Sony MDR-RF915R User manual

MDR-RF915R/RF945R
SERVICE MANUAL
HEADPHONES
SPECIFICATIONS
US Model
Canadian Model
MDR-RF915R is the component model block one in the MDR-RF915RK.
MDR-RF945R is the component model block one in the MDR-RF945RK.
9-873-137-11
2001E0200-1
© 2001.5
Sony Corporation
Personal Audio Company
ShinagawaTec Service Manual Production Group
Ver 1.0 2001. 05
Photo : MDR-RF945R
MDR-RF915RK MDR-RF945RK
Wireless Stereo Headphones MDR-RF915R MDR-RF945
Transmitter TMR-RF915R TMR-RF945
COMPONENT MODEL NAME FOR MDR-RF915RK/
MDR-RF945RK
Headphones
Power source DC 2.4 V: Built-in rechargeable
battery
Mass Approx. 240 g (8.5 oz.) incl.
built-in rechargeable battery
Built-in Ni-Cd rechargeable battery
Model name NC-AA
Voltage 1.2 V
Capacity 700 mAh
Design and specifications are subject to change without
notice.
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2
MDR-RF915R/RF945R
SECTION 1
GENERAL
1. Check the area of your repair for unsoldered or poorly-sol
deredconnections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularlyt ransis
tors, that were installed during a previous repair.
Point them out to the customer and recommend their
replacement.
4. Look for parts which, through functioning, show obvious
signs of deterioration. Point them out to the customer
and recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270°C
during repairing.
• Do not touch the soldering iron on the same conductor of
the circuit board (within 3 times).
• Be careful not to apply force on the conductor when
soldering
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the
customer.
5 -Turn up the volume to a moderate
level with the VOL control.
Press the TUNING button briefly for
automatic tuning of the headphones.
If you do not receive a clear audio
signal, press it again.
MDR-RF945RK
TUNING
button
VOL control
A
A
Auto power on/off function
When you remove the headphones from your
head, the power turns off automatically. Do not
allow the self adjusting band to be pulled up,
otherwise the headphones will be switched on.
The power turns on.
This section is extracted from
instruction manual.
TABLE OF CONTENTS
Specifications ............................................................................ 1
1. GENERAL ....................................................................... 2
2. DISASSEMBLY
2-1. RX-BASE Board ...................................................... 3
3. ELECTRICAL ADJUSTMENTS.............................. 4
3-1. Free Run Frequency
Check and Adjustment (MRD-RF915R) ....... 5
3-2. Receive Frequency
Check and Adjustment (MRD-RF915R) ....... 5
3-3. Carrier Modulation Check (MRD-RF915R) ............. 5
3-4. Separation Check (MRD-RF915R) ........................... 5
5 -Turn up the volume to a moderate
level with the VOL control, then tune
the headphones in to the frequency o
f
the transmitter with the TUNING
control until you can hear the audio
signal loud and clear.
MDR-RF915RK
Try the above steps 3 and 5 until the
receiving performance becomes better.
TUNING
control
VOL control
B
B
3-5. Free Run Frequency
Check and Adjustment (MRD-RF945R) ......... 6
3-6. Receive Frequency
Check and Adjustment (MRD-RF945R) ......... 6
3-7. Carrier Modulation Check (MRD-RF945R) ...............6
3-8. Separation Check (MRD-RF945R) ............................. 6
4. DIAGRAMS
4-1. Block Diagrams ........................................................... 8
4-2. Schematic Diagram ..................................................... 9
4-3. Printed Wiring Board................................................. 10
5. EXPLODEDVIEWS........................................................11
6. ELECTRICAL PARTS LIST........................................12
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3
MDR-RF915R/RF945R
SECTION 2
DISASSEMBLY
2-1. RX-BASE BOARD
•This set can be disassembled in the order shown below.
3 Remove the
nine solderings.
9 Remove the two solderings.
RX-BASE board
Solder the each lead wires directly to the position as shown
while being cautions of colors.
Precaution for installtion
Precaution for installtion
7 RX-BASE board
q; Switch, push (1 key)
Cover (R), hanger
No.203
No.203 (black)
No.202 (red)
No.201 (green)
No.201
No.204
No.205
No.204
No.202
4 Screw (P 2 × 8)
1 Five screws (P 2 × 6)
2 Set the psuh
switch (1 key).
Suspender
1 Slide the suspender in the
direction of the arrow.
6 Button, tuning
(RF945R)
Claw
Claw
2
5
8
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4
MDR-RF915R/RF945R
No.201
Cover (L), hanger
Cover (L), hanger
No.203
No.201, No.203
No.201, No.203
Groove
Set the lead wires
No.204
No.205
No.202 No.202
No.203
No.201
Set the each lead wires as illustrated below.
Cover (R), hanger
A
B
Cover (R), hanger
Groove
Groove
Groove
Groove
Groove
To the driver (030F032).
To the RX-BASE board
Groove
To the driver (030F032).
