DOWNLOAD Sony HCD-EC50DC / MHC-EC50DC Service Manual ↓ Size: 5.61 MB | Pages: 64 in PDF or view online for FREE

Model
HCD-EC50DC MHC-EC50DC
Pages
64
Size
5.61 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-ec50dc-mhc-ec50dc.pdf
Date

Sony HCD-EC50DC / MHC-EC50DC Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
E Model
COMPACT DISC DECK RECEIVER
9-887-279-02
2008B00-1
© 2008.02
Ver. 1.1  2008.02
SPECIFICATIONS
HCD-EC50DC
HCD-EC50DC is the Amplifier, CD player, Tape
Deck and Tuner section in MHC-EC50DC.
Model Name Using Similar Mechanism
NEW
CD
Base Unit Name
BU-K6BD83S2-WOD ASSY
Section
Optical Pick-up Name
KSM-213DCP/C2NP
TAPE
Model Name Using Similar Mechanism
HCD-EC50
Section
Tape Transport Mechanism Type
Main unit
Amplifier section
DIN power output (rated): 40 + 40 W (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
50 + 50 W (6 ohms at 1 kHz, 10% THD) measured at AC 120, 220 or
240 V, 50/60 Hz
2 + 2 W (6 ohms at 1 kHz, 10% THD) measured at DC 12 V
Inputs
AUDIO IN (stereo mini jack): Sensitivity 800 mV, impedance 47
kilohms
Outputs
PHONES (stereo mini jack): Accepts headphones with an impedance of
8 ohms or more
SPEAKER: Accepts impedance of 6 ohms
CD player section
System: Compact disc and digital audio system
Laser Diode Properties
Emission duration: continuous
Laser Output*: Less than 44.6 
µ
W
* This output is the value measurement at a distance of 200mm from
the objective lens surface on the Optical Pick-up Block with 7mm
aperture.
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Tape deck section
Recording system: 4-track 2-channel, stereo
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna
FM tuner section:
Tuning range: 87.5 – 108.0 MHz (50 kHz step)
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range: 531 – 1,602 kHz (with 9 kHz tuning interval)
Intermediate frequency: 450 kHz
General
Power requirements: AC 120 V, 220 V, 230 V 240 V, 50/60 Hz Adjustable
with voltage selector DC 12 V
Power consumption: 95 W
Dimensions (w/h/d) (excl. speakers): Approx. 200 
×
 306 
×
 359.5 mm
Mass (excl. speakers): Approx. 5.7 kg
Design and specifications are subject to change without notice.
2
HCD-EC50DC
TABLE OF CONTENTS
1.
SERVICING NOTES
................................................
3
2.
GENERAL
...................................................................
4
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
7
3-2.
Side Panel (R), Side Panel (L) .........................................
8
3-3.
Top Panel Section ............................................................
8
3-4.
Mechanical Deck (Tape) ..................................................
9
3-5.
Belt (1), Belt (2) ..............................................................
9
3-6.
Front Panel Section ......................................................... 10
3-7.
PANEL Board .................................................................. 10
3-8.
JACK Board ..................................................................... 11
3-9.
DC Fan ............................................................................ 11
3-10. MAIN Board .................................................................... 12
3-11. CD Mechanism Deck Section (BU-K6BD83S2) ............ 13
3-12. Optical Pick-Up (KSM-213DCP), BD83S Board ........... 14
3-13. Belt (DLM3A) ................................................................. 15
3-14. DC JACK Board .............................................................. 15
3-15. Chassis (MAIN MOLD) .................................................. 16
3-16. PT Board, P-AMP Board, P-AMP-L Board,
TRANSISTOR Board ...................................................... 16
4.
TEST MODE
............................................................... 17
5.
MECHANICAL ADJUSTMENTS
......................... 18
6.
ELECTRICAL ADJUSTMENTS
.......................... 18
7.
DIAGRAMS
7-1.
Block Diagram — BD/DRIVER Section — .................. 24
7-2.
Block Diagram — TUNER Section — .......................... 25
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  PUBLISHED  BY  SONY.
7-3.
Block Diagram — MAIN Section — ............................. 26
7-4.
Printed Wiring Board — BD83S Board — .................... 27
7-5.
Schematic Diagram — BD83S Board — ....................... 28
7-6.
Printed Wiring Boards — MAIN Board,
TRANSISTOR Board, JACK Board — .......................... 29
7-7.
Schematic Diagram
— MAIN Board (1/3), TRANSISTOR Board — ........... 30
7-8.
Schematic Diagram
— MAIN Board (2/3), JACK Board — .......................... 31
7-9.
Schematic Diagram — MAIN Board (3/3) — ............... 32
7-10. Printed Wiring Board — P-AMP Board — .................... 33
7-11. Schematic Diagram — P-AMP Board — ...................... 34
7-12. Printed Wiring Boards — P-AMP-L Board,
GUARD (B) Board, DC JACK Board — ........................ 35
7-13. Schematic Diagram — P-AMP-L Board,
GUARD (B) Board, DC JACK Board — ........................ 36
7-14. Printed Wiring Board — PANEL Board — ................... 37
7-15. Schematic Diagram — PANEL Board — ...................... 38
7-16. Printed Wiring Board — PT Board — ........................... 39
7-17. Schematic Diagram — PT Board — .............................. 39
8.
EXPLODED VIEWS
8-1.
Overall Section ................................................................ 47
8-2.
Front Panel Section ......................................................... 48
8-3.
Chassis Section ................................................................ 49
8-4.
Top Section ...................................................................... 50
8-5.
CD Section And Base Unit (BU-K6BD83S2-WOD)
Section ............................................................................. 51
9.
ELECTRICAL PARTS LIST
.................................. 52
3
HCD-EC50DC
Notes on chip component replacement
Never reuse a disconnected chip component.
Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
Keep the temperature of the soldering iron around 270 
°
C
during 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
Unleaded solder melts at a temperature about 40 
°
C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 
°
C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
The laser diode in the optical pick-up block may suffer electrostatic
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 emission,
observe from more than 30 cm away from the objective lens.
SECTION 1
SERVICING NOTES
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.
When carrying this system
Remove all discs to protect the CD mechanism.
Hold down CD 
u
 (play/pause) on the unit, and press 
?/1
 until “STANDBY” appears.
After “LOCK” appears, unplug the power cord.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
CAUTION
4
HCD-EC50DC
SECTION 2
GENERAL
This section is extracted
from instruction manual.
Page of 64
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Sony HCD-EC50DC / MHC-EC50DC Service Manual ▷ Download

  • DOWNLOAD Sony HCD-EC50DC / MHC-EC50DC Service Manual ↓ Size: 5.61 MB | Pages: 64 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony HCD-EC50DC / MHC-EC50DC in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-EC50DC / MHC-EC50DC Audio. Information contained in Sony HCD-EC50DC / MHC-EC50DC Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.