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Aiwa NSX-SZ50, Руководство по обслуживанию

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4

NOTE  ON  BEFORE  STARTING  REPAIR

Charging voltage (V)

Discharging

 Rated power (W)

Parts number

(C101, 102)

resistor (

Ω

)

25-48

100

3

87-A00-247-090

49-140

220

5

87-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 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 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.  Therefore, 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 “L”.

• Good or no good judgement of the MICROCOMPUTER

1

Turn on the AC main power.

2

Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the “H” level or not.

3

When 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 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 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

1

Remove the AC power cord.

2

Connect a discharging resistor at an end of lead wire that
has clips at both ends.  Connect the other end of the lead
wire to metal chassis.

3

Contact the other end of the discharging resistor to the
positive (+) side (+VH) of C101. (For two seconds)

4

Contact the same end of the discharging resistor as step 3
to the negative (-) side (-VH) of C102 in the same way.
(For two seconds)

5

Check 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.

MAIN C.B

D101

C101

C102

3

4

2

2

All manuals and user guides at all-guides.com

Содержание NSX-SZ50

Страница 1: ...V BASIC CD MECHANISM AZG 1 ZA3RDM NSX SZ50 HS V S M Code No 09 004 424 6R3 R E V I S I O N This Service Manual is the Revision Publishing and replaces Simple Manual NSX SZ50 HS V S M Code No 09 004 4...

Страница 2: ...of 32 ohms or more SPECIFICATIONS Cassette deck section Track format 4 tracks 2 channels stereo Frequency response 50 Hz 15000 Hz Recording system AC bias Heads Deck 1 Playback head x 1 Deck 2 Recordi...

Страница 3: ...gereuse exposition aux radiations ADVARSEL Usynlig laserst ling ved bning n r sikkerhedsafbrydereer ude af funktion Undg uds ttelse for str ling This Compact Disc player is classified as a CLASS 1 LAS...

Страница 4: ...AC main power 2 Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the H level or not 3 When the HOLD terminal is L level the abnormality detection circuit is ju...

Страница 5: ...tor C113 that is connected to VDD of the MICROCOMPUTER with tweezers 3 Connect the AC power cord again If the MICROCOMPUTER returns to the normal operation the MICROCOMPUTER is good Note The reference...

Страница 6: ...87 010 197 080 C CAP S 0 01 25 K B C2012 C0034 87 010 260 080 CAP E 47 25 M 11L SME C0035 87 010 380 080 CAP E 47 16 M 11L SME C0036 87 010 381 080 CAP E 330 16 M SME C0038 87 010 197 080 C CAP S 0 0...

Страница 7: ...33 25 K B GRM C0661 87 010 178 080 C CAP S 1000P 50 K B C2012 HS C0661 87 012 157 080 C CAP S 330P 50 J CH GRM V C0662 87 010 178 080 C CAP S 1000P 50 K B C2012 HS C0662 87 012 157 080 C CAP S 330P 50...

Страница 8: ...010 178 080 C CAP S 1000P 50 K B C2012 C0274 87 010 178 080 C CAP S 1000P 50 K B C2012 C0301 87 010 182 080 C CAP S 2200P 50 K B C2012 C0302 87 010 196 080 C CAP S 0 1 25 Z F C2012 C0303 87 010 196 0...

Страница 9: ...F 8 LH HS PT0001 8A NF8 608 010 PT ANF 8 EZ V PT0002 8A NF8 673 010 PT SUB ANF 8 H KAMI HS PT0002 8A NF8 662 010 PT SUB ANF 8 E V RY0002 87 A91 339 010 RELAY AC DC12V G5PA 2 HS RY0002 87 A91 418 010 R...

Страница 10: ...2K 2SA933S E C B 2SC3331 T U CSC4115BC E C B 2SB1370 B C E DTC114ES KTC3199GR E C B 2SJ460 2SK2541 S D G S G D 2SK2158 2SJ461 T1 E B C 2SA1235F 2SC2714O 2SC3052F CMBT5551 CMBT5401 KRA102S KRA107S KRC1...

Страница 11: ...12 11 FL HNA 11MM30 GRID ASSIGNMENT ANODE CONNECTION GRID ASSIGNMENT ANODE CONNECTION All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 12: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 A B C D E F G H I J 14 13 WIRING 1 MAIN C B IC991 JW234 All manuals and user guides at all guides com...

Страница 13: ...16 15 SCHEMATIC DIAGRAM 1 MAIN FUNCTION AMP SECTION All manuals and user guides at all guides com...

Страница 14: ...18 17 SCHEMATIC DIAGRAM 2 MAIN TUNER SECTION C780 4700p C779 4700p V All manuals and user guides at all guides com...

Страница 15: ...20 19 SCHEMATIC DIAGRAM 3 FRONT DECK HS All manuals and user guides at all guides com...

