Aiwa-AMF90-md-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL DATA BASIC MD MECHANISM : MT-MZR900-171MINIDISC RECORDER AM-F90 S/M Code No. 09-01A-355-4N2 AHK1 (S) RadioFans.CN 收音机爱 好者资料库 -2- TABLE OF CONTENTS SPECIFICATIONS . 3 ACCESSORIES/PACKAGE LIST-1/1 . 4 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING . 5 Optical Pickup Block and Base

2、Unit Handling Precautions. 6 Service Note. 7 DISASSEMBLY INSTRUCTIONS. 8-13 ELECTRICAL MAIN PARTS LIST . 14-17 BLOCK DIAGRAM-1/3 (SERVO) . 18 BLOCK DIAGRAM-2/3 (AUDIO) . 19 BLOCK DIAGRAM-3/3 (DISPLAY/KEY CONTROL/POWER) . 20 WIRING-1/1. 21 SCHEMATIC DIAGRAM-1/1 . 22 WAVE FORM . 23-25 TEST MODE . 26-3

3、1 ELECTRICAL ADJUSTMENT. 32-42 IC BLOCK DIAGRAM. 43-45 IC DESCRIPTION-1/2 (CXA1782BQ)-1/1. 46 IC DESCRIPTION-2/2 (CXD2671-203GACXD2671-203 GA) . 47-52 MECHANICAL EXPLODED VIEW-1/3 (MAIN UNIT) . 53 MECHANICAL EXPLODED VIEW-2/3 (MAIN C.B BLOCK) . 54 MECHANICAL EXPLODED VIEW-3/3 (MD MECHANISM DECK). 55

4、 MECHANICAL PARTS LIST-1/1. 56, 57 APPENDIX1/1 . 58 RadioFans.CN 收音机爱 好者资料库 -3- SPECIFICATIONS Design and specifications are subject to change without notice. Dolby noise reduction and HX Pro headroom extension manufactured under license from Dolby Laboratories Licensing Corporation. HX Pro originat

5、ed by Bang ” “;” Operations in the Test Mode When the machine enters the test mode, the machine enters further the display check mode of the test mode. You can move to the other mode from the display check mode. When the machine enters the test mode, the LCD of the remote control repeats showing the

6、 following displays. Display on remote control LCD All elements turn off. All elements turn on. Microprocessor version display While the “;” key is kept pressed, the display at the moment is also kept appearing on the LCD that enables you to check the display. Note: The sets that use the microproces

7、sor version 1.000 are adjusted of their setup data by the MANUAL mode in the factory before shipment. If the NV reset is executed in these sets, the setup data will be cleared. If the NV reset is executed in the sets of version 1.000, change the adjustment value in accordance with the adjustment val

8、ue change procedure immediately after the NV reset is executed. (Refer to ELECTRICAL ADJUSTMENT on page 32.) How to Exit the Test Mode When the machine has entered the test mode by using the method 1 of the How to Enter the Test Mode : Turn off the power and open the solder bridge of SL801 (TEST) MA

9、IN C.B. Note: Remove the soldering completely with care. If any solder remains, it may cause short-circuit with the chassis. When the machine has entered the test mode by using the method 2 of the How to Enter the Test Mode : Turn off the power. Note: If all of the electrical adjustment items (CD AU

10、TO Adj/MO AUTO Adj. ) are not finished yet, the machine starts up in the test mode when the power is turned on next time. (The machine will not start up in the normal mode.) -27- TEST MODE-2/6 Configuration of the Test Mode Test mode (Display check mode). Press the or key. MANUAL Mode. Press the key

11、. Servo Adjustment Audio Adjustment Power Supply Adjustment OP Alignment Adjustment AUTO Adj. Mode Press the key. Press the key. Press the key. Electrical Offset Adjustment Automatic Advance of Power Supply Adjustment Items CD/MO AUTO Adj. Press the JOG lever (left) (top) key or the key of remote co

