Kenwood-RXDM37-cs-sm 电路图 维修手册.pdf

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1、COMPACT Hi-Fi COMPONENT SYSTEM RXD-M37-L/M37-S SERVICE MANUAL (HM-337) 2004-8 PRINTED IN KOREA B51-5918-00 (K/K) 339 70%70% CD cover assy (F07-2028-08) Power knob (K29-8426-08) Display/Rec knob (K29-8428-08) Search knob (K29-8430-08) Cass. Lid assy (A53-2451-08) EQ/BASS knob (K29-8427-08) Knob (K29-

2、8431-08) Volume knob (K29-8429-08) Front cab. assy * (A60-) In compliance with Federal Regulations, following are repro- duction of labels on, or inside the product relating to laser product safety. KENWOOD Corp. certifies this equipment conforms to DHHS Regulations No.21 CFR 1040. 10, Chapter 1, su

3、bchapter J. DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM. Caution : No connection of ground line if disassemble the unit. Please connect the ground line on rear panel, PCBs, Chassis and some others. * Refer to parts list on page 18. RadioFans.CN 收音机爱 好者资料库

4、 CONTENTS / ACCESSORIES / CAUTIONS.2 EXTERNAL VIEW.3 ADJUSTMENT.4 PC BOARD .8 SCHEMATIC DIAGRAM .12 EXPLODED VIEW .17 PARTS LIST.18 SPECIFICATIONS.BACK COVER CAUTION Be sure to adhere to the following, or proper ventilation will be blocked causing damage or fire hazard. Do not place any objects impa

5、iring heat radiation onto the top of the unit. Leave some space around the unit (from the largest outside dimension including projection) equal to or greater than, shown below. Back panel : 10 cm Top panel : 50 cm Channel space switching (except for the Europe and Australia) The space between radio

6、channels has been set to the one that prevails in the area to which the system is shipped. However, if the curren channel space setting does not match the setting in the area where the system is to be used, for instance when you move from area 1 or area 2 shown in the following table or vice versa,

7、proper reception of AM/FM broadcasts cannot be expected. In this case, change the channel space setting for each AM and FM broadcast in accordance with your area by referring to the following table. When the system is on, press TUNER/band button to select TUNER mode and waveband of which you wish to

8、 set the channel space. Then, while pressing 6 button, press 4 button to switch the channel space. Area U.S.A., Canada and South American countries CHANNEL Space frequency 1 2 Other countries FM: 100 kHz AM: 10 kHz FM: 50 kHz AM: 9 kHz CAUTION Place the unit where the AC power cord can be easily unp

9、lugged. The power in this unit will not be completely cut off from the AC wall outlet when the power completely, unplug the AC power cord from the AC wall outlet. The marking of products using lasers The marking this product has been classified as Class 1. It means that there is no danger of hazardo

10、us radiation outside the product. Location: Bottom CLASS 1 LASER PRODUCT LASER KLASSE 1 APPAREIL A LASER DE CLASSE 1 LUOKAN 1 LASERLAITE KLASS 1 LASERAPPARAT Resetting the Microcomputer The microcomputer may malfunction (unit can- not be operated, or shows an erroneous dis- play) if the power cord i

11、s unplugged while the power is ON, or due to some other external factor. If this happens, execute the following procedure to reset the microcomputer and return the unit to its normal operating condition. Plug in the AC power cord to the wall outlet, and within 5 seconds, press and hold down the 7 bu

12、tton and press CD button. Please note that resetting the microcomputer will clear the contents of the memory and return the unit to the state it was in when it left the factory. Remote control unit (1) (A70-1690-08): E (A70-1691-08): MX AM loop antenna (1) (T90-0908-08) ANT TERMI CVR (F07-2029-08) B

