Sony-STRWX7-rec-sm 电路图 维修手册.pdf

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1、STR-WX7 E Model Australian Model SERVICE MANUAL FM STEREO/FM-AM RECEIVER MICROFILM SPECIFICATIONS STR-WX7 is the tuner and amplifier section in MHC-WX7AV. Amplifier section The following measured at AC 120, 220, 240 V 50/60 Hz DIN power output (Rated) (FRONT) 120 + 120W (6 at 1kHz DIN) Continuous RM

2、S power output (Reference) FRONT SPEAKER: 150 + 150W (6 at 1kHz, 10% THD) CENTER SPEAKER: 60W (8 at 1kHz, 10% THD) REAR SPEAKER: 40 + 40W (8 at 1kHz, 10% THD) InputsMD/VIDEO 1 IN (phono jacks): voltage 450/250mV, impedance 47k AV INPUT AUDIO (phono jacks): voltage 250mV, impedance 47k MIX MIC (phone

3、 jack): sensitivity 1mV, impedance 10k OutputMD/VIDEO 1 OUT (phono jacks): voltage 450/250mV, impedance 1k PHONES (stereo phone jack): accepts headphones of 8 or more. FRONT SPEAKER: accepts impedance of 6 to 16 CENTER SPEAKER: accepts impedance of 8 to 16 REAR SPEAKER: accepts impedance of 8 to 16

4、SUPER WOOFER: Voltage 1V, impedance 1k Video section InputsAV INPUT VIDEO (phone jack): 1Vp-p, 75 OutputsMONITOR OUT (phone jack): 1Vp-p, 75 5Tuner section FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range87.5 108.0MHz Antenna terminals75 unbalanced Intermediate frequency10.7MHz A

5、M tuner section Tuning range Middle Easten models:531 1,602kHz(with the MW interval set at 9kHz) 5.95 17.90MHz (with the SW interval set at 5kHz) Australian, Thai models : 531 1,602kHz(with the AM tuning interval set at 9kHz) 530 1,710kHz (with the AM tuning interval set at 10kHz) Other models:MW :

6、531 1,602kHz(with the MW tuning interval set at 9kHz) 530 1,710kHz (with the MW tuning interval set at 10kHz) SW : 5.95 17.90 MHz (with the SW tuning interval set at 5kHz) Intermediate frequency450kHz AntennaAM loop antenna External antenna terminal Continued on next page RadioFans.CN 收音机爱 好者资料库 2 T

7、ABLE OF CONTENTS 1. GENERAL.3 2. DISASSEMBLY 2-1.Slideng Panel Assembly 4 2-2.Level Slider 4 3. SERVICE MODE.5 4. DIAGRAMS 4-1.Circuit Boards Location 9 4-2.Block Diagrams Main Section 10 Power Section 11 4-3.Printed Wiring Board Main Section 12 4-4.Schematic Diagram Main (1/2) Section13 4-5.Schemat

8、ic Diagram Main (2/2) Section 14 4-6.Schematic Diagram AV/Mic Section 15 4-7.Printed Wiring Board AV/Mic Section 15 4-8.Schematic Diagram Power Amp Section 16 4-9.Printed Wiring Board Power Amp Section 17 4-10. Schematic Diagram Display Section 18 4-11. Printed Wiring Board Display Section 19 4-12.

9、Schematic Diagram Sliding Panel Section 20 4-13. Printed Wiring Board Sliding Panel Section 21 4-14. Schematic Diagram Surround Section 22 4-15. Printed Wiring Board Surround Section 23 4-16. Printed Wiring Board Trans Section 24 4-17. Schematic Diagram Trans Section 25 4-18. IC Block Diagrams 26 4-

10、19. IC Pin Function 28 5. EXPLODED VIEWS 6-1.Case and Sliding Panel Section .31 6-2.Front Panel Section . 32 6-3.Slide Mechanism Section . 33 6-4.Circuit Boards and Back Panel Section.34 7. ELECTRICAL PARTS LIST.35 LABEL MODEL NUMBER No. MODEL IDENTIFICATION BACK PANEL Saudi Arabia, Singapore, Malay

