Jvc-UXA-70-MD-Service-Manual-2电路原理图.pdf

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1、SERVICE MANUALMICR COMPONENT MD SYSTEMNo.20901BMar. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.UX-A70MDUX-A70MDArea Suffix UBUFUSHong KongSupplementChinaSingaporeIt will guide to be change in the following in service manual UX-A70MDNo.20901 issued before. The mistake is partially found in MD an

2、d the CD adjustment, and allsentences are replaced. (Refer to page 1-28 1-31 of service manual UX-A70MD No.20901)1.2. Guide of extension cable for repair.Parts No.UsageQUQ110-2130BM Extension for MD unitEXTUXA70MD-14P Extension for CD unit (2 piece use)ContentsAdjustment method (CD/MD section)-1-21)

3、CD section -1-22)MD section-1-3UTTaiwanUJ US militaryUPCoreaUX-A70MD1-2Adjustment Method (CD/MD section)1. Jigs and test instrumentsLaser power meterLaser power meter sensor (or disk sensor)Premastered disk (MRG-1018)Recordable disk2. Adjustment and check items1) Indications in the modes that all LC

4、Ds are on2) CD section(1) Indication of the C1 error(2) Cancel of the C1 error indication3) MD section(1) Setup of the TEST MODE 1(2) Initialization of the EEPROM(3) Adjustment of the laser power(4) Adjustment of the disk(5) Setup of the TEST MODE 2(6) Indication of variation in the pickup adjustmen

5、t value(7) Indication of the C1 error(8) Cancel of the TEST MODE3. Adjustment and check method1) CD section(1) Indication of the C1 error(2) Cancel of the C1 error indicationTo cancel the C1 error indication, cut off the power supply.While pressing both the POWER key and BACK SKIP key on the main un

6、it, turn on the primary power supply.FL indicationCRC = 0Press the CD OPEN/CLOSE key and insert the test disk.Press the CD PLAY key. The set starts counting and the number of error correction times is indicated every 10 seconds.200 Hz or lessFL indicationCRC = *UX-A70MD1-32) MD section(1) Setup of t

7、he TEST MODE 1While pressing both the POWER key and FORWARD SKIP key, turn on the primary power supply.FL indicationTEST MODE 1Setup is complete.(2) Initialization of the EEPROM(The EEPROM can be initialized on the precondition that the setup of the TEST MODE 1 is complete. After setup of the TEST M

8、ODE 1, proceed to the following operations with the remote controller*.)* For EJECT operation, use the EJECT key on the main unit.Initialization of the EEPROMPress the OPEN/CLOSEkey on the main unit(3) Adjustment of the playback laser power (4) Adjustment of the recording laser powerSet up the TEST

9、MODE 1.Insert the laser power meter sensor.Press the “2“ key on the remote controller.Set up the playback laser power.Increase the laser power with the F. SKIP key on the remote controller.Decrease the laser power with the B. SKIP key on the remote controller.Adjust the power to be 0.68 mW or more.

10、If the value exceeds 0.68 mW, approximate it to 0.68 mW as accurately as possible.Press the MD EJECT key on the main unit.Setup of the MD laser power is complete.Set up the TEST MODE 1.Insert the laser power meter sensor.Press the “4“ key on the remote controller.Set up the recording laser power.Inc

11、rease the laser power with the F. SKIP key on the remote controller.Decrease the laser power with the B. SKIP key on the remote controller.Adjust the power to be 6.23 mW or more. If the value exceeds 6.23 mW, approximate it to 0.68 mW as accurately as possible.Press the MD EJECT key on the main unit

12、.Setup of the MD laser power is complete.Press the PLAY MODE keyon the remote controller.FL indicationTEST MODE 1Setup is complete.Press the STOP key on the remote controller.Press the STOP key on the remote controller.Press the STOP key on the remote controller.Press the STOP key on the remote cont

