sony_MZ-R50_service_manual 维修电路图.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 MachanismNEW MD Machanism TypeMT-MZR-50-143 Optical Pick-up TypeKMS-280A US and foreign parts licensed Dolby Laboratori

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

3、l 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 Sampli

4、ng 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 Inputs Mic

5、rophone: 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 Power requi

6、rements 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 rechargeable batt

7、ery LIP-8 (supplied) Two LR6 (size AA) alkaline batteries (not supplied) Continued on page 2 收音机爱好者资料库 Ra d i o Fa n s .CN 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 Remov

8、al . 21 3-3. Mechanism 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.DIAGR

9、AMS 6-1. Explanation 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 VIE

10、WS 7-1. Upper 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

11、SCURIT 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

12、ARE CRITICAL 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

13、 the same 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

14、CONTENTS 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 BatteriesRecordingPlayback LIP-8 lithium ionApprox.Approx. Rechargeable battery4

15、 hours7 hours Two LR6 (size AA)Approx. Sony alkaline dry batteries12 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 lith

16、ium 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. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 S

17、ECTION 1 SERVICING NOTE When 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

18、 assy Main board Door open/close switch (S817) Tape 收音机爱好者资料库 Ra d i o Fa n s .CN 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 P

19、ANEL ASSY, BOTTOM PANEL ASSY REMOVAL r The equipment can be removed using the following procedure. SetUpper panel assy, Bottom panel assyMain boardMechanism 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 preci

20、sion pan) Upper panel assy 2 Knob (Open) 4 Screws (M1.4 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 cabl

21、e (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 Mechanism deck 1 Screws (Damper) 2 Remove the damper (snap) retaining ring section. 22 3-4. OPTICAL PICK-UP ASSY, REC BO

22、ARD REMOVAL 3-5. CLV BOARD REMOVAL 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 deck 23 3-6. BATTERY CASE ASSY REMOVAL 3-7. POWER BOARD, SWITCH BOARD REMOVAL 3 3 4 1

23、Battery case assy Chassis (Main) assy 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) 24 3-8. SWITCH UNIT (WITH JOG DIAL) REMOVAL 35 2 Switch unit (with JOG dial) Ornamental belt assy 4 Screws (1.7) 1 Screw (

24、Precision) Chassis (Main) assy Holder (dial) 25 SECTION 4 TEST MODE 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.

25、 The self-diagnostic display appears while the DISPLAY key is pressed. 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 gene

26、ral adjustment mode of this unit performs CD and MO adjustments automatically 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 auto

27、mati- cally. Setting the Test Mode Short-circuit the soldering bridge 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 boar

28、d. 25 100 26 1 IC801 C315 TAP803 (TEST) TAP803 (Test mode) Short : Test mode Open : Normal mode Self-diagnostic display (displayed while the DISPLAY key is pressed) Segment section Dot section ROM version displayed 00 Ver01.00 p key + key VOLUME +key or key Display when Test Mode is Set = key Servo

29、Mode Segment Section : 00 Dot Section : SERVO Audio Mode Segment Section : 00 Dot Section : AUDIO Power Mode Segment Section : 00 Dot Section : POWER General Adjustment Mode Segment Section : 4000 Dot Section : Assy MODE Mecha Mode Segment Section : 00 00 Dot Section : MECHA Select dial number (blin

30、ks) 26 Servo Mode Set the test mode, press the + key, and set the servo 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

31、 ”. Structure of Servo Mode ” key p key p key ” key VOLUME +key or keyVOLUME +key or key Mode : 000 Servo mode ? Mode : 010 Offset compensation value displyed ? Mode : 011 VC offset compensation 1 (To page 27) p key ” key ? Mode : 020 Laser power adjustment p key ” key ? Mode : 012 FE offset compens

32、ation ” key p key ? Mode : 013 APC offset compensation ” key p key ? Mode : 014 ABCD offset compensation ” key p key ? Mode : 015 All servo ON ” key p key p key ? Mode : 021 Laser MO read adjustment ” key p key ” key ? Mode : 030 MO playback recording adjustment p key ? Mode : 031 MO focus search ON

33、 ” key p key ? Mode : 022 Laser MO write adjustment ” key ? Mode : 016 Temperature display ” key VOLUME +key or key VOLUME +key or key 2?3? 4?5 p key VOLUME +key or keyVOLUME +key or key ? Mode : 032 MO playback EF balance adjustment p key ” key ” key ? Mode : 040 Low reflection CD playback adjustme

34、nt p key ” key ? Mode : 033 MO playback ABCD level adjustment ” key p key ? Mode : 034 MO recording EF balance adjustment ” key p key ? Mode : 035 MO recording ABCD level adjustment ” key p key ? Mode : 036 Laser MO read adjustment ” key ” key p key ? Mode : 038 MO tracking gain adjustment ” key p k

35、ey ? Mode : 039 MO focus bias variable (Cluster Display) p key p key ? Mode : 041 Low reflection CD focus serch ON 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 ”

36、key p key Mode : 045 Low reflection CD focus gain adjustment ” key ? Mode : 037 MO focus gain adjustment ” key 2?3? 4?5 6?7? 8?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 ite

37、ms. Only such upper position titles as SERVO, AUDIO, 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 EEPROM will be displayed blink- ing. 2. When the P key

38、is pressed, the following will be displayed and adjustments will be performed automatically. Note : The adjustment value can 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 adjus

39、tment value that was blinking lights up. Cluster Display Nothing is performed at mode numbers 070 to 073. p key VOLUME +key or keyVOLUME +key or keyVOLUME +key or key ? Mode : 046 Low reflection CD tracking gain adjustment p key ” key ? Mode : 050 CD playback adjustment ” key p key Mode : 047 Low re

40、flection CD focus bias variable (Cluster Display) ? Mode : 051 CD focus search ON ” key p key p key Mode : 052 CD EF balance adjustment ” 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

41、*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 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 Mo

42、de : 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 2 digits) Adjustment value (Blinks) Automatic adjustment being performed 52 09 AUTO_ADJ Mode No. (Last 2 digits) Adjustment value (Lights) Display

43、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 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 Audi

44、o Mode ” key p key p key ” key VOLUME +key or key VOLUME +key or key VOLUME +key or key Mode : 100 Audio mode ? Mode : 110 Audio playback test ? Mode : 111 L&R 1kHz 0dB p key ” key ? Mode : 120 Audio recording test p key ” key ? Mode : 112 L 1kHz 0dB R- ” key p key ? Mode : 113 L- R 1kHz 0dB ” key p

45、 key ? 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, OPT, MIC) ” key ” key p key Mode : 124 DEMP AGC recording (LINE, OPT, MIC) p key ” key ? Mode : 130 Digital AGC adjustment 1 p key

46、 ? Mode : 131 MIC UP SR ” key p key ? Mode : 132 MIC DOWN SR ” key ” key p key ? Mode : 133 MIC THDO ” key 1?2? 3?4?5 REC keyREC key VOLUME +key or keyVOLUME +key or key p key ” key ? Mode : 140 Digital AGC Adjustment 2 p key ? Mode : 134 MIC GAIN ” key p key ? Mode : 135 MIC ATTACK ” key p key ? Mode : 136 MIC RECOVER ” key p key ? Mode : 137 MIC THD2 ” key p key ? 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