Pioneer MJ-L77 Service Manual

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Operating instructions manual (100 pages)

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MINIDISC RECORDER

MJ-L77

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Model

Type

MJ-L77

MYXK

NVXK

÷ These products are component of systems. This product does not operate normally by

itself.

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.

Component

STEREO CD RECEIVER

SPEAKER SYSTEM

STEREO CASSETTE DECK

MINIDISC RECORDER

CONTENTS

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

PIONEER CORPORATION

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 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 1999

Power Requirement

AC220-230V

AC230V

Model

XC-L77

S-L9-LRW

S-L9-A-LRW

CT-L77

MJ-L77

4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

MINIDISC

Service manual

RRV2187

RRV2176

S-L8-LRW

RRV2178

RRV2199

RRV2201

7. GENERAL INFORMATION ................................ 43

7.1 DIAGNOSIS .................................................. 43

7.1.1 TROUBLESHOOTING ........................... 43

7.1.2 DISASSEMBLY ...................................... 46

7.2 IC .................................................................. 49

8. PANEL FACILITIES AND SPECIFICATIONS ....... 59

)

ORDER NO.

RRV2201

Remarks

This manual.

T - ZZE AUG. 1999 Printed in Japan

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Page 1: Table Of Contents
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 Alexandra Road, #04-01, Singapore 159936 PIONEER CORPORATION 1999 T –...
Page 2: Safety Information
Health & Safety Code Section 25249.6 – Proposition 65 IMPORTANT LASER DIODE CHARACTERISTICS THIS PIONEER APPARATUS CONTAINS MAXIMUM OUTPUT POWER: 32 mW LASER OF CLASS 1. WAVELENGTH: 785 nm SERVICING OPERATION OF THE APPARATUS S H O U L D B E D O N E B Y A S P E C I A L L Y INSTRUTED PERSON.
Page 3: Exploded Views And Parts List
See Contrast table (2) Fuse (5A) See Contrast table (2) Polyethylene Bag Z21–038 (0.03 × 230 × 340) (2) CONTRAST TABLE MJ-L77/MYXK and NVXK are constructed the same except for the following: Part No. Symbol and Description Mark Remarks MYXK type NVXK type...
Page 4 MJ-L77 2.2 EXTERIOR 32-2 32-1 Refer to “2.3 MD MECHANISM ASSY”.
Page 5 Sub Line AAP7060 Sub Panel AAP7061 Flap Plate AAP7062 Front Line AAP7066 (2) CONTRAST TABLE MJ-L77/MYXK and NVXK are constructed the same except for the following: Part No. Symbol and Description Mark Remarks MYXK type NVXK type Rear Panel ANC7828...
Page 6: Md Mechanism Assy
MJ-L77 2.3 MD MECHANISM ASSY CN102 CN105 CN101 CN103...
Page 7 MJ-L77 MD MECHANISM ASSY PARTS LIST Mark No. Description Part No. Mark No. Description Part No. CORE MAIN UNIT ASSY RWZ4334 Screw JGZ17P040FMC CORE SW UNIT ASSY RWZ4335 Screw PMB20P040FMC Lead Card 7P RDD1403 Servo Base Assy REA1283 Lead Wire...
Page 8: Block Diagram And Schematic Diagram
MJ-L77 3. BLOCK DIAGRAM To STEREO CD RECEIVER XC-L77 AND SCHEMATIC DIAGRAM (Refer to RRV2187) 3.1 BLOCK DIAGRAM (1/2) CN4702 OUTPUT SELECTOR (IC4240) BU40668BCF CN4202 CN4201 DECK DECK P. B. BUF (IC4250) NJM4558MD P. B. Mute (Q4261) 2SD2114K(VW) REC AMP...
Page 9 MJ-L77 Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST". SIGNAL ROUTE : MD AUDIO SIGNAL : DECK AUDIO SIGNAL DECK From STEREO CASSETTE DECK CT-L77 (Refer to RRV2199) : DIGITAL PB SIGNAL OPT.
