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1、Ver 1.2 2001.07 With SUPPLEMENT 1 (9-923-346-82) ZS-M7 SERVICE MANUAL PERSONAL MINIDISC SYSTEM SPECIFICATIONS US Model AEP Model UK Model Tourist Model Model Name Using Similar MechanismNEW MD MD Mechanism TypeMDM-3EG Section Optical Pick-up TypeKMS-260A CD Model Name Using Similar MechanismNEW Sect
2、ion MD Mechanism TypeCDM-2411AAA Optical Pick-up TypeDAX-11A Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Continued on page 2 CD player Section SystemCompa
3、ct disc digital audio system Laser diode properties Material: GaAlAs Wave length: 785 nm Emission duration : Continuous Laser output : Less than 44.6 W (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.) S
4、pindle speed 200 r/min (rpm) to 500 r/min (rpm) (CLV) Number of programme positions 2 Frequency response 20 20,000 Hz +1 /2 dB Wow and flutter Below measurable limit Radio section Frequency range US Model : FM : 87.6 108 MHz AM: 530 1,710 kHz AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONI
5、C DISTORTION With 4-ohm loads, both channels driven from 100 10,000 Hz ; rated 7W per channel-minimum RMS power, with no more than 10% total harmonic distortion in AC operation (US Model). EXCEPT US Model : FM : 87.6 107 MHz MW : 531 1,602 kHz LW : 153 279 kHz IFFM : 10.7 MHz MW/LW : 450 kHz Aerials
6、FM : Telescopic areal Extension areal terminal AM : Extension areal terminals (US Model) MW/LW : Extension areal terminals (EXCEPT US Model) MD player section System Minidisc digital audio system DiscMiniDisc Laser diode properties Material: GaAlAs Wave length: 785 nm Emission duration : Continuous
7、Laser output : Less than 44.6 W (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.) 9-923-346-12 2001G0200-1 2001.7 Sony Corporation Personal Audio Company Shinagawa Tec Service Manual Production Group 收音机
8、爱好者资料库 Ra d i o Fa n s .CN 2 Specifications . 1 1.SERVICE NOTE. 3 2.GENERAL. 5 3.DISASSEMBLY 3-1. Cabinet (Front) ASSY, Cabinet (Rear) ASSY . 21 3-2. Left Key Board, Front Key Board, Top Key board, Right Key Board, Relay Board . 22 3-3. FL Board, Trans Board . 22 3-4. Tuner Board, FM ANT Board, AM A
9、NT Board. 23 3-5. MD Chassis ASSY . 23 3-6. MD Block ASSY, Filter Board . 24 3-7. Audio Board, HP Board, Line in Board. 24 3-8. Main Board, CD Block ASSY . 25 3-9. Shield Case (Top), Shield Case (Bottom). 25 3-10. DG Board, BD Board, MD Mechanism Deck. 26 3-11. Shutter ASSY. 26 3-12. SW Board . 27 3
10、-13. Slider ASSY, “Head, Over Write” . 27 3-14. MD Optical Pick-up Block . 28 3-15. Loading Board, “Tray ASSY, CD” . 29 3-16. CD Optical Pick-up Block, Pick-up Relay Board . 29 4.TEST MODE 4-1. Caution When Using the Test Mode. 30 4-2. Test Mode Settings . 30 4-3. Releasing the Test Mode. 30 4-4. Ba
11、sic Operations of the Test Mode. 30 4-5. Selecting the Test Mode. 30 4-6. Functions of Other Buttons . 31 4-7 Test Mode Display. 31 5.ADJUSTMENTS 5-1. Cautions When Checking Laser Diode Emission. 32 5-2. Cautions When Handling the Optical Pick-up (KSM-260A) . 32 5-3. Cautions During Adjustment . 32
12、5-4. Creating a Continuous Recording Disk . 32 5-5. Temperature Compensation Offset Adjustment. 33 TABLE OF CONTENTS Recording/Playback time Maximum 74 minutes (with MDW-74) Revolutions 400 rpm to 900 rpm (CLV) Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 4
13、4.1 kHz CordingAdaptive Transform Acoustic Cording (ATRAC) Modulation system EFM (Eight-to-Fourteen Modulation) Number of programme positions 2 stereo programme positions Frequency response 20 20,000 Hz +1 /2 dB Signal-to-noise ratio Over 80 dB (during playback) Wow and flutter Below measurable limi
