sony HCD-D670AV, HCD-N555AV Service Manual

HCD-D670AV/N555AV

SERVICE MANUAL

HCD-D670AV, HCD-N555AV are the tuner, deck, CD and amplifier section in LBT-D670A V , LBT -N555A V.

* Manufactured under license from Dolby Laboratories

Licensing Corporation. DOLBY, the double-D symbol a and “PRO LOGIC” are trademarks of Dolby Laboratories Licensing Corporation.

* Dolby noise reduction manufactured under license from

Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.

Photo: HCD-N555AV

SECTION

T APE

DECK

SECTION

US Model

Canadian Model

HCD-D670AV

AEP Model

UK Model

E Model

Australian Model

PX Model

HCD-N555AV

Model Name Using Similar Mechanism NEW CD Mechanism type CDM37-5BD19 Base Unit Type BU-5BD19 Optical Pick-up type KSS-213BA/S-N Model Name Using Similar Mechanism HCD-N350 T ape Transport Mechanism Type TCM-220WR2E

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS (US model)

POWER OUTPUT AND T OTAL HARMONIC DISTORTION: W ith 6 ohm loads, both channels driven, from 70-20,000 Hz; rated 50 watts per channel minimum RMS power, with no more than 0.9 % total harmonic distortion from 250 milliwatts to rated output (FRONT SPEAKER).

CD player section

System compact disc

digital audio system

Laser Semiconductor laser

(λ=780nm) Emission duration: continuous

laser output Max 44.6 µW* * This output is the value measured at a distance of 200 mm from the objuctive

lens surface on the Optical Pick-up Block with 7 mm aperture.

Frequency response 2 Hz-20 kHz (± 0.5 dB) wavelength 780-790 nm

T uner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

87.5-108.0 MHz (100 kHz step for US, Canadian models) (50 kHz step for except US, Canadian models)

Antenna FM wire antenna Aerial terminals 75 ohm unbalanced Intermediate frequency

10.7 MHz

AM tuner section

Tuning range US, Canadian models:

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

531-1,710 kHz (with the tuning interval se at 9 kHz)

German and Italian models:

AM: 531-1,602 kHz

AEP, UK models:

MW: 531-1,602 kHz LW: 153-279 kHz (with the tuning inteval set at 3 kHz)

Other models:

AM: 531-1,602 kHz (with the AM tuning interval set at 9 kHz)

530-1,710 kHz (with the AM tuning interv al set at 10 kHz)

Antenna AM loop Antenna

External Antenna terminals

Intermediate frequency

450 kHz

– Continued on next page –

COMPACT DISC DECK RECEIVER

MICROFILM

— 1 —

Tape player section

Recording system

4-track 2-channel stereo

Frequency response

(DOLBY NR OFF) 40-13,000 Hz (±3 dB), using SONY TYPE I cassette 40-14,000 Hz (±3 dB), using SONY TYPE II cassette

Wow and flutter

± 0.15% W.Peak (IEC)

0.1% W .RMS (NAB) ± 0.2% W.Peak (DIN)

Amplifier section

US, Canadian models: Continuous RMS power output:

FRONT SPEAKER: 60 W + 60 W (6 ohms at 1 kHz, 5% THD) CENTER SPEAKER: 50 W (8 ohms at 1 kHz, 5% THD) REAR SPEAKER: 25 W + 25 W (16 ohms at 1 kHz, 5% THD)

AEP, UK, German, Italian models: DIN power output:

FRONT SPEAKER: 40 W + 40 W(6 ohms at 1 kHz) SUPER WOOFER: 40 W + 40 W (6 ohms) SURROUND SPEAKER CENTER: 35 W (8 ohms at 1 kHz) SURROUND SPEAKER REAR:

17.5 W + 17.5 W (16 ohms at 1 kHz)

Continuous RMS power output:

