Sony HCDV808 Service Manual

HCD-V808

SERVICE MANUAL

HCD-V808 is the tuner, deck, Video CD and amplifier section in MHC-V808.

* 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.

CD Section

Tape deck Section

E Model

Chinese Model

Model Name Using Similar Mechanism HCD-V4500 CD Mechanism Type Base Unit Name BU-5BD21AL Optical Pick-up Name Model Name Using Similar Mechanism HCD-H881 Tape Transport Mechanism Type TCM-220WR2

CDM38L-5BD21AL

KSS-213D/Q-NP

SPECIFICATIONS

– Continued on next page –

MICROFILM

MINI Hi-Fi COMPONENT SYSTEM

CAUTION

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

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

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

The following caution label is located inside the unit.

MODEL IDENTIFICATION

– BACK PANEL –

PART No.

MODEL PART NO. Malaysia 4-991-746-3π Saudi Arabia, Thai 4-991-746-8π Singapore 4-991-747-0π Taiwan 4-991-747-1π Chinese 4-991-747-2π Indonesia 4-991-747-3π Hong Kong 4-991-747-5π

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.

– 2 –

TABLE OF CONTENTS

SERVICING NOTES

1. GENERAL

............................................................... 4

2. DISASSEMBLY ...................................................... 7

3. TEST MODE .......................................................... 16

4. MECHANICAL ADJUSTMENTS .................. 19

5. ELECTRICAL ADJUSTMENTS

DECK Section .............................................................. 19

CD Section.................................................................... 22

VIDEO Section............................................................. 23

6. DIAGRAMS

6-1. IC Pin Function Description......................................... 24

6-2. Printed Wiring Board —BD Section— ........................ 33

6-3. Schematic Diagram —BD Section— ........................... 35

6-4. Printed Wiring Boards —CD MOTOR Section— ....... 37

6-5. Schematic Diagram —CD MOTOR Section— ............ 39

6-6. Printed Wiring Boards —VIDEO Section— ................ 42

6-7. Schematic Diagram —VIDEO Section— .................... 45

6-8. Schematic Diagram —DECK Section—...................... 51

6-9. Printed Wiring Boards —DECK Section— ................. 55

6-10. Printed Wiring Boards

—MAIN/DECK/POWER SUPPLY Section— ............ 58

6-11. Schematic Diagram

—MAIN/POWER SUPPLY Section— ........................ 61

6-12. Schematic Diagram —PANEL Section— .................... 66

6-13. Printed Wiring Boards —PANEL Section—................ 71

6-14. Printed Wiring Boards

—POWER AMP/KEY CONTROL Section—............. 75

6-15. Schematic Diagram

—POWER AMP/KEY CONTROL Section—............. 76

7. EXPLODED VIEWS ............................................ 90

8. ELECTRICAL PARTS LIST ............................. 101

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 pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the 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.

– 3 –

SECTION 1

GENERAL

LOCATION OF CONTROLS — Front Panel —

12345 67 890

••

•

!• !ª @º @¡

@™

@£ @¢

@∞ @§

@¶ @•

•

•••

•

#º #¡ #™ #£#¢

@ª

•

1 POWER button 2 DISC SKIP EX-CHANGE button 3 0 button 4 ) button 5 DISC 1 button 6 DISC 2 button 7 DISC 3 button 8 p button 9 § OPEN/CLOSE button 0 · ∏ button !¡ CD disc tray !™ FUNCTION button !£ STEREO/MONO button !¢ TUNING MODE button !∞ TUNER MEMORY button !§ TUNER/BAND button and indicator !¶ VOLUME control knob !• LEVEL + button !ª LEVEL – button

•

!¡

•

!™

!£

!¢ !∞

!§ !¶

@º BEAT SELECT button @¡ BEAT SPEED button @™ BEAT ON/OFF button and indicator @£ DJ MIX LOOP button @¢ DJ MIX FLASH button @∞ PHONES jack @§ MIX MIC jack @¶ MIC LEVEL control knob @• ECHO LEVEL control knob @ª WAVE button #º NON-STOP button and indicator #¡ BPM CONTROL button and indicator #™ GROOVE button and indicator #£ SONIC FORMATION button and indicator #¢ MEMORY button

$¶ $•

$ª %º

%¡ %™

%£

#∞#§#¶ #• #ª $º

•

•••

•

#∞ VCD indicator #§ PBC indicator #¶ AUTO PBC indicator #• LOW FREQUENCY button #ª Fluorescent indicator tube $º HIGH FREQUENCY button $¡ KARAOKE PON/MPX button

•

$¡ $™

$£ $¢

$∞ $§

$™ EFFECT ON/OFF button and indicator $£ MUSIC button $¢ MOVIE button $∞ GAME button $§ P FILE button $¶ TIMER SELECT button $• CLOCK/TIMER SET button $ª SLEEP button %º DISPLAY/DEMO button %¡ DIRECTION button %™ 1/ALL DISCS button %£ PLAY MODE button %¢ ENTER/NEXT button and indicator

