Sony MCEF-808-K Service manual

MCE-F808K

SERVICE MANUAL

Ver 1.1 2002. 08

Model Name Using Similar Mechanism NEW
CD Mechanism Type DECK ASSY
Base Unit Type PU BASE
Optical Pick-up Type PICK-UP ASSY

E Model

SPECIFICATIONS

System VIDEO CD player
Laser Semiconductor laser (λ=780nm for CD)

Signal format system NTSC, PAL
Playable discs VIDEO CD, audio CD, MP3 disc
Frequency response 20 Hz to 20 kHz (±1.0 dB)
Signal-to-noise ratio More than 90dB
Outputs

VIDEO OUT (Phono jacks) 1.0 Vp-p 75 ohms, sync negative
AUDIO OUT (Phono jacks) Impedance 47 klilohms, Rated input 2 Vrms

Input

MIC 1, MIC 2 (Phone jacks) 100 mVp-p, 600 ohms

General

Power requirements 220-240 V AC, 50/60 Hz
Power consumption 10W
Dimensions (approx.) 430 × 97.5 × 265 mm (w/h/d) incl. projecting parts
Mass (approx.) 2.8 kg

Supplied accessories

Audio connecting cord (1)
Video connecting cord (1)
Remote commander (remote) RMT-F808V (1)
R6 (size AA) batteries (2)

Design and specifications are subject to change without notice.

Emission duration: continuous

Load impedance over 10 kilohms

9-874-041-02

2002H1600-1
© 2002.08

VIDEO CD PLAYER

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

MCE-F808K

TABLE OF CONTENTS

1. SERVICING NOTE·····················································

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

3. DISASSEMBLY ·························································· 5

3-1. Top Cabinet ··································································· 6
3-2. VCD Door, Front Panel Section ··································· 6
3-3. CD Mechanism Deck (DECK ASSY) ·························· 7
3-4. MAIN Board, TOTAL Board········································ 7
3-5. FRONT Board, C/SKD Board ······································ 8
3-6. Disk Tray ······································································ 8
3-7. Loading Belt, CD Pwb Assy (Loading) ························ 9
3-8. Pick-Up Assy ································································ 9

4. TROUBLESHOOTING················································· 10

4-1. CD Section ·································································· 10
4-2. MPEG Part Troubleshooting······································· 15

5. DIAGRAMS······································································ 29

5-1. Circuit Boards Location ·············································· 29
5-2. Block Diagrams

– BD Section – ···························································· 30
– MPEG Section – ······················································ 31

– MAIN Section – ······················································· 32
5-3. Printed Wiring Board – MAIN/PANEL Section – ······ 33
5-4. Schematic Diagram – MAIN/PANEL Section – ········ 34
5-5. Printed Wiring Board – TOTAL Section – ················· 35
5-6. Schematic Diagram – TOTAL Section – ···················· 36
5-7. IC Block Diagrams ····················································· 37
5-8. IC Pin Functions ························································· 39

6. EXPLODED VIEWS ······················································ 44

6-1. Cabinet and MAIN FRAME Section ·························· 44
6-2. CD Mechanism Section ·············································· 45

7. ELECTRICAL PARTS LIST ······································· 46

3

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.

The following caution label is located inside the unit.

CAUTION

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

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be
damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270˚C
during repairing.

• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering
or unsoldering.

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
repain 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 pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
The emission check enables continuous checking of the S curve.

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 three times.

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.

2

SECTION 1

SERVICING NOTE

[HOW TO OPEN THE DISC TRAY WHEN THE MAIN POWER TURNS OFF]

1. Open the top cabinet. (Refer to Section 3-1 “Top Cabimet”)

2. Remove the connector from PN807 on the TOTAL board.

3. Supply +2.8V dc by the unit of DC regulated supply to the connector as shown below.

4. Open the tray in the direction of the arrow.

connector
(PN807)

MCE-F808K

GND

+2.8V

BLUE

3

MCE-F808K

SECTION 2

GENERAL

This section is extracted
from instruction manual.

17 16 15

1

POWER indicator

2

3

button

4

button

5

ECHO button

6

OPEN/CLOSE button

7

SELECT button

5421 3

button

10

PCB ON/OFF switch

11

RETURN switch

12

REPEAT switch

13

14

15

16

NEXT button

PREV button

MIC LEVEL control

MIC 2 jack

109876

121314 11

8

button

9

button

This Player Can Play the
Following Discs

VIDEO CDs Audio CDs

Discs logo

Contents Audio + Video Audio

(moving pictures)

Disc size 12 cm/ 8 cm 12 cm/8 cm

z

The VIDEO CD Player can play MP3 format
recordings on CD-ROM, CD-R or CD-RW
discs. see page 21.

Note on VIDEO CDs

This player conforms to Ver. 1.1 and Ver. 2.0 of

VIDEO CD standards. You can enjoy two kinds of

playback according to the disc type.

17

MIC 1 jack

4

Note : Disassemble the unit in the order as shown below.

