Aiwa-CX-JS7-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL TUNER FM tuning range87.5 MHz to 108 MHz FM usable sensitivity (IHF)13.2 dBf FM antenna terminal75 ohms (unbalanced) AM tuning range530 kHz to 1710 kHz (10 kHz step) 531 kHz to 1710 kHz (9 kHz step) AM usable sensitivity350 V/m AM antennaLoop antenna AMPLIFIER Power output160 W + 160

2、W (40 Hz - 20 kHz, THD less than 1 %, 6 ohms) 200 W + 200 W (1 kHz, THD less than 10 %, 6 ohms) Total harmonic distortion0.08 % (100 W, 1 kHz, 6 ohms) InputVIDEO (MD): 500 mV OutputsSPEAKERS: 6 ohms or more PHONES: 32 ohms or more CASSETTE DECK Track format4 tracks, 2 channels stereo Frequency respo

3、nse50 Hz 8 kHz Recording systemAC bias HeadsDeck A: playback x 1 Deck B: recording/playback x 1, erase x 1 CD PLAYER LaserSemiconductor laser ( = 780 nm) Emission duration: continuous D/A converter1 bit dual Signal-to-noise ratio85 dB (1 kHz, 0 dB) Harmonic distortion0.05 % (1 kHz, 0 dB) GENERAL Pow

4、er requirements120 V AC, 60 Hz Power consumption160 W Power consumptionWith ECO mode on: 0.25 W in standby modeWith ECO mode off: 25 W Dimensions (W x H x D)280 x 328 x 437 mm (111/8 x 12 15/16 x 17 7/32 in.) Weight10.2 kg (22 lbs 8 oz) Specifications and external appearance are subject to change wi

5、thout notice. COPYRIGHT Check copyright laws relevant to recordings from discs, tuner or tape for the country where the unit is to be used. Licensed by BBE Sound, Inc. under USP4638258, 5510752 and 5736897. COMPACT DISC DECK RECEIVER US Model CX-JS7 Ver. 1.2 2005.05 9-877-265-03Sony Corporation 2005

6、E05-1Personal Audio Group 2005.05Published by Sony Engineering Corporation SPECIFICATIONS CX-JS7 is the tuner, amplifier, cassette deck and CD player section in JAX-S7. Model Name Using Similar MechanismNEW CD CD Mechanism TypeCDM74F-K6BD71A Section Base Unit NameBU-K6BD71A Optical Block NameKSM-213

7、DCP Optical Pick-up NameKSS-213D Tape deck Model Name Using Similar MechanismNEW Section Tape Transport Mechanism TypeCWM43FF13 RadioFans.CN 收音机爱 好者资料库 CX-JS7 2 Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be da

8、m- aged by heat. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur- ing 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 or unsoldering. CAU

9、TION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL T

10、O SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer: Check the

11、 antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassi

12、s, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods. 1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2.A battery-operated AC milliammeter. The Data Precision

13、245 digital multimeter is suitable for this job. 3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a pas- si

14、ve VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) Fig. A.Using an AC voltmeter to check AC leakage. 1.5 k0.15 F AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground RadioFans.CN 收音机爱 好者资料库 CX-JS7 3 TABLE OF CONTEN

15、TS 1.SERVICING NOTES.4 2.GENERAL Location of Controls .7 3.DISASSEMBLY 3-1.Disassembly Flow .9 3-2.Case (SIDE-L/R). 10 3-3.Case (Top) . 10 3-4.Tray Panel. 11 3-5.CD Mechanism Deck (CDM74F-K6BD71A). 11 3-6.Front Panel Section . 12 3-7.Mechanical Deck. 12 3-8.Rear Cabinet Section . 13 3-9.Main Board.

16、13 3-10. Power Board . 14 3-11. Transformer Board . 14 3-12 Table Assy . 15 3-13. Motor (TB) Board . 15 3-14. Motor (LD) Board. 16 3-15. Base Unit (BU-K6BD71A). 16 3-16. Motor Gear Assy (Sled) (M701), BD Board . 17 3-17. Optical Pick-up (KSS-213D) . 17 4.TEST MODE. 18 5.ELECTRICAL ADJUSTMENTS CD Sec

17、tion . 21 6.DIAGRAMS 6-1.Block Diagram CD Section . 22 6-2.Block Diagram TUNER/TAPE/PANEL Section . 23 6-3.Block Diagram AMP/POWER SUPPLY Section . 24 6-4.Note for Printed Wiring Boards and Schematic Diagrams . 25 6-5.Printed Wiring Board BD Board . 26 6-6.Schematic Diagram BD Board . 27 6-7.Printed

18、 Wiring Boards CHANGER Section . 28 6-8.Schematic Diagram CHANGER Section . 29 6-9.Schematic Diagram MAIN Board (1/4) . 30 6-10. Schematic Diagram MAIN Board (2/4) . 31 6-11. Schematic Diagram MAIN Board (3/4) . 32 6-12. Schematic Diagram MAIN Board (4/4) . 33 6-13. Printed Wiring Board MAIN Board .

