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1、ORDER NO. PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexa
2、ndra Road, #04-01, Singapore 159936 ? ? ? ? ? ? PIONEER CORPORATION 1999c MJ-L77 RRV2201 1. SAFETY INFORMATION.2 2. EXPLODED VIEWS AND PARTS LIST.3 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.8 4. PCB CONNECTION DIAGRAM . 22 5. PCB PARTS LIST.29 6. ADJUSTMENT.32 CONTENTS 7. GENERAL INFORMATION . 43 7.1 D
3、IAGNOSIS.43 7.1.1 TROUBLESHOOTING . 43 7.1.2 DISASSEMBLY . 46 7.2 IC .49 8. PANEL FACILITIES AND SPECIFICATIONS.59 T ZZE AUG. 1999 Printed in Japan MINIDISC RECORDER Type Model Power RequirementRemarks MJ-L77 MYXKAC220-230V NVXKAC230V THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
4、ComponentModelService manualRemarks STEREO CD RECEIVERXC-L77RRV2187 S-L9-LRWRRV2176 SPEAKER SYSTEMS-L9-A-LRWRRV2176 S-L8-LRWRRV2178 STEREO CASSETTE DECKCT-L77RRV2199 MINIDISC RECORDERMJ-L77RRV2201This manual. These products are component of systems. This product does not operate normally by itself.
5、Please connect it to the STEREO CD RECEIVER XC-L77 and the DISPLAY UNIT DU-L77, an accessory of the XC-L77, for adjustment and operation inspection. ) MINIDISC RadioFans.CN 收音机爱 好者资料库 MJ-L77 2 IMPORTANT THIS PIONEER APPARATUS CONTAINS LASER OF CLASS 1. SERVICING OPERATION OF THE APPARATUS SHOULD BE
6、DONE BY A SPECIALLY INSTRUTED PERSON. LASER DIODE CHARACTERISTICS MAXIMUM OUTPUT POWER: 32 mW WAVELENGTH: 785 nm Control method of the current through a laser diode. The resistor R105 on the CORE MAIN UNIT ASSY (For MD mechanism assy) are for the limiting of current through a laser diode. Control me
7、thod of the laser output power The laser pickup assy provide the photo-diodes and APC (Auto Power Control) circuit. The photo-diode detect output of the laser diode then IC104 control the APC circuit according to the signal voltage of the photo-diode via IC101. The Variable resistancer on the FPC in
8、 the Laser pickup assy can be adjusted the output level of Laser diode to fix the rated output level. Laser Interlock Switch The loading position detect switch S101 is set to “ LOAD ON ” (ON: low level, OFF: high level) position, IC104 get the “ LOAD ” signal, and hand the laser “ LDON ” signal to N
9、o. 9 terminal (LDON) of the Laser pickup assy. Then a laser diode can be lighted exept when the level of signal “LOAD ” is low. Additional Laser Caution 1. SAFETY INFORMATION This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified
10、 technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not q
11、ualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to ca
12、use cancer, birth defects or other reproductive harm. Health normally connected to GND when used. 15TEST1I 16TEST2ITest-use input; Encoder/Servo Mode and ATRAC Mode changeover No.NameI/O Description 17X176KOOClock output; f = 176.4kHz (4fs) 18FODRFOFocus servo forward output; PWM 19FODRROFocus servo
13、 reverse output; PWM 20TRDRFOTracking servo forward output; PWM 21TRDRROTracking servo reverse output; PWM 22SLDRFOSlide servo forward output; PWM 23SLDRROSlide servo reverse output; PWM 24SPDRFOSpindle servo forward output or spindle servo output; PWM 25SPDRROSpindle servo reverse output or spindle
14、 rotation forward/reverse changeover 26RAA3OAddress output to external D-RAM; ADR3 27RAA2OAddress output to external D-RAM; ADR2 28RAA1OAddress output to external D-RAM; ADR1 29RAA0OAddress output to external D-RAM; ADR0 (LSB) 30RAA10OAddress output to external D-RAM; ADR10 (MSB) 31VDD2Power supply
15、for DRAM interface Pin Assignment (Top view) Pin Function MJ-L77 55 No.NameI/O Description 32RAA4Address output to external D-RAM; ADR4 |O | 36RAA8Address output to external D-RAM; ADR8 37RAOEXOData output enable signal output to external D- RAM 38DGNDDigital GND 39RACASXOColumn address strobe signa
16、l output to external D-RAM 40RAD2I/OExternal DRAM and data input/output; D2 41RAD3I/OExternal D-RAM and data input/output; D3 (MSB) 42RAA9OAddress output to external D-RAM; ADR9 43RARASXOLow address strobe signal output to external D- RAM 44RAWEXOData write enable signal output to external D- RAM 45
