索尼 sony_MZ-R50_service_manual 电路图 维修手册.pdf

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1、MICROFILM MZ-R50 SERVICE MANUAL PORTABLE MINIDISC RECORDER SPECIFICATIONS US Model Canadian Model AEP Model UK Model E Model Australian Model Tourist Model Model Name Using Similar Machanism NEW MD Machanism Type MT-MZR-50-143 Optical Pick-up Type KMS-280A US and foreign parts licensed Dolby Laborat

2、ories Licensing Corporation. System Audio playing system MiniDisc digital audio system Laser diode properties Material: GaAIAs Wavelength: l = 780 nm Emission duration: continuous Laser output: less than 44.6 m W (This output is the value measured at a distance of 200 mm from the lens surface on the

3、 optical pick-up block with 7 mm aperture.) Recording and playback time Maximum 74 minutes (MDW-74, stereo recording) Maximum 148 minutes (MDW-74, monaural recording) Revolutions 400 rpm to 900 rpm (CLV) Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 44.1 kHz

4、 Sampling rate converter Input: 32 kHz / 44.1 kHz / 48 kHz Coding Adaptive Transform Acoustic Coding (ATRAC) Modulation system EFM (Eight to Fourteen Modulation) Number of channels 2 stereo channels 1 monaural channel Frequency response 20 to 20,000 Hz 3 dB Wow and Flutter Below measurable limit Inp

5、uts Microphone: stereo mini-jack, 0.22-0.78 mV Line in: stereo mini-jack, 69-194 mV Optical (Digital) in: optical (digital) mini-jack Outputs Headphones: stereo mini-jack, maximum output level 5 mW+ 5 mW, load impedance 16 ohm Line out: stereo mini-jack, 194 mV , load impedance 10 kilohm General Pow

6、er requirements Sony AC Power Adaptor (supplied) connected at the DC IN 6 V jack: 120 V AC, 60 Hz (US, Canadian model) 220-230 V AC, 50/60 Hz (AEP model) 230-240 V AC, 50/60 Hz (UK, Hong Kong model) 240 V AC, 50/60 Hz (Australian model) 100-240 V AC, 50/60 Hz (E, Tourist model) Lithium ion rechargea

7、ble battery LIP-8 (supplied) Two LR6 (size AA) alkaline batteries (not supplied) Continued on page 2 2 Specifications . 1 1. SERVICING NOTE . 3 2. GENERAL Location and Function of Controls . 4 3. DISASSEMBLY 3-1. Upper Panel Assy, Bottom Panel Assy Removal . 20 3-2. Main Board Removal . 21 3-3. Mech

8、anism Deck (MT-MZR50-143) Removal . 21 3-4. Optical Pick-up Assy, REC Board Removal . 22 3-5. CLV Board Removal . 22 3-6. Battery Case Assy Removal . 23 3-7. Power Board, Switch Board Removal . 23 3-8. Switch Unit (with JOG Dial) Removal . 24 4. TEST MODE . 25 5. ADJUSTMENTS . 31 6. DIAGRAMS 6-1. Ex

9、planation of IC Terminals . 35 6-2. Block Diagrams . 39 6-3. Circuit Boards Location . 43 6-4. Printed Wiring Boards Main Section . 45 6-5. Schematic Diagram Main (1/3) Section . 49 6-6. Schematic Diagram Main (2/3) Section . 53 6-7. Schematic Diagram Main (3/3) Section . 57 7. EXPLODED VIEWS 7-1. U

10、pper Panel, Bottom Panel Section . 65 7-2. Chassis Section . 66 7-3. Mechanism Deck Section . 67 8. ELECTRICAL PARTS LIST . 68 ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT

11、DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRI

12、TICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270C during repairing. Do not touch the soldering iron on the sa

13、me conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. TABLE OF CONTENT

14、S This MiniDisc Recorder is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the buttom exterior. For customers in Europe Battery operation time See “Battery life” Battery life Batteries Recording Playback LIP-8 lithium ion Approx. Approx. Rechargeable battery 4 h

15、ours 7 hours Two LR6 (size AA) Approx. Sony alkaline dry batteries 12 hours LIP-8 + Two LR6 (size AA) Approx. 22 hours Dimensions Approx. 109.5 x 19.7 x 77 mm (w/h/d) (4 3 /8 x 25 /32 x 3 1 /8 in.) Mass Approx. 190 g (6.8 oz) the recorder only Approx. 240 g (8.5 oz) incl, a recordable MD, and LIP-8

16、lithium ion rechargeable battery Supplied accessories AC power adaptor (1) Headphones with a remote control (1) LIP-8 lithium ion rechargeable battery (1) Dry battery case (1) Ear pads (2) Carrying case (1) Design and specifications are subject to change without notice. 3 SECTION 1 SERVICING NOTE Wh