Page 10 MJ-L77 3.2 BLOCK DIAGRAM (2/2) SIGNAL ROUTE : DIGITAL PB SIGNAL : DIGITAL REC SIGNAL : DIGITAL I/F : RF SIGNAL CORE MAIN UNIT ASSY HEAD DRIVER (IC116) REC HEAD (RWZ4334) BD7910FV 4M–DRAM (IC103) PICKUP M5M4V4400CTP-7 ASSY 1–5, 9–12, 14–18, 22–25 25–28...
Page 11 MJ-L77...
Page 12: Pickup Assy
MJ-L77 3.3 CORE MAIN UNIT and CORE SW UNIT ASSYS CORE MAIN UNIT ASSY (RWZ4334) CN101 PICKUP ASSY 10 11 (CARRIAGE)
Page 13 MJ-L77 SIGNAL ROUTE ¶ 1 – - are waveform numbers on pages 16 and 17. : DIGITAL PB SIGNAL : DIGITAL REC SIGNAL : DIGITAL I/F : RF SIGNAL CN104 CN401...
Page 14 MJ-L77 Voltages of CORE MAIN UNIT ASSY IC101 IC102 IC103 IC104 VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE 0.78V 1.53V 1.59V 1.2V 3.2V 0.8V 0.73V 3.18V 1.2V 1.4V 0.77V 1.65V 3.0V 1.4V 0.75V 1.59V 2.0V 1.4V 1.61V...
Page 15 MJ-L77 IC106 IC109 IC110 IC112 IC113 VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE 2.77V 1.66V 4.95V 1.6V 2.77V 3.2V 1.62V 3.96V 0.49V 1.61V 3.2V 1.62V 4.99V 1.58V 3.2V 4.99V 1.58V 1.67V 1.61V 1.56V 0.11V 1.67V 1.62V 1.67V 2.46V 3.19V...
Page 16 MJ-L77 Waveforms Note: The encircled numbers denote measuring point in the schematic diagram and the PCB connection diagram. IC101-pin35 (ADIPO) IC101-pin30 (WBO) IC102-pin1 (EFM MON) (CORE MAIN UNIT ASSY) (CORE MAIN UNIT ASSY) (CORE MAIN UNIT ASSY) MODE: PLAY MODE: PLAY MODE: PLAY DISC: GGF1328 (MMD–212)
Page 17 MJ-L77 CN105-pin1 (LOAD –) IC602-pin28 (SYS CLK) IC602-pin19 (AD DATA) (CORE MAIN UNIT ASSY) (MAIN UNIT ASSY) (MAIN UNIT ASSY) MODE: EJECT MODE: STOP MODE: REC (ANALOG) DISC: GGF1328(MMD–212) DC2V/div., 0.5 µSec/div. DC2V/div., 50nSec/div. DC1V/div., 1mSec/div. –– GND –– GND ––...
Page 18 MJ-L77 3.4 MAIN UNIT (1/2) , AF UNIT and TRANS. UNIT ASSYS CN4101 CN104 DECK 14.0 – 16.0 – 5.0 MAIN UNIT ASSY (1/2) (AWU7395)
Page 19 MJ-L77 SIGNAL ROUTE : MD AUDIO SIGNAL : DECK AUDIO SIGNAL DECK DECK AF UNIT ASSY : DIGITAL PB SIGNAL (AWU7397) : DIGITAL REC SIGNAL DECK : DIGITAL I/F CN4701 DECK CN4702 Short for TESTMODE TRANS. UNIT ASSY (AWU7396) situation of connected to the CD RECEIVER 12.0...
Page 20 MJ-L77 3.5 MAIN UNIT (2/2), KEYR UNIT, KEYL UNIT and BLUE IND. UNIT ASSYS MAIN UNIT ASSY (2/2) KEYR UNIT ASSY (AWU7395) S4901 : 0 (EJECT) KEYL UNIT ASSY S4902 : £/8 (PLAY/PAUSE) KEYR UNIT ASSY (AWU7398) situation of connected 12.0...
Page 21 MJ-L77 Short for TESTMODE...
Page 22: Pcb Connection Diagram
MJ-L77 4. PCB CONNECTION DIAGRAM NOTE FOR PCB DIAGRAMS : 1. Part numbers in PCB diagrams match those in the schematic 3. The parts mounted on this PCB include all necessary parts for diagrams. several destinations. 2. A comparison between the main parts of PCB and schematic For further information for respective destinations, be sure to diagrams is shown below.
Page 23 MJ-L77 4.2 CORE MAIN UNIT ASSY ¶ 1 – - are waveform numbers on pages 16 and 17. CORE MAIN UNIT ASSY SIDE A 10 11 (RNP1733-B) IC101 IC106 IC102 IC103 IC104 IC114 Q101 Q102 SIDE B PICKUP ASSY (RNP1733-B)
Page 24 MJ-L77 4.3 MAIN UNIT ASSY STEREO CD RECIEVER XC-L77 SIDE A J4001 CN4202 MAIN UNIT ASSY CN4104 CN104 CN4901 (ANP7325-B) IC4183 IC4021 IC4051 IC4052 IC4016 IC4013 IC4022 IC4015 IC4018 IC4014...
