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 Shinagawa Tec 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. www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 of 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. EXPLODED VIEWS........................................................11 6. ELECTRICAL PARTS LIST........................................12 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 3 MDR-RF915R/RF945R SECTION 2 DISASSEMBLY 2-1. RX-BASE BOARD • This set can be disassembled in the order shown below. 3Remove 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 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 Ω between 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 pin4 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 pin4 OSCILLOSCPE L– CH1 CH2 MRD-RF915R www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 Ω between 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 pin4 OSCILLOSCPE CH1 CH2 GND 1.8V 2-3sec 0.6V + – Regulated power supply (DC 1.2V) TP + – + – 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. MRD-RF945R www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 1 5 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 KΩ resistor) L301: Receive frequency Adjustment RV302: Volume control S301(TUNE) (RF945R) + – Digital voltmeter (AC range) L+ / R+ L– / R– + – + – L+ IC301 pin4 OSCILLOSCPE L– CH1 CH2 17. Check the difference of the L and R to more than 20 dB. www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 13 16 FM IF/ DISCRI DECODE AMP DETUNE MUTE TUNING IND STEREO IND CF301 26 CF302 10.7MHz 6 2 10 9 5 R-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 D Q 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 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 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 0 0 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 Ω and 1/4 W 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 5 6 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 R S Q 3 Q 2 D 4 GND 1 CK Q D C • 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 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 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) 2 3 4 5 6 7 8 9 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) 1 5 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 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 11 MDR-RF915R/RF945R Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks SECTION 5 EXPLODED VIEWS 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 4 5 8 10 9 11 12 21 22 23 13 3 4 5 9 14 15 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 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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) w www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com MDR-RF915R/RF945R REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 1.0 2001.05 New www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com