Kenwood RXD-251 Page 18 Service Manual Download

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C123

C122

J129

J128

R146

C157

C121

R123

C117

R154

J135

R209

C203

R206

J136

J164

C202

J117

J154

R204

R157

R161

R118

C149

J137

C171

D105

J134

L106

C106

C102

C105

R109

R111

C110

R106

R107

C108

R108

R110

R101

J100

C150

C100A

R145

C109

IC101

C103 TC101

C111

R102

TC102

TC201

R100

L101

R201

C164

J181

C201

C218

J127

C124

R120

C160

C126

R149

C138

C214

C213

R122

CF102

CF101

C134

R207

C205

R160

J112

CF103

C118

C215

C137

C128

R203

C135

J182

L204

R113

C116

R162

C165

R208

R151

R202

R155

Q101

TC103

C107

R114

C166

C169

D108_1

C167

C112

C210

C209

R140

J168

C145

J165

R138

C153

C216

C212

C144

C143

R133

J180

C155

C100B

C211

J139

C217

R112

J166

R132

C101

L102

L201

L104

C119

JK101

C113

R134

R150

R103

J106

C104

R104

R105

J107

R121

CF105

R205

C204

C139

C140

R212

C170

R158

C151

J177

C130

C125

R115

L108

L107

C131

C152

R119

C129

J184

D202

R210

R211

C141

R131

C208

X201

R214

TP1

TP2

C162

C161

Q115

D110

J155

J156

J172

J178

R130

J125

J157

J158

J114

J113

J124

R213

R219

J122

J171

J162

J118

J191

J190

J115

C175

C174

Q116

Q109

C127

T102

L105

T101

L202

TC202

CF104

J167

J153

J109

R153

R156

J111

J179

J110

C132

R128

R126

J126

R218

R217

R216

C133

J131

R129

R127

J123

C220

Q113

Q201

Q105

Q112

Q204

Q110

Q106

Q111

Q114

Q108

Q107

Q202

Q102

Q100

Q203

D108_2

C207

C142

J132

J183

J185

CN101

IC201

IC102

D106_1

D106_2

D101

D102

L103

L203

L205

Refer to the schematic diagram for the value of resistors and capacitors.

PC BOARD (Component side view)

TUNER UNIT : RXD-371S (M2)

Summary of Contents for RXD-251

Page 1: ...ulations No 21 DFR 1040 10 Chapter 1 Subchapter J DANGER Laser radiation when open and interlock defeated AVOID DIRECT EXPOSURE TO BEAM Panel CD A60 Front glass A29 Knob K29 Knob K29 7512 08 Knob K29 7519 08 Knob K29 7518 08 Phone jack E11 0386 08 Konb K 29 7516 08 Cassette lid R A53 Front glass R B10 3451 08 Front panel A60 Knob k29 Knob K29 7523 08 Knob K29 7522 08 Knob K29 7521 08 Cassette lid ...

Page 2: ...R key while holding the Stop 7 key of the CD section pressed to switch off the power and then switch the power on again after a few seconds Please note that resetting the microcomputer clears the contents stored in and returns and to condition when it left the factory TEM MAIN UNIT DESTINATION SPEAKER 01 RXD 301 E3T2X3 LS N301 01E RXD 301E E4 LS N301 01W RXD 301W Q2 LS N301 51 RXD 351 E1T1 LS N351...

Page 3: ...A3 3 EXTERNAL VIEW Slide switch S62 0083 08 AC power cord E30 Cabinet A01 Phono jack E63 1073 08 Slide switch S62 0057 08 Lock terminal board E70 0108 08 Antenna terminal E70 Illust is RXD 351 Refer to parts list on page 38 ...

Page 4: ... key to set the present time LAY DEMO key hes the display contents d for demonstration DEMO ON OFF O MONO key hes the tuning mode UAL PRESET key to memorize broadcasting stations in the desired order D key s to switch the receiving band TUNING keys Used for tuning to broadcasting stations and for time settings PHONES terminal For connection of a headphone optional AUTO PRESET key Used for automati...

Page 5: ...RXD 251 301 351 371S A3 5 CONTROLS ...

Page 6: ...01 to MAIN PCB RF AMP FILTER RC TUNE AMP MIX IFT CF1 BUFF OSC TUNE AMP IF CF2 TUNE AM RF AMP RF Q106 FM SECTION Q101 PLL IFT AM u COM IC201 L P F Q107 108 7 2MHz AM SECTION V T AM ANT GND FM ANT OUT MIX BUFF AMP TUNE AM ANT GND FM ANT AMP AM RF TUNE OSC ANT RF IFT PLL L P F Q107 108 AMP RF IC201 u COM AMP Q106 IFT CF1 IF FILTER AM SECTION AM FM SECTION CF2 OUT RC IC102 IC102 TUNE FM RF FM OSC Q102...

