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HCD-W550
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
SERVICE MANUAL
STEREO CASSETTE DECK CD PLAYER
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.
SPECIFICATIONS
· 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.


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TABLE OF CONTENTS
SERVICING NOTE
· 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)
1.
GENERAL ······································································ 3
2.
DISASSEMBLY
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.
ADJUSTMENTS
3-1.
Mechanical Adjustment ······················································ 6
3-2.
Electrical Adjustment ························································· 6
4.
DIAGRAMS
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.
EXPLODED VIEWS
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
6.
ELECTRICAL PARTS LIST ··································· 49


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SECTION 1
GENERAL
1 23
456
7
8
9
!TM
!
@TM
@
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)
!TM 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)
@TM 0 Button [A] (DECK)
@£ Button [A] (DECK)
@¢ ª Button [A] (DECK)
@ · Button [A] (DECK)


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SECTION 2
DISASSEMBLY
Note :
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.
2-1.
BACK PANEL, CD BLOCK REMOVAL
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
2-2.
CASSETTE LID (A)/(B) ASSY, MECHANISM DECK REMOVAL
1
Press the EJECT button and open the cassette lid.
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


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2-3.
MAIN BOARD, RESISTOR BOARD, FRONT PANEL ASSY REMOVAL
3 Screw
+BVTP 3
× 8
2 Front panel assy
6 Screw
+BVTP 3
× 8
1 Screw
+BVTP 3
× 8
4 Bracket (H/S)
5 Resistor board
7 Main board
· Tray (Slide) getting out procedure on the power supply is OFF
Rotate the BU CAM assembly in the direction of the arrow and pull out the slide.
Tray (Slide)
1
BU CAM assy