Sony CFDCD-777-S Mk2 Service manual

CFD-CD777SMK2

SERVICE MANUAL

Ver 1.1 2004.06

Model Name Using Similar Mechanism NEW

CD Section Optical Pick-up Block Name KSM-213RDM or KSM-213CDM

Optical Pick-up Name KSS-213R or KSS-213C

TAPE Section

Model Name Using Similar Mechanism CFD-CD777S Tape Transport Mechanism T ype MF-CD777

E Model

CD player section

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs Wave length: 780 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.)

Spindle speed

200 r/min (rpm) to 500 r/min (rpm) (CLV)

Number of channels

Frequency response

20 - 20 000 Hz +0/−1.5 dB

Wow and flutter

Below measurable limit

Radio section

Frequency range

FM Saudi arabia 87.6 - 107 MHz

Other countries 87.6 - 108 MHz MW 530 - 1 605 kHz SW1 2.3 - 7 MHz SW2 7 - 22 MHz

FM: 10.7 MHz SW/MW: 455 kHz

Antennas

FM/SW: Telescopic antenna MW: Built-in ferrite bar antenna

SPECIFICATIONS

Cassette-corder section

Recording system

4-track 2 channel stereo

Fast winding time

Approx. 120 sec. with Sony cassette C-60

Frequency response

TYPE I (normal): 80 - 12 500 Hz

General

Speaker

Woofer: 10 cm (4 in.) dia., 4 ohms, cone type (2) Tweeter: 5 cm (2 in.) dia.,

Outputs

Headphones jack (stereo minijack) For 16 - 68 Ω impedance headphones

Maximum power output

24 W

Power requirements

For CD radio cassette-corder: 110 - 120, 220 - 240 V AC selectable, 50/60 Hz 12 V DC, 8 R20 (size D) batteries DC IN 12V jack For remote control: 3 V DC, 2 R6 (size AA) batteries

Power consumption

AC 47 W

CD RADIO CASSETTE-CORDER

Battery life

For CD radio cassette-corder:

FM recording

Sony R20P: approx. 4 h Sony alkaline LR20: approx. 9 h

Tape playback

Sony R20P: approx. 2 h Sony alkaline LR20: approx. 4 h

CD playback

Sony R20P: approx. 1.5 h Sony alkaline LR20: approx. 3 h

Dimensions

Approx. 761 × 245 × 258 mm (w/h/d)

× 10

inches) (incl. projecting parts)

(30 × 9

Mass

Approx. 9.5 kg (20 lb. 15 oz) (incl. batteries)

Supplied accessories

AC power cord (1) Remote control (1)

Design and specifications are subject to change without notice.

9-961-433-02 Sony Corporation

CFD-CD777SMK2

1. SERVICING NOTES ................................................ 3

2. GENERAL ................................................................... 4

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Rear Cabinet Section ...................................................... 7

3-3. Tape Mechanism Deck Block Section............................ 8

3-4. Cassette Holder ............................................................... 8

3-5. CD Block Section ........................................................... 9

3-6. Main Board...................................................................... 10

3-7. Optical Pick-up Section .................................................. 10

4. MECHANICAL ADJUSTMENTS....................... 11

5. ELECTRICAL ADJUSTMENTS

Tape Deck Section .......................................................... 11

Tuner Section .................................................................. 13

CD Section ...................................................................... 15

6. DIAGRAMS

6-1. Block Diagram – Tuner Section – ................................. 19

6-2. Block Diagram – CD Section – ..................................... 20

6-3. Block Diagram – MAIN Section – ................................ 21

6-4. Block Diagram

– AMP, POWER SUPPLY Section – .............................. 22

6-5. Note for Printed Wiring Boards

and Schematic Diagrams ................................................ 23

6-6. Printed Wiring Boards – MAIN Section – .................... 24

6-7. Schematic Diagram – MAIN (1/5) Section –................ 25

6-8. Schematic Diagram – MAIN (2/5) Section –................ 26

6-9. Schematic Diagram – MAIN (3/5) Section –................ 27

6-10. Schematic Diagram – MAIN (4/5) Section –................ 28

6-11. Schematic Diagram – MAIN (5/5) Section –................ 29

6-12. Printed Wiring Boards – PANEL Section – .................. 30

6-13. Schematic Diagram – PANEL Section – ....................... 31

6-14. Printed Wiring Boards

– AMP, POWER SUPPLY Section – .............................. 32

6-15. Schematic Diagram

– AMP, POWER SUPPLY Section – .............................. 33

6-16. IC Pin Function Description ........................................... 40

CAUTION

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

7. EXPLODED VIEWS

7-1. Rear Cabinet Section ...................................................... 41

7-2. Front Cabinet Section ..................................................... 42

