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SONY SRSRF90R
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY SRSRF90R Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 10 (click to view)
SRS-RF90R/RF90RK/TMR-RF90
SRS-RF90R
Notes: 1. Use transmitter with check and adjustment already completed. 2. On adjusting the speaker section, use the transmitter as a jig. Wireless Active Speaker : SRS-RF90R Transmitter : TMR-RF90 Procedure: 1. Connect an oscillator with attenuator and terminator (600 �) to the transmitter AUDIO IN-A connector (J402). 2. 3. 4. 5. Connect an AC adapter to the transmitter DC IN 9V jack (J404). Short between Q101 corrector and GND on the RX board. Connect an AC adapter to the speaker DC IN 9V jack (J801). Connect lead wires to IC101 pin 4, pin 6, pin 7 and GND on 13. Switch on the transmitter again. 14. Set the transmitter CHANNEL switch to 1. 15. Push the TUNE switch (S301) to receive radio frequency. 16. Check same step 8. 17. Set the transmitter CHANNEL switch to 3. 18. Push the TUNE switch (S301) to receive radio frequency. 19. Check same step 8. Setting :
regulated power supply (DC 1.2V) (from step 6 to step 9) oscilloscope (step 8, step 16, step 19)
CH2 ++ ��

+ �

TP102

IC101 pin6

CH1

IC101 pin4

the RX board. 6. Connect a resistor 33k � between IC101 pin 4 and pin 7. 7. Connect lead wires to the speakers� terminals (L+,L-,R+,R-) on the AMP board. 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 D401 (red) lights. 3. Set the transmitter CHANNEL switch to 1. 4. Connect DC 1.2V across TP102 and GND on the RX board. 5. Connect a frequency counter to IC101 pin 4 and GND on the RX 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 RV101 on the RX board. Specified values: 76kHz ± 50Hz. 7. Remove a 33 k� resister between IC101 pin 4 and pin 7. Setting :
regulated power supply (DC 1.2V) frequency counter

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 speaker volume (RV301) to minimum. 5. Connect an oscilloscope CH1 and CH2 to IC101 pin 6 and pin 4. 6. Push the TUNE 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 IC101 pin 6 and GND. 9. Check the value of the AC voltmeter to 26mVrms ± 2mV Setting :
digital voltmeter (AC range) LPF
+ �
2.2K 33000P

oscilloscope

IC101 pin6

IC101 pin6

CH1

++ ��

CH2

IC101 pin4

+ �

TP102

+ �

IC101 pin4

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 IC101 pin 4 and GND. 5. Push the TUNE 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 speaker volume RV301. Specified values: 155mVrms 9. Connect an AC voltmeter with LPF to speakers terminal (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. 13. Connect an AC voltmeter with LPF to speakers terminal (R+,R-). 14. Adjust the value of the AC voltmeter to specification by speaker volume RV301. Specified values: 155mVrms 15. Connect an AC voltmeter with LPF to speakers terminal (L+,L-). 16. Measure the value of the AC voltmeter.

Receiving 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 INA(L-ch) connector only. 4. Keep distance between transmitter and speaker to 5 meters over. 5. Set the speaker volume (RV301) to minimum. 6. Connect DC1.2V across TP102 and GND. 7. Connect an oscilloscope CH1 and CH2 to IC101 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 (L101) on the RX board to satisfied step 8. 10. Disconnect DC1.2V across TP102 and GND. 11. Open between Q101 corrector and GND on the RX board. 12. Switch the transmitter off and push the TUNE switch (S301). Check the waveform of the oscilloscope at the TP102 as follows: Setting :

oscilloscope
Waveform of auto-tuning 1.8V voltage at the TP102 2-3sec GND 0.6V
CH1

TP102

+ �

10

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