FRONT SPEAKER: 50 W + 50 W (6 ohms at 1 kHz, 10% THD) SUPER WOOFER: 50 W + 50 W (6 ohms, 10% THD) SURROUND SPEAKER CENTER: 42 W (8 ohms at 1 kHz, 10% THD) SURROUND SPEAKER REAR: 21 W + 21 W (16 ohms at 1 kHz, 10% THD)

Music power output:

FRONT SPEAKER: 80 W + 80 W (6 ohms at 1 kHz, 10% THD) SUPER WOOFER: 80 W + 80 W (6 ohms, 10% THD) SURROUND SPEAKER CENTER: 70 W (8 ohms at 1 kHz, 10% THD) SURROUND SPEAKER REAR: 35 W + 35 W(16 ohms at 1 kHz, 10% THD)

Other models:

Peak music power output:

1,400 W (6 Ω at 1 kHz, 10% THD)

Continuous RMS power output:

FRONT SPEAKER 45 W + 45 W (6 ohms, at 1 kHz, 5% THD) SUPER WOOFER 45 W + 45 W (6 ohms, 5% THD) SURROUND CENTER SPEAKER 40 W (8 ohms, at 1kHz 5% THD) SURROUND REAR SPEAKER 20 W + 20 W (16 ohms, at 1 kHz, 5% THD)

Inputs PHONO (phono jack):

Sensitivity 3 mV, impedance 47 kilohms

VIDEO (AUDIO) (phono jack):

Sensitivity 250 mV, impedance 47 kilohms

MIC (phone jack): (E, Australian, Mexican, PX, Aregentine models)

Sensitivity 1 mV, impedance 10 kilohms

Outputs PHONES (phone jack):

US, Canadian, AEP, UK, German, Italian models: accept headphones of 8 ohms or more

Other models: accept headphones of 6 to 16 ohms FRONT SPEAKER: accept impedance of 6 to 16 ohms SURROUND SPEAKER REAR:

accept impedance of 16 ohms SURROUND SPEAKER CENTER:

AEP, UK, German,Italian models:

accept impedance of 8 ohms

E, Australian, PX, Argentine, Mexican models:

accept impedance of 8 to 16 ohms SUPER WOOFER:

AEP, UK, German, Italian models:

accept impedance of 16 ohms

E, Australian, PX, Argentine, Mexican models:

accept impedance of 6 to 16 ohms

General

Power requirements

AEP, UK, German, Italian, models:

220-230 V AC, 50/60 Hz

Australian model:

240 V AC, 50/60 Hz

US,Canadian, Mexican model:

120 V AC, 60 Hz

Other models:

110-120 V or 220-240 V AC

adjustable, 50/60 Hz

Power consumption

US model:170 W Canadian model:190 W AEP, UK, German, Italian models:250 W Other models: 240W

Dimensions

Approx. 355 x 425 x 400 mm (14 x 16 3/4 x15 3/4 inches) (w/h/d) incl. projecting parts and controls

Mass

US, Canadian models:

Approx. 12.4 kg (27 lb 6 oz)

Except US, Canadian models:

Approx. 13 kg (28 lb11 oz)

Disegn and specifications subject to change withoutnotice.

— 2 —

MODEL IDENTIFICATION

– BACK PANEL –

Parts No.

MODEL

D670AV: US model D670AV: Canadian model N555AV : AEP model N555AV: German model N555AV: Italian model N555AV: UK model N555AV: E model N555AV : Argentine model N555AV : Australian model N555AV: PX model N555AV: Mexican model

NOTE: The AEP model has lndonsian and Malaysia products. The contents of both products are completely the same.

PARTS No.

4-978-193-0π 4-978-193-1π 4-978-193-2π 4-978-193-3π 4-978-193-4π 4-978-193-5π 4-978-194-0π 4-978-194-1π 4-978-194-2π 4-978-194-3π 4-978-194-4π

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.

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.

This caution label is located inside the unit.

