CMT-DC1, HCD-DC1 - Sony Audio Service Manual (repair manual)

Model
CMT-DC1 HCD-DC1
Pages
51
Size
4.66 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-dc1-hcd-dc1.pdf
Date

View Sony CMT-DC1 / HCD-DC1 Service Manual online

SERVICE MANUAL
MICRO Hi-Fi COMPONENT SYSTEM
US Model
Canadian Model
AEP Model
UK Model
E Model
HCD-DC1
Ver 1.2  2003.07
9-873-181-03
Sony Corporation
2003G05-1
Home Audio Company
C
 2003.07
Published by Sony Engineering Corporation
SPECIFICATIONS
HCD-DC1 is the Amplifier, CD player, Tape Deck
and Tuner section in CMT-DC1.
Model Name Using Similar Mechanism
HCD-CP100
CD Mechanism Type
CDM55F-K6BD41A
Base Unit Name
BU-K6BD41A
Optical Pick-up Block Name
KSM-213DCP
Optical Pick-up Name
KSS-213D
Model Name Using Similar Mechanism
HCD-CP100
CD
Section
Tape deck
Section
Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 6-ohm loads, both channels driven, from
70 - 20,000 Hz; rated 18 watts per channel
minimum RMS power, with no more than 0.9%
total harmonic distortion from 250 milliwatts to
rated output.
North American model:
Continuous RMS power output (reference):
35 + 35 W
(6 ohms at 1 kHz, 10%
THD)
Total harmonic distortion less than 0.07% (6 ohms at
1 kHz, 18 W)
European model:
DIN power output (rated): 30 + 30 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
35 + 35 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
85 + 85 W
Other models:
The following measured at 230 V AC, 60 Hz
DIN power output (rated): 27 + 27 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
32 + 32 W
(6 ohms at 1 kHz, 10%
THD)
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 23 + 23 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
26 + 26 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
AUDIO IN MD (VIDEO) (phono jacks):
Sensitivity 500/250 mV,
impedance 47 kilohms
Outputs
OPTICAL DIGITAL OUT (CD):
Optical
PHONES (stereo minijack):
Accepts headphones with
an impedance of  8 ohms
or more
SPEAKER:
Passive speaker system,
6 ohms
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(
λ
 = 780 nm)
Emission
duration: continuous
Wavelength
780 - 790 nm
Frequency response
2 Hz - 20 kHz (
±
0.5 dB)
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
50 - 13,000 Hz (
±
3 dB),
using a Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model:
87.5 - 108.0 MHz
(100-kHz step)
Other models:
87.5 - 108.0 MHz
(50-kHz step)
Antenna
FM wire antenna
Antenna terminals
75 ohm unbalanced
Intermediate frequency
10.7 MHz
– Continued on next page –
2
HCD-DC1
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
4
2.
GENERAL
Parts Identification ..........................................................
5
Setting the Time ..............................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
7
3-2. Upper Cover Sub Assy ....................................................
8
3-3. CD Lid .............................................................................
8
3-4. Front Panel Section .........................................................
9
3-5. Tape Mechanism Deck ....................................................
9
3-6. CD Mechanism Deck (CDM55F-K6BD41A) ................ 10
3-7. Base Unit (BU-K6BD41A) ............................................. 10
3-8. Loading Motor Board ..................................................... 11
3-9. Cam (CDM55) ................................................................ 11
4.
TEST  MODE
.............................................................. 12
5.
ELECTRICAL  ADJUSTMENTS
Deck Section ................................................................... 13
CD Section ...................................................................... 14
6.
DIAGRAMS
6-1. Block Diagram  – CD SERVO Section – ....................... 15
6-2. Block Diagram  – MAIN Section – ................................ 16
6-3. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 17
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 18
6-5. Printed Wiring Board  – CD Board – ............................. 20
6-6. Schematic Diagram  – CD Board – ................................ 21
6-7. Printed Wiring Board  – TC Board – .............................. 22
6-8. Schematic Diagram  – TC Board – ................................. 23
