HCD-EC98P, MHC-EC98P, MHC-EC98PI - Sony Audio Service Manual (repair manual)

hcd-ec98p, mhc-ec98p, mhc-ec98pi service manual
Model
HCD-EC98P MHC-EC98P MHC-EC98PI
Pages
66
Size
4.9 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-ec98p-mhc-ec98p-mhc-ec98pi.pdf
Date

Read Sony HCD-EC98P / MHC-EC98P / MHC-EC98PI Service Manual online

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
HCD-EC98P
SPECIFICATIONS
COMPACT DISC RECEIVER
9-889-068-02
2009A05-1
© 
2009.01
US Model
Canadian Model
Australian Model
Ver. 1.1  2009.01
•  HCD-EC98P is the amplifi er, CD player and 
tuner section in MHC-EC98P/EC98Pi.
Model Name Using Similar Mechanism
CDM77B-K6BD90-WOD
HCD-EC78P
CDM88A-K6BD90-WOD
HCD-EC68
Mechanism Type
US, Canadian
CDM77B-K6BD90-WOD
Australian
CDM88A-K6BD90-WOD
Base Unit Name
BU-K6BD90-WOD
Optical Pick-up Block Name
KSM-213DCP
Main unit
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
Low channel
With 8 ohm loads, both channels driven, from 120 – 10,000 Hz; 60 watts
per channel minimum RMS power, with no more than 0.7% total
harmonic distortion from 250 milliwatts to rated output.
High channel
With 8 ohm loads, both channels driven, from 2,000 – 13,000 Hz;
60 watts per channel minimum RMS power, with no more than 0.7% 
total harmonic distortion from 250 milliwatts to rated output.
section
US and Canadian models:
Front Speaker
RMS output power (reference):
Low channel
95 W + 95 W (per channel at 8 Ω, 1 kHz, 10% THD)
High channel
95 W + 95 W (per channel at 8 Ω, 8 kHz, 10% THD)
Subwoofer
RMS output power (reference):
150 W (at 4 Ω, 80 Hz, 10% THD)
Inputs
AUDIO IN (stereo mini jack): Sensitivity 800 mV, impedance
22 kilohms
Outputs
PHONES (stereo mini jack): Accepts headphones with an impedance
of 8 Ω or more
SPEAKER: impedance: 8 Ω
SUBWOOFER OUT: impedance 4 Ω
CD player section
System: Compact disc and digital audio system
Laser: Semiconductor laser (
λ
=770 − 810 nm)
Emission duration: continuous
Frequency response: 20 Hz − 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna
FM tuner section:
Tuning range
North American model: 87.5 − 108.0 MHz (100 kHz step)
Australian model: 87.5 − 108.0 MHz (50 kHz step)
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
North American model:
530 − 1,710 kHz (with 10 kHz tuning interval)
531 − 1,710 kHz (with 9 kHz tuning interval)
Australian model:
531 − 1,710 kHz (with 9 kHz tuning interval)
530 − 1,710 kHz (with 10 kHz tuning interval)
Intermediate frequency: 450 kHz
General
Power requirements:
North American model: AC 120 V, 60 Hz
Australian model: AC 230 − 240 V, 50/60 Hz
Power consumption:
US model: 270 W
Canadian model: 350 VA
Australian model: 220 W
Dimensions (w/h/d) (excl. speakers):
Approx. 200 × 306 × 430 mm
Mass (excl. speakers):
US and Canadian models:
Approx. 6.9 kg
Australian model:
Approx. 7.0 kg
Australian model:
Front Speaker
Power output (rated):
Low channel
55 W + 55 W (at 8 Ω, 1 kHz, 1% THD)
High channel
55 W + 55 W (at 8 Ω, 8 kHz, 1% THD)
RMS output power (reference):
Low channel
75 W + 75 W (per channel at 8 Ω, 1 kHz, 10% THD)
High channel
75 W + 75 W (per channel at 8 Ω, 8 kHz, 10% THD)
Subwoofer
RMS output power (reference):
130 W (at 4 Ω, 80 Hz, 10% THD)
HCD-EC98P
2
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 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.
This appliance is 
classified as a CLASS 1
LASER product. This
marking is located on the 
rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.
SAFETY-RELATED COMPONET 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.
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  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COM-  POSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  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” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable.  (See 
Fig. A)
Fig. A.  Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
HCD-EC98P
3
1. 
SERVICING  NOTES
  .............................................   3
2. GENERAL
  ..................................................................   6
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................  10
3-2.  Side Panel (L)/(R) ...........................................................   11
3-3. Panel 
(Top) 
......................................................................  11
3-4. MAIN 
Board 
...................................................................  12
3-5.  Front Panel Block (Australian model) ............................   12
3-6.  Front Panel Block (US and Canadian models) ...............   13
3-7.  Back Panel Block ............................................................   13
3-8.  3 CD Mechanism Block (Australian model) ..................   14
3-9.  Base Unit (Australian model) .........................................   14
3-10.  1 CD Mechanism Block (US and Canadian models) .....   15
3-11.  Base Unit (US and Canadian models) ............................   15
3-12.  Belt (US and Canadian models) ......................................   16
3-13.  Belt (Australian model) ..................................................   16
3-14.  OP Base Assy (KSM-213D) ...........................................   17
4. 
TEST  MODE 
 ............................................................   18
5. ELECTRICAL 
 
