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1、SERVICE MANUAL COMPACT DISC DECK RECEIVER AEP Model UK Model E Model CX-JT7 Ver 1.0 2003.04 9-877-252-01Sony Corporation 2003D0500-1Home Audio Company C 2003.04Published by Sony Engineering Corporation SPECIFICATIONS CX-JT7 is the tuner, amplifier, cassette deck and CD player section in JAX-T7 and J
2、AX-PK7. Model Name Using Similar MechanismNEW CD CD Mechanism TypeCDM74F-K6BD71A Section Base Unit NameBU-K6BD71A Optical Block NameKSM-213DCP Optical Pick-up NameKSS-213D Tape deck Model Name Using Similar MechanismNEW Section Tape Transport Mechanism Type CWM43FR16 CWM43RR23 TUNER FM tuning range8
3、7.5 MHz to 108 MHz FM usable sensitivity (IHF)16.8 dBf FM antenna terminal75 ohms (unbalanced) AM tuning range531 kHz to 1602 kHz AM usable sensitivity350 V/m AM antennaLoop antenna AMPLIFIER Power outputRated: 80 W + 80 W (6 ohms, T.H.D. 1 %, 1 kHz/DIN 45500) Reference: 100 W + 100 W (6 ohms, T.H.D
4、. 10 %, 1 kHz/DIN 45324) MUSIC POWER: 225 W + 225 W Total harmonic distortion0.08 % (50 W, 1 kHz, 6 ohms, DIN AUDIO) InputMD (VIDEO): 1.5 V OutputsSPEAKERS: 6 ohms or more PHONES: 32 ohms or more CASSETTE DECK Track format4 tracks, 2 channels stereo Frequency response50 Hz 8 kHz Recording systemAC b
5、ias 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 Power requirements230 V AC, 50/60 Hz P
6、ower consumption130 W Power consumptionWith ECO mode on: 0.25 W in standby modeWith ECO mode off: 20 W Dimensions (W x H x D)280 x 328 x 437 mm (AEP, UK, CIS) 280 x 328 x 446 mm (MX, E51) Weight8.4 kg (AEP, UK, CIS) 9.3 kg (MX, E51) Specifications and external appearance are subject to change withou
7、t 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. Abbreviation E51: Chilean and Peruvian models MX: Mexican model RadioFans.CN 收音机爱 好者资料库 CX-JT7 2
8、CLASS 1 LASER PRODUCT LUOKAN 1 LASER LAITE KLASS 1 LASER APPARAT This appliance is classified as a CLASS 1 LASER product. This label is located on the rear exterior. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may
9、be dam- 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
10、. CAUTION 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 CRITI
11、CAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. RadioFans.CN 收音机爱 好者资料库 CX-JT7 3 TABLE OF CONTENTS 1.SERVICING NOTES.4 2.GENERAL Location of Controls .7 3.DISASSEMBLY 3-1.Disassembly Flow .9 3-2.
12、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 . 13 3-10. POWER Board . 14 3-11. TRANSFORMER Board . 14 3-12. Table Assy . 15 3-13. Motor (TB) Boar
13、d . 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 Section . 21 6.DIAGRAMS 6-1.Block Diagram CD Section . 22 6-2.Block Diagram TUNER/TAPE/PANEL Section
14、 . 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 Wiring Boards CHANGER Section . 28 6-8.Schematic Diagram CHANGER Section . 29 6-9.Schematic Diag
15、ram MAIN Board (1/4) (Suffix-11) . 30 6-10. Schematic Diagram MAIN Board (2/4) (Suffix-11) . 31 6-11. Schematic Diagram MAIN Board (3/4) (Suffix-11) . 32 6-12. Schematic Diagram MAIN Board (4/4) (Suffix-11) . 33 6-13. Printed Wiring Board MAIN Board (Suffix-11) . 34 6-14. Printed Wiring Board MAIN B
16、oard (Suffix-13) . 35 6-15. Schematic Diagram MAIN Board (1/4) (Suffix-13) . 36 6-16. Schematic Diagram MAIN Board (2/4) (Suffix-13) . 37 6-17. Schematic Diagram MAIN Board (3/4) (Suffix-13) . 38 6-18. Schematic Diagram MAIN Board (4/4) (Suffix-13) . 39 6-19. Printed Wiring Boards CD BUTTON/ HEADPHO
17、NE/MICROPHONE Boards . 40 6-20. Schematic Diagram CD BUTTON/HEADPHONE/ MICROPHONE Boards . 41 6-21. Printed Wiring Board PANEL Board . 42 6-22. Schematic Diagram PANEL Board . 43 6-23. Schematic Diagram POWER Board (1/2) . 44 6-24. Schematic Diagram POWER Board (2/2) . 45 6-25. Printed Wiring Board
18、POWER Board (AEP, UK, CIS models) . 46 6-26. Printed Wiring Board POWER Board (MX model). 47 6-27. Printed Wiring Board POWER Board (E51 model). 48 6-28. Printed Wiring Board TRANSFORMER Board (AEP, UK, CIS models) . 49 6-29. Printed Wiring Board TRANSFORMER Board (MX model). 50 6-30. Printed Wiring
19、 Board TRANSFORMER Board (E51 model). 51 6-31. Schematic Diagram TRANSFORMER Board (AEP, UK, CIS, E51 models). 52 6-32. Schematic Diagram TRANSFORMER Board (MX model). 53 6-33. IC Pin Function Description . 57 7.EXPLODED VIEWS 7-1.Case Section . 63 7-2.Front Panel Section-1. 64 7-3.Front Panel Secti