11、sia, Australian model 4-900-848-2 Thai model4-900-848-3 MODELPART No. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBE

12、RS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. General Power requirements Australian model:240V AC, 50/60Hz Thailand model:220V AC, 50/60Hz Other models:120V or 220V or 230 240, 50/60Hz Adjustable with voltage selector Power consumption340W Dimensions (w/h/d)Approx. 288 205 3

13、75mm MassApprox. 8.8kg Design and specifications are subject to change without notice. RadioFans.CN 收音机爱 好者资料库 3 Front Panel SECTION 1 GENERAL 1234567 8 9 !? !? !? !? !?!?!?!? ? ? ? ? #? #? #? !?!? #? #? ? Rear Panel2 453 1 6 7 1 MOVIE button 2 MUSIC button 3 GAME button 4 PLACE button 5 P FILE butt

14、on 6 EFFECT ON/OFF button 7 OPEN/CLOSE button 8 TUNER BAND button 9 STEREO/MONO button ! TUNING MEMORY button ! KARAOKE PON/MPX button ! MIC LEVEL dial ! MIX MIC jack ! GROOVE button ! VOLUME dial ! ) + button ! ENTER/NEXT button ! MULTI JOG STATION dial ! 0 button NON-STOP button EDIT button FLASH

15、button PLAY MODE button REPEAT button PHONES jack LOOP button CLOCK/TIMER SET button TIMER SELECT button FUNCTION button # PROLOGIC button # DSP button # DBFB button # DISPLAY/DEMO button # I/u (POWER) button 1 SYSTEM CONTROL jack 2 ANTENNA terminal 3 CENTER SPEAKER terminal 4 REAR SPEAKER terminal

16、5 MONITOR OUT jack 6 FRONT SPEAKER terminal 7 MD/VIDEO 1 jack RadioFans.CN 收音机爱 好者资料库 4 SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 2-1. SLIDING PANEL ASSEMBLY 4 Flat type cable (19 core) 2 Screw (BVTP 3x8) 3 Holder level 5 Sliding panel assembly Slide

17、mechanism 1 Push the OPEN/CLOSE button to open the Sliding panel assembly. 1 Screw (BVTP2.6x8) 4 Four screw (BVTP2.6x8) 5 Holder (L) assembly a a b b 6 Four screw (BVTP2.6x8) 7 Holder (R) assembly 8 Remove the Level slider direction of arrow. 2 Screw (BVTP2.6x8) 3 Top bracket 2-2. LEVEL SLIDER NOTE

18、FOR INSTALLATION : Attach in the reverse order, but make sure the rollers (a, b) of the holder (L) assembly and holder (R) assembly fit into the grooves of the level slider. 5 SECTION 3 SERVICE MODE Connections and Operations When Used Alone Normally, use the unit connected to the HTC-WX5 as follows

19、. Basically, when servicing the unit, connect the unit as follows. Even when not connected to the HTC-WX5, the unit can operate alone as it mounts a power supply (some functions will however not be available). MC Cold Reset The cold reset clears all data including preset data stored in the RAM to in

20、itial conditions. Execute this mode when returning the set to the customer. Procedure: 1.Press three buttons EDIT , ENTER/NEXT , and DISPLAY/DEMO simultaneously. 2.The fluorescent indicator tube becomes blink instantaneously, and the set is reset. CD Delivery Mode (This mode can be used only when th

21、e HTC-WX5 is connected.) This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair. Procedure: 1.Press 1/u button to turn the set ON. 2.Press LOOP button and 1/u button simultaneously. 3.A message “LOCK” is displayed on the fl

22、uorescent indicator tube, and the CD delivery mode is set. MC Hot Reset This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out. Procedure: 1.Press three buttons REPEAT , ENTER/NEXT , and DISPLAY/DEMO simul

