Boss Audio Systems CLR-70 Manuel de service

– 1 –MZ-R70SERVICE MANUALPORTABLE MINIDISC RECORDERModel Name Using Similar Mechanism MZ-R90/R91Mechanism Type MT-MZR70-165Optical Pick-up Name LCX-2R

– 10 –3-5. MD MECHANISM DECK(MT-MZR70-165)3-6. SERVICE ASSY, OP3 boss4 bosschassis assy5 MD mechanism deck (MT-MZR70-165)1 screw (1.4)2 screw (1.4)

– 11 –3-7. HOLDER ASSY2 Remove two solders of DC motor (over write head up/down) (M603).1 Remove four solders of DC motor (sled) (M602).3 Remove four

– 12 –4 two precision pan screws(M1.4)5 DC motor (sled) (M602)1 Remove four solders of motor flexible board.2 washer (0.8 - 2.5)3 gear (SA)1 Remove si

– 13 –IC502FB501C5302526283236147118116119120117114113 112115110109 111104108 106104105 103101102 100144 14637 46 47 50 53 56 59 64 6842 45 48 51 55 5

– 14 –4-2-4. Configuration of Test ModeNote: *1) on the set*2) on the remote commander*3) on the set or remote commander4-3. MANUAL MODEMode to adjust

– 15 –5. The display changes a shown below each time the jog key onthe set is turned up or [DISPLAY] key on the remote com-mander is pressed.However i

– 16 –4. When [REC] key on the set is pressed, the total of error countis displayed on the LCD, and each time the> key is pressed,the error count d

– 17 –4-6. SELF-DIAGNOSIS DISPLAY MODE• This set uses the self-diagnosis system in which if an error oc-curs in recording/playback mode, the error is

– 18 –• Description of Indication HistoryHistory code number Description1st0 The first error1st1 Total recording time when 1st0 was generated (Higher

– 19 –4-7. KEY CHECK MODEThis set can check if the set and remote commander function nor-mally.• Setting Method of Key Check Mode1. Setting the test m

– 2 –Flexible Circuit Board Repairing• Keep the temperature of the soldering iron around 270°Cduring repairing.• Do not touch the soldering iron on th

– 20 –SECTION 5ELECTRICAL ADJUSTMENTS5-1. OUTLINE• In this set, automatic adjustment of CD and MO can be per-formed by entering the test mode. (See pa

– 21 –• Adjustment method of VC PWM Duty (L)(mode number: 762)1. Select the manual mode of the test mode, and set the modenumber 762. (See page 14)2.

– 22 –7. If NG, set the manual mode. Perform automatic adjustmentfor the items not accepted. (See page 14)• Overall CD adjustment itemsItem No. Conte

– 23 –13. To clear the data in overall adjustment mode, set the manualmode and change the mode number 021 (Res NV) to reset theNV. (See page 14)14. Wh

– 24 –Connecting Location:– MAIN BOARD (SIDE A) –– MAIN BOARD (SIDE B) –TP5105TP914TP915TP1001TP1002R1005

– 25 – – 26 –6-1. BLOCK DIAGRAM — MD SECTION —SECTION 6DIAGRAMSMZ-R7004IXIYJXJYCBADPD-OPD-INRFAMPABCDAMPAPCTRACKINGERRORFOCUSERRORPEAK/BOTMADIPRFPEAKB

MZ-R70– 27 – – 28 –6-2. BLOCK DIAGRAM — AUDIO SECTION —OVER WRITEHEAD DRIVEQ601, 602SWITCHINGREGULATORQ603EFMLOGICA/DCONV.04EFMMOTORDRIVEF1R1CLKM603OV

MZ-R70– 29 – – 30 –04TO PBSECTIONBOETO REC/AMPSECTIONDRMC KEYTO REC/AMPSECTIONCSWDTSCLKRECSW & LCDMODULE UNITPAUSESYSTEM CONTROLLERIC801 (3/3)8883

– 31 – – 32 –MZ-R701ABCDEFGHI234567891011TP904C638R619C632C525C925L901LF901TH901D907C930C905C917C915L903C528C527C617C618C616FB505C304L301C303C202C113C

– 33 – – 34 –MZ-R701ABCDEFGHIJ2345678910111213R1005R1004R1006Q1001IC301IC501C210C108R211R112R118C216C118C116C320C322C212C332C111R319R317C208C110C335R1

– 3 –1. SERVICING NOTE ... 42. GENERAL...

