SONY SCD 1 777ES Service Manual

SCD-1/777ES

SERVICE MANUAL

For Technical Service

SUPPLEMENT-1

File this supplement with the service manual for technical service.

Subject: Addition and Correction

TABLE OF CONTENTS

US Model

Canadian Model

AEP Model

(ENG-99002)

1. SERVICING NOTES ............................................... 2

2. TEST MODE.............................................................. 2

3. ELECTRICAL ADJUSTMENTS......................... 3

4. DIAGRAMS

4-1. Block Diagram – RF Section – ........................................ 5

4-2. Block Diagram – SERVO Section (1/2) – ....................... 6

4-3. Block Diagram – SERVO Section (2/2) – ....................... 7

4-4. Block Diagram – MAIN Section (1/3) – ......................... 8

4-5. Block Diagram – MAIN Section (2/3) – ......................... 9

4-6. Block Diagram – MAIN Section (3/3) – ......................... 10

4-7. Block Diagram – AUDIO Section – ................................. 11

4-8. Block Diagram

– DISPLAY/KEY CONTROL Section –........................ 12

4-9. Block Diagram – POWER SUPPLY Section – ............... 13

5. ELECTRICAL PARTS LIST ............................... 14

1. SERVICING NOTES <Page 3>

• Addition

DISPLAY OF SYS ERROR

SYS ERROR: Displayed if a communication between CPU

(IC701) and display controller (IC1001) failed at the start-up. Check the soldering of each IC and communication lines for disconnection.

REPLACING METHOD OF ROM (IC716)

If replacing the ROM, shift the ROM socket toward the arrow direction marked on the socket, then remove the ROM by hand. Do not touch the optical block when replacing the ROM.

2. TEST MODE <Page 11>

• Addition

(ADJUSTMENT-1 MODE)

Entering a command in the Adjustment-1 mode in other than the specified order could damage the optical block. Do not enter the command except for making electrical adjustment or the following check.

1. Disc type check After setting a disc, enter code 30. The type of disc is displayed.

2. Focus check Press the FILTER key without setting a disc. Check the laser emission of the pickup for SACD and the focus searching. Then, press the SACD/CD key to check the laser emission of the pickup for CD and the focus searching.

3. Tilt operation check Enter code 22 without setting a disc. Then, enter code 23 or

24. After entering the code, check that the tilt motor runs a little.

4. Sled operation check Press the NEXT key and check that the sled motor runs a little and the optical block moves outward a little. Inward movement can also be checked with the PREV key, unless the optical block is not at the most inward track.

5. Check of focus, tracking, spindle, and sled servos Set a disc and enter code 30 to check the disc type. Then, enter code 01, 02, 04, 05, 06, and 07 in this order. In such a case, the codes should be entered at a certain interval so that each servo circuit operates surely.

3. ELECTRICAL ADJUSTMENT

• Addition

Details of IC on RF or MAIN Board:

Board Ref.No.

RF IC001 (RF amp)

MAIN IC504 (F/T driver), IC505 (Tilt driver),

IC512 (Servo DSP), IC702 (ARP), and IC735 (EEPROM)

Adjustment Procedure

When part is not replaced:

1. S curve check

2. Traverse check

3. RF level check

4. CLV jitter check

5. Optical pick-up height adjustment

6. Overall adjustment

When Optical pick-up block is replaced:

1. Optical pick-up height adjustment

2. Overall adjustment

3. S curve check

4. Traverse check

5. RF level check

6. CLV jitter check

• Correction

(S Curve check) ! : Indicates corrected portion.

INCORRECT CORRECT

Specified Value:

Disc AB

SATD-S2 TCD-784

1.5 to 2.3 Vp-p - 0.1 to + 0.1 V

Specified Value:

Disc AB

SATD-S2 1.5 to 2.7 Vp-p TCD-784 1.5 to 2.3 Vp-p

• Correction

(Optical Pick-up Height Adjustment) ! : Indicates corrected portion.

INCORRECT CORRECT

Procedure:

11. Lock the OP height adjusting screw 1 when adjustment finished.

12. Press the

13. Press the ! button to turn the power off.

x button

Procedure:

11. Lock the OP height adjusting screw 1 when adjustment finished.

12. Lock the OP height adjusting screw 1 at screw lock.

13. Press the x button

14. Press the ! button to turn the power off.

- 0.1 to + 0.1 V

• Correction

(Overall Adjustment) ! : Indicates corrected portion.

