Sony HCDRX-55 Service manual

HCD-R500/RX55

MICROFILM

SERVICE MANUAL

HCD-R500/RX55 is the tuner, deck, CD and amplifier section in MHC-R500/RX55.

Photo : HCD-RX55

Model Name Using Similar Mechanism HCD-G101

SECTION

TAPE DECK

SECTION

CD Mechanism Type CX3 Base Unit Type KSM-213BCM Optical Pick-up Type KSS-213B/S-N Model Name Using Similar Mechanism NEW Tape Transpor Mechanism T ype

AEP Model

UK Model

CWB44RR10

Amplifier section

North American model

Continuous RMS power output

50 W + 50 W (6 Ω at 1 kHz, 10% THD)

Other models

The following measured at AC 110, 220 V 60 Hz; DIN power output (Rated) 35 W + 35 W (6 Ω at 1 kHz, DIN) Continuous RMS power output (Reference)

45 W + 45W (6 Ω at 1 kHz, 10% THD)

The following measured at AC 120, 240 V 60 Hz; DIN power output (Rated) 40 W + 40 W (6 Ω at 1 kHz, DIN) Continuous RMS power output (Reference)

50 W + 50W (6 Ω at 1 kHz, 10% THD)

Peak music power output (Reference)

600 W

Inputs

MD IN (phone jacks) : voltage 450 mV, impedance 47 kΩ

Outputs

MD OUT (phone jacks) : voltage 250 mV, impedance 1 kΩ 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. 44.6 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. Frequency response 20 Hz – 20 kHz (± 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 (± 3dB), using Sony

TYPE Ι cassette

Tuner section

FM stereo, FM/AM superheterodyne tuner

— Continued on next page —

MINI Hi-Fi COMPONENT SYSTEM

SERVICING NOTE

FM tuner section

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

AM tuner section

Tuning range

European model: MW: 531-1,602 kHz

LW: 153-279 kHz

Other models: AM: 531-1,602 kHz

Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

General

Power requirements

North American model:120 V AC, 60 Hz Mexican model: 120 V AC, 50/60 Hz Australian and South African models:

Other models: 110 – 120 V or 220 – 240 V AC,

Power consumption 100 W Dimensions (w/h/d) incl. projecting parts and controls

Mass Approx. 9.5 kg (20 lb 15 oz.) Supplied accessories: AM loop antenna (1)

Design and specifications are subject to change without notice.

(with MW tuning interval set at 9 kHz)

(with LW tuning interval set at 3 kHz)

(with AM tuning interval set at 9 kHz) 530-1,710 kHz (with AM tuning interval set at 10 kHz)

220 – 240 V AC, 50/60 Hz 50/60 Hz (adjustable with voltage selector)

Approx. 280 × 320 × 400 mm

(11

/8 × 12 5/8 × 15 3/4 in)

Remote (1) RM-SG7 (for HCD-RX55) RM-SG7B (for HCD-R500) FM lead antenna (1)

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

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 DOTTED 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.

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.

This caution label is located inside the unit.

— 2 —

TABLE OF CONTENTS

1. GENERAL ..........................................................................4

2. DISASSEMBLY

2-1. Upper Cover and CD Door................................................. 5

2-2. Front Panel ......................................................................... 5

2-3. Main Board......................................................................... 6

2-4. Amp Board ......................................................................... 6

2-5. CD Tray ..............................................................................7

2-6. CD Decoder Board ............................................................. 7

2-7. Base Unit ............................................................................ 8

2-8. Cassette Door ..................................................................... 8

3. MECHANICAL ADJUSTMENTS ............................... 9

4. ELECTRICAL ADJUSTMENTS ................................. 9

5. DIAGRAMS

5-1. Circuit Boards Location ................................................... 14

5-2. Block Diagrams

• Deck Section ................................................................... 15

• CD Section ...................................................................... 17

5-3. IC Block Diagrams........................................................... 19

5-4. Printed Wiring Board —CD Section — ........................... 24

5-5. Schematic Diagram — CD Section —............................. 29

5-6. Schematic Diagram —Panel Section — .......................... 33

5-7. Printed Wiring Board —Panel Section —........................37

5-8. Printed Wiring Board — Deck Section — ....................... 42

5-9. Schematic Diagram —Deck Section —...........................47

5-10. Schematic Diagram —Main Section — ........................... 51

5-11. Printed Wiring Board —Main Section — ........................ 55

5-12. Printed Wiring Board — Amp Section — ........................60

5-13. IC Pin Function ................................................................65

6. EXPLODED VIEWS

6-1. Cabinet Section................................................................. 67

6-2. Front Panel Section .......................................................... 68

6-3. Cassette Mechanism Deck Section................................... 69

6-4. CD Mechanism Deck Section 1 ....................................... 70

6-5. CD Mechanism Deck Section 2 ....................................... 71

6-6. Base Unit Section (KSM-213BCM)................................. 72

7. ELECTRICAL PARTS LIST ........................................73

— 3 —

LOCATION OF PARTS AND CONTROLS

SECTION 1

GENERAL

#¡ #º

@ª

@•

@¶

@§

@∞ @¢ @£

@™

@¡

@º



!¡

!™ !£

!¢

!∞

!ª

1 DISC 1 button 2 DISC 2 button 3 DISC 3 button 4 DISC SKIP button 5 § OPEN/CLOSE button 6 · (TAPE B) 7 · ∏ (CD) button 8 TUNER/BAND button 9 r REC button !º ∏ PAUSE button !¡ CD SYNC button !™ STEREO/MONO button !£ VOLUME !¢ REPEAT/MEMORY button !∞ ‚ + button !§ DECK B