%¢

– 4 –

^∞ ^§

^¶ ^•

^ª &º

&¡ &™

%∞%§%¶%•

•

%∞ PREV button %§ NEXT button %¶ RETURN button %• SELECT button %ª Jog dial knob and indicator ^º 0 button (deck B side) ^¡ ) button (deck B side) ^™ · button and indicator (deck B side) ^£ ª button and indicator (deck B side) ^¢ p button (deck B side) ^∞ DJ MIX A PAD button

•

••

•

%ª

^º

•

^¡

^™ ^£

•

^¢

^§ DJ MIX PAD B button ^¶ DJ MIX CHAIN button ^• 0 button (deck A side) ^ª ª button and indicator (deck A side) &º · button and indicator (deck A side) &¡ p button (deck A side) &™ ) button (deck A side) &£ § button (deck A side) &¢ Cassette holder (deck A side) &∞ HIGH SPEED DUBBING button &§ CD SYNCHRO button &¶ r REC button and indicator

•

&• P PAUSE button and indicator &ª Cassette holder (deck B side) *º § button (deck B side)

&£

— Rear Panel —

7 8

•

&¢

&∞&§&¶&• *º

••

&ª

1 FM ANTENNA terminal 2 AM ANTENNA terminal 3 SYSTEM SELECT switch (NTSC/AUTO/

PAL select)

4 VOLTAGE SELECTOR (except Saudi

Arabia, Malaysia, Thai models)

5 CD DIGITAL OUT OPTICAL 6 VIDEO/MD (AUDIO) IN pin jack 7 VIDEO/MD (AUDIO) OUT pin jack 8 SUPER WOOFER output pin jack 9 SURROUND SPEAKER output terminal 0 SPEAKER output terminal !¡ VIDEO OUT pin jack !™ S VIDEO OUT connector

!¡ !™

– 5 –

– 6 –

• This set can be disassembled in the order shown below.

SECTION 2

DISASSEMBLY

CASE

(Page 8)

OPTICAL PICK-UP CLEANING (Page 8)

CD MECHANISM DECK SECTION (CDM38L-5BD21AL) (Page 9)

BASE UNIT (BU-5BD21AL) (Page 9)

BD BOARD (Page 10)

OPTICAL PICK-UP (KSS-213D/Q-NP) (Page 10)

TRAY SECTION (Page 11)

SLED MOTOR (M102) SPINDLE MOTOR (M101) (Page 10)

MAIN BOARD (Page 15)

FRONT PANEL SECTION (Page 12)

TAPE MECHANISM DECK SECTION (TCM-220WR2) (Page 12)

CAPSTAN MOTOR (M1) (Page 13)

BELT (Page 14)

SLIDER (HEAD) ASS’Y (Page 14)

MAGNETIC HEAD (Page 15)

– 7 –

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

CASE

screw (case 3 TP2) (3

10)

two screws (case 3 TP2) (3

three screws (BVTT 3

Remove the case to direction of the arrow.

screw (case 3 TP2) (3

10)

OPTICAL PICK-UP CLEANING

Insert an applicator into a hole of the chucking arm and clean the lens.

In sled servo mode (see page

16), slide the optical pick-up a little in arrow direction.

Note 1: In cleaning the lens, do not apply an excessive force.

As the optical pick-up is vulnerable, application of excessive force could damage the lens holder.

Note 2: In cleaning, do not use a cleaner other than exclusive

cleaning liquid (KK-91 or isopropyl alcohol).

Note 3: Wipe the objective lens spirally from center toward

outside. (See Figure A)

hole

(Figure A)

– 8 –

CD MECHANISM DECK SECTION (CDM38L-5BD21AL)

Turn the cam to direction of the arrow

loading panel

screw (BVTP 3

10)

Removal the CD mechanism deck section (CDM38L-5BD21AL) to direction of the arrow

flat wire (29 core) (CN101)

two screws (BVTP 3

two connectors (CN203, 204)

Pull the tray.

Push the tray.

BASE UNIT (BU-5BD21AL)

two yoke brackets

boss

base unit (BU-5BD21AL)

screw (BVTP 3

10)

– 9 –

BD BOARD

two screws (PTPWH M2.6

two springs

screw (BVTP 2.6

Removal the four solders.

two screws (PTPWH M2.6

optical pick-up section

two springs

flat wire (16 core) (CN102)

BD board

limit switch (S101)

OPTICAL PICK-UP (KSS-213D/Q-NP), SLED MOTOR (M102), SPINDLE MOTOR (M101)

optical pick-up (KSS-213D/Q-NP)

spindle motor (M101)

two screws (P 2

sled shaft

claw

sled motor (M102)

– 10 –

TRAY SECTION

flat wire (8 core) (CN702)

claw

flat wire

two claws

Pull the tray.

