Philips-FWC-788-Service-Manual(1)电路原理图.pdf

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1、GBCLASS 1LASER PRODUCTCOMPACTDIGITAL AUDIOService ManualServiceServiceServiceFW-C788/21/21M/37TABLE OF CONTENTSPageLocation of pc boards fr Reparaturen sind Original-Ersatzteile zu verwenden.ILe norme di sicurezza esigono che lapparecchio venga rimessonelle condizioni originali e che siano utilizzat

2、i i pezzi di ricambioidentici a quelli specificati.“After servicing and before returning set to customer perform aleakage current measurement test from all exposed metal parts toearth ground to assure no shock hazard exist. The leakage currentmust not exceed 0.5mA.“CLASS 1LASER PRODUCT3122 110 03420

3、GB Warning !Invisible laser radiation when open.Avoid direct exposure to beam.S Varning !Osynlig laserstrlning nr apparaten r ppnad och sprrenr urkopplad. Betrakta ej strlen.SF Varoitus !Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiinankymttmlle laseristeilylle. l katso steeseen!DK

4、Advarse !Usynlig laserstrling ved bning nr sikkerhedsafbrydere erude af funktion. Undg udsaettelse for strling.1-63. Lift up and out1. Place screw driver(flat side) betweenthe cassette cover& cassette door2. Twist screw driverDISMANTLING INSTRUCTIONSDismantling of the Cassette Cover1) Loosen 4 screw

5、s to remove the Cover Top (pos 255) of theset.2) Loosen 3 screws to remove the Panel Left (pos 253) and3 screws to remove the Panel Right (pos 254) of the set.3) Slide out the CDC Tray as shown in the diagram below withthe help of a flat head screw driver.Cassette CoverRemove Cassette CoverDismantli

6、ng of the CDC Module and Front Panel AssemblyRemove CDC Module4) Remove the Cover Tray CDC (pos 106) as indicated.Front View CDCRemove Cover Tray CDCDismantling of the CDC Module and Front Panel AssemblySliding out the CDC Tray5) Loosen 2 screws A and 2 screws B to remove the CDCModule (pos 1105) as

7、 indicated.6) Remove 2 screws (pos 226) at the bottom to separate theFront Panel Assembly from the Plate Bottom (pos 265).2-1 2-12-2 2-2Dismantling of the ETF Tape Module1) Remove 6 screws G as indicated to loosen the ETF TapeModule (pos 1104).Dismantling of the Rear PortionDismantling of the Front

8、Display Board and Front Control Board1) Remove 1 screw C as indicated to loosen the HeadphoneBoard (pos 1101-B).2) Remove 5 screws D as indicated to loosen the FrontDisplay Board (pos 1101-A).3) Remove 9 screws E as indicated to loosen the FrontControl Board (pos 1107-A).4) Remove 1 screw F as indic

9、ated to loosen the IR-EyeBoard (pos 1107-D).5) Remove 3 screws N as indicated to loosen the VU MeterBoard (pos 1107-C).1) The Knob Volume Gloss Black (pos 117) can be removeby inserting a strong string into the slot and pull it out inthe direction as indicated. See picture 1.2) The Knob Jog Rotary (

10、pos 140) can be remove byinserting a strong string into the slot and pull it out in thedirection as indicated. See picture 2.Picture 1Picture 2Repair Hints1) Remove 3 screws J and uncatch M1 as indicated toloosen the AF Board (pos 1102-A).2) Remove 3 screws K and uncatch M2 as indicated toloosen the

11、 Tuner Board (pos 1103).3) Remove 4 screws L as indicated to loosen the PanelRear (pos 256).Remove AF BoardRemove VU Meter BoardRemove Front Display Board and Headphone BoardRemove Front Control Board and IR-Eye Board2-3 2-3Service position DService position AService position CRepair Hints3) During

12、repair it is possible to disconnect the Tuner boardand CDC Module completely unless the fault is sus-pected to be in that area. This will not affect theperformance of the rest of the set.4) Due to the short flex cable wires in the ETF Module, thepc board should be disconnected and reconnected onthe

13、reverse side of the tape mechanism to keep itelectrically connected during repair. See picture 3.Note: The flex cables are very fragile, care should be takennot to damage them during repair. After repair, bevery sure that the flex cables are inserted properlyinto the flex sockets before encasing, ot

14、herwise faultsmay occurs.Picture 3Service position BTable 2Error codeE1000E1001E1002E1003E1005E1006E1007E1008E1020E1070E1071E1079Error DescriptionFocus ErrorTriggered when the focus could not be found within a certain time when starting up the CDor when the focus is lost for a certain time during pl

15、ay.Radial ErrorTriggered when the radial servo is off-track for a certain time during play.Sledge In ErrorThe sledge did not reach its inner position (inner-switch is still close) before approximately6 Sec. have passed by. Inner-switch or sledge motor problem.Sledge Out ErrorThe sledge did not come

16、out of its inner position (inner-switch is still open) before approximately250 mSec. have passed by. Inner-switch or sledge motor problem.Jump-offtrack errorTriggered in normal play when the jump destination could not be found within a certain time.When this error occurred, software will try to reco