!§

!¶!•

!¶ JOG DIAL !• π (STOP) button !ª DECK A @º º – button @¡ DBFB button @™ SURROUND button @£ FILE SELECT button @¢ DISPLAY/DEMO button @∞ EDIT/DIRECTION button @§ PLAY MODE button @¶ FUNCTION @• ª (TAPE A) button @ª I/u (POWER) button #º · (TAPE A) button #¡ ª (TAPE B) button

— 4 —

SECTION 2

DISASSEMBLY

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

2-1. UPPER COVER AND CD DOOR

CD door

Three screws

claws

Upper cover

Seven screw

Three srews

2-2. FRONT PANEL

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

Flat type wire

(CN09)

Front panel

Three screws

— 5 —

Connector

(CN302)

Flat type wir

(CN09)

2-3. MAIN BOARD

MAIN board

Harness (CN08)

Harness (CN302)

Harness (CN701)

Five screws

2-4. AMP BOARD

AMP board

Three screws

Two screws

Three screws

— 6 —

Three screws

2-5. CD TRA Y

Bracket

Screw

CD tray

Bracket

(CN06)

Screw

Flat type wir

2-6. CD DECODER BOARD

CD decoder board

claws

Two screws

Flat cable

Connector

Flat cable

— 7 —

Two screws

2-7. BASE UNIT

UD-Cam

Screw

UD-gear

Spring

2-8. CASSETTE DOOR

Spring

Base unit

Spring

Two screws

— 8 —

Cassette door (Note: Four claws are used.)

SECTION 3

MECHANICAL ADJUSTMENTS

SECTION 4

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 damagnetizer.

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

test tape P-4-A100 (10kHz, –10dB)

Signal

10 kHz, –10 dB

3 kHz, 0 dB

SPEAKER terminal (JK301)

Used for

Azimuth Adjustment

Tape Speed Adjustment

level meter

set

+ –

— 9 —

2. T urn 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

R-CH peak

output level

within 2dB

L-CH peak

R-CH peak

within 2dB

screw position

3. Mode: Playback

test tape P-4-A100 (10kHz, –10dB)

SPEAKER terminal (JK301) (L-CH)

oscilloscope

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

Adjustment Location:

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

Tape Speed Adjustment (Deck A)

Procedure:

1. Mode: Playback

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

set

frequency counter

+ –

set

SPEAKER terminal (JK301) (R-CH)

Waveform of oscilloscope

in phase 45˚ 90˚ 135˚ 180˚

good

wrong

SPEAKER terminal (JK301)

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

Adjustment Location: DECK board

Sample Value of Wow and flutter

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

[DECK BOARD] — Component side —

Tape Speed

CN501

SFR501

— 10 —

TUNER SECTION 0 dB=1µV

MW T uning Voltage Adjustment

Main board

TP1

F G VT

DC voltmeter

+ –

Procedure:

1. Set the reception frequency of the unit to 531 kHz.

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

3. Set the reception frequency of the unit to 1,602 kHz.

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

8.0 ± 0.5 V.

Adjustment Location: MAIN board (See page 12)

AM Trac king Adjustment

loop antenna

AM RF SSG

30% amplitude modulation by 400 Hz signal

60 cm

Field strength dB (

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

loop antenna (Supplied accessories)

set

AM ANTENNA terminal (JK101)

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.

5. Adjust CT102 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 12)

— 11 —

FM Tuned Level Adjustment

FM RF SSG

Ω

coaxial

set

Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz

Output level : 28 dB (at 75

deviation (100%)

Ω

open)

FM ANTENNA terminal (JK101)

Procedure:

1. Supply a 28 dB 98 MHz signal from the ANTENNA 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 —

FM Tyned Level

SFR101

IC103

TP1

IC102

MW Tuning Voltage

L105

IC101

CT102

AM Tracking

L104

JK101

— 12 —

JK301

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

5. Adjust the focus bias adjustment when optical block is replaced.

Focus Bias Adjustment

CD DECODER board

CN12

FEO

Procedure:

1. Connect DC voltmeter to test point CN12 (FEO), (VC) on CD DECODER board.

2. T urned Power switch on.

3. Put disc (YEDS-18) in and stop.

4. Adjust VR01 so that the DC voltmeter reading is 0 ± 20 mV.

DC voltmeter

+ –

RF Level Check

CD DECODER board

TP (RF) CN12 (VC)

oscilloscope

Procedure :

1. Connect oscilloscope to test point TP (RF) on CD DECODER board.

2. T urned Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

Note: Clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

VOLT/DIV: 200 mV TIME/DIV: 500 nS

level: 1.0 Vp-p

+0.3 –0.2

Adjustment Location: CD DECODER board

Focus Gain Adjustment (VR02)

This gain has a margin, so even if it is slightly off. There is no problem. Therefore, do not perform this adjustment. Please note that it should be fixed to mechanical center position when you moved and do not know original position.

Adjustment Location

[CD DECODER BOARD] — Component side —

Focus Gain

VR02

IC03

VR01

R07

CN12

IC01

RF Level

Focus Bias

— 13 —

+ 29 hidden pages