Removal the tray.

Note: When installing the tra y, take care so that the collars A and B

are properly inserted into the slots.

Note: When installing the tray, pull around the flat wire

to pass through the claw A and claw B, as shown in the figure.

Turn the cam to direction of the arrow.

– 11 –

slots

collar

FRONT PANEL SECTION

loading panel

screw

(BVTP 3

Pull the tray

front panel section

10)

two claws

screw (BVTP 3

10)

Turn the cam to direction of the arrow

five screws (BVTT 3

flat wire (21 core) (CN205)

flat wire (17 core) (CN102)

flat wire (11 core) (CN206)

TAPE MECHANISM DECK SECTION (TCM-220WR2)

tape mechanism deck section (TCM-220WR2)

Open the cassette lids.

three screws (BVTP 2.6

Push the two buttons.

– 12 –

CAPSTAN MOTOR (M1)

Removal the AUDIO board to direction of the arrow

four screws (BTP 2.6

connector (CN651)

Removal the capstan motor (M1) to direction of the arrow

Break the soldering of motor lead.

claw

two screws (BTP 2.6

Hang the two belts.

– 13 –

BELT

belt (FR)

capstan motor

belt B

belt (FR)

belt A

SLIDER (HEAD) ASS’Y

pinch lever (REV) ass’y

pinch lever (FWD) ass’y

tension spring

claw

two clips

Break the soldering of flexible flat cables.

– 14 –

MAGNETIC HEAD

azimuth adjustment spring

two azimuth adjustment screws

magnetic head

Removal the slider (REV slider) to direction of the arrow.

two screws (P 2

tension spring (1)

MAIN BOARD

connector (CN901)

two screws (BVTP 3

four screws (BVTP 3

two connectors (CN105, 106)

flat wire (15 core) (CN201)

flat wire (13 core) (CN202)

IC201

MAIN board

– 15 –

connector (CN101)

SECTION 3

TEST MODE

MC COLD RESET

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1. Press three buttons NEXT , ENTER/NEXT , and DISC 1 si-

multaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

CD DELIVERY MODE

• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press POWER button to turn the set ON.

2. Press DIRECTION button and POWER button simulta-

neously.

3. A message “LOCK” is displayed on the fluorescent indicator

tube, and the CD delivery mode is set.

MC HOT RESET

• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.

Procedure:

1. Press three buttons NEXT , ENTER/NEXT , and DISC 2 si-

multaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

SLED SERVO MODE

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1. Select the function “CD”.

2. Press three buttons NEXT , ENTER/NEXT , and

FUNCTION simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the

fluorescent indicator tube.

4. With the CD in stop status, press ) button in CD section to

move the pick-up to outside track, or 0 button to inside track.

5. To exit from this mode, perform as follows:

1) Move the pick-up to the most inside track.

2) Press three buttons in the same manner as step 2.

Note:

• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively , otherwise the gear can be chipped.

CHANGE-OVER OF FUNCTION NAME

• The FUNCTION name of external input terminal can be changed over to “VIDEO” or “MD”.

Procedure:

1. Press POWER button to turn the set OFF.

2. Press POWER button together with FUNCTION button, and

the power is turned on, the display of fluorescent indicator tube changes to “MD” or “VIDEO” instantaneously, and thus the FUNCTION is changed over. It is set to “VIDEO” at shipment.

CHANGE-OVER OF AM TUNER STEP BETWEEN 9 kHz AND 10 kHz

• A step of AM channels can be changed over between 9 kHz and 10 kHz.

Procedure:

1. Press POWER button to turn the set ON.

2. Select the function “TUNER”, and press TUNER/BAND

button to select the BAND “MW”.

3. Press POWER button to turn the set OFF.

4. Press ENTER/NEXT and POWER buttons simultaneously,

and the display of fluorescent indicator tube changes to “MW 9 k STEP” or “MW 10 k STEP”, and thus the channel step is changed over. Be sure not to change with carelessness.

LED AND FLUORESCENT INDICA TOR TUBE ALL LIT, KEY CHECK MODE

Procedure:

1. Press three buttons NEXT , ENTER/NEXT , and DISC 3 si-

multaneously.

2. LEDs and fluorescent indicator tube are all turned on.

Press DISC 2 button, and the key check mode is activated.

3. In the key check mode, the fluorescent indicator tube displays

“K 1 J0 V0”. Each time a button is pressed , “K”value increases. However, once a button is pressed, it is no longer taken into account. “J” value increases like 1, 2, 3 ... if rotating JOG dial knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction. “V” value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction.

4. To exit from this mode, press three b uttons in the same manner

as step 1, or disconnect the power cord.