B
A
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5
MDR-RF915R/RF945R
SECTION 3
ELECTRICAL ADJUSTMENTS
Notes:
1. Use transmitter with check and adjustment alreadycompleted.
2. On adjusting the headphones section, use the transmitter as a
jig.
Headphones:MDR-RF915R
Transmitter:TMR-RF915R
Procedure:
1. Connect an oscillator with attenuator and terminator (600 Ω)
to the transmitter AUDIO IN-A connector (J402).
2. Connect an AC adapter to the transmitter DC IN 9V jack (J404).
3. Connect a DC 2.4V to the +B power line externally.
4. Connect lead wires to IC301 pin 4, pin 6, pin 7 and GND on
the RX-BASE board.
5. Connect a resistor 33k Ωbetween IC301 pin 4 and pin 7.
6. Connect lead wires to the speakers’ terminals (L+,L-,R+,R-)
on the RX-BASE board.
3-1. Free Run Frequency Check and Adjustment
1. Set the transmitter AUDIO IN-A connector (J402) to no signal.
Note: In this case, operation time is about 5 or 10 minutes.
Perform confirmation for less than 5 minutes.
2. Check the transmitter power indicator (red) lights.
3. Set the transmitter CHANNEL switch to 1.
4. Set the RV303 (TUNE) to the center position.
5. Connect a frequency counter to IC301 pin 4 and GND on the
RX-BASE board, then confirm the frequency within 76kHz
±50Hz
6. When the frequency dose not satisfy the specified value, adjust
the value of the frequency counter to specification by RV301
on the RX-BASE board.
Specified values: 76kHz ±50Hz.
7. Remove a 33 Ω resister between IC301 pin 4 and pin 7.
Setting :
3-2. Receive Frequency Check and Adjustment
1. Set the transmitter CHANNEL switch to 2.
2. Set the transmitter NOISE FILTER switch to OFF.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-
A(L-ch) connector only.
4. Keep distance between transmitter and headphones to 5 meters
over.
5. Set the headphones volume (RV302) to minimum.
6. Set the RV303 (TUNE) to the center position.
7. Connect an oscilloscope CH1 and CH2 to IC301 pin 6 and
pin 4.
8. Check the waveform of the oscilloscope to CH1 is demodulated
1kHz signal and CH2 is GND.
9. If CH1 and CH2 are not satisfied in step 8, adjust the coil (L301)
on the RX board to satisfied step 8.
10. Set the transmitter CHANNEL switch to 1.
11. Adjust the RV303 (TUNE) to receive a signal.
Confirm the signal with stereo.
12. Check same step 8.
13. Set the transmitter CHANNEL switch to 3.
14. Adjust the RV303 (TUNE) to receive a signal.
Confirm the signal with stereo.
15. Check same step 8.
3-3. Carrier Modulation Check
1. Set the transmitter CHANNEL switch to 2.
2. Set the transmitter NOISE FILTER switch to OFF.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(L-ch) connector only.
4. Set the headphones volume (RV302) to minimum.
5. Connect an oscilloscope CH1 and CH2 to IC301 pin 6 and
pin 4.
6. Adjust the tuning control (RV303) to receive radio frequency.
7. Check the waveform of the oscilloscope that the CH1 is
demodulated 1kHz signal and CH2 is GND.
8. Connect an AC voltmeter with LPF to IC301 pin 6 and GND.
9. Check the value of the AC voltmeter to 26mVrms ±2mV
Setting :
3-4. Separation Check
1. Set the transmitter CHANNEL switch to 2.
2. Set the transmitter NOISE FILTER switch to OFF.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(L-ch) connector only.
4. Connect an oscilloscope CH1 to speakers terminal (L+,L-) and
CH2 to IC301 pin 4 and GND.
5. Adjust the tuning control (RV303) to receive radio frequency.
6. Check the waveform of the oscilloscope that the CH1 is
demodulated 1kHz signal and CH2 is GND.
7. Connect an AC voltmeter with LPF to speakers terminal (L+,L).
8. Adjust the value of the AC voltmeter to specification by
headphones volume RV302.
Specified values: 155mVrms
9. Connect an AC voltmeter with LPF to speakersterminal
(R+,R-).
10. Measure the value of the AC voltmeter.
11. Check the difference of the L and R to more than 20dB.
12. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(R-ch) connector only.
Frequency counter
+
–
IC301 pin
4
Setting :
+
–
+
–
IC301 pin6 IC301 pin4
OSCILLOSCPE
CH1 CH2
+
–
Digital voltmeter
(AC range)
LPF
IC301
pin6
33000P
2.2K
+
–
+
–
IC301 pin6 IC301 pin4
OSCILLOSCPE
CH1 CH2
13. Connect an AC voltmeter with LPF to speakers terminal
(R+,R-).
14. Adjust the value of the AC voltmeter to specification by
headphones volume RV302.
Specified values: 155mVrms
15. Connect an AC voltmeter with LPF to speakers terminal
(L+,L-).
