Sony MDR-RF830 free download

File name MDR-RF830.PDF

MDR-RF830 SERVICE MANUAL REVISED Ver 1.2 1999. 09 AEP Model UK Model MDR-RF830 is the component model block one in the MDR-RF830RK. COMPONENT MODEL NAME FOR MDR-RF830RK Wireless Stereo Headphones Transmitter MDR-RF830 TMR-RF830R SPECIFICATIONS Power source DC 3 V: 2 Ч R6 (size AA) battery or 2 Ч supplied NC-AA-HJ Ni-Cd rechargeable battery Approx. 215 g (7.6 oz.) incl. Ni-Cd batteries Mass Design and specifications are subject to change without notice. WIRELESS STEREO HEADPHONES MICROFILM SECTION 1 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 1-1. RX BOARD, FE BOARD (R-CH) 3 Cover (R), hanger 7 FE board 8 Remove solder 1 Screws (+P2 Ч 12) 9 Screw (M1.7 Ч 4) 6 Remove solder 4 RX board 2 Screws (+P2 Ч 8) 5 Plate, RX shield !Ў SW1 0 Spacer 1-2. MDD02 (R-CH) 6 MDD02 (R-CH) 5 Screw (M1.7 Ч 4) 1 Pad, ear 2 Screw (+P2 Ч 8) 3 Holder, ball shaft 4 Housing (R) assy 7 Remove solder --2-- 1-3. CASE, BATTERY, MDD01 (L-CH) 2 Cover, battery 6 Case, battery 5 Screws (+P2 Ч 12) 3 Screws (+P2 Ч 8) 0 Housing (L) assy 4 Cover (L), hanger 7 Remove solder !Ў Screw (M1.7 Ч 4) 1 Pad, ear 8 Screw (+P2 Ч 8) 9 Holder, ball shaft !TM MDD01 (L-CH) !Ј Remove solder --3-- SECTION 2 ELECTRICAL ADJUSTMENTS Notes: 1. Use transmitter with check and adjustment alreadycompleted. 2. The transmitter section adjustments should be completed before performing the headphones section adjustment. 3. On adjusting the headphones section, use the transmitter as a jig. Headphones MDR-RF830 Transmitter TMR-RF830R Separation check and adjustment 1. Set the transmitter channel to CH2. 2. Set the transmitter noise filter SW to OFF . 3. Input a signal of 1kHz 316mVrms to onl y the transmitter LCH (J403). 4. Connect an digital voltmeter (AC range) and oscilloscope to the L-CH speaker outputs (both sides of MDD01). 5. Receive signals by turning the TUNING VOL (RV302). 6. Adjust the VOL (RV301) so that the RX board L-CH speaker outputs (both sides of MDD01) are 155mVrms. 7. Connect an digital voltmeter (AC range) and oscilloscope to the R-CH speaker outputs (both sides of MDD02) and measure the voltages. 8. At this time, check to make sure the level separation of L-CH and R-CH speaker outputs is more than 20dB. If the separation is less than 20dB, turn R V303 on the RX boar d so that the RCH output is minimal, then check to see if the level separation of L-CH and R-CH speaker outputs is more than 20dB. 9. Input a signal of 1kHz 316mVrms to only the transmitter R-CH (J402). 10. Adjust the VOL (RV301) so that the RX boar d R-CH speaker outputs (both sides of MDD02) are 155mVrms. 11. Connect an digital voltmeter (AC range) and oscilloscope to the L-CH speaker outputs (both sides of MDD01) and measure the voltages. 12. At this time, check to make sure the level separation of L-CH and R-CH speaker outputs is more than 20dB. Procedure: AF OSC L-CH (J403) 1kHz 316mVrms (­7.8dB) Jig Transmitter 600 J404 power supply (DC 9V) ATT 1. Feed a sign