Sony MZ-R700 manuale d’uso

1 MZ-G750/R700 SERVICE MANUAL FM/AM POR T ABLE MINIDISC RECORDER Model Name Using Similar Mechanism NEW Mechanism T ype MT -MZR700-172 Optical Pick-up Name LCX-4R (Photo: MZ-G750) MD recorder Audio playing system MiniDisc digital audio system Laser diode properties Material: GaAlAs MQW W a velength: λ = 790 nm Emission duration: continuous Laser o[...]

2 Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270°C during repairing. • Do not touch the soldering iron on 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 dis[...]

3 1. SERVICING NOTE ......................................................... 4 2. GENERAL Looking at the Controls (MZ-G750) ................................... 5 Looking at the Controls (MZ-R700) ................................... 6 3. DISASSEMBL Y 3-1. Panel Assy , Lower ............................................................... 7 3-2. Pane[...]

4 MZ-G750/R700 SECTION 1 SERVICING NOTE NOTES 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 . During repair , pay attention to electrostatic br[...]

5 MZ-G750/R700 SECTION 2 GENERAL This section is extracted from instruction manual. (MZ-G750)[...]

6 MZ-G750/R700 (MZ-R700)[...]

7 MZ-G750/R700 Set Panel Assy,Lower Panel Assy, Upper LCD Module Main Board MD Mechanism Deck Service Assy, OP Motor Flexible Board Holder Assy Motor, DC (M602) Motor, DC (M601), Motor, DC (M603) Note : This set can be disassemble according to the following sequence. SECTION 3 DISASSEMBL Y 3-1. P ANEL ASSY , LOWER 3-2. P ANEL ASSY , UPPER Note : Fo[...]

8 MZ-G750/R700 3-3. LCD MODULE 3-4. MAIN BOARD 1 screws (1.7x2.5) 4 LCD modul e claws panel assy , upper 2 screws (1.7x2.5) 3 3 screws (M1.4x2) 6 Remov e the solders 7 9 Remov e the solde r q; case assy , batter y qs spring, batter y coil qd MAIN board qa Remov e the solder 4 screws (M1.7x3) 5 screws (M1.4x2) 1 CN502 2 arm 8 CN501[...]

9 MZ-G750/R700 3-5. MD MECHANISM DECK 3-6. SERVICE ASSY , OP 1 screws (1.4x1.6), MI 2 chassis assy , set 3 MD mechanism dec k boss boss 4 spring(s), pack 6 spring, thrust detent 3 screw(M1.4), precision pan 5 screw(M1.4), precision pan 1 washer (0.8 - 2.5) 2 gear (SA) 8 Pull off the lead screw . 7 B A 9 Opening the ov er wr ite head toward the dire[...]

10 MZ-G750/R700 3-7. HOLDER ASSY 2 Remov e two solders of DC motor (ov er wr ite head up/down) (M603). 1 Remov e four solders of DC motor (sled) (M602). 3 Remov e four solders of DC motor (spindle) (M601). DC motor (sled) circular hole 5 motor flexib le board 4 adhesive sheet Note: Align a circular hole in the str ipping paper with a circular hole [...]

11 MZ-G750/R700 4 two screws(M1.4), precision pan 5 moter , DC (sled) (M602) 3 Remov e four solders of motor flexib le board. 1 washer (0.8 - 2.5) 2 gear (SA) 1 Remov e six solders of motor flexib le board. 4 three screws(M1.4), precision pan qs moter , DC (over write head up/down) (M603) 6 two screws(M1.4), precision pan qa chassis assy , gear 0 s[...]

12 MZ-G750/R700 2 In the normal mode, turn on the [HOLD] switch. While press- ing the [VOL - -] key press the following or der: > t > t . t . t > t . t > t . t X t X SECTION 4 TEST MODE 4-3. Operation in Setting the T est Mode • When the test mode becomes acti ve, f irst the display check mode is selected. • Other mode can be select[...]

13 MZ-G750/R700 4-5. Configuration of T est Mode 4-6. Manual Mode Mode to adjust or check the operation of the set by function. Normally , the adjustment in this mode is not e xecuted. Howe ver , the Manual mode is used to clear the memory , power supply adjustment, and laser power c hec k before performing automatic adjustments in the Overall Adju[...]

