Sony MDR NC50 User manual

SERVICE MANUAL
NOISE CANCELING
HEADPHONES
US Model
Canadian Model
AEP Model
UK Model
E Model
Tourist Model
SPECIFICATIONS
MDR-NC50
Ver. 1.3 2006.08
9-879-314-04
2006H05-1
© 2006.08
Sony Corporation
Personal Audio Division
Published by SonyTechno Create Corporation
Note on chip component replacement
•Never reuse a disconnected chip componet
•Notice that the minus side of a teamtalum capacitor may be damaged by
heat
General
Type Dynamic, closed
Driver units 40 mm, dome type
Power handling capacity 100 mW
Impedance 40 Ωat 1 kHz (when the power is on)
100 Ωat 1 kHz (when the power is off)
Sensitivity 102 dB/mW (when the power is on)
100 dB/mW (when the power is off)
Frequency response 14 −22,000 Hz
Frequency range of active noise attenuation
40 −1,500 Hz, more than 14 dB at 300 Hz
Power source DC 1.5 V, 1 ×R03 (size AAA) battery
Mass
Approx. 290 g (11 oz) including battery
Supplied accessories
Connecting cord (0.5 m, gold-plated stereo mini plug (1) (Tourist only),
1.5 m, gold plated L type stereo mini plug (1)), R03 (size AAA) dry
battery (1) (Tourist only), Carrying case (1), Plug adaptor for in-flight
use* (single/dual) (1), Gold-plated unimatch plug adaptor (stereo phone
plug ystereo mini jack) (1), Operating Instructions (1)
* May not be compatible with some in-flight music services.
Design and specifications are subject to change without notice.
Battery
Sony alkaline LR03/AM-4 (N)
(size AAA) battery
Sony manganese R03/ UM-4
(NU) (size AAA) battery
Approx. hours*
1
30 hours*
2
15 hours*
2
Battery life
*
1
1 kHz, 1 mW + 1 mW input
*
2
Time stated above may vary, depending on the temperature or conditions of use.
When to replace the battery
Replace the battery with a new one when the POWER indicator dims.
The noise canceling feature may not work correctly if battery power is low.
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.

2
MDR-NC50
TABLE OF CONTENTS
1. GENERAL ................................................................... 3
2. DISASSEMBLY
2-1. Disassembly Flow ........................................................... 4
2-2. ML Board ........................................................................ 4
2-3. MR Board ........................................................................ 5
2-4. Ornamental Cap (L)/(R) .................................................. 5
2-5. Position of lead Wires...................................................... 6
2-6. L/R Transition Cord Location ......................................... 6
2-7. Position Of Lead Wires
At Front Plate (L)/(R) Sub Assy ...................................... 7
3. ELECTRICAL ADJUSTMENT ............................. 8
4. DIAGRAMS ................................................................. 9
4-1. Block Diagram ................................................................ 11
4-2. Printed Wiring Board – L-CH Board – ........................... 12
4-3. Printed Wiring Boards – R-CH Board –.......................... 13
4-4. Schematic Diagram ......................................................... 14
5. EXPLODED VIEWS
5-1. Overall Section ................................................................ 15
5-2. Housing (L) Section ........................................................ 16
5-3. Housing (R) Section ........................................................ 17
6. ELECTRICAL PARTS LIST................................ 18

3
MDR-NC50
SECTION 1
GENERAL
Features
Installing a battery
1Open the right housing, as illustrated.
2Open the lid of the battery box of the
headphone to insert one size AAA battery.
3Close the lid.
Match the eon
the battery to the
ein the battery
case.
LR
Listening to music
1Connect the headphones to the AV
equipment.
* “WALKMAN” is a registered trademark of Sony
Corporation to represent Headphone Stereo products.
2Turn on the power on the right side of the
headphones.
The POWER indicator lights in red. When the
power is turned on, ambient noise is reduced,
and you can listen to music more clearly at a
lower volume.
When connecting to the stereo mini jack of the remote
control’s jack supplied with a WALKMAN*, etc
WALKMAN*, etc
Remote control
Connecting cord
0.5 m (supplied)
When connecting to the
stereo mini plug of a
WALKMAN*, etc
Headphones
LR
ON OFF
Connecting cord
1.5 m (supplied)
Noise canceling microphone
RL
for dual jacks for stereo mini jacks
3Put on the headphones so that the ear pads
cover your ears.
4Turn on the power of the AV equipment.
Hearing environmental sound for safety.
Playback is muted while the MONITOR switch is
pushed so you can hear the surrounding
environment.
Note
The environmental sound might not be heard if the
microphone is covered with your fingers.
Notes on using on the
airplane
•The supplied plug adaptor can be connected to dual
and stereo mini jacks.
•Do not use the headphones when use of electronic
equipment is prohibited or when use of personal
headphones for in-flight music services is prohibited.
If you have any questions or problems concerning the
system that are not covered in this manual, please consult
the nearest Sony dealer.
LR
monitor microphone
MONITOR
switch
(Except Tourist)
(Tourist only)
LR
When connecting to the stereo
mini jack of the remote control’s
jack supplied with a WALKMAN*,
etc.
Remote control
When connecting to the
stereo mini jack of a
WALKMAN*, etc.
Connecting cord
1.5 m (supplied)
Headphones
To headphone jack on
airplane seats
Plug adaptor (supplied)
When connecting to dual
or stereo mini jacks of
in-flight music services.
Note
•Insert the plug in the jack until you hear a click.
•To disconnect the cord, pull it out by the plug, not the
cord, as the inner conductors may break.
• Noise cancelling headphones reduce ambient
noise, and provide a quieter environment to
enhance audio entertainment.
Ambient sound is synthesized with an anti-
sound signal produced by the noise cancelling
circuit, and reduced. (Over 14 dB is reduced at
300 Hz.)
• Slim, folding design for easy portability.
• Neodymium magnets for powerful sound.
• Passive operation when noise-canceling circuit
is not activated.
• Built-in monitor function to hear surrounding
sound without taking off the headphones.
• Supplied plug adaptor for easy connectivity to
stereo or dual jack of in-flight music services.
This section is extracted from
instruction manual.
Ver. 1.1

