DOWNLOAD Sony HCD-W550 / MHC-W550 / MHC-W770AV Service Manual ↓ Size: 850.94 KB | Pages: 31 in PDF or view online for FREE

MICROFILM

CD

Model Name Using Similar Mechanism

HCD-GR8/RX90

Section

CD Mechanism Type

CDM38-5BD29A

Base Unit Name

BU-5BD29A

Tape deck

Model Name Using Similar Mechanism

HCD-GR5/RX50

Section

Tape Transport Mechanism Type

TCM-220WR2E

Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol 

a

 are trademarks

of Dolby Laboratories Licensing Corporation.

• HCD-W550 is the deck, CD section

in MHC-W550/W770AV.

CD player section
system

Compact disc and digital
audio system

Laser

Semiconductor laser
(l = 780 mm)
Emission duration :
continuous

Laser output

Max. 44.6 mW*
*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

2Hz - 20 kHz (± 0.5dB)

Wavelenght

780 - 790 mm

Signal to noise ratio

More than 90 dB

Dynamic renge

More than 90 dB

CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength

600 mm

Output Level

- 18 dBm

Tape player section
Recording system

4 track 2 channel stereo

Frequency response

60 - 13,000 Hz (± 3dB),

(DOLBY NR OFF)

using Sony TYPE I
cassette
60 - 14,000 Hz (± 3 dB),
using Sony TYPE II
cassette

General
Dimensions (w / h / d)Approx. 280 ¥ 205 ¥ 359

mm

Mass

Approx. 4.3 kg

Design and specifications are subject to change without
notice.

— 2 —

• Supplying power during servicing

This equipment cannot operate without using a separate power supply. Connect to the STR-W550/W770AV when performing service
work.
To apply power set the SYSTEM POWER switch on the Tuner/Amp to ON.
When other units are not available use the PFJ-1 power supply jig.
When using the PFJ-1, simultaneously press the CD STOP button and the DECK A 

) (fast rightward) button to turn on the power.

[Connection Diagram]

PFJ-1

(Power Supply Jig)

POWER SW

FH-E939,838,737,
MHC-6600,5600,
CDP/TC

Connector Cable 17P
(Supplied with set)

Set

CNB108 17P
SYSTEM CONTROL

Conversion Board

(J-2501-138-A)

······································································ 3

2-1.

Back Panel, CD Block Removal ········································· 4

2-2.

Cassette Lid (A)/(B) Assy, Mechanism Deck  Removal ···· 4

2-3.

Main Board, Resistor Board, Front Panel Assy Removal ·· 5

3-1.

Mechanical Adjustment ······················································ 6

3-2.

Electrical Adjustment ························································· 6

4-1.

Block Diagram ································································· 11

4-2.

Circuit Boards Location ··················································· 13

4-3.

Schematic Diagram — Audio Section — ························· 14

4-4.

Printed Wiring Board — Audio Section — ······················ 17

4-5.

Printed Wiring Board — BD Section — ·························· 19

4-6.

Schematic Diagram — BD Section — ····························· 21

4-7.

Printed Wiring Board — Motor Section — ······················ 23

4-8.

Schematic Diagram — Motor Section — ························ 25

4-9.

Schematic Diagram — Panel Section — ························· 27

4-10. Printed Wiring Board — Panel Section — ······················· 29
4-11. Printed Wiring Board — Main Section — ······················· 32
4-12. Schematic Diagram — Main Section — ·························· 35
4-13. IC Block Diagrams ··························································· 38
4-14. IC Pin Function ································································ 40

5-1.

Main Section ····································································· 42

5-2.

Front Panel Section ·························································· 43

5-3.

CD Mechanism Deck  Section-1 (CDM38-5BD29A) ····· 44

5-4.

CD Mechanism Deck  Section-2 (CDM38-5BD29A) ····· 45

5-5.

Base Unit Section (BU-5BD29A) ···································· 46

5-6.

Tape Mechanism Deck Section-1 (TCM-220WR2E) ······ 47

5-7.

Tape Mechanism Deck Section-2 (TCM-220WR2E) ······ 48

··································· 49

— 3 —

1 23

4 5 6

7

8
9

!º
!¡

!™

!£

!¢

!∞

!§

!¶

!•

!ª

@º

@¡

@™

@£

@¢

@∞

1

DISC SKIP EX-CHANGE Button (CD)

2 0

 Button (CD)

3 )

 Button (CD)

4

DISC 1 Button (CD)

5

DISC 2 Button (CD)

6

DISC 3 Button (CD)

7 6

 OPEN/CLOSE Button (CD)

8 ·P

 Button (CD)

9 p

 Button (CD)

!º ·

 Button [B] (DECK)

!¡ ª

 Button [B] (DECK)

!™ π

 Button [B] (DECK)

!£ )

 Button [B] (DECK)

!¢ 0

 Button [B] (DECK)

!∞

DIRECTION MODE Button (DECK)

!§

PAUSE Button (DECK)

!¶

REC Button (DECK)

!•

HI-SPEED DUBBING Button (DECK)

!ª

CD SYNCHRO Button (DECK)

@º

DOLBY NR Button (DECK)

@¡ )

 Button [A] (DECK)

@™ 0

 Button [A] (DECK)

@£ π

 Button [A] (DECK)

@¢ ª

 Button [A] (DECK)

@∞ ·

 Button [A] (DECK)

— 4 —

Follow the disassembly procedure in the numerical order given.

CASE
Unscrew the five case attachment in the screws (case)
(M3 

×

 8) 

×

 4, (+BV 3 

×

 8) 

×

 1 and remove the case.

7

 Screw 

    +BVTP 3 

×

 10

1

 Screw 

    +BVTP 3 

×

 10

1

 Screw 

    +BVTP 3 

×

 10

6

 Screw 

    +BVTP 3 

×

 10

5

 CN111 (8 pin)

4

 CN112 (9 pin)

3

 Flat wire (19 core)

8

 CD block

2

 Back panel

1

6

 Screw 

    +BVTP 3 

×

 8

7

 Screw 

    +BVTP 2.6 

×

 8

4

 Flat wire (11 core)

5

 Flat wire (21 core)

Mechanism Deck (TCM-220WR2E)

2

8

1

1

3