SONY CDP-CX53 Service Manual

CDP-CX53

SERVICE MANUAL

US Model

Canadian Model

AEP Model

E Model

Australian Model

Model Name Using Similar Mechanism	CDP-CX50/CX571
CD Mechanism Type	CDM-46C2
Base Unit Type	KSM-213BFN/M-NP
Optical Pick-up Type	KSS-213B/S-N

SPECIFICATIONS

Compact disc player
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 reponse	2 Hz to 20 kHz ± 1dB
Signal-to-noise ratio	More than 100 dB
Dynamic range	More than 88 dB
Harmonic distortion	Less than 0.013%
Channel separation	More than 95 dB

Output

Jack

Maximum

Load impedance

type

output

level

LINE OUT

Phono

2V

Over 10 kilohms

Jacks

(at 50 kilohms)

DIGITAL

Optical

–18 dBm

Wave length: 660 nm

OUT

output

(OPTICAL)

connector

General

Power requirements

Where purchased	Power requirements
USA/Canada	120 V AC, 60 Hz
Australia	240 V AC, 50 Hz
Europe	220 V – 230 V AC, 50/60 Hz
Other countries	110 V – 120 V or 220 V – 240 V AC,
	adjustable, 50/60 Hz
Power consumption	12 W
Dimensions (approx.)	When the front cover is closed
(w/h/d)	430 × 182.5 × 295 mm (17 × 7 1/4 × 11 5/8 in.)
	incl. projecting parts
	When the front cover is open
	430 × 182.5 × 414 mm (17 × 7 1/4 × 16 3/8 in.)
	incl. projecting parts
Mass (approx.)	5.2 kg (11 lbs 8 oz)

Supplied accessories

Audio cord (2 phono plugs – 2 phono plugs) (1) CONTROL A1 cord (supplied for Canadian models only) (1) Remote commander (remote) (1)

Sony SUM-3 (NS) batteries (2) CD booklet holder (1)

Label (1)

Design and specifications are subject to change without notice.

COMPACT DISC PLAYER

MICROFILM

	TABLE OF CONTENTS
1.	SERVICING NOTE ..................................................	3
2.	GENERAL ...................................................................	4
3.	DISASSEMBLY .........................................................	5
4.	TEST MODE ..............................................................	9
5.	MECHANICAL ADJUSTMENTS .......................	12
6.	ELECTRICAL ADJUSTMENTS .........................	15
7.	DIAGRAMS .................................................................	17
7-1.	Printed Wiring Board – BD Section – ...........................	19
7-2. Schematic Diagram – BD Section – ...............................		21
7-3.	Printed Wiring Board – Audio Section – .......................	23
7-4.	Schematic Diagram – Audio Section – ..........................	25
7-5.	Printed Wiring Boards – Panel Section – ......................	27
7-6.	Schematic Diagram – Panel Section – ..........................	29
7-7.	Printed Wiring Board – Sensor/Motor Section – ..........	31
7-8.	Schematic Diagram – Sensor/Motor Section – .............	33
7-9. IC Pin Function Description ...........................................		37
8.	EXPLODED VIEWS ................................................	43
9.	ELECTRICAL PARTS LIST ...............................	49

MODEL IDENTIFICATION

— BACK PANEL —

	PARTS No.
PARTS No.	MODEL
4-997-124-01	US model
4-997-124-11	Canadian model
4-997-124-21	AEP, AED model
4-997-124-31	Australian model
4-997-124-41	E model
4-997-124-51	Singapore model

• Abbreviation

AED: North Europe

CAUTION

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

The 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.

(Except for the customers in the United States and Canada)

The following caution label is located inside the unit.

CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND

INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR

SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE

FOR STRÅLING.

VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.

VARO! : AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-

TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD

OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.

ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG

SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.

VIGYAZAT! : A BURKOLAT NYITÁSAKOR LÁTH ATATLAN LÉZERSU-

GÁRVESZÉLY ! KERÜLJE A BESUGÁRZÁST !

– 2 –

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check 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 VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)

To Exposed Metal

Parts on Set

SECTION 1

SERVICING NOTES

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 waveform is output repeatedly.

0.15 F				1.5 kΩ	AC
					voltmeter
					(0.75 V)

Earth Ground

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

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.

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !

SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 3 –

This section is extracted from instruction manual.

