Sony CDP-CX20 Schematic

CDP-CX220

SERVICE MANUAL

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Model Name Using Similar Mechanism	CDP-CX250

CD Mechanism Type	CDM-40B

Base Unit Type	KSM-213BKN/M-N

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 response	20 Hz to 20 kHz ± 0.5 dB
Signal-to-noise ratio	More than 105 dB
Dynamic range	More than 98 dB
Harmonic distortion	Less than 0.0045%
Channel separation	More than 97 dB

Outputs

Jack

Maximum

Load impedance

type

output

level

LINE OUT

Phono

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, 50/60 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 × 200 × 480 mm (17 × 7 7/8 × 19 in.)
	incl. projecting parts
Mass (approx.)	9.5 kg (21 lbs)

Supplied accessories

Audio cord (2 phono plugs – 2 phono plugs) (1) Remote commander (remote) (1)

Sony SUM-3 (NS) batteries (2)

CD booklet holders (2) and label (1)

Design and specifications are subject to change without notice.

COMPACT DISC PLAYER

MICROFILM

	TABLE OF CONTENTS
1.	SERVICING NOTES ...............................................	3
2.	GENERAL ...................................................................	6
3.	DISASSEMBLY .........................................................	7
4.	TEST MODE ..............................................................	10
5.	MECHANICAL ADJUSTMENTS .......................	13
6.	ELECTRICAL ADJUSTMENTS .........................	19
7.	DIAGRAMS .................................................................	22
7-1. Note for Printed Wiring Boards and
	Schematic Diagrams .......................................................	23
7-2.	Printed Wiring Board – BD Section – ...........................	25
7-3. Schematic Diagram – BD Section – ...............................		27
7-4.	Printed Wiring Board – Main Section – ........................	29
7-5.	Schematic Diagram – Main Section – ...........................	31
7-6.	Printed Wiring Boards – Jack Section – ........................	33
7-7.	Schematic Diagram – Jack Section – ............................	35
7-8.	Printed Wiring Boards – Panel Section – ......................	37
7-9.	Schematic Diagram – Panel Section – ..........................	39
7-10. Printed Wiring Board – Sensor/Motor Section – ..........		41
7-11. Schematic Diagram – Sensor/Motor Section – .............		43
7-12. IC Pin Function Description ...........................................		47
8.	EXPLODED VIEWS ................................................	49
9.	ELECTRICAL PARTS LIST ...............................	56

MODEL IDENTIFICATION

— BACK PANEL —

PART No.

PART No.	MODEL

4-998-525-0	US model

4-998-525-1	Canadian model

4-998-525-2	AEP, AED UK model

4-998-525-4	Singapore model
4-998-525-5	E model
4-998-525-6	Australian model

• Abbreviation

AED: North European

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 –

SECTION 1

SERVICING NOTES

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

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
0.15 F	1.5 kΩ	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 –

CD-TEXT TEST DISC

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display.

To check, perform the following procedure.

Checking Method:

1.Turn ON the power, set the disc on the disc table with the side labeled as “test disc” as the right side, close the front cov er, and chuck the disc.

2.Press the · button and play back the disc.

3.The following will be displayed on the fluorescent indicator tube.

Display : 1kHz/0 dB/ L&R

4.Press the and ± buttons to switch the track. The text data of each track will be displayed.

For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data Contents” and “Table 2 : CDTEXT TEST DISC Recorded Contents and Display”.

Restrictions in CD-TEXT Display

In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For details, refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.

