Philips-MC-235-Service-Manual(1) 电路图 维修手册.pdf

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1、GB CLASS 1 LASER PRODUCT COMPACT DIGITAL AUDIO Service Manual Service ServiceService ServiceService MC230/21M/22/25/30 TABLE OF CONTENTS Page Location of pc boards fr Reparaturen sind Original-Ersatzteile zu verwenden. Sicherheitsbauteile sind durch das Symbol ! markiert. I Le norme di sicurezza esi

2、gono che lapparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambio identici a quelli specificati. Componenty di sicurezza sono marcati con ! GB After servicing and before returning set to customer perform a leakage current measurement test from all exposed meta

3、l parts to earth ground to assure no shock hazard exist. The leakage current must not exceed 0.5mA. PREPARATIONS AND CONTROLS 1-7 Preparations Rear connections The type plate is located at the rear of the system. APower Before connecting the AC power cord to the wall outlet, ensure that all other co

4、nnections have been made. If your system is equipped with a Voltage Selector, set the VOLTAGE SELECTOR to the local power line voltage. WARNING! For optimal performance, use only the original power cable. Never make or change any connections with the power switched on. To avoid overheating of the sy

5、stem, a safety circuit has been built in. Therefore, your system may switch to Standby mode automatically under extreme conditions. If this happens, let the system cool down before reusing it (not available for all versions). BAntennas Connection Connect the supplied MW loop antenna and FM antenna t

6、o the respective terminals. Adjust the position of the antenna for optimal reception. MW Antenna Position the antenna as far as possible from a TV, VCR or other radiation source. MW loop antenna FM wire antenna AC power cord Speakers (right) Speakers (left) NOT FOR ALL VERSIONS VOLTAGE SELECTOR 110V

7、- 127V 220V- 240V FM Antenna For better FM stereo reception, connect an outdoor FM antenna to the FM AERIAL (FM ANTENNA) terminal. CSpeakers Connection Front Speakers Connect the speaker wires to the SPEAKERS terminals, right speaker to RIGHT and left speaker to LEFT, colored (marked) wire to + and

8、black (unmarked) wire to -. Fully insert the stripped portion of the speaker wire into the terminal as shown. Notes: For optimal sound performance, use the supplied speakers. Do not connect more than one speaker to any one pair of +/- speaker terminals. Do not connect speakers with an impedance lowe

9、r than the speakers supplied. Please refer to the SPECIFICATIONS section of this manual. Optional connection The optional equipment and connecting cords are not supplied. Refer to the operating instructions of the connected equipment for details. Connecting other equipment to your system Connect the

10、 audio left and right OUT terminals of a TV, VCR, Laser Disc player, DVD player or CD Recorder to the AUX-IN terminals. Note: If you are connecting equipment with a mono output (a single audio out terminal), connect it to the AUX left terminal. Alternatively, you can use a “single to double” cinch c

11、able (the output sound still remain mono). Before using the remote control 1Pull out the plastic protective sheet. 2Select the source you wish to control by pressing one of the source select keys on the remote control (for example CD, TUNER). 3Then select the desired function (for example , ,). plas

12、tic protective sheet Replacing battery (lithium CR2025) into the remote control 1Pull out the knob A slightly to the left. 2Pull out the battery compartment B . 3Replace a new battery and fully insert the battery compartment back to the original position. CAUTION! Batteries contain chemical substanc

13、es, so they should be disposed off properly. Preparations PREPARATIONS AND CONTROLS 1-8 ) 1 3 4 6 7 8 9 5 ! 0 2 1 ! 7 0 8 * % 3 # $ & ( 5 Controls Controls on the system and remote control 1STANDBY-ON/ ECO POWER switches the system on or to Eco Power standby. 2Display shows the status of the system.

14、 3OPEN CLOSE opens/ closes the CD door. 4IR remote sensor 5VOLUME (3 / 4 ) (+/-) adjusts the volume level. 6CD Door 7Mode Selection SEARCH/ TUNE ( / ) for TUNER .tunes to a station for CD .fast searches back and forward within a track/ CD. STOP 9.stops CD playback or erase a CD programme. PLAY .star

15、ts or interrupts playback. PRESET ( / ) for TUNER .selects a preset radio station. for CD .skips to the beginning of a current track/ previous/ subsequent track 8DBB (Dynamic Bass Boost) enhances the bass. 9BAND selects a waveband. 0PROGRAM for CD .programmes tracks and reviews the programme. for TU

16、NER .programmes tuner stations. !SOURCE selects the respective sound source for CD/ TUNER/ AUX. CLOCK SET sets the clock function. views the clock. #TIMER activates/ deactivates or sets the timer function $SLEEP activates/deactivates or selects the sleeper time. %DSC (Digital Sound Control) selects

17、sound characteristics: ROCK/ JAZZ/ POP/ CLASSIC. Notes for remote control: First select the source you wish to control by pressing one of the source select keys on the remote control (for example CD, TUNER). Then select the desired function (for example , , ). RDS.NEWS activates RDS news and Traffic