13、atteries (R6/AA) (2)AC plug adapter (1) (E03-0115-05) Use to adapt the plug on the power cord to the shape of the wall outlet. (Accessory only for regions where use is necessary.) () RXD-M37 2 CONTENTS / ACCESSORIES / CAUTIONS ACCESSORIES CONTENTS CAUTIONS RadioFans.CN 收音机爱 好者资料库 RXD-M37 3 EXTERNAL

14、VIEW Rear cab. (A80-4503-08) Voltage selector * (S62-0124-08) Rubber foot (G11-2957-08) SYSTEMRECEIVERSPEAKERS HM-337-LRXD-M37-LLS-M37-L HM-337-SRXD-M37-SLS-M37-S System configuration * Refer to parts list on page 18. RadioFans.CN 收音机爱 好者资料库 RXD-M37 4 ADJUSTMENT SERVICE ADJUSTMENT Lubrication The me

15、chanical parts are factory coated with a thin coat of light grease and should not require further lubrication. If a light grease is applied, be careful not to get any grease on the play/record head or erase head, hubs, pulleys, tapes reels, drive belts, or switches. Use a good lubricant such as Sili

16、con Lube G322L or Lubricate. Service Check Before aligning the mechanism, wipe off any accumulated dirt with denatured alcohol. Wipe around parts where the tape contacts and around all rotating parts. Drive belts are specially processed. Do not clean them with alcohol. Mechanical Torque Use a casset

17、te type torque gauge and check the tape mechanism. Take-up torque 35 to 70 g-cm Rewind torque 50 g-cm min. Fast forward torque 50 g-cm min. Pinch Wheel Pressure No adjustment to the pinch roller spring is necessary. It should be sufficient to give at least 40 g-cm pull force. Tape Head Servicing Eac

18、h time the unit is serviced, the face of all heads should be thoroughly cleaned with denatured alcohol or commercial head cleaning solution. The playback head should be demagnetized with a commercial demagnetizer. Accumulation of tape oxide during normal operations can cause problems, including loss

19、 of high frequencies and wow and flutter. Erase Head The erase head is properly aligned when the tape rides directly between the tape guide on the head without crinkling the tape. Play/Record and Playback Head Azimuth Adjustment To adjust the play/record and playback head azimuth screw: 1. Connect t

20、wo (2) VTVMs and a dual trace scope to the stereo headphone jack (as shown) with a 32 ohm dummy load. (See Figure 1.) VTVMVTVM DUMMY LOAD JK801 SCOPE CH1 CH2 Figure 1. Azimuth Adjustment RXD-M37 5 ADJUSTMENT 2. Insert a 10 kHz test tape (Teac MTT-1141V or Equivalent) into the tape mechanism and play

21、 it back. 3. While playing back the test tape, slowly turn the azimuth adjusting screw until the amplitude of both channel output waveforms is maximum and in phase. (See Figure 2.) 4. Secure the azimuth screw in place with glue or paint after making the adjustment. Figure 2. Head Output Signal Tape

22、Speed Adjustment 1. Set the function switch to TAPE. 2. Connect a frequency counter with a 32 ohm dummy load to the stereo headphone jack. (See Figure 3.) FREQUENCY COUNTER DUMMY LOAD JK801 Figure 3. Tape Speed Adjustment 3. Insert and play back a 3 kHz test tape (Teac MTT-111 or Equivalent) into th

23、e tape mechanism. 4. Insert an insulated alignment tool and adjust the tape speed potentiometer (MOTOR) until the frequency counter indicates 2940 Hz to 3090 Hz. Bias Oscillator Frequency and Level Adjustment 1. Set the function switch to TAPE and the record and play tape mechanism to RECORD. 2. Con

24、nect a VTVM and frequency counter to test point R/P HEAD. 3. Adjust bias oscillator coil T360 until the frequency counter indicates 81 kHz 0.5 kHz. 4. Confirm the record head voltage equal to: 6-12V. 5. Confirm the erase head voltage equal to: 15-24V. RXD-M37 6 ADJUSTMENT TUNER ALIGNMENT PROCEDURE E

