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Sony MZ-R50 manual

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Table of contents for the manual

  • Page 1

    MICROFILM MZ-R50 SERVICE MANUAL POR T ABLE MINIDISC RECORDER SPECIFICA TIONS US Model Canadian Model AEP Model UK Model E Model A ustralian Model T our ist Model Model Name Using Similar Machanism NEW MD Machanism T ype MT -MZR-50-143 Optical Pick-up T ype KMS-280A US and foreign parts licensed Dolby Laboratories Licensing Corporation. System Audio[...]

  • Page 2

    – 2 – Specifications ........................................................................... 1 1. SER VICING NO TE ....................................................... 3 2. GENERAL Location and Function of Controls .................................... 4 3. DISASSEMBL Y 3-1. Upper Panel Assy , Bottom Panel Assy Remov al ...... 20 3-2. Mai[...]

  • Page 3

    – 3 – SECTION 1 SER VICING NO TE When repairing this device with the po wer on, if you remov e the main board or open the upper panel assembly , this de vice stops working. In this case, you can work without the device stopping by fastening the hook of the Open/Close detection switch (S817) with tape Upper panel ass y Main board Door open/close[...]

  • Page 4

    – 4 – SECTION 2 GENERAL This section is e xtracted from instruction manual.[...]

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    – 20 – SECTION 3 DISASSEMBL Y Note : Follow the disassembly procedure in the numerical order given. 3-1. UPPER P ANEL ASSY , BO TT OM P ANEL ASSY REMO V AL r T he equipment can be removed using the follo wing procedure. Set Upper panel assy, Bottom panel assy Main board Mechanism deck SWITCH UNIT (with JOG DIAL) Power board, Switch board CLV bo[...]

  • Page 21

    – 21 – 3-3. MECHANISM DECK (MT -MZR50-143) REMO V AL 3-2. MAIN BO ARD REMO V AL 8 7 LCD flexible board (Main board CN803) 1 Screws (M1.4 toothed lock) 5 Flat cable (24 core) (Main board CN801) 3 OP flexible board (Main board CN501) 4 JOG unit flexible board (Main board CN904) 6 MD frexible board (Main board CN502) 2 Screw (HP) Main board 3 Mech[...]

  • Page 22

    – 22 – 3-4. OPTICAL PICK-UP ASSY , REC BO ARD REMO V AL 3-5. CL V BO ARD REMO V AL 3 6 Optical pick-up assy 2 Screws (M1.4x3.0 locking) 5 Screw REC board 1 OP flexible board 4 MD flexible board 3 2 Remove solder CLV board 1 Screws (M1.4 precision pan) Mechanism dec k[...]

  • Page 23

    – 23 – 3-6. BA TTER Y CASE ASSY REMO V AL 3-7. PO WER BO ARD , SWITCH BO ARD REMO V AL 3 3 4 1 Battery case assy Chassis (Main) ass y 2 Screws (M1.4 precision pan) 5 4 4 3 Remove solder 2 Remove solder Power board Switch board Battery case assy 1 Screws (M1.4 toothed lock)[...]

  • Page 24

    – 24 – 3-8. SWITCH UNIT (WITH JOG DIAL) REMO V AL 3 5 2 Switch unit (with JOG dial) Ornamental belt assy 4 Screws (1.7) 1 Screw (Precision) Chassis (Main) assy Holder (dial)[...]

  • Page 25

    – 25 – SECTION 4 TEST MODE [Operations When T est Mode is Set] When the test mode is set, the LCD will display as follows. • The LCD performs the following repeatedly . R OM version displayed / all lit / all of f • The display can be held and checked by pressing P key . • The self-diagnostic display appears while the DISPLA Y key is press[...]

  • Page 26

    – 26 – [Serv o Mode] • Set the test mode, press the + key , and set the servo mode using the V OLUME + and – keys. • When the servo mode is set, the optical pickup will move to the outer circumference or inner circumference if the + key or = key is pressed. • T o set other modes, refer to “ Structure of T est Mode ”. • Structure o[...]

  • Page 27

    – 27 – • Adjusting Method Note : There is basically no display for individual adjustment items. Only such upper position titles as SER V O, A UDIO, etc. (100s position) are displayed. 1. When the adjustment modes are set according to “Structure of Servo Mode”, the last two digits of the mode number and the adjustment value written in the [...]

