Sony DIGITAL NOISE CANCELING HEADPHONES... Building instructions

SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio&Video Business Group
MDR-NC500D
SPECIFICATIONS
NOISE CANCELING HEADPHONES
9-889-146-03
2008J05-1
© 2008.10
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
Ver. 1.2 2008.10
General
Type Closed dynamic
Driver unit 40 mm, dome type (CCAW adopted)
Power handling capacity 100 mW
Impedance 40 Ωat 1 kHz
Sensitivity 102 dB/mW
Frequency response 5 - 24,000 Hz
Total Noise Suppression Ratio*1 Approx. 20 dB*2
Power source DC 3.7 V: Built-in lithium-ion
rechargeable battery,
2 × LR6 (size AA) batteries,
or AC power adaptor
Mass Approx. 195 g (6.9 oz)
Supplied accessories
Connecting cord (0.5 m, gold plated stereo mini plug) (1)
Connecting cord (1.5 m, gold plated L type stereo mini plug) (1)
Connecting cord with battery case (1)
Carrying case (1)
Plug adaptor for in-flight use*3 (single/dual) (1)
Gold-plated unimatch plug adaptor
(stereo phone plug ystereo mini jack) (1)
Sony LR6 (size AA) batteries (2) (US and Tourist models)
AC power adaptor (1)
Operating Instructions (1)
Product Information (1)
Startup guide (1)
Card warranty (1)
*1 Under the Sony measurement standard.
For details about the Total Noise Suppression
Ratio amount for each mode, refer to the
Product Information booklet.
*2 Equivalent to approx. 99 % reduction of energy of sound compared
with not wearing headphones
(NC MODE A).
*3 May not be compatible with some in-flight music services.
Design and specifications are subject to change without notice.
General charging and usage time
Charging time Usage time*1
Approx. 3 hours *2 Approx. 15 hours*3
*1 At 1 kHz, 0.1 mW + 0.1 mW output
*2 Hours required to fully charge an empty battery
*3 Time stated above may vary, depending on ambient temperature or
conditions of use.
Battery life
Battery type Approx. hours*1
Sony Alkaline 10 hours *2
LR6 (size AA) battery
*1 Output at 1 kHz, 0.1 mW + 0.1 mW
*2 Time stated above may vary, depending on ambient temperature or
conditions of use.
Note (US and Tourist models)
Because the supplied battery was included in the package from the time of
manufacture (as a convenience to the user), it is possible that the battery
life may be somewhat depleted by the time of purchase. The actual life
of the supplied battery may be shorter than the standard time described in
this manual when using a fresh battery.

MDR-NC500D
2
1. SERVICING NOTES ............................................. 3
2. GENERAL .................................................................. 4
3. DISASSEMBLY
3-1. Disassembly Flow........................................................... 5
3-2. MAIN Board (Rch)......................................................... 6
3-3. Battery (Li-ion) Sub Assy (Lch) ..................................... 6
3-4. CHARGER Board (Lch)................................................. 7
3-5. Wire Setting .................................................................... 8
4. ELECTRICAL ADJUSTMENT ........................... 9
5. DIAGRAMS
5-1. Block Diagram - AUDIO Section -................................. 13
5-2. Block Diagram - POWER SUPPLY Section -................ 14
5-3. Printed Wiring Board - MAIN Board -........................... 16
5-4. Schematic Diagram - MAIN Board (1/3) -..................... 17
5-5. Schematic Diagram - MAIN Board (2/3) -..................... 18
5-6. Schematic Diagram - MAIN Board (3/3) -..................... 19
5-7. Printed Wiring Board - CHARGER Board
(US, CND, JE models) - ................................................. 20
5-8. Printed Wiring Board - CHARGER Board
(Except US, CND, JE models) - ..................................... 20
5-9. Schematic Diagram - CHARGER Board - ..................... 21
6. EXPLODED VIEWS
6-1. Housing, Lithium-Ion Battery Section............................ 28
6-2. MAIN Board, CHARGER Board Section ...................... 29
7. ELECTRICAL PARTS LIST .............................. 30
Accessories are given in the last of the electrical parts list.
• Abbreviation
CND : Canadian model
JE : Tourist model
TABLE OF CONTENTS
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.
Note
• Use the AC power adaptor supplied with this unit. Do
not use any other AC power adaptor since it may
cause the unit to malfunction.
Polarity of the plug
SAFETY-RELATED COMPONET WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Ver. 1.2

MDR-NC500D
3
SECTION 1
SERVICING NOTES
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 viscous (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.
NOTE OF REPLACING THE IC501, IC551, IC601,
IC801 AND IC802 ON THE MAIN BOARD
IC501, IC551, IC601, IC801 and IC802 on the MAIN board can-
not exchange with single. When these parts on the MAIN board are
damaged, exchange the entire mounted board.
NOTE OF REPLACING THE IC402 ON THE CHARGER
BOARD
IC402 on the CHARGER board cannot exchange with single.
When this part on the CHARGER board is damaged, exchange the
entire mounted board.

