Manuale d’uso / di manutenzione del prodotto MZ-R900 del fabbricante Sony
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SERVICE MANUAL Audio pla ying system MiniDisc digi tal audio syste m Laser diode proper ties Material: GaAlAs W a ve lengt h: λ = 790 nm Emission durati on: continuous Laser output : less th an 44.6 µ W (This ou t put is the v alue me asured at a d i stanc e of 200 mm from the le ns surfac e on th e optic al pick-up b lock with 7 m m apertur e.
2 MZ-R900 T ABLE OF CONTENTS 1. SER VICING NOTES ............................................... 3 2. GENERAL ................................................................... 4 3. DISASSEMBL Y 3-1. Disassembly Flow .................................
3 MZ-R900 NO TES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suf fer electro- static break-do wn because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body .
4 MZ-R900 SECTION 2 GENERAL This section is e xtracted from instruction manual. 8 Looking at controls See pages in ( ) for more details. The recor der A END SEARCH bu tton (17) (47) B Battery compartm.
5 MZ-R900 • This set can be disassembled in the order sho wn below . 3-1. DISASSEMBL Y FLO W SECTION 3 DISASSEMBL Y Note: Follo w the disassembly procedure in the numerical order giv en. 3-2. P ANEL ASSY , BO TT OM 3-2. P ANEL ASSY , BO TT OM 3-3. P ANEL ASSY , UPPER SECTION SET 3-4.
6 MZ-R900 3-3. P ANEL ASSY , UPPER SECTION 3-4. “LCD MODULE”, “P ANEL ASSY , UPPER” 3 two screws (1.4) 4 panel assy, upper section 2 Push button (open).
7 MZ-R900 3-5. MAIN BO ARD ASSY 3-6. “CASE ASSY , B A TTER Y”, “MAIN BO ARD” 3 four screws (M1.4 toothed lock) 4 screw (1.4) 2 flexible board (CN502) 1 Remove two solder s of flexible board. 6 flexible board (CN501) 5 7 main board assy 2 case assy, battery 3 main board 1 Remove the solder of terminal (minus).
8 MZ-R900 3-7. STRIP , ORNAMENT AL 3-8. “MD MECHANISM DECK (MT -MZR900-171)”, “CHASSIS ASSY , SET” ) ) ) ) @ @ 4 two convex portions pointed with @ 3 three bosses 5 Remove the “ strip, ornamental ” in the direction of arrow C . 2 Open toward the direction B to disengage two bosses and convex portions pointed with * .
9 MZ-R900 3-9. SER VICE ASSY , OP (LCX-4R) 0 bearing (N) 5 screw 4 spring (S), rack 3 screw (M1.4) 1 washer (0.8-2.5) 2 gear (SA) 6 screw (M1.4) 7 spring, thrust 9 Pull off “ screw, lead ” 8 over .
10 MZ-R900 3-10. HOLDER ASSY 3-11. MO T OR FLEXIBLE BO ARD 2 Push the convex portion toward the direction B and open the holder assy toward the direction A to erect uprightly. 3 Remove the concave portion in the direction of arrow C . 5 Remove the holder assy in the direction of arrow D .
11 MZ-R900 5 motor, DC (spindle) (M601) 4 three screws (M1.4) 1 Remove six solders of motor flexible board. qa motor, DC (over write head up/down) (M603) 6 two screws (M1.4) qs chassis assy, gear 9 screw (M1.2) 0 gear (HA) gear (HA) chassis assy, gear 2.
12 MZ-R900 888 003 V1.000 Microcomputer version display Destination code 002 : Except US, Canadian models 003 : US, Canadian models All off All lit BASS12 C830 + L801 C809 + C813 C801 11 12 241 5 10 4.
13 MZ-R900 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. Howe ver , the Manual mode is used to clear the memory , po wer supply adjustment, and laser power c heck before performing automatic adjustments in the Overall Adjustment mode.
14 MZ-R900 Self-Diagnosis Result Displa y Mode This set uses the self-diagnostic function system in which if an error occurred during the recording or playing, the mechanism control block and the po wer supply control block in the microcomputer detect it and record its cause as history in the non vola tile memory .
15 MZ-R900 • Description of Indication History Histor y code number Description 1 The f irst error N The last error N1 One error before the last. N2 T wo errors before the last. R_ T otal recording time Reset the error displa y code After servicing, reset the error display code.