19、 34 6-14. Printed Wiring Board Power Board . 35 6-15. Schematic Diagram Power Board (1/2) . 36 6-16. Schematic Diagram Power Board (2/2) . 37 6-17. Printed Wiring Boards CD BUTTON/HEADPHONE Boards . 38 6-18. Schematic Diagram CD BUTTON/HEADPHONE Boards . 39 6-19. Printed Wiring Board PANEL Board . 4

20、0 6-20. Schematic Diagram PANEL Board . 41 6-21. Printed Wiring Board TRANSFORMER Board . 42 6-22. Schematic Diagram TRANSFORMER Board . 43 6-23. IC Pin Function Description . 47 7.EXPLODED VIEWS 7-1.Case Section . 53 7-2.Front Panel Section-1. 54 7-3.Front Panel Section-2. 55 7-4.Front Panel Sectio

21、n-3. 56 7-5.Front Panel Section-4. 57 7-6.Chassis Section-1 . 58 7-7.Chassis Section-2 . 59 7-8.CD Mechanism Deck Section-1 (CDM74F-K6BD71A) . 60 7-9.CD Mechanism Deck Section-2 (CDM74F-K6BD71A) . 61 7-10. CD Mechanism Deck Section-3 (CDM74F-K6BD71A) . 62 7-11. Base Unit Section (BU-K6BD71A) . 63 8.

22、ELECTRICAL PARTS LIST. 64 RadioFans.CN 收音机爱 好者资料库 4 CX-JS7 SECTION 1 SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic

23、load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The la

24、ser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK C

25、arry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not

26、come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder

27、joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to fl

28、ow) than ordinary solder so use caution not to let solder bridges oc- cur such as on IC pins, etc. Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. RELEASING THE DISC TRAY LOCK The disc tray lock function for the antitheft o

29、f an demonstration disc in the store is equipped. Releasing Procedure : While pressing thexkey, press theZkey for 5 seconds. The message “UNLOCKED” is displayed and the tray is unlocked. Note: When “LOCKED” is displayed, the tray lock is not released by turning power on/off with the POWER key. 5 CX-

30、JS7 HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF. 2Turn the loading gear in the direction of arrow A. 1Remove the case (side-L). A 3Pull-out the disc tray. 6 CX-JS7 SERVICE POSITION CD mechanism deck Tape mechanism deck main board (CN312) Connect wire (flat type) (19 core) to main board (CN

31、312) and BD board (CN710). BD board (CN710) Connect wire (flat type) (13 core) to panel board (CN601) and mechanical deck. panel board (CN601) main board (CN203) 7 CX-JS7 SECTION 2 GENERAL This section is extracted from instruction manual. LOCATION OF CONTROLS 1 DISC CHANGE/DISC SKIP Rotates the CD

32、trays. 2 POWER 6STANDBY/ON Switches the unit on and off (standby). The red indicator flashes when receiving a signal from the remote. 3 TAPE A/B Selects Tape function, and deck A or B. TUNER BAND Selects Tuner function and the radio band. VIDEO (MD) Selects the function of external equipment connect

33、ed to VIDEO (MD) jacks. CD Selects CD function. 4 TREBLE/MIDDLE Enhances high or middle frequency sound. 5 CD SYNC Starts Automatic CD dubbing. REC PAUSE/START Starts recording. 6 PHONES jack Plug in here an optional headphones set with a mini stereo plug (3.5 mm). Speaker output is canceled. Main u

34、nit: front Refer to the pages indicated in parentheses for details. 7 DISC DIRECT PLAY 1-3 Selects a disc. 8 zOPEN/CLOSE Opens or closes the disc compartment. 9 HEAVY, VOCAL, SALSA, TECHNO, HIP HOP, MANUAL Activates a graphic equalization curve. 0 MODE Selects various modes (Play mode, etc.) when us

35、ed in combination with ENTER and MULTI JOG. ENTER Fixes the modes and the time (Play mode, etc.) when used in combination with MODE and MULTI JOG. ! MULTI JOG CD: skips to a previous or a succeeding track. Tuner: selects a preset station. Clock and Timer: sets the time. Selects the mode and the time

36、 when used in combination with MODE and ENTER. VOLUME Adjusts the volume. # BASS Adjusts low frequency sound. SURROUND Switches surround on and off. i-Bass Produces rich and clear low frequency sound. $ DISPLAY Displays the time and the remaining time for CD. When the unit is off, press DISPLAY to s

37、witch between DEMO, Clock and ECO display modes. ALBUM k/i Selects a previous album or a succeeding album with MP3-CDs. % rTUNING DOWN, tTUNING UP (f , g) CD: searches a track in fast forward or fast reverse playback when held down. Tape: fast forwards or rewinds the tape. Tuner: manually tunes down

38、 or up within the band. aPAUSE CD and Tapes: pauses playback. c CD and Tapes: starts playback. sSTOP CD and Tapes: stops playback. Main unit: rear Refer to the pages indicated in parentheses for details. 1 AM LOOP, FM 75 terminals Plug in the supplied AM and FM antennas here. 2 VIDEO (MD) jacks Acce

39、pts analog sound signals from external equipment. Connect using an optional connecting cable with RCA phono plugs (red plug to R jack, white plug to L jack). Refer also to the operating instructions of your equipment. To switch function to external input, press VIDEO (MD). Tip: To change the display

40、ed name for this function, turn the unit on, then hold down VIDEO (MD) and press POWER on the unit. Repeat the procedure to select “VIDEO” or “MD”. 3 SPEAKER terminals Connect the speaker cord of the supplied front speakers here. 4 AC power cord 8 CX-JS7 Buttons with the same or similar names with t

41、he main unit basically have the same function. 1 POWER 2 1-0/10, +10 Selects a CD track of the specified number. The numbered buttons take on these functions below when pressed together with SHIFT held down: EDIT Enters Automatic CD dubbing mode when pressed in stop mode. BAND Selects Tuner function

42、 and the radio band. TAPE A/B Selects Tape function, and deck A or B. SPECTRUM Changes the spectrum analyzer display. TUNER MODE Switches between stereo or monaural FM reception. GEQ Enters Graphic Equalizer setting mode. TUNER MEMORY Tuner: stores the received station in to preset. SURROUND Switches surround on and off. 3 r, t CD: selects a track. Tuner: selects a preset station. BASS, MID and TREB