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Sony MZ-R91 - page 1
SERVICE MANUAL POR T ABLE MINIDISC RECORDER US Model Canadian Model A ustralian Model Chinese Model MZ-R90 AEP Model UK Model E Model T our ist Model MZ-R90/R91 SPECIFICA TIONS MZ-R90/R91 US and f oreign patents licensed from Dolby Laboratories Licensing Corporation. Photo: MZ-R91 (Blue type) Syst em Audio playing system MiniDisc digital audi o sys ...
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Sony MZ-R91 - page 2
– 2 – T ABLE OF CONTENTS 1. SER VICING NO TES ............................................... 3 2. GENERAL ................................................................... 4 3. DISASSEMBL Y ......................................................... 5 4. TEST MODE .............................................................. 1 1 5. ELECTRICAL ...
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Sony MZ-R91 - page 3
– 3 – NO TES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body . During repair , pay attention to electrostatic break-down and also use the proce ...
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Sony MZ-R91 - page 4
– 4 – SECTION 2 GENERAL • LOCA TION OF CONTROLS – The recor der – 1 2 3 5 4 6 7 8 9 qd 0 qa qs qf qg ql qh qj qk 1 9 2 3 4 5 6 7 8 0 1 3 2 6 7 0 8 9 qa qs qd qf 5 4 1 x (stop) /CHARGE button 2 Display window 3 REC indicator 4 DC IN 3V jack 5 Jog lever 6 i /LINE OUT (headphones/line out) jack 7 MIC (PLUG IN POWER) jack 8 LINE IN (OPTICAL) ...
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Sony MZ-R91 - page 5
– 5 – P ANEL ASSY , BOTT OM Note: Follow the disassembly procedure in the numerical order given. SECTION 3 DISASSEMBL Y • This set can be disassembled in the order shown below . Upper Panel Section Main Board, “Case Assy, Battery” LCD Module, “Button, Control”, “Service Assy, Upper Panel” (R90/R91) Main Board, “Case Assy, Batter ...
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Sony MZ-R91 - page 6
– 6 – • MZ-R91 1 five scre ws (1.4) 2 LCD modul e 3 control button 4 upper panel service assy 1 five tapping scre ws (1.7) 2 LCD module 5 upper panel service ass y 3 control button 4 adhesive sheet (control button) Note: The control buttons are stuck with strong adhesive sheets . As the control buttons are v er y fragile, do not peel them off ...
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Sony MZ-R91 - page 7
– 7 – ) ) ) ) @ @ ^ 6 Remov e the or namental belt assy in the direction of arrow C . 2 Open tow ard the direction B to disengage two bosses and conv ex portions pointed with * . 1 Pull toward the direction A to disengage two bosses . Note: As the ornamental belt assy is very fragile, do not giv e an excessiv e force to the entire assy when rem ...
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Sony MZ-R91 - page 8
– 8 – 2 boss 3 MD mechanism deck (MT -MZR90-165) 2 boss 4 tension spring (ar m) 5 set chassis ass y 1 screw (1.4) 1 screw (1.4) 8 bearing 5 screw 4 rack spring 3 precision pan screw (M1.4) 1 washer (0.8 - 2.5) 2 gear (SA) 5 screw 7 Pull off the lead screw . 6 B A 9 Opening the ov er write head toward the direction A , remo ve th e OP Service as ...
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Sony MZ-R91 - page 9
– 9 – 1 Remov e two solders of DC motor (ov er write head up/down) (M603). 1 Remov e four solders of DC motor (sled) (M602). 1 Remov e four solders of DC motor (spindle) (M601). DC motor (sled) circular hole 3 motor flexib le board 2 adhesive sheet Note: Align a circular hole in the stripping paper with a circular hole in the DC motor (sled), w ...
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Sony MZ-R91 - page 10
– 10 – 4 two precision pan screws (M1.4) 5 DC motor (sled) (M602) 1 Remov e four solders of motor flexib le board. 2 washer (0.8 - 2.5) 3 gear (SA) 1 Remov e six solders of motor flexib le board. 4 three precision pan screws (M1.4) qa DC motor (ov er write head up/down) (M603) 6 two precision pan screws (M1.4) qs gear chassis assy 9 screw (M1.2 ...
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Sony MZ-R91 - page 11
– 11 – SECTION 4 TEST MODE [Outline] • This set provides the Overall adjustment mode (Assy mode) that allows CD and MO disc to be automatically adjusted when in the test mode. In this overall adjustment mode, the protect switch is detected to judge the disc, CD or MO, and each adjustment is automatically executed in order . If a fault is foun ...