4
MDR-NC50 SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. DISASSEMBLY FLOW
SET
2-2. ML BOARD
(Page 4)
2-4. ORNAMENTAL CAP (L)/(R)
(Page 5) 2-4. ORNAMENTAL CAP (L)/(R) (Page 5)
2-3. MR BOARD
(Page 5)
Note: Follow the disassembly procedure in the numerical order given.
2-2. ML BOARD
qd Remove thirteen solders.
2 two screws
(B2.6)
1 screen
3 two screws
(B2.6)
4 front plate (L)
assy
5 packing housing
qg ML board
0 claw
qa claw
9 Remove the ring (L) block
in the direction of arrow.
qs button monito
r
6 three screws
(B2.6)
7 sheet (housing)
8 claw
qf claw

5
MDR-NC50
2-3. MR BOARD
8 ring (R) block
qa MR board
6 two screws
(B2.6)
5 packing housing
3 two screws
(B2.6)
1 screen
2 two screws
(B2.6)
4 front plate (R)
assy
7 screw
(B2.6)
q; two claws
9 Remove thirteen solders.
2-4. ORNAMENTAL CAP (L)/(R)
3 ornamental cap (R)
Take care not to break the claw when mounting or demounting the ornamental cap (L)/(R).
3 ornamental cap (L
)
1 claw
1 claw
2 ring (R)
2 ring (L)
1 claw
1 claw
1 claw
1 claw

6
MDR-NC50
2-5. POSITION OF LEAD WIRES
– MR board –– ML board –
BATT
NATURAL
MIC102
RED
RV101
SP101
GREEN
RED
NATURAL
RED
BLACK
RED
sheet (housing)
sheet
(housing)
LED
BLACK
MIC101
NATURAL
RED
NATURAL
RV102
RED
L/R transition
cord
jack
(small type)
MIC2
RED NATURAL
MIC1
RV1
RED
NATURAL
SP1
L/R transition
cord
RED
button monitor
BLACK
NATURAL
GREEN
RED
GREEN
NATURAL
RV2
RED
NATURAL
SW transition
cord
2-6. L/R TRANSITION CORD LOCATION
head band assy
guide slider (L)/(R)
hanger (L)/(R)
L/R transition cord
L/R transition cord is inserted
in the slot inside a hanger.

7
MDR-NC50
2-7. POSITION OF LEAD WIRES AT FRONT PLATE (L)/(R) SUB ASSY
front panel sub assy (R)
MIC102
SP101
MR boar
d
front plate sub assy (L)
MIC2
SP1
MIC2
SP1
ML boar
d

8
MDR-NC50
NOISE CANCELING VOLUME ADJUSTMENT
Preparation:
Procedure:
1. Generate a sine wave of specific frequency (250 Hz) from a
AFoscillator,andoutput itfroma speakerplaced attheforward
position.
2. Remove the ORNAMENTAL CAP.
3. Mount this set on the head, and turn on the POWER switch.
4. With this set mounted, rotate the RV1 (Lch) and RV101 (Rch)
so that the volume from the speaker becomes lowest aurally.
Adjust the RV1 (L-CH) or RV101 (R-CH) to the position by
rotating30 to45degreesclockwise from themechanicalcenter.
5. After adjustment, push and detach the ear receivers to and
from your ears, and use the ear receivers at the position a little
away from your ears to check that a peep howling does not
occur.
If a howling occurred, rotate the RV2 (L-CH) or RV102 (R-
CH) counterclockwise to reduce the volume. As a result of
the reduced volume on either side (RV2 or RV102), if you
feel that the left and right balance is disordered, reduce the
volume on another side until your feeling that something is
wrong is eliminated, so that both sides are balanced.
Adjustment Location:
AF oscillator
sine wave 250 Hz
amplifier
speake
r
+
–
SECTION 3
ELECTRICAL ADJUSTMENT
– ML Board (Side A) –
RV2
RV1
RV101
RV102
– MR Board (Side A) –
mechanical center adjusted position
(reference)

9
MDR-NC50
SECTION 4
DIAGRAMS
•NoteforPrintedWiring Boards andSchematic Diagrams
Note on Schematic Diagram:
•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 1/4W or less unless otherwise specified.
•C: panel designation.
•A: B+ Line.
•H: adjustment for repair.
•Power voltage is dc 1.5 V and fed with regulated dc power supply
from battery terminal.
•Voltages and waveform is dc with respect to ground under no-sig-
nal conditions.
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
•Waveform is taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
•Circled numbers refer to waveform.
•Signal path.
F: Audio signal (power off)
J: Audio signal (power on)
N: Monitor
Note on Printed Wiring Boards:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•: Pattern from the side which enables seeing.
(The other layer's pattens are not indicated.)
•Waveform
1
ML Board IC52 5(EXT),
MR Board IC152 5(EXT)
1 V/DIV, 5 µ s/DIV
10 µ s2.1 Vp-p
•IC Block Diagrams
ML Board IC1
MR Board IC101
R1160N101B-TR-FA
ML Board IC6
MR Board IC106
LM4916LDX/NOPB
ML Board IC52
MR Board IC152
XC9103D091MR
CLICK-POP &
MODE CONTROL
LOGIC
BIAS
GENERATOR
–
+
OUT B
7
GND
6
VDD
10
SE/BTL
8
OUT A
9
IN A 1
–
+
IN B 5
SD 2
MUTE 3
BYPASS 4
1
2
VDD
GND
CE
REGULATOR
CURRENT
LIMIT
3
VOUT
5
ECO
4
EXT
5
GND
4
FB 1
VDD 2
CE 3
CURRENT
RIPPLE DETECT
& FB
+
–
ERROR AMP
+
–
PWM COMPARATOR
VREF WITH
SOFT START
& CE
RAMP WAVE
GENERATOR,
OSC
PWM/PFM
CONTROLLER
PHASE
COMPENSATION
BUFFER,
DRIVER
VCC

