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2013B33-1

© 

2013.02

•  HCD-EC709iP is the amplifi er, CD player, tuner 

and iPod/iPhone section in MHC-EC709iP.

•  HCD-EC909iP is the amplifi er, CD player, tuner 

and iPod/iPhone section in MHC-EC909iP.

Model Name Using Similar Mechanism

NEW

Base Unit Name

BU-D1BD73

Optical Pick-up Block Name

DA11MMVGP

Photo: HCD-EC909iP

Compatible iPod/iPhone models:

iPhone 3GS

iPhone 3G

iPhone

iPod nano  

5th generation 

(video camera)

iPod touch  

2nd generation

iPod classic

120GB

160GB (2009)

iPod nano  

4th generation 

(video)

iPod classic

160GB (2007)

iPod touch  

1st generation

iPod nano  

3rd generation 

(video)

iPod classic

80GB

iPod nano  

2nd generation 

(aluminum)

iPod  

5th generation 

(video)

iPod nano  

1st generation

iPod 

4th generation 
(color display)

iPod 

4th generation

iPod mini

North American model: AC 120 V, 60 Hz
Australian model: AC 230 V − 240 V, 50/60 Hz

North American model: 250 W
Australian model: 250 W
(0.5 W at the Power Saving Mode)

North American model: 200 W
Australian model: 200 W
(0.5 W at the Power Saving Mode)

Approx. 200 mm × 306 mm × 389 mm

Approx. 5.7 kg

Approx. 5.5 kg

Standby power consumption: 0.5 W

wiring boards.

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

Front Speaker
With 12 ohm loads, both channels driven, from 120 – 10,000 Hz; 
rated 70 watts per channel minimum RMS power, with no more than 
0.7% total harmonic distortion from 250 milliwatts to rated output.

(North American model)

(Australian model)

North American model:

Front Speaker
RMS output power (reference):
180 W + 180 W (per channel at 12 Ω, 1 kHz)

Subwoofer
RMS output power (reference):
180 W (at 12 Ω, 80 Hz)

Australian model:

Front Speaker
Power output (rated):
85 W + 85 W (at 12 Ω, 1 kHz, 1% THD)
RMS output power (reference):
180 W + 180 W (per channel at 12 Ω, 1 kHz)

Subwoofer
RMS output power (reference):
180 W (at 12 Ω, 80 Hz)

North American model:

RMS output power (reference):
180 W + 180 W (per channel at 12 Ω, 1 kHz)

Australian model:

Power output (rated):
85 W + 85 W (at 12 Ω, 1 kHz, 1% THD)
RMS output power (reference):
180 W + 180 W (per channel at 12 Ω, 1 kHz)

PC IN (stereo mini jack): Sensitivity 800 mV, impedance 22 kilohms

SPEAKERS: Impedance 12 Ω
SUBWOOFER (MHC-EC909iP only): Impedance 12 Ω

System: Compact disc and digital audio system
Laser Diode Properties

Emission Duration: Continuous
Laser Output*: Less than 44.6μW

from the objective lens surface on the Optical Pick-up Block 

Frequency response: 20 Hz − 20 kHz 
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB

FM stereo, FM/AM superheterodyne tuner
Antenna:

FM lead antenna
AM loop antenna

FM tuner section:

Tuning range
North American model: 87.5 MHz − 108.0 MHz (100 kHz step)
Australian model: 87.5 MHz − 108.0 MHz (50 kHz step)
Intermediate frequency: 225 kHz

AM tuner section:

Tuning range
North American model:
530 kHz − 1,710 kHz (10 kHz step)
531 kHz − 1,710 kHz (9 kHz step)
Australian model:
531 kHz − 1,710 kHz (9 kHz step)
530 kHz − 1,710 kHz (10 kHz step)
Intermediate frequency: 53 kHz

* This output is the value measurement at a distance of 200mm 

The following measured at AC 240 V, 50/60 Hz

The following measured at AC 120 V, 60 Hz

(The United States model only)

with 7mm aperture.

Halogenated flame retardants are not used in the certain printed 

Design and specifications are subject to change without notice.