SELF-DIAGNOSIS

This model has the self-diagnosis function for the video and audio decoder sections. Immediately after the power on, the self-diagnosis function searches each operation of IC’s around the mechanism controller (IC701). The LED (D701) on the VIDEO board indicates their results.

LED (D701) INDICATION SYMPTOM

Light No error 1 time blinking (Repeatedly) External RAM (S-RAM) error

(IC751)

2 times blinking (Repeatedly) Video decoder section error

(IC201)

3 times blinking (Repeatedly) Video RAM (D-RAM) error

(IC251)

4 times blinking (Repeatedly) Audio decoder section error

(IC201)

[VIDEO BOARD] (SIDE-A)

IC701

IC201

– 16 –

D701

IC771

IC901

AGING MODE

This mode can be used for operation check of CD section and tape deck section.

• If an error occurred: The aging operation stops.

• If no error occurs: The aging operation continues repeatedly.

1. Aging Mode in CD Section

1-1. Operating Method of Aging Mode

1. Set discs in DISC1 and DISC2 trays.

2. Select the function “CD”.

3. Press three buttons NEXT , ENTER/NEXT , and KARAOKE PON/MPX simultaneously.

4. The aging mode is activated, if a roulette mark on the fluorescent indicator tube is blinking.

5. In the aging mode, the aging is executed in a sequence given in “1-2. Operation during Aging Mode”. The aging continues unless an alarm occurred.

6. To exit from the aging mode, press POWER button to turn the set OFF.

• If a button other than buttons In CD section is pressed during aging, the aging in the CD section is finished.

• To ex ecute aging to the tape deck section successively , press · button in the deck A. “AGING” is displayed on the fluorescent indicator tube. (For the aging in tape deck, see “2. Aging Mode in Tape Deck Section”.

1-2. Operation during aging Mode In the aging mode, the program is executed in the following sequence.

1. The disc table is ejected.

2. The disc tray turns to select a disc. (For a disc selection sequence, see Section 1-3.)

3. TOC of disc is read.

4. The pick-up accesses to the last track.

5. A disc is ejected.

6. Steps 2 through 5 are repeated.

7. In the aging mode, the aging is executed in a sequence given in “2-2. Operation during Aging Mode”. The aging continues unless an alarm occurred.

8. To exit from the aging mode, press POWER button to turn the set OFF.

2-2. Operation during Aging Mode In the aging mode, the program is executed in the following sequence.

1. A tape on FWD side is played for one minute.

2. PAUSE STOP is made.

3. Recording is made for 3 minutes. (For the deck not having the record function, the play is executed. In this case, · LED does not light up.)

4. FF is executed up to the end of tape.

5. A tape is reversed, and the tape on REV side is played for one minute.

6. PAUSE STOP is made.

7. Recording is made for 3 minutes. (For the deck not having the record function, the play is executed. In this case, ª LED does not light up.)

8. FF is executed up to the end of tape.

9. Steps 1 through 8 are executed for the other deck.

10. Steps 1 through 9 are repeated unless an alarm occurred.

2-3. Deck Selection Sequence

• During the aging mode, decks are selected in the following sequence:

Deck A (FWD) → Deck A (REV)

↑↓

Deck B (REV) ← Deck B (FWD)

1-3. Disc Selection Sequence

• During the aging mode, discs are selected in the following sequence:

Disc 1 → Disc 2

↑↓

Disc 2 ← Disc 1

2. Aging Mode in Tape Deck Section

2-1. Operating Method of Aging Mode

1. Load a commercially available 10-minute tape into the decks A and B respectively. (If a 10-minute tape is not available, another tape may be used but a cycle time will be longer.)

2. Select the function “TAPE”.

3. Rewind tapes in advance by pressing 0 button respectively on decks A and B.

4. Press three buttons NEXT , ENTER/NEXT , and KARAOKE PON/MPX simultaneously.

5. Press · button on deck A. (This b utton triggers the aging mode.)

6. The aging mode is activated if “ AGING A” is displayed on the fluorescent indicator tube.

– 17 –

VIDEO CD COLOR BAR MODE

On this mode, the data of the color bar signal as a picture signal and the 1 kHz sine wave signal as a sound signal are output by the mechanism controller (IC701) for the video CD signal check. When measurement of the voltage and waveform on the VIDEO board, perform it in this mode. For reference, the color bar signal can be observed at J9001 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD (AUDIO) OUT) using an oscilloscope.

Procedure:

1. Turned power switch on.

2. Press the FUNCTION button to select the CD.

3. Connect the SL701 on the VIDEO board with solder.

4. After measuring, remove the soldering installed.

oscilloscope

E-F BALANCE MODE

Refer to the SECTION 6 ELECTRICAL ADJUSTMENTS page

22.

Procedure:

1. Turned power switch on.

2. Press the FUNCTION button to select the CD.

3. Connect the SL701 and SL703 on the VIDEO board with solder.

4. Press the · ∏ button in playback.

5. Every pressing the REPEA T button on the remote commander , the tracking servo and sledding servo are turned on or off.