12、ntrol. Self-Diagnosis Result Display Mode Press the or the key. Sound Skip Check Result Display Mode Press the key or the key of remote control for several seconds (about 3 seconds) Key Check Mode The key check ends or the PANEL, TOP is opened. Press the or key. Selecting the main category (the left

13、most number in the hundreds place) of the test item. Selecting the middle category (the center number in the tens place) of the test item. Selecting the minor category (the rightmost number in the ones place) of the test item. key : The item number in the hundreds place increases. key key key key ke

14、y key key key : The item number in the hundreds place decreases. key : The item number in the tens place increases. key : The item number in the tens place decreases. To change the adjustment value key : The adjustment value increases. key : The adjustment value decreases. To write the adjustment va

15、lue When the adjustment value is changed : The adjustment value is written. When the adjustment value is not changed : The automatic adjustment of the item is performed. MANUAL Mode. In the MANUAL Mode, movement of the machine is separated by functions so that adjustment and operation check can be p

16、erformed in each movement. However, do not perform any adjustment using the MANUAL Mode ordinarily. Note that Clearing memory, Power supply voltage adjustment and Laser power check are performed using the MANUAL Mode before entering the O/A Adj. (Overall Adjustment) How to Enter the MANUAL Mode 1.En

17、ter the test mode. (Refer to TEST MODE ELECTRICAL ADJUSTMENT on page 26.) 2.When the “” or the “VOL +” key is pressed, the machine enters the MANUAL Mode and the following display appears on the LCD. Display on remote control LCD 3.When either the “2” key or the “” key is kept pressed for several se

18、conds during the test, the optical pickup moves toward outer circumference or inner circumference as long as the button is kept pressed. 4.Each test item is assigned of its unique item number consisting of three digits. The leftmost number (in the hundreds place) indicates the main category of the t

19、est item. The number in the center (in the tens place) indicates the middle category of the test item. The rightmost number (in the ones place) indicates the minor category of the test item. The adjustment values that are obtained as the result of the test mode are written in the non-volatile memory

20、 (Only for the test modes that have adjustment.) -28- However in the Power Supply Mode (Item number: 700 series), only the item title display advances to the next display. 6.To exit the MANUAL Mode and to return to the test mode (display check mode), press the “9” key. AUTO Adj. Mode In the AUTO Adj

21、. Mode , all adjustment items of the all servo systems are automatically performed. Usually, enter the AUTO Adj. Mode during repair work to perform the automatic adjustment. For details, refer to ELECTRICAL ADJUSTMENT on page 35. Error display code. Error log code. Accumulative recording hours when

22、an error occurs : Error code : Accumulative recording hours Self-Diagnosis Result Display Mode This machine contains the Self-Diagnosis Result Display Mode. If an error occurs during recording or playback, the mechanism control block of the microprocessor and the power supply control block detect th

23、e error status. Cause of the error is stored in the non-volatile memory as an error log. The error log is useful to locate the cause of the error in the test mode. The accumulative recording hours are stored as a guideline indicating how many hours the optical pickup has been used. The accumulative

24、recording hours are useful to know when an error occurs by comparing the present accumulative recording hours with what are shown at the time of error occurrence in the Self-Diagnosis Result Display Mode. When an optical pickup is replaced, be sure to clear both of the accumulative recording hours s

25、tored in the Self-Diagnosis Result Display Mode and the accumulative recording hours of optical pickup. How to Enter the Self-Diagnosis Result Display Mode 1.Enter the test mode. (Refer to TEST MODE on page 26.) 2.In the display check mode, press the “JOG lever (left)” (top) key or the “DISPLAY” key

26、 of remote control. The machine enters the Self-Diagnosis Result Display Mode and the following display appears on the LCD screen. 3.When the “” key is pressed hereafter, the display on the remote control LCD advances to the next display. When the “” key is pressed, the display returns to the previo

