Sony RDX-700, RXD-700 Service manual

RXD-700

SERVICE MANUAL

SPECIFICATIONS

AEP Model

UK Model

Model Name Using Similar Mechanism NEW CD Drive Mechanism Type Optical Pick-up Name KSS-213C/Q-RP

Amplifier section

Continuous RMS power output

55 + 55 watts

(4 ohms at 1 kHz, 0.7% THD) Inputs TAPE LINE IN (phono jacks):

sensitivity 150 mV, impedance 50

kilohms Outputs TAPE REC OUT (phono jacks):

150 mV, 4.7 kilohms SPEAKER: accepts impedance of 4 to 16 ohms,

8 to 16 ohms (SPEAKER A + B).

CD player section

System Compact disc and digital audio system Laser Semiconductor laser

(λ = 780 nm)

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.

Wavelength 780 - 790 nm Frequency response 20 Hz - 20 kHz (± 0.5 dB) Signal-to-noise ratio More than 114 dB Dynamic range More than 100 dB Harmonic distortion Less than 0.003 % Channel separation More than 108 dB (1 kHz, 20 kHz LPF)

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 - 108.0 MHz

Aerial FM wire aerial Aerial terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz Sensitivity at 26 dB quieting

Usable sensitivity (IHF) 10.3 dBf, 0.9 µV/ 75 ohms S/N at 40 kHz deviation

Harmonic distortion at 1 kHz Mono: 0.04%

Separation 45 dB at 1 kHz Frequency response 30 Hz - 15 kHz (+0.3/-0.7)

(50 kHz step)

(mono) 10.3 dBf, 0.9 µV/ 75 ohms at 46 dB quieting (stereo) 38.5 dBf, 23 µV/ 75 ohms

Mono: 75 dB Stereo: 70 dB

Stereo: 0.07%

– Continued on next page –

MICROFILM

CD RECEIVER

– 1 –

AM tuner section

surface of objective lens

Tuning range 531 - 1,602 kHz

Aerial AM loop aerial, External aerial

Intermediate frequency 450 kHz Usable sensitivity 300 µV/m S/N 50 dB (50 mV/m, 999 kHz) Harmonic distortion 0.3 % (50 mV/m, 400 Hz)

General

Power requirements 230 V AC, 50/60 Hz Power consumption 150 watts Dimensions (w/h/d) Approx. 440 × 110 × 340 mm (17 3/8 ×

Mass Approx. 7.4 kg (16 lb. 5 oz.) Supplied accessories Remote commander (remote) RM-U301 (1)

Design and specifications are subject to change without notice.

(9 kHz step)

terminals

4 3/8 × 13 1/2 in) incl. projecting parts and controls

R6 (size AA) batteries (2) AM loop aerial (1)

SERVICE NOTE

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

NOTES ON CLEANING THE OBJECTIVE LENS

cotton swabs

objective lens

2-axis actuato

2-axis cover

slide base

Apply CD lens cleaner B-4 (Part No.:J-2501-000-A) to cotton swabs (narrow type) (Part No.:J-2501-023-A) to be lightly wet. Use a force (about 5 g (0.18 oz)) to make the objective lens in contact with the bottom lightly, and clean the lens by spirals as following below. Replace the cotton swab and repeat this cleaning two or three times.

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.

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

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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.

NOTES ON PICK-UP FLEXIBLE BOARD

The pick-up flexible board in this set is secured to the optical pickup with an adhesive tape. Once the tape is removed, an adhering force becomes weak, and it cannot be reused. Therefore, if the optical pick-up is replaced, replace also the pickup flexible board with a new one.

Notes:

Do not force to push the objective lens. Otherwise, the plate spring supporting the objective lens will be bent, causing a deteriorated RF waveform. Never touch anything other than the objective lens. Otherwise, a significant deterioration occurs in the RF waveform.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PAR TS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

The following caution label is located inside the unit.