Table 1 : CD-TEXT TEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)

TRACK	Displayed Contents	TRACK	Displayed Contents
No.	Displayed Contents	No.	Displayed Contents
No.		No.
1	1kHz/0dB/L&R	22	1kHz/-90dB/L&R

2	20Hz/0dB/L&R	23	Infinity Zero w/o emphasis//L&R
3	40Hz/0dB/L&R	24	Infinity Zero with emphasis//L&R

4	100Hz/0dB/L&R	25	400Hz+7kHz(4:1)/0dB/L&R

5	200Hz/0dB/L&R	26	400Hz+7kHz(4:1)/-10dB/L&R

6	500Hz/0dB/L&R	27	19kHz+20kHz(1:1)/0dB/L&R

7	1kHz/0dB/L&R	28	19kHz+20kHz(1:1)/-10dB/L&R

8	5kHz/0dB/L&R	29	100Hz/0dB/L*

9	7kHz/0dB/L&R	30	1kHz/0dB/L*

10	10kHz/0dB/L&R	31	10kHz/0dB/L*

11	16kHz/0dB/L&R	32	20kHz/0dB/L*

12	18kHz/0dB/L&R	33	100Hz/0dB/R*

13	20kHz/0dB/L&R	34	1kHz/0dB/R*
14	1kHz/0dB/L&R	35	10kHz/0dB/R*
15	1kHz/-1dB/L&R	36	20kHz/0dB/R*
16	1kHz/-3dB/L&R	37	100Hz Squer Wave//L&R

17	1kHz/-6dB/L&R	38	1kHz Squer Wave//L&R
18	1kHz/-10dB/L&R	39	1kHz w/emphasis/-0.37dB/L&R

19	1kHz/-20dB/L&R	40	5kHz w/emphasis/-4.53dB/L&R

20	1kHz/-60dB/L&R	41	16kHz w/emphasis/-9.04dB/L&R

21	1kHz/-80dB/L&R

NOTE: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.

– 4 –

Table 2: CD-TEXT TEST DISC Recorded Contents and Display

(In this unit, some special characters cannot be displayed. This is no a fault.)

TRACK

Recorded Contents

Display

No.

” # $ % & ´

(21h to 27h)1kHz 0dB L&R

NAll the same

( ) * + , –

. /

(28h to 2Fh)

NAll the same

0 1 2 3 4 5 6 7

(30h to 37Fh)

NAll the same

8 9 : ; < = > ?

(38h to 3Fh)

NAll the same

@A B C D E F G

(40h to 47Fh)

NAll the same

H I J K L M N O

(48h to 4Fh)

NAll the same

P Q R S T U V W

(50h to 57Fh)

PQ R S T U V W (50h to 57h)

X Y Z [

]

^ _

(58h to 5Fh)

XY Z [

\ ]

^ _

(58····

′

a b c d e f g

(60h to 67Fh)

′ a b c d e f g

(60h to 67h)

j k

l m n o

(68h to 6Fh)

NAll the same

p q r s

t u v w

(70h to 77Fh)

p q r s

t u v w

(70h to 77h)

x y z {

}

(78h to 7Fh)

x y z {

} ~

(78····

¢ £ ¤ ¥

(A0h to A7h) 8859-1

i ¢ £ ¤ ¥

(A0····

is not displayed

C ª

¬ PR–

(A8h to AFh)

(A8···· C ª

¬ P R – are not displayed

•

2 3

′

μ ¶ •

(B0h to B7h)

′ μ

•

(B0···· •

± 2 3 ¶ are not displayed

† 1

(B8h to BFh)

†

(B8···· 1

4 ¿

4 are not displayed

À Á Â Ã Ä ÅÆÇ

(C0h to C7Fh)

ÀÁ Â Ã Ä ÅÆÇ (C0h to C7h)

È É Ê Ë Ì

Î Ï

(C8h to CFh)

NAll the same

D Ñ Ò Ó Ô Õ Ö

(D0h to D7Fh)

D ÑÒÓ Ô Õ Ö

(D0h to D7h)

Ø Ù Ú Û Ü Y

(D8h to DFh)

Ù Ú Û Ü Y

(D8····

à á â ã ä å æ ç

(E0h to E7h)

à á â ã ä å æ ç

(E0h to E7h)

è é ê ë

î ï

(E8h to EFh)

NAll the same

∂ ñ ò ó ô õ ö ÷

(F0h to F7Fh)

ñ ò ó ô õ ö ÷

(F0h to F7h)

ø ù ú û ü y´

(F8h to FFFh)