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 IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLA CER CES COMPOSANTS QUE P AR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

— 3 —

SAFETY CHECK-OUT

SERVICING NOTE

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 AC leakage. Check leakage as described below.

LEAKAGE

The AC leakage 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 microampers). 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. Follow 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 V OM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passi ve VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

0.15µF

1.5k

Ω

Earth Ground

AC voltmeter (0.75V)

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

NOTES ON HANDING 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 objecti ve lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

[FL Display Tube, LED All Lit and Key Check mode]

When the TUNER/BAND , DISPLAY/DEMO , and FILE 2 buttons are pressed simultaneously, the FL display tube and LEDs will all light up. Press any button to enter the key check mode. When the key check mode is entered, the FL display tube displays “K 1 J0 V0”. Each time a button is pressed, the counter increases in the following order, K 2 n K 3 n K 4. If buttons already pressed once are pressed again, the counter will not increase. When the VOLUME knob is rotated in the + direction, the count increases in the following order. V1 n V2 n V3. When rotated in the – direction, it decreases in the following order. V0 n V9 n V8. When the AMS dial is rotated in the clockwise direction, the count increases in the following order. J1 n J2 n J3. When rotated in the counterclockwise direction, it decreases in the following order. J0 n J9 n J8. To exit form the test mode, press the TUNER/BAND , DISPLAY/ DEMO , FILE 2 buttons simultaneously again.

[Switching the channel step 9 KHz/10 KHz]

Press ENTER/NEXT button and POWER button simultaneously to switch the AM channel step 9 kHz and 10 kHz. Be sure not to change with carelessness.

— 4 —

TABLE OF CONTEMTS

Section Title Page

SECTION 1. GENERAL ...................................................... 6

SECTION 2. DISASSEMBLY

2-1. Front Panel Assy and Main Board ......................................... 8

2-2. TC Mechanism Deck ............................................................. 8

2-3. CD Mechanism Deck ............................................................. 9

2-4. BU Bracket Assy.................................................................... 9

2-5. Disc Table ............................................................................ 10

SECTION 3. MECHANICAL ADJUSTMENTS......... 11

SECTION 4. ELECTRICAL ADJUSTMENTS

DECK Section ............................................................................. 11

TUNER Section........................................................................... 14

CD Section................................................................................... 15

SECTION 5. DIAGRAMS

5-1. Circuit boards location ........................................................ 17

5-2. IC Pin Functions .................................................................. 18

• IC501 Graphic Control (ASD0204) .................................. 18

• IC701 Master Control (TMP87CS64YF) .......................... 19

5-3. Block Diagrams

• Main Section...................................................................... 22

• Tuner Section

(US, CND, E, AUS, MX, PX, AR Model)......................... 25

• Tuner Section

(AEP, UK, G, IT Model) .................................................... 27

• DECK Section ................................................................... 29

• CD Section......................................................................... 31

5-4. Schematic Diagram — Tuner Section —

(US, CND, E, AUS, MX, PX, AR Model)........................... 34

5-5. Printed Wiring Board — Tuner Section —

(US, CND, E, AUS, MX, PX, AR Model)........................... 36

5-6. Schematic Diagram — Tuner Section —

(AEP, UK, G, IT Model) ..................................................... 38

5-7. Printed Wiring Board — Tuner Section —

(AEP, UK, G, IT Model) ..................................................... 40

5-8. Schematic Diagram — CD Panel Section — ...................... 41

5-9. Printed Wiring Board — CD Panel Section —.................... 42

5-10. Schematic Diagram — CD Section — .............................. 45

5-11. Printed Wiring Board — CD Section —............................ 47

5-12. Printed Wiring Board — Deck Section — ......................... 49

5-13. Schematic Diagram — Deck Section —............................ 51

5-14. Printed Wiring Board — Main Section —......................... 57

5-15. Schematic Diagram — Main Section —............................ 59

5-16. Schematic Diagram — Panel Section — ........................... 64

5-17. Printed Wiring Board — Panel Section — ........................ 69

5-18. Printed Wiring Board — Power Section — ....................... 73

5-19. Schematic Diagram — Power Section —.......................... 77

5-20. Schematic Diagram — CD Motor Section — ................... 80

5-21. Printed Wiring Board — CD Motor Section —................. 81

5-22. IC Block Diagrams — CD Section — ............................... 83

Section Title Page

SECTION 6. EXPLODED VIEWS

6-1. Case and Back Panel Section ............................................... 85