7-3. CD Block Section ........................................................... 43

7-4. MD Block Section........................................................... 44

7-5. Tape Mechanism Deck Section-1 (MF-CD777) ............ 45

7-6. Tape Mechanism Deck Section-2 (MF-CD777) ............ 46

7-7. Tape Mechanism Deck Section (Deck A)-1

(MF-CD777) ................................................................... 47

7-8. Tape Mechanism Deck Section (Deck A)-2

(MF-CD777) ................................................................... 48

7-9. Tape Mechanism Deck Section (Deck A)-3

(MF-CD777) ................................................................... 49

7-10. Tape Mechanism Deck Section (Deck A)-4

(MF-CD777) ................................................................... 50

7-11. Tape Mechanism Deck Section (Deck B)-1

(MF-CD777) ................................................................... 51

7-12. Tape Mechanism Deck Section (Deck B)-2

(MF-CD777) ................................................................... 52

7-13. Optical Pick-up Section (KSM-213RDM) .................... 53

7-14. Speaker Section............................................................... 54

8. ELECTRICAL PARTS LIST ............................... 55

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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.

S701

SECTION 1

SERVICING NOTES

CFD-CD777SMK2

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig.

• Code number of Chuck Plate Jig: X-4918-255-1

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.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

1. Set the [FUNCTION] switch to CD.

2. Open the lid for CD.

3. Turn on S701 as following figure.

4. Press the NX button.

5. Confirm the laser diode emission while observing the objecting lens.When there is no emission, Auto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down three times for the focus search.

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 objecti ve lens.

HOW TO CHANGED THE CERAMIC FILTERS

This model is used three ceramic filters of CF1, CF2 and CF3. You must used same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must changed three pieces together since it's supply three pieces in one package as a spare parts.

CF1,

mark

CF3

Mark Center frequency

red 10.70 MHz

blue 10.67 MHz

orange 10.73 MHz

black 10.64 MHz

white 10.76 MHz

CFD-CD777SMK2

• LOCATION OF CONTROLS

Basic Operations

Playing a CD

142,3

SECTION 2

GENERAL

4 Press u (N on the remote).

This section is extracted from instruction manual.

The player plays all the tracks once.

Display

Basic Operations

Playing timeTrack number

1 Set FUNCTION to CD.

2 Press Z PUSH OPEN/CLOSE down

to open the lid of the CD compartment and place a CD on the CD compartment.

With the label side up

3 Close the lid of the CD compartment.

Listening to the radio

3123

Tip

During operation, the level meter shows the frequency level of the sound. Adjusting the volume will not affect the level meter.

Use these buttons for additional operations

FUNCTION Z PUSH OPEN/CLOSE

VOLUME

To Do this

adjust the volume Turn VOLUME.

stop playback Press x.

pause playback Press u. (On the remote, press

go to the next track Press >.

go back to the previous track Press ..

remove the CD Press ZPUSH OPEN/CLOSE.

turn off the player Set FUNCTION to TAPE¥ CD/

Use these buttons for additional operations

VOLUME Level meterFUNCTION

u., >

Level meter

X.) Press the button again to resume play after pause.

RADIO OFF.

Basic Operations

1 Set FUNCTION to RADIO.

2 Set BAND to select the band you

3 Turn TUNING to tune in the station

want.

you want.

For better SW reception, use FINE TUNING.

Tips

¥ During operation, the level

meter shows the frequency level of the sound. Adjusting the volume will not affect the level meter.

¥ If the FM broadcast is

noisy, set ISS¥FM MODE at the rear to MONO. Radio will play in monaural.

To Do this

adjust the volume Turn VOLUME .

turn off the radio Set FUNCTION to TAPE¥ CD/

To improve broadcast reception

Reorient the antenna for FM. Reorient the player itself for MW. For SW, extend the antenna vertically.

for FM

RADIO OFF.

for MW

for SW

CFD-CD777SMK2

Playing a tape

32132

For hookup instructions, see pages 19 — 20.

1 Set FUNCTION to TAPE¥CD/

2 Press xZ to open tape compartment

RADIO OFF.

and insert a recorded tape. Use TYPE I (normal) tape only. Close the compartment.

With the side you want to play facing you

3 Press PLAY N.

The player starts playing.

Note

During playback, do not press M, m or N on the other deck as this causes excessive wow and flutter.

Tips

¥During operation, the level

meter shows the frequency level of the sound. Adjusting the volume will not affect the level meter.

¥ To play tapes in both decks

successively, press N on deck B and then press PLAY and X on deck A as the same time. When the tape ends on deck B, the playback starts automatically on deck A.