6. When the servo is off, the counter on front panel will not be changed.

7. After measuring, remove the soldering installed.

set

Ω

J9001 (VIDEO OUT)

+ –

A = 0.9 to 1.1 Vp-p B = 0.678 to 0.75 Vp-p C = 0.214 to 0.328 Vp-p

Fig. 1 Video CD Color Bar Signal Output from J9001

(VIDEO OUT)

[VIDEO BOARD] (SIDE-B)

SL703

SL702

SL701

IC751

IC251

– 18 –

SECTION 4

set

MAIN board CN207 pin

(L-CH)

(R-CH)

MAIN board CN207 pin

(GND)

+ –

level meter

test tape P-4-A100 (10 kHz, –10 dB)

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

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

record/playback head pinch roller 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

Mode Torque Meter Meter Reading

Forward CQ-102C Forward

Back Tension (0.026 – 0.082 oz•inch)

Reverse CQ-102RC Reverse

Back Tension (0.026 – 0.082 oz•inch)

FF, REW CQ-201B

• Tape T ension Measurement

Mode Tension Meter Meter Reading

Forward CQ-403A more than 100 g (3.53 oz) Reverse CQ-403R more than 100 g (3.53 oz)

CQ-102C

CQ-102RC

36 to 61g•cm

(0.50 – 0.84 oz•inch)

2 to 6g•cm

36 to 61g•cm

(0.50 – 0.84 oz•inch)

2 to 6g•cm

61 to 143g•cm

(0.85 – 1.98 oz•inch)

DECK SECTION 0 dB=0.775 V

1. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.)

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

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

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 R-ch.

7. Switches and controls should be set as follows unless otherwise specified.

8. Set to test mode. (Press key switch same time

NEXT ENTER/NEXT and EFFECT ON/OFF buttons.)

• Test T ape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Adjustment

P-4-L300 315 Hz, 0 dB Level Adjustment

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note: Perform this adjustments for both decks. Procedure:

1. Mode: Playback (FWD)

– 19 –

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

that outputs match within 1 dB of peak.

output level

within 1 dB

L-CH peak

Tape Speed Adjustment DECK A

Note: Start the Tape Speed adjustment as below after setting to

the test mode. In the test mode, the tape speed is high during pressing the HIGH SPEED DUBBING button.

Procedure:

1. Turn the power switch on.

2. Press the NEXT button, ENTER/NEXT button and EFFECT ON/OFF button simultaneously. To exit from the test mode, press the POWER button.

R-CH

Screw position

peak

L-CH peak

R-CH peak

Screw position

3. Mode: Playback (FWD)

test tape P-4-A100 (10 kHz, –10 dB)

in phase 45°90°135°180

MAIN board CN207

(L-CH)

good

pin 2 (GND)

(R-CH)

wrong

set

waveform of oscilloscope

oscilloscope

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

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

Adjustment Location: Playback Head (Deck A)

Record/Playback Head (Deck B)

Mode: Playback (FWD)

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

set

MAIN board CN207 (pin

frequency counter

+ –

: L-CH)

pin 1 :R-CH

1. Insert the WS-48B into the deck A and the blank tape into the deck B.

2. Press the r REC button and · button on the deck B. Then the deck B is at recording mode.

3. Set the deck A to playback mode.

4. Keep pressing the HIGH SPEED DUBBING button in playback mode. Then at HIGH speed mode.

5. Adjust RV652 on the AUDIO board so that frequency counter reads 6,000 ± 90 Hz.

6. Take off the HIGH SPEED DUBBING button. Then at NORMAL speed mode.

7. Adjust RV651 on the AUDIO board so that frequency counter reads 3,000 ± 90 Hz.

8. Frequency difference between deck A and deck B the beginning of the tape should be within ± 1.5 %.

Adjustment Location: AUDIO board (See page 21)

Sample Value of Wow and Flutter: 0.3% or less W.RMS

(WS-48B)

forward

reverse

Playback level Adjustment DECK A DECK B

Procedure:

Mode: Playback (FWD)

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

set

MAIN board CN207 (pin

(pin

level meter

: L-CH)

: R-CH)

+ –

Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within adjustment level as follows.

Adjustment Level:

CN207 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: AUDIO board (See page 21)

– 20 –

Record bias Current Adjustment DECK B

Procedure:

1. Mode: Record

Adjustment and Connection Location:

[AUDIO BOARD] (Conductor Side)

pin 6 (L-CH) of IC1501 on the MAIN board.

#¶

(R-CH) of IC1501 on the MAIN board.

1) 315 Hz

2) 10 kHz

AF OSC

attenuator

pin 2 (GND) of CN207 on the MAIN board.