20、on-2. 65 7-4.Front Panel Section-3. 66 7-5.Front Panel Section-4. 67 7-6.Chassis Section-1 . 68 7-7.Chassis Section-2 . 69 7-8.CD Mechanism Deck Section-1 (CDM74F-K6BD71A) . 70 7-9.CD Mechanism Deck Section-2 (CDM74F-K6BD71A) . 71 7-10. CD Mechanism Deck Section-3 (CDM74F-K6BD71A) . 72 7-11. Base Un
21、it Section (BU-K6BD71A) . 73 8.ELECTRICAL PARTS LIST. 74 Abbreviation E51: Chilean and Peruvian models MX: Mexican model RadioFans.CN 收音机爱 好者资料库 4 CX-JT7 D324 CN309 IC303 CN312 MAIN BOARD (Conductor Side) SECTION 1 SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser di
22、ode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic 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
23、 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 laser 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, w
24、hen checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times. MODEL IDENTIFICATION Back Panel MODELP
25、ART No. Chilean and Peruvian models4-245-109-4 AEP, UK, CIS and Mexican models4-245-109-5 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 come printed with the lead
26、 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 joint for a slightly longe
27、r 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 flow) than ordinary solder s
28、o 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. PART No. DISCRIMINATION Either type of the MAIN board, Part No. 1-688-080-11 or 1-688- 080-13 is used
29、for Chilean and Peruvian models. Note: For other models, only one type of the MAIN board, Part No. 1- 688-080-13 is used. How to identify the type is described below. D324 Suffix-11 Suffix-13a 5 CX-JT7 HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF. 2Turn the loading gear in the direction of
30、arrow A. 1Remove the case (side-L). A 3Pull-out the disc tray. 6 CX-JT7 SERVICE POSITION CD mechanism deck Tape mechanism deck main board (CN312) Connect wire (flat type) (19 core) to main board (CN312) and BD board (CN710). BD board (CN710) Connect wire (flat type) (13 core) to panel board (CN801)
31、and mechanical deck. panel board (CN801) main board (CN203) 7 CX-JT7 SECTION 2 GENERAL This section is extracted from instruction manual. LOCATION OF CONTROLS 1 DISC CHANGE/DISC SKIP Rotates the CD trays. 2 POWER 6STANDBY/ON Switches the unit on and off (standby). The red indicator flashes when rece
32、iving 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. MD (VIDEO) Selects the function of external equipment connected to MD (VIDEO) jacks. CD Selects CD function. 4 TREBLE/MIDDLE Enhances high or middle frequency soun
33、d. 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. MIC jack (Mexican, Chilean and Peruvian models) Connects the microphone here. MIC MIXING (Mexican, Chilean a
34、nd Peruvian models) Adjusts the microphone volume. Main unit: 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 curv
35、e. 0 MODE Selects various modes (Play mode and Tape reverse, etc.) when used in combination with ENTER and MULTI JOG. ENTER Fixes the modes and the time (Play mode and Tape reverse, etc.) when used in combination with MODE and MULTI JOG. ! MULTI JOG CD: skips to a previous or a succeeding track. Tun
36、er: selects a preset station. Clock and Timer: sets the time. Selects the mode and the time when used in combination with MODE and ENTER. VOLUME (10) Adjusts the volume. # BASS Adjusts low frequency sound. SURROUND Switches surround on and off. i-Bass Produces rich and clear low frequency sound. $ D
37、ISPLAY Displays the time and the remaining time for CD. When the unit is off, press DISPLAY to switch between DEMO, Clock and ECO display modes. ALBUM k/i Selects a previous album or a succeeding album with MP3-CDs. PTY (AEP and UK models) Displays a program type for RDS (Radio Data System) % rTUNIN
38、G 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 or up within the band. aPAUSE CD and Tapes: pauses playback. dDIR (TAPE B) CD and Tapes: starts playback. sSTOP CD and Tapes: s
39、tops 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 MD (VIDEO) jacks Accepts analog sound signals from external equipment. Connect using an optional connecting cable with RCA phono plugs (r
40、ed 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 MD (VIDEO). Tip: To change the displayed name for this function, turn the unit on, then hold down MD (VIDEO) and press POWER on the unit. Repeat the procedure to select “MD” or “VIDEO ”. 3 SPEAKER terminals Conn
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