25、quipment needed: 1. AM Signal generator 2. FM Signal generator 3. DC Voltage meter 4. Oscilloscope 5. Output meter (VTVM) AM Alignment Step S/G Frequency Dial SettingIndicator Adjust Remarks 1 450 kHz (1 kHz 30% mod.) 612 kHz Connect oscilloscope or VTVM to speaker jack T201 Adjust until maximum out

26、put 2 531 kHz (1 kHz 30% mod.) Low end Connect DC voltage meter to test point Vt and ground T202 Adjust until Vt equal to 1.5 0.05V 3 1602 kHz (1 kHz 30% mod.) High end Same as step 2 Confirm Vt: 6.58.5V 4 612 kHz (1 kHz 30% mod.) 612 kHz Same as step 1 T203 Maximum output 5 1404 kHz (1 kHz 30% mod.

27、) 1404 kHz Same as step 1 VC201 Maximum output 6 Repeat steps 4 and 5 to minimize tracking error 7 999 kHz (1 kHz 30%mod.) 999 kHz Same as step 1 Offset is less than 6 dB. 60 cm AM SIGNAL GENERATOR AM LOOP ANT AM LOOP ANTENNA DUMMY LOAD TEST UNIT VTVM R-OUT L-OUT GND Figure 4. AM IF/RF Tracking TEST

28、 UNIT Figure 5. AM Band Frequency Coverage Alignment GROUNDMETER Vt DC RXD-M37 7 ADJUSTMENT FM Alignment: Figure 6. FM Band Frequency Coverage Alignment Connect FM S/G to ANT inputs (mod 1 kHz 22.5kHz dev.) Step S/G Frequency Dial Setting Indicator Adjust Remarks 1 87.5 MHz Low end Connect DC voltag

29、e meter to test point Vt and ground L203 Adjust until Vt equal to: 1.5 0.05V 2 108 MHz High end Same as step 1 Confirm Vt: 7-9V 3 90.1 MHz 90.1 MHz Connect oscilloscope or VT/VM to speaker jack L204 Adjust until Maximum output 4 106.1 MHz 106.1 MHz Same as step 3 VC202 Adjust until maximum output 5

30、Repeat steps 3 and 4 to minimize tracking error. FM GENERATOR DUMMY ANTENNA TP1 TEST UNIT OSCILLOSCOPE DUMMY LOAD VTVM R-OUT L-OUT GND Figure 7. FM Band/Tracking TEST UNIT GROUNDMETER Vt DC ACEBD 2 1 3 5 7 4 6 Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD (Compon

31、ent side view) U101 Q101 D108 Q106 Q104 LCD101 CN107 CN109 CN104 CN105 D102 D101 Q103 Q105 CN108 CN103 D103 CN101CN102 DISPLAY CN110 LED182 LED181 LED180 SW107 FRONT KEY D106 Q182 Q181 Q180 SW113 SW102 SW101 CN112 SW100 SW108SW103 SW110SW111 SW106 CN111 SW104SW109 SW105 SW112 D105 D104 U102 SW114SW1

32、15SW116SW117SW118 CN113 R143 R144 R145 R101 R104 C104 R100 C108 R107 C116 R142 R140 R141 R139 R137 R138 R136 R6 C118 C107 1 100 50 51 8180 3031 C110 R4 R110 R109 R108 R103 C102 C115 R120R121 C113 R119 R118 R117 C112 R115 R125 R1 R149 R113 R112 R148 R123 R124 C111 R3 R128 R129 R130 R131 R132 R133 R13

33、4 C119 C105 C016 R2 R8 R114 C114 R7 R5 J6 13 J21 R116 R122 J22 J18 R102 J1 J19 J16 J20 J23 J24 J25 J2 J3 J5 R135 J9 R147 J7 X102 X101 C101 C103 J8 C109 J15 J12 J14 J13 R146 L101 J4 R111 J11 40 110 18 1851 139161 1 EB BE BE ECEC R150 R160 R169 R170 R171 R172 R151 R152R153R154R155 R168 R156 R164 R165