6-2. Panel Board Section ............................................................. 86

6-3. Front panel Section .............................................................. 87

6-4. Chassis Section .................................................................... 88

6-5. TC Mechanism Section 1 (TCM-220WR2E) ...................... 89

6-6. TC Mechanism Section 2 (TCM-220WR2E) ...................... 90

6-7. TC Mechanism Section 3 (TCM-220WR2E) ...................... 91

6-8. CD Mechanism Section(CDM37-5BD19)........................... 92

6-9. Base Unit Section (BU-5BD19)........................................... 93

SECTION 7. ELECTRICAL PARTS LIST ................... 94

• Abbreviation G : German model IT : Italian model MX : Mexican model AUS: Australian model AR : Argentine model

— 5 —

SECTION 1

GENERAL

FM 75Ω COAXIAL terminal

This section is extracted from instruction manual.

DOLBY NR button

Note:

*1 : AEP, UK, German, Italian models. *2 : Except US, Canadian models. *3 : E, Australian, Mexican, PX,

Argentine models

*4 : US, Canadian, AEP, UK,

German, Italian models.

*5 : Except AEP, UK, German,

Italian models.

*6 : E, PX, Argentine models.

KARAOKE PON/MPX button

— 6 —

DOLBY NR B indication

— 7 —

SECTION 2

DISASSEMBLY

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

2-1. FRONT PANEL ASSY AND MAIN BOARD

Remove the connectors.

• Main board (six connectors)

• Main power amplifier board (one connector)

Screw (BVTP3 X 8)

Two earth wire

CN1301

Screw (BVTP 3x8)

Front panel assy

Three screws

(BVTP 3X8)

2-2. TC MECHANISM DECK

Button (eject-L)

Power amp board

CN402

CN401

CN701

Three screws

(BVTP 2.6X8)

CN203

CN201

CN250

Main board

TC mechanism deck

Four screws

(BVTP 2.6X8)

Two scrws

(BVTP 3X8)

Remove the two cassette lids

direction of arrow.

— 8 —

Button (eject-R)

Push the eject button.

2-3. CD MECHANISM DECK

Two screws

(BVTP 3X8)

Screw (BVTP 3X8)

Two screws

(BVTP 3X8)

CD mechanism deck

2-4. BU BRACKET ASSY

BU bracket assy

Yoke bracket

— 9 —

2-5. DISC TABLE

Bracket (BU)

Screw (BVTP 3X8)

Bracket (BU)

Step screw

Disc table

— 10 —

SECTION 3

MECHANICAL ADJUSTMENTS

SECTION 4

ELECTRICAL ADJUSTMENTS

PRECAUTION

1. Clean the following parts with a denatured alcohol-moistened swab :

record/playback heads 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. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Torque

FWD

FWD back tension

REV

REV back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

36 to 61g • cm

(0.5–0.84 oz • inch)

2 to 6g • cm

(0.02–0.08 oz • inch)

36 to 61g • cm

(0.5–0.84 oz • inch)

2 to 6g • cm

(0.02–0.08 oz • inch)

61 to 143g • cm

(0.85–1.99 oz • inch)

100g or more

(3.53 oz or more)

100g or more

(3.53 oz or more)

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 adjustmetns 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 R-ch.

7. Switches and controls should be set as follows unless otherwise specified. DOLBY NR switch : OFF (US, CND, AEP, UK, G, IT model)

Tape

P-4-A100

WS-48B

P-4-L300

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note : Perform this adjustments for both decks.