16. Measure the value of the AC voltmeter.
17. Check the difference of the L and R to more than 20dB.
Setting :
+
–
Digital voltmeter
(AC range)
L+ / R+
L–/ R–
+
–
+
–
L+ IC301 pin
4
OSCILLOSCPE
L–
CH1 CH2
MRD-RF915R
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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6
MDR-RF915R/RF945R
Notes:
1. Use transmitter with check and adjustment alreadycompleted.
2. On adjusting the headphones section, use the transmitter as a
jig.
Headphones:MDR-RF945R
Transmitter:TMR-RF945R
Procedure:
1. Connect an oscillator with attenuator and terminator (600 Ω)
to the transmitter AUDIO IN-A connector (J402).
2. Connect an AC adapter to the transmitter DC IN 9V jack (J404).
3. Short between Q303 corrector and GND on the RX board.
4. Connect a DC 2.4V to the +B power line externally.
5. Connect lead wires to IC301 pin 4, pin 6, pin 7 and GND on
the RX-BASE board.
6. Connect a resistor 33k Ωbetween IC301 pin 4 and pin 7.
7. Connect lead wires to the speakers’terminals (L+,L-,R+,R-)
on the RX-BASE board.
3-5. Free Run Frequency Check and Adjustment
1. Set the transmitter AUDIO IN-A connector (J402) to no signal.
Note: In this case, operation time is about 5 or 10 minutes.
Perform confirmation for less than 5 minutes.
2. Check the transmitter power indicator (red) lights.
3. Set the transmitter CHANNEL switch to 1.
4. Connect DC 1.2V across TP and GND.
5. Connect a frequency counter to IC301 pin 4 and GND on the
RX-BASE board, then confirm the frequency within 76kHz
±50Hz
6. When the frequency dose not satisfy the specified value, adjust
the value of the frequency counter to specification by RV301
on the RX-BASE board.
Specified values: 76kHz ±50Hz.
7. Remove a 33 Ω resister between IC301 pin 4 and pin 7.
Setting :
3-6. Receive Frequency Check and Adjustment
1. Set the transmitter CHANNEL switch to 2.
2. Set the transmitter NOISE FILTER switch to OFF.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-
A(L-ch) connector only.
4. Keep distance between transmitter and headphones to 5 meters
over.
5. Set the headphones volume (RV302) to minimum.
6. Set the RV303 (TUNE) to the center position.
7. Connect an oscilloscope CH1 and CH2 to IC301 pin 6 and
pin 4.
8. Check the waveform of the oscilloscope to CH1 is demodulated
1kHz signal and CH2 is GND.
9. If CH1 and CH2 are not satisfied in step 8, adjust the coil (L301)
on the RX board to satisfied step 8.
10. Open between Q303 corrector and GND on the RX board.
11. When the transmitter off, check the waveform of the oscilloscope
as follows:
12. Set the transmitter CHANNEL switch to 1.
13. Push the headphones tuning switch (S301) to receive radio
frequency.
14. Check same step 8.
15. Set the transmitter CHANNEL switch to 3.
16. Push the headphones tuning switch (S301) to receive radio
frequency.
17. Check same step 8.
3-7. Carrier Modulation Check
1. Set the transmitter CHANNEL switch to 2.
2. Set the transmitter NOISE FILTER switch to OFF.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(L-ch) connector only.
4. Set the headphones volume (RV302) to minimum.
5. Connect an oscilloscope CH1 and CH2 to IC301 pin 6 and
pin 4.
6. Push the headphone tuning switch (S301) to receive radio
frequency.
7. Check the waveform of the oscilloscope that the CH1 is
demodulated 1kHz signal and CH2 is GND.
8. Connect an AC voltmeter with LPF to IC301 pin 6 and GND.
9. Check the value of the AC voltmeter to 26mVrms ±2mV
Setting :
3-8. Separation Check
1. Set the transmitter CHANNEL switch to 2.
2. Set the transmitter NOISE FILTER switch to OFF.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(L-ch) connector only.
4. Connect an oscilloscope CH1 to speakers terminal (L+,L-) and
CH2 to IC301 pin 4 and GND.
5. Push the headphones tuning switch (S301) to receive radio
frequency.
6. Check the waveform of the oscilloscope that the CH1 is
demodulated 1kHz signal and CH2 is GND.
7. Connect an AC voltmeter with LPF to speakers terminal
(L+,L-).
8. Adjust the value of the AC voltmeter to specification by
headphones volume RV302.
Specified values: 155mVrms
9. Connect an AC voltmeter with LPF to speakersterminal
(R+,R-).
10. Measure the value of the AC voltmeter.
11. Check the difference of the L and R to more than 20dB.
12. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(R-ch) connector only.