27、us display. 5.Each time the “JOG lever (left) ” (top) key or the “DISPLAY” key of remote control is pressed, the display changes in the following order. Address and adjustment value display Jitter value and adjustment value display Block error value and adjustment value display ADIP error value and

28、adjustment value display Item title display Display on remote control LCD Display on remote control LCD Display on remote control LCD Display on remote control LCD Display on remote control LCD Item number Item number Item number Item number Item number Address Jitter value Block error value ADIP er

29、ror value Item title Adjustment value Adjustment value Adjustment value Adjustment value Adjustment value When the “DISPLAY” key of remote control is pressed while the above display appears, the screen changes to show the Simplified contents display. TEST MODE-3/6 -29- 4.To exit the Self-Diagnosis R

30、esult Display Mode and to return to the test mode (display check mode), press the “9” key. Contents of the error display codes Contents of the errorDisplay codeMeaning of code Simplified Description contents display No error00No error-No error 01 Illegal address is specified as AdrsWhen an attempt i

31、s made to access an abnormal address. the access target. Servo system error02High temperatureTempWhen temperature goes to abnormally high. 03Focus errorFcusWhen focus servo lock is lost. 04Spindle errorSpdlWhen disc rotation is abnormal. TOC error 11TOC errorTOCContents of the TOC has an error 12Rea

32、d data errorDataCannot read data with SYNC. Power supply 22Momentary failure of powerLBatMomentary power failure is detected. system error 31Offset errorOfstOffset error 32 Focus error, ABCDFocus error, ABCD offset error Offset system error ABCD offset error 33Tracking error, Offset errorTETracking

33、error, Offset error 34 X1 Tracking error, X1TEX1Tracking error, Offset error Offset error Description of error log display Error log codeContents 1The error that has occurred first. NThe error that has occurred last. N1The error that has occurred immediately before the last error. N2The second error

34、 before the last error. R_Accumulative recording hours TEST MODE-4/6 -30- Clearing the error display code When all of the repair works are completed, clear the error display code by the following procedure. How to clear the error display code 1.Enter the test mode. (Refer to TEST MODE on page 26.) 2

35、.Press the “JOG lever (left) ”(top) key or the “DISPLAY” key of remote control to enter the Self-Diagnosis Result Display Mode. 3.While the error code (any error code other than “R_*”) remains displayed on screen, press the “;” key twice. (All data of 1, N, N1 and N2 are cleared.) Sound Skip Check R

36、esult Display Mode The error counts of the errors that have occurred during recording and playback of this machine can be displayed to check them. How to Enter the Sound Skip Check Result Display Mode 1.Enter the test mode. (Refer to TEST MODE on page 26.) 2.Press the “2” or the “REC” key. Then the

37、machine enters the Sound Skip Check Result Display Mode of either during recording or during playback. The following display appears on LCD screen. Total error count of the record system (hexadecimal) Display on remote control LCD. Total error count of the playback system (hexadecimal) 3.When the “2

38、” key is pressed, the total error counter is displayed on LCD. Each time the “” key is pressed, the display advances to the next display s shown below. Each time the “” key is pressed, the display returns to the previous display. When the “REC” key is pressed, the error count during recording is dis

39、played. When the “REC” key is pressed, the total error counter is displayed on LCD. Each time the “” key is pressed, the display advances to the next display as shown below. When the “” key is pressed, the display returns to the previous display. When the “2” key is pressed, the error count during p

40、layback is displayed. : Playback/record error total count (hexadecimal) : Sound skip check item counter (hexadecimal) : The address that causes the sound skip at the latest. 6-digit address (hexadecimal) Playback Sound Skip Check Result Display Record Sound Skip Check Result Display Cause of sound s

41、kip error Cause of Description of the error the error EIBSound error correction error Playback StatDecoder status error AdrsCannot reach the target address. BEmpBuffer became empty. BOvrBuffer became full and sound skipping occurs. Bful Amount of remaining buffer became scarce Recording and forced write o