JVC-FSSD990-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOMPACT COMPONENT SYSTEMNo.20947Apr. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.FS-SD990 / FS-SD770FS-SD550ContentsSafety PrecautionsImportant for laser productsPreventing static electricityDismantling and assembling the traverse unitDisassembly methodMaintenance of laser pickupRe

2、placement of laser pickupFlow of functional operation unit TOC readMethod of connecting treatment device wireDescription of major ICs 1-21-31-41-51-61-151-151-161-171-18FS-SD990 / FS-SD770FS-SD550Area SuffixJCU.S.ACanadaThese models not have adjustment.The difference between FS-SD550 and FS-SD770 FS

3、-SD990 is only the speaker systems.The difference between FS-SD770 and FS-SD990 is cabinets of the speaker.REMOTE CONTROL DIMMERSLEEPDISPLAYFM MODEPOWERAHB PROCDPROGRAMDOORSLIDEAUTOPRESETREPEATRANDOMBASSTREBLECANCELUPSETDOWNMD/AUXFM / AMVOLUMECDFADE MUTINGFS-SD550FS-SD770, FS-SD990REMOTE CONTROL DIM

4、MERSLEEPDISPLAYFM MODEPOWERAHB PROCDPROGRAMDOORSLIDEAUTOPRESETREPEATRANDOMBASSTREBLECANCELUPSETDOWNMD/AUXFM / AMVOLUMECDFADE MUTINGRadioFans.CN 收音机爱 好者资料库FS-SD990 / FS-SD770FS-SD5501-21. This design of this product contains special hardware and many circuits and components specially for safety purpo

5、ses. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circu

6、itry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many ele

7、ctrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replace

8、ment parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not

9、 have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high te

10、mperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5. Leakage currnet check (El

11、ectrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electric

12、al shock.Do not use a line isolation transformer during this check.Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to

13、a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F A

14、C-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to eachexposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage a

15、cross the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal resp

16、onsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local

17、 voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of th

18、is system.In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be sure to us

19、e the parts of the same type and rating as specified by the manufacturer. (Except the JC version)RadioFans.CN 收音机爱 好者资料库FS-SD990 / FS-SD770FS-SD5501-3Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct expo

20、sure to beam.3.CAUTION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiat

21、ion when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function.6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified

22、herein may result in hazardous radiation exposure.VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen.ADVARSEL : Usynlig laserstrling ved bning , nr sikk

23、erhedsafbrydere er ude af funktion. Undg udsttelse for strling.ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling.REPRODUCTION AND POSITION OF LABELSWARNING LABELDANGER : Invisible laser radiation when open and interlock or defeated.AVOID DIRECT E

24、XPOSURE TO BEAM (e)VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s)VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen. (d)ADVARSEL :Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude a

25、f funktion. Undg udsttelse for strling. (f)!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.FS-SD990 / FS-SD770FS-SD5501-4Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in th

26、e body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.1. Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices s

27、uch as DVD players. Be careful to use proper grounding in the area where repairs are being performed. 1.1.1. Ground the workbench1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.1.1.2.

28、Ground yourself1. Use an anti-static wrist strap to release any static electricity built up in your body. 1.1.3. Handling the optical pickup1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After rep

29、lacement, return the shorted parts to their original condition. (Refer to the text.)2. Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.2. Handling the traverse unit (optical pickup)1. Do not

30、subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. 2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin

31、when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. 3. Handle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn itCond

32、uctive material (conductive sheet) or iron plate(caption)Anti-static wrist strapFS-SD990 / FS-SD770FS-SD5501-5 Dismantling and assembling the traverse unitNotice regarding replacement of optical pickupElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc

33、. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs to the optical pickup or connected devices. 1. Do not touch the area around the laser diode and actuator.2. Do not check the laser diode using a tester, as the diode

34、may easily be destroyed.3. It is recommended that you use a grounded soldering iron when shorting or removing the laser diode. Recommended soldering iron: HAKKO ESD-compatible product4. Solder the land on the optical pickups flexible cable. Note : Short the land after shorting the terminal on the fl

35、exible cable using a clip, etc., when using an ungrounded soldering iron. Note : After shorting the laser diode according to the procedure above, remove the solder according to the text explanation. ShortingFlexible cable KSM-900AAHSub board(Reverse side)FS-SD990 / FS-SD770FS-SD5501-6Piror to perfor