14 MZ-G750/R700 4-8. Self-Diagnosis Result Display 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 w er supply control block in the microcomputer detect it and record its cause as history in the non volatile memory . By checking this history[...]

15 MZ-G750/R700 • Description of Indication History History code number Description 1 The f irst err or N The last error N1 One error before the last. N2 T wo errors before the last. R_ T otal recording time 4-9. Reset the error display code After servicing, reset the error display code. • Setting method of Reset the Error Display Code 1. Setti[...]

16 MZ-G750/R700 4-1 1. Key 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 12). 2 . Press the [T MARK] ke y for sever al seconds (about 3 seconds) acti vates the ke y check mode. (At the last two digits, AD value of remote commander ke y lin[...]

17 MZ-G750/R700 4. When all the keys on the set and on the remote commander are considered as OK, the following displays are shown for 4 sec- onds. Example1: When the keys on the set are considered as OK: Example2: When the keys on the remote commander are con- sidered as OK: 5. When all keys w er e check ed or if the upper panel is opened, the key[...]

18 MZ-G750/R700 • 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 activate the test mode (display check mode). • Change of Adjusted V alues On the set having the microcomputer [...]

19 MZ-G750/R700 • Adjustment method of Vc PWM Duty (L) (item number: 762) 1. Connect a digital voltmeter to the TP901 (VC) on the MAIN board, and adjust [VOL +] key (v oltage up) or [VOL - -] key (voltage do wn) so that the voltage becomes G750: 2.50 ± 0.01 V , R700: 2.40 ± 0.01 V . 2. Press the X key to write the adjusted v alue. (The item num[...]

20 MZ-G750/R700 2. Press the . key continuously until the optical pick-up mov es to the most inward track. 3. Open the cov er and set the laser po wer meter on the objectiv e lens of the optical pick-up. 4. Press the N key , and set the laser MO read adjustment mode (item number 011). 5. Check that the laser po wer meter reading is 0.81 ± 0.08 mW [...]

21 MZ-G750/R700 5-8. Overall Adjustment Mode • Configuration of overall adjustment Note: Adjust the CD first, when performing adjustment. Adjustment/checking and Connection Location: TP901(VC) TP912(GND) TP902(VL) R521 TP(+) TP(–) –MAIN BOARD(SIDE A)– . key > key N key N key Protect switch ON Protect switch OFF x key x key x key x key x [...]

22 MZ-G750/R700 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 ar e made. 7. In case of MO overall adjustment NG, reset the NV (see page 18), then readj[...]

23 MZ-G750/R700 5-9. 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 (displa y check mode). 5-10. Patch Data Rewriting When Nonvolatile Memory wa[...]

24 MZ-G750/R700 12. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue down) so tha t the adjusted v alue becomes 8B. 13. Press the X key . (0D5E is blinking) 14. Press the [VOL+] key once to change the blinking portion to 0D5F . 15. Press the x key . (00 is blinking) 16. Adjust with the [VOL+] key (adjusted v alue up)[...]

25 MZ-G750/R700 25. Press the X key . (0D61 is blinking) 26. Press the [VOL+] key once to change the blinking portion to 0D62. 27. Press the x key . (00 is blinking) 28. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue down) so tha t the adjusted v alue becomes 04. 29. Press the X key . (0D62 is blinking) 30. Press t[...]

26 MZ-G750/R700 12. Press the X key . (0D5E is blinking) 13. Press the [VOL+] key to change the blinking portion to 0D61. 14. Press the x key . (00 is blinking) 15. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue down) so that the adjusted v alue becomes 20. 16. Press the X key . (0D61 is blinking) 17. Press the [VO[...]

27 MZ-G750/R700 48. Press the X key . (0D6E is blinking) 49. Press the [VOL+] key to change the blinking portion to 0D72. 50. Press the x key . (00 is blinking) 51. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue down) so that the adjusted v alue becomes 05. 52. Press the X key . (0D72 is blinking) 53. Press the [VO[...]

28 MZ-G750/R700 60. Press the X key . (0D65 is blinking) 61. Press the [VOL+] key once to change the blinking portion to 0D75. 62. Press the x key . (00 is blinking) 63. Adjust with the [VOL+] key (adjusted v alue up) or [VOL- -] key (adjusted v alue down) so that the adjusted v alue becomes 1C. 64. Press the X key . (0D75 is blinking) 65. Press th[...]