LOCATION OF PARTS AND CONTROLS

Front Panel

SECTION 2 GENERAL

1

2

3

4

5

6

7

8

STANDBY

PUSH

OPEN

I/u

			BLOCK
PLAY MODE REPEAT	BLOCK FILE 1	2	3	4	5

PULS ONE

ª

P p

DISC

9

PUSH ENTER

CHECK CLEAR

±

±

!

!¢

!£

!™

!¡

0

1	I/u(power switch) button	8	CHECK button
2	Front cover	9	CLEAR button
3	PLAY MODE button	!º	±button
4	REPEAT button	!¡	button
5	Display window	!™	pbutton
6	BLOCK 1-5 buttons	!£	Pbutton
7	DISC PUSH ENTER knob	!¢	·button

! PLUS ONE button

– 4 –

SECTION 3

DISASSEMBLY

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

CASE, FRONT PANEL	5 connector	1 two screws
	(CN803)	(M3 × 8)

1 two screws

	(M3 × 8)	2 case
4 screw
3 two screws	(BVTT3 × 6)
(BVTT3 × 6)
9 claw

1 two screws

(M3 × 8)

6 wire (flat type) (15 core) (CN801)

0 front panel

7 wire (flat type) (9 core) (CN103)

9 claw

8three screws (BVTT3 × 6)

TABLE (50)

3 bracket (ILLUMINATION)

	4 screw
	(PTPWH2.6 × 8)	1 screw
		(BVTT3 × 6)
	5 table (50)	2 connector
		(CN84)

– 5 –

CD MECHANISM DECK SECTION

	2 reinforcement
	3 two screws	5 two screws	6 connector
			(CN53)
	(BVTP3 × 8)	(BVTT3 × 10)
	4 ring (B)
	9 screw
	(P3 × 14)
	0 connector		7 wire (flat type) (12 core)
			(CN102)
	(CN51)
	9 screw		8 base (LOADING)
	(BVTT3 × 8)
	!¡ connector		5 screw
	(CN61)		(BVTT3 × 6)
			1 screw
			(BVTT3 × 6)
			!™ base (CDM)

AUDIO BOARD

1 two screws	1 screw
	(BVTP3 × 8)
	3 two screws
	(BVTT3 × 6)
	4 transformer cover
2 ring (A)	6 two screws
	(BVTT3 × 6)
	8 connector
	(CN701)
	9 AUDIO board
	5 screw
	(BVTT3 × 6)
	7 three screws
	(BVTP3 × 10)

– 6 –

BASE UNIT

	1 two screws	3 screw
	(BTP2.6 × 8)
	2 bracket	(BTP2.6 × 10)
		4 reinforcement (small)
		5 two tention springs
		7 base unit

6 four screws (PTPWH2.6 × 8)

BD BOARD, SLED MOTOR (M102)

6 gear (A) (S)	8 gear cover
	7 three claws
5 claw
0 two screws
(2 × 3)	9 gear (B) (RP)

!¡ sled motor	1 wire (flat type) (16 core)
(M102)	(CN101)
	4 BD board

2 screw

(B2 × 5)

3Removal four solders.

– 7 –

OPTICAL PICK-UP (KSS-213B/S-N)

3 Remove the optical pick-up to direction of the arrow A.

A

2 sled shaft

1 claw

– 8 –

SECTION 4 TEST MODE

DISPLAY CHECK MODE

Note:

This will not work properly if the DISC is set to any slit.

1.Press the I/u button, turn ON the power, and set a CD in any slit.

2.Press the I/u button, and turn OFF the power.

3.While pressing the [CHECK] and [PLUS ONE] buttons together with the power OFF, press the I/u button and turn ON the power.

4.All the segments of the fluorescent indicator tube light up, and the · , P , and [PLUS ONE] LEDs light up.

5.To exit the display check mode, press the I/u button.

ADJ MODE

1.Press the I/u button to turn the power ON.

2.Open the front cover, and press the [PLUS ONE] button.

3.Set the disc (YEDS-18 : 3-702-101-01) in the PLUS ONE slit.

4.Close the front cover, and chuck the disc.

5.Press the I/u button, and turn OFF the power.

6.Connect TP (ADJ) of the DISPLAY board and the ground with a lead wire.

7.Press the I/u button and turn ON the power.

The ADJ mode is set with the above.

Differences with normal mode

•No high speed search is performed during access

•Ignored even if GFS becomes L

•Ignored even if Q data cannot be read

•Spindle servo gain is set to 12 cm mode (Even with 8 cm disc) The following special functions will work when certain functions are pressed in this mode.