Page 25 MJ-L77 SIDE B MAIN UNIT ASSY (ANP7325-B) Q4019 Q4071 Q4072 IC4171 IC4301 Q4040 Q4108 IC4101 Q4151 Q4101––––––––––––––––––Q4107...
Page 26 MJ-L77 4.4 AF UNIT and TRANS. UNIT ASSYS SIDE A AF UNIT ASSY CN4201 CN4103 (ANP7325-B) TRANS. UNIT ASSY CN4011...
Page 27 MJ-L77 SIDE B AF UNIT ASSY Q4201 IC4202 Q4201 Q4260 Q4231 Q4203 Q4202 IC4201 IC4240 Q4230 Q4232 Q4204 Q4242 Q4261 IC4250 Q4262 (ANP7325-B) TRANS. UNIT ASSY...
Page 28 MJ-L77 4.5 KEYR UNIT, KEYL UNIT and BLUE IND. UNIT ASSYS SIDE A SIDE B KEYL UNIT ASSY KEYR UNIT ASSY J4101 BLUE IND. UNIT ASSY (ANP7325-B)
Page 29: Pcb Parts List
MJ-L77 5. PCB PARTS LIST NOTES : Parts marked by “ NSP ” are generally unavailable because they are not in our Master Spare Parts List. mark found on some component parts indicates the importance of the safety factor of the part.
Page 30 MJ-L77 Mark No. Description Part No. Mark No. Description Part No. C4605 CKSQYF104Z50 C4104, C4105, C4703, C4713, C4714 CKSQYF473Z50 CORE SW UNIT ASSY C4053 CKSQYF474Z16 SWITCHES AND RELAYS RESISTORS S701 RSF1009 R4031 RD1/4PU122J S702 RSF1010 R4134, R4135 RD1/4PU221J Other Resistors RS1/10S&&&J...
Page 31 MJ-L77 Mark No. Description Part No. Mark No. Description Part No. TRANS. UNIT ASSY BLUE IND. UNIT ASSY SEMICONDUCTORS SEMICONDUCTORS D4001 1SS133 D4901 EB3804X(BCDE) D4902 UDZS8.2B COILS AND FILTERS OTHERS L4001 FILTER VTL-262 J4902 JUMPER WIRE D20PYY0210E SWITCHES AND RELAYS...
Page 32: Adjustment
MJ-L77 6. ADJUSTMENT JIGS AND MEASURING INSTRUMENTS Thermometer Test Disc Oscilloscope For servo system adjustment ..........GGF1328 (MMD-212) Optical Power Meter For recording/playback inspection ....GGF1328 (MMD-212), GGF1277, Jitter Meter TGYS1 (or MMD-110), Commercial discs XC-L77, DU-L77, Remote control supplied with XC-L77 ( CLD service remote control GGF1067) 6.1 NECESSARY ADJUSTMENT POINTS...
Page 33: Test Modes
MJ-L77 6.2 Test modes In the test modes, there are the Single operation mode and MD mech adjustment mode. 6.2.1 Single operation mode ¶ In this mode, when the play button is pressed, all repeat mode is selected automatically. ¶ For aging, you can select this single operation mode and keep the unit in the play mode for a long period of time.
Page 34 7 Key operations in the single operation mode The MJ-L77 has only the EJECT and PLAY/PLAY PAUSE keys on the operation panel. For other main operations in this mode, five jumper wires are arranged on the MAIN UNIT ASSY as shown below. Short between W4024 and each jumper wire to activate each operation.
Page 35 6.2.2 MD mech adjustment mode ¶ The MJ-L77 should be connect to the XC-L77 (CD receiver) and DU-L77 (Display unit provided with the XC-L77). ¶ When the MD mech adjustment is done, use the CLD service remote control (GGF1067) or the remote control provided with the XC-L77.
Page 36 7 MD mech adjustment items Note: The operation buttons mentioned in the following explanations are those for the MJ-L77 or the remote control equipped with the product. When using the service remote control, refer to the key comparison table on the previous page.
Page 37 MJ-L77 2 Laser Power Check Step No. Operation Keys and Operation Method FL Display Status Remarks At this time, check that the measuring value (REC hex = Standard Value power) meets the standard value of the table on the –...
Page 38: Preliminary Adjustment