Setting :
+
–
Regulated power supply
(DC 1.2V)
TP
+
–
+
–
IC301 pin6 IC301 pin
4
OSCILLOSCPE
CH1 CH2
GND
1.8V
2-3sec 0.6V
+
–
Regulated power supply
(DC 1.2V)
TP
+
–
+
–
IC301 pin6 IC301 pin
4
OSCILLOSCPE
CH1 CH2
+
–
Digital voltmeter
(AC range)
LPF
IC301
pin6
33000P
2.2K
+
–
+
–
IC301 pin6 IC301 pin4
OSCILLOSCPE
CH1 CH2
13. Connect an AC voltmeter with LPF to speakers terminal
(R+,R-).
14. Adjust the value of the AC voltmeter to specification by
headphones volume RV302.
Specified values: 155mVrms
15. Connect an AC voltmeter with LPF to speakers terminal
(L+,L-).
16. Measure the value of the AC voltmeter.
MRD-RF945R
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7
MDR-RF915R/RF945R
Asjustment Location :
RX-BASE BOARD
(Conductor side)
R304
L302
IC301
C315
R302
C302
R310
C313
R312
C317
C332
C319
R308
R326
C301
R305
C331 C329
C335
C340
R340
R341
R342
R343
C341
R349
R344
R345
R346
R347
R348
C343
C350
C351
C342
IC302
C346
C345
R360
C344
R354
Q304
R362
R355
R358
R366
R356
R318
C323
R364
R321
R309
C333
C366
R367
R357 R350
R351
R352
R353
IC305
D303
R320
R330
IC303
Q303
R322
R328
R323
IC304
C334
C320
JC324
C336
R316
C328
C364
R315
C327
D301
C307
R333
R334
R325
Q301
C361
C362
C365
C363
D304
power
R314
R327
R361
Q305
R363
R331
C352
C355
D310
C337
R332
JC303
JC304
JC306
JC309
JC311
C305
C304
C357
C314
C367
JC331
JC332
JC333
JC334
C326
C325
C324
C347
JC335
JC336
C312
C316
L301
RV301
CF301
C330
C310
CF302
C311
C303
C308
C306
C309
S301
15
10 6
JC302
JC305
JC301
IC301 7
IC301 4
IC301 6
GND
Short
L–
L+
R–
R+
GND
TP(R312-C320)
RV303(TUNE)
(RF915R)
+B
power line
(DC 2.4V)
RV301:
Free Run Frequency
Adjustment
(Connect a 33 K Ω resistor)
L301:
Receive frequency
Adjustment
RV302: Volume control
S301(TUNE)
(RF945R)
+
–
Digital voltmeter
(AC range)
L+ / R+
L–/ R–+
–
+
–
L+ IC301 pin
4
OSCILLOSCPE
L–
CH1 CH2
17. Check the difference of the L and R to more than 20 dB.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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MDR-RF915R/RF845R
8
8
4-1. BLOCK DIAGRAMS
SECTION 4
DIAGRAMS
RX-BASE BOARD
L301
RECEIVE
FREQ.
D301
+V +V
FRONT END
FE UNIT 18 1316 FM IF/
DISCRI
DECODE
AMP
DETUNE
MUTE
TUNING
IND
STEREO
IND
CF301
26
CF302
10.7MHz
6 2
10
9
5R-CH
POWER AMP
IC302
MUTE
Q304
22
20
FM FE
L302
+V
COUNTER
IC303
DETECT
IC304
FF
IC305
OSC
Q301
SWITCH
Q303
10
12
27
Q305
DQ
Q
AUTO
BLEND
MUTE MONO/ST
SW
1/2
COUNTER
PD1
PD1
VCO
21
REG
RV301
FREE RUN
FREQ.
IF AMP/DECODE
IC301
ANT301
R-CH
SPEAKER
L-CH
SPEAKER
R-CH
D304
S1
ON/OFF SW
+
–
B+
• Signal path.
• R-ch is omitted due to same as L-ch.