Use these buttons for additional operations

DIRECTION

DIR MODE

h H

VOLUME

To Do this

adjust the volume Turn VOLUME.

stop playback Press xZ.

fast-forward or rewind the tape Press m or M.

pause playback Press X.

play the opposite side of Press down DIRECTION the tape (deck A only) once.

eject the cassette Press xZ.

To select the direction of the tape (deck A only)

To play Set DIR MODE to

both sides of the tape repeatedly

both sides of the tape from the front side to reverse side only*

* If play begins from the reverse side, the tape stops at the end of

that side.

Level meter

m, M

Press the button again to resume play after pause.

DIRECTION

h H

forward) indicators show the tape direction of deck A.

(reverse/

Basic Operations

Recording on a tape

1 Press xZ to open the tape

2 Select the program source you want

compartment on deck B and insert a blank tape. Use TYPE I (normal) tape only. Close the compartment.

to record.

To record from the CD player, set FUNCTION to CD and insert a CD.

To record from the radio, set FUNCTION to RADIO, and tune in the station you want using BAND and TUNING.

To record from the built-in microphone (MIC), set FUNCTION to TAPE¥CD/RADIO OFF.

312

MIC

With the side you want to record on facing you

Display

3 Start recording.

Deck B

Notes

¥ During recording, do not

press M, m or PLAY on deck A as this causes excessive wow and flutter.

¥While recording from the

built-in microphone (MIC), no sound comes from the speakers or the headphones.

¥When you connect the

microphone to the MIX MIC jack, you cannot record from the built-in microphone.

Tips

¥ Adjusting the volume or

selecting the audio emphasis will not affect the recording level.

¥ If the MW program makes

a whistling sound after you’ve pressed z in step 3, set the ISS¥FM MODE (Interference Suppress Switch) at the rear to the position that most decreases the noise.

¥ For the best results, use the

AC power as a power source.

¥ To erase a recording,

proceed as follows: 1 Insert the tape into deck

2 Disconnect the audio

source if connected to the TV/LINE IN jack at the rear.

3 Set FUNCTION to TV/

LINE IN.

4 Press z on deck B.

Press z on deck B (N is depressed automatically).

Use these buttons for additional operations

To Press

stop recording xZ on deck B

pause recording X on deck B

xZ X

Press the button again to resume recording.

Basic Operations

CFD-CD777SMK2

Dubbing

24 1143

4 Press X and then press PLAY on

Deck A

5 Start dubbing.

Deck B

deck A.

Press z on deck B (N is depressed automatically).

Basic Operations

1 Insert a recorded tape into deck A

and a blank tape into deck B. Use TYPE I (normal) tape only. Close the compartment.

2 Set FUNCTION to DUBBING.

3 To dub at high speed, press HIGH

SPEED DUBBING to

ON.

To dub at normal speed, press HIGH SPEED DUBBING to

OFF.

With the side you want to record on facing you

Note

During dubbing, do not set FUNCTION or press HIGH SPEED DUBBING as this causes excessive wow and flutter.

Tips

¥ Adjusting the volume or

selecting the audio emphasis will not affect the recording level.

¥ For the best results, use the

AC power as a power source.

¥When the tape in deck A

ends first, deck B will continue recording till the tape end. When the tape in deck B ends first, deck A plays on according to the setting of the DIR MODE switch.

Use these buttons for additional operations

To stop dubbing

Press xZ on deck A and B.

xZ xZ

)

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

3-1. DISASSEMBLY FLOW

Set

3-2. REAR CABINET SECTION

(Page 7)

CFD-CD777SMK2

SECTION 3

DISASSEMBLY

3-3. TAPE MECHANISM DECK

BLOCK SECTION (Page 8)

3-4. CASSETTE HOLDER

(Page 8)

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

3-5. CD BLOCK SECTION

(Page 9)

3-6. MAIN BOARD

(Page 10)

3-7. OPTICAL PICK-UP

SECTION (Page 10)

3-2. REAR CABINET SECTION

Pull up the handle to direction of the arrow.

two screws (BVTP3

10)

five screws (BVTP3 × 20)

three screws (BVTP3 × 20)

rear cabinet section

connector (CNP315)

connector (CNP313)

connector (CNP306

CFD-CD777SMK2

3-3. T APE MECHANISM DECK BLOCK SECTION

connector (CNP304)

10)

two screws (BVTP3

two connectors (CNP303, 312)

10)

two connectors (CNP301, 302)

two screws (BVTP3

10)

mechanism deck block

mode knob

lever direction

slide direction

Note for installation:

Make it sure that each of three levers of mechanism deck block hooks to slide direction, lever direction and mode knob.

tape mechanism deck block section

3-4. CASSETTE HOLDER

cassette holder

Press claw.

cassette lid

damper

screw (BVTP3

10)

Push two eject button.

damper

screw (BVTP3

10)

Slide up cassette lid.

cassette spring

cassette holder

cassette spring

boss

cassette holder

boss

3-5. CD BLOCK SECTION

CD block section

connector (CNP1)

screw (BVTP3 × 10)

two connectors (CNP303, 312)

screw (BVTP3

10)

two connectors (CNP304, 308)

CFD-CD777SMK2

cla

claw

DIAL POINTER SETTING

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

screw

(BVTP3

stopper

10)

pointer

two connectors (CNP301, 302)

Set the main board.