14、t General Speaker Full range : 8 cm (3 in.) dia., 4ohms, cone type (2) Inputs LINE IN (stereo minijack) : Sensitivity 436 mV/691 mV Outputs Headphones jack (stereo minijack) (2) : For 32 ohms impedance headphones Power outputs 7 W + 7 W Power requirements For personal minidisc system : US Model:120V
15、 AC, 60Hz EXCEPT US Model :230V AC, 50Hz For remote commander : 3V DC, 2 size AA (R6) batteries Power consumption 30 W Dimensions (incl. projecting parts) Approx. 528 x 275 x 139 mm (w/h/d) (20 7/8 x 10 7/8 x 5 1/2 inches) Massapprox. 6.4 kg (14 lb. 2 oz) Supplied accessories Remote commander (1) AM
16、 loop aerial (1) (US Model) MW/LW loop aerial (1) (EXCEPT US Model) Speaker nets (2) (EXCEPT US Model) Design and specifications are subject to change without notice. 5-6. Laser Power Adjustment. 33 5-7. Traverse Adjustment . 33 5-8. Focus Bias Adjustment . 34 5-9. Error Rate Check . 35 5-10. Focus
17、Bias Check . 35 5-11. Adjustment and Connection Locations. 35 6.DIAGRAMS 6-1. Explanation of IC Terminals. 39 6-2. Block Diagram (1) . 46 6-3. Block Diagram (2) . 49 6-4. Printed Wiring Boards Main Section . 55 6-5. Schematic Diagram Main Section (1/2) . 59 6-6. Schematic Diagram Main Section (2/2)
18、. 63 6-7. Printed Wiring Boards Tuner Section (US Model) . 67 6-8. Schematic Diagram Tuner Section (US Model) . 69 6-9. Printed Wiring Boards Tuner Section (EXCEPT US Model) . 72 6-10. Schematic Diagram Tuner Section (EXCEPT US Model) . 74 6-11. Schematic Diagram BD Section . 77 6-12. Printed Wiring
19、 Boards BD Section . 79 6-13. Schematic Diagram Power Section . 82 6-14. Printed Wiring Boards Power Section . 85 6-15. Schematic Diagram DG Section . 87 6-16. Printed Wiring Boards DG Section . 90 6-17. Printed Wiring Boards Front Key Section . 93 6-18. Schematic Diagram Front Key Section . 97 7.EX
20、PLODED VIEWS 7-1. Front Cabinet Section . 106 7-2. Rear Cabinet Section . 107 7-3. Chassis Section . 108 7-4. MD Section (1) . 109 7-5. MD Section (2) .110 7-6. CD Section.111 7-7. Optical Pick-up Section .112 8.ELECTRICAL PARTS LIST.113 收音机爱好者资料库 Ra d i o Fa n s .CN 3 SAFETY CHECK-OUT (US Model) Af
21、ter correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer : Check the 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 le
22、akage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5mA (500 microampers). Leakage current can be measured by any one of three methods. 1.A commercial leakage tester, such as the Simpson 229 or RCA
23、 WT-540A. Follow the manufacturers instructions to use these instruments. 2.A battery-operated AC milliammeter. The Data Precision 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” indicatio
24、n is 0.75V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR B
25、ASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the pri
26、nted 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 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 b
27、lock. Therefore, when checking the laser diode emission, ob- serve more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1.Close the lid for CD. 2.Press CD button. 3.Confirm the laser diode emission while observing the objecting lens. When there is no emission, A
28、uto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down once for the focus search. AC voltmeter (0.75V) To Exposed Metal Parts on Set Earth Ground 0.15 F 1.5k Fig. A. Using an AC voltmeter to check AC leakage. CAUTION DURING WHEN MOUNTING THE PULLEY FOR THE LOADING M
29、OTOR Make the following adjustment when mounting the loading motor (part number : 1-698-999-11) and motor pulley (part number : 2- 627-174-01) of the CD section. Specification : A = 0.9 to 1.1mm SECTION 1 SERVICE NOTE SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE W