50 mV (–23.8 dB)

 

Ω

600

set

blank tape CS-123

2. Mode: Playback

recorded portion

set

MAIN board CN207 (pin

(pin 1: R-CH)

level meter

: L-CH)

+ –

Confirm playback the signal recorded in step 1 become adjustable limits as follows. If these levels do not adjustable limits, adjustment the RV341 (LCH) and RV441 (R-CH) on the AUDIO board to repeat steps 1 and 2. Adjustable limits: Playback output of 315 Hz to playback out-

put of 10 kHz: ±0.5 dB

Adjustment Location: AUDIO board

Record Level Adjustment DECK B

Procedure:

1. Mode: Record

(L-CH) of IC1501 on the MAIN board.

#¶

(R-CH) of IC1501 on the MAIN board.

AF OSC

315 Hz, 50 mV (–23.8 dB)

Ω

attenuator

600

blank tape CS-123

set

RECORD

BAIS



RV301 RV401





RV441RV341



PB LEVEL

– DECK B –

[MAIN BOARD] (Component Side)

CN207

IC201

IC301

RECORD LEVEL

TAPE SPEED





(NORMAL)

RV651

LEVEL

– DECK A –

RV1501

21 1

IC1501

22 42

RV1551

(HIGH) RV652



RV311

  

RV411



CN205



®

(GND) of CN207 on the MAIN board.

2. Mode: Playback

recorded portion

set

MAIN board CN207 (pin

(pin

level meter

: L-CH)

: R-CH)

+ –

Confirm playback the signal recorded in step 1 become adjustable limits as follows. If these levels do not adjustable limits, adjustment the R V1501 (LCH) and RV1551 (R-CH) on the MAIN board to repeat steps 1 and 2.

Adjustable limits:

CN207 PB level: 47.3 to 53.1 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

– 21 –

CD SECTION

+ –

BD board

TP (TE)

TP (VC)

oscilloscope

(DC range)

Notes:

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

2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated.

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

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

S-Curve Check

Connection:

oscilloscope

BD board

TP (FE)

TP (VC)

+ –

Procedure:

1. Connect the oscilloscope to TP (FE) and TP (VC) on BD board.

2. Connect the TP (FEI) and TP (VC) with lead wire.

3. Turned 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. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within

3.0 ± 1.0 Vp-p.

S-curve waveform

symmetry

within 3.0 ± 1.0 Vp-p

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

Note: • Try to measure several times to make sure that 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.

RF signal waveform

VOLT/DIV: 200 mV TIME/DIV: 500 ns (with the 10: 1 probe in use)

level: 1.3 Vp-p

+0.25 –0.20

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.

E-F Balance (Traverse or 1 Track Jump) Check

Connection:

When a general remote commander (RM-SV808) is used (Traverse Check): Procedure:

1. Connect the oscilloscope to TP (TE) and TP (VC) on BD board.

2. Turned power switch on.

3. Connect the SL702 and SL703 on the VIDEO board with solder.

4. Put disc (YEDS-18) in and press the · ∏ button, and play the number five track.

5. Press the REPEAT button on the remote commander. (The tracking servo and the sledding servo are turned off.)

6. Confirm that the level B of the oscilloscope’s waveform and the A (DC voltage) of the center of the traverse waveform. Confirm the following: A/B × 100 = less than ±22 %

Traverse waveform

0 V

Center of the waveform

A (DC voltage)

RF Level Check

Connection:

BD board

TP (RF) TP (VC)

oscilloscope

(AC range)

+ –

Procedure:

1. Connect the oscilloscope to TP (RF) and TP (VC) on BD board.

2. Turned power switch on. (stop mode)

3. Put disc (YEDS-18) in and press the · ∏ button.

4. Confirm that the 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.

level: 1.3 ± 0.6 Vp-p

7. Press the REPEAT button on the remote commander. (The tracking servo and the sledding servo are turned on.) Confirm that the C (DC voltage) is almost equal to the A (DC v oltage) is step 6.

Traverse waveform

0 V

Tracking servo

Sled servo

OFF

Tracking servo Sled servo ON

8. After check, remove the soldering installed in step 3.

– 22 –

C (DC voltage)

When a general remote commander is not used (1 Track Jump

)

Check): Procedure:

1. Connect the oscilloscope to TP (TE) and TP (VC) on BD board.

2. Turned power switch on.

3. Put disc (YEDS-18) in and press the · ∏ button, and play the number five track.

4. Press the · ∏ button. (Becomes the 1 track jump mode)

5. Confirm that the level B of the oscilloscope's waveform and the A (DC voltage) of the center of the traverse waveform. Confirm the following:

A – B

2 (A + B)

1 track jump waveform

× 100 = ±7 (%)

Center of the waveform

VIDEO SECTION

Frequency Adjustment

Connection:

VIDEO board

TP410 (DCLK)

Procedure:

