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There are currently no product reviews.
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as always, rapid and efficient, very good and clear prints
details clearly visible keep going this way!!!!!!
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I expect a wonderful result as alaways!!!!!!
Usually is much faster....
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Wow very wonderful and clear!!!! I will always trust them
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Providing the manual works fine, quickly and without any problems for an acceptable price. After printing the service manual it took me only a short time to repair my carradio from Clarion. Thank You! Greetings from Heiko
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I was searching a way to modify the original phono-in entry (for connection of vynil disc player, with RIAA equalization) to a line-in entry (for connection of modern analog entries, eg. ipod, mp3player).
This service manual gave me the correct hints.
It contains very useful infos for repairing and modifing the hi-fi, such as disassembling instructions, block diagrams, schematic diagrams, PCB prints, replacement parts list.
Very good!
MDR-RF940R
Adjustment for Separation Preparation:
AF OSC AC voltmeter ATT + + � � TMR-RF940R Transmitter MDR-RF940R Headphones + �
600 �
input plug (Lch or Rch) 400 Hz 316 mVrms
speaker out (Lch or Rch)
Procedure: 1) Input a signal of 400 Hz 316 mVrms only to Lch of the adjusted transmitter. 2) Turn RV91 on the RX board so that the speaker out of Lch becomes 155 mVrms. 3) Turn RV61 on the RX board so that the speaker out of Rch becomes minimum. 4) At this time, confirm the separation between Lch and Rch should be over 18 dB. 5) Then, input a signal of 400 Hz 316 mVrms only to Rch of the transmitter. 6) At this time, confirm the separation between Rch and Lch should be over 18 dB. Adjustment Location: RX Board Confirmation without a spectrum analyzer Please confirm the units by following procedure shown below. Here a series of procedure which can be performed without a spectrum analyzer is introduced. Tuning frequency confirmation Preparation:
AF OSC DC voltmeter ATT + + � � TMR-RF940R Transmitter 5m MDR-RF940R Headphones RX Board TP2 + �
600 � input plug
Procedure: 1) Input any signal including music into TMR-RF940R and place the unit the point where is far from MDR-RF940R and place the unit in a location where is far from by 5 m. 2) Measure the DC voltage at the test point TP2 of RX board of MDR-RF940R. This DC voltage corresponds to the S-curve voltage of FM detection characteristics as shown below.
Spec. DC1.1 ± 0.1 V 0 f
AF signal or music
If tuned frequency is in the area covered by AFC, the center voltage changes when CT41 (channel 1) CT42 (channel 2) is turned. Adjustment Location:
[RX Board] � Side A �
PRINTED WIRING BOARD
� MDR-RF940R Service Manual page 5. (Location F � H, 4 � 6)
[RX Board] � Side A �
RV91 IC41 CT41 CT42 RV61
+ � DC voltmeter
Sony Corporation
9-923-238-81
Personal A&V Products Company
98E0539-1 Printed in Japan © 1998. 5 Published by Quarity Engineering Dept. (Shibaura)
�4�
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