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Sony MZ-R91 - page 12
– 12 – [Configuration of T est Mode] [Manual Mode] Mode to adjust or check the operation of the set by function. Normally , the adjustment in this mode is not executed. • T ransition method in Manual Mode 1. Setting the test mode. (See page 11) 2. Press the > or [VOL +] key activates the manual mode where the LCD display as shown below . 3 ...
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Sony MZ-R91 - page 13
– 13 – 5. The display changes a shown below each time the jog key on the set is turned up or [DISPLAY] key on the remote com- mander is pressed. However in the power mode (mode number 700 ’ s), only the power adjustment value is displayed. 6. Quit the manual mode, and press x key to return to the test mode (display check mode). AD 85 731 • ...
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Sony MZ-R91 - page 14
– 14 – [Sound Skip Chec k Result Display Mode] This set can display and check the error count occurring during record and play . • Setting method of Sound Skip Chec k Result Display Mode 1. Setting the test mode. (See page 11) 2. Press the N or [REC] key on the set activates the sound skip check result display mode where the LCD displays as s ...
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Sony MZ-R91 - page 15
– 15 – [Self-Diagnosis Displa y Mode] • This set uses the self-diagnosis system in which if an error oc- curs in recording/playback mode, the error is detected by the model control and power control blocks of the microprocessor and information on the cause is stored as history in EEPROM. By viewing this history in test mode, it helps you to a ...
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Sony MZ-R91 - page 16
– 16 – • Description of Indication History History code number Description 1st0 The first error 1st1 T otal recording time when 1st0 was generated (Higher rank byte) 1st2 T otal recording time when 1st0 was generated (Lower rank byte) N 0 The last error N 1 T otal recording time when N 0 was generated (Higher rank byte) N 2 T otal recording t ...
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Sony MZ-R91 - page 17
– 17 – [Ke y Check Mode] This set can check if the set and remote commander function nor- mally . • Setting Method of Key Check Mode 1. Setting the test mode. (See page 11) 2. Press the [T MARK] or [DISPLAY] key on the remote com- mander for several seconds activates the key check mode where all segments of LCD turn OFF . (At the last two dig ...
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Sony MZ-R91 - page 18
– 18 – SECTION 5 ELECTRICAL ADJUSTMENTS [Outline] • In this set, automatic adjustment of CD and MO can be per- formed by entering the test mode. (See page 11) Howe ver , before starting automatic adjustment, the memory clear , power adjustment and temperature adjustment must be performed in the manual mode. • The ke ys in the description re ...
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Sony MZ-R91 - page 19
– 19 – • Adjustment method of VC PWM Duty (L) (mode number: 762) 1. Select the manual mode of the test mode, and set the mode number 762. (See page 12) 2. Connect a digital voltmeter to the TP915 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL - -] key (voltage down) so that the voltage becomes 2.5 ± 0.02 V . Proceed to t ...
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Sony MZ-R91 - page 20
– 20 – [T emperature Correction] • Adjustment Method of temperature correction 1. Select the manual mode of test mode, and set the mode num- ber 014. (See page 12) 2. Measure the ambient temperature. 3. Adjust with [VOL +] , [VOL - -] key so that the adjusted value (hexadecimal value) becomes the ambient temperature. (Initial value: 14h = 20 ...
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Sony MZ-R91 - page 21
– 21 – [Laser P ower Chec k] Connection : Check Method : 1. Select the manual mode of test mode, and set the laser power adjusting mode. (mode number 010) 2. Press the . key continuously until the optical pick-up moves to the most inward track. 3. Open the cover and set the laser power meter on the objective lens of the optical pick-up. 4. Pres ...
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Sony MZ-R91 - page 22
MZ-R90/R91 – 23 – – 24 – SECTION 6 DIA GRAMS 6-1. BLOCK DIA GRAM – SER V O Section – WV U OVER WRITE HEAD DRIVE IC603 DIGITAL SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER, 16M BIT D-RAM IC502 (1/2) RF AMP, FOCUS/TRACKING ERROR AMP IC501 FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED MOTOR DR ...
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Sony MZ-R91 - page 23
MZ-R90/R91 – 25 – – 26 – – 27 – – 28 – 6-2. BLOCK DIA GRAM – A/D, D/A CONVER TER, A UDIO Section – 6-3. BLOCK DIA GRAM – KEY CONTROL/DISPLA Y/PO WER SUPPL Y Section – A/D, D/A CONVERTER IC301 EEPROM IC802 05 D (Page 24) F (Page 24) • SIGNAL PATH : REC (ANALOG IN) : PLAY (ANALOG OUT) : REC (DIGITAL IN) RESET A (Page 24) ANA ...