36、ming the following procedure, remove the CD door.Remove the ten screws B and the five screws C attaching the rear cover on the back of the body.1.Removing the rear cover (See Fig.2)Remove the four screws A attaching the CD door on the upper side of the body.1.Removing the CD door (See Fig.1)Prior to

37、 performing the following procedure, remove the CD door, the rear cover.Remove the four screws D attaching the side covers on the bottom of the body.Move the left cover backward and remove outward. Also remove the right cover in the same way.1.2.Removing the right and left covers (See Fig.3)Disassem

38、bly methodFig.1Fig.2Fig.3BBBBBBCCCRear coverDDRight coverLeft coverBottomCD doorAAFS-SD990 / FS-SD770FS-SD5501-7Prior to performing the following procedure, remove the CD door, the rear cover and the side covers.Remove the three screws E on the bottom of the body.Release two joints a and two joints

39、b on both sides of the body using a screwdriver and remove the front panel assembly toward the front.1.2.Removing the front panel assembly (See Fig.4 to 6)Prior to performing the following procedure, remove the CD door, the rear cover, the side covers and the front panel assembly.Disconnect the card

40、 wire from connector CN104 and CN105 of the main board in the front part of the body. Disconnect the card wire from CN101 of the main board on the right side, and the wire from CN705 and CN708 of the CD mechanism base assembly respectively.Remove the four screws F attaching the CD mechanism base ass

41、embly on the upper side of the body. Remove the screw I attaching the earth terminal on the right side.1.2.Removing the CD mechanism base assembly (See Fig.7 to 14)Fig.4Fig.6Fig.5EFront panel assembly(Left side)(Right side)Front panel assemblyJoints aJoints bBottomFig.7Fig.8FFCD mechanism base assem

42、blyCD mechanism base assemblyMain bardCN105CN104Front panel assemblyFS-SD990 / FS-SD770FS-SD5501-8Remove the screw G attaching the power amplifier board on the back of the body. Disconnect the wire from connector CN301 and pull the power amplifier board fully outward.Raise the right and left door ar

43、ms by turning the gear a in the rear of the power amplifier board.After the CD mechanism base assembly is detached from the door arms, pull the CD mechanism base assembly toward the front and disconnect the wire from connector CN804 on the left side of the door arm board.Pull out the CD mechanism ba

44、se assembly toward the front.3.4.5.6.Fig.9Fig.10Fig.11FICD mechanism base assemblyMain boardCN101CN708FCD mechanism base assemblyCN804CD mechanism base assemblyCN301GPower amplifier boardFig.13Gear aFig.12Fig.14CD mechanism base assemblyPower amplifier boardDoor armDoor armIGear aCD mechanism base a

45、ssemblyDoor arm board (L)CN804CN705FS-SD990 / FS-SD770FS-SD5501-9Prior to performing the following procedure, remove the rear cover, the side covers, the front panel assembly and the CD mechanism base assembly.In case that the upper parts of the door arms attached to the CD door are not level, let d

46、own them to the level position by turning the gear a in the direction of the arrow.1.Removing the door arm assembly / the door arm board (R) and (L)(See Fig.15 to 20)When the door arms incline, the door arm assembly and the door arm board (R) and (L) may not be removed.ATTENTION: Remove the four scr

47、ews H on the upper side and the one screw I on the left side of the body.Remove the four screws J attaching the door arm board (L) and (R) on both sides of the door arm assembly.2.3.Fig.15Fig.16Fig.18Fig.20Fig.17Fig.19Door armDoor arm board (L)Door armDoor arm board (R)Door arms (Attached to the CD

48、door)HHDoor arm assemblyDoor arm assemblyJJIDoor arm board (L)Door arm assemblyJJDoor arm board (R)Fan motorFS-SD990 / FS-SD770FS-SD5501-10Prior to performing the following procedure, remove the CD mechanism base assembly.Disconnect the wires from connector CN102 and CN193 on the main board and rele

49、ase them from the cord stopper respectively.Remove the two screws K and the two screws L attaching the heat sink and the power amplifier board.1.2.Removing the power amplifier board(See Fig.21 and 22)Prior to performing the following procedure, remove the CD mechanism base assembly.Disconnect the wi

50、res from connector CN191 and CN192 on the main board and release them from the cord stopper respectively.Remove the four screws M attaching the transformer assembly.1.2.Removing the transformer assembly (See Fig.21)Prior to performing the following procedure, remove the CD mechanism base assembly an