NSX-SZ70 NSX-SZ73
LH
LH
SERVICE MANUAL
COMPACT DISC STEREO |
BASIC TAPE MECHANISM: 2ZM-3MK2 PR4NM |
CASSETTE RECEIVER |
BASIC CD MECHANISM: AZG-1 ZD3RDM |
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SYSTEM |
CD–CASSEIVER |
SPEAKER |
REMOTE CONTROLLER |
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NSX–SZ70 |
CX–NSZ70 |
SX–WNS70 |
RC–ZAS01 |
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NSX-SZ73 |
CX-NSZ73 |
SX-WNH81 |
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•This Service Manual is the “Revision Publishing” and replaces “Simple Manual” NSX-SZ70/SZ73 (S/M Code No. 09-001-425-3T1).
•If requiring information about the CD mechanisim, see Service Manual of AZG-1 (S/M Code No. 09-001-335-3N8).
S/M Code No. 09-004-425-3R1
REVISIONDATA
SPECIFICATIONS
<FM Tuner section> |
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Tuning range |
87.5 MHz to 108 MHz |
Usable sensitivity(IHF) |
13.2 dBf |
Antenna terminals |
75 ohms (unbalanced) |
<AM Tuner section> |
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Tuning range |
530 kHz to 1710 kHz (10 kHz step) |
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531 kHz to 1602 kHz (9 kHz step) |
Usable sensitivity |
350 uV/m |
Antenna |
Loop antenna |
<Amplifier section> |
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Mid-high frequency amplifier |
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Power output |
Rated: 32 W + 32 W |
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(8 ohms, T.H.D. 1 %,1 kHz) |
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Reference: 40 W + 40 W |
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(8 ohms, T.H.D. 10 %,1 kHz) |
Total harmonic distortion |
0.1 % (15 W, 1 kHz, 8 ohms, |
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DIN AUDIO) |
Low frequency amplifier |
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Power output |
Rated: 96 W + 96 W |
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(6 ohms, T.H.D. 1 %, 135 Hz) |
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Reference: 120 W + 120 W |
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(6 ohms, T.H.D. 10 %,135 Hz) |
Total harmonic distortion |
0.1 % (50 W,135 Hz,6 ohms, |
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DIN AUDIO) |
Inputs |
VIDEO/AUX : 300 mV (adjustable) |
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MD: 316 mV (adjustable) |
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MIC: 1.8 mV (10 kohms) |
Outputs |
SPEAKERS HIGH FREQ : |
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accept speakers of 8 ohms or more |
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SPEAKERS LOW FREQ : |
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accept speakers of 6 ohms or more |
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SURROUND SPEAKERS : |
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accept speakers of 8 to 16 ohms |
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LINE OUT: 210 mV |
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PHONES (stereo jack) : accepts |
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headphones of 32 ohms or more |
<Cassette deck section> |
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Track format |
4 tracks, 2 channels stereo |
Frequency response |
CrO2 tape: 50 Hz – 16000 Hz |
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Normal tape: 50 Hz – 15000 Hz |
Recording system |
AC bias |
Heads |
Deck 1: Playback head x 1 |
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Deck 2: Recording/Playback head |
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x 1, erase head x 1 |
<Compact disc player section> |
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Laser |
Semiconductor laser (λ =780 nm) |
D-A converter |
1 bit dual |
Signal-to-noise ratio |
85 dB (1 kHz, 0 dB) |
Harmonic distortion |
0.05 % (1 kHz, 0 dB) |
Wow and flutter |
Unmeasurable |
<Speaker system SX–WNSZ70>(NSX-SZ70)
Speaker system |
3 way, Built-in subwoofer(magnetic |
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shielded type |
Speaker units |
Subwoofer : |
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160 mm cone type |
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Full range: |
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100 mm cone type |
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Super Tweeter : |
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20 mm ceramic type |
Impedance |
6 ohms / 8 ohms |
Sensitivity |
87 dB/W/m |
Dimensions (W x H x D) |
240 x 324 x 281 mm |
Weight |
5.0 kg |
<Speaker system SX–WNH81>(NSX-SZ73) |
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Speaker system |
3 way, Built-in subwoofer(magnetic |
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shielded type |
Speaker units |
Subwoofer : |
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200 mm cone type |
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Full range: |
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120 mm cone type |
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Super Tweeter : |
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20 mm ceramic type |
Impedance |
6 ohms / 8 ohms |
Sensitivity |
87 dB/W/m |
Dimensions (W x H x D) |
240 x 324 x 285 mm |
Weight |
5.7 kg |
<General> |
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Power requirements |
120 V/220-230 V/240 V |
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switchable, 50/60Hz |
Power consumption |
200W |
Power consumption in |
If the power-economizing mode is |
standby mode |
ECO OFF: 21 W |
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If the power-economizing mode is |
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ECO ON or ECO AUTO: 0.9 W |
Dimensions (W x H x D) |
260 x 330 x 395mm |
Weight |
9.5 kg |
•Design and specifications are subject to change without notice.