Rotate the tuning capacitor gear full in direction of the arrow.

tuning gear

idle gear

pointer

point

Set two gears and pointer in the figure.

CFD-CD777SMK2

)

3-6. MAIN BOARD

two connectors (CNP311, 710)

flat wire (CNP701)

connector

two screws (BVTP3 × 10)

3-7. OPTICAL PICK-UP SECTION

two screws (2.6 × 16)

connector (CNW307)

optical pick-up section

main board

two screw (2.6 × 16)

two screws (BVTP3 × 10

SECTION 4

)

L-CH peak

R-CH peak

Screw position

output level

within 1 dB

Screw angle

MECHANICAL ADJUSTMENTS

CFD-CD777SMK2

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

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

record/playback head playback head pinch roller erase head rubber belts capstan idlers

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

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.

6. Power supply voltage: 12V dc.

Torque Measurement

Mode Torque Meter Meter Reading

Playback CQ-102C

Back tension CQ-102C

Rewind Fast foward (0.77 – 1.66 oz•inch)

CQ-201B

Tape Tension Measurement

Tension Meter Meter Reading

CQ-403A more than 60 g (2.12 oz)

DECK-A DECK-B

30 – 60 g•cm

(0.42 – 0.83 oz•inch)

1.8 – 7 g•cm

(0.025 – 0.097 oz•inch)

55 – 120 g•cm

DECK-A DECK-B

TAPE DECK SECTION 0 dB=0.775 V

1. The adjustments should be perfomed in the order given in the service manual. (As a general rule. Playback circuit adjustment should be completed before performing recording circuit adjustment)

2. The adjustments should be performed for both L-ch and R-ch unless otherwise indicated.

• Switch and control position

FUNCTION switch.......................... TAPE CD/RADIO OFF

MEGA BASS control ..............................................minimum

VOLUME control ................................................... maximum

BALANCE control ....................................mechanical center

Standard Output Level

SP Out Phones

Load impedance 4 Ω 32 Ω

Output level 0.775 V (0 dB) 0.25 V (–10 dB)

Test T ape

Type Signal Used for

WS-48B 3 kHz, 0 dB Tape speed adjustment

P-4-A063 6.3 kHz, –10 dB Head azimuth adjustment

Record/Playback Head Azimuth Adjustment

DECK-A DECK-B

Procedure:

1. Mode: FWD/REV playback (DECK A)

FWD playback (DECK B)

test tape P-4-A063 (6.3 kHz, –10 dB)

set

PHONES jack (J301

level meter

Ω

+ –

2. Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw

until both

of output levels match together within 1 dB.

CFD-CD777SMK2

3. Phase Check Mode: FWD/REV playback (DECK A)

FWD playback (DECK B)

test tape P-4-A063 (6.3 kHz, –10 dB)

L-CH

set

R-CH

in phase 45

PHONES jack (J301)

Screen pattern

90 °135 °180

Good Wrong

Ω

oscilloscope

–

4. Set in the REV mode and repeat the step 1 to 3.

5. After the adjustment, lock the screws with locking compound.

Adjustment Location:

Tape Speed Adjustment

DECK-A DECK-B

Procedure:

Mode: FWD/REV playback (DECK A)

FWD playback (DECK B)

frequency

Ω

counter

–

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

set

PHONES jack (J301)

Adjustment V alues:

Adjustment part Frequency counter

RV302 2,910 to 3,090 Hz

Frequency difference between the beginning and the end of the tape should be within 1% (30 Hz)

Note: (High speed: non Adjustment)

Adjustment Location: MAIN board (See page 14)

screw driver

deck A

deck B

CFD-CD777SMK2

)

TUNER SECTION 0 dB=1 µV

[FM]

Setting:

FUNCTION switch : RADIO BAND switch : FM

FM RF SSG

FM/SW

0.01

22.5 kHz frequency deviation by 400 Hz signal. output level: as low as possible

[MW]

Setting:

FUNCTION switch : RADIO BAND switch : MW

AM RF SSG

30% amplitude modulation by 400 Hz signal output level: as low as possible

Put the lead-wire antenna close to the set.