10
MDR-NC50
MEMO

MDR-NC50
1111
MDR-NC50
4-1. BLOCK DIAGRAM
OFF ON
B+ SWITCH
Q151, 152
DC/DC CONVERTER
IC152, Q153
SWITCH
Q1, 2
NOISE CANCEL
VOLUME (L)
MIC AMP
IC2
BUFFER
IC3
BUFFER
IC4 MONITOR SWITCH
IC5
VOLTAGE
DETECT
IC151
B+1V (L)
SP1
(L-CH)
RV1
MIC2
(NOISE DETECT)
J1
(INPUT)
S1
MONITOR
S301
B+2V (R)
POWER
D201
POWER
MIC1
(MONITOR)
RV2
(VOLUME)
POWER AMP
IC6
• SIGNAL PATH
: AUDIO (POWER ON)
: AUDIO (POWER OFF)
: MONITOR
+
SWITCH
Q101, 102
NOISE CANCEL
VOLUME (R)
MIC AMP
IC102
BUFFER
IC103
BUFFER
IC104 MONITOR SWITCH
IC105
B+1V (R)
B+2V (L)
SP101
(R-CH)
RV101
MIC102
(NOISE DETECT) MIC101
(MONITOR)
RV102
(VOLUME)
POWER AMP
IC106
+
DRY BATTERY
SIZE"AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
+1V
REGULATOR
IC101
B+1V (R)
B+1.5V (R) B+ SWITCH
Q154, 155
LED DRIVE
Q201, 202
DC/DC CONVERTER
IC52, Q53
B+2V (L)
+1V
REGULATOR
IC1
B+1V (L)
B+1.5V (L) B+ SWITCH
Q54, 55

MDR-NC50
1212
MDR-NC50
4-2. PRINTED WIRING BOARD – L-CH Section – : Uses unleaded solder.
3
1
5
4
3
1
5
4
C55
Q53
R59
R58 R57
Q55
Q54
R45
R49
C44
R44
R48
R47
C38
L51
R18
RV1
C17
R15
C7 C8
R43
R13
C14
C6
R19
R60
R6
R8
C20
R4
R14
R10
R24
R11
C19
R7
R22
R17
R42
R25
RV2
R33
R50
C26
C25
R31
R12
C27
R32
R34
R23
C29
C30
R1
C21
R35 R30
R36
C28
R38
C1
JW1
R16
R28 C22
R29
R37
R27
R5
C36
C18
Q2
R46
D51
C61
C60
C56
R39
C57
R3
R26
Q1
R61
C35
C33
C24
C16
C13
C40
C41
C43 C58
R41
R55
R54
R56
C59
C37
C45
C42
R62
R63 R64
C11
C4
C46
C47
R65
C63
JW2
C31
C12
R68
C39
IC6
IC4
IC5
IC1
IC2
IC52
IC3
SP1
(L-CH)
BLK
RED
J1
(INPUT)
MIC1
(MONITOR) NATURAL
RED
MIC2
(NOISE DETECT)
NATURAL
RED
GRN RED
3
1
2
4
RED NATURAL
NATURAL
BLK
GRN
S1
MONITOR
1-864-609-
12
(12)
1-864-609-
12
(12)
(SIDE A)
ML BOARD (SIDE B) ML BOARD
1 2 3 4 5 6 7 8 9
A
B
C
D
E
MR BOARD
A
•Semiconductor
Location
Ref. No. Location
D51 B-4
IC1 D-2
IC2 D-3
IC3 C-2
IC4 C-2
IC5 C-2
IC6 B-3
IC52 A-3
Q1 D-4
Q2 C-3
Q53 B-3
Q54 C-3
Q55 B-3

