DOWNLOAD Sony SCD-1 / SCD-777ES (serv.man4) Service Manual ↓ Size: 201.69 KB | Pages: 14 in PDF or view online for FREE

US Model

Canadian Model

AEP Model

For Technical Service

(ENG-99002)

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2

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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

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<Page 3>

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.

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.

<Page 11>

 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 follow-
ing check.

1. Disc type check

After setting a disc, enter code 30. The type of disc is dis-
played.

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

RF

IC001 (RF amp)

MAIN

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

IC512 (Servo DSP), IC702 (ARP), and

IC735 (EEPROM)

<Page 12>

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

Disc

A

B

SATD-S2

1.5 to 2.3 Vp-p

- 0.1 to + 0.1 V

TCD-784

<Page 13>

!

^

Disc

A

B

SATD-S2

1.5 to 2.7 Vp-p

- 0.1 to + 0.1 V

TCD-784

1.5 to 2.3 Vp-p

<Page 14>

!

Procedure:
11. Lock the OP height adjusting screw 1 when adjustment fin-

ished.

12. Press the

x

button

13. Press the

!

button to turn the power off.

Procedure:
11. Lock the OP height adjusting screw 1 when adjustment fin-

ished.

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.

$

4

NO.

Description

U limit

L limit

00

PI Level SL

0

4

01

PI Level DL

7

<Page 15>

!

^

NO.

Description

Low limit

Upper limit

00

PI Level SL

0

4

01

PI Level DL

7

^

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.