Sony HCDRXD-2 Service manual

HCD-RXD2

SERVICE MANUAL

HCD-RXD2 is the tuner , deck, CD and amplifier section in MHC-RXD2.

Model Name Using Similar Mechanism HCD-G101

SECTION

T APE

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-FF

US Model

SPECIFICATIONS

MINI Hi-Fi COMPONENT SYSTEM

MICROFILM

SAFETY CHECK-OUT

CAUTION

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

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.

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

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

1.5 k

Ω

Earth Ground

Voltmeter (0.75 V)

— 2 —

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.

TABLE OF CONTENTS

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

2. DISASSEMBLY

2-1. CD Door ············································································· 5 2-2. CD Mechanism Deck ························································· 6 2-3. Front Panel ········································································· 6 2-4. Main Board·········································································7 2-5. Front Board········································································· 7 2-6. CD Tray ··············································································8 2-7. CD Decord Board ·······························································8 2-8. Base Unit ············································································ 9 2-9. Cassette Lid (L) / (R)·························································· 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

• Tuner, CD Section ························································· 17

• Main Section·································································· 19

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

7. EXPLODED VIEWS

7-1. Cabinet Section································································· 47 7-2. Front Panel Section ·························································· 48 7-3. CD Mechanism Deck Section-1 ······································· 49 7-4. CD Mechanism Deck Section-2 ······································· 50 7-5. Base Unit Section (KSM-213ECM)·································51

8. ELECTRICAL PARTS LIST ······································· 52

— 3 —

SECTION 1

GENERAL

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6789!º !¡ !™

!£

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!∞

!§ !¶

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@§ @∞ @¢ @£

1 1/u (Power) button 2 TIMER SELECT button 3 CLOCK/TIMER button 4 T APE A ( button and indicator 5 –, 0 button 6 TAPE B ( button and indicator 7 = button 8 CD, ^ button and indicator 9 + button !º p button !¡ +, ) button !™ TUNER/BAND button !£ DISPLAY/DEMO button !¢ FUNCTION button !∞ PAUSE button and indicator !§ CD SYNC button

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

— 4 —

SECTION 2

DISASSEMBLY

SET

CD DOOR (Page 5)

CASSETTE LID (L)/(R) (Page 9)

CD MECHANISM DECK (Page 6)

FRONT PANEL (Page 6)

CD TRA Y (Page 8)

CD DECORD BOARD (Page 8)

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

2-1. CD DOOR

CD door

Two claws

MAIN BOARD (Page 7)

BASE UNIT (Page 9)

FRONT BOAR (Page 7)

Pull out the CD tray and remove the CD door

with releasing claws into the direction of arrow.

— 5 —

)

2-2. CD MECHANISM DECK

Screw (+PTPWH 3 × 10)

CD mechanism deck

Flat type wire (CN09)

Two screws (+BVTP 3 × 10)

Screw (+PTPWH 3 × 10)

Harness (CN301

2-3. FRONT PANEL

!º

Front panel

Screw

(+PTPWH 3

Connector (CN701)

10)

Screw (+BVTP 3 × 10)

HOW TO SET THE POWER CORD

Screw (+BVTP 3 × 10)

Two screws (+BVTP 3 × 10)

T wo screws

(+BVTP 3

Screw (+PTPWH 3 × 10)

10)

T wo screws

(+BVTP 3

10)

power cord

— 6 —

)

2-4. MAIN BOARD

Flat type wire (CN251)

Harness (CN502)

Connector (CN203)

Connector (CN201)

Connector (CN202)

T wo screws

(+KTP 3

MAIN boar

Nylon rivet

2-5. FRONT BOARD

!£

the two claws)

Lens (Release

Button

(Release the two claws)

Button (Release the three claws)

!™

Button (Release the three claws)

Harness

(CN603)

Front board

Five screws (BVTP3 × 10)

Button

!º

Button

(Release the claw)

(Release the two claws)

Seven screws

(BVTP3

Button

(Release the two claws

10)

!¡

Button

(Release the three claws)

Button

— 7 —

2-6. CD TRAY

Bracket

Screw (+P 2.6 × 4)

CD tray

Bracket

Flat type wire

(CN06)

Screw (+P 2.6 × 4)

2-7. CD DECORD BOARD

CD decord board

T wo screw

(+BVTP 3

Sheet

Claw

10)

Two screws (+BVTP 3 × 10)

Flat type wire (CN06)

Flat type wire (CN01)

Connector (CN05)

!º

Connector (CN03)

Two claws

Belt

— 8 —

Two screws (+BVTP 3 × 10)

)

2-8. BASE UNIT

UD-cam

Screw (+PTPWH 2.6 × 8)

Screw (+PTPWH 3 × 8)

UD-gear

Spring

2-9. CASSETTE LID (L) / (R)

Spring

Base unit

Remove the cassette lids in the direction of arrow.

Spring

Two screws (+KTP 3 × 8

Four claws

— 9 —

SECTION 3

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 PLA Y 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

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

set

within 2dB

L-CH peak

SPEAKER terminal (JK501)

R-CH peak

level meter

within 2dB

screw position

— 11 —

3. Mode: Playback

Tape Speed Adjustment (Deck A)

test tape P-4-A100 (10kHz, –10dB)

in phase 45˚ 90˚ 135˚ 180˚

SPEAKER terminal (JK501) (L-CH)

SPEAKER terminal (JK501) (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 (JK501)

frequency counte

+ –

2. Adjust the SFR251 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

CN251

SFR251

— 12 —

TUNER SECTION 0 dB=1µV

AM T uning Voltage Adjustment

Main board

TP1

G VT

DC voltmete

–

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

loop antenna

AM RF SSG

loop antenna (Supplied accessories)

set

30% amplitude modulation by 400 Hz signal

Field strength dB (

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.

60 cm

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

AM ANTENNA terminal (TM1)

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)

— 13 —

FM Tuned Level Adjustment

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

AM T rac king

TC102

TP1

SFR101

L105

FM T uned Level

AM T uning Voltage

— 14 —

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.

RF Level Check

CD DECODER board

TP (RF) TP (VC)

oscilloscope

Procedure :

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

2. Turned 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 m TIME/DIV: 500 nS

level: 1.0 Vp-p

+0.3 –0.2

Adjustment Location:

[CD DECODER BOARD] — Component side —

IC702

J778

TP (VC)

IC701

J789

CN701

(RF)

— 15 —

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