Kenwood DM 3090 Service Manual

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If a problem occurs If this product is subjected to strong external interference (mechanical shock, excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is operated incorrectly, it may malfunction or the display may not function correctly. If such a problem occurs, do the following: -Unplug the AC power lead from the AC socket. -Wait about 20 - 30 seconds and then plug the AC power lead back into the AC socket. -Press the reset key on the back of the unit. -When the reset key is pressed, all of the settings in memory will be erased. RLRLPLAY OUTREC IN DIGITAL LINE 2REC IN1REC IN PLAY OUTOPT. RESET RESET Beware of condensation When water vapor comes into contact with the surface of cold material, water drops are produced. If condensation occurs, correct operation may not be possible, or the unit may not function correctly. This is not a malfunction, however, and the unit should be dried. (To do this, turn the POWER switch ON and leave the unit as it is for several hours.) Be especially careful in the following conditions: -When the unit is brought from a cold place to a warm place and there is a large temperature difference. -When a heater starts operating. -When the unit is brought from an air-conditioned place to a place of high temperature with high humidity. -When there is a large difference between the internal temperature of the unit and the ambient temperature, or in conditions where condensation occurs easily. 6 1 9 +10 23 45 78 0 Remote control unit (1) (A70-1208-08) Battery cover (A09-0337-08)Audio cord (2) (E30-0505-05)Optical fiber cable (1) (B19-1529-05) Batteries (2) DM-3090 2 CONTENTS/ACCESSORIES/CAUTIONS CONTENTS/ACCESSORIES/CAUTIONS...................2 CONTROLS.................................................................3 DISASSEMBLY FOR REPAIR.....................................5 BLOCK DIAGRAM.......................................................7 CIRCUIT DESCRIPTION.............................................9 TROUBLE SHOOTING..............................................16ADJUSTMENT...........................................................24 PC BOARD...............................................................32 SCHEMATIC DIAGRAM...........................................37 EXPLODED VIEW.....................................................47 PARTS LIST...............................................................49 SPECIFICATIONS.......................................Back cover CONTENTS Accessories Cautions DM-3090(K) COVER 97.11.29 0:18 AM y[W 3

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Names and functions of parts MULTI CONTROL TIME DISPLAY DISPLAY/CHARAC. TRACK/EDIT ON/STAND BY STEREO MINIDISC RECORDER TIMER/ DELETEENTER REC REC LEVEL 010 PHONES LEVEL MINMAX PHONES 1 2 3 4 5 6 7 8 9 0 ! @ # $ % ^ 1Eject key: 2Power switch (ON/STAND BY key) 3Mini Disc Insertion slot 4TIME DISPLAY key 5DISPLAY/CHARAC key 6TRACK/EDIT key 7TIMER/DELETE key 8Jog dial (Next/Previous)9ENTER key 0Headphone jack (HONES) !Headphone output level control @Record level control #Record key: $Play/Pause key: %Stop key: ^Cue/Review key: / -¥ TOCDISC TOTALREMAIN RANDOM TIMER RECCLOCK TRACK DATE0dBOVER 124 MONO LPPRGM 1815 2916 31017 41118 51219 61320 714 1 2 3 4 5 6 7 8 9 0 ! @ # $ % ^ & * ( 1 Pause indicator: 2 Record indicator: 3 Play indicator: 4 Monaural Long-Play Mode indicator 5 Programme indicator 6 Repeat indicator: 7 Total Time/Remaining Time indicator 8 Random indicator 9 Timer Playback/Timer Recording indicator 0 Clock indicator! Music Calendar @ More Tracks indicator # Recording Level indicator $ Recording level too high indicator % Level Meter/Character Information display ^ Date indicator & Track indicator * Disc Name indicator ) TOC Indicator: TOC Front panel Display Display DM-3090 3 CONTROLS DM-3090(K) COVER 97.11.29 0:18 AM y[W 6