1. Connect the frequency counter to TP410 (DCLK) on VIDEO board.

2. Turned power switch on.

3. Press the FUNCTION button to select the CD.

4. Adjust CT401 on the VIDEO board so that the frequency counter reading 13.5 MHz ± 40 Hz at stop status.

frequency counter

+ –

level : 1.3

0.6 Vp-p

symmetry

A (DC voltage

RF PLL Free-run Frequency Check

Connection:

BD board

TP (PLCK)

frequency counter

+ –

Procedure:

1. Connect the frquency counter to TP (PLCK) on the BD board.

2. Turned power switch on.

3. Put disc (YEDS-18) in and press the · ∏ button, and play the number five track.

4. Confirm that the reading on frequency counter is 4.3218 MHz.

Connection Location:

[BD BOARD] (SIDE-A)

Adjustment Location:

[VIDEO BOARD] (SIDE-B)

TP410 (DCLK)

CT401

IC402

(PLCK)

IC103

IC101

(RF)

(VC)

(FEL)

(FE)

– 23 –

SECTION 6

DIAGRAMS

6-1. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC301 µPD780016YGF-015-3BA (MASTER CONTROLLER)

Pin No. Pin Name I/O Function

1 TA-MUTE O 2 DBFB-H/L O 3 427-LAT O 4 K-CON-LAT O 5 K-CON-ON O 6 F-RELAY O 7 R-RELAY O 8 PL-RELAY O

9 TEST I 10 X2 O 11 X1 I 12 VDD — 13 XT2 O 14 XT1 I

15 RESET I

16 (INT/IN) I 17 (INT/IN/OUT) I 18 SCOR O 19 SOFT-TEST O 20 AC-CUT I 21 RDS-INT I 22 RDS-DATA I 23 VDD — 24 AVDD — 25 ADJ I 26 A-SHUT I 27 B-SHUT I 28 B-HALF I 29 CLK-CHECK I 30 SPEC-IN I 31 ADJ2 I 32 DEMO-MODE I 33 AVSS — 34 SQ-DATA-IN I 35 — — 36 D.OUT ON/OFF O 37 SW-ON/OFF O 38 FUNC1 I 39 FUNC2 I 40 VSS — 41 VOL-LAT O 42 PL-LAT O 43 COM-DIN I

44 COM-DOUT O

Line mute control signal output terminal “L”: mute on DBFB normal/high selection signal output terminal “L”: DBFB high, “H”: DBFB low Serial data latch pulse output to the electrical volume (IC201) Serial data latch pulse output to the key control (IC1401) On/off selection signal output of the key control circuit “L”: on Relay drive signal output for the main speaker (front speaker) “H”: on Relay drive signal output for the surround speaker “H”: on Relay drive signal output for the surround speaker “H”: on Connected to ground Main system clock output terminal (5 MHz) Main system clock input terminal (5 MHz) Power supply terminal (+5V) Sub system clock output terminal (32.768 kHz) Sub system clock input terminal (32.768 kHz) System reset signal input from the reset signal generator (IC302) “L”: reset For several

hundreds msec. after the power supply rises, “L” is input, then it changes to “H” Connected to ground Connected to ground Subcode sync (S0+S1) detection signal input terminal Not used (fixed at “L”) Output terminal for the software test (open) AC off detection signal input from the reset signal generator (IC302) Serial data reading clock signal input for the radio data system Not used (fixed at “L”) Serial data input for the radio data system Not used (open) Power supply terminal (+5V) Power supply terminal (+5V) (for A/D conversion) Setting terminal for the test Normally: “H” Shut off detection signal input from the deck-A reel pulse detector (Q1001) Shut off detection signal input from the deck-B reel pulse detector (Q1002) Detection input from the deck-B half detect switch (S1007) Not used (fixed at “L”) Setting terminal for the version Fixed at “L” Setting terminal for the test Normally: “L” Setting terminal for the demonstration H/L Fixed at “L” Ground terminal (for A/D conversion) Sub-code Q data input terminal Not used (fixed at “L”) Not used (open) Power on/off selection signal output for the CD digital out optical “H”: power on Not used (open) Setting terminal for the function 1 Fixed at “L” Setting terminal for the function 2 Fixed at “L” Ground terminal Serial data latch pulse output terminal Not used (open) Serial data latch pulse output terminal Not used (open) Serial data input terminal Not used (fixed at “L”) Serial data output to the electrical volume (IC201), DJ effect controller (IC401), and key

control (IC1401)

– 24 –

Pin No. Pin Name I/O Function

45 COM-CLK O

46 CD-POWER O 47 CD-DATA O 48 CD-CLK O 49 MSM-CND O 50 MSM-BUSY I 51 MSM-LAT O 52 MSM-NAR I 53 MSM-CH O

55 IIC-DATA I/O

56 IIC-CLK I/O

57 XRST O 58 XLT O 59 FOCUS-SW O 60 TBL-L O 61 TBL-R O 62 TRAY-LED O 63 LOAD-OUT O 64 LOAD-IN O 65 ST-CLK O 66 ST-DIN I 67 ST-DOUT O 68 ST-CE O 69 TUNED I 70 STEREO I 71 VSS — 72 ST-MUTE O 73 SENS2 I 74 SENS I 75 DISC-SENS I 76 T-SENS I 77 UPSW I 78 ENC3 I 79 ENC2 I 80 ENC1 I