MDR-NC50
1313
MDR-NC50
4-3. PRINTED WIRING BOARDS – R-CH Section – : Uses unleaded solder.
1
1
1
2
1
3
4
3
3
3
2C
1C 1B
E
2B
2C
1C 1B
E
2B
4
4
5
4
5
6
R145
R149
C144
R144
C139
R148
R147
R143
R142
RV102
IC105
C136
R146
R139
C135
C140
C141
R141
C143
C145
R162
D151
D201
C142
R157
R154
R161
C152
Q154
Q155
R156
R158
R159
Q152
Q153
Q202
R205 R206
C202
R204
C203
R203
R202
R201
Q201
C201
C204
C154
C138
L151
R118
RV101
R115
C107
C108
R113
C114
C106
R119
R106
R108
R104
C104
R114
R110
R111
R107
R117
R133
R150
C126
C125
R131
R112
C127
R132
R134
C129
C130
R101 C101
C121
R135
R130
R136
C128
R138
JW101
R116
R128
C122
R129
R137
R127
R105
Q102
C161
C160
C156
C155
R152
R153
R103
Q151
R151
C153
C158
R126
Q101
R155
C133
C124
C116
C113
C159
C137
R163
R164
C111
C146
C147
C157
C131
C112
R166
C165
C163
R165
C120
R168
C118
R123
R125
R124
R122
C119
C117
JW102
IC104
IC102
IC103
IC106
IC101
IC152
IC151
ML BOARD
A
S301
RED
RED
1
2
OFF
ON
POWER
POWER
D201
GRN
3
1
2
4
NATURAL
RED
2
RED
1
RED
BLK
MIC102
(NOISE DETECT)
NATURAL
RED
MIC101
(MONITOR)
NATURAL
RED
NATURAL
RED SP101
(R-CH)
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
1-864-611- 12
(12)
1-864-610- 12
(12)
1-864-610-
12
(12)
(SIDE A)
MR BOARD
SW BOARD
(SIDE B)
MR BOARD
1 2 3 4 5 6 7 8 9
B
A
C
D
E
•Semiconductor
Location
Ref. No. Location
D151 D-3
D201 D-3
IC101 B-5
IC102 C-4
IC103 C-5
IC104 D-5
IC105 D-5
IC106 D-4
IC151 C-3
IC152 D-3
Ref. No. Location
Q101 C-3
Q102 C-3
Q151 D-2
Q152 C-2
Q153 D-3
Q154 D-3
Q155 E-3
Q201 E-3
Q202 E-3

MDR-NC50
1414
MDR-NC50
4-4. SCHEMATIC DIAGRAM •See page 10 forWaveforms. •See page 10 for IC Block Diagrams.
R135
C107
RV2
L51
100 µH
R46
R146
C28
R11
IC1
C8
Q1
R16
R17 R18
Q2
R19
C7R3
R4 R5C1
C4
R1
C55
C56
C57
R55
R57
C60
C59
R54
R56D51
IC52
C24C13C16
R26
C21
R27
R28
C22
R31
C25
R32
C27
R35
C33
R41
IC5
JW1
R42
C36
R60
G
R
L
C39
R44
R45
R62
C40
C41
C42
IC6
C45
R48
R47
R50R49
SP1
C104
C101
C203C202
R158
R159
Q155
C160
R156
R155
C159
R154
C152
C153
C108
C201 R202 R203 R204
C116
R126
R127
R128
C121
C161
R157C157
R206
R205 C204
IC152
C156
C154
L151 D151
C155
R153R152R151
Q151
Q201
R201
C122
R111
C113
Q101
Q102
C139
R116 R117
R119
R118
R143C137
RV102
R161
IC106
R144
R145 R162 C140C141 C142
R147
R148
R150
R149
C145
IC105
R139
C136
R142
JW101R132
C127
R131
C125
C124
R105R104
R103
R101
C128
C129
R141 C133
R58
R59
Q54
C37
R61
R43
SP101
IC101
C29
Q202
J1
C58
S1
Q55
R65 C63 R37 C30
R38R36
IC3
R29
IC4
C31
C35
C38
C43 C44
R63
R64
R30 C26
R33
R34
C6
R6 R7
C46
R8
C12
C11 R10
JW2
RV1
IC2
C14 R13
R12
R166 Q152
C165 D201
IC151
C158
R165 C163
R129
R136
C130
R138
R137
R130
R134
R133
C126
C131
C135
C106
C112
C138
R106 R107
C146
C111 R110
C114
R112R113
IC102
R108
R114 R115
J102
R163
R164
MIC101
MIC102
R68
C18
R22
R122
R125
R23
R25
C20
R24
C19C17
C117 C119
S301
MIC2
MIC1
C143
C144
Q53
C61
R15R14R39
C47
Q153
Q154
IC103 IC104
C147
R168
R124
C120
C118
R123
16k
2.2
10k
22k
22k
0.01
39k
R1160N101B
1
IMX9
1k
1k 1k
IMX9
1k
2.21.2k
1.5k 11000p
1000p
C5
0.047
2.7k
0.01
2204V
0.1
180k
100k
2.2
33p
220k
100kRB161M-20TR
XC9103D091MR
0.10.10.1
16k
0.022
3.3k
16k
0.0015
100k
0.047
1.5k
0.047
16k
0.01
470k
SN74LVC1G3157
0
10k
0.022
4.7k
0.1
47k
47k
220k
4.7
0.1
1
LM4916LDX/NOP
0.033
22k
22k
4.74.7
1000p
C105
0.047
1000p
0.00220.0022
10k
470
2SC2412K
2.2
100k
180k
33p
220k
2204V
0.01
1
1 10k 10k 10k
0.1
16k
3.3k
16k
0.022
0.01
100k0.1
4.7k
330 0.1
XC9103D091MR
220
4V
4.7
RB161M-20TR
0.01
22010k100k
2SB1690K
UMW1N-TR
100
0.0015
39k
0.1
IMX9
IMX9
0.1
1k 1k
1k
1k
2.2k2.2
10k
10k
LM4916LDX/NOP
47k
47k 220k 4.70.1 1
22k
22k
4.7
4.7
0.033
SN74LVC1G3157
2.2k
0.022
10k
01.5k
0.047
100k
0.047
0.1
11.5k
1.2k
2.7k
0.01
0.047
470k 0.01
10k
470
2SB1690K
2.2
10k
2.2k
R1160N101B
0.047
UMA4N-TR
226.3V
2SC2412K
39 22
6.3V
10k 0.0022
56k4.7k
NJM2732RB1
47k
NJM2732RB1
4.7
0.1
10
10V
22
6.3V
22
6.3V
4.7
4.7
2.7k 0.01
820
100
22
6.3V
4.7k 2.2k
0.022
1k
0.47
0.047 22k
0
10k
NJM2732RB1
10
10V 47k
47k
10k 2SC2412K
4.7 CL-196HR
XC61CN1002NR
22
6.3V
39 22
6.3V
47k
47K
0.0022
56k
10k
2.7k
100
820
0.01
4.7
0.1
22
6.3V
0.47
10
10V
4.7k 2.2k
0.022
0.047 22k
10 10V
47k47k
NJM2732RB1
1k
39 10
04.7
4.7
RV101 10k
330k
0.1
47k
47k
10k
10k
10k
0.22
100k
0.0470.047
0.047 0.047
226.3V
226.3V
XP151A13
A0MR
0.01
10392.2k
0.33
BATT
XP151A13
A0MR
2SB1690K
NJM2732RB1 NJM2732RB1
0.33
330k
100k
0.22
0.1
10k
VIN CONT
NC GND
IN-A IN-BMUTESD
GNDVDD
GND
V-OUT ECO
VIN CE
GNDVIN
V-OUT ECO
CE
EXT
V-OUT
VDD
CE
GND
GNDEXT
V-OUT
VDD
CE
PASS
BY
OUT
B
SE/
BTL
OUT
A
VDD OUT
ABTL
SE/ OUT
B
GND
IN-B
PASS
BYMUTESDIN-A
-1-2 -2 -1
-1-2
-2-1
(INPUT)
S
DC/DC
DC/DC
MONITOR Q54,55
VCC
GND
BUFFER
BUFFER
VCC
GND
MONITOR
SWITCH
GND
VCC
VOLUME
POWER AMP
(L-CH)
+1V REGULATOR
NOISE CANCEL
VOLUME(L)
MIC AMP
GND
VCC
SWITCH SWITCH
(MONITOR)
(NOISE DETECT)
Q151,152
Q201,202
LED DRIVE
POWER
VOLTAGE
DETECT
S
DC/DC
CONVERTER
DC/DC
CONVERTER
BUFFER BUFFER MONITOR SWITCH
VCC
GND
VCC
GND
+1V REGULATOR MIC AMP
VCC
GND
-2 -1
-2 -1
SWITCH
SWITCH VOLUME
POWER AMP
(R-CH)
NOISE CANCEL
VOLUME(R)
(MONITOR)
(NOISE DETECT)
POWER
OFF
ON
DRY BATTERY
SIZE"AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
TOTAL CURRENT
18mA
1
4
1
22
1
1
4
B+ SWITCH
CONVERTER
B+ SWITCH
B+ SWITCH
B+ SWITCH
VCC
GND
CONVERTER

