Benutzeranleitung / Produktwartung MZ-R700 des Produzenten Sony
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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 pl.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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 .
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.
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.
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.
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).
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.
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).
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)– .
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.
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).
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 .
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.
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.
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.
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.
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 t.
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.
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 volt.
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 sig.
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 Co.
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).
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.
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 .
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 .
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 Q.
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.
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.
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.
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.
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.
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 .
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 INM.
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 .
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.
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 .
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.
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.
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.
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.
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 Q.
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.
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.
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.
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