30、ITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around
31、 270C during 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. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side
32、 of a tantalum capacitor may be dam- aged by heat. 收音机爱好者资料库 Ra d i o Fa n s .CN 4 ABOUT THE BD BOARD WAVEFORM CHECKING JIG The special jig (J-2501-124-A) is highly convenient when check- ing the waveform of the BD board of the MD section. Pin names and items to check are as follows: I+3V : for IOP
33、measurement (check for depleted optical pickup laser) IOP: for IOP measurement (check for depleted optical pickup laser) TEO : TRK error signal (traverse adjustment) VC: Standard level for checking signals RF: RF signal (jitter check) RESET button BD board CN110 DG board I + 3V IOP TEO VC RF Jig (J-
34、2501-124-A) MD block section ABOUT THE HARDWARE RESET It is possible to reset the system microcomputer by pressing the RESET button located on the rear with a pointed object. Use this button when the unit cannot be operated properly due to such prob- lems as microcomputer errors, etc. 5 SECTION 2 GE
35、NERAL LOCATION AND FUNCTION OF CONTROLS FRONT PANEL : RADIO section 1 CD (MD SYNCHRO REC button DISC ALL REC IT : TO TOP TO END 2 MD insert section 3 TUNE, + 0, ) , button 4 EDIT button 5 DELETE button 6 INSERT button 7 AUTO PRESETSHUF/PGM button 8 LINE LEVELMONO/STREPEAT button 9 ENTERYES button !
36、Jog dial =/+ AMS PRESET ! CANCELNO button ! 6 MD EJECT button ! 6 CD OPEN/CLOSE button ! CD operation buttons (play/pause) p (stop) ! CD tray ! BAND button ! MD operation button (play/pause) p (stop) ! REC button FRONT PANEL : TIMER COM section ! POWER button (US MODEL) OPERATE button (EXCEPT US MOD
37、EL) SLEEP button STANDBY button TIMER button CLOCK button Display window BASS/TREBLE button MEGA BASS button VOLUM , + button DISPLAY button 2 (Headphones) Jack (stereo mini jack) # LINE button # Remote control receiver section 6 1 SLEEP button 2 CD OPEN/CLOSE button 3 Number button 4 MODE button 5
38、BASS/TREBLE+, button 6 MEGA BASS button 7 MD operation button ( (play) P (pause) p (stop) r (REC) 8 CD operation button ( (play) P (pause) p (stop) 9 Radio operation button BAND TUNER , + ! POWER button(US MODEL) OPERATE button (EXCEPT US MODEL) ! VOL +, button ! =, + (AMS/SERCH) button # AM ANTENNA
39、 terminal MW(LW) ANTENNA terminal # FM EXT ANTENNA terminal (US model) ANTENNA SELECTOR switch (Except US model) # LINE IN (Analog) terminal # Antenna # RESET button # Power cord # FM EXT ANTENNA terminal (Except US model) REMOTE CONTROLREAR PANEL section EXCEPT US Model # 7 This section is extracte
40、d from instruction manual. 8 9 10 11 12 13 14 15 16 17 18 19 20 21 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. CABINET (FRONT) ASSY, CABINET (REAR) ASSY r The equipment can be removed using the following procedure. 3 Screws (2.6X10) 3 Screws (2.6X
41、10) 7 CN410 (11 pin) (Relay board) 4 Screws (3X45) 2 Screws (+BVTP 3X12) 1 5 1 2 Screws (+BVTP 3X12) 6 CN353 (4 pin) (Audio board) Net (L) ASSY, SP Net (R) ASSY, SP 2 Screws (+BVTP 3X12) Cabinet (Rear) ASSY Cabinet (Front) ASSY Cabinet (Front) ASSY Left key board, Front key board, Top key board, Rig
42、ht board, Relay board Cabinet (Rear) ASSY Set FL board, Trans board, Tuner board, FM ANT board, AM ANT board MD chassis ASSYMD Block ASSY, Filter board Audio board, HP board, Line in board Main boardCD block ASSY MD Block ASSY Shiled case (Top, Bottom) DG boardBD boardSub chassis ASSYShutter ASSY MD mechanism deck MD Optical pick-up block SW board, Slider ASSY, “Head, Over wright” “Tray AS
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