Sony HCD-RX55 Schematic

HCD-RXD3

RTV servis Horvat

Tel: ++385-31-856-637 Tel/fax: ++385-31-856-139 Mob: 098-788-319

www.rtv-horvat-dj.hr

SERVICE MANUAL

HCD-RXD3 is the tuner, deck, CD and amplifier section in MHC-RXD3.

Model Name Using Similar Mechanism HCD-RX55

SECTION

TAPE

DECK

SECTION

CD Mechanism Type CX3 Base Unit Type KSM-213ECM Optical Pick-up Type KSS-213ECM/C2NP Model Name Using Similar Mechanism NEW T ape Transport Mechanism T ype CWL-44-FR

US Model

Canadian Model

AUDIO POWER SPECIFICATIONS: (U.S.A. model only)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

with 6 Ω loads both channels driven, from 70 – 20,000 Hz; rated 50 W per channel minimum RMS power, with no more than 0.9% total harmonic distortion from 250 mW to rated output.

Amplifier section

Continuous RMS power output

60W + 60W (6 Ω at 1 kHz, 10% THD)

Inputs

MD IN (phono jack): voltage 450mV,

impedance 47 kΩ

Outputs

MD OUT (phono jacks):

voltage 250mV impedance 1k Ω

PHONES (stereo phone jack):

accepts headphones of 8 Ω or more.

SPEAKER: accepts impedance of

6 to 16 Ω

SPECIFICATIONS

CD player section

System Compact disc and digital

audio system

Laser Semiconductor laser

(λ = 780 nm) Emission duration: continuous

Laser output Max. 44.6µW*

*This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pock-up Block with 7 mm

aperture. Frequency response 20Hz – 20kHz (±0.5 dB) Wavelength 780 – 790 nm DIGITAL OUT (OPTICAL) (Square optical connector jack, rear panel) Wavelength 600 nm Output Level –18 dBm

Tape deck section

Recording system 4-track 2-channel stereo Frequency response 40 – 13,000 Hz (±3 dB),

using Sony TYPE I

cassette

MINI Hi-Fi COMPONENT SYSTEM

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tunr section

Tuning range 87.5 – 108.0 MHz Antenna FM lead antenna Antenna terminals 75 Ω unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning renge 531 – 1,602 kHz

(with AM tuning interval set at 9 kHz) 530 – 1,710 kHz (with AM tuning interval

set at 10 kHz) Antenna AM loop antenna Antenna terminals External antenna

terminal Intermediate frequency 450 kHz

— Continued on next page —

MICROFILM

SAFETY CHECK-OUT

www.rtv-horvat-dj.hr

General

Power requirements 120V AC, 60Hz Power consumption 105W Dimensions (w/h/d) incl. projecting parts and controls

Mass Approx. 9kg (19 lb 13 oz.) Supplied accessories: AM loop antenna (1)

Design and specifications are subject to change without notice.

Approx. 280 × 320 × 400 mm

(11

/8 × 125/8 × 153/4 in)

FM lead antenna (1) Remote (1) Plug adaptor (for Asian model) (1)

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.

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 A C leakage. Check leakage as described below.

LEAKAGE

The AC leaka ge 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 microamperes). 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. Follo w 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 v oltmeter . The “limit” indication is 0.75 V, so analog meters must have an accurate low-volta ge scale. The Simpson 250 and Sanwa SH-63Trd are e xamples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

T o Exposed Metal

Parts on Set

0.15

1.5 k

Ω

Voltmeter (0.75 V)

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

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

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

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.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

— 2 —

TABLE OF CONTENTS

www.rtv-horvat-dj.hr

1. GENERAL

·········································································· 4

2. DISASSEMBLY

2-1. CD Door ············································································· 5 2-2. Front Panel ········································································· 6 2-3. Main Board·········································································6 2-4. Amplifier Board ································································· 7 2-5. CD Tray ·············································································· 7 2-6. Decord Board ····································································· 8 2-7. Base Unit ············································································ 9 2-8. Cassette Lid ········································································ 9

3. TEST MODE ···································································· 10

4. MECHANICAL ADJUSTMENTS ····························· 11

5. ELECTRICAL ADJUSTMENTS ······························· 11

6. DIAGRAMS

6-1. Circuit Boards Location ··················································· 16 6-2. Block Diagrams ································································ 17

Main Section····································································· 17

Tuner, CD Section ···························································· 19 6-3. Printed Wiring Board Main Section ······························· 23 6-4. Schematic Diagram Main (1/3) Section ························· 25 6-5. Schematic Diagram Main (2/3) Section ························· 27 6-6. Schematic Diagram Main (3/3) Section ························· 29 6-7. Printed Wiring Board Front Panel Section ····················· 31 6-8. Schematic Diagram Front Panel Section························33 6-9. Printed Wiring Board Amplifier Section ························ 35 6-10. Schematic Diagram Amplifier Section ···························37 6-11. Printed Wiring Board CD Section ·································· 39 6-12. Schematic Diagram CD Section ····································· 41 6-13. IC Pin Function ································································ 43 6-14. IC Block Diagrams ··························································· 45

