Akai-ACMX110-cs-sm 电路图 维修手册.pdf

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1、AKAI SERVICE MANUAL MODEL : AC-MX110 MINI-MINI Hi-Fi COMPONENT SYSTEM SPECIFICATION GENERAL SECTION Signal to Noise Ratio : 65dB Power Consumption : 150W Total Harmonie Distortion : 0.5% Dimension : 245(W) X 193(H) x Separation(STEREO) : 30dB 235(D)nnm x 2EA Weight : 15.5kg TAPE SECTION (RECORD/PLAY

2、BACK) Power source : See the label rating RCORD/PLAYBACK Super Bass Control(IOOHz): +8dB Frequency Range(Cr02) : 40Hz 13kHz EQ Control : 8dB Signal to Noise Ratio : 48dB Output Power(D.T:lO%, at 1kHz): 25W Separation : 35dB RADIO SECTION Total Harmonie Distortion : 1.5% LW BAND Erasing Effect : 65dB

3、 Frequency Range : 153l I ) D 1. PLAY/PAUSE BUTTON 2. STOP BUTTON 3. INTRO. SCAN BUTTON 4. CD SYNCHRO BUTTON 5. DISPLAY BUTTON 6. DISPLAY 7. REPEAT BUTTON 8. SHUFFLE PLAY BUTTON 9. OPEN/CLOSE BUTTON 10. SEARCHC-M, ) BUTTON 11. SKIP( DBUTTON 12. PROGRAM/CHECK BUTTON 13. +10 NUMERIC BUTTON 14. DUBBING

4、 SPEED SELECT BUTTON Hl : HIGH SPEED DUBBING NORMAL : NORMAL SPEED DUBBING 15. RECORD PAUSE BUTTON 16. REWIND BUTTON 17. FAST FORWARD BUTTON 18. FORWARD PLAY BUTTON 19. REVERSE PLAY BUTTON 20. STOP BUTTON 21. RECORD BUTTON F.REC : FORWARD RECORD BUTTON R.REC : REVERSE RECORD BUTTON 22. RECORD MUTE B

5、UTTON 23. 1 MUSIC REPEAT BUTTON 24. STOP BUTTON 25. FORWARD PLAY BUTTON 26. REVERSE PLAY BUTTON 27. REWIND BUTTON 28. FAST FORWARD BUTTON 29. AUTO REVERSE BUTTON 30. LONG PLAY BUTTON 31. DOLBY NR ON/OFF SWITCH 32. A/B DECK PUSH EJECT BUTTON 33. SIGNAL OUTPUT JACK 34. DC POWER INPUT JACK - 5 - 3. REM

6、OTE CONTROL INFRARED BEAM TRANSMIT WINDOW POWER ON/OFF BUTTON- AMP SECTION PHONO BUTTON TUNER BUTTON TAPE BUTTON CD BUTTON AUX BUTTON MUTE BUTTON VOLUME DOWN p i /UP + BUTTON A DECK SECTION TUNER SECTION TUNING UP A/DOWN V BUTTON PRESET UPzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA(A)/DOWN(

7、V) BUTTON BAND SELECT BUTTON SLEEP BUTTON 1 - 1 O O O 1 + O Q 0 p O 1 1 m CD 1- ix LaJ 1 1 ! ! liJ 1 O 1 1 ! E S m iii STOP(B)BUTTON REWIND(-4)BUTTON PLAY(- L REC, DUBBING 2 DUB 0 Dubbing ; H O 3 H/SP O Hi-speed dubbing : L NOR SPEED Hl SPEED 4 A play 0 A deck play ; H O 5 CLK 1 0 Remote control ope

8、ration port 6 Data 1 0 Remote control operation port 7 CE O Remote control operation port power on power off 8 Power off Power on ; H, Power off ; L 9 - 1 1 T, SENS FF/REW play A deck operation input port A DECK OPERATION 1 2 - 1 6 F, REC/R, REC. T.SENS FF/REW.PLAY B deck operation input port B DECK