6-9. Schematic Diagram   – MAIN Board (1/3) – ................. 24
6-10. Schematic Diagram  – MAIN (2/3)/
LOADING MOTOR/HEADPHONE Boards  – ............. 25
6-11. Schematic Diagram  – MAIN (3/3)/LCD Boards  – ...... 26
6-12. Printed Wiring Boards  – MAIN/LCD/
LOADING MOTOR/HEADPHONE Boards – .............. 27
6-13. Printed Wiring Boards
– SWITCH/I/O SWITCH Boards – ................................ 28
6-14. Schematic Diagram
– SWITCH/I/O SWITCH Boards – ................................ 29
6-15. Printed Wiring Board – POWER Board – ...................... 30
6-16. Schematic Diagram – POWER Board – ......................... 31
6-17. IC Pin Function Description ........................................... 32
7.
EXPLODED  VIEWS
7-1. Upper Cover, Tape Mech Deck Section ......................... 37
7-2. Front Panel Section ......................................................... 38
7-3. Chassis Section ............................................................... 39
7-4. CD Mechanism Deck (CDM55F-K6BD41A) ................ 40
7-5. Base Unit (BU-K6BD41A) ............................................. 41
8.
ELECTRICAL  PARTS  LIST
............................... 42
AM tuner section
Tuning range
North American model:
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,710 kHz
(with the tuning interval
set at 9 kHz)
European model:
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Other models:
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna
AM loop antenna, external
antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
North American model:
120 V AC, 60 Hz
European model:
230 V AC, 50/60 Hz
Mexican model:
120 V AC, 60 Hz
Other models:
110 - 120 V or 220 -
240 V AC , 50/60 Hz
Adjustable with voltage
selector
Power consumption
European model:
See the nameplate
0.5 W (in the standby
mode)
Other models:
See the nameplate
Dimensions (w/h/d)
Approx. 191 
×
 253 
×
346 mm incl. projecting
parts and controls
Mass
Approx. 5.6 kg
Design and specifications are subject to change
without notice.
Ver 1.1
3
HCD-DC1
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
CAUTION
:
INVISIBLE    LASER    RADIATION    WHEN    OPEN    AND
INTERLOCKS   DEFEATED.    AVOID   EXPOSURE   TO   BEAM.
ADVARSEL :
USYNLIG   LASERSTRÅLING   VED   ÅBNING   NÅR 
SIKKERHEDSAFBRYDERE  ER  UDE  AF  FUNKTION.   UNDGÅ  UDSAETTELSE 
FOR  STRÅLING.
VORSICHT :
UNSICHTBARE  LASERSTRAHLUNG,  WENN 
ABDECKUNG  GEÖFFNET  UND  SICHEREITSVERRIEGELUNG 
ÜBERBRÜCKT.  NICHT  DEM  STRAHL  AUSSETZEN.
VARO
!
:
AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA  NÄKYMÄTTÖMÄLLE  LASERSÄTEILYLLE.  ÄLÄ  KATSO  SÄTEESEEN.
VARNING
:
OSYNLING LASERSTRÅLING NÄR DENNA  DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVERSEL :
USYNLIG  LASERSTRÅLING  NÅR  DEKSEL  ÅPNES  OG 
SIKKERHEDSLÅS BRYTES.  UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT
!
:
A  BURKOLAT  NYITÁSAKOR  LÁTHATATLAN  LÉZERSU-
GÁRVESZÉLY
!
   KERÜLJE  A  BESUGÁRZÁST
!
 
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
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  PUB-
LISHED  BY  SONY.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0
SUR  LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE
DES  PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ
DE  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.
Ver 1.1
4
HCD-DC1
SECTION  1
SERVICING  NOTES
The laser diode in the optical pick-up block may suffer electro-
static 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
repair 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
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
SERVICE POSTION
In checking the CD block, prepare jig (extension cable J-2501-
011-B).
Connect jig (extension cable J-2501-011-B)
to the MAIN board (CN101) and CD board (CN101). 
MAIN board
CD board 
Ver 1.1
• MODEL  IDENTIFICATION
– Rear Panel –
Power Voltage
Incdication
AC: 120 V 60 Hz 75 W
AC: 230 V -50/60 Hz 75 W
AC: 110 – 120/
220 – 240 V / 50/60 Hz 75 W
Model
US, CND, MX models
AEP, UK models
HK, MY, SP models
• Abbreviation
CND : Canadian model
HK
: Hong Kong model
MX
: Mexican model
MY
: Malaysia model
SP
: Singapore model
Power Voltage Indication
VOLTAGE SELECTOR
Switch
(HK, MY, SP models)

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