15
MDR-NC50
1
17
23
45
45
16
8
9
10
11
12
13
14
15
17
15
housing (L) section
housing (R) section
16
SECTION 5
EXPLODED VIEWS
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
12-318-949-01 ORNAMENTAL CAP (R)
22-318-936-01 HANGER (R)
32-318-943-01 GUIDE SLIDER (R)
42-348-229-01 WASHER
52-547-580-01 SCREW (SWIVEL)
8A-1084-772-A BAND ASSY, HEAD
92-318-945-02 LID (R), GUIDE
10 3-253-143-01 SCREW (B2.6), (+) P TAPPING
11 2-318-944-01 LID GUIDE (L)
12 2-318-942-01 GUIDE SLIDER (L)
13 2-318-935-01 HANGER (L)
14 2-318-948-01 ORNAMENTAL CAP (L)
15 2-190-702-02 PAD, EAR
16 X-2025-449-1 SWIVEL ASSY
17 2-547-581-01 HIMERON (HOUSING)
5-1. OVERALL SECTION
•Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
•The mechanical parts with no reference
numberintheexplodedviews are not supplied.
•Accessories are given in the last of the
electrical parts list.
NOTE:
•-XX and -X mean standardized parts, so they
may have some difference from the original
one.
•Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑↑
Parts Color Cabinet's Color
Ver. 1.3

16
MDR-NC50
5-2. HOUSING (L) SECTION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51 2-348-232-01 SCREEN
52 3-253-143-01 SCREW (B2.6), (+) P TAPPING
53 X-2024-714-1 PLATE (L) SUB ASSY, FRONT
54 2-318-964-01 PACKING HOUSING
55 2-318-937-01 RING (L)
56 A-1080-483-A ML BOARD, COMPLETE
57 2-318-963-01 BUTTON MONITOR
58 2-548-817-01 SHEET (DRIVER)
59 2-318-950-01 HOUSING (L)
60 2-547-578-01 SHEET (HOUSING)
C1 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C4 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
J1 1-794-152-11 JACK (SMALL TYPE) (INPUT)
MIC1 1-542-270-11 MICROPHONE, ELECTRET CONDENSER
(MONITOR)
MIC2 1-542-270-11 MICROPHONE, ELECTRET CONDENSER
(NOISE DETECT)
SP1 1-542-429-11 DRIVER (040F018) (L-ch)
51
52
52
60
59
52
53
54
58
55
56
57
not supplied
SP1
MIC1
C1
MIC2
J1
not
supplied
C4