16 MZ-R900 4. When all the keys on the set and on the remote commander are considered as OK, the following displa ys are shown for 4 sec- onds. Example1: W hen the keys on the set are considered as OK: Example2: When the ke ys on the remote commander are con- sidered as OK: 5.
17 MZ-R900 • Setting method of NV reset 1. Select the manual mode of the test mode, and set item number 021NV Reset (see page 13). 2. Press the X key . 3. Press the X key once more. 4. Press the x ke y to quit the manual mode, and activ ate the test mode (display check mode).
18 MZ-R900 • Adjustment method of Vc PWM Duty (L) (item number: 762) 1. Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL - -] key (voltage do wn) so that the v oltage becomes 2.40 V . 2. Press the X key to write the adjusted v alue .
19 MZ-R900 7. Press the N key , and set the laser CD read adjustment mode (item number 012). 8. Check that the laser po wer meter reading is 0.97 ± 0.10 mW . 9. Check that the voltage both ends (TP (+) and TP ( – )) of resistor R521 at this time is belo w 44 mV .
20 MZ-R900 > key . key Overall adjustment mode (Title display) CD overall adjusting CD overall adjustment OK MO overall adjusting MO overall adjustment OK CD overall adjustment NG MO overall adjust.
21 MZ-R900 8. If OK through the overall MO adjustments, press the x key to return to the test mode and terminate the Overall Adjustment mode. 6. Insert MO disc in the set, and press the > key to set the Overall MO Adjustment mode. Automatic adjustments are made.
22 MZ-R900 Resume Clear Perform the Resume clear when all adjustments completed. • Resume Clear Setting Method 1. Select the manual mode of the test mode, and set item number 043 (see page 13). 2. Press the X key . 3. Press the x key to r eturn to the test mode (display check mode).
23 MZ-R900 34. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue do wn) so that the adjusted v alue becomes 20. 35. Press the X key .
24 MZ-R900 23. Press the [VOL+] ke y once to change the blinking portion to 0D65. 24. Press the x key . (00 is blinking) 25. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue down) so that the adjusted v alue becomes 1C.
25 MZ-R900 023 0D6909 Remote commander LCD display 09 :Adjusted value 023 0D6CF6 Remote commander LCD display F6 :Adjusted value 023 0D6D00 Remote commander LCD display 00 :Adjusted value 023 0D6D1C R.
26 MZ-R900 023 0D7603 Remote commander LCD display 03 :Adjusted value 023 0D7800 Remote commander LCD display 00 :Adjusted value 023 0D7801 Remote commander LCD display 01 :Adjusted value 023 0D7900 R.
MZ-R900 27 27 SECTION 6 DIA GRAMS 6-1. BLOCK DIA GRAM – SER V O Section – 33 29 28 41 42 1 44 21 31 26 25 43 24 23 4 8 9 10 11 12 14 5 6 13 7 18 19 JX JY JX IX IY IY IX JX JY A B C D MON IX A B CD.
MZ-R900 28 28 6-2. BLOCK DIA GRAM – AUDIO Section – VC B+ F801 F RMC KEY RVDD DTCK CDWM 2V CDWM DA T A KEY -R RGND (LINE IN JACK) OPTICAL RECEIVER J302 i /LINE OUT J301 LINE IN (OPT) J303 MIC (PLU.
MZ-R900 29 29 29 29 29 29 7 4 56 52 54 55 1 2 3 5 20 86 169 236 235 234 17 18 19 6 10 49 24 25 39 44 38 42 40 41 35 22 23 26 46 47 50 28 32 34 11 14 10 15 22 16 19 20 51 54 55 21 8 9 26 49 47 46 45 43.
MZ-R900 29 29 29 29 29 29 7 4 56 52 54 55 1 2 3 5 20 86 169 236 235 234 17 18 19 6 10 49 24 25 39 44 38 42 40 41 35 22 23 26 46 47 50 28 32 34 11 14 10 15 22 16 19 20 51 54 55 21 8 9 26 49 47 46 45 43.
MZ-R900 30 30 30 30 30 30 R831 C808 C807 R806 C804 R807 C835 R619 R607 C834 C613 C619 R610 R606 C629 C630 R809 R808 C802 C812 C818 R817 C814 R814 R845 R840 R838 R812 R810 R802 R803 R801 C621 R613 R837.
MZ-R900 31 31 31 31 31 31 6-5. SCHEMA TIC DIA GRAM • See page 33 for Wavef orms. • See page 43 for IC Bloc k Diagrams.