81 OUT-OPEN I

82 CAP-H/N O

83 A-TRG O 84 B-TRG O 85 TRG-LOW O

INPUT-

CHANGE

Serial data transfer clock signal output to the electrical volume (IC201), DJ effect controller (IC401), and key control (IC1401)

Power on/off selection signal output for the CD circuit “H”: power on Serial data output terminal Not used (open) Serial data transfer clock signal output terminal Not used (open) Command data output to the DJ effect controller (IC401) Busy signal input from the DJ effect controller (IC401) “L”: busy Serial data latch pulse output to the DJ effect controller (IC401) NAR signal output terminal Not used Channel select output to the DJ effect controller (IC401)

MD/VIDEO input gain control signal output terminal “L”: VIDEO, “H”: MD

Communication data bus with the fluorescent indicator tube driver (IC601) and IIC interface controller (IC901)

Communication data reading clock signal input or transfer clock signal output with the fluorescent indicator tube driver (IC601) and IIC interface controller (IC901)

Reset signal output to the IIC interface controller (IC901) “L”: reset Serial data latch pulse output terminal Not used (open) Focus control signal output terminal Not used (open) Motor drive signal output to the disc tray turn motor driver (IC701) Motor drive signal output to the disc tray turn motor driver (IC701) LED on/off control signal output for the CD tray LED Not used (open) Motor drive signal output to the disc tray slide motor driver (IC801) Motor drive signal output to the disc tray slide motor driver (IC801) PLL serial data transfer clock signal output to the FM/AM tuner unit PLL serial data input from the FM/AM tuner unit PLL serial data output to the FM/AM tuner unit PLL chip enable signal output to the FM/AM tuner unit Tuning detection signal input from the FM/AM tuner unit “L”: TUNED FM stereo detection signal input from the FM/AM tuner unit “L”: STEREO Ground terminal Tuner mute control signal output to the FM/AM tuner unit “L”: mute on Internal status (SENSE) signal input terminal Not used (fixed at “L”) Internal status (SENSE) signal input terminal Not used (fixed at “L”) Disc status detection signal input from the disc sensor (IC703) Disc tray status detection signal input from the disc tray sensor (IC702) Up switch input terminal Not used (open)

Detection signal input from the disc tray address detect rotary encoder (S811)

Detection signal input from the disc tray open/close detect switch (S801) “L”: open, “H”: close

High/normal speed selection signal output of the capstan motor (M1) “L”: high speed, “H”: normal speed

Motor drive signal output to the trigger motor driver (IC1502) Motor drive signal output to the trigger motor driver (IC1502) Motor control signal output to the trigger motor driver (IC1502)

– 25 –

Pin No. Pin Name I/O Function

86 CAP-M-ON/OFF O 87 PB-A/B O

88 EQ-H/N O

89 BIAS O

90 REC-MUTE O

91 NR-ON/OFF O

92 R/P-PASS O

93 TC-MUTE O

94 A-PLAY-SW I 95 B-PLAY-SW I

96 RELAY O

97 A-HALF I

98 POWER O 99 SW-F-CON O

100 STK-MUTE O

Capstan motor on/off control signal output terminal “L”: capstan motor on Deck-A/B selection signal output to the HA12203NT (IC1501) “L”: deck-A, “H”: deck-B Normal/high speed selection signal output to the HA12203NT (IC1501)

“L”: normal speed, “H”: high speed Recording bias on/off selection signal output to the HA12203NT (IC1501)

“L”: bias off, “H”: bias on Recording mute on/off selection signal output to the HA12203NT (IC1501)

“L”: mute on, “H”: mute off Dolby NR on/off selection signal output to the HA12203NT (IC1501)

“L”: dolby off, “H”: dolby on Recording/playback/pass selection signal output to the HA12203NT (IC1501) Line mute on/off selection signal output to the HA12203NT (IC1501)

“L”: mute off, “H”: mute on Detection input from the deck- A play detect switch (S1001) “H”: deck-A play Detection input from the deck- B play detect switch (S1002) “H”: deck-B play Recording/playback select signal output to the REC/PB switch (IC602)

“L”: playback, “H”: recording Detection input from the deck-A cassette detect switch (S1004)

“L”: cassette in, “H”: no cassette On/off selection signal output of the main power supply “L”: power on Control signal output of the super woofer mode Not used (open) Power amplifier on/off selection signal output terminal “L”: on, “H”: standby

– 26 –

+ 60 hidden pages