17、en repairing this device with the power on, if you remove the main board or open the upper panel assembly, this device 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 assy Main board Door open

18、/close switch (S817) Tape 4 SECTION 2 GENERAL This section is extracted from instruction manual. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. UPPER PANEL ASSY, BOTTOM PANEL ASSY REMOVAL rThe equipment can

19、be removed using the following procedure. Set Upper panel assy, Bottom panel assy Main board Mechanism deck SWITCH UNIT (with JOG DIAL) Power board, Switch board CLV board Optical pick-up assy, REC board Battery case assy 7 3 1 Screws(M1.4 precision pan) Upper panel assy 2 Knob (Open) 4 Screws(M1.4

20、precision pan) 6 Screw(M1.4 precision pan) 5 Screws(M1.4 precision pan) Bottom panel assy 21 3-3. MECHANISM DECK (MT-MZR50-143) REMOVAL 3-2. MAIN BOARD REMOVAL 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 boar

21、d CN501) 4 JOG unit flexible board(Main board CN904) 6 MD frexible board(Main board CN502) 2 Screw (HP) Main board 3 Mechanism deck 1 Screws (Damper) 2 Remove the damper (snap) retaining ring section. 22 3-4. OPTICAL PICK-UP ASSY, REC BOARD REMOVAL 3-5. CLV BOARD REMOVAL 3 6 Optical pick-up assy 2 S

22、crews(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 deck 23 3-6. BATTERY CASE ASSY REMOVAL 3-7. POWER BOARD, SWITCH BOARD REMOVAL 3 3 4 1 Battery case assy Chassis (Main) assy 2 Screws(M1.4 precision pan

23、) 5 4 4 3 Remove solder 2 Remove solder Power board Switch board Battery case assy 1 Screws(M1.4 toothed lock) 24 3-8. SWITCH UNIT (WITH JOG DIAL) REMOVAL 3 5 2 Switch unit (with JOG dial) Ornamental belt assy 4 Screws (1.7) 1 Screw(Precision) Chassis (Main) assy Holder (dial) 25 SECTION 4 TEST MODE

24、 Operations When Test Mode is Set When the test mode is set, the LCD will display as follows. The LCD performs the following repeatedly. ROM version displayed / all lit / all off The display can be held and checked by pressing P key. The self-diagnostic display appears while the DISPLAY key is press

25、ed. Structure of Test Mode The test mode of this unit consists of the following five modes. In modes other than the general adjustment mode, the last two digits of the mode number will be displayed at the 00 section. Outline The general adjustment mode of this unit performs CD and MO adjustments aut

26、omatically when set. In this mode, the disc is de- termined if CD or MO and adjustments are automatically per- formed in order. If errors are detected , the faulty locations are displayed. The servo mode performs each adjustment automati- cally. Setting the Test Mode Short-circuit the soldering brid

27、ge of TAP803 (TEST) on the main board (connect Pin of IC801 to the GND) and turn on the power supply. MAIN BOARD (SIDE B) Exiting the Test Mode Turn off the power supply and open the soldering bridge of TAP803 (TEST) on the main board. 25 100 26 1 IC801 C315 TAP803 (TEST) TAP803 (Test mode) Short :

28、Test mode Open : Normal mode Self-diagnostic display (displayed while the DISPLAY key is pressed) Segment section Dot section ROM version displayed 00 Ver 01.00 p key + key VOLUME +key or key Display when Test Mode is Set = keyServo Mode Segment Section : 00 Dot Section : SERVOAudio Mode Segment Sec

29、tion : 00 Dot Section : AUDIOPower Mode Segment Section : 00 Dot Section : POWER General Adjustment Mode Segment Section : 4000 Dot Section : Assy MODEMecha Mode Segment Section : 00 00 Dot Section : MECHA Select dial number (blinks) 26 Servo Mode Set the test mode, press the + key, and set the serv

30、o mode using the VOLUME + 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. To set other modes, refer to “ Structure of Test Mode ”. Structure of Servo Mode key p key p key key VOLUME +key or key VOL

31、UME +key or key Mode : 000 Servo mode M Mode : 010 Offset compensation value displyed M Mode : 011 VC offset compensation 1 (To page 27) p key key M Mode : 020 Laser power adjustment p key key M Mode : 012 FE offset compensation key p key M Mode : 013 APC offset compensation key p key M Mode : 014 A

32、BCD offset compensation key p key M Mode : 015 All servo ON key p key p key M Mode : 021 Laser MO read adjustment key p key key M Mode : 030 MO playback recording adjustment p key M Mode : 031 MO focus search ON key p key M Mode : 022 Laser MO write adjustment key M Mode : 016 Temperature display ke