– 35 – – 36 –6-5. SCHEMATIC DIAGRAM — MAIN BOARD (1/3) —• Refer to page 30 for Waveforms.• Refer to page 41 for IC Block Diagrams.MZ-R70(Page 38)(Page

– 37 – – 38 –MZ-R706-6. SCHEMATIC DIAGRAM — MAIN BOARD (2/3) —• Refer to page 42, 43 for IC Block Diagrams.(Page 36)(Page 39)

– 39 – – 40 –MZ-R706-7. SCHEMATIC DIAGRAM — MAIN BOARD (3/3) —• Refer to page 41, 43 for IC Block Diagrams.(Page 36)(Page 38)

– 41 –IC501 SN761056IC303 TA2131FLIC302 NJM21736-8. IC BLOCK DIAGRAM1TEREXTWpp-LPFVREFCDD-CIyIxJxJyAA-CBADIPFEABCDAVCCOFC-1OFC-2PSLPEQAGNDRFOUTCCSL2VC

– 42 –123456VCEFMCLKHBPGND1 2HAVGVG2C1HC1LVC2VRECINOERECONSW(2.5/1.3V)DTCVREFDW TPOUTGNDR1F1VRECIN 1OUTAPGND1 1OUTBVRECIN 2VREC 1LIL 1PGND2 1PGND2 2LI

– 43 –CLOCKDIVIDERCONTROLREGISTERI/FAUDIOI/FCONTROLLERHPFIPGALMCLKCMODECCLK(SSI)CDTI(SSO)CDTODGNDVDVBVAAGNDVCOMDZFOPGARROUT1PDRSTSSBLIN1RIN1TST1LIN2RI

– 44 –Pin No. Pin Name I/O Pin Description1 TE O Tracking error signal output to the CXD2660GA (IC502)2 REXT — Connected to the external resistor for

– 45 –Pin No. Pin Name I/O Pin Description1 VDC0 — Power supply terminal (+1.8 V) (for internal logic)2 MNT0 I/O Not used (open)3 MNT1 O Recording sho

– 46 –Pin No. Pin Name I/O Pin Description53 VDIO1 — Power supply terminal (+2.4 V) (for I/O)54 VSIO1 — Ground terminal (for I/O)55 to 59A00, A07, A10

– 47 –Pin No. Pin Name I/O Pin Description108 VDC4 — Power supply terminal (+1.8 V) (for internal logic)109 TRDR O Tracking servo drive PWM signal (–)

– 4 –SECTION 1SERVICING NOTENOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNITThe laser diode in the optical pick-up block may suffer ele

– 48 –Pin No. Pin Name I/O Pin Description1 SYNC REC I SYNCHRO REC switch (S801) input terminal “L”: off, “H”: on2 OFTRK I Off track signal input

– 49 –Pin No. Pin Name I/O Pin Description43 XRST ISystem reset signal input from the MPC18A31FTA (IC901) “L”: resetFor several hundreds msec. aft

– 50 –Pin No. Pin Name I/O Pin Description87 SET KEY 2 I Set key input terminal (A/D input) (B, jog, END SEARCH keys input)88 REC KEY I REC key in

– 51 –13234561125101010129131416724158931731819MT-MZR70-1652021222399ABABCCSECTION 7EXPLODED VIEWSNOTE:• The mechanical parts with no referencenumber

– 52 –65666768696770537172735459M6025253M601 51M6035255545657586252635464547460617-2. MECHANISM DECK SECTION(MT-MZR70-165)Ref. No. Part No. Descriptio

– 53 –SECTION 8ELECTRICAL PARTS LISTNOTE:• Due to standardization, replacements inthe parts list may be different from theparts specified in the diagr

– 54 –C526 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16VC527 1-164-854-11 CERAMIC CHIP 15PF 5% 16VC528 1-164-854-11 CERAMIC CHIP 15PF 5% 16VC529 1-104-847-

– 55 –Ref. No. Part No. Description Remark Ref. No. Part No. Description RemarkFB502 1-414-228-11 FERRITE BEAD INDUCTORFB503 1-414-228-11 FERRITE BEAD

– 56 –Ref. No. Part No. Description RemarkR517 1-216-864-11 METAL CHIP 0 5% 1/16WR518 1-216-845-11 METAL CHIP 100K 5% 1/16WR519 1-216-821-11 METAL CHI

– 57 –Ref. No. Part No. Description Remark< VIBRATOR >X501 1-781-725-21 VIBRATOR, CRYSTAL (22.5MHz)X801 1-781-575-21 VIBRATOR, CERAMIC (16.9344M

– 5 –SECTION 2GENERALThis section is extracted frominstruction manual.

– 58 –MZ-R70Sony CorporationPersonal Audio Division Company9-927-631-122000B0425-1Printed in Japan C2000. 2Published by General Engineering Dept.

SERVICE MANUALSony CorporationAudio Entertainment Group2000I04041-1DPrinted in Japan C2000. 9Published by General Engineering Dept.9-927-631-81• ACCES

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– 8 –Note : This set can be disassemble according to the following sequence.SECTION 3DISASSEMBLY3-1. BLOCK ASSY, BOTTOM3-2. PANEL BLOCK ASSY, UPPERNot

– 9 –3-3. LCD MODULE3-4. MAIN BOARD1 screws (1.7)3 LCD moduleclaws24 screw (1.4)qs5 screw (1.4)8 screw (1.7)6 screws (1.7)7 stay1 CN601qd CN5013 Remov