17
MDR-NC50
5-3. HOUSING (R) SECTION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
101 2-318-938-01 RING (R)
102 A-1080-484-A MR BOARD, COMPLETE
103 2-318-966-01 TERMINAL (-), BATTERY
104 2-348-228-01 SHAFT
105 2-318-961-01 LID BATTERY CASE
106 2-318-965-01 TERMINAL (+), BATTERY
107 2-586-206-01 SHEET (BATTERY CASE LID)
108 A-1080-485-A SW BOARD, COMPLETE
109 3-253-143-01 SCREW (B2.6), (+) P TAPPING
110 2-318-962-01 SWITCH POWER
111 2-318-964-01 PACKING HOUSING
112 X-2024-715-1 PLATE (R) SUB ASSY, FRONT
113 2-348-232-01 SCREEN
114 2-318-951-01 HOUSING (R)
115 2-548-817-01 SHEET (DRIVER)
116 2-547-578-01 SHEET (HOUSING)
C101 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C104 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
MIC101 1-542-270-11 MICROPHONE, ELECTRET CONDENSER
(MONITOR)
MIC102 1-542-270-11 MICROPHONE, ELECTRET CONDENSER
(NOISE DETECT)
SP101 1-542-429-11 DRIVER (040F018) (R-ch)
101
102 103
116
104 105
106
107 108
109
109
109
109
110
114
111
112
115
113
not supplied
not supplied
MIC102
C104
MIC101
SP101
not supplied
C101

18
MDR-NC50 SECTION 6
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
NOTE:
•Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
•-XX and -X mean standardized parts, so they
may have some difference from the original
one.
•RESISTORS
All resistors are in ohms.
METAL: Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F: nonflammable
•Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
•SEMICONDUCTORS
In each case, u: µ, for example:
uA... : µA... uPA... : µPA...
uPB... : µPB... uPC... : µPC...
uPD... : µPD...
•CAPACITORS
uF: µF
•COILS
uH: µH
ML
When indicating parts by reference
number, please include the board.
A-1080-483-A ML BOARD, COMPLETE
*******************
< CAPACITOR >
C5 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C6 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C7 1-165-884-11 CERAMIC CHIP 2.2uF 10% 6.3V
C8 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3V
C11 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C12 1-125-891-11 CERAMIC CHIP 0.47uF 10% 10V
C13 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C14 1-104-851-11 TANTALUM CHIP 10uF 20% 10V
C16 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C17 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C18 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C19 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C20 1-127-715-11 CERAMIC CHIP 0.22uF 10% 16V
C21 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C22 1-162-965-11 CERAMIC CHIP 0.0015uF 10% 50V
C24 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C25 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C26 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C27 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C28 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C29 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C30 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C31 1-100-507-91 CERAMIC CHIP 4.7uF 20% 6.3V
C33 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C35 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C36 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C37 1-165-884-11 CERAMIC CHIP 2.2uF 10% 6.3V
C38 1-104-851-11 TANTALUM CHIP 10uF 20% 10V
C39 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C40 1-100-507-91 CERAMIC CHIP 4.7uF 20% 6.3V
C41 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C42 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3V
C43 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C44 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C45 1-164-677-11 CERAMIC CHIP 0.033uF 10% 16V
C46 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C47 1-128-934-11 CERAMIC CHIP 0.33uF 20% 10V
C55 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C56 1-137-859-11 TANTALUM CHIP 220uF 20% 4V
C57 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C58 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C59 1-162-921-11 CERAMIC CHIP 33PF 5% 50V
C60 1-165-884-11 CERAMIC CHIP 2.2uF 10% 6.3V
C61 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C63 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
< DIODE >
D51 6-500-220-01 DIODE RB161M-20TR
< IC >
IC1 6-705-145-01 IC R1160N101B-TR-FA
IC2 6-706-906-01 IC NJM2732RB1 (TE2)
IC3 6-706-906-01 IC NJM2732RB1 (TE2)
IC4 6-706-906-01 IC NJM2732RB1 (TE2)
IC5 6-707-207-01 IC SN74LVC1G3157DCKR
IC6 6-707-110-01 IC LM4916LDX/NOPB
IC52 6-707-206-01 IC XC9103D091MR
< SHORT >
JW1 1-216-864-11 SHORT CHIP 0
JW2 1-216-864-11 SHORT CHIP 0
< COIL >
L51 1-419-861-21 INDUCTOR 100uH
< TRANSISTOR >
Q1 8-729-043-90 TRANSISTOR IMX9T110
Q2 8-729-043-90 TRANSISTOR IMX9T110
Q53 8-729-052-37 FET XP151A13A0MR
Q54 6-550-363-01 TRANSISTOR 2SB1690KT146
Q55 8-729-901-81 TRANSISTOR 2SC2412K-T-146-R
< RESISTOR >
R1 1-216-826-11 METAL CHIP 2.7K 5% 1/10W
R3 1-216-822-11 METAL CHIP 1.2K 5% 1/10W
R4 1-216-823-11 METAL CHIP 1.5K 5% 1/10W
R5 1-218-446-11 METAL CHIP 1 5% 1/10W
R6 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R7 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R8 1-216-821-11 METAL CHIP 1K 5% 1/10W
R10 1-216-837-11 METAL CHIP 22K 5% 1/10W
R11 1-216-840-11 METAL CHIP 39K 5% 1/10W
R12 1-216-841-11 METAL CHIP 47K 5% 1/10W