[SW]

Setting:

FUNCTION switch : RADIO BAND switch : SW1/SW2

FINE TUNING knob ......................................Mechanical center

AM RF SSG

telescopi antenna terminal

MW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L4 520 kHz

CT4 1,680 kHz

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L3 620 kHz

CT3 1,400 kHz

SW1 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L6 2.2 MHz

CT6 7.3 MHz

SW1 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L5 2.2 MHz

CT5 7.3 MHz

SW2 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L8 6.8 MHz

CT8 22.5 MHz

SW2 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L7 6.8 MHz

CT7 22.5 MHz

FM/SW telescopi antenna terminal

30% amplitude modulation by 400 Hz signal output level: as low as possible

Ω

set

PHONES jack (J301

12 PF

level meter

–

•Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L2 86.5 MHz

CT2 109.5 MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L1 86.5 MHz

CT1 109.5 MHz

FM VCO Adjustment

Setting:

FM RF SSG

0.001 µF

Carrier frequency : 98 MHz Modulation : 400 Hz, 30% FM modultion Output level : 0.1 V (100 dB)

MAIN boar IC1 pin

set

Procedure:

1. Connect the frequency counter to pin 4 and 7 of IC1 as shown the figure below.

2. Tune the set to 98 MHz.

3. Adjust RV2 for 76 kHz ± 500 Hz reading on the frequency counter.

frequency counte

MAIN board

IC1 pin

33 k

1 µF

Ω

+ –

Adjustment Location: MAIN board (See page 14)

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter

T1 455 kHz

CFD-CD777SMK2

Adjustment Location:

– MAIN BOARD (Component Side) –

SW2

Tracking

Adjustment

CT7

MW Tracking Adjustment

L3 CT3

JW27

IC1

FM/SW Antenna Terminal

T1 AM IF Adjustment

FM Tracking Adjustment

CT1

RV302

Tape Speed

Adjustment

SW1

Tracking

Adjustment

CT5

L8 CT8

SW2 Frequency Coverage

Adjustment

L6 CT6

SW1 Frequency Coverage

Adjustment

L4 CT4

MW Frequency Coverage Adjustment

FM Frequency

Coverage

CT2

Adjustment

RV2 FM VCO Adjustment

CFD-CD777SMK2

CD SECTION

Notes on Adjustment

1. Perform adjustment in test mode. After adjustments, be sure to release test mode.

2. Perform adjustments in the order given.

3. Use the disc (YEDS-18. Part No. 3-702-101-01) only when so indicated.

How to Put the Set into Test Mode

1. Short-circuit the JW811 and JW812 on the CONTROL board.

2. Turn on the power.

3. Open the short-circuit to release test mode.

– CONTROL BOARD (Component Side) –

LCD801

IC801

JW811 JW812

Before Begining Adjustment

Put the set into test mode and perform the following checks. Repair if there are any problems.

• Sled Motor Check

Press the >, . buttons and confirm that the optical pick-up moves smoothly from the innermost to outermost circumference and back smoothly and with no catching or abnormal noises.

> : Optical pick-up moves to the outer circumference . : Optical pick-up moves to the inner circumference

E-F Balance Adjustment

This adjustment is to be done when the optical pick-up is replaced.

Procedure:

oscilloscop

(DC range)

MAIN board

Solder bridge (TRACKING)

TP (VC)

–

1. Connect the oscilloscope to solder bridge (TRACKING) and TP (VC) on the MAIN board.

2. Put the set into test mode.

3. Optical pick-up setting to the center by > or . button pushing.

4. Put the disc (YEDS-18) and press NX button.

From focus searching, focus is turned ON while entering CLV drawing-in mode. Tracking and sled are turned OFF.

5. Adjust RV703 so that the oscilloscope traverse waveform is symmetrical, as shown in the figure below.

6. Release the test mode after adjustment is completed.

Note: Take long sweep time

for easy monitoring.

VOLT/DIV : 0.2 V (with the 10:1 probe in use.) TIME/DIV : 5 ms

A=B C=180 mVp-p to 420 mVp-p

0 V0 V

A=B

Adjustment Location: MAIN board (See page 18)

• Focus Search Check

1. Press the NX button. (Focus search operation is performed continuously.)

2. Look at the optical pick-up objective lens and confirm that it moves up and down smoothly, when no catching or abnormal noises.

3. Press the x button. Confirm that focus search operation stops. If it does not , press the x button again longer.

CFD-CD777SMK2

Focus Bias Adjustment

This adjustment is to be done when the optical pick-up is replaced.

Procedure:

oscilloscop

(AC range)

MAIN board

Solder bridge (FOCUS)

TP (VC)

+ –

1. Connect the oscilloscope to solder bridge (FOCUS) and TP (VC) on the MAIN board.

2. Put the set into test mode. (See page 24.)

3. Optical pick-up setting to the center by > or . button pushing. (Move the optical pick-up to the music area on the disc to enable easy visibility of the eye pattern.)