7. EXPLODED VIEWS

7-1. Cabinet Section································································· 49 7-2. Front Panel Section ·························································· 50 7-3. CD Mechanism Deck Section-1 ······································· 51 7-4. CD Mechanism Deck Section-2 ······································· 52 7-5. Base Unit Section (KSM-213ECM)·································53

8. ELECTRICAL PARTS LIST·······································54

— 3 —

www.rtv-horvat-dj.hr

SECTION 1

GENERAL

56 7 8 9

1 #£

#™ #¡ #º @ª

@•

@¶

@§

1 1/u (Power) button 2 TIMER SELECT button 3 CLOCK/TIMER SET button 4 ( (TAPE A) button 5 9 (TAPE B) button 6 ( (TAPE B) button 7 p (STOP) button 8 ^ (CD) button 9 DISPLAY/DEMO button !º FUNCTION button !¡ TUNER/BAND button !™ + button !£ + + button !¢ CD SYNC button !∞ PAUSE button !§ REC button

@∞

!º !¡ !™

!£

!¢

!∞

!§

!¶

!•

!ª @º @¡

@¢

@£

@™

!¶ 6 OPEN/CLOSE button !• DISC SKIP/EX-CHANGE button !ª DISC 3 button @º DISC 2 button @¡ DISC 1 button @™ DECK B @£ ENTER/NEXT button @¢ VOLUME knob @∞ DECK A @§ REPEAT/STEREO/MONO button @¶ PLAY MODE/TUNER MEMORY button @• EDIT/DIRECTION button @ª DBFB button #º FILE SELECT button #¡ PHONES jack #™ = – button #£ = button

— 4 —

SECTION 2

CD door

T op cover

Remove the

claws

Remove the

claws

Remove the

claws

Three screws

Three srews

Five screws

Pull out the CD tray and remove the CD door with releasing claws into the directioin of arrow.

www.rtv-horvat-dj.hr

DISASSEMBLY

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

2-1. CD DOOR

— 5 —

2-2. FRONT PANEL

www.rtv-horvat-dj.hr

MAIN board

!º

Front panel

Remove the

claws

Board to board connectors (CN602) (CN601)

Harness

(CN303)

Three screws

Screw

Connector

(to deckB)

Connector

(CN201)

(CN705)

Flat type wire

(CN501)

Flat type wire

2-3. MAIN BOARD

CD mechanism deck

Harness (CN301)

Connector

(CN703)

T wo screws

Five screws

MAIN board

Harness (CN701)

— 6 —

2-4. AMPLIFIER BOARD

www.rtv-horvat-dj.hr

!º

AMPLIFIER board

Connector

(CN703)

Three screws

Remove the claws

Rear cover

T wo screws

Three screws

2-5. CD TRA Y

Bracket

Three screws

Screw

T wo screws

Flat type wire

(CN06)

CD tray

— 7 —

Bracket

Screw

2-6. DECORD BOARD

www.rtv-horvat-dj.hr

Connector

(CN707)

CD decode board

Flat cable

(CN706)

Connector

(CN702)

Three screws

Flat cable (CN701)

— 8 —

2-7. BASE UNIT

www.rtv-horvat-dj.hr

UD-Cam

Screw

UD-gear

Spring

2-8. CASSETTE LID

Spring

Base unit

Spring

T wo screws

Cassette door (Note: Four claws are used.)

— 9 —

SECTION 3

www.rtv-horvat-dj.hr

TEST MODE

Function Key combination Description

Initialization

STOP + POWER OFF All preset data is re-set to the initial (default) value.

Model display

STOP + DISC 1 Mode name is displayed.

Destination display

STOP + DISC 2 Destination is displayed.

Version display

STOP + DISC 3 Version number of the microprocessor is displayed.

CD aging mode

STOP + DISC SKIP/EX-CHANGE Set discs to DISC 1 and DISC

3. The following operations are repeated when aging

starts:

1. DISC 1: TOC Read

2. Plays back the last music of the DISC 1

3. DISC 3 : TOC Read

4. Plays back the last music of the DISC 3.

5. STOP

6. Tray is open and closed.

CD service mode

STOP + OPEN/CLOSE The message “CD S - -” is displayed on the screen. The sled is moved to the outer circumference while the FF button is pressed. Also, the SLED is moved to the inner circumference while the REW button is pressed. After pressing the PLAY button, FOCUS is turned ON, CL V-S is set, TRACKING and SLED servos are turned OFF and ADDRESS 3 = 3F, 37 is set.

Display

STOP + DBFB All displays are turned ON.

Balance adjustment value

STOP + DISPLAY/DEMO The balance adjustment value is displayed.

Key check

STOP + FILE SELECT Function of the pressed key is displayed.

