Sony RCD-W3 Service Manual

18
RCD-W3
Procedure:
1. Eject a disc from CD-R.
2. Select “Laser Power Setup” on “LD Inspection” pull-down
menu, then “Laser Power Setup (Manual)” window is open.
3. Click VRDC, then Pick-up moves outward and LD turns on.
4. Measure the LD power with a LD power meter. Write its value
to the blank of “Read Power” column.
(Write a value to two decimal places. Ex: Write “93” in case of
0.93mW.)
5. Click VWDC1, then LD turns on.
6. Measure the LD power with a LD power meter. Write its value
to the blank of “Write Power” column.
(Write a value to two decimal places. Ex: Write “1234” in case
of 12.34mW.)
7. Click LD Off to turn LD off.
8. Click Setup, then setting is over and a result is displayed.
(“OK”/“NG” is displayed for every items.)
9. Click X to close “Laser Power Setup (Manual)” window.
Fig 6 : Laser power setup window
Fig 5 : LD inspection menu windows
Description of each parameter
VRDC: Used on the Read Power setting in case of reading CD-RW and CD-R. (DAC value on 100mW.)
VWDC: There is VWDC1 (Write power) pin in the optical pick-up block. The recording power is set by it and VWDC2
(Over drive) pin. Used on setting VWDC1 pin power on recording. (Unit: DAC value/10mW)
VWDC2: Used on setting VWDC2 (Over drive) pin power on recording. (Unit: DAC value/5mW)
VWDC2 Offset: Used on setting VWDC2 (Over drive) pin power with VWDC2 parameter on recording. (Unit: DAC value)
Specification of each parameter
20<read power<200
100<write power<2000
30<VRDC<150
48<VWDC1<150
50<VWDC2<145
VWDC2 Offset<35
Fig 8 : Read calibration results window
Fig 7 : Calibration menu windows
Adjustment Data Check
Check if the error has occurred on reading “CD-R LD POWER SETTING” value.
Procedure:
1. Select “Calibration” on “Calibration” pull-down menu, then “Read Calibration Results” window is open.
2. Click Read, then the calibration data are displayed.
3. Data specification
CD-R VRDC DAC: 30-150
VWDC1: 48-150
VWDC2: 50-145
VWDC2 Offset: 0-35
4. Click X to close “Read Calibration Results” window.

Sony RCD-W3 Specifications

Power

power requirements	U.S.A. and Canada 120 V AC, 60 Hz
power requirements other countries	110 – 240 V AC, 50/60 Hz
power consumption	20 W

Audio Specifications

frequency response	20 Hz – 20, 000 Hz (±0.5 dB)
signal-to-noise ratio	More than 100 dB
dynamic range	More than 95 dB

Inputs

analog in impedance	47 kilohms
rated input	330 mVrms
minimum input	125 mVrms

Outputs

analog out rated output	2 Vrms (at 50 kilohms)
load impedance	over 10 kilohms
phones	28 mW, 32 ohms

Weight and Dimensions

dimensions	430 × 108 × 368 mm
mass	4.6 kg