Special functions in ADJ mode

(The ( ) buttons function only with the general purpose remote.)

Button	Function
(3)	Tracking servo, sled servo OFF
(8)	Tracking servo, sled servo ON
CHECK	S shape observation mode

FLUORESCENT INDICATOR TUBE, LED ALL LIT, AND KEY CHECK MODE

Connect TP (AFADJ) and ground of the DISPLAY board with a lead wire.

When a button is pressed, the left side of the indicator tube will show how many buttons have been pressed so far.

(However, buttons already pressed once will not be counted.) The right side will show the numbers corresponding to the pressed buttons.

[ DISPLAY BOARD ] — CONDUCTOR SIDE —

CNP801

IC801

CNP804	TP(AFADJ)

TP(ADJ)

Buttons and Corresponding Button Numbers

Button						Button Number or Display
CLEAR				0
CHECK				1
DISC				2
PUSH ENTER
±				8
¹				9
REPEAT				14
PLAY MODE				15
BLOCK 5				16
BLOCK 4				17
BLOCK 3				18
BLOCK 2				19
BLOCK 1				20
I/u				21
PLUS ONE				While the button is pressed, LED (D803) lights up.
·				While the button is pressed, LED (D801) lights, and
				the whole fluorescent indicator tube lights up.
				The fluorescent indicator tube (segment check)
P				is partially lit and LED near by (D802) is lit while
				pressed.
p				The fluorescent indicator tube is partially lit while
				pressed (grid check).
		1 DISC
	*			*		* *			2
						CD 1

Count up

Button number

– 9 –

1.	Grid check
	1 DISC
	88	88	88
			CD 1
2.	Segment check
			7

--- onn

Key Inputs Other than Buttons and How to Display

	Key input	Display
	Rotate the JOG knob to	Fluorescent indicator tube block indicator
		lights up in the order of 1 n2 n3 n4 n
	the right
		5 n1 n·····.
	Rotate the JOG knob to	Fluorescent indicator tube block indicator
		lights up in the order of 5 n4 n3 n2 n
	the left
		1n5 n·····.
	Press the JOG knob	Displays button number 2
	(ENTER)
	Door cover “Close”	[STANDBY] LED goes OFF
	Door cover “Open”	[STANDBY] LED lights up

AGING MODE

•Mode which repeatedly changes and plays back discs automatically in the unit.

•It will repeat aging as long as no errors occur.

•If an error occurs during aging, it will stop all servos, motors, etc. instantaneously, display the error number, and stop operations. However, the stopping conditions differ according to whether the unit is equipped with the “self-protection function during errors” described later.

The function serves to maintain the state of the unit when errors occur.

Sequence of Aging Mode						Order of Disc Change
						(1 cycle takes 3 minutes)
			$
		1.	Disc change
									$
			$					1.	No. 51
		2.	Load in						$
			$					2.	No. 20
		3.	TOC read						$
			$					3.	No. 40
		4.	Access of last track						$
			$					4.	No. 30
		5.	3 second playback						$
			$					5.	No. 10
		6.	Access of first track						$
			$					6.	No. 40*
		7.	3 second playback						$
			$
		8.	Load out
			$

*DISC No. 40 chucks twice during one cycle.

To differentiate, the “ [2]” on the block indicator of the fluorescent indicator tube will light up during the second chucking.

Special Functions in Aging Mode

There are some useful function in the aging mode.

•Disc setting mode*1

•Switching of use/disuse of protection function in errors *2

•Aging cycle count function *3

*1 Disc setting mode:

5 discs are set before setting the aging mode. This mode makes the setting of these discs more easy.

*2 Switching of use/disuse of protection function in errors: Function which voluntarily corrects errors which occur during normal operations by retries.

If this function is not provided, all operations will be stopped without retiring. It is suitable for checking errors with low reproducibility.

If this function is provided, and errors can be corrected by retries, aging will be continued without stopping.

(The normal aging should be performed with “be”.)

*3 Aging cycle count function:

Functions which displays the number of agings carried out on

the Fluorescent indicator tube				in numbers. One aging cycle
consists of six discs.
	DISC	TRACK	MIN SEC
	51	1	0.01	*
Disc number		Track number		Agings carrried
				(1 n2 n3 n.....)

– 10 –

Aging procedure:

Some operating method will be changed depending on if the following jig for the aging mode exists or not.