MJ-L77 Preliminary Adjustment Step No. Operation Keys and Operation Method FL Display Status Remarks Turn on the power. Then, short the MECHA TEST EJECT Test mode jumpers (W4076 and W4098). Insert the test disc GGF1328 (MMD-212). LOADING GRT AJST Press the MENU key (until AUT YOBI is displayed).
Page 39: Defocus Adjustment
MJ-L77 Defocus adjustment Step No. Operation Keys and Operation Method FL Display Status Remarks Turn on the power. Then, short the MECHA TEST EJECT Test mode jumpers (W4076 and W4098). Insert the test disc GGF1328 (MMD-212). LOADING GRT AJST Press the MENU key.
Page 40 MJ-L77 Jitter/C1 Error Check at the time of Playback Step No. Operation Keys and Operation Method FL Display Status Remarks Turn on the power. Then, short the MECHA EJECT Test mode TEST jumpers (W4076 and W4098). Insert the test disc GGF1328 (MMD-212).
Page 41 MJ-L77 7 Jitter/C1 Error Check at the time of Playback SIDE A CORE MAIN UNIT ASSY Jitter Meter LEVEL JITTER EFM MON REFO Connection diagram Jitter/C1 Error Check at the time of Recording/Playback Step No. Operation Keys and Operation Method...
Page 42 MJ-L77 8 Jitter/C1 Error Check at the time of Recording/Playback Step No. Operation Keys and Operation Method FL Display Status Remarks Perform steps 5 to 13 of “ 7 Jitter/C1 Error Check a0069 c0009 Check the jitter/C2 error at the inner/ at the time of Playback ”.
Page 43: General Information
MJ-L77 7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 TROUBLESHOOTING • Rise-up sequence after AC power is applied of MD microcomputer Reset Release the hardware reset. Initialize the Set the port status. internal data The waiting time until power supply rise-up and becomes stable.
Page 44: Details Of Error Display
MJ-L77 7 DETAILS OF ERROR DISPLAY Error Display Details of Error Measure ÷ DEFECT occurred 10 times continuously during REC-PLAY. ÷ Check if there are scratches, dusts, fingerprints, or black Can't REC ÷ Recordable cluster became 0 since DEFECT occurred during spots on disc.
Page 45 MJ-L77 Details of Error Display Error Display Details of Error Measure ÷ Editing conditions were not satisfied for each editing function. ÷ Operating method is wrong. Try again using correct Can' t EDIT method. ÷ Temperature inside unit (MD unit) was too high due to fault.
Page 46: Disassembly
MJ-L77 7.1.2 DISASSEMBLY Removal of the Servo Mechanism Assy 1 Remove the screw A and screw B. 2 Disconnect the connectors (CN102, CN103, CN105), open the hook of part A, and tilt the upper side of the CORE MAIN UNIT ASSY to the front.
Page 47: Spring Installation
MJ-L77 Removal of the MD Pick-up Screw A 1 Remove the MD Head. (One screw A) (M1.7 × 4) 2 Remove the Screw Guide at the lower side of the MD Pick-up. (One screw B) MD Head Remove the hook after the 3 Remove the S.
Page 48 MJ-L77 Removal of the Head Lifter Head Lifter Installation 1 Remove the Lifter SP. 1 Install part A in the Servo Base with the Head Lifter tilted to the 2 Tilt the Head Lifter to the rear and push part A to disengage it.
Page 49 MJ-L77 7.2 PARTS ¶ The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams. 7.2.1 IC M5M4V4400CTP-7 (IC103: CORE MAIN UNIT ASSY) DRAM Pin Assignment (Top view) Pin Function...
Page 50 MJ-L77 M56758FP (IC106: CORE MAIN UNIT ASSY) 5-channel Actuator Driver Block Diagram Pin Assignment (Top view) REG+ CH3IN VBS2 – IN3– VBS1 REGB OUT3 IN3+ IN1+ – OUT3 IN1+ IN3– IN1– OUT1 CH3IN VBS1 VBS2 VBS1 VBS2 VM1+ VM3+ –...