‡
‡

 iPod is a trademark of Apple Inc., registered in the U.S. 

and other countries.

 iPhone is a trademark of Apple Inc.
 MPEG Layer-3 audio coding technology and patents 

licensed from Fraunhofer IIS and Thomson.

 All other trademarks and registered trademarks are of 

their respective holders. In this manual, 

TM

 and 

®

 marks 

are not specified.

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.

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)

0  OR  DOTTED  LINE  

0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

0  SUR  

CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.

This appliance is classifi ed as 
a CLASS 1 LASER product.
This marking is located on the 
rear exterior.

  .............................................   4

2-1. Disassembly 

Flow 

...........................................................   6

2-2.  Side Panel (L)/(R) ...........................................................   6
2-3.  Ornament Plate (Dock) or iPod Assy ..............................   7
2-4.  IP Board Block, Base (Dock) Block ...............................   8
2-5.  Top Panel Block ..............................................................   8
2-6.  Back Panel Block ............................................................   9
2-7. MAIN 

Board 

...................................................................   9

2-8.  Front Panel Block ...........................................................   10
2-9. Knob 

(VOL) 

....................................................................  10

2-10.  Base Unit (BU-D1BD73) ................................................   11
2-11.  Optical Pick-up Block (DA11MMVGP) ........................   11

TEST  MODE 

 ............................................................   12

ELECTRICAL  CHECK 

 .........................................   13

5-1.  Block Diagram - CD SERVO, TUNER Section - ...........   14
5-2.  Block Diagram - MAIN Section - ...................................   15
5-3. Block 

Diagram 

 

- PANEL, POWER SUPPLY Section - ...........................   16

5-4.  Printed Wiring Board - BD73 Board - ............................   18

5-5.  Schematic Diagram - BD73 Board - ...............................   19
5-6. Printed 

Wiring 

Boards 

 

- iPod & iPhone, JACK Section - ...................................   20

5-7. Schematic 

Diagram 

 

- iPod & iPhone, JACK Section - ...................................   21

5-8. Printed 

Wiring 

Board 

 

- MAIN Board (Component Side) - ................................   22

5-9. Printed 

Wiring 

Board 

 

- MAIN Board (Conductor Side) - ..................................   23

5-10.  Schematic Diagram - MAIN Board (1/2) - .....................   24
5-11.  Schematic Diagram - MAIN Board (2/2) - .....................   25
5-12.  Printed Wiring Board - PANEL Board - .........................   26
5-13.  Schematic Diagram - PANEL Board - ............................   27
5-14.  Printed Wiring Board - POWER Board - ........................   28
5-15.  Schematic Diagram - POWER Board - ..........................   29

6-1. Overall 

Section 

...............................................................  34

6-2.  Top Panel Section ...........................................................   35
6-3.  Front Panel Section .........................................................   36
6-4.  iPod Dock Section ..........................................................   37
6-5.  MAIN Board Section ......................................................   38
6-6. Chassis 

Section 

...............................................................  39

  ..............................   40

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)

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 viscous (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.

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 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.

EC709iP: US and Canadian 
 models

120V - 60Hz 200W

EC709iP: Australian model

230–240V - 50/60Hz 200W

EC909iP: US and Canadian 
 models

120V - 60Hz 250W

EC909iP: Australian model

230–240V - 50/60Hz 250W

CAPACITOR  ELECTRICAL  DISCHARGE  PROCESSING
When checking the board, the electrical discharge is necessary for 
the electric shock prevention.
Connect the resistors referring to the fi gure below.

•  POWER board (C103, C104)
  Both ends of respective capacitors.

:/2 W

:/2 W

LASER  DIODE  AND  FOCUS  SEARCH  OPERATION  
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning on 
the S351. (push switch type)
The following checking method for the laser diode is operable.

• Method
  Emission of the laser diode is visually checked.
  1.  Open the upper lid.
  2.  Push the S351 as shown in Fig. 1.

Note: Do not push the detection lever strongly, or it may be bent or 

damaged.

  3.  Check the object lens for confi rming normal emission of the 

laser diode. If not emitting, there is a trouble in the automatic 
power control circuit or the optical pick-up.

    In this operation, the object lens will move up and down 2 

times along with inward motion for the focus search.