23、taneously. 2.The fluorescent indicator tube becomes blink instantaneously, and the set is reset. Sled Servo Mode (This mode can be used only when the HTC-WX5 is connected.) This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up. Procedure: 1.Select the fun

24、ction “CD”. 2.Press three buttons FLASH , ENTER/NEXT , and KARAOKE PON/MIX simultaneously. 3.The Sled Servo mode is selected, if “CD” is blinking on the fluorescent indicator tube. 4.With the CD in stop status, press ) + button move the pick-up to outside track, or 0 button to inside track. 5.To exi

25、t from this mode, perform as follows: 1) Move the pick-up to the most inside track. 2) Press three buttons in the same manner as step 2. Note: Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded. Do not run the sled motor excessively, othe

26、rwise the gear can be chipped. Change-over of FUNCTION Name The FUNCTION name of external input terminal can be changed over to VIDEO 1 or MD. With the FUNCTION selected to “MD”, about 5dB mute is applied to the input gain. Procedure: 1.Press 1/u button to turn the set OFF. 2.Press 1/u button togeth

27、er with FUNCTION button, and the power is turned on, the display of fluorescent indicator tube changes to “MD” or “VIDEO 1” instantaneously, and thus the FUNCTION is changed over. Change-over of AM Tuner Step between 9kHz and 10kHz A step of AM channels can be changed over between 9kHz and 10kHz. Pr

28、ocedure: 1.Press 1/u button to turn the set ON. 2.Select the function “TUNER”, and press TUNER BAND button to select the BAND “MW”. 3.Press 1/u button to turn the set OFF. 4.Press ENTER/NEXT and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to “MW step 10” or “MW

29、step 9”, and thus the channel step is changed over. AC IN UNITHTC-WX5 SYSTEM CONTROL 17P 6 LED and Fluorescent Indicator Tube All Lit, Key Check Mode (Do not connect the HTC-WX5.) Procedure: 1.Press 1/u button to turn the set ON. 2.Press the OPEN/CLOSE button to open the sliding panel. 3.Press three

30、 buttons PROLOGIC , ENTER/NEXT , and DISPLAY/DEMO simultaneously. 4.LEDs and fluorescent indicator tube are all turned on. Each time the MOVIE button is pressed, the fluorescent indicator tube lights up as follows: lights up completely n lights up partially 1 n lights up partially 2 n lights up comp

31、letely. 5.Press GAME button, and the key check mode is activated. 6.In the key check mode, the fluorescent indicator tube displays “K J0 V0”. Each time a button is pressed, “K”value decreases. However, once a button is pressed, it is no longer taken into account. ( means the total of buttons) “J” Va

32、lue increases like 1, 2, 3 . if rotating JOG knob in “+” direction, or it decreases like 0, 9, 8 . if rotating in “-” direction. “V” Value increases like 1, 2, 3 . if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 . if rotating in “-” direction. 7.Pressing all buttons lights up

33、the fluorescent indicator tube completely. 8.To exit from this mode, press three buttons EDIT , ENTER/NEXT and DISPLAY/DEMO simultaneously. (COLD RESET) 9.To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord. CD, TAPE Deck Aging Mode (This mode can b

34、e used only when the HTC-WX5 is connected.) This mode can be used for checking the operations of the CD player and tape deck. When problems occur; Aging stops, and the stopped state is displayed on the fluorescent indicator tube. When no problems; Aging continues. Preparations: Set the CD on the DIS

35、C1 tray. Insert a commercially available tape for recording (tapes which contents can be erased, etc.) in decks A and B. Setting the aging mode: Press the PLAY MODE button, ENTER/NEXT button, and STEREO/MONO button together. When the aging mode is set, the CD roulette mark blinks. To exit the mode,

36、press the 1/u button and turn OFF the power. Sequence: The aging mode is executed in the following sequence. If the function is set to “CD” when the aging mode is set, aging is performed starting from the CD player. When set to “TAPE A” or “TAPE B”, aging is started from deck A. If the function is s