ø ù ú û ü y´

(F8h to FFh)

No.66

NAll the same

No.67

NAll the same

No.99

NAll the same

– 5 –

SECTION 2

GENERAL

LOCATION OF PARTS AND CONTROLS

Front Panel

2 3 4 5 6 7 8 9

!º !¡

!™

STANDBY

1/u

CONTINUE	SHUFFLE	PROGRAM	REPEAT	TIME/TEXT
GROUP 1	GROUP 2	GROUP 3	GROUP 4
GROUP 5	GROUP 6	GROUP 7	GROUP 8	GROUP FILE

@º !ª

1 I/u(power switch) button

2 CONTINUE button

3 SHUFFLE button

4 Display window

5 PROGRAM button

6 REPEAT button

7 TIME/TEXT button

8 Front cover

9 MEMO SEARCH button

!º INPUT button

!£

DISC/CHARACTER

INPUT

MEMO SEARCH

PUSH ENTER

	AMS
±	±	CHECK	CLEAR
OPEN/CLOSE
§	ª	P	p

!¢

!• !¶ !§ !

!¡ /±buttons

!™ JOG dial (DISC/CHARACTER/PUSH ENTER knob)

!£ CHECK button

!¢ CLEAR button ! pbutton

!§ Pbutton !¶ ·button

!• §(OPEN/CLOSE) button

!ª GROUP FILE button

@º GROUP 1 – 8 buttons

– 6 –

SECTION 3

DISASSEMBLY

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

CASE

1four screws

(case 3 TP2)

2 Open the case.

3Remove the case to direction of arrow A.

1 five screws

(case 3 TP2)

FRONT PANEL SECTION

1 flat wire (CN501)

6 Remove the door (CD) ass’y to direction of arrow A.

2 four screws (BVTP3 × 8)

4 claw

5 front panel section	4 claw

3 five screws (BVTT3 × 6)

– 7 –

GUIDE ASS’Y

3 three screws

4 (BVTT3 × 6) boss

5 guide ass’y

2 screw	3 three screws
2 screw	(BVTT3 × 6)
(PSW3 × 6)

1 connector (CN503)

REAR PANEL SECTION

	3 three connectors
1 connector	(CN504, 506, 507)
(CN505)
2 flat wire	6 rear panel section
(CN502)	6 rear panel section
	4 five screws
1 connector	(BVTT3 × 6)
(CN904)

	3 four screws
	(PTTWH3 × 6)
5 PC board
holder
7 four screws	8 bracket
(BVTT3 × 6)	8 bracket

– 8 –

MECHANISM DECK

2 mechanism deck

1 three screws

(BVTT3 × 8)

1six screws (BVTT3 × 8)

BASE UNIT

1 screw (BVTT3 × 8)

2 fulcrum plate (BU upper) ass’y

3 base unit

– 9 –

SECTION 4 TEST MODE

DISPLAY CHECK MODE

With the power turned off (standby state), press the I/u button

while pressing the P (pause) button.

All FL segments and grids light up together with the · (play), P (pause), and standby LEDs.

At the same time, the GROUP LEDs are scanned one by one.

Note: To exit this mode, press the p (stop) button.

ADJ MODE

1.Turn ON the power of the unit, set disc to disc table, and perform chucking.

2.Disconnect the power supply plug from the outlet.

3.To set ADJ mode, connect the test point (TP: ADJ) of the MAIN board to Ground, and connect the power supply plug to the outlet.

The power will turn on automatically, and the first track will be played.

In this mode, table rotation and loading operations are not performed because it is taken that the disc has already been chucked.

Note: The same operations are also performed in the following when the test point (TP: ADJ) is connected to Ground after turning on the power.