INCORRECT CORRECT

Thresholds for Overall Adjustment

NO. Description U limit L limit

00 PI Level SL 0 4 01 PI Level DL 7

• Addition

The example of thresholds for overall adjustment:

On No. 22 Focus Bias CD, the specified value is from E0 to 20. Therefore, values like E9, FF, 03, 15 are within the specified value.

Thresholds for Overall Adjustment

NO. Description Low limit Upper limit

00 PI Level SL 0 4 01 PI Level DL 7

4. DIAGRAMS

4-1. BLOCK DIAGRAM – RF Section –

SCD-1/777ES

DETECTOR

(FOR SACD)

DETECTOR

(FOR CD)

OPTICAL PICK-UP

BLOCK

(KHS-180A/J1N)

LASER DIODE

(FOR SACD)

LASER DIODE

(FOR CD)

SKEW

SENSOR

RFP

CDE CDF

PD1 PD2

DVD LD

CD LD

MON

LED

SKEW OUT

SKEW IN

DVDRFP

CDRF

A B C D

AUTOMATIC POWER

CONTROL (FOR SACD)

Q004

AUTOMATIC POWER

CONTROL (FOR CD)

Q002

B+ SWITCH

Q007

5 6 7 8

16 15

14 13 12 11

D+5V

A2 B2 C2 D2

A B C D

CDRFDC

PD1

PD2

DVDLD

DVDPD

CDLD

CDPD

MUX

+ –

L.P.F.,

GCA

– +

DVD

SUMMING

AMP

GCA,

AMP

SUMMING

APC

MUX

+ –

+ +

LDON 25 27

ATOP

ATT

ATON

COMPARATOR

GCA

62 61

DETECTOR

+ –

+ +

VCI

AIP

INPUT

59 60

PHASE

MUX

BIAS,

AIN

AGC

SACD / CD RF AMP,

FOCUS/TRACKING ERROR AMP

MUX

L.P.F.,

AGC

L.P.F.

AGC

TOP

HOLD

IC001

AGC CHARGE

PUMP

DEFECT SWITCH

PROGRAM-

MABLE

EQ FILTER

L.P.F.,

GCA

SERIAL PORT

OFFSET

CANCEL

DAC

PEAK/BOTTOM

HOLD

FNP FNN

OFFSET

CANCEL

INPUT

BUFFER

MUX

COMPARATOR

+ –

FDCHG

52 51

DIP

DIN

AGC CHARGE PUMP

FULL WAVE

RECTIFIER

SIGO

DSDRF

(Page 8)

• SIGNAL PATH

: SACD : CD

SELECT SWITCH

IC007 (1/2)

SELECT SWITCH

IC007 (2/2)

SELECT SWITCH

IC011 (1/2)

SELECT SWITCH

IC011 (2/2)

SSIDT, SSICK, SDEN

FDWN

PIOFS

LDON

DFCTB

MIRR

(Page 6)

(Page 7)

(Page 6)

(Page 7)

(Page 6)

(Page 7)

SDATA

SCLK SDEN

MIN

HOLD1

DFT

MIRR

SSIDT

SSICK

SDEN

FE GCA

IC006 (2/2)

PI OFSET

CANCEL

IC006 (1/2)

TRACKING COIL

2-AXIS DEVICE

FOCUS/

(FOR SACD)

2-AXIS DEVICE

FOCUS/

(FOR CD)

VLD

DVD FCS+ DVD FCS–

DVD TRK+

DVD TRK–

CD FCS+ CD FCS–

CD TRK+ CD TRK–

B+ SWITCH

Q003

DSDF+ DSDF–

DSDT+

DSDT–

CDF+ CDF–

CDT+ CDT–

B+ SWITCH

TILT ERROR

AMP

IC003, 004

Q008, 009

RF+5V

GCA

IC012, Q006

VC BUFFER IC002, 005

RF+5V

DVC/AVC

BUFFER

IC508

DCV ACV

SLOUTS

TILT/H

TIOFS

DSDF+, DSDF–,

DSDT+, DSDT–

CDF+, CDF–,

CDT+, CDT–

TIERR

TIE

11 12

(Page 6)

(Page 7)

+ 9 hidden pages