34、R167 R166 R159 R163 R162R157 R158 R161 C118 C117 R180 R181 R182 R186 BE BEBE C183 R185 R173 R183 R188 R184 POWER RDS/ DISPLAY C180 TIME SETTIMER ON/OFF REC VOLUME UP TAPE 1 1513 IGO 6 VOLUME DOWN TUNER /BAND CD EQ/BASSREPEATPROG.PRESETDOWNPRESETUP 61 TOP KEY 8 FGIKMOHJLN 2 1 3 5 7 4 6 Refer to the s

35、chematic diagram for the value of resistors and capacitors. PC BOARD (Component side view) 109 MAIN HEADPHONE U601Q801 Q802 Q805 Q601 Q203 Q208 Q202 Q602 U201 Q206Q205 Q201 Q204 U250 Q207 U260 Q263 Q261 Q260 Q262 Q250 Q280 Q252 Q251 Q316 Q315 Q305 Q306 Q301 Q303 Q302 Q304 Q317 Q312 Q308 CN602 Q313 Q

36、307 Q310 Q311 Q309 Q360 CN806 CN201 FM ANT AM ANT VD204 VD205 CN801 CN802 D802 Q803 CN601 D302 Q281 U301 CN301 CN302 VD201 CN260 D301 D303 U802 L CN803 CN805 ZD802 CN804 D803 ZD801 Q806 Q804 CN202 U801 JK801 D202 VD203 VD202 D201 D203 D204 R SPEAKERS ZD901 Q902 D907 D904 D902 D901 D903 D905 CN901 D9

37、06 POWER FMVT AMVT C220 C236 C2 C293 J10 L C209 C210 C211C212 R213R214 C215C216 R211R212 R247R248 C247 TP12 1 112 2413 14 2815 R807 C825 C823 R809 R810 C824 C826 R808 C805 R805 R801 R813 R6 R313 R326 R341 R333 R314 R325 R334 R819 R815 C829 C817 C822 R812 C322 R802 R806 C806 R814 C248 C205 C273 TP2 C

38、265 R216 R215 C217 R280 C255 TP6 C253 1 1120 101 8 169 R259 R265 TP1 C224 R1 R209 C213 R227 R233 R204 C233 TP3 R244 L202 TP4 C202 TP5 C245 C201 C855 C856 C232 R231 C228 R293 C229 R229 C227 R203 R202 C222 C223 C219 C204 C231 C230 C239 C203 C234 L201 21 C200 C828 C827R823 R824 R210 C214 C237 C226 R236

39、 C208 R811 C821 R217 C218 R208 R219 R221 R234 R207 R285 R205 R609 C613 R607 R611 R605 C609 C284 R286 R284 R256 C256 C258 C259 R310 R339 R309 R347 R327 R323 C311 C312 C305 R328 R348 C326 C310 R321 C626 C331 R343 C624 C628 C629 C622 C618 C614 R608 R612 R606 C610 C616 C612 C608 C606 C604 C602 C282 C632

40、 R624 R622 R344 C332 R804 R803 R322 R610 C621 C617 C615 C611 C607 C605 C603 C281 C601 C631 R623 R621 R320 R312 C350 R316 L302 C320 C302 C301 R311 C319 R315 C324 R304 R336 R337 TP10 TP9 R822 R818 R817 C333 R335 R330 R331 R346 R338R332 R340 C316 C360 R302 R318 R317C323 C366 C364 R360 R301 R303 C308 R3

41、06 R307 R308 R319 R305 C307 C309 TP7 C321 L301 TP11 MGND C365 R364 C362 C363 R365 TP13 TP8 R220 R206 R201 R200 C221 R223 R239 R218 C294 R235 C271 C270 C269 R270 R269 C267 R268 R267 C268 R271 C261 C260 C274 C264 C262 C287 R2 R242 C235 C242 R238 C250 R251 R252 C251 R253 R254 C252 R261 C286 R262 C285 R