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
19
MDR-NC50
MR
R13 1-216-841-11 METAL CHIP 47K 5% 1/10W
R14 1-216-804-11 METAL CHIP 39 5% 1/10W
R15 1-216-797-11 METAL CHIP 10 5% 1/10W
R16 1-216-821-11 METAL CHIP 1K 5% 1/10W
R17 1-216-821-11 METAL CHIP 1K 5% 1/10W
R18 1-216-821-11 METAL CHIP 1K 5% 1/10W
R19 1-216-821-11 METAL CHIP 1K 5% 1/10W
R22 1-216-841-11 METAL CHIP 47K 5% 1/10W
R23 1-216-833-11 METAL CHIP 10K 5% 1/10W
R24 1-216-845-11 METAL CHIP 100K 5% 1/10W
R25 1-216-833-11 METAL CHIP 10K 5% 1/10W
R26 1-218-291-11 METAL CHIP 16K 5% 1/10W
R27 1-216-827-11 METAL CHIP 3.3K 5% 1/10W
R28 1-218-291-11 METAL CHIP 16K 5% 1/10W
R29 1-216-841-11 METAL CHIP 47K 5% 1/10W
R30 1-216-826-11 METAL CHIP 2.7K 5% 1/10W
R31 1-216-845-11 METAL CHIP 100K 5% 1/10W
R32 1-216-823-11 METAL CHIP 1.5K 5% 1/10W
R33 1-216-820-11 METAL CHIP 820 5% 1/10W
R34 1-216-809-11 METAL CHIP 100 5% 1/10W
R35 1-218-291-11 METAL CHIP 16K 5% 1/10W
R36 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R37 1-216-833-11 METAL CHIP 10K 5% 1/10W
R38 1-216-842-11 METAL CHIP 56K 5% 1/10W
R39 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R41 1-216-853-11 METAL CHIP 470K 5% 1/10W
R42 1-216-833-11 METAL CHIP 10K 5% 1/10W
R43 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R44 1-216-841-11 METAL CHIP 47K 5% 1/10W
R45 1-216-841-11 METAL CHIP 47K 5% 1/10W
R46 1-216-837-11 METAL CHIP 22K 5% 1/10W
R47 1-216-837-11 METAL CHIP 22K 5% 1/10W
R48 1-216-837-11 METAL CHIP 22K 5% 1/10W
R49 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R50 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R54 1-216-849-11 METAL CHIP 220K 5% 1/10W
R55 1-216-848-11 METAL CHIP 180K 5% 1/10W
R56 1-216-845-11 METAL CHIP 100K 5% 1/10W
R57 1-216-845-11 METAL CHIP 100K 5% 1/10W
R58 1-216-833-11 METAL CHIP 10K 5% 1/10W
R59 1-216-817-11 METAL CHIP 470 5% 1/10W
R60 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R61 1-216-833-11 METAL CHIP 10K 5% 1/10W
R62 1-216-849-11 METAL CHIP 220K 5% 1/10W
R63 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R64 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R65 1-216-804-11 METAL CHIP 39 5% 1/10W
R68 1-216-851-11 METAL CHIP 330K 5% 1/10W
< VARIABLE RESISTOR >
RV1 1-225-901-21 RES, ADJ, CERMET (3 TYPE) 10K
RV2 1-225-901-21 RES, ADJ, CERMET (3 TYPE) 10K
< SWITCH >
S1 1-771-884-31 SWITCH, TACTILE (MONITOR)
************************************************************
A-1080-484-A MR BOARD, COMPLETE
********************
< CAPACITOR >
C105 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C106 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C107 1-165-884-11 CERAMIC CHIP 2.2uF 10% 6.3V
C108 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3V
C111 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C112 1-125-891-11 CERAMIC CHIP 0.47uF 10% 10V
C113 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C114 1-104-851-11 TANTALUM CHIP 10uF 20% 10V
C116 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C117 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C118 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C119 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C120 1-127-715-11 CERAMIC CHIP 0.22uF 10% 16V
C121 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C122 1-162-965-11 CERAMIC CHIP 0.0015uF 10% 50V
C124 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C125 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C126 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C127 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C128 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C129 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C130 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C131 1-100-507-91 CERAMIC CHIP 4.7uF 20% 6.3V
C133 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C135 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C136 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C137 1-165-884-11 CERAMIC CHIP 2.2uF 10% 6.3V
C138 1-104-851-11 TANTALUM CHIP 10uF 20% 10V
C139 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C140 1-100-507-91 CERAMIC CHIP 4.7uF 20% 6.3V
C141 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C142 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3V
C143 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C144 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C145 1-164-677-11 CERAMIC CHIP 0.033uF 10% 16V
C146 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C147 1-128-934-11 CERAMIC CHIP 0.33uF 20% 10V
C152 1-137-859-11 TANTALUM CHIP 220uF 20% 4V
C153 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C154 1-100-507-91 CERAMIC CHIP 4.7uF 20% 6.3V
C155 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C156 1-137-859-11 TANTALUM CHIP 220uF 20% 4V
C157 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C158 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C159 1-162-921-11 CERAMIC CHIP 33PF 5% 50V
C160 1-165-884-11 CERAMIC CHIP 2.2uF 10% 6.3V
C161 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C163 1-119-750-11 TANTALUM CHIP 22uF 20% 6.3V
C165 1-100-507-91 CERAMIC CHIP 4.7uF 20% 6.3V
C201 1-125-837-11 CERAMIC CHIP 1uF 10% 6.3V
C202 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C203 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C204 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
ML