Procedure :

1. Mode : Playback (FWD)

Signal

10 kHz, –10 dB

3 kHz, 0 dB

315 Hz, 0 dB

Used for

Azimuth Adjustment

Tape Speed Adjustment

Level Adjustment

test tape P-4-A100 (10kHz, –10dB)

• Abbreviation

CND : Canadian model. G : German model. IT : Italian model.

set

main board CN403

(L-CH)

Pin Pin 1 (R-CH)

main board CN403 Pin

level meter

— 11 —

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 1 dB of peak.

L-CH peak

screw position

R-CH peak

output level

within 1dB

L-CH peak

R-CH peak

within 1dB

screw position

3. Mode : Playback (FWD)

test tape P-4-A100 (10kHz, –10dB)

set

main board CN403 Pin

oscilloscope

Tape Speed Adjustment DECK A

NOTE : Start the tape speed adjustment as bellow after setting the

test mode.The tape speed can be changed with the HIGH SPEED DUBBING button during the test mode.

Method :

1. Turn the power switch on.

2. Press the DISPLAY/DEMO button, MENU 1 button and TUNER/ BAND button simulateously.

Procedure :

Mode : Playback (FWD)

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

set

main board CN403 (Pin 3 : L-CH)

frequency counter

(Pin 1 : R-CH)

1. Insert tha WS-48B into the deck A to playback.

2. Press the HIGH SPEED DUBBING button. Then at HIGH SPEED mode.

3. Adjust RV652 on the MD board so that the frequency counter reading becomes 6,000 ± 30 Hz.

4. Press the HIGH SPEED DUBBING button again to be set the NORMAL SPEED mode.

5. Set to the playback mode.

6. Adjust RV651 on the MD board so that the frequency counter reading becomes 3,000 ± 15 Hz.

Waveform of oscilloscope

in phase

good

135

180

wrong

4. Repeat steps 1 to 3 in playback (REV) mode.

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

Adjustment Location : Record/Playback Head (Deck A and B)

FWD side

Adjustment screw

REV side

Frequency difference between deck A and deck B the beginning of the tape should be within ± 1.5%. Adjustment Location : MD board

Playback Level Adjustment DECK A DECK B

Procedure :

Mode : Playback (FWD)

test tape P-4-L300 (315Hz, 0dB)

set

main board CN403 (Pin

(Pin 1 : R-CH)

: L-CH)

level meter

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (LCH) and RV401 (R-CH) so that adjustment within the following adjustment level.

Adjustment level :

CN403 PB level : 301.5 to 338.3 mV (–8.2 to –7.2 dB) level difference between the channels : within ± 0.5 dB

Adjustment Location : MD board

— 12 —

Record Bias Current Adjustment DECK B

2. Mode : Playback

Procedure :

1. Mode : record

VIDEO IN

AF OSC

attenuator

600

1) 315Hz

2) 10kHz

Ω

50mV (–23.8dB)

blank tape CS-123

set

2. Mode : Playback

recorded position

set

CN 403 (Pin

(Pin 1 : R-CH)

level meter

: L-CH)

Confirm playback the signal recorded in step 1 become adjustment level as follows. If these levels do not adjustment level, adjust the RV341 (L-CH) and RV441 (R-CH) on the MD board to repeat step 1 and 2.

recorded position

set

main board CN403 (Pin

(Pin 1 : R-CH)

level meter

: L-CH)

Confirm playback the signal recorded in step 1 become adjustment level as follows. If these levels do not adjustment level, adjust the RV301 (L-CH) and RV351 (R-CH) on the main board to repeat steps 1 and 2.

