Sony HCD-vx550 Service Manual

SERVICE MANUAL
HCD-VX550 is the Amplifier, Video
CD player, Tape Deck and Tuner
section in MHC-VX550.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol a are trade-
marks of Dolby Laboratories Licensing Corporation.
Amplifier section
The following measured at AC 120, 220, 240 V 50/60
Hz
DIN power output (rated)110 + 110 W
(8 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
140 + 140 W
(8 Ω at 1 kHz, 10% THD)
Inputs
MD IN: voltage 450 mV,
(phono jacks) impedance 47 kΩ
VIDEO (AUDIO) IN: voltage 250 mV,
(phono jacks) impedance 47 kΩ
MIC 1/2 (phone jack): sensitivity 1 mV, impedance
10 kΩ
MICROFILM
HCD-VX550
Model Name Using Similar Mechanism
CD Mechanism Type
CD
Section Base Unit Name
Optical Pick-up Name
Model Name Using Similar Mechanism
Tape deck
Section
Tape Transport Mechanism Type
SPECIFICATIONS
Outputs
MD OUT (phono jacks): voltage 250 mV
impedance 1 kΩ
VIDEO OUT (phono jack):
max,output level
1Vp-p, unbalanced, Sync
negative, load impedance
75 Ω
S-VIDEO OUT (4-pin/ mini-DIN jack):
Y: 1Vp-p, unbalanced,
Sync negative,
C: 0.286Vp-p,
load impedance 75 Ω
PHONES (stereo phone jack):
accepts headphones of 8 Ω
or more
SPEAKER: accepts impedance of 8 to
16 Ω
SUPER WOOFER Voltage 1 V, impedance
Ω
k
MINI Hi-Fi COMPONENT SYSTEM
Chinese Model
SUPER VIDEO CD/VIDEO CD
/CD player section
System Compact disc and digital
audio and video system
Laser Semiconductor laser
(λ=780nm)
Emission duration:
continuous
Laser output Max. 44.6 µW*
*This output is the value
measured at distance of 200
mm from the objective lens
surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response 2 Hz - 20 kHz (±0.5 dB)
Wavelength 780 -790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
1
Video color system format
NTSC, PAL
Continued on next page
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