SERVICE MANUAL
NSX-HMA56
NSX-DP55
U
LH,K,EZ
CASSETTE DISC
STEREO CASSETTE RECORDER
BASIC TAPE MECHANISM : ZZM-3, 2ZM-3MK2, 6ZM-3
BASIC CD MECHANISM : AZG-1
S/M Code No. 09-007-429-3R1
SYSTEM
CD CASSEIVER
SPEAKER
DECK MECHANISM
REMOTE
CONTROLLER
CD MECHANISM
NSX-HMA56
CX-DP55
LH: 2ZM-3MK2 PR4NM
EZ,K:2ZM-3MK2 PR4NM
6ZM-3 PR2NM
LH,EZ,K: AZG-1 ZA3RDM
LH: SX-NSZ52
SX-CR677
EZ,K: SX-NDP54
SX-CR677
RC-ZAS15
NSX-DP55
CX-HMA56
U: ZZM-3 PR1NM
USFD: AZG-1 YKZD8RDF
AZG-1 YKZA3RDF
USC: AZG-1 ZA8RDC
USM,LH,EZ,K: AZG-1 ZA3RDM
U: SX-WNAJ50
SX-C605
SX-R275
Main unit
FM tuner section
Tuning range
87.5 MHz to 108 MHz
Usable sensitivity (IHF)
U,LH:13.2 dBf
K,EZ:16.8 dBf
Antenna terminals
75 ohms (unbalanced)
AM Tuner section
Tuning range
530 kHz to 1710 kHz (10 kHz step)
531 kHz to 1602 kHz (9 kHz step)
Usable sensitivity
350
µV/m
Antenna
Loop antenna
LW Tuner section (K,EZ)
Tuning range
144 kHz to 290 kHz
sable sensitivity
1400
µV/m
Antenna
Loop antenna
Amplifier section
Mid-high frequency amplifier <U only>
Power output
25W + 25W (200Hz-20kHz, THD less
than 1%, 8 ohms)
Total harmonic
0.1% (15 W,1kHz,8 ohms, DIN AUDIO)
distortion
Low frequency amplifier <U only>
Power output
75W + 75W (50Hz-200Hz, THD less
than 1%, 6 ohms)
Power output
FRONT:
LH:
Rated: 65W + 65W
(6 ohms, T.H.D.1%, 1 kHz)
Reference: 80W + 80W
(6 ohms, T.H.D.10%, 1 kHz)
K,EZ:
Rated: 80W + 80W
(6 ohms, T.H.D.1%, 1 kHz/DIN 45500)
Reference: 100W + 100W
(6 ohms, T.H.D.10%, 1 kHz/DIN 45324)
EZ only:
DIN MUSIC POWER: 165W + 165W
Rear (Surround)
U:
25W + 25W (1kHz, THD less than 1%,
8 ohms)
K,EZ:
Rated: 20W + 20W
(8 ohms, T.H.D. 1%, 1kHz/DIN 45500)
Reference: 25W + 25W (8 ohms, T.H.D.
10%, 1kHz/DIN 45324)
EZ only:
DIN MUSIC POWER: 50W + 50W
LH:
Rated: 20W + 20W (8 ohms, T.H.D. 1%,
1kHz )
Reference: 25W + 25W (8 ohms, T.H.D.
10%, 1kHz)
Center
U:
25W (1kHz, THD less than 1%, 8 ohms)
LH:
20W (8 ohms, T.H.D.1%, 1kHz)
Reference: 25W (8 ohms, T.H.D.10%,
1kHz)
K,EZ:
Rated: 20W (8 ohms, T.H.D.1%,
1kHz/DIN 45500)
Reference: 25W (8 ohms, T.H.D.10%,
1kHz/DIN 45324)
EZ only:
DIN MUSIC POWER: 70W
SPECIFICATIONS
Total harmonic distortion
U:
0.1% (40 W,130Hz, 6 ohms,DIN AUDIO)
K,EZ:
0.1% (40 W,1kHz, 6 ohms,DIN AUDIO/
Front)
LH:
0.06% (35 W,1kHz,6 ohms,DIN AUDIO)
Inputs
VIDEO/AUX : 300mV (adjustable)
MIC : 1.0mV (10 k ohms)
Outputs
SPEAKERS HIGH FREQ: U only
accept speakers of 8 ohms or more
SPEAKERS LOW FREQ: U only
accept speakers of 6 ohms or more
SPEAKERS: LH,K,EZ only
accept speakers of 6 ohms or more
SURROUND SPEAKERS:
accept speakers of 8 ohms to 16 ohms
CENTER SPEAKER:
accept speakers of 8 ohms or more
PHONES (stereo jack):
accept headphones of 32 ohms or more
SUB WOOFER: K,EZ only 1.9V
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:Recording/playback head
x 1, erase head x 1
Compact disc player section
Laser
Semiconductor laser ( l = 780 mm)
D/A converter
1 bit dual
Signal-to-noise ratio
85 dB (1 kHz, 0 dB)
Harmonic distortion
0.05 % (1 kHz, 0 dB)
General
Power requirements
U:120 V AC, 60 Hz
LH:120 V/220 - 230 V/240V AC,
switchable, 50/60 Hz
K,EZ:230 V AC, 50 Hz
Power consumption
U:175 W
LH:190 W
K,EZ:200 W
Power consumption in
ECO OFF : 20 W
standby mode
ECO ON or ECO AUTO : 0.9 W
Dimensions
260 x 326 x 395 mm
(W x H x D)
(101/
4 x 12
7
/
8 x 15
5
/
8 in.)