• Jig
Parts. No	Description
J-2501-123-A	Remote commander (For aging mode)

With remote commander for aging mode:

1.Turn ON the power of the unit. Open the front cover.

2.Press the [AGING START] button of the remote commander

for aging mode.

3. When the disc set mode is set, the · and P LEDs blink.

4.Rotate the JOG dial. The slits (No. 10, 20, 30, 40, 51) for setting the discs will come forward. Insert the discs into these slits. Do not set the discs in other slits.

5.Set the use/disuse of the self protection function in errors. Press the [REPEAT] button. When REPEAT is displayed on the fluorescent indicator tube, the self protection function during the error will become “Use”.

If the REPEAT display is OFF, it means that the function is not used. (Normally set to “Use” when performing aging.)

6.Press the · button.

7.The · LED blinks, the aging mode is set, and aging is started.

8.The aging cycle lasts 3 minutes. When problems occur during aging, the error number will be displayed on the fluorescent indicator tube, and the P LED will light up.

(Refer to the following table for the details of the errors.)

9.Aging will be repeated as long as no errors occur.

10.After each aging cycle, the number displayed on the Fluorescent indicator tube will increase.

11.To end aging, press the I/u button

Error Display

DISC

51

26

Err

*

Without remote commander for aging mode:

1.	Turn ON the power of the unit. Open the front cover.
2.	Press the [PLAY MODE],	·	, and		¹		buttons in order.
3.	When the disc set mode is set, the					and	P LEDs blink.
				·

The following procedure is the same as in the case “With remote commander for aging mode”.

Disc number	Error code			number of agings
				(1 n2 n3 n.....)
Error code
Code number				Name		Contents
Err 01		DISC sensor check 1				No disc in the specified slit
Err 02		DISC sensor check 2				Disc in other slits
Err 03						No function
Err 04		Table operation check 2				No table sensor input
Err 05		Loading operation check 1				Load in timeover
Err 06		Loading operation check 2				Load out timeover
Err *1		BU related check 1				Access timeover
Err *2		BU related check 2				High speed search NG
Err *3		BU related check 3				Q data read error
Err *4		BU related check 4				BU operation (From focus search to until signal can be read) timeover
Err *5		BU related check 5				GFS monitor error
Err *6		BU related check 6				Focus cannot be imposed by focus search

The * numbers mean the following according to the state of the unit during aging 2 : From checking to end of TOC read

3 : From end of TOC read to end of last track playback

4 : From end of last track playback to end of first track playback

– 11 –

SECTION 5

MECHANICAL ADJUSTMENTS

To adjust the mechanism section, enter the mechanism section adjustment mode.

For how to enter the mechanism section adjustment mode, refer to each adjustment section.

DISC SENSOR ALIGMENT

1.Make sure that there is no disc in the unit.

2.Connect an oscilloscope to TP501 of the AUDIO board.

oscilloscope

	SENS	SENS (CH1)
		TEST (CH2)
	GND
	TEST	GND

AUDIO board

TP501

3. While pressing the [CLEAR] and [PLUS ONE] buttons at the same time and turn ON the power.

CHECK button

CLEAR button

POWER switch

± button

PLUS ONE button

button

4. The fluorescent indicator tube shows as follows, and the mechanism section adjustment mode is set.

Lit according to rotational direction

PLUS ONE

ALL DISCS

DISC	SEC

* *11111 3.6

	CD1
DISC No.	Rotation time

5.The disc table rotates in the clockwise direction. The disc table rotation time is displayed with “PLUS ONE” slit as a measur ing point.

6.Measure the waveform of the oscilloscope when the disc table is rotating.

– 12 –

7.Move the holder (sensor) center so that the flat portion center at the top of the SENS (CH1) input waveform and the ‘’H” cent er of TEST (CH2) coincide.

	Flat portion center of
TEST (CH2) waveform	SENS (CH1) waveform
SENS (CH1) waveform

Fixed screw

Holder (sensor)

8.Tighten the fixed screw to fix the disc table, then press the [CLEAR] button.

9.The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of the SENS (CH1) input waveform and the ‘’H” center of TEST (CH2) coincide.

10.If the adjustment is not successful, press the [CLEAR] button to rotate the disc table in the clockwise direction,

and perform steps 6 to 9.

Note: During the adjustment mode, the rotational direction is switched each time the [CLEAR] button is pressed.

Pressing the [CHECK] button enters the loading mode which will be described later. Pressing the [CLEAR] button rotates the disc table again.