: FM
: AUDIO
power
CHARGE
TERMINAL
(TO TMR-RF915R/RF945R)
RECHAGEABLE BATTERY
(NICKEL-CADMIUM)
NC-AA
2PCS, 2.4V
S301
TUNE
RF945R
RF945R
RF915R
RV303
TUNE
RV302
VOL
w
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4 2
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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MDR-RF915R/RF845R
9
9
4-2. SCHEMATIC DIAGRAM
R332
C306
C310
C311
C312
C316
C324
C325
C326
C330
CF301
CF302
IC301
JC301
JC303
JC304
JC306
JC309
JC311
L301
L302
0.33µH
R302
R304 R305
R309
R310
R312
R314
R315
R316
R318
R321
R322
R325
R327
R328
R330
R331
R333
R334
R340
R341 R342 R343
R344
R345
R346
R347
R350 R351 R352 R353
R354
R355
R356
R357
R358
R361
R362
R363
R364
R366
R367
RV301
RV302(2/2)
D304
C308
JC305
C347
R360
C303
RV302(1/2)
IC302
D310
Q304
Q305
IC305
IC304
Q301
IC303
Q303
D303
JC333
JC334
JC335
JC331
JC332
JC336
S1
C328
C327
C323
C341
R349
S301
C367 C364
C344
C337
C329
C307
C305
C304
C351
C350
C301
C302
C366
C313
C314
C320 C317 C352 C355
C319
C332
C336
C346
C340
C342
C343
C345
C363
C365
C362
C361
JC302
C331
C309
R326
R323 JC324 R320
C333
C315
R308
C334
RV303
R348
C335
C345
C357
D301
1.0k
22
16V
1
50V
10
16V
3.3
50V
10
16V
220
6.3V
220
6.3V
220
6.3V
33
16V
10.7MHz
10.7MHz
DISC
CXA1538N-T4
0
0
0
0
0
0
AIR COIL
2.2k
3.3k 3.3k
100k
3.3k
15k
100k
10
10
47k
1.5k
6.8k
330
33k
33k
10
2.2k
2.2k
2.2k
4.7k
470k 240k 120k
62k
30k
15k
7.5k
15k 1M 1M 15k
22k
47k
22k
22k
22k
22k
10k
22k
22k
150
47k
4.7k
SLR-342VCTB7
N1-CD
22
16V
0
47 16V
22k
4.7/16V
LA4533MTP-1
RB411D
2SC2712L
DTC114TK
TC7W74FU
BA10393F
FMW1-T-148
TC74HC4024
2SC2712L
UDZ 2.2B
0
0
0
0
0
0
0.1
0.1
0.1
0.1
10k
0.001 0.001
0.1
100p
0.01
0.01
0.022
0.022
1
1
1
0.47
0.001
0.01
68p
0.1 0.001 0.001 0.001
0.01
56p
56p
0.22
0.1
0.01
0.01
0.1
0.01
0.001
100p
100p
0
150
4.7k 10
10p
2.2k
1
10k
47k
0.01
0.01
0.01
HVU363ATRU
*
*
*
(VOLUME)
TO
RECHARGEABLE
BATTERY
2pcs,2.4V
(power)
FE UNIT
(FRONT END)
FM
(ANTENNA)
ERROR AMP FF
OSC
OSC SWITCH
BUFFER
AUDIO MUTE
AUDIO AMP
IF AMP/DET
FREE
RUN
FREQ.
SPEAKER
SPEAKER
(R-ch)
(L-ch)
+
-
+
-
TUNE
TUNE
TMR-RF915R/RF945R
NC-AA
COUNTER
0.9
1.6
1.3
1.6
1.0
0
0
0
0
0
0
0.9
0.8
0.9
0.7
0.7
2.3
2.1
1.2
1.2
1.3
1.3
2.0
2.0
2.0
0
2.0
0
0
2.0
2.0
00
0.5 0.4
0
0.6
2.4
0
1.2
1.0
0.9
0
0.9
2.3
2.3
2.4
2.3
0.6
2.3
0
0
0.1
2.3
2.4
1.1
0
1.1
1.1
1.1
2.4
2.3
2.3
0
CHARGE
(BATTERY
TERMINAL)
(NICKEL-CADMIUM)
(POWER ON/OFF)
RF945R
RF945R
RF945R
RF915R
RF945R
2.2 50V
1 50V
0.01
1
C331
C309
*
RF945R
RF915R
*
C333
5p
3p
RF915R
RF945R
RF945R
+
-
RF915R
Note on schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise specified.
•A: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 2.4V and fed with regulated dc power supply
from battery terminal.
• Voltages are dc with respect to ground under no-signal conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
• Signal path.
F: FM
L: AUDIO
IC302 LA4533MTP-1 IC305 TC7W74FU
POWER
SWITCH
MUTE
CIRCIUT
BIAS
1
2
3
4
56
7
8
9
10 MT/SW
OUT1
POWER GND
OUT2
VCC
P/SW
IN1
PRE GND
IN2
REF
AMP2
AMP1
6
CLR
7
PR
8
VCC
5
Q
RSQ
3
Q
2
D
4
GND
1
CK
QDC
• IC BLOCK DIAGRAMS
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

MDR-RF915R/RF845R
10
10
Ref. No. Location
D301 C-2
D303 D-5
D304 D-3
D310 E-3
IC301 B-3
IC302 E-4
IC303 C-2
IC304 D-4
IC305 D-4
Q301 C-4
Q303 C-4
Q304 D-3
Q305 C-3
• Semiconductor
Location
Note:
•X: parts extracted from the component side.
•a: Through hole.
•: Pattern from the side which enables seeing.
(The other layer's patterns are not indicated.)
