Sony hcd 451 service manual

Page 1

HOD-451

SERVICE MANUAL

US Model
AEP Model
UK Model
Mex/can Model

Dolby noise reduction manutactured under license form Model Name Usin Similar Mechanism 00,3023
Dolby Laboratories licensing Corporation. CD 9
"DOLBY" and the double~D symbol [Dare trade. marks 8 t' CD Mechanism Type CDM-lBEQ
of Dolby Laboratories Licensing corporation. ec Ion Base Unit Name BU-5BDl 3
Tape deck Model Name Using Similar Mechanism HOD-241
Section Ta 9 T ans ort Mechansm T e TCM-210W1
SPECIFICATIONS p ' ° ' y

Amplifier

Overall output

Harmonic distortion

Frequency response

120 W + 12.0 W (front, at rear/ center
oft at1 kHz, 8 ohms)

15 W + 15 W (rear, at center off at 1
kHz, 8 ohms)

30 W (center, at rear off at 1 kHz, 6
ohms)

30 W (super woodfer, at rear/ center
off at 40 Hz, 4 ohms)

Less than 0.9% (at 1 kHz, 8 ohms
loads, front: 120 W + 120 W, rear/
center/ super woofer off)

PHONO: RIAA curve

VIDEO 1/ MD, VIDEO 2:

40 Hz - 50 kHz, :3 dB

Input
Sensitivity Impedance
PHONO 245 mV 50 kilohms
VIDEO 1/MD 250 mV 50 kilohms
VIDEO 2

Output
VIDEO 1 / MD:

Voltage 250 mV, impedance 1 kilohm

FRONT SPEAKERS: Accept speakers of 8 - 16 ohms

REAR SPEAKERS:

Accept speakers of 8 - 16 ohms

CENTER SPEAKERS:

Accept speaker of 6 - 16 ohms

SUPER WOOFER SPEAKERS:

HEADPHONES:
Tone buttons

System

FM tuner section
Tuning range
Antenna terminals

Accept speaker of 4 ~16 ohms

Accept low and high impedance

BASS: Boost/cut range :7 dB (100
Hz)

TREBLE: Boost/cut range :7 dB (10
kHz)

FM stereo, FM/ AM superheterodyne
tuner

Quartz-locked ILL digital
synthesizer system

875 - 108 MHz
75 ohms unbalanced
300 ohms balanced

Intermediate trequencleJ MHz

- Continued on page 2 -

COMPACT DISC DECK RECEIVER
S 0 NY;

Page 2

Sensitivity (at 50 dB quieting)

22.1 dBf, 7 uV (mono)
4211 dBf, 70 pV (stereo)
Usable sensitivity 195 dBf, 5 uV (IHF)
Signal-to-noise ratio (at 75 kHz deviation)

80 dB (mono)

75 dB (stereo)

35 dB at 1 kHz

55 dB at 400 kHz
03% (mono) at 1 kHz
05% (stereo) at 1 kHz
AM tuner section
Tuning range

Separation
Selectivity
Harmonic distortion

AEP, UK, German model :
531- 1,602kHz

US, Mexican model :
530-1,710kHz(10kHz)
S31-1,710kHz(9kHz)

Antenna AM loop antenna, External antenna
terminals
Intermediate frequency
450 kHz
Usable sensitivity AM loop antenna: 500 uV/m
(1,000 kHz)
Signal-to-noise ratio 54 dB
Harmonic distortion 0.5%
Selectivity 38 dB (10 kHz)
System 4-track Z-channel stereo

Frequency response (DOLBY NR OFF)
With TYPE ll cassette (Sony
UCX-S): 30 - 14,000 Hz (:3 dB)
With TYPE I cassette (Sony HF-S):
30 - 13,000 Hz (:3 dB)

Wow and flutter 0,12% WRMS (NAB)

Compact Disc

System Compact disc digital audio system
Laser Semiconductor laser
Wavelength 780-790 nm

Frequency response
Harmonic distortion

Power requirement

2 HZ-ZO kHz (11.5 dB)
Less than 0.03 % (1 kHz)

US, Mexican model : 120 V AC, 60Hz
AEP, UK, German model :

220- 230 V AC, 50/60Hz

US, Mexican model : 280 W

AEP, UK, German model : 260W

Power consumption

Dimensions Approx 430 x 410 x 400 mm (w/h/d)
(17 x163/16 x 15/ inches)
(including projecting parts and
controls)
Mass Approxr 15.2 kg (33 lb 9 02) net

Accessories supplied
AM loop antenna (1)
FM wire antenna (1)
Remote Commander RM-U451 (1)
Sony batteries SUM-3(NS) (2)

Design and specifications are subject to change without
notice

This appliance is classified as a CLASS I LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exteriort

CLASS 1 LASER PRODUCT
LUOKAN 1 LASERIAITE

KLASS i LASERAPPARAT

Laser component in this product is capable oi emitting radiation
exceeding the limit for Class it

The following caution label is located inside the unit.

CAUTION
ADVAFISEL

,INVSIBLE LASER MDIAIION was" owsn
Avovu foostmE io arm

Ausmuo usrnsrmuuo vso AHNING um
SIKKERNEDSAF nfivoini an up: AF rummow
uuom uos EHKLSE roe stmuuo

.AVAHAESSA JA SUWALUKHUS owzruzssa
oter AUTINA ussnsArritvLLE

rusensrmuuo w DENNA DEL m ammo
ocn SPARMN AH unxoPPLAD

ADVARSEL .USYNLIG LASERSIRAUNG NM DKKSEL APNES

. UNNGA : KSVONF we run sum: N

VARO!
VARNING

CAUTION
Use of controls or adjustments or performance
of procedures other than those specified herein
may.result in hazardous radiation exposure.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body
During repair, pay attention to electrostatic break down and also use
the procedure in the printed matter which is included in the repair
parts

The flexible board is easily damaged and should be handled with
care

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical
pick-up blockr Therefore, when checking the laser diode emission,
observe more than 25cm away form the objective lens.

CHUCK PLATE JIG 0N REPAIRING

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig,
0 Code number of Chuck Plate Jig : X~4918~255<1

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