•The word "BBE"and the "BBE symbol" are trademarks of BBE Sound, Inc.
Under license from BBE Sound,Inc.
ACCESSORIES / PACKAGE LIST
REF. NO. PART NO. |
KANRI |
DESCRIPTION |
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NO. |
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18A-NF7-902-010
28A-NF7-912-010
387-006-225-010
487-043-115-010
!5 87-A91-017-010
IB,LH(ESP)M<NSX-SZ70> IB,LH(ESP)M 73<NSX-SZ73> AM LOOP ANT NC2 ANT,FEEDER FM PLUG,CONVERSION JT-0476
6 8Z-NF8-702-010 |
RC UNIT,RC-ZAS01 |
- 2 -
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing.
WARNING!!
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.
s Caution: Invisible laser radiation when open and interlocks defeated avoid exposure to beam.
sAdvarsel: Usynlig laserståling ved åbning, når sikkerhedsafbrydere er ude af funktion.
Undgå udsættelse for stråling.
VAROITUS!
Laiteen Käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saataa altistaa käyt-täjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
VARNING!
Om apparaten används på annat sätt än vad som specificeras i denna bruksanvising, kan användaren utsättas för osynling laserstrålning, som överskrider gränsen för laserklass 1.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herin may result in hazardous radiation exposure.
ATTENTION
L’utillisation de commandes, réglages ou procédures autres que ceux spécifiés peut entraîner une dangereuse exposition aux radiations.
ADVARSEL
Usynlig laserståling ved åbning, når sikkerhedsafbrydereer ude af funktion. Undgå udsættelse for stråling.
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 1 LASER PRODUCT
KLASSE 1 LASER PRODUKT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
Precaution to replace Optical block
(KSS-213F)
PICK-UP Assy P.C.B
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.
Solder
- 3 -
NOTE ON BEFORE STARTING REPAIR
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 |
MAIN C.B |
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1 |
Remove the AC power cord. |
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2 |
Connect a discharging resistor at an end of lead wire that |
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D101 |
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has clips at both ends. Connect the other end of the lead |
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wire to metal chassis. |
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3 |
Contact the other end of the discharging resistor to the |
3 |
C101 |
C102 |
4 |
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positive (+) side (+VH) of C101. (For two seconds) |
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4 |
Contact the same end of the discharging resistor as step |
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3to the negative (-) side (-VH) of C102 in the same way. |
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(For two seconds) |
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5 |
Check that voltage across C101 and C102 has decreased |
2 |
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2 |
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to 1 V or less using a multimeter or an oscilloscope. |
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Select a discharging resistor referring to the following table. |
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Fig-1 |
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Charging voltage (V) |
Discharging |
Rated power (W) |
Parts number |
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(C101, 102) |
resistor (Ω) |
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25-48 |
100 |
3 |
87-A00-247-090 |
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49-140 |
220 |
5 |
87-A00-232-090 |
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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.
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