29 MZ-G750/R700 SECTION 6 DIAGRAMS 6-1. IC PIN FUNCTION DESCRIPTION • IC501 SN761057DBT (RF AMP , FOCUS/TRACKING ERROR AMP) Pin No. Pin Name I/O Description 1 TE O Trac king error signal output to the system controller (IC801) 2 REXT — Connect terminal to the exter nal resistor f or ADIP amp control 3 WPPLPF — Connect terminal to the external[...]

30 MZ-G750/R700 • IC801 CXD2671-204GA (SYSTEM CONTROLLER, DIGIT AL SIGNAL PROCESSOR, 16M BIT D-RAM) Pin No. Pin Name I/O Description 1 P A USE KEY I Set key input terminal ( X key input) 2 MIC SENSE O Control signal output to the microphone amp “ H ” : HIGH, “ L ” : LO W , normally: “ H ” (Not used) 3 XTEST I Input terminal for the te[...]

31 MZ-G750/R700 Pin No. Pin Name I/O Description 52 A VD2 — Power supply terminal (for the analog) (+2.4 V) 53 A VS2 — Ground terminal (for the analog) 54 ADRB I A/D converter the lower limit voltage input (fixed at “ L ” in this set) 55 SE I Sled er ror signal input terminal Not used (f ixed at “ L ” ) 56 TE I Tracking error signal inp[...]

32 MZ-G750/R700 Pin No. Pin Name I/O Description 99 SLDW O Sled motor drive signal output (W) to the motor driver (IC551)/drive control signal output (2+) 100 SLCU I Spindle motor drive comparison signal input (U) from the motor driver (IC551) 101 SLCV I Spindle motor drive comparison signal input (V) from the motor driver (IC551) 102 SLCW I Spindl[...]

33 MZ-G750/R700 Pin No. Pin Name I/O Description 170 OPEN CLOSE SW I Open/close detection switch (S806) of the upper panel input terminal (A/D input) “ L ” : when upper panel close 171 GND SW O Control signal output to the ground (GND) changeover switch 172, 173 SET CODE0, 1 O Input terminal for the set (fixed at “ L ” in this set) 174 SET [...]

34 MZ-G750/R700 Pin No. Pin Name I/O Description 224 – 226 (XA VLS), (SOUND 1, 2) I Not used (open) 227 XHOLD SW I HOLD switch input terminal “ L ” : hold ON, “ H ” : hold OFF 228 (SYCN REC) I SYNCHRO REC switch input terminal “ L ” : OFF , “ H ” : ON Not used (open) 229 NC O Not used (open) 230 PROTECT I Detection input terminal [...]

MZ-G750/R700 35 35 33 24 81 35 25 80 TRACKING COIL DRIVE 10 19 82 8 18 83 FOCUS COIL DRIVE 14 17 42 16 233 98 SLED VOLTAGE MONITER SPINDLE SERVO DRIVE SWITCH IC805 41 12 20 97 29 26 99 MAIN BOARD (1/3) MOTOR FLEXIBLE BOARD AUTOMATIC POWER CONTROL Q501 2 19 11 12 5 8 18 14 9 10 15 16 17 7 6 1 3 19 10 9 JX JY JX IX IY Iy HR601 OVER WRITE HEAD MD MECH[...]

MZ-G750/R700 36 36 6-3. BLOCK DIAGRAM — AUDIO SECTION — 9 1 3 2 1 14 3 12 71 AUDIO I/F CONTROLLER AUDIO I/F CONTROLLER CLOCK DIVIDER OPT CONTROL SWITCH Q302 A/D CONVERTER & HPF IP GAIN AMP 29 30 215 192 191 193 183 218 240 142 22 21 15 2 4 24 23 13 11 69 2 3 4 1 219 24 25 70 17 18 MUTING BEEP BIAS STANDBY REFERENCE VOLTAGE SWITCHING Q301 10[...]