MDR-NC500D
4
SECTION 2
GENERAL This section is extracted
from instruction manual.
When the rechargeable
battery is low
When the rechargeable battery is low, short beeps
sound from the unit for 8 seconds and the
POWER indicator blinks slowly.
When the battery level is getting lower, a long
beep sounds from the unit for 2 seconds and the
POWER indicator blinks quickly, and all
operations are stopped. Move the POWER switch
to “OFF” in this case.
[Tips
When the battery runs out, you can supply the power to
the headphones in one of the following ways:
• Connect the headphones to the AC power adaptor by
following the steps shown in “Charge the
headphones.”
You can use the headphones while charging.
• Use the supplied connecting cord with battery case.
See “How to use the connecting cord with battery
case” for details.
Using your AC power
adaptor abroad
You can use your AC power adaptor in any
country or area that uses 100 V to 240 V AC,
50/60 Hz, by connecting a plug adaptor. If the
country you visit employs a different shaped
socket, use the correct plug adaptor.
Consult your nearest travel bureau for the type of
plug adaptor needed for your trip.
Listening to music
1Connect the headphones to the AV
equipment.
* “WALKMAN” and “WALKMAN” logo are
registered trademarks of Sony Corporation.
Notes
• When connecting the cord, insert the plug into the
jack until the green portion of the plug disappears.
• To disconnect the cord, pull it out by the plug, not
the cord, as the inner conductors may break.
2Turn on the power on the right side of the
headphones.
The POWER indicator lights up in blue, and a
short beep sounds from the unit.
3Put on the headphones.
After confirming the cord on the left and the
POWER switch on the right, put on the
headphones.
Adjust the ear pads so as to cover your ears.
4Start playing on the AV equipment
connected to the headphones.
Note
Playback is not available when there is no
power.
5Set the POWER switch of the
headphones to “OFF,” and then set the
POWER switch of the battery case to
“ON.”
The POWER indicator on the battery case
lights up green.
See steps 2 to 4 of “Listening to music” for
the following setting steps.
After use, set the POWER switch of both the
headphones and the battery case to “OFF.”
[Tips
• The power supply of the rechargeable battery is
consumed first, unless the battery runs out.
• If you connect and turn on the connecting cord with
the battery case in advance when the rechargeable
battery is low, you can use the headphones
uninterrupted, even after the battery in the
headphones runs out.
Notes
• The use of manganese batteries is not recommended,
since this type of battery has an extremely short
usage time.
• The battery case supplies the power to the
headphones for operation purposes only. It does not
charge the internal rechargeable battery in the
headphones.
• The POWER indicator of the battery case becomes
dim when the battery life is reaching the limit.
Replace the battery with new ones at the time.
• The supplied connecting cord with battery case is
only for these headphones. Do not connect to other
equipment.
After use
Turn off the power of the headphones.
Flat Storage
T
he housings rotate to make them flat for easy
storage in the carrying case (supplied), or in a seat
pocket. Restore to their usual position before using.
3-3-
Putting the headphones
in the carrying case
Rotate the housings to be flat before putting them
in the carrying case.
Features
(US and Tourist models )
•Digital noise canceling headphones
with Sony’s unique DNC Software
Engine.
Creation of a high-precision canceling signal
delivers outstanding noise canceling
performance.
•AI (Artificial Intelligence) Noise
Canceling function.
Automatic selection of the optimal noise
canceling mode based on intelligent analysis of
environmental ambient noise.
•
Digital equalizer delivers ideal frequency
response and high-quality music
reproduction.
•High S/N ratio achieved through digital
signal processing.
•Lightweight design creates extremely
comfortable wearing fit.
Generous use of lightweight materials such as
Magnesium and A7075 aluminum alloy.
•Pressure relieving urethane cushion in
the earpad.
The earpad structure provides comfort without
stress even after extended use.
•Built-in monitor function lets you
silence the audio to listen outside.
Charge the headphones
The headphones contains a rechargeable Lithium-
Ion battery. Charge the battery before use.
Connect the supplied AC power adaptor to the DC
IN 6V jack on the headphones and an AC outlet.
The charge indicator lights up in orange and
charging starts.
Charging is completed after about three hours,
and the charge indicator goes out.
Disconnect the AC power adaptor after the
charging has finished.
Utilizing the AI Noise
Canceling
1Press the AI NC MODE button.
When you press the AI NC MODE button and
the POWER switch is set to “ON”, sounds
come from the headphones to inform you that
the unit has started analyzing ambient sound
components (approx. 3 seconds).
During analysis, sound reproduction from the
unit is stopped and the POWER indicator
lights in pink.
When analysis is completed, the most
effective noise canceling mode is set
automatically, and sound reproduction from
the headphones starts.
AI Noise Canceling
AI Noise Canceling is a useful function that
automatically selects one of the noise canceling
modes. This function provides the most effective
noise canceling mode by immediately analyzing
ambient sound components when the AI NC
MODE button is pressed.
[Tips
• When the power of the headphones is turned on,
mode A is set. (See “Noise canceling mode types,”
for details about Mode A.)
• Press the AI NC MODE button again to reset the
noise canceling mode if ambient noise has changed,
such as when you move outdoors from a room.
To set the noise canceling mode
manually
You can set the noise canceling mode manually
(manual noise canceling).
1Press and hold the AI NC MODE button
for more than one second.
Sounds ( ) come from the headphones to
inform you that manual noise canceling is set.
2Press the AI NC MODE button
repeatedly to change the mode type.
The POWER indicator blinks pink and a
beep(s) sound(s) from the headphones. After
that, the noise canceling mode is set. The
number of POWER indicator blinks and the
beep sounds depends on the mode selected.
See “Noise canceling mode types.”
[Tips
• Mode A is selected when manual noise canceling is
activated.
• To change from manual noise canceling to AI Noise
Canceling, press and hold the AI NC MODE button
for more than one second. When you hear the sounds
() to inform you of the change to AI Noise
Canceling, press the AI NC MODE button again.
Ambient analysis starts and the most effective noise
canceling mode is set automatically.
Noise canceling mode types
Mode names Number of POWER indicator
blinks (pink) and beep
sounds
A1
B2
C3
A:Noise mainly in an airplane is effectively reduced.
B: Noise mainly in a bus or a train is effectively
reduced.
C: Noise mainly found in an office environment (PC,
copier, air ventilation, etc.) is effectively reduced.
Hearing environmental
sound for safety
If the MONITOR button is pressed and held while
the POWER switch is set to ON, playback silences
then you can hear the surrounding environment.
Note
Environmental sound might not be heard if the
microphone is covered with your fingers.
When using in an
airplane
• The supplied plug adaptor can be connected to
the dual or stereo mini jacks in an airplane.
• Do not use the headphones when use of
electronic equipment is prohibited, or when use
of personal headphones for in-flight music
services are prohibited.
How to use the
connecting cord with
the battery case
You can continue to use the unit, even when the
rechargeable battery in the headphones runs out,
by connecting the supplied connecting cord with
battery case.
Use the connecting cord with battery case by
inserting two size AA alkaline batteries.
1Open the lid of the battery case.
2Insert two size AA alkaline batteries.
Make sure of direction, matching the F
marks in the case with those on the batteries.
3Close the lid.
4Connect the supplied connecting cord
with the battery case to both the
headphones and AV equipment.
Notes
• When connecting the cord, insert the plug fully into the
jack so that the green sign on the metal parts cannot be
seen.
• When disconnecting the cord, pull it out by holding the
plug. If the cord is pulled forcibly the wire may break.
3-
POWER
indicator
AI NC MODE
button
AV equipment
Headphones
Connecting cord with
battery case (supplied)
for dual jacks for stereo mini jacks
3-
POWER
indicator
POWER
switch
POWER switch
POWER indicator
3-
Monitor microphone
MONITOR
button
Headphones
To an AC outlet
AC power
adaptor
(supplied)
To DC IN
6V jack
Charge
indicator
Connecting cord
0.5 m (supplied)
When connecting
to the stereo mini
jack of the remote
control supplied
with a WALKMAN,
etc.
Remote
control
When connecting
to the stereo mini
jack of a
WALKMAN*, etc.
Headphones
Connecting
cord 1.5 m
(supplied)
Tactile dot
(on the left)
Features
(Except US and Tourist models )
•
Digital noise canceling headphones with
Sony’s unique DNC Software Engine.
Reduces approx. 99% of ambient noise by
creating a high-precision canceling signal.
•AI (Artificial Intelligence) Noise
Canceling function.
Automatic selection of the optimal noise
canceling mode based on intelligent analysis of
environmental ambient noise.
•Digital equalizer delivers ideal
frequency response and high-quality
music reproduction.
•High S/N ratio achieved through digital
signal processing.
•Lightweight design for extremely
comfortable wearing.
Generous use of lightweight materials such as
Magnesium and A7075 aluminum alloy.
•Pressure relieving urethane cushion in
the earpad.
The earpad structure provides comfort without
stress even after extended use.
•Built-in monitor function lets you
silence the audio to hear externally.