18、 Announcement. for tuner, displays RDS information. &MUTE interrupts and resumes sound reproduction. *REPEAT repeats a track/ CD programme/ entire CD. (SHUFFLE plays CD tracks in random order. ) connects headphones PREPARATIONS AND CONTROLS 1-9 Important notes for users in the U.K. Mains plug This a

19、pparatus is fitted with an approved 13 Amp plug. To change a fuse in this type of plug proceed as follows: 1Remove fuse cover and fuse. 2Fix new fuse which should be a BS1362 5 Amp, A.S.T.A. or BSI approved type. 3Refit the fuse cover. If the fitted plug is not suitable for your socket outlets, it s

20、hould be cut off and an appropriate plug fitted in its place. If the mains plug contains a fuse, this should have a value of 5 Amp. If a plug without a fuse is used, the fuse at the distribution board should not be greater than 5 Amp. Note: The severed plug must be disposed of to avoid a possible sh

21、ock hazard should it be inserted into a 13 Amp socket elsewhere. How to connect a plug The wires in the mains lead are coloured with the following code: blue = neutral (N), brown = live (L). As these colours may not correspond with the colour markings identifying the terminals in your plug, proceed

22、as follows: Connect the blue wire to the terminal marked N or coloured black. Connect the brown wire to the terminal marked L or coloured red. Do not connect either wire to the earth terminal in the plug, marked E (or e) or coloured green (or green and yellow). Before replacing the plug cover, make

23、certain that the cord grip is clamped over the sheath of the lead - not simply over the two wires. Copyright in the U.K. Recording and playback of material may require consent. See Copyright Act 1956 and The Performers Protection Acts 1958 to 1972. Norge Typeskilt finnes p apparatens underside. Obse

24、rver: Nettbryteren er sekundert innkoplet. Den innebygde netdelen er derfor ikke frakoplet nettet s lenge apparatet er tilsluttet nettkontakten. For redusere faren for brann eller elektrisk stt, skal apparatet ikke utsettes for regn eller fuktighet. Italia DICHIARAZIONE DI CONFORMITA Si dichiara che

25、 lapparecchio MC230, MC235 Philips risponde alle prescrizioni dellart. 2 comma 1 del D.M. 28 Agosto 1995 n. 548. Fatto a Eindhoven Philips Consumer Electronics Philips, Glaslaan 2 5616 JB Eindhoven, The Netherlands CAUTION Use of controls or adjustments or performance of procedures other than herein

26、 may result in hazardous radiation exposure or other unsafe operation. VAROITUS Muiden kuin tss esitettyjen toimintojen sdn tai asetusten muutto saattaa altistaa vaaralliselle steilylle tai muille vaarallisille toiminnoille. 1-10 PREPARATIONS AND CONTROLS WARNING Under no circumstances should you tr

27、y to repair the system yourself, as this will invalidate the warranty. Do not open the system as there is a risk of electric shock. If a fault occurs, first check the points listed below before taking the system for repair. If you are unable to remedy a problem by following these hints, consult your

28、 dealer or Philips for help. ProblemSolution CD OPERATION “NO DISC” is displayed.Insert a disc. Check if the disc is inserted upside down. Wait until the moisture condensation at the lens has cleared. Replace or clean the disc, see “Maintenance”. Use a finalised CD-RW or CD-R. RADIO RECEPTION Radio

29、reception is poor.If the signal is too weak, adjust the antenna or connect an external antenna for better reception. Increase the distance between the Micro HiFi System and your TV or VCR. GENERAL The system does not react when buttonsRemove and reconnect the AC power plug and are pressed.switch on

30、the system again. Sound cannot be heard or is of poorAdjust the volume. quality.Disconnect the headphones. Check that the speakers are connected correctly. Check if the stripped speaker wire is clamped. The left and right sound outputs areCheck the speaker connections and location. reversed. The rem

31、ote control does not functionSelect the source (CD or TUNER, for example) properly.before pressing the function button ( , ). Reduce the distance between the remote control and the system. Insert the battery with its polarities (+/ signs) aligned as indicated. Replace the battery. Point the remote c

32、ontrol directly toward IR sensor on the front of the system. The timer is not working.Set the clock correctly. Press TIMER to switch on the timer. The Clock/Timer setting is erased.Power has been interrupted or the power cord has been disconnected. Reset the clock/timer. Troubleshooting DISMANTLING

33、INSTRUCTIONS Dismantling of the Rear Portion 1) Remove 11 screws A and B as indicated to remove the Rear Cabinet. 2) Remove 2 screws C as indicated to loosen the Speaker Wire Holder. 3) Remove 2 screws D as indicated to loosen the Speaker Board . 4) Remove 2 screws E as indicated to loosen the AUX I