4. Put the disc (YEDS-18) and press NX button.

From focus searching, focus is turned ON while entering CLV drawing-in mode. Tracking and sled are turned OFF.

5. Press the NX button. [Both tracking and sled are turned ON.]

6. Adjust RV701 so that the oscilloscope waveform is as shown in the figure below (eye pattern). A good eye pattern means that the diamond shape (≈ ) in the center of the waveform can be clearly distinguished.

7. Release the test mode after adjustment is completed.

Focus T racking/Gain Adjustment

A frequency response analyzer is necessary in order to perform this adjustment exactly. However, this gain has a margin, so even if it is slightly off, there is no problem. Therefore, do not perform this adjustment. Focus Tracking/gain determines the pick-up follow-up (vertical and horizontal) relative to mechanical noise and mechanical shock when the 2-axis device operate. However , as these reciprocate, the adjustment is at the point where both are satisfied.

•When gain is raised, the noise when the 2-axis device operates increases.

•When gain is lowered, mechanical shock and skipping occurs more easily.

•When gain adjustment is off, the symptoms below appear.

Symptoms

• The time until music starts becomes longer for STOP → NX button or automatic selection. (., > buttons pressed.) (Normally takes about 2 seconds.)

• Music does not start and disc continues to rotate for STOP → NX button or automatic selection. (., > buttons pressed.)

• Sound is interrupted during PLAY. Or time counter display stops progressing.

Gain

Focus Tracking

low

low or

high

–low

• RF signal reference waveform (eye pattern)

VOLT/DIV: 0.2 V (with the 10: 1 probe in use) TIME/DIV: 500 ns

1.2 ± 0.2 Vp-p

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

Adjustment Location: MAIN board (See page 18)

• More noise during 2-axis device operation

high high

The following is a simple adjustment method.

– Primary Adjustment –

Note: Since exact adjustment cannot be performed, remember the posi-

tions of the controls before performing the adjustment. If the positions after the primary adjustment are only a little different, return the controls to the original position.

Connection:

oscilloscop

(DC range)

Solder bridge (TRACKING)

Solder bridge (FOCUS)

TP (VC)

+ –

CFD-CD777SMK2

Procedure:

1. Keep the set horizontal. If the set is not horizontal, this adjustment cannot be per-

(

formed due to the gravity against the 2-axis device.

2. Put the disc (YEDS-18) and press NX button.

3. Connect the oscilloscope to solder bridge (FOCUS) and TP

(VC) on MAIN board.

4. Adjustment RV702 on MAIN board so that the waveform is

as shown in the figure below. (FOCUS gain adjustment)

VOLT/DIV: 100 mV TIME/DIV: 2 ms

100 mV 0 V

• Incorrect Examples (DC level changes more than on adjusted

waveform)

low focus gain

VOLT/DIV: 100 mV TIME/DIV: 2 ms

• Incorrect Examples (fundamential wave appears)

low tracking gain

)

high tracking gain high fandamential wave than for low gain

VOLT/DIV: 1 V TIME/DIV: 2 ms

0 V

)(

VOLT/DIV: 1 V TIME/DIV: 2 ms

0 V

200 mV

0 V

high focus gain

5. Connect oscilloscope to solder bridge (TRACKING) and TP

(VC) on MAIN board.

6. Adjust RV704 on MAIN board so that the waveform is as

shown in the figure below. (Tracking gain adjustment)

VOLT/DIV: 100 mV TIME/DIV: 2 ms

75 mV

0 V

VOLT/DIV: 1 V TIME/DIV: 2 ms

0 V

CFD-CD777SMK2

Adjustment Location:

– MAIN BOARD (Component Side) –

RV703 E-F Balance Adjustment

RV701 Focus Bias Adjustment

RV704 Tracking Gain Adjustment

RV702 Focus Gain Adjustment

IC703

– MAIN BOARD (Conductor Side) –

IC701

(FOCUS)

TP (VC)

(TRACKING)

6-1. BLOCK DIAGRAM – TUNER Section –

CFD-CD777SMK2

SECTION 6

DIAGRAMS

ANT1

FM/SW

TELESCOPIC

ANTENNA

S1 (7/8)

BAND

SW2

SW1

CT5, L5

SW1 TRACKING

CT7, L7

SW2 TRACKING

MW FERRITE-ROD

ANTENNA

CT3, L3

MW TRACKING

L5 SW1 ANT

L7 SW2 ANT

CT3

CT5

CT7

B.P.F.