MDR-NC500D
5
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
– Rch – – Lch –
3-2. MAIN BOARD (Rch)
(Page 6)
3-3. BATTERY (LI-ION)
SUB ASSY (Lch)
(Page 7)
3-4. CHARGER BOARD (Lch)
(Page 8)
3-5. WIRE SETTING
(Page 8)
SET

MDR-NC500D
6
ear pad (R)
shield sheet (C)
shield sheet (D)
flexible flat cable
(MAIN board: CN405/POWER board)
sheet (A)
Remove solders.
Remove solders.
RB claw
RB claw
RT MAIN board
to CHARGER board
natural
natural (MC201)
natural (MC201)
natural (SP201)
red (SP201)
blue (MC201)
blue (MC231)
natural
natural
to MODE board to RESET board
natural greenred
red
red/dark blue
red/green
natural/green
green
white
black
dark blue
blue
yellow
screen
two screws
(M2.6)
housing (R) sub assy
cushion saranet
• POSITION OF LEAD WIRES (MAIN board: Side B)
Note: Follow the disassembly procedure in the numerical order given.
3-2. MAIN BOARD (Rch)

MDR-NC500D
7
3-3. BATTERY (LI-ION) SUB ASSY (Lch)
3-4. CHARGER BOARD (Lch)
ear pad (L)
connector
battery (LI-ION) sub assy
sheet (B)
shield sheet (B)
black
CN403
red
screen
two screws
(M2.6)
housing (L) sub assy
CHARGER board
battery (LI-ION) sub assy lead
– Side A – – Side B –
CHARGER board
to MAIN board
to MAIN board
flexible flat cable
(CHARGER board: CN402/JACK board)
dark blue red/dark blue
blue
natural
yellow
white
red
black
black (housing plate)
black (JACK board)
red (JACK board)
green
natural/green
red/green
natural
claw
claw
claw
claw
Remove solders.
blue (MIC131)
natural (MIC131)
blue (MIC101)
natural (MIC101)
natural (SP101)
red (SP101)
• POSITION OF LEAD WIRES (CHARGER board)

MDR-NC500D
8
3-5. WIRE SETTING
relay cord
– Lch – – Rch –
MIC NC wireMIC NC wire
driver wiredriver wire
ground wire
relay cord
JACK wire
MIC monitor wire
sheet (B)
sheet (A)
JACK board flexible flat cable
relay cord wire
relay cord wire
MODE board wire RESET board wire
cushion saranet

MDR-NC500D
9
SECTION 4
ELECTRICAL ADJUSTMENTS
NOISE CANCELING VOLUME ADJUSTMENT
Procedure:
1. Prepare the following parts.
22 kΩresistor (Part No.: 1-260-115-11)
330 Ωresistor (Part No.: 1-260-093-11)
270 Ωresistor (Part No.: 1-260-092-11)
39 Ωresistor (Part No.: 1-260-082-11)
100 µF capacitor (Part No.: 1-126-933-11)
2. Remove the shield sheet (C) and sheet (A). (Refer to Fig. 1-1)
3. Remove lead wires of the TP182 (dark blue), TP183 (red/dark blue). (for CHARGER board (SP101)) (Refer to Fig. 1-2)
4. Remove lead wires of the TP282 (natural), TP283 (red). (for SP201) (Refer to Fig. 1-2)
remove the sheet (A) remove the shield sheet (C)
SL101
R111
TP103
RV282
RV101
Remove
Remove
Red
Red/Dark Blue
Dark Blue
Natural RV201
RV182
SP201
TP183
TP182
TP282
TP283
TP478
TP184
TP203
TP284
R211 SL201
CHARGER board
(SP101)
– MAIN Board (Side B) –
Fig. 1-1 Fig. 1-2

MDR-NC500D
10
1AMP Gain Adjustment
Connection:
1. Connect resistors (22 kΩ, 330 Ω+ 270 Ω) and capacitor (100 µF) to the TP184, TP478. (Refer to Fig. 2)
2. Connect a resistor to (39 Ω) the TP182, TP183. (Refer to Fig. 2)
3. Connect a resistor to (39 Ω) the TP282, TP283. (Refer to Fig. 2)
(input L-CH)
(measure
L-CH)
(measure
R-CH)
(input R-CH)
level
level
22 kΩ
270 Ω
330 Ω
600 Ω
100 µF
+
A
B
audio analyzer
OUT
IN
output impedance: 600 Ω
signal: 1 kHz, 0 dBv
measure $(L-CH)
and %(R-CH) level
39 Ω
39 Ω
C
D
adjustment parts
SL101
R111
TP103
RV282
RV101
RV201
RV182
TP183
TP182
TP282
TP283
TP478
TP184
TP203
TP284
R211 SL201
– MAIN Board (Side B) –
Do not touch in
this adjustment.
Fig. 2
Adjustment:
– L-CH –
1. Connect an audio analyzer (output impedance: 600 Ω) to Aand Bin Fig. 2.
2. Input the signal (1 kHz, 0 dBv) from the audio analyzer.
3. Adjust RV182 so that Clevel in Fig. 2 (between TP182 and TP478) is –2.6 dBv ±0.1 dB. (Refer to Fig. 3)
– R-CH –
4. Remove the one side of resistor (22 kΩ) of the TP184, and connect to TP284. (Refer to Fig. 3)
5. Input the signal (1 kHz, 0 dBv) from the audio analyzer.
6. Adjust RV282 so that the Dlevel in Fig. 2 (between TP238 and TP478) is –2.6 dBv ±0.1 dB. (Refer to Fig. 3)
RV182, RV282
nearby mechanical center
0°
15°
–15°
Fig. 3. Adjusted position (reference)

MDR-NC500D
11
2Canceling Gain Adjustment
Procedure:
1. Remove the resistors (39 Ω) from TP182, TP183.
2. Remove the resistors (39 Ω) from TP282, TP283.
3. Connect the lead wires of CHARGER board (SP101) to the TP182 (dark blue), TP183 (red/dark blue). (Refer to Fig. 4)
4. Connect the lead wires of SP201 to the TP282 (natural), TP283 (red). (Refer to Fig. 4)
5. Remove the one side of resistor (22 kΩ) of TP284, and connect to TP184. (Refer to Fig. 4)
6. The screw is closes into the hole (two places) where housing (R-CH side) is fixed. It closes it so that air should not leak. (Refer to Fig.
5)
Note: The problem is not in this hole even if it closes it with not the screw but clay, tape and so on. The hole is completely closed with stability so as not to
do the air leak.
7. Remove the R111 (0 Ω) and R211 (0 Ω).
8. Connect a capacitor (100 µF) to the TP103.
(input L-CH)
(input R-CH)
22 kΩ
270 Ω
330 Ω
600 Ω
100 µF
100 µF
+
A
B
audio analyzer
OUT
IN
output impedance: 600 Ω
signal: 220 Hz, –26 dBv
Do not touch in
this adjustment.
adjustment parts
SL101
R111
TP103
RV282
RV101
RV201
RV182
TP183
TP182
TP282
TP283
TP478
TP184
TP203
TP284
R211 SL201
– MAIN Board (Side B) –
Red
Red/
Dark Blue
Dark Blue
Natural
SP201
CHARGER board
(SP101)
+
(measure R-CH)
(measure L-CH)
Fig. 4
hole for R-CH side housing fixation
(completely closes it with screw,
clay, tape and so on)
Fig. 5