9、 OPERATION 1 7 - 1 8 TSP, TSR(OPTION) Timer sw play : B deck play Timer sw ree : B dcek REC. P U Y REC 19 REC mute 0 Rec-mute signal output REC HUTE ON REC MUTE OFF 20 Line mute 0 Line-mute signal output LINE MUTE ON LINE MUTE OFF 21 Repeat 0 1 music repeat indicator operation output 22 Ree mute 0 R

10、ee mute indicator operation output 2324 NOR/SPEED(option) O Nor-speed indicator operation output LED OPTION HI/SPEED(option) O Hi-speed indicator operation output LED OPTION 25 PIAo O A deck playback plunger operation port PLY REC 26 P2Ao 0 A deck FF/REW plunger operation port FF/REW 27 PIBo 0 B dec

11、k playback plunger operation port PLAY REC 28 P2Bo 0 B deck FF/REW plunger operation port FF/REW 29 INH 1 0 Led control port 3 0 - 3 1 Test, Vss GND 3 2 - 3 3 osei, 0SC2 4 MHz OSC port 34 RES Reset 3 5 - 3 7 CE, CLK, Data Led control 3 8 - 4 5 REW, FF, R play, F Play(B deck) REW, FF, R play, F Play

12、(A deck) 0 B deck operation display : output port(option) A deck operation display : output port(option) - 9 - (TAPE MICOM : IC605 INPUT O U T P U T ACTIVE PIN No. PIN NAME OPERATION PIN No. PIN NAME 1 0 OPERATION H L 46-54, 56 Key matrix 1 Key matrix input 55 Amps in 1 Amps blank signal input H 57

13、Quick reverse B 1 B deck leader signal input 58 Quick reverse A 1 A deck leader signal input 59 Auto stop B 1 B deck autostop signal input 60 Auto stop A 1 A deck autostop signal input 61 MAO 0 A deck motor operation signal output MOTOR OPERATION 62 MBO 0 B deck motor operation signal output MOTOR O

14、PERATION 63 Amps out 0 Amps operation signal output 64 VDD VDD 2. TUNER SECTION LC7230-8302 (MICOM IC) : C901 1 : INPUT, 0 : OUTPUT PIN No. PIN NAME INPUT O U T P U T OPERATION ACTIVE PIN No. PIN NAME 1 0 OPERATION ACTIVE 1 1 Crystal oscillating port.(4.5MHz) 2 X a u l O Crystal oscillating port.(4.

15、5MHz) 2, 79 TEST 1,2 1 Connect to GND 3 REMOCON 1 Remote control input port, if it is open, if may l cause Remote control to maloperate. 4 STEREO 1 Not in use. L 7 CE2 0 Not in use. L 8-10 FM,MW,LW,SW 0 Band power convert port. L GD remote control signal port. 11 VR UP O If volume up signals are inp

16、ut, it outputs higfi voltage. H 12 VR DOWN 0 If volume down signals are input, it outputs high voltage. H 13 MO/ST O Mono stereo selection port. H 14 MUTE 0 Mute output port. H 1 5 - 1 7 CE,DO,CLK 0 LG7821 control port(serial data line) H, - T 18 IF CNT 0 Not in use H 19 NARROW O Not in use H 20 POW

17、ER OUT O Power control port. H 21 A MUTE O Audio mute port. L 22 STB 0 DATA STROBO port of LG74HG375. H 2 3 - 2 6 T7-T4 O Transmit data to LG74HG375(TAPE, TUNER, H AUX, PHONO) 2 7 - 3 0 T3-T0 O Key scan output signal. H 3 2 - 3 5 K 3 - K 0 1 Key input signal. H 5 - 6 K5, K4 1 Diode matrix input sign

18、al. H 6 3 - 3 6 SI -S28 O LGD Segment drive port. 65, 64 GOM 1,2 O LGD Gommon drive port. 67 HOLD 1 L-Back up mode. L 69 SD 1 Broadcast receiving port. L 70 HGTR 1 FM IF Signal input port. - 71 LCTR 1 AM IF Signal input port. -10- (TUNER MICOM : IC901 PIN No. PIN NAME INPUT OUTPUT OPERATION ACTIVE P