17、RAD1I/OExternal D-RAM and data input/output; D1 46RAD0I/OExternal D-RAM and data input/output; D0 (LSB) 47TCRSOTrack cross signal 48ACRCEROADIP CRC error flag monitor output 49PLCKOEFM PLL clock output during Play 50EFM0OEFM signal output during Record; C1F (C1 error flag) monitor output during Play
18、. 51X700KOOClock output; f = 705.6kHz; clock is not output when RSTX = 0. 52EXPORT0OMicrocomputer extension output port 0 53EXPORT1OMicrocomputer extension output port 1 54TESO1OMicrocomputer extension output port 2 during PLLLR changeover 55TEST3I/OMicrocomputer extension output port 3 during PLLOS
19、C changeover 56TEST4I/OMicrocomputer extension output port 4 during EXTCLK changeover 57CDDATAI/OCD data input for high-speed dubbing; micro- computer extension port 5 during changeover 58CDLRCKI/OCD LR clock input for high-speed dubbing; microcomputer extension port 6 during changeover 59CDBCLKI/OC
20、D bit clock input for high-speed dubbing; microcomputer extension port 7 during changeover 60VXIIPLL clock input for varying pitch 61VPOOPLL phase error input for varying pitch 62VDD1Digital power supply 63DGNDDigital GND 64XII Oscillation circuit input; 33.8688MHz 65XOO No.NameI/O Description 66DIN
21、IDigital input signal 67DOUTODigital output signal 68PLLBVCCapacitor connection terminal for PLLB signal 69DGNDDigital GND 70LRCKOMusic data Lch/Rch changeover output 71BCLKOMusic data shift lock 72DFCKOClock for AD/DA converter digital filter; 256fs 73ADDATAIAudio data input 74DADATAOAudio data out
22、put 75FEMONOFocus error signal monitor output 76TOTMONOTotal signal monitor output 77TEMONOTracking error signal monitor output 78SBCKIDIN sub code readout clock; EIAJ CP-309 format 79SBOODIN sub code serial data; EIAJ CP-309 format 80SBSYODIN sub code block synchronization signal; EIAJ CP-309 forma
23、t 81SFSYODIN sub code frame synchronization signal; EIAJ CP-309 format 82FOKOFocus OK detection signal; 0: Focus OK 83SENSEOServo status detection signal; 1: Auto Move/ Auto Jump/Auto Focus lead-in in progress 84COUTOTrack cross signal output 85MCCKOClock output for microcomputer; clock is output ev
24、en when RSTX = 0. 86DINTXOInterrupt Request output signal for system computer interface 87VDD1Digital power supply 88DGNDDigital GND 89RSTXITip reset input; reset with L (NOTE) 90SYD0I/OSystem computer interface data bus terminal; (LSB) 91SYD1 |I/OSystem computer interface data bus terminal 96SYD6 9
25、7SYD7I/OSystem computer interface data bus terminal; (MSB) 98SYWRXISystem computer interface register write pulse input 99SYRDXISystem computer interface register read pulse input 100SYRSISystem computer interface register select input Terminals denoted with an asterisk (*) are (Open) terminals that
26、 are not externally connected. NOTE) Set RSTX to L when the power is being turned ON or after it has been turned ON. MJ-L77 56 No. Name Description 1NCNot connected 2VccPower supply 3CSChip selection input 4SKSerial clock input 5DIStart bit, operation code, address, and serial data input 6DOSerial d
27、ata output, READY/BUSY internal status indication output 7GNDGround 8NCNot connected BD7910FV (IC116: CORE MAIN UNIT ASSY) Head Driver No.Name Description 6PDGNDPredrive GND 7EFMEFM signal input 8MUTEMute control 9N.C. 10N.C.Not used 11N.C. 12VOD2Sink output (lower side power MOS drain) 13VSSH-bridg
28、e GND (lower side power MOS source) 14VOD1Sink output (lower side power MOS drain) 15VOS1Source output (upper side power MOS source) 16VDDH-bridge power supply (upper side power MOS drain) 17VOS2Source output (upper side power MOS source) 18RegDRVExternal PNP drive output for the regulator 19RegOUTR
29、egulator output (emitter follower output) 20RegNFRegulator feedback terminal Pre Driver 20191817161514131211 12345678910 + Vreg INReg NF Reg OUT Reg DRV VOS2 VDD VOS1 VOD1 VOD2 N.C. VSS Reg GND Reg SEL VG SVCC PD GND EFM MUTE N.C. N.C. + No.Name Description 1VregINRegulator input and regulator power
30、 supply 2RegGNDRegulator GND 3RegSELRegulator selection terminal 4VGPower MOS drive voltage input 5SVCCEFM high-level output voltage BR93LC56F (IC110: CORE MAIN UNIT ASSY) EEPROM Dummy Bit Order Register Order Decode Control Clock Generation Data Register Address Buffer Power Voltage Detection Write