34、N jack. DISMANTLING INSTRUCTIONS 2-12-1 Figure 1 Figure 2 1) Loosen 3 screws G each to remove the CD Mechanism Holder Bracket. 2) Loosen 7 screws F1 and F2 as indicated to remove the Main Board. 3) Remove 3 screws H as indicated to loosen the Gear Motor Module. 4) Loosen 4 screws I (see Figure 3) to

35、 remove the Key_C Board. 5) Loosen 2 screws J (see Figure 3) to remove the Display Board. Figure 6 Figure 4 Figure 3 Dismantling of the Front Boards and CD Door 6) Loosen 4 screws K (see Figure 3) to remove the Key_B Board. 7) Loosen 8 screws L (see Figure 3) to remove the Key_A Board. 8) Loosen 8 s

36、crews M (see Figure 3) to remove the Door Eject Lever Bracket Right/Left, then remove CD door. Repair Hints & Service Positions Note: The flex cables are very fragile, care should be taken not to damage them during repair. After repair, be very sure that the flex cables are inserted properly into th

37、e flex sockets before encasing, otherwise faults may occurs. Service position A Service position C Service position B Figure 5 3-13-1 SERVICE TEST PROGRAM Y N Y N PROGRAM Button pressed? PROGRAM Button pressed? ERASE THE? EEPROM Display shows EP CLR COMPACT DISC? TEST KEY NEXT PREV STOP PLAY DISPLAY

38、 MESSAGE - - - - - ? - - - - ACTION Disc motor turns clockwise, motor power 50%. Disc motor turns counter clockwise, motor power 50% Slide moves outside. Slide moves inside. Exit to main menu. Enter focus servo test. OKAYERROR MOTOR 1 MOTOR 2 SLE OUT SLE IN FOCUS Note : Disc should be available on t

39、he tray before entering the Service Test Mode. VOLUME+ Button pressed? Button pressed? Y N N Y Display shows Key KEY TEST Any Button pressed? N Main Set Key STANDBY-ON OPEN*CLOSE SOURCE- DBB BAND PROGRAM DISPLAY 32 29 11 17 10 14 18 19 20 24 23 Table 1 Y N Y N Y N VOLUME- Button pressed? VOLUME- But

40、ton pressed? STOP? Button pressed? DISPLAY TEST Display shows all display ? segments and switch all? LEDs on. Display shows alternate ? display segments & switch? alternate LEDs on. To start service test program PLAY & SOURCE depressed while plugging in the mains cord Display shows the ROM version V

41、ER XXX (Main menu) VER refers to Version XXX refers to Software version number of the uProcessor (counting up from 010 to 999) PLAY? ? VOLUME+ VOLUME- PREVIOUS( ) NEXT () The corresponding codes ? according to Table 1 will be ? displayed STOP 12 13 - - - R-C Key POWER CD TUNER AUX OPEN*CLOSE DBB DIS

42、PLAY 12 63 63 63 45 70 52 50 33 32 VER XXX VOL+ VOL- PREVIOUS( ) NEXT ( ) 42 38 PROG REPEAT SHUFFLE PLAY STOP CLOCK SET TIMER SLEEP 89 MUTE RDS * NEWS 15 13 17 16 53 26 29 36 REMOTE CONTROL? KEY TEST Note : In Key test mode, if a key on the remote control is pressed,? the display shows its correspon

43、ding code in track area. Exit to main menu REMARK 4-14-1 SET BLOCK DIAGRAM ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 5-1 5

44、-1 SET WIRING DIAGRAM POWER BOARD TABLE OF CONTENTS Circuit Diagram .6-2 PCB Layout .6-3 6-1 6-1 6-2 6-2 CIRCUIT DIAGRAM 6-3 6-3 LAYOUT DIAGRAM - POWER BOARD COMPONENT SIDE LAYOUT DIAGRAM - POWER BOARD SMD SIDE 7-1 KEY BOARD TABLE OF CONTENTS Circuit Diagram.8-2 Layout Diagram-Component .8-3 Layout

45、Diagram-SMD . 8-3 Layout Diagram-Component .8-4 Layout Diagram-SMD . 8-4 7-1 CIRCUIT DIAGRAM - FRONT BOARD 7-27-2 LAYOUT DIAGRAM - KEY_A BOARD COMPONENT SIDE 7-37-3 LAYOUT DIAGRAM - KEY_B BOARD COMPONENT SIDE LAYOUT DIAGRAM - KEY_A BOARD SMD SIDE LAYOUT DIAGRAM - KEY_B BOARD SMD SIDE 7-47-4 LAYOUT DIAGRAM - KEY_C BOARD COMPONENT SIDE LAYOUT DIAGRAM - KEY_C BOARD SMD SIDE 8-1 MAIN BOARD TABLE OF CONTENTS IC Block Diagram.8-1 Circuit Diagram-Main Part . 8-2 Component Layout - Main PCB . 8-3 SMD Layout - Main PCB . 8-4 Layout - Headphone PCB .8-5 IC Block Diagram.