ADJUSTMENTS 
 ........................   22
6. DIAGRAMS
6-1.  Block Diagram - CD SERVO, TUNER Section - ...........   25
6-2.  Block Diagram - MAIN Section - ...................................   26
6-3.  Printed Wiring Board - CD Board - ................................   28
6-4.  Schematic Diagram - CD Board - ...................................   29
6-5.  Printed Wiring Boards - MAIN Section - .......................   30
6-6.  Schematic Diagram - MAIN Section (1/3) - ...................   31
6-7.  Schematic Diagram - MAIN Section (2/3) - ...................   32
6-8.  Schematic Diagram - MAIN Section (3/3) - ...................   33
6-9.  Printed Wiring Board - HI AMP Board - ........................   34
6-10.  Schematic Diagram - HI AMP Board - ...........................   34
6-11.  Printed Wiring Board - LOW AMP Board - ...................   35
6-12.  Schematic Diagram - LOW AMP Board - ......................   35
6-13.  Printed Wiring Board - PANEL Board - .........................   36
6-14.  Schematic Diagram - PANEL Board - ............................   37
6-15.  Printed Wiring Boards - KEY Section - ..........................   38
6-16.  Schematic Diagram - KEY Section - ..............................   38
6-17.  Printed Wiring Board - PT Board - .................................   39
6-18.  Schematic Diagram - PT Board - ....................................   39
6-19. Printed Wiring Board 
 
- MOTOR Board (US and Canadian models) - ..............   40
6-20. Schematic Diagram 
 
- MOTOR Board (US and Canadian models) - ..............   40
7. 
EXPLODED  VIEWS
7-1. Panel 
Section 
...................................................................  47
7-2.  Front Panel Section .........................................................   48
7-3. Chassis 
Section 
...............................................................  49
7-4. Main 
Section 
...................................................................  50
7-5.  3 CD Mechanism Section (Australian model) 
 (CDM88A-K6BD90-WOD) 
...........................................  
51
7-6.  1 CD Mechanism Section (US and Canadian models) 
 (CDM77B-K6BD90-WOD) 
...........................................  
52
8. 
ELECTRICAL  PARTS  LIST
  ..............................   53
TABLE  OF  CONTENTS
SECTION  1
SERVICING  NOTES
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP  
BLOCK  OR  BASE  UNIT
The laser diode in the optical pick-up block may suffer electrostat-
ic 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 fl exible 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 refl ective surface by the objective lens in the optical 
pickup block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.
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 fl ow) 
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.
RELEASING  THE  DISC  TRAY  LOCK
The disc tray lock function for the antitheft of an demonstration 
disc in the store is equipped.
Releasing Procedure:
1. Press 
[
?/1
] button to turn the power on.
2.  Press the [FUNCTION] button to select CD function.
3.  While pressing the [
x
] button, press the [
Z
] button for more 5 
seconds).
4.  The message “UNLOCKED” is displayed and the disc tray is 
unlocked.
Note: When 
LOCKED
 is displayed, the slot lock is not released by 
turning power on/off with the
 [
?/1
]
 button.
HCD-EC98P
4
HOW  TO  REMOVE  THE  KNOB (VOL)
HOW  TO  OPEN  THE  TRAY  WHEN  POWER  SWITCH  TURN  OFF
 Turn a gear by a driver 
 
till a lever falls down 
 
to the position of the figure.
lever
gear
(Australian)
(US, Canadian)
 Pull the tray by the hand.
 Slide the boss by a driver.
boss
 knob (VOL)
hole
 Push the knob (VOL) by the flat head driver.
front panel block 
(back view) 
Page of 66
Display

Download Sony HCD-EC98P / MHC-EC98P / MHC-EC98PI Service Manual (Repair Manual)

Here you can read online and download Sony HCD-EC98P / MHC-EC98P / MHC-EC98PI Service Manual in PDF. HCD-EC98P / MHC-EC98P / MHC-EC98PI service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony HCD-EC98P / MHC-EC98P / MHC-EC98PI Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.