MDR-NC500D
12
Adjustment:
– L-CH –
1. Put the housing (L-CH side) on flat table.
2. Put a weight (500 g) on the housing. (Refer to Fig. 6)
3. Press the housing so that the flat table of ear pad is sealed. (It notes do not press very strong)
4. Input the signal (220 Hz, –25 dBv) from the audio analyzer.
5. Adjust RV101 so that the level of connected capacitor to TP103 is –14 dBv ± 0.3 dB. (Refer to Fig. 8)
– R-CH –
6. Remove the one side of resistor (22 kΩ) of the TP184, and connect to TP284.
7. Remove the one side of capacitor (100 µF) of the TP103, and connect to TP203
8. Put the housing (R-CH side) on flat table.
9. Put a weight (500 g) on the housing. (Refer to Fig. 6)
(MAIN board is covered so that there is no short-circuit. RV201 makes it not blocked with the cover) (Refer to Fig. 7)
10. Press the housing so that the flat table of ear pad is sealed. (It notes do not press very strong)
11. Input the signal (220 Hz, –25 dBv) from the audio analyzer.
12. Adjust RV201 so that the level of connected capacitor to TP203 is –14 dBv ± 0.3 dB. (Refer to Fig. 8)
weight (500g)
flat table
housing
ear pad
hole (RV201)
cover
Fig. 6 Fig. 7
RV101
0°0°
90°
90°
nearby 30°
nearby 30°
RV201
Fig. 8. Adjusted position (reference)
End of adjustment processing:
1. Remove the resistors (22 kΩ, 330 Ω+ 270 Ω) and capacitor
(100 µF) from TP284, TP478.
2. Remove the capacitor (100 µF) from TP203.
3. SL101 and SL201 are short-circuited with solders.
4. The screw (or clay, tape and so on) fixed to the hole is re-
moved.
5. Wire setting, shield sheet (C) and sheet (A) are pasted.
(Flexible flat cable is cover. MIC is not cover) (Refer to Fig.
9)
MIC is not cover flexible flat cable is cover
lead wires are stored on the MAIN board side
Fig. 9

MDR-NC500D
MDR-NC500D
1313
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - AUDIO Section -
17 LLINEIN
(INPUT)
JACK BOARD (1/3)
LINE AMP
IC361 (1/2)
LINE AMP
IC361 (2/2)
MIC AMP
IC301 (1/2)
AUDIO SWITCH
IC183
AUDIO SWITCH
IC181
AUDIO SWITCH
IC182
16
3
RLINEIN
SDIN
DOUT A10 A11DR2 DX2
E7DX0
28BCLK A9 CLKR2
4LRCOUT C9 FSR2
22
22
SCLK
21
XTI/MCLK
D8 DR1
D7 CLKR1
A7 FSR1
F2 X2/CLKIN
STEREO AUDIO CODEC
IC551
1DIN
A
SD
9LOUT
10ROUT
STEREO AUDIO CODEC
IC501 (2/2)
DSP
IC601
17 LLINEIN
16
3
RLINEIN
23 XTO
SDIN
DOUT
22 XTI/MCLK
B10 CLKX2
28BCLK
4LRCOUT
27
22
SCLK
21
CLKOUT
STEREO AUDIO CODEC
IC501 (1/2)
D10 FSX 2
15 SDA
36 DX0
DR0
CLK0
FSR0
FSX0
INT0
INT1
GPIO4
GPIO5
DSPRST
14 SCLK
19MONPATH
20HYBPATH2
SYSTEM CONTROLLER
IC801 (1/2)
21HYBPATH1
X501
12.288MHz
POWER AMP
IC184
RV101
SP101
(L-CH)
MIC131
(MONITOR)
MIC101
(NOISE DETECT)
MIC BIAS
Q130 A+3.3V
MIC AMP
IC301 (2/2)
AUDIO SWITCH
IC283
AUDIO SWITCH
IC281
3AMUTE
AUDIO SWITCH
IC282
D6DR0 35
B5CLKR0 37
C6CLKX0
A5FSR0 50
B6FSX0 49
G14_INT0 2
G13_INT1 1
A3GPIO4 29
D5GPIO5 27
H12_RESET 32
MIC231
(MONITOR)
MIC201
(NOISE DETECT)
MIC BIAS
Q230 A+3.3V
+
POWER AMP
IC284
SP201
(R-CH)
+
AMP OFF
SWITCH
Q476
: MONITOR
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
SIGNAL PATH
RV182
AMP GAIN
RV282
AMP GAIN
CANCELING GAIN
RV201
CANCELING GAIN

MDR-NC500D
MDR-NC500D
1414
BATT101
LITHIUM ION
BATTERY
3.7V 1,260mAh
5BAT2618 KEYPOWERLED_B OUT
6BAT
4IN
2STAT1
7ISET2
VOLTAGE
DETECT
IC405
VOLTAGE
DETECT
IC404
VOLTAGE
DETECT
IC471
DC/DC
CONVERTER
IC401, Q401
SWITCHING
Q405
SWITCHING
Q474 (2/2)
TH401
12
TS
9
CE
Q402
−+
DC IN 6V
JACK BOARD (3/3)
(CHARGE)
JACK BOARD (2/3)
8
15
OUT
16
OUT
17
MODE
ON 5OFF
POWER
24KEYMON
25KEYMODE
40VBATT
4DDCE
5_RESET
6BATTSEL
POWER BOARD (2/2)
POWER BOARD (1/2)
RESET BOARD
D802
B+ SWITCH
Q472, 473
LED DRIVE
Q802
DC/DC CONVERTER
IC473
DC/DC CONVERTER
IC472
POWER/CHARGE CONTROL
IC402
3Vin
SW2
6
SW1
RUN1
4
2
RUN2
7
D+2.8V
D+1.35V
SWITCHING
Q474 (1/2)
3Vin
SW2
6
SW1
RUN1
4
2
RUN2
7
A+3.3V
D+2.1V
Q475
RESET SIGNAL
GENERATOR
IC802
RESET
MODE BOARD
AI NC MODE
MONITOR
(POWER)
30 LED_R
(AI NC MODE)
LED DRIVE
Q801
SYSTEM CONTROLLER
IC801 (2/2)
A
SD
VOLTAGE
DETECT
IC403
SWITCH
Q404
SWITCH
Q403
5-2. BLOCK DIAGRAM - POWER SUPPLY Section -