Adjustment level: CN 403 PB level: 47.2 to 53.0 mV

(–24.3 to –23.3 dB)

Adjustment Location : main board

Adjustment Location [MAIN BOARD] (Component Side)

1 3

CN403

RV351 REC LEVEL (R-CH)

RV301 REC LEVEL (L-CH)

Adjustment level : The playback output of 10 kHz level difference

against 315Hz reference should be ± 0.5 dB

Adjustment Location : MD board

Record Level Adjustment DECK B

Procedure :

1. Mode : record

VIDEO IN 315Hz, 50mV (–23.8dB)

AF OSC

attenuator

600

Ω

set

blank tape CS-123

[MD BOARD] (Conductor Side)

RECORD

BIAS

RV301 RV401¬R

PB LEVEL

– DECK B –

RV441

RV341

TAPE SPEED

(NORMAL)

RV651

LEVEL

– DECK A –

(HIGH) RV652

— 13 —

TUNER SECTION 0dB=1µV

Note : As a front-end (FE1) is difficult to repair if faulty, replace it

with new one.

AM Tuned Level Adjustment

Note : FM Tuned Level adjustment should be performed after this

AM Tuned Level adjustment.

• Abbreviation G : German model IT : Italian model

Setting :

Band : AM or MW

AM RF SSG

30% amplitude modulation by 400 Hz signal

Carrier frequency : 999kHz (at 9kHz step)

1050kHz (at 10 kHz step)

loop antenna

Procedure :

1. Set the output of SGG so that the input level of the set becomes 55 dB.

2. Tune the set to 999 kHz or 1050 kHz .

3. Adjust RV41 (AEP, UK, IT, G models), RV42 (other models) to the point (moment) when the TUNED indicator will change from going off to going on.

Adjustment Location : TCB board

FM Tuned Level Adjustment

Note : This adjustment should be performed after the AM Tuned

Level Adjustement.

loop antenna (Supplied accessories)

60 cm

Field strength dB (

V/m)=SGG output level dB (µV/m)–26dB.

Adjustment Location

AEP, UK, G, IT model [TCB BOARD] (Component Side)

RV42 FM T uned Level

AM antenna terminal (TM1)

IC41

AM T uned Level

RV41

TM1

Setting :

Band : FM

FM RF stereo signal generator

Ω

coaxial

set

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

Output level : 25dB (at 75

deviation (100%)

Ω

open)

FM ANTENNA terminal (TM1) (75

Ω

)

Procedure :

1. Supply a 25dB 98 MHz signal from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Adjust RV42 (AEP, UK, IT, G models), RV41 (other models) to the point (moment) when the TUNED indicator will change from going off to going on.

Adjustment Location : TCB board

FE1

Other model [TCB BOARD] (Component Side)

IC2

RV41 FM T uned Lev el

FE1

RV42

AM T uned

Level

TM1

— 14 —

CD SECTION

S Curve Check

Note :

1. CD Block is basically designed 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 applicatior 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

oscilloscope (DC range)

BD board

TP(RF) TP(VC)

Procedure :

1. Connect oscilloscope to test point TP (RF). (Ground terminal : VC)

2. Turned Power switch on.

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

4. Adjust RV101 so that the waveform is clear. (Clear RF signal waveform means that the shape “◊ ” can be clearly distinguished at the center of the waveform.)

5. After adjustment, check the RF signal level.

• RF signal VOLT/DIV : 200 mV TIME/DIV : 500 nS

oscilloscope

BD board

TP(FE) TP(VC)

Procedure :

1. Connect oscilloscope to test point TP (FEO).

2. Connect between test point TP (FOK) and Ground by lead wire.

3. Turn Power switch on.

4. Put disc (YEDS-18) in and turned Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And conf irm peak to peak lev el within 2.4 ± 0.7 Vp-p.