TABLE OF CONTENTS

1. GENERAL

Getting Started

Unpacking........................................................................... 4

Hooking Up the System...................................................... 4

Setting the Clock ................................................................ 5

Presetting Radio Stations.................................................... 5

Basic Operations

Selecting a Source .............................................................. 6

Playing a CD....................................................................... 6

Receiving Preset Stations ................................................... 7

2. DISASSEMBLY

2-1. Cabinet (Top) ..................................................................... 8

2-2. Front Panel (1) ................................................................... 8

2-3. Front Panel (2) ................................................................... 9

2-4. Front Board ........................................................................ 9

2-5. Mechanism Block ............................................................ 10

2-6. Chassis (Back).................................................................. 10

2-7. Power Transformer........................................................... 11

2-8. Main Board ...................................................................... 11

3. ELECTRICAL ADJUSTMENTS

FM Section ........................................................................... 12

AM Section........................................................................... 13

Audio Section ....................................................................... 13

Front Section ........................................................................ 13

CD Section ........................................................................... 13

4. DIAGRAMS

4-1. Block Diagram –CD Section–.......................................... 15

4-2. Block Diagram –Tuner Section–...................................... 17

4-3. Circuit Boards Location ................................................... 19

4-4. Printed Wiring Boards –CD Section– .............................. 21

4-5. Schematic Diagram –CD Section–................................... 23

4-6. Printed Wiring Board –Front Section–............................. 27

4-7. Schematic Diagram –Front Section– ............................... 31

4-8. Printed Wiring Boards –Main Section– ........................... 36

4-9. Schematic Diagram –Main Section (1/2)– ....................... 39

4-10. Schematic Diagram –Main Section (2/2)– ....................... 43

5. EXPLODED VIEWS

5-1. Case Section ..................................................................... 51

5-2. Front Panel Section .......................................................... 52

5-3. Chassis Section ................................................................ 53

5-4. CD Mechanism Section ................................................... 54

5-5. Optical Pick-up Section ................................................... 55

6. ELECTRICAL PARTS LIST ................................... 56

– 3 –

SECTION 1

GENERAL

This section extracted from instruction manual.

– 4 –

– 5 –

– 6 –

– 7 –

SECTION 2

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

2-1. CABINET (TOP)

screws

(case)

screws

(case)

screws

(case)

cabinet (top)

2-2. FRONT PANEL (1)

screw

(case)

BVTP 3x8

lug plate

screws

(case)

screw

(case)

BVTP 3x8

– 8 –

BVTP 3x8

2-3. FRONT PANEL (2)

claw

nut

BVTP 3x8

CN404

claw

CN101

CN103

2-4. FRONT BOARD

BVTP 3x8

knob (volume)

BVTP 3x8

button (control)

front panel

BVTP 3x8

!¡

button (function)

TONE boar

FRONT board

claw

claws

– 9 –

knob (control)

2-5. MECHANISM BLOCK

BVTP 3x8

mechanism block

CN402

2-6. CHASSIS (BACK)

BVTP 3x8

screw (BV/RING)

BVTP 3x8

chassis (back)

CN403

CN107

BVTP 3x8

– 10 –

2-7. POWER TRANSFORMER

CN102

BVTT 4x8

power transformer

BVTT 4x8

2-8. MAIN BOARD

BVTP 3x16

BVTP 3x8

MAIN board

BVTP 3x8

support (cb locking)

– 11 –

HEADPHONE board

BVTP 3x8

SECTION 3

DISASSEMBLY

FM SECTION

0 dB = 1 µV

Cautions during repair

When the front end is defective, replace it by a new one because its internal block is difficult to repair.

FM Discriminator Adjustment (NULL and MONO Distortion Adjustment)

Setting :

TUNER button : FM

FM ANTENNA 75

Ω

COAXIAL

FM RF SSG 1 kHz

Carrier frequency : 98.0 MHz Output level : 60 dB (1 mV) Mode : mono Modulation : 1 kHz, 75 kHz deviation (100%)

TP701 NULL terminal

TAPE REC OUT

set

high pass filter

digital voltmeter (DC range)

distortion meter

Procedure :

1.Tune the set to 98.0 MHz.

2.Adjust L702 for 0 ± 25 mV reading on the digital voltmeter.

............NULL

3.Adjust L703 for a minimum reading on the distortion meter.

............MONO Distortion (THD)

4.Repeat the adjustments of 2 and 3 several times.