17、ver by initiating the jump command again.If it is recoverable, the disc will continue to play.Subcode ErrorTriggered when a new subcode was missing for a certain time during play.PLL ErrorThe Phase Lock Loop could not lock within a certain time.Turntable Motor ErrorGenerated when the CD could not re

18、ached 75% of speed during startup within a certain time.Discmotor problem.Focus Search ErrorThe focus point has not been found within a certain time.The carousel switch is not open within certain time. This can happen when either the switch isdefective and closed all the time, or when the carousel i

19、s blocked when located exactly at adisc position.The carousel position switch did not close within a certain time. This can happen when theswitch is defective and never closes electrically, or when the carousel is blocked in betweentwo disc positions. The time-out is approximately 5 Sec.The drawer c

20、ould not enter the inside position is opening again. This can be caused becausethe drawer is blocked by something and cannot go fully inside, or the drawer switch is defectiveand does not close.STANDBY-ONButton pressed?YNSet is in Service PLAY Mode.The Service Play Mode is intended todetect and iden

21、tify the failures in the CD Mode.In this mode the electronics will still functioneven when an error is detected so thatrepair activities can be carried out.SERVICEPLAY MODEIn case of failures, errorcodes according to Table 2 will be displayed.Variousother TestsActivated with ACTIONTESTQEEPROM FORMAT

22、TESTLoad default data. Display shows “NEW“ for 1 second.Caution!All presets from the customer will be lost!Disconnectmains cordLEAVE SERVICETESTPROGRAMR 9 to ExitEEPROM TEST A test pattern will be sent to the EEPROM.“PASS“ is displayed if the uProcessor read back thetest pattern correctly, otherwise

23、 “FAIL“ will be displayed.Rotary Volume KnoborJog Shuttle KnobROTARYENCODER TESTDisplay shows value for 2 seconds.Values increases or decreases in steps of 1 until 0 (Min.)or 40 (Max.) is reached.DSCDEMO TOGGLE Pressing this button will toggle between DEMO ON andDEMO OFF. The DEMO status will scroll

24、 once acrossthe Display.OButton pressed?YYYNNNOButton pressed?9Button pressed?Display shows12MOutput at (Front Display Board)pin 19 of uP = 2,929.6875HzDisplay shows32KOutput at (Front Display Board) pin 19 of uP = 2048HzQUARTZTESTTUNERButton pressed?DisconnectMains cord ?YNNYDisplay Tuner Version “

25、ccc“Service frequencies arecopied to the RAM (see Table 1)Tuner works normally except:PROGRAM buttonService Mode leftTUNERTESTTUNERButton pressed?NPRESET1234567891011Europe“EUR“87.5MHz108MHz531kHz1602kHz558kHz1494kHz153kHz279kHz198kHz98MHz87.5MHzEast Eur.“EAS“87.5MHz108MHz531kHz1602kHz558kHz1494kHz8

26、7.5MHz87.5MHz87.5MHz87.5MHz98MHzUSA“USA“87.5MHz108MHz530kHz1700kHz560kHz1500kHz98MHz87.5MHz87.5MHz87.5MHz87.5MHzOversea“OSE“87.5MHz108MHz531/530kHz*1602/1700kHz*558/560kHz*1494/1500kHz*87.5/98MHz*87.5MHz87.5MHz87.5MHz98/87.5MHz*Table 1East Eur. Extended-band“EAS“65.81MHz108MHz74MHz87.5MHz531kHz1602k

27、Hz558kHz1494kHz98MHz70.01MHz65.81MHzNote: * Depending on the selected grid frequency (9 or 10kHz)By holding the TUNER and R buttons depressed while switching on the Mains supply, oneof the undermentioned features will be activated:- the tuning grid frequency is toggled between 9kHz and 10kHz for the

28、 Oversea (/21) version.- the extended FM1 (65.81MHz - 74MHz) is toggled on and off for East Eur. (/34) version.YNYNYN2Button pressed?2Button pressed?9Button pressed?DISPLAYTESTDisplay shows Figure 1 andswitch all LEDs on (except ECOPOWER & *VU Volume LEDs),and full VU deflection.Display shows Figure

29、 2and switch alternate LEDs on(see Table 3),and partial VU deflection.Figure 1Figure 2LEDsDISC 1DISC 3TAPETUNERCENTRESURROUND LEFTSTEREO RIGHTVACDBBVU BACK LIGHT*VU VOLUME* Only applicable for set with VU Volume LED.FW-C500 , FW-C550FW-C555OnOnOnOnOnOnOnOnFW-C700 , FW-C720FW-C780 , FW-C785FW-C788 ,

30、FW-C798OnOnOnOnOnOnOnFW-P750OnOnOnOnOnOnOnOnOnOnOnTable 3To start service test programhold & Auxdepressed whileplugging in the mains cordDisplay shows theROM version “S-Vyy“(Main menu)S refers to Service ModeV refers to Versionyy refers to Software version number of the uProcessor(counting up from 01 to 99)SERVICE TEST PROGRAMMini2001/Mini2002 FW-C5xx/7xx Service Test Program (dd wk0151)3-1 3-1