4-3. PRINTED WIRING BOARD
11
(11)
1-677-934-
RX-BASE BOARD (SIDE A)
23 4 5 6 7 89 10
A
1
B
C
D
E
F
ANT301
(ANTENNA)
S1
(POWER ON/OFF)
FE UNIT
(FRONT-END)
R304
L302
IC301
C315
R302
C302
R310
C313
R312
C317
C332
C319
R308
R326
C301
R305
C331 C329
C335
C340
R340
R341
R342
R343
C341
R349
R344
R345
R346
R347
R348 C343
C350
C351
C342
IC302
C346
C345
R360
C344
R354
Q304
R362
R355
R358
R366
R356
R318
C323
R364
R321
R309
C333
C366
R367
R357 R350
R351
R352
R353
IC305
D303
R320
R330
IC303
Q303
R322
R328
R323
IC304
C334
C320
JC324
C336
R316
C328
C364
R315
C327
D301
C307
R333
R334
R325
Q301
C361
C362
C365
C363
D304
power
R314
R327
R361
Q305
R363
R331
C352
C355
D310
C337
R332
JC303
JC304
JC306
JC309
JC311
C305
C304
C357
C314
C367
JC331
JC332
JC333
JC334
C326
C325
C324
C347
JC335
JC336
C312
C316
L301
RV301
CF301
C330
C310
CF302
C311
C303
C308
C306
C309
S301
11
(11)
1-677-934-
RX-BASE BOARD (SIDE B)
S301
TUNE
RV303
TUNE
RV302
VOL
w
RECHAGEABLE BATTERY
(NICKEL-CADMIUM)
NC-AA
2PCS, 2.4V
+
–
TO TMR-RF915R/RF945R
(BATTERY CHARGE TERMINAL)
15
10 6
SPEAKER
(R-CH)
–
+
SPEAKER
(L-CH)
–
+
JC302
RF945R
RF945R
JC305
JC301
RF915R
RF945R
RF945R
RF945R
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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11
MDR-RF915R/RF945R
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
SECTION 5
EXPLODEDVIEWS
NOTE:
• -XX, -X mean standardized parts, so they may
have some differences from the original one.
• 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 number
in the exploded views are not supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
1
2
3
45
810
9
11
12
21
22
23 13
3
4
5
9
1415
6
#2
#1
#1
#1
#1
#1
#2
#2
#2
26
27
16
19
17
8
26
23
20
26
26 26
a
S1
a
b
b
24
24
24
25
1 3-046-672-01 SUSPENDER
2 3-046-671-01 BAND, HEAD (RF945R)
2 3-046-671-11 BAND, HEAD (RF915R)
3 3-046-692-01 PAT, EAR
4 1-542-400-11 DRIVER (030F032)
5 3-046-685-01 PLATE (L), FRONT
6 3-046-675-41 HANGER (R) (RF915R:US)
6 3-046-675-51 HANGER (R) (RF915R:CND)
6 3-046-675-61 HANGER (R) (RF945R:US)
6 3-046-675-71 HANGER (R) (RF945R:CND)
8 4-992-281-01 HOLDER, BALL SHAFT
9 4-981-975-01 SPRING, TENSION
*10 A-3062-556-A RX-BASE BORAD,COMPLETE (RF915R)
*10 A-3062-564-A RX-BASE BORAD,COMPLETE (RF945R)
11 3-046-677-01 COVER (R), HANGER (RF945R)
11 3-046-677-11 COVER (R), HANGER (RF915R)
12 3-049-799-01 LIGHT, MDR GUIDE
13 3-046-679-41 CAP (R), ORNAMENTAL (RF915R)
13 3-046-679-51 CAP (R), ORNAMENTAL (RF945R)
14 3-046-674-01 HANGER (L) (RF945R)
14 3-046-674-11 HANGER (L) (RF915R)
15 3-048-267-01 TERMINAL (MIDWAY), BATTERY
16 3-048-265-01 TERMINAL (+), BATTERY
17 3-048-266-01 TERMINAL (-), BATTERY
19 3-046-676-01 COVER (L), HANGER (RF945R)
19 3-046-676-11 COVER (L), HANGER (RF915R)
20 3-046-678-41 CAP (L), ORNAMENTAL (RF915R)
20 3-046-678-51 CAP (L), ORNAMENTAL (RF945R)
21 3-046-682-01 TERMINAL, CHARGE
22 3-046-680-01 BUTTON, TUNING (RF945R)
23 3-048-264-01 SHEET, ORNAMENTAL CAP ADHESIVE
24 3-223-909-01 SCREW (B2)
25 1-756-112-31 BATTERY, NICKEL CADMIUM
26 3-224-743-01 SHEET, HOLE (RF945R)
27 3-846-312-01 SPACER
S1 1-771-249-11 SWITCH, PUSH (1 KEY) (POWER ON/OFF)
#1 7-685-104-19 SCREW +P 2X6 TYPE2 NON-SLIT
#2 7-685-105-19 SCREW +P 2X8 TYPE2 NON-SLIT
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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12
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
MDR-RF915R/RF945R SECTION 6
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
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, -X mean standardized parts, so they
may have some difference from the original
one.
• 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...
When indicating parts by reference number,
please include the board name.
RX-BASE
• CAPACITORS:
uF: µF
• RESISTORS
All resistors are in ohms.