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
20
MDR-NC50
< DIODE >
D151 6-500-220-01 DIODE RB161M-20TR
D201 8-719-077-09 LED CL-196HR-CD-T (POWER)
< IC >
IC101 6-705-145-01 IC R1160N101B-TR-FA
IC102 6-706-906-01 IC NJM2732RB1 (TE2)
IC103 6-706-906-01 IC NJM2732RB1 (TE2)
IC104 6-706-906-01 IC NJM2732RB1 (TE2)
IC105 6-707-207-01 IC SN74LVC1G3157DCKR
IC106 6-707-110-01 IC LM4916LDX/NOPB
IC151 8-759-690-96 IC XC61CN1002NR
IC152 6-707-206-01 IC XC9103D091MR
< SHORT >
JW101 1-216-864-11 SHORT CHIP 0
JW102 1-216-864-11 SHORT CHIP 0
< COIL >
L151 1-419-861-21 INDUCTOR 100uH
< TRANSISTOR >
Q101 8-729-043-90 TRANSISTOR IMX9T110
Q102 8-729-043-90 TRANSISTOR IMX9T110
Q151 6-550-363-01 TRANSISTOR 2SB1690KT146
Q152 8-729-901-81 TRANSISTOR 2SC2412K-T-146-R
Q153 8-729-052-37 FET XP151A13A0MR
Q154 6-550-363-01 TRANSISTOR 2SB1690KT146
Q155 8-729-901-81 TRANSISTOR 2SC2412K-T-146-R
Q201 8-729-050-11 TRANSISTOR UMW1NTR
Q202 8-729-055-39 TRANSISTOR UMA4N-TR
< RESISTOR >
R101 1-216-826-11 METAL CHIP 2.7K 5% 1/10W
R103 1-216-822-11 METAL CHIP 1.2K 5% 1/10W
R104 1-216-823-11 METAL CHIP 1.5K 5% 1/10W
R105 1-218-446-11 METAL CHIP 1 5% 1/10W
R106 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R107 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R108 1-216-821-11 METAL CHIP 1K 5% 1/10W
R110 1-216-837-11 METAL CHIP 22K 5% 1/10W
R111 1-216-840-11 METAL CHIP 39K 5% 1/10W
R112 1-216-841-11 METAL CHIP 47K 5% 1/10W
R113 1-216-841-11 METAL CHIP 47K 5% 1/10W
R114 1-216-804-11 METAL CHIP 39 5% 1/10W
R115 1-216-797-11 METAL CHIP 10 5% 1/10W
R116 1-216-821-11 METAL CHIP 1K 5% 1/10W
R117 1-216-821-11 METAL CHIP 1K 5% 1/10W
R118 1-216-821-11 METAL CHIP 1K 5% 1/10W
R119 1-216-821-11 METAL CHIP 1K 5% 1/10W
R122 1-216-841-11 METAL CHIP 47K 5% 1/10W
R123 1-216-833-11 METAL CHIP 10K 5% 1/10W
R124 1-216-845-11 METAL CHIP 100K 5% 1/10W
R125 1-216-833-11 METAL CHIP 10K 5% 1/10W
R126 1-218-291-11 METAL CHIP 16K 5% 1/10W
R127 1-216-827-11 METAL CHIP 3.3K 5% 1/10W
R128 1-218-291-11 METAL CHIP 16K 5% 1/10W
R129 1-216-841-11 METAL CHIP 47K 5% 1/10W
R130 1-216-826-11 METAL CHIP 2.7K 5% 1/10W
R131 1-216-845-11 METAL CHIP 100K 5% 1/10W
R132 1-216-823-11 METAL CHIP 1.5K 5% 1/10W
R133 1-216-820-11 METAL CHIP 820 5% 1/10W
R134 1-216-809-11 METAL CHIP 100 5% 1/10W
R135 1-218-291-11 METAL CHIP 16K 5% 1/10W
R136 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R137 1-216-833-11 METAL CHIP 10K 5% 1/10W
R138 1-216-842-11 METAL CHIP 56K 5% 1/10W
R139 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R141 1-216-853-11 METAL CHIP 470K 5% 1/10W
R142 1-216-833-11 METAL CHIP 10K 5% 1/10W
R143 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R144 1-216-841-11 METAL CHIP 47K 5% 1/10W
R145 1-216-841-11 METAL CHIP 47K 5% 1/10W
R146 1-216-837-11 METAL CHIP 22K 5% 1/10W
R147 1-216-837-11 METAL CHIP 22K 5% 1/10W
R148 1-216-837-11 METAL CHIP 22K 5% 1/10W
R149 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R150 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R151 1-216-845-11 METAL CHIP 100K 5% 1/10W
R152 1-216-833-11 METAL CHIP 10K 5% 1/10W
R153 1-216-813-11 METAL CHIP 220 5% 1/10W
R154 1-216-849-11 METAL CHIP 220K 5% 1/10W
R155 1-216-848-11 METAL CHIP 180K 5% 1/10W
R156 1-216-845-11 METAL CHIP 100K 5% 1/10W
R157 1-216-845-11 METAL CHIP 100K 5% 1/10W
R158 1-216-833-11 METAL CHIP 10K 5% 1/10W
R159 1-216-817-11 METAL CHIP 470 5% 1/10W
R161 1-216-833-11 METAL CHIP 10K 5% 1/10W
R162 1-216-849-11 METAL CHIP 220K 5% 1/10W
R163 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R164 1-216-793-11 METAL CHIP 4.7 5% 1/10W
R165 1-216-804-11 METAL CHIP 39 5% 1/10W
R166 1-216-833-11 METAL CHIP 10K 5% 1/10W
R168 1-216-851-11 METAL CHIP 330K 5% 1/10W
R201 1-216-809-11 METAL CHIP 100 5% 1/10W
R202 1-216-833-11 METAL CHIP 10K 5% 1/10W
R203 1-216-833-11 METAL CHIP 10K 5% 1/10W
R204 1-216-833-11 METAL CHIP 10K 5% 1/10W
R205 1-216-815-11 METAL CHIP 330 5% 1/10W
R206 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
< VARIABLE RESISTOR >
RV101 1-225-901-21 RES, ADJ, CERMET (3 TYPE) 10K
RV102 1-225-901-21 RES, ADJ, CERMET (3 TYPE) 10K
************************************************************
A-1080-485-A SW BOARD, COMPLETE
********************
< SWITCH >
S301 1-771-337-21 SWITCH, SLIDE (POWER)
************************************************************
MR