DOWNLOAD Sony HCD-W55 / MHC-W55 / MHC-W77AV Service Manual ↓ Size: 593.18 KB | Pages: 29 in PDF or view online for FREE

MICROFILM

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

a

 are trademarks of

Dolby Laboratories Licensing Corporation.

r

HCD-W55 is the deck, CD section
in MHC-W55/W77AV.

AEP  Model

UK  Model

Model Name Using Similar Mechanism

NEW

CD Mechanism Type

CDM38-5BD19

Base Unit Name

BU-5BD19

Model Name Using Similar Mechanism

HCD-H901AV

Tape Transport Mechanism Type

TCM-220WR2

Tape deck

Section

CD

Section

Recording system

4-track 2-channel stereo

Frequency response

(DOLBY NR OFF)
40–13,000 Hz (

±

3 dB),

using Sony TYPE I cassette
40–14,000 Hz (

±

3 dB),

using Sony TYPE II cassette
40–15,000 Hz (

±

3 dB),

using Sony TYPE IV cassette

Wow and flutter

0.1% WRMS 

±

0.3% (DIN)

Design and specifications are subject to change without notice.

System

Compact disc digital
audio system

Laser

Semiconductor laser
(

λ

 =780nm)

Emission
duration : continuous

Laser output

Max 44.6

µ

W*

*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.

Wavelength

780–790 nm

Frequency response

2Hz–20kHz (

±

0.5 dB)

Signal-to-noise ratio

More than 80 dB

Dynamic range

More than 90 dB

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

Wavelength

600 nm

Output  Level

–18 dBm

– 2 –

Specifications ................................................................................... 1

............................................................................... 3

2-1. Front Panel Section Removal ............................................ 4
2-2. CD Block Removal ............................................................ 4
2-3. Cassette LID (A)/(B) Assy,

Mechanism Deck Removal ................................................ 5

3-1. Mechanical Adjustments ................................................... 6
3-2. Electrical Adjustments ....................................................... 6

................................ 11

5-1. Block Diagram ................................................................ 13
5-2. Circuit Boards Location .................................................. 15
5-3. Printed Wiring Boards –Main Section– ........................... 16
5-4. Schematic Diagram–Main Section– ................................ 19
5-5. Schematic Diagram –TC Section– .................................. 23
5-6. Printed Wiring Boards–TC Section– ............................... 27
5-7. Schematic Diagram–CD Section– ................................... 29
5-8. Printed Wiring Boards –CD Section– ............................. 31
5-9. IC Block Diagrams .......................................................... 35

6-1. Chassis Section ................................................................ 38
6-2. Front Panel Section ......................................................... 39
6-3. TC Mechanism Section-1 (TCM-220WR2) .................... 40
6-4. TC Mechanism Section-2 (TCM-220WR2) .................... 41
6-5. CD Mechanism Section (CDM38-5BD19) ..................... 42
6-6. Chassis Section (CDM38-5BD19) .................................. 43
6-7. Base Unit Section (BU-5BD19) ...................................... 44

............................................... 45

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Supplying power during servicing

This equipment cannot operate without using a separate power supply. Connect to the STR-W55/W77AV 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.

PFJ-1

(Power Supply Jig)

POWER SW

Set

connector cable 17P
(Supplied with set)

CN151 17P
SYSTEM CONTROL 1

FH-E939,838,737,
MHC-6600, 5600,
3600, 2600
CDP/TC

– 3 –

This section is extracted from
instruction manual.

– 4 –

 : Follow the disassembly procedure in the numerical order given.

2

Screws
+BVTP 3X 8

3

Front panel assy

CD Block (CMD38-5BD19)

1

Screws
+BVTP 3X 8

3

Screws
+BVTP 3X 8

4

Flat wire (11 core)
to main board CN401 (11 pin)

1

Screws
+BVTP 3X 10

8

CN103 (11 pin)

9

Flat wire (15 core)

0

Front panel section

7

Flat wire (19 core)

6

CN102
(9 pin)

5

Flat wire (21 core)
to main board CN401 (21 pin)

2

Screws
+BVTP 3X 8

Unscrew the five case attachment in the screws (case)
(M3X8) X4, (+BV 3X8) X 1 and remove the case.