•Direct search (movement of sledding motor) is not performed during accessing

•Ignored even when GFS becomes L

•Ignored even when the Q data cannot be read

•Focus gain does not decrease

•Spindle gain does not decrease

•Servo related settings can be set manually and checked (Refer to ADJ Mode Special Functions Table)

ADJ Mode Special Functions Table

(The buttons shown with (		) function by using the sup-
plied remote commander only)

Button	Button Number or Display
CONTINUE	Servo average display
	Displays VC, FE, RF, TE and traverse in hexadecimal
	numbers

SHUFFLE	Focus bias display
	Each time this is pressed, the focus bias is switched
	between 1 and 2
	1
	Bias actually set	Optimum bias Minimum jitter
	2
	U:Upper aliasing bias L:Lower aliasing bias
PROGRAM	Auto gain display
	Displays focus, tracking, sledding in hexadecimal
	numbers
GROUP 1 (1)	Increases the focus bias in 8 steps.
GROUP 2 (2)	Sets the focus bias in the middle of aliasing.

GROUP 3 (3)	Turns off the tracking and sledding servo
GROUP 4 (4)	Returns the auto gain to the initial value (30)

GROUP 5 (5)	Turns off the focus servo
GROUP 6 (6)	Decreases the focus bias in 8 steps.
GROUP 7 (7)	Re-adjusts the focus bias

GROUP 8 (8)	Turns on the tracking and sledding servo
(9)	Switches the focus servo gain between normal and down
	FG. norm: normal, FG. down: down

(10/0)	Sets the focus bias to 0 (no bias)
	Next, displays the jitter measured at the focus bias set
CHECK	S-curve observation mode

CLEAR	Automatic eccentric measurement
	The results of measurement is displayed in mm directly.

KEY AND FLUORESCENT DISPLAY TUBE CHECK MODE

1.Connect the test point (TP:AFADJ) of the MAIN board to the Ground, and insert the power plug to the outlet to set this mode. First, the external SRAM is checked, and if abnormal, “SRAM NG” is displayed.

If OK, the following steps are performed.

*Fluorescent Display Tube Check Mode

The whole fluorescent display tube lights up when the connection in step 1 is made.

*Key Check Mode

This mode is set when a button is pressed after the whole fluorescent display tube lights.

All buttons have a button number.

When a button is pressed, the counter display is counted up, and the number of that button is displayed.

However, the counter display will only count up to 26, but the number of buttons pressed will always be displayed.

	O
**	**

Counter display			Button number display
Buttons and Corresponding Button Numbers

Button		Button Number or Display

CLEAR	3
CHECK	4

± (AMS)	5
(AMS)	6
PUSH ENTER	7

§ (OPEN/CLOSE)	9
INPUT	10

MEMO SEARCH	11
I/u	18
TIME/TEXT	19

GROUP FILE	20
GROUP 8	21

GROUP 7	22
GROUP 6	23

GROUP 5	24

REPEAT	27
PROGRAM	28

SHUFFLE	29
CONTINUE	30
GROUP 4	31

GROUP 3	32
GROUP 2	33

GROUP 1	34
·	All lit (LED lit)
P	Partial lighting 1 (LED lit)
p	Partial lighting 2
DISC/	Partial lighting 3
CHARACTER	•	When the jog dial is rotated to the right, the
		GROUP LEDs light up in the order of 1 → 2..8
		→ 2nd → 1.
	•	When the jog dial is rotated to the left, the
		GROUP LEDs light up in the order of 8 → 7..1
		→ 2nd → 8.

– 10 –

Partial lighting 1

A B C D E F G

Partial lighting 2

Partial lighting 3

2nd

*: Counter displayed

Test Points Location:

[MAIN BOARD] – Component Side –

IC502

TP (AFADJ)

TP		IC506
(ADJ)	IC501	IC506
	IC501

CN509

CN508

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. 40


	2.	Load in			$
					$
		$			2. No. 120


	3.	TOC read		$
				$
		$			3. No. 80


	4.	Access of last track			$
					$
		$			4. No. 200


	5.	3 second playback			$
					$
		$			5. No. 160


	6.	Access of first track		$
				$
		$
	7.	3 second playback

		$
	8.	Load out

		$

Special Functions in Aging Mode

1.Disc setting mode:

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

2.Self protection function during 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.