MCE-F808K

SECTION 3

DISASSEMBLY

SET

TOP CABINET

VCD DOOR,
FRONT PANEL SECTION

DISK TRAY PICK-UP ASSY

CD MECHANISM DECK
(DECK ASSY)

FRONT BOARD,
C/SKD BOARD

LOADING BELT,
CD PWB ASSY (LOADING)

MAIN BOARD,
TOTAL BOARD

5

MCE-F808K

)

Note : Follow the disassembly in the numerical order given.

3-1. T op Cabinet

7

two screws

2

(case 3 TP2)

5

top

cabinet

6

1

four screws

(case 3 TP2)

3

(case 3 TP2

4

two screws

3-2. VCD Door, Front Panel Section

2

VCD door

1

Push

OPEN/CLOSE
button.

5

(PN102)

3

volume knob

connector

9

claw

8

three claws

qa

6

two claws

4

connector

(PN103)

7

claw

q;

front panel

section

6

3-3. CD Mechanism Deck (DECK ASSY)

)

1

(TP 3

2

connector

(PN807)

three

screws

×

10)

5

CD mechanism deck (DECK ASSY

4

wire (flat type)

3

connector

(PN803)

MCE-F808K

3-4. MAIN Board, TOTAL Board

6

MAIN board

1

(3

six

screws

×

8)

3

(flat type)

wire

5

connector

(PN813)

4

connector

(PN501)

8

two

screws

(3

×

8)

7

screw

(TP 3

×

16)

9

TOTAL board

2

screw

(TP 3

×

10)

7

MCE-F808K

d

y

3-5. FRONT Board, C/SKD Board

7

select knob

front panel

4

lens, power

3

power knob

2

FRONT boar

1

three

(TP 3

screws

×

10)

3-6. Disk Tray

6

C/SKD board

4

clamp holder

5

five

(TP 3

screws

×

10)

1

two

screws

(b-tite)

5

disk tra

2

claw

3

claw

8

3-7. Loading Belt, CD Pwb Assy (Loading)

r

1

loading belt

3

pulley gear

4

loading gear

2

6

7

CD pwb assy (loading)

MCE-F808K

claw

claw

3-8. Pick-Up Assy

7

damper rubber

6

2

screw

(2.6

5

two

screws

(D 2.0 × 6)

damper rubber

×

10)

1

two

(2.6

screws

×

10)

8

pick-up assy

3

screw

(2.6

4

damper rubber

5

damper rubbe

×

10)

9

MCE-F808K

4-1. CD Section

SECTION 4

TROUBLESHOOTING

CD PART

CD Function Select

Is power turned ON?

YES

Does initial reading occur?

YES

Can disc be played?

YES

Is audio output supplied?

NO

Check power supply circuitry.

NO

Check laser circuitry.

Check focusing circuit.

Check disc.

NO

Check tracking servo circuitry.

NO

Check Audio circuitry.

10

YES

OK

• If initial reading is not carried out (with disc)

Does disc motor rotate?

YES

NO

MCE-F808K

Is RF waveform
output?

RFO

IC501 Pin

15

Is tracking servo

NO

operating?
Is the lower enve­lope of RFO
waveform flat?

YES

Does laser light?

YES

Is signal output at

NO

(TEO)?

1.3V

YES

Is signal output at tracking output
IC503 Pin , ?

PN801 Pin , waveform.

35

14 15

36

YES

NO

Is signal output, at

NO

IC501 Pin ?

YES

NO

(See page 12)

A

(See page 13)

B

• IC501 defective.

16

(FEO)

NO

• Connector
defective.

• Pick-up
defective.

• Pattern defective.

• IC501 or IC502 defective.

Is rotation normal?
Is there any irregularity in
frequency?

YES

Is HF signal normal without
dropout?

YES

Does IC502 Pin (GFS) as

NO

figure?

NO

• Pick-up defective.

• Connector defective.

57

NO

• IC502 defective.

• Disc initial reading damaged or
defective.

• Disc defective.

11

MCE-F808K

A

When laser does not light.

Is below signal “L” at PN806

10

Pin (LDON)?

YES

NO

Has Pick-up returned to the
innermost position?

YES

Does Voltage
appear at PN
806 Pin
(LOW) & Pins

5

3

, (High)?

NO

Does pick-up stop after having
moved to the innermost position?

PN 803 LMT SW

Are data transferred from

NO

IC301 Pin , , .

94

91

93

YES

Is below signal output at IC503

29

Pin ?

YES

4

YES

NO

• IC301 Defective.

NO

• IC502, 503 defective.

• Slide motor defective.

• Connector defective.

IC301 Defective.

Are detect output input at PN806

9

Pin ?

• LMT SW defective.

• Connector defective.

NO

OPEN

CLOSE

Does fenerate about 2.4V at
IC501 Pin LD?

1

YES

Has laser power source returned
to Q501(Q501 collector voltage
about 1.8V)

YES

Flow laser current?
Both voltage of R501 is about

0.4V?

NO

NO

NO

YES

R501 >> 0.4V

R501 << 0.4V

YES

YES

• IC503 defective.

• IC501 defective.

• Surrounding circuitry defective.

• Connector defective.

• Q501 defective, connector
defective.

• Laser defective.

• Laser defective.