MZ-G750/R700 37 37 187 206 205 1 13 14 227 170 230 3 48 10 20 86 10 25 169 236 235 234 17 18 19 S805 (HALF LOCK) 15 21 141 164 165 8 11 39 36 12 34 32 50 33 4 7 56 54 52 55 1 3 2 5 53 5 3 4 6 8 12 15 2 13 1 10 9 11 7 14 16 MAIN BOARD (3/3) SYSTEM CONTROL/POWER SECTION SDO0 SCK0 AUDIO SECTION 3 RMC KEY AUDIO SECTION 6 X MIC DET AUDIO SECTION VC B+ V[...]

MZ-G750/R700 38 38 1 A B C D E F G H I J 23456789 1 0 1 1 1 2 1 3 1 4 OPTICAL PICK-UP BLOCK (LCX-4R) R1011 C1003 L1005 R1042 R1001 R1016 R1023 C1004 R1007 R1008 R1005 C1002 R1035 L906 L602 R609 Q603 Q1008 R840 D803 D607 R611 R610 C628 R839 R834 C801 C825 C606 R603 C605 C604 C603 C612 C632 C611 C624 C615 R814 F801 R105 C316 J302(1/2) J303 J301(1/2) [...]

MZ-G750/R700 39 39 1 A B C D E F G H I J 2 3 4 5 6 7 8 9 10 11 12 13 14 L1004 L554 MD MECHANISM SWITCH & LCD MODULE UNIT HR601 OVER WRITE HEAD L553 L1003 L1002 D201 D101 D602 D901 CN801 D903 D1001 C821 Q1001 FB803 C1007 Q1003 Q1006 C1009 C1011 C1010 C1016 C1005 C1006 C815 X801 SL801 (TEST) C809 R816 C631 R1014 C1008 R1029 C802 IC801 R802 R803 R[...]

MZ-G750/R700 40 40 Common note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 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. • % : indicates tolerance. • C : panel designation. • A : B+ Line. • T otal [...]

MZ-G750/R700 41 41 1 2 3 4 8 7 6 5 1 2 3 4 8 7 6 5 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 44 45 46 47 48 49 50 51 52 53 54 55 56 28 27 26 25 24 23 22 21 20 19 18 17 16 15 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 44 45 46 47 48 49 50 51 52 53 54 55 56 28 27 26 25 24 23 22 21[...]

MZ-G750/R700 42 42 1 2 2 184 183 181 180 179 182 178 176 175 174 177 172 171 170 163 164 165 160 161 162 159 156 157 158 155 152 153 154 151 148 149 150 147 144 145 146 141 142 143 140 137 138 139 134 135 136 133 130 131 132 127 128 129 126 123 124 125 173 168 167 166 169 186 185 187 189 188 190 192 191 193 195 194 196 198 197 199 201 200 202 204 2[...]

MZ-G750/R700 43 43 6-8. SCHEMA TIC DIAGRAM — MAIN SECTION (3/3) — • Refer to page 44 for IC Block Diagrams. 3 2 1 4 5 1 1 2 3 1 2 3 1 3 2 19 20 21 22 23 24 12 11 10 9 8 7 1 2 3 4 6 5 18 17 16 15 13 14 1 4 5 2 3 2 3 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 8 9 10 11 12 13 14 7 6 5 4 3 2 1 4 5 2 IC B/D IC B/D IC B/D IC B/D IC B/D IC B/D IC B/D Ex[...]

MZ-G750/R700 44 44 • IC BLOCK DIAGRAMS IC501 SN761057DBT 1 TE REXT Wpp LPF VREF C D D-C Iy Ix Jx Jy A A-C B ADIP-IN FE ABCD OFC-1 OFC-2 PS LP EQ AGND RF OUT CCSL2 VC XRST SCK SBUS VREF075 PEAK BOTM DGND OFTRK S-MON TON-C CIG CDN ADIP DVDD PD-I PD-NI PD-O 43 44 TWpp PK/BTM Aw CSLO VREF075 A-C D-C Malfa Mij AwBPF Dw DwBPF 42 39 AVCC 38 37 36 35 34 [...]

45 MZ-G750/R700 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 RS INP2 INM2 RF2 DCIN CHGMON SVREF GAIN CHG DREG GND SW RECON OE CLK RI FI EFM VIO VC V RECO1 LI 1 PGND1 PGND1 LI 2 VRECO2 VREC DTC INP1 INM1 RF1 DW TP DW BT CVR[...]