Страница 16: ...22 21 SCHEMATIC DIAGRAM 4 FRONT DECK V All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 17: ...EDIT CHECK S417 SET S409 TIMER S407 T BASS S406 BBE S415 SYNC DUB S408 ENTER S405 GEQ S410 CLOCK S404 TAPE S403 TUNER S402 VIDEO AUX S401 CD S430 DISC CHANGE S431 OPEN CLOSE S433 CD BLANKSKIP S420 MUL...

Страница 18: ...1 2 3 4 5 6 7 A B C D E 26 25 SCHEMATIC DIAGRAM 5 PT WIRING 3 PT C B WIRING 4 DECK C B HS 1 2 3 4 5 6 7 A B C D E F G H I J All manuals and user guides at all guides com...

Страница 19: ...27 1 2 3 4 5 6 7 A B C D E F G H I J WIRING 5 DECK C B V YEL PH DECK 1 DECK 2 EH RPH BLK WHT GRN YEL WHT RED GRY BRN GRY GRN All manuals and user guides at all guides com...

Страница 20: ...28 IC BLOCK DIAGRAM IC LA1843 IC LC72131D All manuals and user guides at all guides com...

Страница 21: ...29 IC BA3835F IC BU2092F All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 22: ...30 IC M61503FP All manuals and user guides at all guides com...

Страница 23: ...signal input FL GRID output G11 G1 Not connected FL SEGMENT output P35 P32 Power supply input FL SEGMENT output P31 P30 FL SEGMENT output P29 Spectrum analyzer band switching output FL SEGMENT output...

Страница 24: ...input to diode FL SEGMENT output P16 AM10K input to diode FL SEGMENT output P15 DECK2 cassette detect switch data input FL SEGMENT output P14 DECK2 side B record OK switch data input FL SEGMENT outpu...

Страница 25: ...0 Test point TP8 Lch TP9 Rch Adjustment location SFR1 Method Play back the test tape and adjust SFR1 so that the frequency counter reads 3000Hz 5Hz and 45Hz REV with respect to forward speed 9 Head Az...

Страница 26: ...6 37 38 38 39 39 40 41 42 43 44 BINDER WIRE 45 46 47 PT C B 49 50 51 52 48 D A I A A A A A A A A F F G G A A A HT SINK HT SINK HT SINK HT SINK A A A B B C A A A E F H H MAIN C B AZG 1 ZA3RDM FRONT C B...

Страница 27: ...WINDOW TRAY 22 88 NF8 205 010 GUIDE FL 23 8A NF8 020 010 KEY FUN 24 8A NF8 018 110 REFLECTOR FUN 25 8A NF8 016 010 KEY POWER 26 8A NF8 031 110 KEY DISC 27 8A NF8 032 010 CAP DISC 28 8A NF8 017 010 RE...

Страница 28: ...ZM1 344 010 0E LVR ASSY PINCH R2 28 82 ZM1 259 210 0E SPR T PINCH R 29 82 ZM1 240 110 0E LVR REC 30 80 ZM6 243 010 0E SH 1 75 3 6 0 5 SLT 31 82 ZM1 255 310 0E SPR E LVR DIR 32 82 ZM3 305 210 0E GEAR C...

Страница 29: ...1 HEAD 2 C B DECK 2 PH DECK 1 RPH DECK 2 DECK 2 DECK 2 36 DECK 1 B B A B B 31 38 39 40 34 33 35 43 45 41 41 44 49 47 48 46 C C 30 8 DECK 1 D 18 52 51 D D CAPSTAN N 2 2 41 5 DECK C B 50 50 A CUSH G DI...

Страница 30: ...LEVER EJECT R LEVER EJECT L 27 48 53 52 51 57 54 55 56 63 62 49 50 59 HEAD C B D D E F 38 39 40 32 34 33 35 43 45 41 41 44 16 18 47 30 46 8 B CAPSTAN N 2 2 41 7 DECK C B SOL 2 SOL 1 16 D A B C D A 15...

Страница 31: ...2 ZM3 306 110 0E LVR FR M2 35 82 ZM1 265 110 0E SPR E TRIG 36 87 761 073 410 0E VFT2 2 6 6 W O SLOT 37 82 ZM1 255 310 0E SPR E LVR DIR 38 82 ZM1 322 010 0E SPR T FR60 39 82 ZM1 220 210 0E GEAR IDLER 4...

Страница 32: ...Insert a flat bladed screwdriver into the position indicated by the arrows and remove the panel Remove the screws of each speaker unit and then remove the speaker units Type 2 Remove the grill frame...

Страница 33: ...RILLE FRAME ASSY 4 8A DS8 009 010 PROTECTOR 5 88 NS5 610 010 CORD SPKR 6 88 NS5 611 010 CORD SPKR B L 7 8Z NSY 003 010 CORD BUSH 8 88 NS3 029 010 CORD BUSH L 9 8Z NS7 602 010 SPKR W 160 10 8Z NSY 604...

Страница 34: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 920074 All manuals and user guides at all guides com...

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