MDR-NC500D
MDR-NC500D
1515
For Schematic Diagrams.
Note:
• All capacitors are in µF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ωand 1/4 W or less unless otherwise
specified.
• A: B+ Line.
• H: adjustment for repair.
• Power voltage is dc 3.7 V and fed with regulated dc power
supply from CN403 pin 1and pin 2on the CHARGER
board.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : POWER ON
• Voltages are taken with VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F: AUDIO (ANALOG)
J: AUDIO (DIGITAL)
N: MONITOR
• The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
from that of conventional IC.
• Abbreviation
CND : Canadian model
JE : Tourist model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• Y: parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Lead layouts
surface
CSP (Chip Size Package)Lead layout of conventional IC
• MAIN board is multi-layer printed board. However, the
patterns of intermediate-layers have not been included in
diagrams.
• Circuit Boards Location
MAIN board
RESET board
MODE board
POWER board
JACK board
CHARGER board
– Rch –
– Lch –
IC472 (SW1)
200 mV/DIV, 200 ns/DIV
472 ns
0.5 Vp-p
IC472 (SW2)
200 mV/DIV, 200 ns/DIV
468 ns
0.6 Vp-p
IC473 (SW2)
500 mV/DIV, 200 ns/DIV
472 ns
0.7 Vp-p
IC473 (SW1)
200 mV/DIV, 200 ns/DIV
468 ns
0.7 Vp-p
81.5 ns
0.2 Vp-p
IC501 XE (XTO)
100 mV/DIV, 50 ns/DIV
• Waveforms
– MAIN Board –

MDR-NC500D
MDR-NC500D
1616
TP551
SL801
SL803
TP804
TP805
TP806
TP807
TP808
TP809
TP803
TP802 TP801
TP501
TP502
TP503
TP504
TP505
TP613
TP832
TP506
SL802
TP473
TP834
TP835
C509
R801
IC802
R823
C823
D802
R835
R822
R830
C606
FB503
FB621
C625
C503
C508
C511
CN801
R212
R112
R600
R803
R506
C821
C801
C803
C506
C632
R804
C504
R626
R806
R805
R807
R824
C502
R812
C808
C505
R509
Q801
C501
R808
R811
C651
R810
C809
R814
R815
R820
R821
D801
R502
FB502
R503
R556
C822
R634
R635
C636
C644
C646
R813
C642
C643
R504
L501
R838
R833
R819
R817
R507
R636
R630
R557
L551
C807
C810
FB812
R840
L801
L601
R827
X501
R836
C813
R828
L502
C512
C513
R633
C650
IC601
R826
L602
R837
Q802
R818
C820
C645
C648
C635
C629
C627
C641
R624
R631
R628
C640
C630
C628
C624
R627
R632
R629
C614
C639
C617
C622
C637
C633
C621
C610
R621
C616
C649
R614
R619
R618
C603
R615
R616
R617
R607
R620
C647
C601
C602
C615
R602
C607
R603
R604
FB601
C612
C605
C510
C812
R609
R608 R611
C608
R610
C551
R612
C604
C613
C611
C620
C806
R551
R832
FB504
C553
L552
C555
C552
C559
C554
C556
R555
R606
R173
R273
C557
C560
C558
R809
R834
FB813
FB811
R553
FB810
C802
R613
FB501
IC801
C631
C638
C623
C634
C626
FB551
TP838
C652
C656
C657
C658
C659
R601
C661
C663
C664
C665
C669
C670
R642
C671
C672
C673
C674
R637
R638
R639
R640
R829
C814
C815
C816
C817
C818
C819
TP833
R643
R641
IC501
IC551
R605
R644
TP839
FB552
R560
TP552
TP553
FB553
R554
R501
R510
TP471
R167
C163
R163
C162
C263
R267
R263
C262
TP162
TP815 TP827
R174
R274
TP104
TP103
SL101
TP203
R283
C286
R293
TP284
SL201
TP204
R193
TP181
C186
R183
C190
TP189
TP190
R198
R298
C290
TP281
C292
C192
TP101
TP102
TP131
TP132
TP183
TP182
TP261
TP361
TP161
R106
C104
R136
C135
C204
R206
R236
C235
TP333
R140
R240
TP233
TP133
TP837
TP472
R190
R290
TP262
TP474
TP475
TP476 TP477
R261
R161
IC472
FB261
R264
C264
C231
R162
C201
C476
C471
R262
C361
R471
C474
C485
Q472
Q473
R472
FB182
R477
C488
IC473
C477
L471
C482
C481
C483
C480
FB282
L472
FB161
FB361
FB183
FB283
C164
L473
C490
R164
R171
C475
R268
D265
D264
D262
D263
R266
R269
R271
R168
R169
R166
D163
D162
D165
D164
C363
C362
IC361
IC471
R276
R194
R176
C283
R186
R282
IC281
IC284
IC282
IC283
R289
R285
R296
R196
R281
R284
C282
C287
C284
IC181
C191
R287
C291
C285
R381
C281
IC184
IC182
IC183
R286
C189
C289
R182
R185
R188
R211
R213
R113
R111
R189
C187
R297
C181
C185
R187
C184
R197
C182
C183
R184
R288
C102
IC301
C230
C302
C232
D202
D203
R231
D204
R202
D201
C301
R205
R130
R207
R203
R201
C234
R230
R232
D231D232
R235
R238
R233
D233 D234
R237
R138
D133
D134
D131 D132
R131
R137
R135
C132
R133
R132
R105
D102
D101
R108
R103
D103
D104
R101
C134
R102
Q130
Q230
R208
C130
R107
R104
C202
C478
R480
R479
R478
R482
R481
C479
R487
R488
C487
C194
R192
C294
R292
CN405
TP817
TP816
TP811
TP814
TP830
R178
R179
R180
R278
R279
R280
TP813
TP826
TP812
TP810
RV182
RV201
RV101
RV282
TP238
R294
R495
R496
C499
R491
R492
C498
R181
TP478
TP479
R843
R499
R470
R493
R469
R494
FB471
FB131
FB101
FB132
FB102
TP232
TP202
FB201
FB202
FB231
FB232
TP231
TP201
TP184
TP290
TP289
C133
C103
C203
C233
TP282
TP283
C472
C470
FB472
C496
C495
C494
Q474
R490
Q475
R842
C492
C484
R486
C486
R485 R484
L474
C489
C497
C161
C261
R277
R177
R172 R272
R259
C288
C188
R159
R457
Q476
1
7
21
22 28
14
10
8
15
1
7
21
A14
B14
C14
D14
E14
F14
G14
H14
J14
K14
L14
M14
N14
P14
A13
B13
C13
D13
E13
F13
G13
H13
J13
K13
L13
M13
N13
P13
A12
B12
C12
D12
E12
F12
G12
H12
J12
K12
L12
M12
N12
P12
A11
B11
C11
D11
E11
F11
G11
H11
J11
K11
L11
M11
N11
P11
A10
B10
C10
D10
E10
F10
G10
H10
J10
K10
L10
M10
N10
P10
A9
B9
C9
D9
E9
K9
L9
M9
N9
P9
A7
B7
C7
D7
E7
K7
L7
M7
N7
P7
A6
B6
C6
D6
E6
K6
L6
M6
N6
P6
A5
B5
C5
D5
E5
F5
G5
H5
J5
K5
L5
M5
N5
P5
A4
B4
C4
D4
E4
F4
G4
H4
J4
K4
L4
M4
N4
P4
A3
B3
C3
D3
E3
F3
G3
H3
J3
K3
L3
M3
N3
P3
A2
B2
C2
D2
E2
F2
G2
H2
J2
K2
L2
M2
N2
P2
A1
B1
C1
D1
E1
F1
G1
H1
J1
K1
L1
M1
N1
P1
A8
B8
C8
D8
E8
K8
L8
M8
N8
P8
22 28
14 8
15
1-875-098-
12
(12)
MAIN BOARD (SIDE A)
(NC)
MAIN BOARD (SIDE B)
1-875-098-
12
(12)
1
3
6
4
1
5
8
4
1
3
1
3
54
21
3
5
4
1
3
5
4
1
3
5
4
1
3
54
13
5
4
1
8
54
S
D
G
BLK
WHT
GRN
RED
RED/GRN
DARK BLU
NATURAL
BLU
NATURAL
BLU
BLK
RED/DARK BLU
YEL
RED
NATURAL
(US, CND, JE) (EXCEPT US, CND, JE)
NATURAL/GRN
NATURAL
A1
CHARGER
BOARD
A2
CHARGER
BOARD
SP201
(R-CH)
MIC201
NOISE DETECT
(R-CH)
NATURAL
BLU
MIC231
MONITOR
(R-CH)
POWER
BOARD
HOUSING
PLATE
MODE
BOARD
RESET
BOARD
GRNRED
NATURAL NATURAL
A
B
C
D
E
F
G
12345678910
A
KK
Note: IC501, IC551, IC601, IC801 and IC802 on the MAIN board cannot exchange with single. When these parts on
the MAIN board are damaged, exchange the entire mounted board.
5-3. PRINTED WIRING BOARD - MAIN Board - • : Uses unleaded solder.
• See Page 15 for Circuit Boards Location.
Ref. No. Location
• Semiconductor
Location
D101 B-7
D102 C-7
D103 B-8
D104 B-8
D131 B-8
D132 B-8
D133 B-9
D134 B-9
D162 F-9
D163 F-9
D164 F-9
D165 F-9
D201 C-7
D202 C-8
D203 D-7
D204 D-8
D231 D-9
D232 D-8
D233 C-9
D234 C-9
D262 F-10
D263 F-10
D264 F-10
D265 F-10
D801 D-2
D802 D-3
IC181 D-10
IC182 D-10
IC183 D-9
IC184 D-10
IC281 C-9
IC282 B-9
IC283 A-8
IC284 A-9
IC301 C-8
IC361 E-10
IC471 D-8
IC472 F-8
IC473 E-7
IC501 C-5
IC551 B-4
IC601 E-3
IC801 C-2
IC802 C-3
Q130 B-8
Q230 D-8
Q472 E-8
Q473 E-8
Q474 G-8
Q475 G-9
Q476 D-8
Q801 C-2
Q802 B-2
(Page 20) (Page 20)