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Sony MZ-R91 - page 24
MZ-R90/R91 – 29 – – 30 – – 31 – – 32 – 6-4. PRINTED WIRING BO ARD • Semiconductor Location Ref . No. Location D301 B-10 D302 B-9 D303 C-4 D304 B-10 D501 G-10 D600 F-6 D601 F-9 D602 G-6 D603 H-9 D801 E-12 D802 F-12 D803 D-11 D804 F-11 D901 D-7 D902 C-9 D903 E-9 D905 C-11 D906 C-11 D907 D-11 IC301 C-12 IC302 C-13 IC303 B-11 IC304 B- ...
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Sony MZ-R91 - page 25
MZ-R90/R91 – 33 – – 34 – – 35 – – 36 – – 37 – 6-5. SCHEMA TIC DIA GRAM • See page 38 for W aveforms. • See page 41 for IC Bloc k Diagrams. ...
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Sony MZ-R91 - page 26
– 39 – – 40 – – 41 – – 42 – • IC Block Dia grams IC301 AK4517BVQ-L 1 49 50 51 52 53 54 55 56 57 48 58 59 60 61 62 63 64 24 23 22 18 17 29 28 27 26 25 21 20 19 32 31 30 2 3 4 5 6 7 8 LRCK BCLK SDTO NC SDTI DIF0 DIF1 MCLK CLOCK DIVIDER HPF DPGA DBB D/A CONVERTER AUDIO INTERFACE CONTROLLER 12 13 14 15 16 DCODE0 DCODE1 DCODE2 9 10 11 ...
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Sony MZ-R91 - page 27
– 43 – IC601 MPC17A56FT A IC602 MPC17A17XDTBR2 + – + – 24 23 22 21 20 19 VC VG 1 2 3 4 5 6 7 8 3PHASE CONTROL PRE DRIVER 48 VC VC VC PRE DRIVER H-BRIDGE CONTROL VC H-BRIDGE CONTROL VG 47 46 45 44 43 42 41 39 38 37 + – 40 36 35 34 VC PRE DRIVER VG 9 10 11 12 33 32 31 30 VC VC PRE DRIVER H-BRIDGE CONTROL VC H-BRIDGE CONTROL VG VC PRE DRIVER ...
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Sony MZ-R91 - page 28
– 44 – IC603 MPC18A20MT AEL 21 22 23 24 25 26 27 28 29 30 16 17 18 19 20 2 3 5 4 6 7 8 9 10 1 11 12 13 14 15 CONTROL LOGIC CHARGE PUMP SAW GEN SAW CLK OSC EFM LOGIC BIAS VREF PRE DRIVER VREF COMP COMP + PRE DRIVER SAW CLK EN ENB OP RF SS DTC NC PGNDLG VB VIN C1H VGH C1L VCC CK COSC MODE 1 MODE 2 INM ERRID ERRIV GND VSET VG VGI PGNDG PGNDB HB HA ...
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Sony MZ-R91 - page 29
– 45 – IC804 R V5C348A-E2 IC901 MPC18A31FT A 1 2 3 4 5 10 9 8 7 6 VDD OSC IN OSC OUT CE /INTR 32K OUT SCLK SO SI VSS ALARM W REGISTER (WEEK,MIN,HOUR) ALARM D REGISTER (MIN,HOUR) 32KHz OUTPUT CONTROL TIME COUNTER (SEC,MIN,HOUR,WEEK,DAY,MONTH,YEAR) SHIFT REGISTER INTERRUPT CONTROL VOLTAGE DETECT DIVIDER CORRECTION DIV OSC COMPARATOR W COMPARATOR ...
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Sony MZ-R91 - page 30
– 46 – 6-6. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC501 SN761056ADBT (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin Name I/O Description 1 TE O Tracking error signal output to the CXD2660GA (IC502) 2 REXT — Connected to the external resistor for the ADIP amplifier control 3 WPPLPF — Connected to the external capacitor for low-pass filt ...
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Sony MZ-R91 - page 31
– 47 – • MAIN BOARD IC502 CXD2660GA Pin No. Pin Name I/O Description 1 VDC0 — Power supply terminal (+1.8V) (for internal logic) 2 MNT0 I/O Not used (open) 3 MNT1 O Recording shock detect signal output to the system controller (IC801) 4 MNT2 O Off track signal output to the SN761056ADBT (IC501) and system controller (IC801) 5 MNT3 O Focus O ...