19、IN No. PIN NAME 1 0 OPERATION ACTIVE 72 SNS 1 Transmit data LC7821, 74HC375 H 74, 75 FM IN, AM IN 1 Input local OSC signal. - 77, 78 EQ1, 2 O Phase comparison output signal. 66 INT 1 Remote control input port. 31, 73 VDD 76 VSS 1 68 RES 1 3. CD SECTION 1) CXD 1167Q (DSP IC) : IC3 I : INPUT, O : OUTP

20、UT PIN No. PIN NAME 1 O OPERATION 1 FSW 0 Pin 1 output is switched constant when the output filter of the spindle motor is energized. 2 MON 0 ON/OFF control for spindle motor. 3 MDP O Spindle motor drive. Provides rough control during GLV-S mode and phase control during CLV-P mode. 4 MDS O Spindle m

21、otor drive. Controls speed during CLV-P mode. 5 EFM 1 EFM Signal from RF amplifier. 6 ASY O Controls slice level of EFM signal. 7 LOCK 0 The output of pin 7 reflects the status of the GFS signal which is sampled at WFCK/16. When GFS signal is at H, the output of pin 7 also at H, but when the signal

22、has remained at L for at least 8 samples, the output of pin 7 is at L. 8 VCOO 0 When VCO locks to EFM signal, the frequency becomes 8.6436MHz MHz.( 17.2872MHz during doubl speed playback) 9 VCOl 1 VCO input. 10 TEST 1 (OV) 11 PDO O The output of Pin 11 provides the phase comparison of EFM signal and

23、 VCO/2. 12 Vss GND(OV) 13 CLK 1 Pin 13 provides the serial transmission clock from the CPU. Data is latched on the rising edge of the clock. 14 XLT 1 Pin 14 provides latch input from the CPU. 8-bit shift register data (serial data received from the CPU) is latched in each of the registers. 15 DATA 1

24、 Serial data from the CPU. 16 XRST 1 System reset input. Reset at L 17 CNIN 1 Tracking pulse input. 18 SENS 0 Output reflecting internal condition as designated by address. 19 MUTG 1 Muting input. MUTG is at L when ATTM of internal register A is at L (normal condition). MUTG is at H when muting cond

25、ition is set. 20 CRCF O Ouput the results of subcode 0 CRC check. 21 EXCK 1 Clock input for subcode serial output. 22 SBSO O serial output of subcod. 23 SUBQ O Output of subcode 0. 24 SCOR 0 Output of subcode sync S 0 + S I 25 SOCK 1 O Clock for reading subcode Q. 26 SQEX 1 Input for selecting SQCK.

26、(See CPU interface paragraph) 27 DOTX 0 Digital output (WFCK is output when DO is off) 28 GFS 0 Indicates the frame sync lock status. 29 TEST 1 H or L is fixed. (Do not open.) 30 TEST 1 H or L is fixed. (Do not open.) 31 TEST 1 H or L is fixed. (Do not open.) 32 TEST 1 H or L is fixed. (Do not open.

27、) - 1 1 - LA 2000 (AMPS SENSOR) : IC604 LA2000LA2010 BA10324(OP AMP) : IC301, 302 BA10324-LM324/LA6324 BA 1 0 3 2 4 RESET RESET CCMI HOLDING O LA 2000 (AM SENSOR) : IC 604 I U J L.J U U L,J L J U U U li BA 4558 (OP AMP) : IC 103, 105, IC 7, 8 * BA 4558MC 4558C 0UT1 1 INIHzyxwvutsrqponmlkjihgfedcbaZY

28、XWVUTSRQPONMLKJIHGFEDCBA 2 VEE 4 f - vcc 7 0UT2 6 I IN2H 5 IN2(-) -GNO OUTI -IN I + 1 N i VCE + IN 1 -IN -2k 1 0UT2 OUT 4 iij -IN ii -t-IN VCC i) tIN U-IN 80UT3 STK 4142V (POWER IC) : IC 801-1, 2 k ih H F-3630V (FRONT END IC) : IC 101 FET l TRI 71 PIN No. PIN N AM E 1 0 OPERATION 33 34 50 51 VOD Pow

