, (S/M Code No. 09-001-335-3NC). RCZAS17 RadioFans.CN 收音机爱 好者资料库 2 SPECIFICATIONS K MODEL (NSX-SZ4/SZ5) EZ MODEL (NSX-SZ5) Design and specifications are subject to change without notice. Design and specifications are su
3、bject to change without notice. RadioFans.CN 收音机爱 好者资料库 3 EZ MODEL (NSX-SZ7) Design and specifications are subject to change without notice. V MODEL (NSX-SZ5) Design and specifications are subject to change without notice. RadioFans.CN 收音机爱 好者资料库 4 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
4、 VAROITUS! Laiteen Kyttminen muulla kuin tss kyttohjeessa mainit- ulla tavalla saattaa altistaa kyt-tjn turvallisuusluokan 1 ylit- tvlle nkymttmlle lasersteilylle. VARNING! Om apparaten anvnds p annat stt n vad som specificeras i denna bruksanvising, kan anvndaren utsttas fr osynling laserstrlning,
5、som verskrider grnsen fr laserklass 1. Caution: Invisible laser radiation when open and interlocks defeated avoid expo- sure to beam. Advarsel:Usynling laserstling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. CAUTION Use of controls or adjustments or performance
6、of procedures other than those specified herein may result in hazardous radiation exposure. ATTENTION Lutilisation de commandes, rglages ou procdures autres que ceux spcifis peut entraner une dangereuse exposition aux radiations. ADVARSEL! Usynlig laserstling ved bning, nr sikkerhedsafbrydereer ude
7、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. This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing. WARNING! WHEN SERVICING,
8、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. CLASS 1 KLASSE 1 LUOKAN 1 KLASS 1 LASER PRODUCT LASER PRODUKT LAS
9、ER LAITE LASER APPARAT Precaution to replace Optical block 1) After the connection, remove solder shown in the figure below. 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. Solder
10、 ZA8 MODEL ZA3/ZA4 MODEL (KSS-213F) 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 depending on the
11、 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 after confirmi
12、ng 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. Therefore, be sure to
13、 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 “L”. Good or no
14、 good judgement of the MICROCOMPUTER 1Turn on the AC main power. 2Confirm that the main power is 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 the MICROCOM
15、PUTER 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, 102) even though AC power co
16、rd 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 AC power cord. 2Connect a discharging resistor at an end of lead wire that has c
17、lips 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 discharging resistor as step 3 to the negative (-) side (-VH) of C102 in the same way.
18、 (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.Fig-1 MAIN C.B D101 C101C102 22 34 Fig-2-1 MICROCOMPUTER FRONT C.BMAIN C.B OVER LOAD DET DC DET Q110 POWER AM
19、P POWER AMP POWER SUPPLY HOLD HOLD SW ( AC DET PIN101 CON601 1? 2? ? *? ? 1? 2? ? *? ? In some models, it is PIN (. PIN number is different depending upon microprocessor. 6 In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has any abnormalities or not. 2-2. Regarding
20、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, it can lead to wrong judgement as if
21、 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. 1Remove the AC power cord. 2Short both ends of the electrolytic capacitor C113 that is connected to VDD of the MICROC
22、OMPUTER with tweezers. 3Connect 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) can change depending on the models. Be sure to check
23、 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 the MICROCOMPUTER after surely confirming that the
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