Philips-MCM-8-Service-Manual电路原理图.pdf

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1、CLASS 1LASER PRODUCTService ManualServiceServiceServiceMCM8/21/22/25/30/37TABLE OF CONTENTSPageLocation of pc boards fr Reparaturen sind Original-Ersatzteile zu verwenden.Sicherheitsbauteile sind durch das Symbol !markiert.ILe norme di sicurezza esigono che lapparecchio venga rimessonelle condizioni

2、 originali e che siano utilizzati i pezzi di ricambioidentici a quelli specificati.Componenty di sicurezza sono marcati con !GBAfter servicing and before returning set to customer perform a leakagecurrent measurement test from all exposed metal parts to earth ground toassure no shock hazard exist. T

3、he leakage current must not exceed0.5mA.DISMANTLING INSTRUCTIONSDismantling of the Cover Cassette and Universal Loader1) Remove the Cover Cassette (pos 150) in the direction asshown in Figure 1.2) Loosen 4 screws to remove the Cover Top (pos 240) bysliding it out towards the rear before lifting up.-

4、 2 screws on the rear- 1 screw each on the left & right side3) Loosen 2 screws each to remove the Panel Left (pos 180)and Panel Right (pos 181). The Panels are removed bysliding it towards the rear and outwards.- 1 screw on the rear- 1 screw on the side- see Service position A4) Use a screw driver t

5、o give a push in the direction as shownin Figure 2 and Figure 2A to unlock the Loader Tray beforesliding it out.5) Slide out the Loader Tray and remove the Cover CD (pos110 + pos 111) in the direction as shown in Figure 3.6) Loosen 4 screws A (see Figure 4) to remove the BracketModule Mounting (pos

6、156) and Universal Loader (pos1103).- 2 screws each on the left & right sideDetaching the Universal Loader from the Bracket Module Mounting2-1 2-1Figure 1Figure 2Figure 3 Figure 4Figure 6Figure 7A Figure 71) Remove 2 screws C (see Figure 6) from the bottom of theCabinet Front (pos 101).Detaching the

7、 Front Panel assembly from the Bottom/Rear assembly2) Release the fixation of the Combi Board (pos1102-1001)to Bracket Combi (pos 155) by releasing the 2 catches C1(see Figure 7) and pulling the Combi Board outwards asshown in Figure 7A.3) Uncatch 2 catches C2 (see Figure 7) on the left & rightsides

8、 of the Cabinet Front (pos 101) and slides the FrontPanel assembly out towards the front.- see Service position CFigure 51) Slide out the Loader Tray fully and remove 4 screws B (seeFigure 5) to detach the Universal Loader (pos 1103) fromthe Bracket Module Mounting (pos 156).- see Service position B

9、Figure 2A2-2 2-2Dismantling of the Front Panel assembly1) The Knob Volume (pos 141) can be remove by pulling itout in the direction as shown in Figure 8.2) The Knob Bass/Knob Treble (pos 140) can be remove bypulling it out in the direction as shown in Figure 9.3) Loosen 4 screws D (see Figure 12) to

10、 remove the ShieldTape Deck and Module Tape Deck (pos 1107).4) Loosen 2 screws E (see Figure 11) to remove the BracketTop Support (pos 113).DISMANTLING INSTRUCTIONS5) Loosen 1 screw F and 4 catches C3 (see Figure 11) toremove the Eeprom Board (pos 1105D).6) Loosen 4 screws G (see Figure 11) to remov

11、e the BracketCombi (pos 155).7) Uncatch 4 catches C4 (see Figure 13) to remove theDisplay Board (pos 1105A)8) Loosen 4 screws H (see Figure 13) to remove the TopKey Board (pos 1105C).9) Loosen 5 screws J (see Figure 14) and 2 nuts W (seeFigure 10) to remove the Control Board (pos 1105B).Dismantling

12、of the Front Panel assemblyFigure 11Figure 9Figure 12 Figure 15Figure 131) Loosen 3 screws K and 2 catches C5 (see Figure 15) toremove the Tuner Board assembly.2) Loosen 3 screws L (see Figure 15) to free the CombiBoard (pos 1102-1001).3) Loosen 1 screw M (see Figure 15) to free the MainsSocket Boar

13、d (pos 1102-1002B).4) Loosen 1 scew N and 2 catches C6 (see Figure 15) tofree the Panel Rear (pos 230) by sliding it out towards therear.Note : Tuner Board assembly and Mains Socket Boardcan also be remove together with the Panel Rear.Dismantling of the Rear Panel assemblyFigure 14Figure 8Figure 102

14、-3 2-3Service position AService position BService position CDISMANTLING INSTRUCTIONSRepair Hints & Service Positions1) During repair it is possible to disconnect the Tuner Boardand/or CD Module completely unless the fault is sus-pected to be in that area. This will not affect theperformance of the r

