Sony HCD-VX3A - User Manual

HCD-VX3A
E Model
Tourist Model
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks
of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism HCD-VX5A/VX5AJ/VX7A
CD CD Mechanism Type CDM38L-5BD34L
Section Base Unit Name BU-5BD34L
Optical Pick-up Name KSS-213D/Q-RP
Tape deck Model Name Using Similar Mechanism HCD-GRX30
Section Tape Transport Mechanism Type TCM-230AWR2/230PWR2
— Continued on next page —
SPECIFICATIONS
HCD-VX3A is the Amplifier, CD player,
Tape Deck and Tuner section in MHC-VX3.
Amplifier section
The following measured at AC 110, 220 V 50/60 Hz
DIN power output (rated) 60+60 W
(6 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
80+80 W
(6 Ω at 1 kHz, 10 % THD)
The following measured at AC 120, 240 V 50/60 Hz
DIN power output (rated) 70 + 70 W
(6 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
100+100 W
(6 Ω at 1 kHz, 10 % THD)
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kΩ
MIX MIC: sensitivity 1 mV,
(phono jack) impedance 10 kΩ
Outputs
MD/VIDEO (AUDIO) OUT:
(phono jacks) voltage 250 mV
impedance 1 kΩ
PHONES: accepts headphones of 8 Ω or more
(stereo mini jack)
SPEAKER: accepts impedance of 6 to 16 Ω
SUPER WOOFER: voltage 1 V, impedance 1 kΩ
VIDEO CD/CD player section
System Compact disc, 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 a 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
Video color system format NTSC, PAL
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level -18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40-13,000 Hz (±3 dB),
(DOLBY NR OFF) using Sony TYPE I casette
40-14,000 Hz (±3 dB),
using Sony TYPE II casette
Wow and flutter ±0.15 % W.Peak (IEC)
0.1 % W.RMS (NAB)
±0.2 % W.Peak (DIN)

Summary

SECTION 1 SERVICING NOTES

SAFETY CHECK-OUT

Procedures for ensuring safety after repairs, checking connections and parts.

SECTION 3 DISASSEMBLY

Case Removal

Front Panel Section Disassembly

Tape Mechanism Deck Removal

CD Mechanism Deck Removal

Main Board Removal

SECTION 4 TEST MODE

MC Cold Reset

Clears RAM data to factory settings, used for customer return.

CD Delivery Mode

Positions the pickup for safe transport after repair.

MC Hot Reset

Resets the unit while retaining preset data in memory.

Sled Servo Mode

Allows manual control of the CD sled motor for maintenance.

AMS Test Mode

Used to check the Automatic Music Sensor (AMS) operation of the tape deck.

Video CD Color-Bars Mode

Outputs color bars and 1kHz tone for video signal check.

SECTION 5 MECHANICAL ADJUSTMENTS

Precautions for Mechanical Adjustments

Torque Measurement

Record;Playback Head Azimuth Adjustment

Procedure for aligning the tape head azimuth for optimal playback.

SECTION 7 DIAGRAMS

Sony HCD-VX3A Specifications

General

CD Player	Yes
Tuner	FM/AM
Cassette Deck	Dual
Speaker Configuration	2-Way
Type	Mini Hi-Fi System
Power Output	100W (50W per channel)
Functions	CD, Cassette, Radio
Speaker System	2 Speakers
CD Player Type	Single Disc