TAPE aging mode

STOP + PLAY A Insert a commercially available cassette tape (10 min) to the decks A and B. When aging starts, each tape is rewound and the following

operations are repeated:

1. TAPE A: FWD PLAY for one minute

2. TAPE A: FWD STOP for one second

3. TAPE A: FWD PLAY for three minutes

4. TAPE A: FWD FF to tape end

5. TAPE B: FWD PLAY for one minute

6. TAPE B: FWD REC PAUSE for one second

7. TAPE B: FWD REC for three minutes

8. TAPE B: FWD FF to tape end

9. TAPE B: REV PLAY for one minute

10. TAPE B: REV REC PAUSE for one second

11. TAPE B: REV REC for three minutes

12. TAPE B: REV FF to tape end.

— 10 —

SECTION 4

www.rtv-horvat-dj.hr

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured alcohol-moistened swab: record/playback head pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Torque

FWD FWD

back tension

FF/REW

Torque meter

CQ-102C

CQ-201B

Meter reading

40 to 70 g • cm

(0.56 - 0.97 oz • inch)

1 to 5 g • cm

(0.01 - 0.07 oz • inch)

55 to 140 g • cm

(0.76 - 1.94 oz • inch)

DECK SECTION 0 dB=0.775V

1. Demagnetize the record/playback head with a head demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the parts adjusted.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

Tape

P-4-A100

WS-48B

Record/Playback Head Azimuth Adjustment (Deck A, Deck B)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode : Playback

Signal

10 kHz, –10 dB

3 kHz, 0 dB

Used for

Azimuth Adjustment

Tape Speed Adjustment

test tape P-4-A100 (10kHz, –10dB)

2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 2 dB of peak.

L-CH peak

screw position

output level

R-CH peak

SPEAKER terminal (JK401)

set

within 2dB

L-CH peak

R-CH peak

level meter

within 2dB

screw position

— 11 —

3. Mode: Playback

www.rtv-horvat-dj.hr

Tape Speed Adjustment (Deck A)

test tape P-4-A100 (10kHz, –10dB)

in phase 45˚ 90˚ 135˚ 180˚

SPEAKER terminal (JK401) (L-CH)

SPEAKER terminal (JK401) (R-CH)

Waveform of oscilloscope

good wrong

oscilloscop

4. After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location:

Remove the cassette lid before adjustment (See page 9)

Procedure:

1. Mode: Playback

test tape WS-48B (3kHz, 0dB)

set

SPEAKER terminal (JK401)

frequency counte

–

2. Adjust the SFR501 so that the frequency counter reads 3,000 Hz ± 90Hz.

Adjustment Location: MAIN board

Sample Value of Wow and flutter

W. RMS (JIS) within 0.3% (test tape: WS-48B)

[MAIN BOARD] — Component side —

CN601

Adjustment screws REC/PB head (deck B) or PB head (deck A)

Tape Speed

CN501

SFR501

— 12 —

TUNER SECTION 0 dB=1µV

www.rtv-horvat-dj.hr

AM T uning Voltage Adjustment

Main board

TP1

G VT

Procedure:

1. Set the reception frequency of the unit to 530 kHz.

2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.

3. Set the reception frequency of the unit to 1,710 kHz.

4. Confirm that the voltage reading on the DC voltmeter is within

8.0 ± 0.5 V.

Adjustment Location: MAIN board (See page 14)

AM T racking Adjustment

AM RF SSG

DC voltmeter

+ –

loop antenna

loop antenna (Supplied accessories)

set

30% amplitude modulation by 400 Hz signal

Procedure:

1. Tune the set to 600 kHz.

2. Set the output of AM RF SSG so that the input level of the set will become 60 dB (µV/m).

3. Adjust L104 so that when the waveform on the oscilloscope is maximum, no noise appears.

4. Tune the set to 1,400 kHz.

Field strength dB (

60 cm

V/m) =SSG output level dB (µV/m) –26 dB.

5. Adjust TC102 so that when the waveform on the oscilloscope is maximum, no noise appears.

• Repeat the procedures in each adjustment several times, and the

tracking adjustment should be finally done by the trimmer capacitors.

Adjustment Location: MAIN board (See page 14)

AM ANTENNA terminal (TM1)

— 13 —

FM Tuned Level Adjustment

www.rtv-horvat-dj.hr

FM RF SSG

Ω

coaxial

set

Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz deviation (100%) Output level : 28 dB (at 75 W open)

FM ANTENNA terminal (JK101)

Procedure:

1. Supply a 28 dB 98 MHz signal from the ANTENN A terminal.

2. Tune the set to 98 MHz.

3. Adjust SFR101 to the point (moment) when the TUNED indicator will change from going off to going on.

Adjustment Location: MAIN board

Adjustment Location

[MAIN BOARD] — Component side —

JK101

L104

TC102

AM T rac king

AM T uning Voltage

L105

SFR101

TP1

FM T uned Level

— 14 —

+ 32 hidden pages