Page 51 MJ-L77 PD5523A (IC104: CORE MAIN UNIT ASSY) Mechanism Control m-com. Pin Assignment (Top view) Block Diagram I/O PORT Port P0 Port P1 Port P2 Port P3 Port P4 Port P5 Port P6 Internal Peripheral A/D Converter Functions (10bits × 8 channels)
Page 52 MJ-L77 Pin Function Name Description 1 to 7, 100 P96 to P90, P97 I/O These are 8 bit I/O ports with the same functions as P0. By software selection, it functions as the input terminals for the timers B0 to B2, the output terminals for the D/A converter, the expansion input terminals of the A/D converter, or the A/D trigger input terminals.
Page 53 MJ-L77 Name Description 55 to 61, 63 P37 to P31, P30 I/O These are 8 bit I/O ports with the same functions as P0. A15 to A9, A8 The middle 8 bits (A8 to A15) of the address are put out.
Page 54 MJ-L77 LR376487 (IC102: CORE MAIN UNIT ASSY) Encode/Decode/ATRAC Pin Assignment (Top view) 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 EFMO TOTMON PLCK...
Page 55 MJ-L77 Name Description Name Description RAA4 Address output to external D-RAM; ADR4 Digital input signal DOUT Digital output signal RAA8 Address output to external D-RAM; ADR8 PLLBVC – Capacitor connection terminal for PLLB signal RAOEX Data output enable signal output to external D- DGND –...
Page 56: Head Driver
MJ-L77 BD7910FV (IC116: CORE MAIN UNIT ASSY) Head Driver Block Diagram Name Description PDGND Predrive GND EFM signal input MUTE Mute control Pre Driver N.C. N.C. Not used N.C. VOD2 Sink output (lower side power MOS drain) H-bridge GND (lower side power MOS source)
Page 57 MJ-L77 IR3R55M (IC101: CORE MAIN UNIT ASSY) RF Signal Processor Block Diagram Name Description ∗ XDISC Logic signal output terminal (outputs DISC signal inversion signal) ∗ XSGAIN Logic signal output terminal (outputs SGAIN signal inversion signal) AGND Analog part GND terminal...
Page 58 MJ-L77 PDG249A (IC4101: MAIN UNIT ASSY) System Control µ-com Pin Function l l o l l o l l o l l o l l o l l o l l o l l o − − − − −...
Page 59: Panel Facilities And Specifications
MJ-L77 8. PANEL FACILITIES AND SPECIFICATIONS Connecting to the Rest of the System CD receiver MD recorder Tape deck CD receiver power cord Ribbon cable Optical cable MD recorder power cord Ribbon cable Important: Before making or changing any rear panel connections, make sure that all the components are switched off and unplugged from the power supply.
Page 60 MJ-L77 Controls & Display(DU-L77) MINIDISC 10 11 12 1 MD loading slot 2 Power light – lights when the unit is on. 3 6 button – Press to play an MD, or pause one that’s already playing (press again to restart playback).
Page 61 MJ-L77 Remote Control(DU-L77) 10 11 REMOTE LOCATOR & › AUX/CD-R SOUND DISPLAY TAPE TIMER/ ! — + ⁄ CHARACTER CANCEL STANDBY/ ON 1 MENU – Press to access various features, 12 Up – Use to raise the volume. including station memory naming, changing 13 Down –...
Page 62: Specifications
MJ-L77 Specifications Recording method ....Magnetic field modulation overwriting type Playback method ..........Non-contact optical type Sampling 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)

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Pioneer MJ-L77 Service Manual

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