  • Page 28

    – 28 – [A udio Mode] • Set the test mode, press the + ke y , and set the audio mode using the V OLUME + and – keys. • T o set other modes, refer to “Structure of T est Mode”. • Structuer of A udio Mode ” key p key p key ” key VOLUME +key or – key VOLUME +key or – key VOLUME +key or – key Mode : 100 Audio mode M Mode : 110 [...]

  • Page 29

    – 29 – [Mecha Mode] • Set the test mode, press the + key , and set the mecha mode using the V OLUME + and – keys. • T o set other modes, refer to “Structure of T est Mode”. • Structure of Mecha Mode • At mode numbers 200, 210 to 212, the optical pick up can be moved to the outer circumference or inner circumference using the = or [...]

  • Page 30

    – 30 – * Display during MO automatic adjustment 4. If the automatic adjustment results are OK, the following will be displayed. 5. If the automatic adjustment results are NG, the following will be displayed. * When the mode number is 039, 057 and the focus bias value is NG, the following will be displayed No. Mode No. Adjustment 1 032 MO playba[...]

  • Page 31

    – 31 – 5-4. DD 2.8V Adjustment Connection : Adjusting Method : 1. Connect the digital voltmeter to test point TP8507 (+2.8V) and TP8505 (AGND) on power board. 2. Adjust the R V801 for 2.8V reading on the digital voltmeter . Connection point and adjustment location : POWER board SECTION 5 ADJUSTMENTS 5-1. Precautions for Laser Diode Emission Che[...]

  • Page 32

    – 32 – 5-5. Laser P ower Chec k Connection : Adjusting Method : 1. Set the servo mode of the test mode (Mode : 000). 2. Press the ” ke y , and set the laser power adjustment mode (Mode : 020) using the volume + and – keys. 3. Press the = key and move the optical pickup to the inner most circumference. 4. Open the cover and set the laser pow[...]

  • Page 33

    – 33 – 5-7. Low Reflection CD T raverse Adjustment Connection : Adjusting Method : 1. Set the servo mode of the test mode (Mode : 000). 2. Press the ” ke y , and set the low reflection CD playback adjust- ment mode (Mode : 040) using the volume + and – keys. 3. Load any MO disc available on the market. 4. When the ” key is pressed, the lo[...]

  • Page 34

    – 34 – Adjustment Location : CN501 IC501 C504 C510 IC503 AP5500 (RF) AP574 (LDIO) AP5430 (RF) AP5117 (VCC) AP5500 (RF) AP574 (LDIO) AP5430 (RF) AP51 17 (VCC) SP543 TP5980 (TE) TP5980 (TE) [MAIN BO ARD] (SIDE B) [MAIN BO ARD] (SIDE A)[...]

  • Page 35

    – 35 – Pin No. Pin name I/O Description 1 MNT 0 O T raverse count signal output. 2 MNT 1 O T rack jump detect output. 3 MNT 2 – Not used (Open). 4 MNT 3 – Not used (Open). 5 SWDT I Inputs write data signal from system controller (IC801). 6 SCLK I Inputs serial clock signal from system controller (IC801). 7 XLA T I Inputs serial latch signal[...]

  • Page 36

    – 36 – Pin No. Pin name I/O Description 56 A V SS – Ground terminal. 57 PDO – Not used (Open). 58 PCO O Decoder PLL master clock PLL phase comparison output. 59 FILI I Decoder PLL master clock PLL filter input. 60 FILO O Decoder PLL master clock PLL filter output. 61 CL TV I Decoder PLL master clock PLL VCO control voltage input. 62 PEAK I [...]

  • Page 37

    – 37 – Pin No. Pin name I/O Description 1 CLCS O Chip select output to real time clock (IC804). 2 XRST O Reset output. L : Reset 3 WRPWR O Laser power switching signal output. 4 TX O Write data transfer timing output. 5 SENSE I Internal status (SENSE) input. 6 LDON O Laser ON signal. H : ON 7 XSHOCK I Track jump detection input. 8 –––– [...]

  • Page 38

    – 38 – Pin No. Pin name I/O Description 51 A VREF I A/D converter reference voltage input. 52 A V DD – A/D converter power supply terminal. 53 AM3 MNT I AC adaptor or EXT battery detection input. L : EXT battery 54 TEMP I T emp meter (IC803) input. 55 KEY3 I PLA Y/REC key input. 56 KEY4 I Key input. 57 KEY0 I Key input. 58 KEY1 I Key input. 5[...]

