Sony CDP-490 Service Manual

Silage
SERVICE MANUAL
Model CDP-490 is almost same as CDP-590.
As only the difference from CDP-590 is described in this manual,
please refer to the CDP-590 service manual for the other sections.
; Canadian Model
AEP Model
@SECTION 6 EXPLODED VIEWS AND PARTS LIST
Page on
CDP-590
Service Manual
Description
1 4-933-208-31 (AEP)... ..... PANEL, LOADING
1 4-933-208-41 (Canadian)... PANEL, LOADING
4 * 3-703-244-00 (Canadian)... BUSHING(2104), CORD
5 * 4-933-201-51 (Canadian)... PANEL, BACK
21 5 | *4-933-201-61 (AEP)......... PANEL, BACK
8 X-4885-950-1 (Canadian)... FOOT ASSY
901 * A-4617-494-A (Canadian)... MOUNTED PCB, MAIN
907 | A1-575-105-11 (Canadian)... CORD, POWER
T701 | A1-449-921-11 (Canadian)... TRANSFORMER, POWER
22 51 X-4933-205-1 (Canadian)... PANEL ASSY, FRONT
51 A-4604-399-A | — (AEP)......... PANEL ASSY, FRONT
@SECTION 7 ELECTRICAL PARTS LIST
ACCESSORY & PACKING MATERIAL
Page on
CDP-590 Part No. Description
Service Manual
27 3-750-792-11 (Canadian)... MANUAL, INSTRUCTION
* 4-933-231-21 INDIVIDUAL CARTON
Note: The CDP-490 has not been supplied with remote commander.
MICROFILM
9-955-801-11
COMPACT DISC PLAYER
Sony Corporation
Audio Group
SONY.
English
90D1850-1
Printed in Japan
©1990.4
Published by Customer Relations and Service Group.

Sony CDP-490 Specifications

General

Type	CD Player
Disc format	CD
Digital converter	1-bit DAC
Channels	2
Signal-to-Noise Ratio	100 dB
Digital Output	Coaxial
Weight	3.5 kg
Channel separation	90 dB
Output Voltage	2 V
Power Consumption	15 W
Frequency Response	2 Hz - 20 kHz
Line output	2V
Dimensions (W x H x D)	430 x 100 x 300 mm

Summary

SECTION 6 EXPLODED VIEWS AND PARTS LIST

SECTION 7 ELECTRICAL PARTS LIST

SPECIFICATIONS

SAFETY-RELATED COMPONENT WARNING!!

Critical safety warning regarding component replacement.

SAFETY CHECK-OUT

LEAKAGE TEST

Procedure for testing AC leakage from metal parts to earth ground.

SERVICING NOTE

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

Precautions for handling sensitive optical components to prevent damage.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

CAUTION

Warning about hazardous radiation exposure from improper adjustments.

SECTION 3 DISSASSEMBLY OF BASE UNIT

SECTION 4 ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

General instructions for performing electrical adjustments.

RF LEVEL check

Procedure for checking the RF signal level after component replacement.

RF PLL Free-run Frequency Check

Method to verify the RF PLL free-run frequency.

E-F Balance Check

Focus/Tracking Gain Adjustment

Simple Adjustment

5-3. SCHEMATIC DIAGRAM

BD BOARD

DISPLAY BOARD

BD BOARD

DISPLAY BOARD

E MODEL

SECTION 6 EXPLODED VIEWS

6-1. CABINET SECTION

6-2. FRONT PANEL SECTION

6-3. MD SECTION-1 (CDM14-5BD1)

6-4. MD SECTION-2 (BU-5BD1)