FL1

S1 (8/8)

S1 (6/8)

S1 (5/8)

BAND

SW2

SW1

TU REG

B+

CT4, L4

MW FREQUENCY

COVERAGE

CT8, L8

SW2 FREQUENCY

COVERAGE

CV3

CT6, L6

SW1 FREQUENCY

COVERAGE

FM RF

CT1, L1

FM TRACKING

MW OSC

SW2 OSC

SW1 OSC

S1 (3/8)

CF3

CV1

CT1

S1 (2/8)

BAND

SW2

SW1

FRONT-END

AM OSC

24 22

CV4

FM RF IN

AM RF IN

CT4

CT8

CT6

S1 (4/8)

FM/AM

FM OSC

CV2

CT2

CT2, L2

FM FREQUENCY

COVERAGE

FINE TUNIG

CONTROL

OUT

16 13

AM IF

TU REG

B+

FM OSC

RV1

FINE TUNING

CF1, 2

REG OUT

CF4

REGURATOR

BAND

SELECT

BAND

SELECTOR

FM IF IN

AM IF IN

VCC

PD1

PD2

DET LPF

FM IF/

DISCRI

AM IF/

DET

FM DISCRI

PILOT

1/2

COUNTER

1/2

COUNTER

PLL

LPF

L.P.F.

S305 (2/2)

ISS, FM MODE

MONO (3)

ST (2)

ST (1)

FM/AM FRONT-END,

FM/AM DET, MPX

IC1

DECORDER

AMP

SWITCH

VCO

PLL

LPF

2729123

VCO

L-CH

OUT

R-CH

OUT

ST IND

FM VCO

Q4, 5, 7, 8

D328

FM STEREO

RV2

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH : FM

: AM

TUNER L-CH

R-CH

MUTING

TUNER MUTE

FUNCTION

MUTING SWITCH

TUNER B+

(Page 21)

(Page 22)

S1 (1/8)

BAND

SW2

SW1

1919

CFD-CD777SMK2

6-2. BLOCK DIAGRAM – CD Section –

DETECTOR

OPTICAL PICK-UP

(KSS-213R)

LASER DIODE

I-V

AMP

DIGITAL

CLV

MON

MDP

32 4

FILTER

7 12 9 8

FILO

CLTV

PCO

FILI

DIGITAL PLL

MDS

SQSO

SQCK

46 47 49 51 53 52 43 44

DEMODULATOR

SUB-CODE

PROCESSOR

CPU

INTERFACE

SENS

DATA

CLOK

EFM

XLAT

SCOR

SBSO

CLOCK

GENERATOR

INTERNAL BUS

SPOA

ON: When the optical pick-up is

inner position.

D/A

INTER-

FACE

16k

RAM

ERROR

CORRECTOR

S702

(LIMIT)

XTAI

XTAO

PCMD

BCK

LRCK

MUTE

EMPH

GFS

X701

16.9344MHz

21 22 20

DIGITAL FILTER, D/A CONVERTER

DATA

BCK

LRCK

MUTE

EMPH

IC704

RSTN

MUTING

Q705, 706

MUTING

CONTROL SWITCH

Q702, 704

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: CD

CD L-CH

R-CH

(Page 21)

RF AMP,

FOCUS/TRACKING/SLED SERVO

RV703

E-F BALANCE

POWER CONTROL

RV701

FOCUS BIAS

AUTOMATIC

Q701

PD1

PD2

FE BIAS

RF AMP

F I-V AMP

E I-V AMP

AMP

IC701

SUMMING

FOCUS ERROR

AMP

TRACKING

ERROR

AMP

FEO

TEO

FOCUS GAIN

RFO

RFI

FOCUS OK

COMPARATOR

MIRR

AMP

DEFECT

AMP

RV702

RV704

TRACKING

GAIN

TTL

IIL

FEI

FOCUS PHASE

COMPENSATION

TEI

TRACKING PHASE

COMPENSATION

SLO SL+

SLED

FOCUS OK

AMP

L DATA REGISTER

AMP

FEO

TEO

TTL

FOK

DATA

CLK

XLT

C.OUT

XRST

SENS

20 22

24 23

IIL

DIGITAL SIGNAL

PROCESSOR, CLV SERVO

IC702

ASYMMETRY

CORRECTION

FOK

DATO

CLKO

XLTO

SEIN

CNIN

XRST

SEQUENCER

SERVO AUTO

M901

(SPINDLE)

LASER ON SWITCH

Q703

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

2-AXIS

DEVICE

(FOCUS)

SP+

SP–

(TRACKING)

SPINDLE

MOTOR

DRIVE

TRK+

TRK– FCS+

FCS–

M902

(SLED)