MDR-NC500D
MDR-NC500D
1717
TP133
TP233
TP333
TP103
TP203
TP104
TP204
TP162
TP262
Q473
Q230
Q130
D101 D102
D103 D104
D131 D132
D133 D134
D162 D163
D164 D165
D201 D202
D203 D204
D231 D232
D233 D234
D263
D264 D265
IC471
Q474
Q475
Q476
Q472
IC472
IC473
C470
FB472
C472
C471
FB361
FB261
FB161
FB102
FB132
FB101
FB131
FB183
FB182
TP473
R471
R472
TP478
TP479
C475
R495
R494
R478
C478
R480
L471
L472
C482
C495
C483
R482 C480 C481
TP474
C479R481
R499
TP475
R492
R490
C476 C477 C494
R496
C484 C485 R484
R485 C486
R486
L473
4.7µH
C496 R470
L474
R487 C487
C488
C489
TP476
C497
C490
TP477
C492
C498
R493
R469
FB201
FB232
FB202
FB231
C231
C201
C202
R201
C203
C204
R203R202
R206
R205
R208
R207
RV201
R231
C232
C230
R230
C233
R232 R233 R235
C235 R236
R238
C234
C302
C301
R457 R477
C102
C103
R102R101 R103
C104
RV101
RV101
CANCELING GAIN
R107
R108
C132
R131
R105
R106
R133
C130
C133
R130
R132
C134
R140
C135
R136
R135
R177
R137
R138
R237
R277
R272
R172
C363
C264
R271
C362C361 C164
R171
R169
C163 R167
R174 R168 R164
C161
R163
C162
R266
R267
D262
C263
R274R162
R262
R261R161
C261
R263
C262
R264
R269
R268
R166
R491
SL201
SL101
R211
R111
C474
C499
FB471
TP182
TP183
TP131
TP132
TP101
TP102
TP837
TP161
TP261
TP361
TP471
TP472
R479
R488
TP201
TP202
TP232
TP231
MIC201
R240
IC301
IC361
MIC231
TP238
2SC2712L
2SD2654
2SD2654
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380 1SS380
1SS380
1SS380 1SS380
XC61GN3002HR
SCH2401
DTC115TE
2SD2654
CPH3303
LTC3547B
LTC3547B
2200p
0
0.1
100
10V
0
0
0
0
0
0
10k
470k
0.1
100k
47k
220k
33p
330k
22
10V
10
0.01
33k 22
10V 0.01
33p150k
0
100
470k
47
10V
0.01 10
0
47
10V
0.01 750k
750k 33p
470k
10 0
750k 33p
22
10V
0.01
10
22
10V 0.01
0.1
10k
100k
0
0
0
0
4700p
4700p
0.1
2.7k
2.2
10p
3.9k10k
1k
0
0
22k
47k
2.7k
0.1
4.7
10V
47k
2.2
10k 4.7k 0
10p 1k
0
0.1
10
10V
0.1
1M 220k
0.1
2.2
10k2.7k 3.9k
10p
47k
22k
0
0.1
2.7k
0
1k
4.7k
4.7
10V
2.2
47k
10k
0.1
0
10p 1k
0
100
10k
0
10k
100 4.7k
4.7k
0.1
0.1
4.7k
10
10V
0.1 0.1
4.7k
0
330p 1k
22k 4.7k 22k
0.15
0
0.01
0
1k
1SS380
330p
22k1k
1k
3939
0.15
0
0.01
22k
0
4.7k
0
100
0
0
100
10V
0.01
0
330k
200k
0
NJM2734
NJM2734
A01
A02
A03
A04
A05
A06
A07
A08
A09
A10
A12
A13
A14
A15
A16
A17
A11
DSP-GND
D-GND
LCHV+
DD_CE
LI-ION
D-2.8V
D-1.35V
D/U(+)
D/U(-)
MIC(FF) SIG
MIC(FF) GND
MIC(FB) SIG
MIC(FB) GND
SOUND(L)
SOUND(R)
SOUND(GND)
U-COM
VDD
GND
(1/3)
B+ SWITCH
Q472,473
S
DC/DC CONVERTER
DC/DC CONVERTER
VOLTAGE
DETECT
SWITCHING
AMP
(R-CH)
NOISE DETECT
(R-CH)
MONITOR
MIC BIAS
LINE AMP
MIC BIAS
LINE AMP
OFF SWITCH
INVERTER
HOUSING
PLATE
4.7µH
4.7µH
4.7µH
RV201
CANCELING GAIN
5-4. SCHEMATIC DIAGRAM - MAIN Board (1/3) - • See Page 15 for Waveforms. • See Page 22 for IC Block Diagrams.
(Page 18)
(Page 19)
(Page 21)