13、roller.Press the STOP key on the remote controller.UX-A70MD1-4(5) Adjustment of the diskYESNOYESNONG Judgment Code TableCode NG item in adjustmentSet up the TEST MODE 1.Insert the premastered disk.Reading of TOC ends.Press the MD PLAY key on the remote controller.FL indicationON TUNINGAutomatic adju

14、stment starts.Adjustment OK?FL indicationOK TUNINGFL indicationNG ERR: XXXX: Refer to the NG judgment code table.Press the STOP key on the remote controller.Press the EJECT key on the main unit.Insert a recordable disk.Press the MD PLAY key on the remote controller.FL indicationON TUNINGFL indicatio

15、nON TUNINGAutomatic adjustment starts.Adjustment OK?FL indicationNG ERR: XXRefer to the NG judgment code table.Press the STOP key on the remote controller.Press the MD EJECT key on the main unit.Automatic adjustment ends.Press the POWER key on the main unit or remote controller.Cut off the power sup

16、ply after cancelling the TEST MODE.00 Automatic adjustment is incomplete. 01 Rest switch detection02 Focus-on03 EF balance, tracking offset adjustment (Pit area)04 ABCD level (I-V resistance) adjustment (Pit area)05 Focus servo AGC (Pit area)06 Tracking servo AGC (Pit area)07 Focus bias adjustment (

17、Pit area)08 EF balance, tracking offset adjustment (GRV area)09 ABCD level (I-V resistance) adjustment (GRV area)0A Focus servo AGC (GRV area)0B Tracking servo AGC (GRV area)0C Focus bias adjustment (GRV area)0D Room temperature measurement0E Write in EEPROM10 (Focus, TRK, SLED) AGC data read time-o

18、ut20 Pit area spindle lock30 Groove area spindle lockXX Automatic adjustment is complete.* If an error indication of “ERR:07“ appears at the first adjustment, try to make a fresh start of the same adjustment.Press the STOP key on the remote controller.UX-A70MD1-5Key to press Mode(6) Setup of the TES

19、T MODE 2(7) Indication of variation in the pickup adjustment valueASGTRGTRBFOBFGRFEXPFGCFGTGRTEXPTGCTG-1-2:-128127126:10(8) Indication of the C1 errorFL indication*X X Y Y Z ZFor investigating the mode in which an error occurred during the disk adjustment, freeze the set in the mode by pressing the

20、proper key (refer to the table on the right) on the remote controller before cancelling the TEST MODE 1. SLEEP key (Remote controller)“6“ key (Remote controller)“7“ key (Remote controller)“8“ key (Remote controller)“9“ key (Remote controller)STOP key (Remote controller)EJECT key (Main unit)FOCUS SEA

21、RCHPIT ROUGH SERVOGROOVE ROUGH SERVOTRACKING ONTRACKING OFFSTOPEJECTWhile pressing both the POWER key and FORWARD STOP key on the main unit, turn on the primary power supply.FL indication TEST MODE 2While pressing the STOP key on the main unit, press the FM/AM key on the main unit double. The TEST M

22、ODE 2 is set up.FL indication TEST MODE 2Setup is complete.Set up the TEST MODE 2.Press the MD OPEN/CLOSE key and insert the MD test disk.Press the “6“ key on the remote controller.FL indication*XXXXX - XXXX* Each time the “6“ key on the remote controller is pressed, the indication changes from ASG

23、to TRG, from TRG to TRB, and so on as shown in the figure. Set up the TEST MODE 2.Press the MD OPEN/CLOSE key and insert the MD test disk.Press the “8“ key on the remote controller. Counting of number of C1 errors starts and it continues until it counts up the maximum number of C1 errors with indica

24、tion (maximum number of error indication is 432). 200 Hz or less(9) Cancel of the TEST MODE(The cancel operation is common to the TEST MODE 1 and 2.)Cut off the primary power supply to cancel the TEST MODE.200103VICTOR COMPANY OF JAPAN, LIMITEDAUDIO & COMMUNICATION BUSINESS DIVISIONPERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan(No.20901B)UX-A70MD