SPIN

T+

T–

F+

F–

SL+

SL–

SPO

IC703

TRACKING

COIL DRIVE

FOCUS

COIL DRIVE

SLED MOTOR

DRIVE

SPINDLE MOTOR

DRIVE

TIN

FIN

SLIN

SPI

MUTE

RST

D704

LDON

XRST

RST

EXTAL

X702

4.019MHz

8 5 3 11 9 10 4

SENS

SQSO

SQCKO

COM0 – COM3

XTAL

XLAT

DATA

CLOK

SCOR

54 – 51 50 – 37

LIQUID CRYSTAL DISPLAY

SEG0 – SEG13

LCD801

SYSTEM CONTROLLER, LCD DRIVER

IC801

MODE20DISP

K-PLAY

S801 – S806

K-STOP23K-FR

C-MUTE

K-FF

RMC-S

REMOTE CONTROL

RECEIVER

IC851

(CD LID OPEN/CLOSE DET)

(ON: When the CD lid is closed)

REC

DOOR

S701

REC

(Page 21)

2020

6-3. BLOCK DIAGRAM – MAIN Section –

MIC301

MIC

J302

MIX MIC

J303

TV/LINE IN

(Page 22)

MUTING

CONTROL SWITCH

Q314

MUTING Q101, 110, Q201, 210

R-CH

CFD-CD777SMK2

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH : FM

: CD

: TAPE PLAY (DECK A)

: TAPE PLAY (DECK B)

: TAPE REC (DECK B)

: MIC INPUT

(Page 19)

(Page 20)

DECK A

DECK B

Q330, 335

SWITCHING

(Page 20)

L-CH

R-CH

L-CH

R-CH

HP601

(PB)

HRP601

(REC/PB)

HE601

(ERASE)

TUNER L-CH

CD L-CH

Q335

REC

R-CH

VREF

S304 (1/4)

REC/PB

T301

BIAS OSC

Q330

ISS, FM MODE

REC

AU +7.5V

S305 (1/2)

REC/PB EQ AMP,

FUNCTION SWITCH, AGC,

REC BIAS OSC

A-DECK-L

B-DECK-L

TR-C

TR-B

1 (ST)

AU +7.5V

2 (ST)

3 (MONO)

IC101

TAPE

NF-L

TV-IN-L

RA-IN-L

INPUT

SELECT

SWITCH

TAPE

OUT-L

3 27 28

AMP

REC

EQ AMP

N.F.

CD-IN-L

CIRCUIT

FUNCTION

AGC

S304 (4/4)

REC/PB

REC

S601

(DECK B PLAY)

S304 (3/4)

REC/PB

REC PB

91012

MIC-IN

MIC

AMP

A/B

NS/HS

REC MUTING

R-CH

HIGH SPEED

AU +7.5V

Q305

OFF

S303

DUBBING

MIC/HS

R-CH

LOGIC

CIRCUIT

OUT-L

OUT-R

SWITCH

CONTROL

S605

(DECK A PLAY)

TV/LINE IN

RADIO

DUBBING

TAPE

(CD/RADIO OFF)

S302 (2/3) FUNCTION

LINE

GRAPHIC EQUALIZER AMP

IC102

L-IN

R-IN

29dB 29dB

LEVEL METER

LED DRIVE

OUT1 – OUT5

1 – 4, 6

D101 – 105

(L-CH LEVEL METER)

RV302

TAPE SEPPED

(NORMAL)

NORMAL/HIGH

SPEED CONTROL

Q307, 308

LINE1

8815

IC104

15dB

LINE2

R-CH

MOTOR B+

EQUALIZER

CONTROL

BAL

1, 2, 20 – 22

RV303

BALANCE

M601

(CAPSTAN/REEL)

GRAPHIC

D301 – 305

D306 – 320

5BAND GRAPHIC

EQUALIZER

L-OUT

R-OUT

VOL

SWITCHING

Q313

DSS

SWITCHING

Q301

MUTING SWITCH

Q304

D322

RV301

VOLUME

D329 – 332

S301 (1/2)

PRESET MODE

MANUAL

DISCO

PARTY

LIVE

AGC

Q312

D329

LIVE

D330

PARTY

BUFFER

Q302, 303

DISCO

MANUAL

COM +5V

S301 (2/2)

PRESET MODE

MANUAL

DISCO

PARTY

LIVE

D331

D332

L-CH

R-CH

(Page 22)

2121

+ 47 hidden pages

Sony CFDCD-777-S Mk2 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

rear cabinet section

tape mechanism deck block section

cassette holder

CD block section

optical pick-up section

main board

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

TAPE DECK SECTION 0 dB=0.775 V

TUNER SECTION 0 dB=1 µV

CD SECTION

6-1. BLOCK DIAGRAM – TUNER Section –

DIAGRAMS

6-2. BLOCK DIAGRAM – CD Section –

6-3. BLOCK DIAGRAM – MAIN Section –