15、est of the set.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, otherwise faultsmay occurs.3-1 3-1Variousother TestsActivated with ACTIONTESTEEPROM

16、FORMATTESTLoad default data. Display shows “NEW“ for 1 second.Caution! All presets from the customer will be lost!Disconnectmains cordLEAVE SERVICETEST PROGRAMSS9 to ExitEEPROM TEST Test patterns will be sent to the EEPROM.“PASS“ is displayed if the uProcessor read back the test patternscorrectly, o

17、therwise “FAIL“ will be displayed.Volume, Treble or BassKnobROTARYENCODER TESTDisplay shows value for 2 seconds.Values increases or decreases until Volume Maximum (0dB) orVolume Minimum (VOL MUTE) is reached.BIIDEMO TOGGLEPressing this button will toggle between DEMO ON and DEMOOFF. The DEMO status

18、will scroll once across the Display.Figure 1Figure 2LEDsECOCDTUNERTAPEAUXVolume RotaryOffOnOnOnOnOnOffOnOffOnOffOnPattern 1 Pattern 2Table 2YNYNDIM or RDSButton pressed?DIM or RDSButton pressed?DISPLAYTESTDisplay shows Figure 1and switch all LEDs onexcept ECO LED(see Table 2 Pattern 1)Display shows

19、Figure 2and switch alternate LEDs on(see Table 2 Pattern 2)YN9Button pressed?YNYNNAUXButton pressed?AUXButton pressed?AUXButton pressed?ADCTESTDisplay shows “ADC1 Value“for ADC1(Input Line - TpADC1)Display shows “ADC2 Value“for ADC2(Input Line - TpADC2)YNAUXButton pressed?Display shows “ADC3 Value“f

20、or ADC3(Input Line - Option)YYN9Button pressed?ADC Test is used for checking theADC inputs to the microprocessor.The display shows an ADC valuebetween 0 and 255 for an inputsignal between 0 and 5V.Display shows “ADC4 Value“for ADC4(Input Line - AmNtc)CD (on RC)Button pressed?YNSTEP123456DISPLAYMESSA

21、GE-BUS OK-FOC OK-BUS ER-FOC ERACTIONIndicates the module used.Version of the MPEG software (nn = Version Number).Communication test between the Main uP and CD Module.CD SLEDGE MOTOR is moved in.CD SLEDGE MOTOR is moved out.FOCUS SERVO Test.Press 9 to exit.OKAY ERRORMP3CD03TI-VnnTI BUSSLD ISLD OTI FO

22、CChooselevelby pressingon the RCQRNote : Disc should be available on the tray before entering the Service Test Mode.MP3-CD MODULETESTYYYNNNDisplay shows12MOutput at (Display Board)pin 19 of uP = 2,929.6875HzDisplay shows32KOutput at (Display Board) pin 19 of uP = 2048HzQUARTZTESTTAPEButton pressed?T

23、APEButton pressed?9Button pressed?TUNERButton pressed?DisconnectMains cord ?YYNNYDisplay Tuner Version “ccc“Service frequencies arecopied to the RAM (see Table 1)Tuner works normally except:PROGRAM buttonService Mode leftTUNERTESTTUNERButton pressed?NPRESET1234567891011Europe“EUR“87.5MHz108MHz531kHz

24、1602kHz558kHz1494kHz87.5MHz87.5MHz87.5MHz87.5MHz98MHzEast Europe“EAS“87.5MHz108MHz531kHz1602kHz558kHz1494kHz87.5MHz87.5MHz87.5MHz87.5MHz98MHzUSA“USA“87.5MHz108MHz530kHz1700kHz560kHz1500kHz98MHz87.5MHz87.5MHz87.5MHz87.5MHzOversea“OSE“87.5MHz108MHz531/530kHz*1602/1700kHz*558/560kHz*1494/1500kHz*87.5/9

25、8MHz*87.5MHz87.5MHz87.5MHz98/87.5MHz*Table 1East Eur. Extended-band“EAS“65.81MHz108MHz74MHz87.5MHz531kHz1602kHz558kHz1494kHz98MHz70.01MHz65.81MHzNote: * Depending on the selected grid frequency (9 or 10kHz).By holding the ECO and TUNER buttons depressed while switching on the Mains supply,one of the

26、 undermentioned features will be activated:- the tuning grid frequency is toggled between 9kHz and 10kHz for the Oversea (/21) version.- the extended FM1 (65.81MHz - 74MHz) is toggled on and off for East Eur. (/34) version.To start service test programhold & ECOdepressed 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 PROGRAMMicro 2004_MCM7 & MCM8_Service Test Program_dd wk0410S