MZ-R900 32 32 32 32 32 32 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 54 55 56 1 53 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 23 25 26 27 28 VB BATM CHGSW R.
MZ-R900 32 32 32 32 32 32 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 54 55 56 1 53 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 23 25 26 27 28 VB BATM CHGSW R.
33 MZ-R900 6-6. IC PIN FUNCTION DESCRIPTION • IC501 SN761057DBT (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin Name I/O Description 1 TE O Tracking error signal output to the system controller (IC80.
34 MZ-R900 • IC801 CXD2671-202GA (SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM) Pin No. Pin Name I/O Description 1 PAUSE KEY I Set key input terminal ( X key input) 2 MIC SENSE O Contr.
35 MZ-R900 Pin No. Pin Name I/O Description 47 FE I Focus error signal input from RF amp (IC501) 48 AUX1 I Support signal (I 3 signal/temperature signal) input terminal (A/D input) 49 VC I Middle point voltage (+1.
36 MZ-R900 Pin No. Pin Name I/O Description 91 DSPVDD2 — Power supply terminal (for DSP block) (+1.5V) 92 DSPVSS1 — Ground terminal (for DSP block) 93 SPCU I Spindle motor drive comparison signal .
37 MZ-R900 Pin No. Pin Name I/O Description 156, 157 TEST1, TEST0 I Input terminal for the main test (normally fixed at “ L ” ) 158 EVA I EVA/FLASH chip discrimination terminal “ L ” : FLASH c.
38 MZ-R900 Pin No. Pin Name I/O Description 204 XPD ADA O Power supply control signal output for the drive to A/D, D/A converter (IC301) 205 XCS LCD O Chip select signal output to the liquid crystal d.
39 MZ-R900 7-1. P ANEL SECTION SECTION 7 EXPLODED VIEWS • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • The mechanical parts with no reference num- ber in the exploded vie ws are not supplied.
40 MZ-R900 7-2. CHASSIS SECTION Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MT-MZR900-171 not supplied 51 52 53 73 71 54 60 68 70 53 58 56 72 55 55 57 59 61 63 62 74 51 3-220-477-01 SHEET (MD), INSULA TING 52 X-3379-320-5 CHASSIS ASSY , SET 53 4-218-233-07 SCREW (1.
41 MZ-R900 7-3. MD MECHANISM DECK SECTION (MT -MZR900-171) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark M603 M601 M602 not supplied 101 102 105 106 107 108 109 115 122 121.
42 MZ-R900 SECTION 8 ELECTRICAL P ARTS LIST Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MAIN NO TE: • Due to standardization, replacements in the parts list may be different from the parts speci- fied in the diagrams or the components used on the set.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 43 MZ-R900 MAIN C519 1-164-940-11 CERAMIC CHIP 0.0033uF 10% 16V C521 1-125-777-11 CERAMIC CHIP 0.1uF 10% 10V C522 1-125-777-11 CERAMIC CHIP 0.1uF 10% 10V C523 1-125-837-11 CERAMIC CHIP 1uF 10% 6.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 44 MZ-R900 MAIN @ Replacement of CXD2671-203GA (IC801) used in this set requires a special tool.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 45 MZ-R900 MAIN R606 1-218-949-11 RES-CHIP 470 5% 1/16W R607 1-218-945-11 RES-CHIP 220 5% 1/16W R608 1-218-983-11 RES-CHIP 330K 5% 1/16W R609 1-219-724-11 MET AL CHIP 1 1% 1/4W R610 1-218-990-11 SHORT 0 R611 1-218-990-11 SHORT 0 R613 1-218-957-11 RES-CHIP 2.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 46 MZ-R900 1-476-395-11 REMOTE CONTROL UNIT (RM-MC11EL) 0 1-476-275-11 ADAPTOR, AC (AC-MZR55) (AEP , E13, FR, EE) 0 1-476-277-.
47 MZ-R900 MEMO.
MZ-R900 REVISION HIST OR Y Clicking the ver sion allows y ou to jump to the re vised page. Also, clicking the v ersion at the upper right on the re vised page allo ws you to jump to the ne xt re vised page. V er . Date Description of Revision 1.2 2001.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Sony MZ-R900 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Sony MZ-R900 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Sony MZ-R900 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Sony MZ-R900 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Sony MZ-R900, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Sony MZ-R900.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Sony MZ-R900. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Sony MZ-R900 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