MDR-NC500D
MDR-NC500D
1818
TP502
TP505
TP184
TP284
TP281
TP189 TP190
TP289 TP290
TP181
TP504
TP503
TP552
TP553
IC281
IC282
IC283
L552
R273
R173
R556
R557
C558
C557
C559
C560
R555
C553 C556
C552 C555 FB552
FB553
R554
R553
R560
R551
TP551
C554C551
L551
10µH10µH
R113
R112
R213
R212
C510
C508
C509
C511
R506 R507
C503
C506
FB504
FB501
FB502 FB503
R503 R504
R510
R501
C512 C513 C501
C504
C502
C505
L502 TP506
R502
TP501
C283
C282
IC182
IC183
R196
C181
R181 R193
R197 R194 R180
R182 R190
C189
R192
C190
C194
R198
C192
R176 C191 R186
C187 R159
R187
R188
C188
R189
C184
C185
R184
R183
C186
R185
RV182 RV182
AMP GAIN
R381
R283
R285
C286
RV282
R284
R293R280R294R297
R278
C290
R296 R281
C294
R292 R282 R290
C289
C291 R286R276
C292
R298
FB282
FB283
C287
R287 R288
R259
C288
R289
C285
C284
SP201
L501 10
µ
H
10
µ
H
R279
C281
C183
C182
R178
R179
IC184
IC284
TP282
TP283
IC551
R509
X501
IC501
IC181
FB551
TC7SB66FU
TC7SB66FU
TC7SB66FU
0
0
10k
10k
10
10V
0.1 0.1
10
10V
0
0.1 0.1
10
10V
10
10V
0
0
100
10k
220
0.10.1
0
0
0
0
0.1
0.1
10
10V
10
10V
10k 10k
0.1
0.1
00
100 22
220
220
27p 27p 0.1
0.1
10 10V
10 10V
0
0.1
0.1
TC7SB66FU
TC7SB66FU
0
0.1
22k 0
330k 0 33k
12k 0
47000p
12k
2200p
33000p
1M
0.01
4.7k 0.22 22k
0.1 4.7k
10k
22k
2200p
22k
10 10V
0.1
6.8k
4.7k
2200p
10k
22k
100k
4.7k
10k
2200p
22k
6.8k
033k0330k
1M
2200p
0 22k
33000p
12k 12k 0
47000p
0.22 22k4.7k
0.01
1M
0
0
0.1
10k 22k
4.7k
2200p
22k
0.1
10
10V
1M
0.1
0.1
0.1
1M
1M
TLV4113
TLV4113
TLV320AIC23B
1k
12.288MHz
TLV320AIC23B
TC7SB66FU
0
A01
A02
A03
A04
A05
A06
A07
A08
A09
A10
A12
A13
A14
A15
A16
A17
A11
BCK
MCK
LRCK
DR1
DR2
SDA
SCLK
AMUTE
DX2
HYB_MIX
FF_MIX
MON_MIX
BCK2
LRCK2
BCK
LRCK
SDA SDA
MON_MIX
FF_MIX
HYB_MIX
AMUTE
SCLK
SDA
DX2
DR2
DR1
LRCK
BCK
MCK
DX2
MON_MIX
MON_MIX
FF_MIX
FF_MIX
HYB_MIX
HYB_MIX
AMUTE
MCK SCLK
SCLK
MCK
DR1
BCK2
LRCK2
BCK2
LRCK2
DR2
(2/3)
AUDIO SWITCH
AUDIO SWITCH
AUDIO SWITCH
AUDIO SWITCH
AUDIO SWITCH
AUDIO SWITCH
POWER AMP
GND
2SD
1SD
GND
2SD
1SD
VDD VDD
(R-CH)
STEREO AUDIO
CODEC
STEREO AUDIO
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
GND
VCC
POWER AMP
CODEC
RV282
AMP GAIN
5-5. SCHEMATIC DIAGRAM - MAIN Board (2/3) - • See Page 15 for Waveforms. • See Page 22 for IC Block Diagrams.
Note: IC501 and IC551 on the MAIN board cannot exchange with single. When these parts on the MAIN board are
damaged, exchange the entire mounted board.
(Page
19)
(Page
17)