37、et to others, aging will not be started until the function is switched to CD or TAPE. Display of status: The aging status is displayed on the fluorescent indicator tube. Normally, the CD player displays the remaining aging time. But if operations ended abnormally, it displays the cause. During the a

38、ging of the tape deck, the operations performed will be displayed. If operations ended abnormally, this will be displayed at the fluorescent display tube. CD Player During normal operations: Display of fluorescent indicator tube *1- *: Displays “CD” and the remaining aging time (minutes) alternately

39、. The remaining aging time is counted down from 12. : Track number being accessed. Aging of CD player (12 minutes) Aging of deck A Aging of deck B Aging of deck A 10 minutes (half) 7 When operations end abnormally: Display of fluorescent display tube Display of Operations TAPE A AG-1 TAPE A AG-2 TAP

40、E A AG-3 TAPE A AG-4 TAPE A AG-5 TAPE B AG-1 TAPE B AG-2 TAPE B AG-3 TAPE B AG-4 TAPE B AG-5 Operations during aging Operations are performed in the following sequence during aging. 1.The CD tray rotates and disc 1 is selected. 2.Chucking is performed. 3.TOC is read. 4.Track 1 played back for 2 seco

41、nds. 5.The last track is played back for 2 seconds. 6.1 to 5 is repeated. 7.After 12 minutes of aging, aging is switched to the tape deck. 1.The tape in deck A and B are rewound to the head at the same time. 2.The FWD side is played back for 100 seconds. 3.The tape is fast forwarded (FF) for 20 seco

42、nds. The following procedure is performed when the tape end is reached before the 20 seconds. 4.The REV side is played back for 100 seconds. 5.The tape is rewound to the head (REW). 6.The FWD side is played back for 100 seconds. 7.The tape is fast forwarded (FF) for 20 seconds. The following procedu

43、re is performed when the tape end is reached before the 20 seconds. 8.The REV side is played back for 100 seconds. 9.The tape is rewound to the head (REW). 10. The tape in deck A is rewound to the head. 11. The FWD side is played back for 100 seconds. 12. The tape is fast forwarded (FF) for 20 secon

44、ds. The following procedure is performed when the end is reached before the 20 seconds. 13. Aging is switched to the CD player. Display NO DISC ERR FOCUS1 ERR FOCUS2 ERR GFS ERR FBIAS ERR SENSOR ERR TABLE ERR TRAY ERR Main Cause DISC 1 is NO DISC from the beginning Focus is not imposed properly The

45、focus deviated several times after the disc rotated normally GFS ERROR Error during focus bias adjustment DISC 1 was found to be NO DISC by the disc sensor The table did not rotate normally The tray containing the BD did not operate normally Tape Deck Operation TAPE A, B REW TAPE A FWD TAPE A FF TAP

46、E A REV TAPE A REW TAPE B REW TAPE B FWD TAPE B FF TAPE B REV TAPE B REW Timing of Ending Shutoff 100 seconds playback 20 seconds or shutoff 100 seconds playback Shutoff Shutoff 100 seconds playback 20 seconds or shutoff 100 seconds playback Shutoff 8 PANEL Aging Mode This mode is used for opening a

47、nd closing the sliding panel continuously. Setting the aging mode : With the set at standby condition, press FLASH button, ENTER/NEXT button and STEREO/MONO button together. The aging will start and sliding panel will follow aging sequence as described below. When problems occur ; Aging stops and “A

48、GING ERROR” is displayed on the fluorescent indicator tube. When no problems; Aging is carried out repeatedly. After 65000 times, “AGING STOP” is displayed and aging stops. Aging Sequence Counts upnnPanel openPanel closenStops for one second in the opened state Stops for one second in the closed state Each time the DISPLAY/DEMO button is pressed, the display switches as follows. AGING (No. of agings carried out) OP MAX . (Maximum time tak