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Sony MZ-R91 - page 32
– 48 – Pin No. Pin Name I/O Description 46 FS256 O Clock signal (11.2896 MHz) output to the A/D, D/A converter (IC301) (X' tal system) 47 to 52 A03, A04, A02, A05, A01, A06 O Address signal output to the external D-RAM Not used (open) 53 VDIO1 — Power supply terminal (+2.4V) (for I/O) 54 VSIO1 — Ground terminal (for I/O) 55 to 59 A00, ...
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Sony MZ-R91 - page 33
– 49 – Pin No. Pin Name I/O Description 103 XLRF O Serial latch signal output terminal Not used (open) 104 CKRF O Serial clock signal output terminal Not used (open) 105 DTRF O Writing data output terminal Not used (open) 106 APCREF O Control signal output to the reference voltage generator circuit for the laser automatic power control 107 LDDR ...
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Sony MZ-R91 - page 34
– 50 – • MAIN BOARD IC801 CXR701080-013GA (MASTER CONTROLLER) Pin No. Pin Name I/O Description 1 SYNC REC I SYNCHRO REC switch (S801) input terminal “ L ” : off, “ H ” : on 2 OFTRK I Off track signal input from the CXD2660GA (IC502) 3 PROTECT I Rec-proof claw detect input from the protect detect switch (S806) “ L ” : recording pos ...
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Sony MZ-R91 - page 35
– 51 – Pin No. Pin Name I/O Description 39 FFCLR O Input latch output for starting signal to the MPC18A31FTA (IC901) 40 SLEEP O System sleep control signal output to the MPC18A31FTA (IC901) “ H ” : sleep on 41 TSB EDGE I TSB slave edge detect signal input terminal 42 GND SW O Ground line switching signal output terminal 43 XRST I System res ...
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Sony MZ-R91 - page 36
– 52 – Pin No. Pin Name I/O Description 80 VB MON I Un-regulator power supply voltage monitor input terminal (A/D input) 81 CHG MON I Rechargeable battery voltage monitor input from the MPC18A31FTA (IC901) (A/D input) 82 VREF MON I Reference voltage monitor input from the SN761056ADBT (IC501) (A/D input) 83 WK DET I Set key starting detect sign ...
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Sony MZ-R91 - page 37
– 53 – (1) P ANEL SECTION (MZ-R90) SECTION 7 EXPLODED VIEWS Les composants identifiés par une marque 0 sont critiquens pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. The components identified by mark 0 or dotted line with mark 0 are critical for safety . Replace only with part number specified. • Items ...
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Sony MZ-R91 - page 38
– 54 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark (2) P ANEL SECTION (MZ-R91) 51 4-223-077-21 LID, BATTER Y CASE (BLUE) 51 4-223-077-31 LID, BA TTERY CASE (RED) 51 4-223-077-41 LID, BA TTERY CASE (WHITE) 52 X-4952-184-1 PANEL (L) ASSY , BOTTOM (BLUE) 52 X-4952-186-1 PANEL (R) ASSY , BOTTOM (RED) 52 X-4952-188-1 PA ...
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Sony MZ-R91 - page 39
– 55 – (3) CHASSIS SECTION Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 101 X-4952-044-1 BEL T ASSY (S), ORNAMENT AL (SIL VER) (R90/R91) 101 X-4952-337-1 BEL T (B) ASSY , ORNAMENT AL (BLACK) (R90: BLACK) 102 4-223-076-01 SHEET (TERMINAL), INSULA TING 103 4-223-083-01 SPRING (ARM), TENSION 104 X-4952-042-1 CHASSIS AS ...
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Sony MZ-R91 - page 40
– 56 – 165 166 177 167 168 169 167 170 153 171 172 173 154 159 M602 152 153 175 M601 151 176 M603 152 155 154 156 157 158 162 152 163 154 164 154 174 160 161 R91 (4) MD-MECHANISM DECK SECTION (MT -MZR90-165) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 151 1-675-466-11 MOTOR FLEXIBLE BOARD 152 4-963-883-42 SCREW (M1 ...
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Sony MZ-R91 - page 41
– 57 – SECTION 8 ELECTRICAL P ARTS LIST Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3323-361-A MAIN BOARD, COMPLETE (R90: AEP , UK, E, AUS, CH/R91: AEP , UK) A-3323-374-A MAIN BOARD, COMPLETE (R90: FR/R91: FR) A-3323-491-A MAIN BOARD, COMPLETE (R90: HK, JEW/R91: HK, JEW) A-3323-493-A MAIN BOARD, COMPLETE (R90: US ...