31、 Inhibit High Voltage Generation Address Decoder R/W Amp. 2048bits EEPROM Array 16bits 16bits 7bits 7bits 3 4SK CS Vcc NC DI DO GND NC 6 5 1 2 8 7 4 3 2 1 NC Vcc CS SK NC GND DO DI5 6 7 8 Block Diagram Pin Function Pin Assignment (Top view) Block Diagram Pin Function MJ-L77 57 1 2 3 4 5 6 7 8 9 10 1
32、1 12 27 26 25 RF1 RF2 RF3 RF4 REFI REFO RFADD TCGI AIN BIN EIN FIN 36 35 34 33 32 31 30 29 28 ADIPI ADIPO NC ADLPFO 22KO 22KI WBO TCGO AOUT BOUT EOUT FOUT POUT GOUT ATTR EFMAGI EFMAGC AGND AVCC EFMI EFMO RF2-1 ADAGI ADAGC BAIS AVCC XSTBY XDISC AGND XSGAIN DGND DTEMP LATCH CLOCK DATA DVCC LOGIC HPFLP
33、F BIAS ADIP AGC DIFF DIFF EFM AGC RESISTOR blinks when paused. 6Character display 7MD function Highlights when in MD re- corder mode. 8MD record indicator Lights during record or record-pause mode. 9Synchro indicator Lights in CD or tape synchro-recording mode. 10 Auto mark indicator Lights when aut
34、omatic track numbering is switched on. 11 Digital indicator Lights when MD recorder is in digital signal input mode. 12 Mono LP indicator Lights when recording in mono/long-play mode. Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the doub
35、le-D symbol are trademarks of Dolby Laboratories Licensing Corporation. ) MINIDISC3 4 21 5 6 78910 1112 MJ-L77 61 Remote Control(DU-L77) 1MENU Press to access various features, including station memory naming, changing the tape reverse mode, and so on. 2Tape deck mode Press to switch the sound to ta
36、pe deck and start the tape playing (if theres one loaded). 3SOUND Press to put the $ and buttons into tone, subwoofer level and balance control mode. 4DISPLAY Press to change the kind of information that the display shows. The choices available depend on the current function (CD, tape, etc.). 5SET P
37、ress to finish operations such as setting the clock, setting the reverse mode, and so on. 6MD REC Press to put MD recorder into record-pause mode. 7TAPE REC Press to put tape deck into record-pause mode. 8TIMER/CHARACTER Press to start setting the timer. Also use to select characters when naming tun
38、er station memories, etc. 9& CANCEL Press to stop playback (or recording) of the CD/MD/tape. Also use to cancel operations, such as setting the clock, before the SET button has been pressed (see 5 above). 10 $? buttons Press to fast-reverse / fast-forward the CD/MD/tape. 11 CD mode Press to switch t
39、he sound to CD and start the disc playing (if theres one loaded). 12 Up Use to raise the volume. 13 Down Use to lower the volume. 14 Tuner mode Press to switch the sound to tuner, switch between AM and FM, and switch between preset station memories. 15 MD mode Press to switch the sound to MD and sta
40、rt the disc playing (if theres one loaded). 16 STANDBY/ON Press to switch the unit between standby and on modes. Note: this unit consumes about 1W of electricity in standby mode. 17 AUX/CD-R mode Press to switch the sound to the component connected to the AUX/CD-R inputs. 18 REMOTE LOCATOR Use to sw
41、itch on/off auto locate. 14151316 AUX/CD-RSOUNDDISPLAYSETMD REC TAPETIMER/ CHARACTER & CANCEL $? !? ? +? VOL STANDBY/ON REMOTE LOCATOR OFFON ? 123456789121011 17 18 MJ-L77 62 Specifications Recording method.Magnetic field modulation overwriting type Playback method . Non-contact optical type Samplin
42、g frequency.44.1 kHz, 32 kHz, 48 kHz Frequency response. 20 Hz - 20 kHz Signal-to-Noise ratio . 98 dB Wow and flutter . Limit of measurement (0.001% W.PEAK) or less (EIAJ) Power requirements.AC 220- 230V, 50/60 Hz (MYXK type) AC 230V, 50/60 Hz (NVXK type) Power consumption . 18 W Dimensions .220 (W)
43、 x 75 (H) x 310 (D) mm Weight .2.6 kg Accessories Operating instructions .1 Optical digital cord .1 Power cord.1 Warranty card .1 Note: Specifications and design subject to possible modification with- out notice, due to improvement. Accessories Optical digital cord (RKX1031) (L = 0.5m) Power cord (ADG7009) (For NVXK type) Power cord (ADG7010) (For MYXK type)
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