METAL: metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F: nonflammable
• COILS
uH: µH
*A-3062-556-A RX-BASE BOARD, COMPLETE (RF915R)
*A-3062-564-A RX-BASE BOARD, COMPLETE (RF945R)
*****************************
3-046-682-01 TERMINAL, CHARGE
< CAPACITOR >
C301 1-164-346-11 CERAMIC CHIP 1uF 16V
C302 1-164-005-11 CERAMIC CHIP 0.47uF 25V
C303 1-124-259-11 ELECT 4.7uF 20% 16V
C304 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V
C305 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V
C306 1-124-234-00 ELECT 22uF 20% 16V
C307 1-163-059-91 CERAMIC CHIP 0.01uF 10% 50V
C308 1-124-234-00 ELECT 22uF 20% 16V
C309 1-104-942-11 ELECT 1uF 20% 50V
(RF945R)
C309 1-124-257-00 ELECT 2.2uF 20% 50V
(RF915R)
C310 1-104-942-11 ELECT 1uF 20% 50V
C311 1-124-233-11 ELECT 10uF 20% 16V
C312 1-126-162-11 ELECT 3.3uF 20% 50V
C313 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C314 1-164-441-11 CERAMIC CHIP 68PF 5% 50V
C315 1-163-227-11 CERAMIC CHIP 10PF 0.50PF 50V
C316 1-124-233-11 ELECT 10uF 20% 16V
C317 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C319 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C320 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C323 1-163-038-00 CERAMIC CHIP 0.1uF 25V
(RF945R)
C324 1-124-635-00 ELECT 220uF 20% 6.3V
C325 1-124-635-00 ELECT 220uF 20% 6.3V
C326 1-124-635-00 ELECT 220uF 20% 6.3V
C327 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C328 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C329 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C330 1-124-242-00 ELECT 33uF 20% 25V
C331 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
(RF915R)
C331 1-164-346-11 CERAMIC CHIP 1uF 16V
(RF945R)
C332 1-163-245-11 CERAMIC CHIP 56PF 5% 50V
C333 1-163-220-11 CERAMIC CHIP 3PF 0.25PF 50V
(RF945R)
C333 1-163-222-11 CERAMIC CHIP 5PF 0.25PF 50V
(RF915R)
C334 1-164-346-11 CERAMIC CHIP 1uF 16V
(RF915R)
C335 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C336 1-163-245-11 CERAMIC CHIP 56PF 5% 50V
C337 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
(RF945R)
C340 1-163-038-00 CERAMIC CHIP 0.1uF 25V
(RF945R)
C341 1-163-038-00 CERAMIC CHIP 0.1uF 25V
(RF945R)
C342 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
(RF945R)
C343 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
(RF945R)
C344 1-163-038-00 CERAMIC CHIP 0.1uF 25V
(RF945R)
C345 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
(RF915R)
C345 1-163-038-00 CERAMIC CHIP 0.1uF 25V
(RF945R)
C346 1-164-489-11 CERAMIC CHIP 0.22uF 10% 16V
(RF945R)
C347 1-124-589-11 ELECT 47uF 20% 16V
(RF945R)
C350 1-164-346-11 CERAMIC CHIP 1uF 16V
C351 1-164-346-11 CERAMIC CHIP 1uF 16V
C352 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C355 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C357 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C361 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C362 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C363 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C364 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C365 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C366 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C367 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
(RF945R)
< CERAMIC FILTER >
CF301 1-577-588-11 FILTER, CERAMIC
CF302 1-577-572-11 FILTER, CERAMIC
< DIODE >
D301 8-719-083-90 DIODE HVU363ATRU
D303 8-719-056-71 DIODE UDZ-TE-17-2.2B (RF945R)
D304 8-719-077-16 LED TLSU124(TPJ52) (power)
D310 8-719-975-40 DIODE RB411D
< IC >
IC301 8-752-072-12 IC CXA1538N
IC302 8-759-802-75 IC LA4533MTP
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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13
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
MDR-RF915R/RF945R
RX-BASE
IC303 8-759-453-43 IC TC74HC4024AF (RF945R)
IC304 8-759-510-73 IC BA10393F-E2 (RF945R)
IC305 8-759-083-94 IC TC7W74FU (RF945R)
< JUMPER RESISTOR >
JC301 1-216-295-91 SHORT 0
