Sony RCD-W7V Service Manual
RCD-W7V
SERVICE MANUAL
Ver 1.0 2001.12
CD-R
CD/DVD
SPECIFICATIONS
DECK A (the CD/DVD player section)
System CD/DVD player
Laser Semiconductor laser
Signal format system NTSC
Playable discs DVD, CD, CD-R/CD-RW
(for music use), MP3 disc
Frequency response DVD (PCM 96 kHz):
20 Hz to 44 kHz (±1.0 dB)
DVD (PCM 48 kHz):
20 Hz to 22 kHz (±0.5 dB)
CD: 20 Hz to 20 kHz
(±0.5 dB)
Signal-to-noise ratio More than 100dB
(ANALOG OUT connectors only)
Harmonic distortion Less than 0.015%
Dynamic range More than 95 dB (DVD)
More than 95 dB (CD)
Wow and flutter Less than detected value
(±0.001% W PEAK)
Outputs
VIDEO OUT 1.0 Vp-p 75 ohms,
sync negative
S-VIDEO OUT Luminance signal:
1.0 Vp-p, 75 ohms
C: 0.3 Vp-p, 75 ohms
COMPONENT VIDEO OUT Y: 1.0 Vp-p, 75 ohms,
sync negative
(Phono jacks) CB/B-Y, CR/R-Y:
0.7 Vp-p, 75 ohms
US Model
Canadian Model
Model Name Using Similar Machanism NEW
CD Mechanism Type CDM-700(CD-RW)
Optical Pick-up Type KRS-220C
Model Name Using Similar Mechanism NEW
CD/DVD Mechanism Type DP-4RM
Signal-to-noise ratio Over 100 dB during playback
Dynamic range More than 95 dB during playback
Input
ANALOG IN (Phono jacks) Impedance 47 kilohms,
Rated input 330 mVrms
DIGIT AL OPTICAL IN Optical wavelength 660 nm
(Square optical connector jack)
Outputs
ANALOG OUT (Phono jacks) Impedance 47 kilohms, Rated input
2 Vrms
Load impedance over 10 kilohms
DIGIT AL OPTICAL OUT W avelength 660 nm
(Square optical connector jack) Output level -18 dBm
PHONES (Phone jacks) 28 mW, 32 ohms
General
Power requirements 120 V AC, 60 Hz
Power consumption 25W (120 V AC)
Dimensions (approx.) 430 x 107.5 x 370 mm (w/h/d) incl.
projecting parts
Mass (approx.) 5.1 kg
Supplied accessories
• Video cord (1)
• Audio cords (2)
• Remote commander (remote) RM-R70 (1)
• R6 (size AA) batteries (2)
DECK B (the CD-R and CD-RW recording section)
System Compact disc digital audio system
Laser Semiconductor laser
Playable discs CD, CD-R, CD-RW (for music use)
Frequency response 20 Hz to 20,000 Hz (±0.5 dB)
9-873-470-01
2001L0200-1
© 2001.12
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
Design and specifications are subject to change without notice.
COMPACT DISC RECORDER
RCD-W7V
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down 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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
CAUTION
The use of optical instruments with
hazard. As the laser beam
used
harmful to eyes, do not attempt to
Refer servicing to qualified
CAUTION
VISIBLE LASER RADIATION
WHEN OPEN AND
INTERLOCK DEFEATED.
DO NOT STARE INTO BEAM.
this product will increase eye
in
this Compact Disc Recorder is
disassemble the cabinet.
personnel only
This label is located on the rear
panel of your recorder.
.
SAFETY CHECK-OUT
(US model only)
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
0.15µF
1.5kΩ
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
TABLE OF CONTENTS
1. DIAGRAMS
1-1. Circuit Boards Location ...................................................... 3
1-2. Block diagrams – OVERALL Section – ............................4
Block diagrams – CD/DVD Section – ............................... 5
Block diagrams – CD-RW Section – .................................. 6
Block diagrams – I/O Section – .......................................... 7
Block diagrams – Power Section – ..................................... 8
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLA CER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY .
2
1-1. CIRCUIT BOARDS LOCATION
BD board
RCD-W7V
SECTION 1
DIAGRAMS
POWER board
HP board
FL board
VOL board
AUDIO
board
BD-R board
33
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