42、263 R288 R277 R297 C206 R226 EB EB EB EBEB EB EB EBEB EB EB EB EB EB EB EB EB EBE 1 8 16 9 B EB EB EB EB EBEBEB EB EB EBEB E OGI B EBEB EB EB EB CE EB EB 15 L205 CF201 J9 15 J31 J22 J26 R613 R600 J36 R830 J34 J33 T360 2 J27 1 15 J30 C820 J39 J35 J32 J40 1 13 4 R816 19 BE CE CF202 CF203 C207 R222 R22

43、4 J14 R272 J13 R274 R275 R276 J12 J11 J3 J24 R249 R250 J38 J23 R329 J28 R255 R258 C257 13 R243 L806 L807 L808 T203 J4 VC201 C238T202 GND2 C240 R246 C272 J2 J1 R266 J6 R225 J8 R281 R279 R273 C290 C254 X250 1 C263 OSC1 GND1 6 X260 C266 R257 R283 R232 J15 0SC2 R228 J5 L203 R230 J7 L204 BPF201 L208 T201

44、 VC202 L801 C813 L802 C812 C809 C803 C818 C623 C619 C625 C620 C804 C810 L809 L810 ICP R821 14 J16 J17 J20 R354 J29 J25 C304 C315 C303 J19 C314 C325 C317C313 J21 J18 R355 R324 C830 R820 C831 C329 C327 C627 C832 C801 C833 BE J37 C814 C819 C816 C815 112 TIE C811 C902 C901 R903 R902 R901 CE C903 C904 C9

45、07 C908 F901 RY901 C905 C906 BLACKRED2 14 RED1 AC1 AC2 L901 T901 P2P1 11 PRTQS 2 1 3 5 7 4 6 PC BOARD (Component side view) Refer to the schematic diagram for the value of resistors and capacitors. U703 U701 Q701 Q703 Q705 Q702 U702 D701 CN705 CN702 CN706 CN703 Q704 CN704 CD SERVO CN701 D702 C735 J2

46、 J4 R722 R723 R725 R726 R727 C734 C740 J23 1 61 21 13 110 13 12 2413 5180 30 31 50 100 81 1 16 30 151 162 151 C751C719 X701 C723 J39 C705C704 C790 C722 J10 J17 J15 J12 J11 J7 J6 C710 J5 J3 C713 R711 C752 L703 L704 J16 J18 J19 J24 C750 L706 J28 J1 R748 J8 J20 J21 J22 J32 J33 J34 J35 J36 J27 R700 R701

47、 R705 R702 R762 R761 R738 R724 R734 R736 C756 R741 C725 C743 C758 C742 R721 C728 R731 R730 C712 C759 C714 R716 R763 EB R729 R733 R732 C736 C738 C703 C715 C729 C745 C741 C755 C760 C749 R737 R740 C707 R704 R703 C706 R707 C711 C701 C708 R706 C717 C727 C757 J702 R742 C720 GND C718 C733 R717 TE0 FE0 VREF

48、 C716 C754 J703 R743 J701 R757 R744 R758 R745 R746 R760 R759 R747 R739 R728 RF0 C744 C753 C732 C739 C737 C709 C726 C730 C731 J704 C702 TE03 C721 C748 R735 C747 C746 J31 C724 J29 J38 CM-CHOKE J26 J30 J25 L705 J13 J14 J9 BE BE BEBE 12 ABDCE 2 1 3 5 7 4 6 RXD-M37 Q705 Q701 Q702 CN702 D701 Q703 CN703 (BOTTOM VIEW) (BOTTOM VIEW) CN701 U701: TC9462F U702: TA2153FN U703: TA2092N Q701,702 : 8