33、y VOLUME +keyor key VOLUME +key or key 2 3 4 5 p key VOLUME +key or key VOLUME +key or key M Mode : 032 MO playback EF balance adjustment p key key key M Mode : 040 Low reflection CD playback adjustment p key key M Mode : 033 MO playback ABCD level adjustment key p key M Mode : 034 MO recording EF b

34、alance adjustment key p key M Mode : 035 MO recording ABCD level adjustment key p key M Mode : 036 Laser MO read adjustment key key p key M Mode : 038 MO tracking gain adjustment key p key M Mode : 039 MO focus bias variable (Cluster Display) p key p key M Mode : 041 Low reflection CD focus serch ON

35、 p key Mode : 042 Low reflection CD EF balance adjustment key p key Mode : 043 Low reflection CD ABCD level adjustment key p key Mode : 044 Laser Low reflection CD read adjustment key p key Mode : 045 Low reflection CD focus gain adjustment key M Mode : 037 MO focus gain adjustment key 2 3 4 5 6 7 8

36、 9 *1 *1:+ key:= key *2:REC key *2 *2 *2 *2 *1 *1 (To page 27) (To page 27) (To page 27) 27 Adjusting Method Note : There is basically no display for individual adjustment items. Only such upper position titles as SERVO, AUDIO, etc. (100s position) are displayed. 1. When the adjustment modes are set

37、 according to “Structure of Servo Mode”, the last two digits of the mode number and the adjustment value written in the EEPROM will be displayed blink- ing. 2. When the P key is pressed, the following will be displayed and adjustments will be performed automatically. Note : The adjustment value can

38、be changed as desired using the VOLUME + and keys, but try to avoid this as much as possible. 3. After the adjustments are completed, the item is displayed again and the adjustment value that was blinking lights up. Cluster Display Nothing is performed at mode numbers 070 to 073. p key VOLUME +key o

39、r key VOLUME +key or key VOLUME +key or key M Mode : 046 Low reflection CD tracking gain adjustment p key key M Mode : 050 CD playback adjustment key p key Mode : 047 Low reflection CD focus bias variable (Cluster Display) M Mode : 051 CD focus search ON key p key p key Mode : 052 CD EF balance adju

40、stment key p key Mode : 053 CD ABC level adjustment key p key Mode : 054 Laser CD read adjustment key p key Mode : 055 CD focus gain adjustment key key 6 7 8 9 *1:+ key:= key *1 (To page 26) p key key Mode : 060 Full REC p key Mode : 056 CD tracking gain adjustment key key p key Mode : 057 CD focus

41、bias adjustment (Cluster Display) p key Mode : 061 32 cluster full REC (Cluster Display) key Mode : 062 REC shock (Cluster Display) key p key p key Mode : 063 32 cluster PLAY (Cluster Display) key *2 *2:REC key 1 Mode No. (Last 2 digits) Adjustment value (Blinks) Display of item 52 09 Mode No. (Last

42、 2 digits) Adjustment value (Blinks) Automatic adjustment being performed 52 09 AUTO_ADJ Mode No. (Last 2 digits) Adjustment value (Lights) Display of item 52 08 Mode No. (Last 2 digits) Adjustment value (Blinks) BLOCK error rate 52 09 026 4B 01 AT error rate Cluster value 28 Audio Mode Set the test

43、 mode, press the + key, and set the audio mode using the VOLUME + and keys. To set other modes, refer to “Structure of Test Mode”. Structuer of Audio 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 Audio playback test M Mode : 111

44、L&R 1kHz 0dB p key key M Mode : 120 Audio recording test p key key M Mode : 112 L 1kHz 0dB R- key p key M Mode : 113 L- R 1kHz 0dB key p key M Mode : 114 L&R- p key Mode : 121 Manual recording (LINE, MIC) key p key Mode : 122 DEMP Manual recording (LINE, MIC) key p key Mode : 123 AGC recording (LINE

45、, OPT, MIC) key key p key Mode : 124 DEMP AGC recording (LINE, OPT, MIC) p key key M Mode : 130 Digital AGC adjustment 1 p key M Mode : 131 MIC UP SR key p key M Mode : 132 MIC DOWN SR key key p key M Mode : 133 MIC THDO key 1 2 3 4 5 REC key REC key VOLUME +key or key VOLUME +key or key p key key M

46、 Mode : 140 Digital AGC Adjustment 2 p key M Mode : 134 MIC GAIN key p key M Mode : 135 MIC ATTACK key p key M Mode : 136 MIC RECOVER key p key M Mode : 137 MIC THD2 key p key M Mode : 138 MIC GAIN 2 key p key Mode : 141 LINE UP SR key p key Mode : 142 LINE DOWN SR key p key Mode : 143 LINE THD0 key p ke