29、er supply ( + 5V) 33 34 50 51 TEST 1 H or L is fixed. (Do not open.) 33 34 50 51 C4M O Divider output for crystal. f=4.2336MHz (8.4672MHz at doubl speed playback.) 52 Vss GND(OV) 53 XTAI 1 Input to crystal oscillator circuit. Depending on the mode the frequency is either f=8.4672 or 16.9344MHz. (16.

30、9344MHz at doubl speed playback.) 54 XTAO O Output trom crystal oscillator circuit. Depending on the mode the frequency is either f=8.4672 16.9344MHz (16.9344MHz at doubl speed playback.) 55 MD1 1 Mode selection input 1. 56 MD2 1 Mode selection input 2. 57 MD3 1 Mode selection input 3. 58 SLOB 1 Cod

31、e switch input for audio data output. 2s complement output when at L, offset binary output when at H . 59 PSSL 1 Mode switch input for audio data output. Serial output when at L, parallel output when at H . 60 APTR 0 Control output for aperture compensation at H during R-ch. 61 APTL 0 Control output

32、 for aperture compensation at H during L-ch. 62 DA01 0 DA01(LSB of parallel audio data) is output when PSSL=at H . C1F1 is output when PSSL=at L 63 DA02 O DA02 is output when PSSL=at H . C,F2 is output when PSSL=at L . 64 DA03 0 DA03 is output when PSSL=at H . C2F1 is output when PSSL=at L. 65 DA04

33、0 DA04 is output when PSSL=at H . C2F2 is output when PSSL=at L. 66 DA05 O DA05 is output when PSSL=at H . C2FL is output when PSSL=at L. 67 DA06 0 DA06 is output when PSSL=at H . CjFo is output when PSSL=at L. 68 DA07 0 DA07 is output when PSSL=at HL. RFCK is output when PSSL=at L. 69 DA08 O DA08 i

34、s output when PSSL=at H . WFCK is output when PSSL=at L. 70 DA09 0 DA09 is output when PSSL=at H . PLCK is output when PSSL=at L. 71 DA10 O DA10 is output when PSSL=at H . UGFS is output when PSSL=at L. 72 DA11 O DA11 is output when PSSL=at H . GTOP is output when PSSL=at L. 73 VDD Power supply ( +

35、5V) 74 DA12 0 DA12 is output when PSSL=at H . RAOV is output when PSSL=at L 75 DA13 O DA13 is output when PSSL=at H . C4LR is output when PSSL=at L. 76 D A M O D A M is output when PSSL=at H . BCLK is output when PSSL=at L. 77 DA15 O DA15 is output when PSSL=at H . BCLK is output when PSSL=at L. 78

36、DA16 O DA16(MSB of parallel audio data) is output when PSSL=at H . DATA is output when PSSL=at L. 79 WDCK 0 Strobe signal output. Output is 176.4KHz when DF is on. (352.8kHz at doubl speed playback) Output is 88.2kHz when DF is off.( 176.4kHz at doubl speed playback). 80 LRCK 0 Strobe signal output.

37、 Output is 88.2KHz when DF is on. (176.4kHz at doubl speed playback) Output is 44.1kHz when DF is off.(88.2kHz at doubl speed playback). Monitor output reporting status of error correction for C l decoder. Monitor output reporting status of error correction for C2 decoder. Output of correction statu

38、s. C2FL is set to H when the C2 sequence presently being corrected beco- mes impossible to correct. Display output of the C2 pointer. It is synchronized with the audio data output. Read frame clock output. 7.35kHz of the crystal system. (14.7kHz at doubl speed playback) N ote ) C1F1 : C l F 2 : . C2