JC302 1-216-295-91 SHORT 0 (RF945R)
JC303 1-216-295-91 SHORT 0
JC304 1-216-295-91 SHORT 0 (RF945R)
JC305 1-216-295-91 SHORT 0
JC306 1-216-295-91 SHORT 0 (RF945R)
JC309 1-216-295-91 SHORT 0
JC311 1-216-295-91 SHORT 0
JC324 1-216-295-91 SHORT 0 (RF915R)
JC331 1-216-295-91 SHORT 0
JC332 1-216-295-91 SHORT 0
JC333 1-216-295-91 SHORT 0
JC334 1-216-295-91 SHORT 0
JC335 1-216-295-91 SHORT 0
JC336 1-216-295-91 SHORT 0
< COIL >
L301 1-422-317-31 COIL, AIR-CORE
L302 1-412-933-11 INDUCTOR 0.33uH
< TRANSISTOR >
Q301 8-729-903-10 TRANSISTOR FMW1-T-148 (RF945R)
Q303 8-729-200-72 TRANSISTOR 2SC2712L-TE85L (RF945R)
Q304 8-729-200-72 TRANSISTOR 2SC2712L-TE85L (RF945R)
Q305 8-729-027-44 TRANSISTOR DTC114TKA-T146 (RF945R)
< RESISTOR >
R302 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R304 1-216-061-00 RES-CHIP 3.3K 5% 1/10W
R305 1-216-061-00 RES-CHIP 3.3K 5% 1/10W
R308 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R309 1-216-097-11 RES-CHIP 100K 5% 1/10W
R310 1-216-061-00 RES-CHIP 3.3K 5% 1/10W
R312 1-216-077-00 RES-CHIP 15K 5% 1/10W
R314 1-216-097-11 RES-CHIP 100K 5% 1/10W
R315 1-216-001-00 METAL CHIP 10 5% 1/10W
R316 1-216-001-00 METAL CHIP 10 5% 1/10W
R318 1-216-089-91 RES-CHIP 47K 5% 1/10W
(RF945R)
R320 1-216-001-00 METAL CHIP 10 5% 1/10W
R321 1-216-053-00 METAL CHIP 1.5K 5% 1/10W
R322 1-216-069-00 METAL CHIP 6.8K 5% 1/10W
R323 1-216-065-91 RES-CHIP 4.7K 5% 1/10W
(RF915R)
R325 1-216-037-00 METAL CHIP 330 5% 1/10W
R326 1-216-029-00 METAL CHIP 150 5% 1/10W
R327 1-216-085-00 RES-CHIP 33K 5% 1/10W
R328 1-216-085-00 RES-CHIP 33K 5% 1/10W
R330 1-216-001-00 METAL CHIP 10 5% 1/10W
R331 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
(RF945R)
R332 1-216-049-11 RES-CHIP 1K 5% 1/10W
(RF945R)
R333 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R334 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R340 1-216-071-00 METAL CHIP 8.2K 5% 1/10W
(RF945R)
R341 1-216-113-00 METAL CHIP 470K 5% 1/10W
(RF945R)
R342 1-216-106-00 METAL CHIP 240K 5% 1/10W
(RF945R)
R343 1-216-099-00 METAL CHIP 120K 5% 1/10W
(RF945R)
R344 1-216-092-00 RES-CHIP 62K 5% 1/10W
(RF945R)
R345 1-216-084-00 METAL CHIP 30K 5% 1/10W
(RF945R)
R346 1-216-077-00 RES-CHIP 15K 5% 1/10W
(RF945R)
R347 1-216-070-00 METAL CHIP 7.5K 5% 1/10W
(RF945R)
R348 1-216-089-91 RES-CHIP 47K 5% 1/10W
(RF945R)
R349 1-216-073-00 RES-CHIP 10K 5% 1/10W
(RF945R)
R350 1-216-077-00 RES-CHIP 15K 5% 1/10W
(RF945R)
R351 1-216-121-11 RES-CHIP 1M 5% 1/10W
(RF945R)
R352 1-216-121-11 RES-CHIP 1M 5% 1/10W
(RF945R)
R353 1-216-077-00 RES-CHIP 15K 5% 1/10W
(RF945R)
R354 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R355 1-216-089-91 RES-CHIP 47K 5% 1/10W
(RF945R)
R356 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R357 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R358 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R360 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R361 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R362 1-216-073-00 RES-CHIP 10K 5% 1/10W
(RF945R)
R363 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R364 1-216-081-00 METAL CHIP 22K 5% 1/10W
(RF945R)
R366 1-216-029-00 METAL CHIP 150 5% 1/10W
(RF945R)
R367 1-216-089-91 RES-CHIP 47K 5% 1/10W
(RF945R)
< VARIABLE RESISTOR >
RV301 1-241-763-11 RES, ADJ, CARBON 4.7K (FREE RUN FREQ.)
RV302 1-227-189-11 RES, VAR CARBON 20K/20K (VOL )
RV303 1-227-190-11 RES, VAR CARBON 10K (TUNE) (RF915R)
< SWITCH >
S301 1-771-980-11 SWITCH, TACTILE (TUNE) (RF945R)
******************************************************
MISCELLANEOUS
*************
4 1-542-400-11 DRIVER (030F032)
25 1-756-112-31 BATTERY, NICKEL CADMIUM
S1 1-771-249-11 SWITCH, PUSH (1 KEY) (POWER ON/OFF)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

MDR-RF915R/RF945R
REVISION HISTORY
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Ver. Date Description of Revision
1.0 2001.05 New
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com