S-curve waveform

Symmetry

within 2.4

0.7 Vp-p

6. After check, remove the lead wire connected in step 2.

Note : • Try to measure several times to make sure than the ratio of

A : B or B :A is more than 10 :7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

level

1.3 ± 0.3 Vp-p

RF Level Check

oscilloscope

BD board

TP(RF) TP(VC)

Procedure :

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

2. Turned Power switch on.

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

4. Confirm that osilloscope 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.

RF signal waveform

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

level : 1.3

0.3 Vp-p

— 15 —

E-F Balance Check

Adjustment Location :

oscilloscope

BD board

TP (TEO)

TP (VC)

Procedure :

1. Connect test point TP (ADJ) on Main board to Ground with a lead wire.

2. Connect oscilloscope to test point TP (TEO).

3. Turned Power switch on.

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

5. Confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to 0Vdc, and check this level.

Traverse waveform

level : 300 ± 100 mVp-p

[BD BOARD] (Conductor Side)

RV101

IC101

RV103

IC104

TEO

FEO

RV102

TEI

FEI

GND

[MAIN BOARD] (Conductor Side)

FOK

IC102

PCK

Specified level : • X 100=less than ± 7%

A-B

2(A+B)

• A+B=300 ± 100 mVp-p

6. Remove the lead wire connected in step 1.

Focus/Tracking Gain Adjustment (RV102, RV103)

This gain has a margin, so even if it is slightly off. There is no problem. Therfore, 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.

IC701

TP701 (ADJ)

— 16 —

SECTION 5

DIAGRAMS

5-1. CIRCUIT BOARDS LOCATION

• Abbreviation MX: Mexican model AUS: Australian model AR: Argentine model

HP board

MIC board (E,AUS,MX,PX,AR)

CD LED board

CD (L) board

TC CONTROL board

PANEL board

TRANS board

S. WOOFER board

TCB board

POWER AMP board

MAIN board

DOOR SW board

CD (R) board

Note: rA is including in MD board.

LEAF SWITCH board

TABLE SENSOR board

A MOTOR board

CD JOG board

MD board (including rA)

BD board

CD MOTOR board

LED board

— 17 —

5-2. IC PIN FUNCTIONS

• IC501 GRAPHIC CONTROL (ASD0204)

Pin No.

2 3, 4 5-9

10 11 12 13 14 15 16

17, 18

19 20 21 22 23 24

25 26-29 30-33

42 43-45

47, 48 49, 50

51-53 54-78

79 80-86

87-100

VDD LED8 LDE7, 6 LED5–1 RESET X2 X1 IC (Vpp) XT2 JOG B VDD LED10, 9 KEY SEL VOL B REQ. GM CLK MG DATA GM DATA MG AVSS SPEANA 4–1 KEY 4–1 AVDD AVREF VOL A JOG A RDY MG SIRCS VSS DOR SW LED SELECT LED13–11 VDD LEDS7, 6 LEDS5, 4 LEDS3–1 SEG32–8 V, LOAD SEG7–1 GR14–1

I/OPin Name

+5V

–

LED drive signal output.

Reset signal input.

X’ tal (4 MHz).

GND

–

Not used.

AMS encoder signal input.

+5V

–

LED drive signal output.

Key select control.

Volume encoder signal input.

Request signal from/to master control.

Serial clock input.

Serial data output.

Serial data input.

GND

–

Spectram analizer signal input.

Key matrix input.

–

+5V

–

Volume encoder signal input.

AMS encoder signal input.

Ready signal from master control.

SIRCS signal input.

GND

–

CD door open detection input.

LED select signal output.

LED drive signal output.

+5V

–

Not used.

Not used. (Pull down)

LED drive signal output.

FL segment signal output.

–25V for FL

–

FL segment signal output.

FL grid signal output.

Function

• Abbreviation FL: Fluorescent Indicator Tube GND: Ground

— 18 —

• IC701 MASTER CONTROL (TMP87CS64YF)

Pin No.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Pin Name

VSS XOUT XIN RESET XOUT XIN GND (test) AC CUT SUPER WOOFER ON ST-MUTE ON 180-A-PLAY 180-B-PLAY 180-B-REC V. DET BD-UP (5CD) TRAY CLOSE (1CD) ENCODER-1 ENCODER-2 ENCODER-3 OUT SW OPEN LOAD IN LOAD OUT TBL-L TBL-R SCOR TBL-SENS RDS INT RDS DATA DF LAT SENS XRST MG-RDY ADJ GM-REQ MG-CLK GM-DATA MG-DATA CD-CLK ADJ-2 CD-DATA

I/O

GND

–

X’ tal (10 MHz).