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Sony MZ-R91 - page 42
– 58 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C502 1-127-772-81 CERAMIC CHIP 33000PF 10% 10V C503 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16V C504 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16V C505 1-164-943-11 CERAMIC CHIP 0.01uF 10% 16V C506 1-127-772-81 CERAMIC CHIP 33000PF 10% 10V C507 1-125-777-11 CERAMIC CHI ...
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Sony MZ-R91 - page 43
– 59 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C1004 1-164-939-11 CERAMIC CHIP 0.0022uF 10% 16V < CONNECTOR > * CN501 1-778-168-11 CONNECTOR, FFC/FPC (ZIF) 20P * CN601 1-793-510-21 CONNECTOR, FPC (ZIF) 5P * CN602 1-793-511-21 CONNECTOR, FPC (ZIF) 15P * CN801 1-793-511-21 CONNECTOR, FPC (ZIF) 15P < DIOD ...
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Sony MZ-R91 - page 44
– 60 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MAIN Q309 8-729-928-81 TRANSISTOR DTC144EE-TL Q501 8-729-928-81 TRANSISTOR DTC144EE-TL Q601 8-729-046-43 FET HA T2051T -EL Q602 8-729-046-42 FET HA T2050T -EL Q603 8-729-046-45 FET SI2302DS-T1 Q604 8-729-047-48 TRANSISTOR UMD12N-TR Q605 8-729-928-27 TRANSISTOR DT A ...
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Sony MZ-R91 - page 45
– 61 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MAIN R535 1-216-864-11 MET AL CHIP 0 5% 1/16W R536 1-216-864-11 MET AL CHIP 0 5% 1/16W R537 1-216-864-11 MET AL CHIP 0 5% 1/16W R602 1-216-864-11 MET AL CHIP 0 5% 1/16W R604 1-218-891-11 MET AL CHIP 68K 0.5% 1/16W R605 1-218-891-11 MET AL CHIP 68K 0.5% 1/16W R606 1 ...
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Sony MZ-R91 - page 46
– 62 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Sony Corporation P ersonal Audio Division Compan y 9-927-187-12 2000B0586-1 Printed in Japan C 2000. 2 Published by General Engineering Dept. S804 1-771-770-21 SWITCH, SLIDE (HOLD) S806 1-771-860-21 SWITCH, PUSH (PROTECT DETECT) S807 1-771-770-21 SWITCH, SLIDE (SYN ...
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Sony MZ-R91 - page 47
SERVICE MANUAL MZ-R90/R91 SUPPLEMENT -1 File this supplement with the service manual. Subject: 1. Addition of K orean Model 2. Correction (ENG-00014) US Model Canadian Model A ustralian Model Chinese Model MZ-R90 AEP Model UK Model E Model T our ist Model MZ-R90/R91 2000. 07 ...
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Sony MZ-R91 - page 48
– 2 – 1. Ad dition of K orean Model K orean Model has been added. This is the same as Hong K ong model which is not described in this supplement-1. Ref er to MZ-R90/R91 original ser vice manual (9-927-187- S ) f or other information. • EXPLODED VIEWS P age Hong K ong Model K orean Model Ref. No. Part No. Description Remark 107 A-3323-292-A MA ...
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Sony MZ-R91 - page 49
– 3 – 2. Correction EXPLODED VIEWS ! : Indicates changed portion. Pa ge INCORRECT CORRECT 54 Ref. No. Part No. Description Remark 9 3-048-299-01 WASHER (LCD) Ref. No. Part No. Description Remark 53 3 9 3 % Ref. No. Part No. Description Remark 114 3-049-215-01 SHEET (PRO) Ref. No. Part No. Description Remark chassis section 61 chassis section 61 ...
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Sony MZ-R91 - page 50
– 4 – • ELECTRICAL P AR TS LIST P age INCORRECT CORRCT Ref. No. Part No. Description Remark IC501 8-759-682-68 IC SN761056CDBT IC601 8-759-678-83 IC MPC17A56FT AEB IC901 8-759-678-82 IC MPC18A31FT AEB Q101 8-729-044-58 FET SI2304DS-T1 Q201 8-729-044-58 FET SI2304DS-T1 Ref. No. Part No. Description Remark IC501 8-759-661-14 IC SN761056ADBT IC6 ...
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