MDR-NC500D
MDR-NC500D
1919
TP811
TP814
TP815
TP816
TP817
TP830
SL801
SL803
TP833
SL802
TP839
TP613
D802
L601
Q801
Q802
IC802
D801
L602
C633
C634
C635
C636
C637
C638
C640
C641
C642
C643
C644
C651
C645
C650
C646
C647
C648
TP835
TP834
C652
R600 R601
C601
R602 R603
C602
C603
FB601
R606
C656
C604
C605
R605
R604
C606
C657
R608
C658
C659
C607
C608
R610
C610
C661
R609
R611 R612
R643
C611 C612 C613 C614
C663
R613
C665
R614 C664
R636
R615
R619
R620
C669
C616
FB621
R642
C617
R633
R621
C615
R616
R617
R618
R624
C670
C620
R630
C621
R637
C622
R638
C623
R640
R634
C672
R635
R639
C671
C817
R818
C808
R815
R814
R813
R811
C815
R809
C816
R824
R812
R810
C810
C812
CN405
R837
C814
R808 C807
R843R807
R805
R804
R806
C806
R803
R821
R820
FB813
C818
C819
L801
C823
C822 C821
C801
C813
R826
R827
R801
C802
C803
R836
C820
R830
R835
R829
R832
R823
R833 R834
TP809
TP806
TP801
TP808
TP802
TP804
TP803
TP805
TP807
TP832
CN801
R822
FB810
R819 C809 R817
TP838
C624C625
R641
R626C626
C627
R628
R627R629
C630 C629 C628
R631
C631
C673
C674C632
R632
R607
R644
IC601 FB812
R840
R838
FB811
TP827
TP813
TP812
R842
TP810
TP826
R828
C649
C639
IC801
RB715W
DTC144EUA
DTC144EUA
XC61FN2512MR
HZU3BLL
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
10
6.3V
100
10V
10
10V
100
10V
0.1
0.1
0.1
10µH
10µH100p
1k 0
0.1
00
0.1
0.1
0
10k
1000p
0.1
0.1
100
0
0.1
1000p
0
100p
100p
0.1
0.1
0
0.1
100p
0
00
10k
0.1 0.1 0.1 0.1
1000p
10k
100p
10k 1000p
1k
0
1k
10k 1000p
0.1
0
10k
0.1
0
100
0.1
0
0
0
10k
1000p
0.1
1k
0.1
1k
0.1
1k
0.1
0
47k
100p
47k
0
100p
100p
100k
0.1
100
100
100
1k
100p
10k
100p
10k
10k
10k
1000p
1000p
8P
100k
1000p
47k 1000p
1k1k
47k
10k
1k
1000p
10k
100
100
0
1000p
1000p
0.1
0.1 10
6.3V
1000p
100p
1k
1k
4.7k
1
0.1
0
0.1
47k
0
1k
47k
1k
10k 10k
10P
1k
0
75k 0.01 2.7k
0.10.1
0
47k1000p
0.1
10k
10k1k
0.1 0.1 0.1
1k
0.1
1000p
1000p0.1
1k
10k
10k
TMS320VC5503ZHH 0
10k
10k
0
1k
1k
0.1
0.1
-UET-A
µPD78F0527GB (S)
BCK
LRCK
DR1
DR2
SDA
AMUTE
DX2
D-GND
SCLK
HYB_MIX
FF_MIX
MON_MIX
LI-ION
DD_CE
LCHV+
MCK
DSP-GND
BCK2
LRCK2
D-1.35V
D-2.8V
RES_DSP
BCK
DR2
LRCK
LRCK
DX2
BCK
AMUTE
SDA
SCLK
CLK0
FSX0
CLK0
HYB_MIX
FF_MIX
MON_MIXMCK
INT0
INT1
BCK2
LRCK2
MCK
BCK
LRCK
BCK2
LRCK2
DR1
DR2
DX2
SDA
SCLK
AMUTE
HYB_MIX
FF_MIX
MON_MIX
INT0
INT1
FSX0
FSR0
DX0
DR1
GPIO5
DR0
CLK0
DX0
DR0
RES_DSP
GPIO4
GPIO5
GPIO4
FSR0
GND
CLK
DATA
FLMD0
RESET IN
Txd
Vdd
Rxd
RESET OUT
GND
VOUT
GND
VDD
Lch V+
DDconCE
D-GND
Li-ion
DSP-GND
(3/3)
SYSTEM CONTROLLER
CSP
(Chip Size Package)
LED DRIVE
LED DRIVE
BOARD
BOARD
RESET
MODE
(NC)
BOARD
POWER
NC
RESET SIGNAL
GENERATOR
DSP
D-1.35V
D-2.8V
10µH
5-6. SCHEMATIC DIAGRAM - MAIN Board (3/3) - • See page 23 for IC Pin Function Description.
Note: IC601, IC801 and IC802 on the MAIN board cannot exchange with single. When these parts on the MAIN board
are damaged, exchange the entire mounted board.
(Page
18)
(Page
17)

MDR-NC500D
MDR-NC500D
2020
TP107
TP187
TP188
C101
TP136
TP137
R401
C414
C131
Q401
R429
IC401
R416
C404
R432
R427
R428
R431
Q404
C403
R415
Q403
C411
R404
C416
R403
R430
R426
C402
R402
R417
TP108
R420
R421
R423
IC404
IC403
R424
Q402
R419
R413
C412
C415
C417
IC402
TH401
C413
C408
C410
R412
C418
R411
R410
C409
R414
C405
L401
D403
C406
R434
TP836
R435
Q405
TP185 TP186
TP105 TP106
TP134
TP135
TP411
C401
CN403
IC405
D402
TP163
TP263
TP363
TP412
TP401
TP402
CN402
TP403
TP406
C421
1-875-099-
11
(11)
1-875-099-
11
(11)
CHARGER BOARD
(SIDE B)
CHARGER BOARD
(SIDE A)
1
2
LITHIUM
ION BATTERY
3.7V 1,260mAh
1
2
3
1
23
12
3
S
D
G
RED
NATURAL
NATURAL
BLU
BLU
NATURAL
SP101
(L-CH)
MIC101
NOISE DETECT
(L-CH)
MIC131
MONITOR
(L-CH)
BLK
BLK
BLK
WHT
DARK BLU
BLU
NATURAL
RED/GRN
YEL
RED/DARK BLU NATURAL
NATURAL/GRN
GRN
A1
MAIN
BOARD
HOUSING
PLATE
JACK
BOARD
RED
RED
A
B
C
D
E
1234 5
5-7. PRINTED WIRING BOARD - CHARGER Board (US, CND, JE models) -
• : Uses unleaded solder.
• See Page 15 for Circuit Boards Location.
Note: IC402 on the CHARGER board cannot exchange with single. When this part on the
CHARGER board is damaged, exchange the entire mounted board.
(Page 16)
Ref. No. Location
• Semiconductor
Location
D402 C-3
D403 D-2
IC401 C-5
IC402 E-5
IC403 C-5
IC404 B-5
IC405 C-3
Q401 C-4
Q402 C-5
Q403 D-4
Q404 D-4
Q405 C-3
TP107
TP187
TP188
C101
TP136
TP137
R401
C414
C131
Q401
R429
IC401
R416
C404
R432
R427
R428
R431
Q404
C403
R415
Q403
C411
R404
C416
R403
R430
R426
C402
R402
R417
TP108
R420
R421
R423
IC404
IC403
R424
Q402
R419
R413
C412
C415
C417
IC402
TH401
C413
C408
C410
R412
C418
R411
R410
C409
R414
C405
L401
D403
C406
R434
TP836
R435
Q405
TP185 TP186
TP105 TP106
TP134
TP135
TP411
C401
CN403
IC405
D402
TP163
TP263
TP363
TP412
TP401
TP402
CN402
TP403
TP406
C400
C423
1-875-099-
21
(21)
1-875-099-
21
(21)
CHARGER BOARD
(SIDE B)
CHARGER BOARD
(SIDE A)
1
2
LITHIUM
ION BATTERY
3.7V 1,260mAh
1
2
3
1
23
12
3
S
D
G
RED
NATURAL
NATURAL
BLU
BLU
NATURAL
SP101
(L-CH)
MIC101
NOISE DETECT
(L-CH)
MIC131
MONITOR
(L-CH)
BLK
BLK
BLK
WHT
DARK BLU
BLU
NATURAL
RED/GRN
YEL
RED/DARK BLU NATURAL
NATURAL/GRN
GRN
A2
MAIN
BOARD
HOUSING
PLATE
JACK
BOARD
RED
RED
A
B
C
D
E
1234 5
5-8. PRINTED WIRING BOARD - CHARGER Board (Except US, CND, JE models) -
• : Uses unleaded solder.
• See Page 15 for Circuit Boards Location.
(Page 16)
Note: IC402 on the CHARGER board cannot exchange with single. When this part on the
CHARGER board is damaged, exchange the entire mounted board.
Ref. No. Location
• Semiconductor
Location
D402 C-3
D403 D-2
IC401 C-5
IC402 E-5
IC403 C-5
IC404 B-5
IC405 C-3
Q401 C-4
Q402 C-5
Q403 D-4
Q404 D-4
Q405 C-3