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 five discs.

number of agings

1DISC	2
CD1	2
DISC

*DISC-40*

– 11 –

Aging Method

1.Change the [COMMAND MODE] switch (S901) on set to

[CD1].

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

3.Press the [AGING START] button of the remote commander for aging mode (J-2501-123-A).

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

5.Rotate the JOG dial. The slits (No. 40, 80, 120, 160, 200) for setting the discs will come forward. Insert the discs into these slits. Do not set the discs in other slits.

6.Set whether the self-protection function during errors is equipped with the unit. Press the [REPEAT] button. If “REPEAT” is displayed on the Fluorescent indicator tube, it means the function is provided. If “REPEAT” is not displayed, it means the function is not provided.

7.Press the · button.

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

9.The aging cycle lasts 3 minutes. If errors occur during aging, the error number will be displayed on the Fluorescent indicator tube. (Refer to the following table for the details of the errors.)

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

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

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

Error Display

1 2 0	E r r 0 1
æ ç è	æ ç è
Disc number	Error code
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		Table operation check 1	Table motor current over

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

Err *7		BU related check 7	Auto focus bias adjustment cannot be performed

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

– 12 –

SECTION 5

MECHANICAL ADJUSTMENTS

Perform the following steps before carrying out adjustments.

1.Turn ON the power of the unit, set disc to disc table No. 92, and perform chucking.

2.Turn OFF the power.

3.Remove the case.

4.While pressing the [STOP] button, turn ON the I/u button. The test mode is set.

5.The I/u button LED (STANDBY) starts blinking. (Test mode)

LED (STANDBY)

1/u p

1/ubutton

STOP button

Note 1: The cam will start rotating when the [GROUP 1] or [GROUP 5] button is pressed continuously in the test mode.

GROUP 1 button

GROUP 5 button

GROUP 1 button GROUP 5 button

Note 2: If the power cannot be supplied, the cam can be rotated by rotating the pulley with your finger.

cam

pulley

– 13 –

GUIDE (DISC T) ALIGNMENT

cam	holder (guide T)

cam

guide (disc T)	fixed screw

(1)Rotate the cam and adjust to the position shown in the figure.

guide (disc T)

(2)Check that the state is as shown in the figure.

disc

tapering screwdriver

guide (disc T)

disc

holder (guide T)

	holder	(4) Move the holder (guide T) with a tapering screwdriver,
		and set the position of the guide (disc T) to A:B=1:1.
(3) Loosen the fixed screw by about 60 °.	(guide T)

– 14 –

HOLDER (DISC A2) ALIGNMENT

cam	holder (disc A2)

cam

thrust screw

(1)Rotate the cam and adjust to the position shown in the figure.

disc

0 – 1 mm

holder (disc A2)

(2)Check that the state is as shown in the figure.

disc

holder (disc A2)

thrust screw

(3)After applying suitable locking compound to the 123123 part, rotate the thrust screw until the holder (Disc A2) comes to the center of the disc.

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SENSOR ALIGNMENT

Perform this adjustment after the “holder (disc A2) adjustment”.

If the disc table swings to the left and right just before the disc is chucked, perform the following adjustment.

cam

lever (stopper) ass’y

cam

(1) Rotate the cam and adjust to the position

bracket (sensor)

shown in the figure.

table ass’y

(2)Check that the lever (stopper) ass’y secures

the disc table as shown in the figure.

disc table

swing

lever (stopper) ass’y

(4) Moving the disc table right and left with a hand after the screw is fixed, the table will move by the play of a disc table. If the LEDs light up alternately, the adjustment will be performed correctly.

tapering screwdriver

LUMINOUS board

PLAY button

PAUSE button

bracket (sensor)

fixed screw

(3)Loosen the fixed screw by 60° to 90°, and use a tapering screwdriver to adjust the screw as shown in the figure.

Move the bracket (sensor) with the tapering screwdriver little by little, and fix the fixed screw at where the play button's LED (green) is switched to the pause button's LED (orange) (or its reverse).

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