Reset signal input.

X’ tal for clock (32.768 kHz)

GND

–

Back up signal input.

Super woofer ON/OFF control.

Mute signal output for tuner.

Tape detection sigal input. (Connected to GND)

I I

Voltage detection (Not used).

Disc table up detect.

Connected to GND

I I

Input selector control signal output. (Pull up)

I I

Out switch signal input. (Pull up)

Loading motor control signal output. (Not used)

O O

Table motor control signal output.

Sub-code sync signal input.

CD Table sensor signal input.

RDS data start input.

RDS data output.

Latch signal for digital filter.

Table sence signal input.

Reset signal output for CD.

Ready signal to graphic control.

Test mode input.

Request signal from graphic control.

Clock signal to graphic control.

Data input from graphic control.

Data output to graphic control.

Clock output. Serial bus line.

Test mode input.

Data output. Serial bus line.

Function

• Abbreviation FL : Fluorescent Indicator Tube GND : Ground

— 19 —

Pin No.

41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

AUB IN AUB OUT FOCUS SW SQ-CLK SQ-DATA X-LAT TEST VAREF

AV VSS VDD SPEC DESTINATION DISC SENS TC RELAY A-SHUT B-SHUT B-HALF A-HALF 220-A-PLAY 220-B-PLAY 62427 LAT K-CON-LAT VOL LAT (AV) FRONT SP RELAY B REAR SP RELAY C POWER ON CD POWER RPOLOG LAT MUTE COM CLK COM DIN COM DATA K CON ON LIDDED LED MD/VIDEO DBFB-HIGH PWM-OUT PRO-LOGIC TC A

I/OPin Name

Audio bus in/output. (Not used)

Focus switching signal output.

Subcode Q data read clock output.

Subcode Q data input.

Latch signal digital signal processor.

Test land.

Analog reference voltage input.

–

GND

–

+5V

–

Destination detection input.

Not used.

REC/PB select signal output.

I I I

Control signal input form deck.

I I I

PLL latch output.

Not used.

Latch signal for electrical volume. (Not used)

Not used.

Rear speaker relay control output.

Power on signal output

CD power control signal output.

Not used.

Mute signal for AMP.

PLL clock output. (PLL, Function, Graphic Equalizer)

PLL data input. (PLL, Function, Graphic Equalizer)

PLL data output. (PLL, Function, Graphic Equalizer)

Not used.

Disc No. LED drive signal output.

MD/VIDEO select output.

DBFB switching signal output.

Not used.

Dolby pro-logic control ourput.

Deck A, B select output.

Function

— 20 —

Pin No.

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

NORM BIAS OFF REC MUTE NR OFF PB P ASS. AMP/DOLBY LINE MUTE ON CAP. M-HIGH A-TRG B-TRG TRG LOW CAP M ON STEREO TUNED ST-CE DELAY SEL MIC DELAY ON DELAY LEVEL A DELAY LEVEL B V

I/OPin Name

NORMAL/HIGH control signal output.

Bias oscillation output.

Mute output.

Dolby ON/OFF signal output.

REC/PB control signal output.

Dolby switching signal output.

Mute signal output for deck.

Capstan motor control signal output.

O O

Trigger motor control signal output.

Trigger motor high/low control signal output.

Capstan motor ON/OFF control signal output.

Stereo detection signal from tuner.

Tuned detection signal from tuner.

Latch signal output for tuner.

Not used.

ECHO delay ON/OFF control signal output (Not used)

O O

ECHO delay level control signal output (Not used)

+5V

–

Function

— 21 —

+ 54 hidden pages