39、F1 : C2F2 : . C2FL : C 2 P 0 : RFCK : - 1 2 - WFCK : Write frame clock output. 7.35kHz when locked by the crystal system. (14.7kHz at doubl speed play- back) PLCK : Output VC0/2.f=4.3218MHz when locked by the EFM signal.(8.6436MHz at doubl speed playback) UGFS : Output for unprotected frame sync pat

40、terns. GTOP : Output for display of status of frame sync protection. RAOV : Ooutpur for display of either RAM overflow or underflow for 4 frame jitter absorption. C4LR : Strobe signal. 352.8kHz(705.6kHz at doubl speed playback) when DF is on, 176.4kHz (352.8kHz at doubl speed playback) when DF is of

41、f. BCLK : Inverse output of bit clock. BCLK : Bit clock. 4.2336MHz(8.4672MHz at doubl speed playback) when DF is on, 2.1168MHz(4.2336MHz at doubl speed playback) when DF is off. DATA : Serial data output of audio signal. 2 ) KS 5 6 C 8 2 0 ( C D M IC O M IC) : IC4 PIN N o. PIN N AM E O PERATIO N 1 X

42、LT DATA latch signal output of DSP Check soldering and connection of CNFT. (2) If FUNCTION LED is werking but signal is not converted; Check signal output at pin 15, 16, 17 of LC7230. LC7821 CE, DO, CLK LC7821 wont operate untii power supply reaches 5V. (3) If CD synchro is inoperative or deck CDP r

43、emote control is inoperative Check signal output LC7230 pin 7, 16, 17. pin 7 : low actlve i 5vt pin 16, 17 : high actlve i 2. TAPE SECTION 1) DECK PROBLEM 2) HIGH SPEED PROBLEM CHECK POWER (1) Check power jack. (2) Check voltage of CNT 604. Check CNT504 pin 3. MOTOR +12V CHECK i-COM RESET (IC605) VD

44、D (pin 64) 5 V - / / R g C p i n 34) CHECK n-COM 12.6KHZ for AZIMUTH adjustment). 11) MTT-150 (or equivalent; tape (200nwb/m) recorded by dolbylevel 3) Dobly NR sw off 4) Connection of measuring equipments (figure 2). DECK A PLAYBACK DOLBY LEVEL ADJUSTMENT SET VTVM OSCILLOSCOPE TP602zyxwvutsrqponmlk

45、jihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA O. GND O FORWARD, PLAYzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA y PLAY AZIMUTH ADJUSTMENT SCREW STEP ITEM C O N N E C T I O N PREPARATION AD JU S T M E N T POINT RESULT TP3-B ( - ) terminal;TP3-A Cl) Connect TP2-B to TP2-A. (4) Adjust VR5 so the freque

46、ncy counter reads 8.658.67MHz. (Adjust in stop mode) (5) Disconnect TP2-B from TP2-A. VCO adjustment point (2) FOCUS OFFSET ADJUSTMENT Ci) Turn power on and load a disc. ( 2) Oscilloscope setting and connection ( + )terminal;TP1-A ( - ) terminal;TP1-B Adjust VR2 so the waveform is as shown in pictur

47、e. (Adjust in stop mode) FOCUS OFFSET VOLT/DIV;10mV TIME/DIV;0.5zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA|iS (3) FOCUS (FE) GAIN ADJUSTMENT (D Turn power on and load a disc. Press play. (3) Oscilloscope setting and connection (VR2) FOCUS(FE) GAIN VOLT/DIV;10mV TIME/DIV;2mS ( + )terminal;T

48、P1-A ( - ) terminal;TP1-B Adjust VR4 so the peak to peak waveform is as shown in the picture. (4) E-F BALANCE ADJUSTMENT Turn power on and load a disc. ( 2) Press play. (3) Connect D and B. (TP1). Oscilloscope setting and connection VOLT/DIV;0.5V ( + ) terminal;TP1 -C TIME/DIV;1 OmS j ( - ) terminal;TP1 -B Adjust VR1 so the waveform is as shown in the picture. Disconnect D from B. (5) TRACKIN