– 13 –

MAGNET ASSY ALIGMENT

1.Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.

2.Turn OFF the power, close the door, and while pressing the [CLEAR] and [PLUS ONE] buttons simultaneously, turn ON the power again.

3.Press the [CHECK] button, and set the loading mode.

4.Press the ± button and chuck the disc.

5.Adjust the magnet assembly and magnet holder so that A=B as shown in the figure.

A B		Magnet ASSY

Screw (For adjustment)

Magnet ASSY

Magnet holder

DISC HOLDER A ALIGMENT

1.Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.

2.Turn OFF the power, close the door, and while pressing the [CLEAR] and [PLUS ONE] buttons simultaneously, turn ON the power again.

3.Press the [CHECK] button, and set the loading mode.

4.Press the ± button and chuck the disc.

5.	Press		or		button to stop the disc holder A slightly away from the disc.
		¹		±
6.	Rotate and adjust the adjusting screw so that the center of the disc and that of the disc holder coincide.

Disc holder A	Screw (For adjustment)

Disc

Disc

Disc holder A	a b
	a = b

– 14 –

SECTION 6

ELECTRICAL ADJUSTMENTS

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 applicator with neutral detergent when the signal level is low than specified value with the following checks.

S Curve Check

	oscilloscope
BD board
TP (FE)	+
TP (VC)	–

Procedure :

1.Press the I/u button and turn ON the power supply.

2.Open the front cover, and press the [PLUS ONE] button.

3.Set the disc (YEDS-18) into the “PLUS ONE” slit.

4.Close the front cover, and chuck the disc.

5.Press the I/u button and turn OFF the power.

6.Connect the oscilloscope to TP (FE) of the BD board.

7.Connect TP (ADJ) of the DISPLAY board and the ground with a lead wire.

8.Press the I/u button and turn ON the power.

9.The first track will be played back automatically. When the [CHECK] button is pressed, “S JI” will be displayed on the fluorescent indicator tube, and focus search will be repeated.

10.Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 1.8 ±

0.6 Vp-p.

S-curve waveforms

symmetry

A

within 1.8 ± 0.6Vp-p

B

11. Turn OFF the power, and remove the lead wire connected at step 7.

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.

RF Level Check

	oscilloscope
	(AC range)
BD board
TP (RF)	+
TP (VC)	–

Procedure :

1.Press the I/u button and turn ON the power supply.

2.Open the front cover, and press the [PLUS ONE] button.

3.Set the disc (YEDS-18) into the “PLUS ONE” slit.

4.Close the front cover, and chuck the disc.

5.Press the I/u button and turn OFF the power.

6.Connect the oscilloscope to TP (RF) of the BD board.

7.Connect TP (ADJ) of the DISPLAY board and the ground with a lead wire.

8.Press the I/u button and turn ON the power.

9.Playback the fifth track of the disc.

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

11.Turn OFF the power, and remove the lead wire connected at step 7.

Note: A clear RF signal waveform means that the shape “ à” can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV

TIME/DIV : 500ns

level : 1.6 ± 00..32 Vp-p

E-F Balance (Traverse) Check

The procedure for this checking method differs for when a general remote control unit is used and not used.

	oscilloscope
BD board
TP (TE)	+
TP (VC)	–

When a general remote commander is used:

1.Press the I/u button and turn ON the power supply.

2.Open the front cover, and press the [PLUS ONE] button.

3.Set the disc (YEDS-18) into the “PLUS ONE” slit.

4.Close the front cover, and chuck the disc.

5.Press the I/u button and turn OFF the power.

6.Connect the oscilloscope to TP (TE) of the BD board.

7.Connect TP (ADJ) of the DISPLAY board and the ground with a lead wire.

8.Press the I/u button and turn ON the power.

9.Playback the fifth track of the disc.

10.Press the [3] button on the remote commander. (The tracking servo and the sledding servo are turned OFF.)

11.Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform.

Confirm the following :

A/B x 100 = less than ± 10%

Traverse waveform

Center of the waveform

B

A (DC voltage) 0 V

level : 1.3 ± 0.5 Vp-p

12.Press the [8] button on the remote control unit. (The tracking servo and sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 11.

Traverse waveform

	C (DC
0 V	voltage)
Tracking servo	Tracking servo
Sled servo	Sled servo
OFF	ON

13.Turn OFF the power, and remove the lead wire connected at step 7.

– 15 –