FM Stereo Separation Adjustment

Setting :

TUNER button : FM

FM ANTENNA 75

Ω

COAXIAL

FM RF SSG level meter

Carrier frequency : 98.0 MHz Output level : 60 dB (1 mV) Mode : stereo Modulation : main : 1 kHz, 37.5 kHz deviation (50%)

sub : 1 kHz, 37.5 kHz deviation (50%) 19 kHz pilot : 6.75 kHz deviation (9%)

TAPE REC OUT

set

Procedure :

FM stereo

signal generator

output channel

Level meter Level meter

connection reading (dB)

L-CH L-CH A

R-CH L-CH Adjust VR703 for minimum

reading on level meter.

R-CH R-CH C

L-CH R-CH Adjust VR703 for minimum

reading on level meter.

L-CH stereo separation : A – B R-CH stereo separation : C – D

The separations of both channels should be equal.

Note : When replacing the ceramic filter, perform this adjustment.

Adjustment Location : See page 14.

FM Tuning Level Adjustment

Setting :

TUNER button : FM

FM RF SSG

Carrier frequency : 98.0 MHz Output level : 25 dB (17.8 µV) Mode : mono Modulation : no modulation

FM ANTENNA 75

Ω

COAXIAL

set

Procedure :

1.Tune the set to 98.0 MHz.

2.Adjust VR701 so that the TUNED indicator goes on.

3.Confirm that the TUNED indicator goes off with FM RF SSG output level set at 22 dB.

Adjustment Location : See page 14.

– 12 –

FM Stereo Distortion Adjustment

Setting :

TUNER button : FM

FM ANTENNA 75

Ω

COAXIAL

FM RF SSG 1 kHz

Carrier frequency : 98.0 MHz Output level : 60 dB (1 mV) Mode : stereo Modulation : main : 1 kHz, 34.125 kHz deviation (45.5%)

sub : 1 kHz, 34.125 kHz deviation (45.5%) 19 kHz pilot : 6.75 kHz deviation (9%)

TAPE REC OUT

set

high pass filter

distortion meter

AUDIO SECTION

Idle Current Adjustment

Setting :

VOLUME control : MIN

digital voltmeter

CP1 (L-CH), CP2 (R-CH)

Procedure :

1. Adjust VR101 (L-CH), VR102 (R-CH) for 7 ± 0.2mV reading

on digital voltmeter.

(DC range)

Procedure :

1. Tune the set to 98.0 MHz.

2. Adjust IFT on PACK701 for a minimum reading on the distortion meter.

Adjustment Location : See page 14.

AM SECTION

0 dB = 1 µV

AM Tuning Level Adjustment

Setting :

TUNER button : AM

AM RF SSG

loop

Carrier frequency : 999 kHz Output level : 55 dB (0.56 mV)

antenna A

60 cm

loop antenna B

set

Procedure :

1. Set loop antenna A so that the loop antenna B input level becomes 55 dB (0.56 mV)

2. Tune the set to 999 kHz.

3. Adjust VR702 so that the TUNED indicator goes on.

4. Confirm that the TUNED indicator goes off with AM RF SSG output level set at 53 dB.

Adjustment Location : See page 14.

FRONT SECTION

Frequency (Clock) Adjustment

Setting :

frequency counter

TP901

Procedure :

1. Connect the frequency counter to TP901.

2. Adjust C914 for 32.768 kHz ± 0.1 Hz reading on frequency

counter.

Adjustment Location : See page 14.

CD SECTION

• This set is automatically adjustment.

Adjustment Location : See page 14.

– 13 –

Adjustment Location :

– main board (component side) –

FM DISCRIMINATOR ADJ

L702

L703

TP701

VR102 (R-CH) IDLE CURRENT ADJ

CP2 (R-CH)

CP1 (L-CH)

IDLE CURRENT ADJ

VR101 (L-CH)

– front board (component side) –

VR701 FM TUNING LEVEL ADJ

VR703

FM STEREO

SEPARATION ADJ

PACK701

IFT

FM STEREO

DISTORTION

ADJ

VR702 AM TUNING LEVEL ADJ

IC901

TP901

C914 FREQUENCY (CLOCK) ADJ

– 14 –

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