  • Page 39

    – 39 – – 40 – – 42 – – 41 – – 43 – 6-2. BLOCK DIA GRAM • Signal path. E : PB a : REC N : MIC 6-3. CIRCUIT BO ARDS LOCA TION MZ-R50 REC board CLV board MAIN board POWER board SWITCH board[...]

  • Page 40

    – 49 – – 50 – – 52 – – 51 – MZ-R50 6-5. SCHEMA TIC DIA GRAM – MAIN (1/3) SECTION – r Refer to page 61 f or IC Block Diagram. Note: • All capacitors are in µ F unless otherwise noted. pF: µµ F 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1 / 4 W or less unless other[...]

  • Page 41

    – 55 – – 56 – – 53 – – 54 – MZ-R50 r Refer to page 62 f or IC Block Diagrams. 6-6. SCHEMA TIC DIA GRAM – MAIN (2/3) SECTION – Note: • All capacitors are in µ F unless otherwise noted. pF: µµ F 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1 / 4 W or less unless othe[...]

  • Page 42

    – 57 – – 58 – – 60 – – 59 – MZ-R50 Note: • All capacitors are in µ F unless otherwise noted. pF: µµ F 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1 / 4 W or less unless otherwise specified. • ¢ : internal component. • A : B+ Line. • C : panel designation. • P[...]

  • Page 43

    – 6 1 – MZ-R50 r IC BLOCK DI A GRAMS – MAIN (1/3) SECTION – IC501 CXA2523AR-T4 48 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 27 24 23 22 21 20 18 17 16 15 14 13 11 12 10 9 8 7 6 5 4 3 2 1 47 28 26 PTGR CFST GRV 3T WBL TEMP PBH WBL BPF C ABCDA AA GRVA HLPT BPF3T USRC PEAK3T BB RFA I CVB I VR I VR I VR I VR I VR I VR CC DD EE EE °[...]

  • Page 44

    – – 62 – IC804 DS1302Z IC806 MB3800PNF IC506 MPC18A20VM r IC BLOCK DI A GRAMS – MAIN (2/3) SECTION – 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 S A W S A W CLK OSC EFM LOGIC BIAS VREF PRE DRIVER VREF COMP COMP + PRE DRIVER S A W EN ENB OP RF SS DTC NC PGNDLG VB VIN VIH VGH CI[...]

  • Page 45

    – – 6 3 – IC802 RS5RJ29261 IC807 AK93C45 A V -L 2 3 5 4 6 7 8 1 OSC VSS CE VD IN VD OUT EXT V OUT VDD LX VLX LIMITER SOFT S T A R T VREF 1 VREF 2 VFM ± + ± + ± + DO 3 DI 2 SK 1 CS 5 GND 6 NC 7 NC 8 VCC D AT A REGISTER ADD BUFFERS INSTRUCTION REGISTER VPP GENER A TOR VPP SW DECODER VTEF EEPROM 1024BIT 64X16 R/W AMPS & AUTO ERASE INSTRUC[...]

  • Page 46

    – – 6 4 – IC303 AK4515-VQ r IC BLOCK DI A GRAM – MAIN (3/3) SECTION – 21 22 24 25 26 27 2 3 5 4 6 7 8 9 10 1 13 14 15 16 17 18 19 20 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 ADC Audio I/F Controller DPG A DB B DAC CONTROL REGISTER I/F CLOCK DRIVER PGAL PGAR VCML ADCL ADCR VCMR VD DGND XRST PD ±±± SDTO SDTI DIF0 DIF1 DZF TS[...]

  • Page 47

    – 65 – SECTION 7 EXPLODED VIEWS NOTE : • -XX, -X mean standardized parts, so they may hav e some difference from the original one. • Color indication of Appearance Parts Example : KNOB, BALANCE (WHITE) • • • (RED) ↑↑ Parts color Cabinet's color • Items marked “ * ”are not stocked since they are seldom required for routi[...]

  • Page 48

    – 66 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 51 X-4949-116-1 CASE ASSY , BATTER Y 52 1-782-709-11 WIRE (FLA T TYPE) (22 CORE) 53 A-3293-759-A SWITCH BOARD, COMPLETE 54 3-335-797-91 SCREW (M1.4), TOOTHED LOCK 55 A-3293-758-A POWER BOARD, COMPLETE 56 4-964-015-31 KNOB (OPEN) 57 X-4949-660-1 BEL T (S) ASSY • ?[...]

