SONY HCD-W550 SERVICE MANUAL
HCD-W550
SERVICE MANUAL
• HCD-W550 is the deck, CD section
in MHC-W550/W770AV.
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the doub le-D symbol a are trademarks
of Dolby Laboratories Licensing Corporation.
CD
Section
Tape deck Model Name Using Similar Mechanism HCD-GR5/RX50
Section T ape Tr ansport Mechanism Type TCM-220WR2E
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
Model Name Using Similar Mechanism HCD-GR8/RX90
CD Mechanism Type CDM38-5BD29A
Base Unit Name BU-5BD29A
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
SPECIFICATIONS
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.
MICROFILM
STEREO CASSETTE DECK CD PLAYER
TABLE OF CONTENTS
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
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]
FH-E939,838,737,
MHC-6600,5600,
CDP/TC
PFJ-1
(Power Supply Jig)
POWER SW
Connector Cable 17P
(Supplied with set)
Conversion Board
(J-2501-138-A)
Set
CNB108 17P
SYSTEM CONTROL
— 2 —
SECTION 1
GENERAL
123 456 7
8
9
@∞
@¢
@£
@¡
@™
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)
!ª
@º
!º
!¡
!™
!¶
!•
!¢ 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)
!∞
!§
!£
!¢
— 3 —
SECTION 2
0
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. BACK PANEL, CD BLOCK REMOVAL
8
CD block
7
Screw
+BVTP 3
×
10
CASE
Unscrew the fiv e case attachment in the screws (case)
(M3 × 8) × 4, (+BV 3 × 8) × 1 and remove the case.
2
Back panel
1
Screw
+BVTP 3
×
1
6
Screw
+BVTP 3
2-2. CASSETTE LID (A)/(B) ASSY, MECHANISM DECK REMOVAL
1
Press the EJECT button and open the cassette lid.
Mechanism Deck (TCM-220WR2E)
7
+BVTP 2.6
5
Screw
3
4
CN112 (9 pin)
CN111 (8 pin)
×
10
×
8
1
Screw
+BVTP 3
Flat wire (19 core)
2
×
10
1
3
1
8
6
Screw
+BVTP 3
— 4 —
4
Flat wire (11 core)
5
Flat wire (21 core)
×
8
2-3. MAIN BOARD, RESISTOR BOARD, FRONT PANEL ASSY REMOVAL
d
3
Screw
2
Front panel assy
+BVTP 3
1
+BVTP 3
Screw
×
8
6
Screw
+BVTP 3
×
8
4
Bracket (H/S)
5
Resistor board
×
8
7
Main boar
• 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)
— 5 —
1
BU CAM assy
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENT
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
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.
• T orque Measurement
Mode Torque Meter Meter Reading
Forward CQ-102C
Forward
Back Tension (0.028 – 0.083 oz•inch)
Reverse CQ-102RC
Reverse
Back Tension (0.028 – 0.083 oz•inch)
FF, REW CQ-201B
CQ-102C
CQ-102RC
36 to 61g•cm
(0.50 – 0.84 oz•inch)
2 to 6g•cm
36 to 61g•cm
(0.50 – 0.84 oz•inch)
2 to 6g•cm
61 to 143g•cm
(0.85 – 1.99 oz•inch)
3-2. ELECTRICAL ADJUSTMENT
DECK SECTION
1. The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
2. The adjustment and measurement should be performed for both
L-CH and R-CH.
• Switch position
DOLBY NR switch : OFF
FUNCTION button : OFF
EFFECT switch : OFF
DBFB switch : OFF
3. Deck section electrical adjustments are made in test mode by
press key switch same time CD STOP DECK A ST OP and
DECK B STOP button.
4. Input point and output level measurement point.
• T ape Tension Measurement
Mode Tension Meter Meter Reading
Forward CQ-403A
Reverse CQ-403R
more than 100 g (3.53 oz)
more than 100 g (3.53 oz)
• Test Tape
Tape Signal Used for
P-4-A100 10 kHz, –10 dB
P-4-L300 315 Hz, 0dB Level Adjustment
WS-48B 3 kHz, 0dB Tape Speed Adjustment
0 dB=0.775V
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Procedure:
1. Forward Playback mode
Reverse Playback mode
Head Azimuth Adjustment
— 6 —
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