• Connector defective, short etc.

12

B

When laser lights.

MCE-F808K

Do lenses move up and down?

YES

lnsert disc and
in the case of
check of initial
leading.

Is RFO signal waveform output?
IC501 Pin .

15

YES

NO

Is signal output at focus search
terminal?

IC501 pin (FEO)

16

YES

Is signal output at PN801 Pin ,

16

?

YES

NO

NO

• IC501 defective.

• FOCUS Line short.

13

NO

• IC503 defective.

• Actuator short.

• Connecotr short.

• Connector short.

• IC501 defective.

The waveform of RFO is below
figure?

Amplitude

0.7~1.5V

YES

Is FOK signal output?
IC502 Pin .

92

YES

Is FOK signal input to IC301

71

Pin

NO

NO

NO

• Turntable height error.

• Laser diode degraded.

• IC502 defective.

• Pattern defective.

•PN806 defective.

YES

(See page 14)

C

13

MCE-F808K

C

YES

Is RFO signal output?
IC501 Pin .

Is FZC signal output at IC501
Pin ?

(SENSE)

Is MDP signal outut by IC502
Pin ?

16

YES

82

FER

ISTAT

YES

95

• IC501 defective.

NO

• Pick-up defective.

• Connector defective.

NO

• IC502 defective.

When FOK focus
Servo Conform by
FZC signal

YES

Has voltage at disc motor?

at start

YES

NO

NO

• IC502 defective.

• IC501, 502 defective.

• Surrounding circuitry defective.

• Disc Motor defective.

• Connector defective.

14

4-2. MPEG Part Teoubleshooting

Does DC - 33V appear at

PN302 Pin .

END

Dose -33V appear at

ZD704(-)

Check the Q704

TURN ON

Check the -33V (LOW)

of C769(-)

Reper to

Power Circuit

END

YES

YES

YES

NO

NO

NO

28

• MPEG PART

MCE-F808K

1. Is power supplied to MPEG PART IC (2.8V, 5V)

1) 5V : IC801, IC802 pin 81,IC803, IC804

2) 2.8V : IC802 pins 1, 31 ,51

2. NO VIDEO

1) check the 27 MHz (X801)

2) check the MPEG RESET

- IC 801 pin 13, 24, IC802 pin 29

3) check the communication line [FRONT MICOM (IC301) MPEG
(IC802)]

- DATA, ACK, STROBE (IC802 pin 45, 46, 47)

4) check the CLOCK & DATA [DSP(IC502) MPEG (IC802)]

- LRCK, BCK, DATA (IC802 pin 96, 97, 98)

5) check the DATA communication

- check the DATA & CLOCK LINE (IC801, 802, 803, 804)

6) check the VIDEO signal of the IC801 pin 64

- check the normal voltage (IC 801 pin 52, 54, 55, 65)

7) check the COLOR & OSD

- check the DATA (IC801 pin 79, 80, 82, 84)

• P-SENS PART

Does 5V appear at ZD703?

NO

Check the waveform

YES

Check the pattern of

IC301 Pin .

11

Check the R768 and

replace ZD703.

3. NO AUDIO

1) check the 16.9344MHz (X531)

2) check the CLOCK & DATA of DSP (IC 502)

- LRCK, BSK, DATA (IC502 pin 47, 48, 49)

3) check the AUDIO signal (IC801 pin 45, 46, 47, 48)

4) check the Vcc input of IC806 (OPAMP)

5) check the power on of MUTE part

- check the Q801, 802

4. miscellaneous

1) check the communication line between IC802 pin 48, 52, 54
and FRONT MICOM

2) check the MIC input to IC801 Pin 49, 50

of D703 (+).

YES

NO

Replace the D703

• VKK PART

15

MCE-F808K

• Power Circuit (Power Circuit)

Check the Fuse

YES

NO

Replace the Fuse

Check the DC output

of C777(+), C778(-)

YES

Check the DC power

input of IC704

YES

Check the DC power output of

IC703 Pin 6, 24

YES

Check the DC power (12V)

of IC705

YES

Check the 5V of IC706 Pin 2

(CD FUNCTION)

NO

NO

NO

NO

Check the AC output of CN701 Pin 1, 5

YES

Replace the D720

Check the AC output of

CN701 Pin 7, 10

YES

Check or Replace the D708,D709,

D706, D707, D757, D758.

Check or Replace the

D702, D701

Check the “high” of D791(+)

YES

Replace the IC705

NO

Replace the Transformer

NO

Replace the Transformer

NO

Check the Voltage of

IC301 Pin 84

YES

END

• Muting Circuit (MUTE)

Dose “High” appear at Q701,

Q751, Q251, Q201, “B”

YES

check the “Low” of Q701,

Q751, Q251, “C”

YES

NO

NO

NO

Check the “high” of D792(+)

YES

Replace the IC706

Refer to “IC 203 Troubleshooting

(ONLY Q201/251)

Check the “high” of the Q702

“E” (ONLY Q701/751)

YES

Replace the Q702

NO

NO

Refer to IC203, IC552,

Troubleshooting

Refer to IC 301

Troubleshooting

16

MUTE