46 MZ-G750/R700 V REF MT SW BST SW BEEP 19 20 21 22 23 24 18 17 16 15 14 13 PW SW 12 11 10 8 7 BST1 9 BST2 6 5 4 3 2 1 BST AGC PW B PW A ADD TCMT VCC IN R IN L OUTB OUTA +B OUT L PW GND OUT R DET AGC IN BST NF2 LPF2 NF1 LPF1 VREF VREF IN GND BEEP BST SW MUTE STB BEEP BEEP 1 13 2 5 VCON VA SDTO BCLK MCLK LRCK CDTI CCLK CSN PDN VA RIN2 RIN1 LIN2 LIN1[...]

47 MZ-G750/R700 SECTION 7 EXPLODED VIEWS NOTE: • The mechanical parts with no reference number in the exploded views are not supplied. • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • -XX and -X mean standardized parts, so they may hav e so[...]

48 MZ-G750/R700 51 52 55 54 53 56 57 58 59 56 60 MT -MZR700-17 2 7-2. CHASSIS SECTION Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark @ 51 X-3379-555-1 CHASSIS ASSY , SET 52 3-222-779-01 SPRING (OPEN), TENSION * 53 A-3323-650-A MAIN BOARD, COMPLETE (R700:CND,AEP ,UK,E, AUS,EE,JE,FR,AR,HK,CH,TW ,KR) * 53 A-3323-652-A MAIN B[...]

49 MZ-G750/R700 M603 M601 M602 101 102 105 106 107 108 109 115 121 120 119 118 117 103 104 110 122 111 109 112 103 109 114 113 115 109 116 103 A A B B 7-3. MD MECHANISM DECK SECTION (MT -MZR700-172) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark The components identified by mark 0 or dotted line with mark 0 are critical f[...]

50 MZ-G750/R700 SECTION 8 ELECTRICAL P ARTS LIST NOTE: • Due to standardization, replacements in the parts list may be dif ferent fr om the parts specified in the diagrams or the components used on the set. • -XX and -X mean standardized parts, so they may hav e some difference from the original one. • RESISTORS All resistors are in ohms. MET[...]

51 MZ-G750/R700 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MAIN 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% 6.3V C524 1-135-259-11 T ANTAL. CHIP 10uF 20% 6.3V C527 1-119-923-11 CERAMIC CHIP 0.047uF 10% 10V C529 1-115-169-11 T ANT ALUM[...]

52 MZ-G750/R700 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark @ Replacement of CXD2671-204GA (IC801) used in this set requires a special tool. Therefore, it cannot be replaced. MAIN C1007 1-117-919-11 T ANT AL. CHIP 10uF 20% 6.3V (G750) C1008 1-117-919-11 T ANT AL. CHIP 10uF 20% 6.3V (G750) C1009 1-117-919-11 T ANT AL. C[...]

53 MZ-G750/R700 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MAIN Q302 8-729-046-49 FET FDV304P Q501 8-729-922-10 TRANSISTOR 2SA1577-QR Q601 8-729-046-45 FET SI2302DS-T1 Q602 8-729-046-44 TRANSISTOR ZDT6718T A Q603 8-729-053-71 FET TS8K1TB Q604 8-729-046-43 FET HA T2051T -EL Q605 8-729-046-42 FET HA T2050T -EL Q801 8-72[...]

54 MZ-G750/R700 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MAIN R837 1-218-990-11 SHORT 0 R839 1-208-939-11 MET AL CHIP 150K 0.5% 1/16W R840 1-216-809-11 MET AL CHIP 100 5% 1/16W R841 1-218-990-11 SHORT 0 R902 1-218-985-11 RES-CHIP 470K 5% 1/16W R903 1-218-957-11 RES-CHIP 2.2K 5% 1/16W R905 1-218-957-11 RES-CHIP 2.2K [...]

55 MZ-G750/R700 Ref. No. Part No. Description Remark The components identified by mark 0 or dotted line with mark 0 are critical for safety . Replace only with part number specified. Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié. MISCELLANEOUS *******[...]

56 MZ-G750/R700 REVISION HIST ORY Clicking the ver sion allows you to jump to the re vised page. Also, clicking the v ersion at the upper right on the revised page allo ws you to jump to the next re vised page. V er . Date Description of Revision 1.1 2001. 02 US, Canadian, E, Australian and Chinese model has been added. 1.0 2001. 01 Ne w[...]