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How to remove the sled motor/loading motor (See Fig. 11-1) 1. Remove the screws (D1) x 1 pcs., and remove the sled motor/loading motor. Caution: Be careful so that the gear is not damaged. (The damaged gear emits noise during searching.) Figure 11-1 Figure 11-2 Figure 11-3 How to remove the spindle motor (See Fig. 11-2) 1. Remove the screws (E1) x 3 pcs., and remove the spidle motor. Caution: Be careful so that the turntable is not damaged. How to remove the optical pickup (See Fig. 11-3) 1. Remove the screws (F1) x 3 pcs. Caution: Be careful so that the gear is not damaged. (The damaged gear emits noise during searching.) Sled Motor Loading Motor(D1)x2 Ø1.7x2mm(D1)x2 Ø1.7x2mm Spindle Motor Turntable (E1)x3 Ø1.7x2.5mm Optical Pickup (F1)x3 Ø1.7x9.5mm DM-3090 6 DISASSEMBLY FOR REPAIR DM-3090(K) COVER 97.11.29 0:18 AM y[W 11

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DM-3090 31 PARTS DESCRIPTIONS DM-3090(K) COVER 97.11.29 0:19 AM y[W 24

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UWY VX IC1601 DM-3090 (1/2) A B Q1451 Q1821 Q1822Q1801 Q1802 Q1803 5ch MOTOR DRIVERCN1902 5.1V 1.6V 2.5V 1.6V 1.6V 1.6V 1.2V 1.2V 1.7V 1.7V 1.6V 1.6V 2.1V 2.9V 2.6V 2.5V 2.6V 1.6V 2.4V 1.6V 2.6V 1.6V 1.6V 3.1V 1.6V 1.2V 3.7V 1.6V 1.6V 1.6V +B +B +B+B +B +B+B+B +B +B +B +B +BJ1950LR190 74 71 70 12 72 J1963 0JC196 22P 0 J1720 JC171 22P C1724 22P R1708 6.8K 68P C1917 47 22 0 R1952 47 R1940 220R1995 0 R1994 R1951 0R1759 1K R1758 1K J1730 0 + C1661 100u10 L1601 1uH2.2 C18011.8K R1801 270 R1802 +C1802 100u10220K R1804 100K R1805 2.2 C1803 270 R1827 24 25 1 5600P C1657 10K R1664 23 28 2722 6.8K R1669 15K R16600.015 C1655C1602 1 OUT4IN4- IN4+ IN5+IN5- OUT5VM5- VM5+VM4- VM4+ VM3+VM3-IN3 Vm2 VBS2IN3- OUT3 CH3IN R1668 6.8KR1666 22K 22K R1667 C1654 0.015 R1658 15K 29 28 31 30 35 34 5600P C1656 10K R1662 0 R1620 42 41 40 39 38 37 36 NC 35 C1631 1DSCK MD-ST RESET LOAD SW BUCKUP PDOWN 1 2 3 4 14 13 12 11 10 9 8 7 6 5 15 16 17 18 19 20 21 22 23 24 R1454 R1452 R1456 47 R1947 1K R1939MUTE DFSO DFSI DADATA BCLK LRCLK ADDATA SYSCLK DVDD DVDD D.GND D.GND D.GND D.GND DSTB MODATA KDATA SERCH 5 12R1466 R1464 R1462 R1458 R1460 R1461 10K R1459 0.047 C1425 6 34 35 36 21 37R1733 1K R1953 47 1uH L1950 220 220 6.8K 6.8K 6.8K 1K 3.3K 1K R1463 10K 10K 1.25V - + GND VM2+ VM2- OUT2 VREFO VREF IN2- 21 20SS.GND 19MUTE2 18MUTE1 17IN2+ 16 15REG+ REGB IN1+ VBS1 Vm1 IN1- OUT1 VM1- VM1+ GND34 GND GND33 32 30 31 29 2/2 MAIN -CNW301 2/2 MAIN -CNP471 28 27 26 24 23 22 25 1 2 3 5 6 8 9 7 4 12 11 10 14 13 ) ( ) ( ) ( ) ( ( ) ) ( ) ( ) ( ) () ( ) ( ) ( ) () ( ( ) ( ) ) () ( ( ) ( ( ) ( ) ) ( ) ( ) ( ) ( ) Y22-7510-00 DM-3090 CAUTION: For continued safety, replace safe- ty critical components only with manufacturer's recommended parts (refer to parts list). indi- cates safety critical components. For contin- ued protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. The DC voltage is an actual reading measured with a high impedance type voltmeter. The measurement value may vary depending on the measuring instruments used or on the product. Refer to the voltage during RECORD- ABLE MD PLAY unless otherwise specified; The value shown in ( ) is the voltage mea- sured at the moment of STOP. The voltage followed by (REC) refers to the value during MD RECORDING. DM-3090(K) COVER 97.11.29 0:19 AM y[W 20