  • Page 49

    – 67 – 101 1-667-210-11 MD FLEXIBLE BOARD 102 4-963-883-01 SCREW (M1.4), PRECISION PAN 103 A-3293-756-A CL V BOARD, COMPLETE 104 1-667-690-11 CL V FLEXIBLE BOARD 105 3-338-645-31 WASHER (0.8-2.5) 106 X-4949-129-1 HOLDER ASSY 107 3-349-825-41 SCREW 108 A-3293-755-A REC BOARD, COMPLETE 109 4-995-575-01 SHEET , INSULA TING 110 4-995-573-01 SPRING,[...]

  • Page 50

    – 68 – NOTE : • Due to standardization, replacements in the parts list may be dif ferent from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some dif ference from the original one. • RESISTORS All resistors are in ohms MET AL : Metal-film resistor MET AL OXIDE :Me[...]

  • Page 51

    – 69 – C220 1-107-823-11 CERAMIC CHIP 0.47uF 10% 16V C221 1-109-982-11 CERAMIC CHIP 1uF 10% 10V C222 1-162-957-11 CERAMIC CHIP 220PF 5% 50V C223 1-117-919-11 T ANT AL. CHIP 10uF 20% 6.3V C224 1-165-128-11 CERAMIC CHIP 0.22uF 16V C225 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C231 1-119-660-11 T ANT AL. CHIP 4.7uF 20% 6.3V C240 1-117-919-11 T AN[...]

  • Page 52

    – 70 – C829 1-109-982-11 CERAMIC CHIP 1uF 10% 10V C830 1-110-569-11 T ANT AL. CHIP 47uF 20% 6.3V C831 1-104-852-11 T ANT AL. CHIP 22uF 20% 10V C833 1-164-156-11 CERAMIC CHIP 0.1uF 25V C834 1-162-927-11 CERAMIC CHIP 100PF 5% 50V C835 1-162-927-11 CERAMIC CHIP 100PF 5% 50V C836 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C839 1-110-569-11 T ANT AL.[...]

  • Page 53

    – 71 – Q810 8-729-905-35 TRANSISTOR 2SC4081-R Q811 8-729-927-62 TRANSISTOR UMX1 Q901 8-729-042-81 TRANSISTOR FZT788BTC Q902 8-729-026-53 TRANSISTOR 2SA1576A-T106-QR Q903 8-729-029-14 TRANSISTOR DTC144EUA-T106 Q904 8-729-042-81 TRANSISTOR FZT788BTC Q910 8-729-905-35 TRANSISTOR 2SC4081-R < RESISTOR > R101 1-218-867-11 RES,CHIP 6.8K 0.50% 1/[...]

  • Page 54

    – 72 – R802 1-216-851-11 MET AL CHIP 330K 5% 1/16W R803 1-216-857-11 MET AL CHIP 1M 5% 1/16W R816 1-216-851-11 MET AL CHIP 330K 5% 1/16W R817 1-216-851-11 MET AL CHIP 330K 5% 1/16W R818 1-216-857-11 MET AL CHIP 1M 5% 1/16W R820 1-218-887-11 RES,CHIP 47K 0.50% 1/16W R821 1-218-887-11 RES,CHIP 47K 0.50% 1/16W R822 1-218-887-11 RES,CHIP 47K 0.50% [...]

  • Page 55

    – 73 – L804 1-414-410-21 INDUCTOR 10uH L805 1-414-410-21 INDUCTOR 10uH < TRANSISTOR > Q803 8-729-807-52 TRANSISTOR 2SD1623-T Q804 8-729-822-62 TRANSISTOR 2SB1302-T Q805 8-729-905-35 TRANSISTOR 2SC4081-R Q888 8-729-029-14 TRANSISTOR DTC144EUA-T106 < RESISTOR > R801 1-216-789-11 MET AL CHIP 2.2 5% 1/16W R808 1-216-817-11 MET AL CHIP 4[...]

  • Page 56

    – 74 – MZ-R50 9-923-258-11 Son y Corporation P ersonal A&V Products Compan y 97L0290-1 Printed in Japan © 1997.12 Published b y Quality Engineering Dept. (Shibaura)[...]