Sony HCD-VX77 - User Manual

1
HCD-VX77/VX77J
SERVICE MANUAL
HCD-VX77/VX77J is the tuner, deck, CD and
amplifier section in MHC-VX77/VX77J.
SPECIFICATIONS
COMPACT DISC DECK RECEIVER
— Continued on next page —
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM58-K2BD37A
Base Unit Type BU-K2BD37A
Optical Pick-up Type KSM-213DAP/Z-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230PWR11
CD
SECTION
TAPE DECK
SECTION
Photo: HCD-VX77
E Model
Amplifier section
The following measured at AC 120, 220, 240V
50/60 Hz
DIN power output (rated) 160 + 160 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
200 + 200 watts
(6 ohms at 1 kHz,
10% THD)
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIC: sensitivity 1 mV,
(phone jack) impedance 10 kilohms
Outputs
VIDEO OUT: max. output level 1 Vp-p,
(Phono jack) unbalanced, Sync
negative, load impedance
75 ohms
S-VIDEO OUT: Y: 1 Vp-p, unbalanced
(4 pin/mini-DIN jack) Sync negative
C: 0.286 Vp-p
load impedence 75 ohms
PHONES: accepts headphones of 8
(stereo mini jack) ohms or more
FRONT SPEAKER:
accepts impedance of 6 to
16 ohms
SURROUND SPEAKER: accepts impedance of
16 ohms
VIDEO CD/CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780nm)
Emission duration:
continuous
Laser output Max. 44.6
µ W*
*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),
using Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Middle Eastern models: 531 – 1,602 kHz
(with the interval set at 9
kHz)
Other models: 531 – 1,602 kHz
(with the interval set at 9
kHz)
530 – 1,710 kHz
(with the interval set at 10
kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate fre
q
uenc
y
450 kHz
9-929-223-12
2001H0200-1
© 2001.8
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
Ver 1.1 2001.08

Summary

Service Note

Disassembly Procedures

Upper Case and Loading Panel Disassembly

Procedures for disassembling the upper case and loading panel assembly.

Front Panel and Tape Mechanism Disassembly

Steps to remove the front panel and tape mechanism deck.

Test Mode Operations

Basic Test Modes

Covers Cold Reset, CD Ship Mode, MC Hot Reset, VACS, and MW tuner step.

MC and Aging Test Modes

Details MC test for component checks and Aging mode for system operation.

Mechanical Adjustments

Electrical Adjustments

Deck Section Adjustments

Covers tape deck mechanical and electrical adjustments like torque and azimuth.

CD Section Adjustments

Details CD section adjustments including S-Curve, RF Level, E-F Balance, and PLL frequency.

Exploded Views

Main Section Exploded View

Shows an exploded view of the main chassis and front panel assembly.

Mechanism Section Exploded Views

Electrical Parts List

Sony HCD-VX77 Specifications

General

CD Player	Yes
Tuner	AM/FM
Speaker Configuration	2 Speakers
Functions	CD, Radio, Cassette, Auxiliary Input
Cassette Deck	Double Cassette Deck