Weight
U:10.0kg (22 lb 1 oz.)
LH,K,EZ:10.5kg
Speaker system SX-WNAJ50 <U>
Speaker system
3way, Built-in subwoofer
(magnetic shielded type)
Speaker unit
Subwoofer:
160 mm ( 6 3/
8 in.) cone type
Full range:
100 mm ( 4 in.) cone type
Super tweeter:
20 mm ( 13/
8 in.) ceramic type
Impedance
6 ohms/8 ohms
Sensitivity
87 dB/W/m
Dimensions
240 x 324 x 271 mm
(W x H x D)
(91/
2 x 12
7
/
8 x 10
3
/
4 in.)
Weight
4.8kg (10 lb 9 oz.)
2
Speaker system SX-NSZ52 <LH>
Speaker system
3way, bass reflex
(magnetic shielded type)
Speaker unit
Woofer: 140 mm cone type
Tweeter: 60 mm cone type
Super tweeter: 20 mm ceramic type
Impedance
6 ohms
Sensitivity
87 dB/W/m
Dimensions(W x H x D)
232 x 324 x 270 mm
Weight
4.0kg
Speaker system SX-NDP54 <K,EZ>
Speaker system
2way, bass reflex
(magnetic shielded type)
Speaker unit
Woofer: 160 mm cone type
Tweeter: 60 mm cone type
Impedance
6 ohms
Sensitivity
87 dB/W/m
Dimensions(W x H x D)
240 x 324 x 245 mm
Weight
4.4kg
Design and specifications are subject to change without notice.
Manufactured under license from Dolby Laboratories Licensing
Corporation.
DOLBY, the double-D symbol
and "PRO LOGIC" 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.
3
ACCESSORIES / PACKAGE LIST
DESCRIPTION
REF. NO.
KANRI
NO.
PART NO.
1 8A-NFV-903-110
IB,U(EFS)M<USM,USFD>
1 8A-NFV-913-110
IB,U(EFS)B<USC>
1 8A-NFV-902-010
IB,LH(ESP)M<LH>
1 8A-NFV-905-010
IB,K(E)M<KSM>
1 8A-NFV-915-010
IB,K(E)E<KSE>
1 8A-NFV-906-010
IB,EZ(9L)E<EZSE>
1 8A-NFV-916-010
IB,EZ(9L)M<EZSM>
2 87-043-115-010
FEEDER-ANT,FM<U,LH>
3 87-006-225-010
ANT,LOOP AM NC2
3 87-006-268-010
ANT,LOOP AM<USFD>
3 87-A90-030-010
ANT,LOOP AM-NC C<USC>
4 87-A90-118-010
ANT,WIRE FM(Z)<K,EZ>
5 87-A91-017-010
PLUG,CONVERSION JT-0476<LH>
6 8Z-NFV-704-010
RC UNIT,RC-ZAS15
!
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 the right figure.
Precaution to replace Optical block
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.
Caution: Invisible laser radiation when
open and interlocks defeated avoid
exposure to beam.
Advarsel: 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.
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herin may result in
hazardous radiation exposure.
ATTENTION
Lutillisation 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
Solder
PICKUP Assy P.C.B.
<KSS-213F>
<KSM-880CAB>
4
5
NOTE ON BEFORE STARTING REPAIR
Charging voltage (V)
Discharging
Rated power (W)
Parts number
(C101, 102)
resistor (
)
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
1
1
1
1 Turn on the AC main power.
2
2
2
2
2 Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the "H" level or not.
3
3
3
3
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
1
1
1
1 Remove the AC power cord.
2
2
2
2
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
3
3
3
3 Contact the other end of the discharging resistor to the
positive (+) side (+VH) of C101. (For two seconds)
4
4
4
4
4 Contact the same end of the discharging resistor as step
3
3
3
3
3 to the negative (-) side (-VH) of C102 in the same way.
(For two seconds)
5
5
5
5
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.
Fig-1
MAIN C.B
D101
C101
C102
22
3
4