Page 7: ...ly 26 MODE SW1 I Model discrimination 27 SCOR I CXD2508Q Sub code synch detect 28 COUNT O Track number count signal output 29 REMOTE IN I Remote signal input 30 VR I VR encoder input A 31 VR I VR encoder input B 32 PIC UP I Pick up SW 33 PIC DOWN I Pick down SW 34 DISC COUNT I Disc counter SW 35 TURNTABLE SW I Turntable SW 36 TRAY OPEN I Tray open SW 37 TRAY CLOSE I Tray close SW 38 N C No used 39...

Page 8: ...TION TAPE O Function tape out Tape Others LCD BACK LIGHT O LCD back light control On Off N C No used EX BASS O EX bass control On Off LATCH No used 0 STB O 74HC4094 strobe N NAME I O DESCRIPTION ACTIVE MUTE O CXD2508Q Muting DAC H ON L OFF CONTROL O CXA1782BQ CXD2508Q Vdd control H Others L CD XRST O CXD2508Q XRST T T O T T U D Motor CONTROL O T T Motor speed Control TRAY O Tray Motor Control TRAY...

Page 9: ...ted by sensor switch At this time the position of TR lock gear is as shown figure 1 The rotary motor turns clockwise and the relay gear B also turns clockwise By turning the relay gear B the arm of relay gear B moves to arrow direction 2 7 7 7 and the TR lock gear will be ocked After that the change gear separates from TR lock gear The UD reduce gear turns clockwise by turning the change gear The ...

Page 10: ... ove the screws 1 x 4 top chassis and spring 2 x 2 ch the traverse unit by removing shield bottom side and screws 3 x 2 the short land and remove screws 4 x 4 5 x 1 ove the rod and replace the pick up 1 x2 1 x2 3 x1 3 x1 2 x2 2 x1 Fig 4 Fig 5 BOTTOM VIEW 4 x2 4 x2 5 x1 Fig 7 Fig 6 SHORT LAND TOP VIEW ...

Page 11: ...TRACKING A 531 kHz or 530 kHz 1 kHz 30 MOD 30 dBu ANT INPUT B 531 kHz or 530 kHz L104 Maximum output 3 HIGHEND TRACKING A 1602 kHz or 1610 kHz 1 kHz 30 MOD 30 dBu ANT INPUT B 1602 kHz or 1610 kHz TC102 Maximum output 4 VT Connect the DC voltage meter to TP2 531 kHz L105 VT 1 2V 0 05V 1602 kHz Check the VT 7 3V 1 0V NO ITEM INPUT SETTING OUTPUT SETTING TUNER SETTING ALIGNMENT POINTS ALIGN FOR FIG 1...

Page 12: ...PUT SETTING TUNER SETTING ALIGNMENT POINTS ALIGN FOR FIG IF 153 kHz 1 kHz 30 MOD 60 dBu ANT INPUT D B 153 kHz T102 Maximum output Minimum distortion LOWEND TRACKING 153 kHz 1 kHz 30 MOD 30 dBu ANT INPUT D B 153 kHz L201 Maximum output HIGHEND TRACKING 279 kHz 1 kHz 30 MOD 30 dBu ANT INPUT D B 279 kHz TC201 Maximum output VT Connect the DC voltage meter to TP2 153 kHz L202 VT 1 0V 0 05V 279 kHz Che...

Page 13: ...AY Azimuth adjustment screw In a setting wher the output is maximized adjust the azimuth adjustment screw so that the Lissajous figure appearing on the oscilloscope screen comes near to a line slanted45 Note The head should be installed in such a manner that it approaches the tape face PC board adjustment Tape speed MTT 111 TCC 100 SCC 1727 3 kHz 4 dB A PLAY SFR201 Adjust so that Frequency is 3 kH...

Page 14: ...ickup lens On the power from 0 08 to 0 15 mW when the diffraction grating is correctly aligned with the RF level of 0 6 Vp p or more Press the PLAY PAUSE key Pickup FOCUS ERROR BIAS Test disc Type 4 Connect an oscilloscope as follows CH1 RF R07A GND VC IC01 48 pin FE BIAS VR01 Optimum eye pattern Press the PLAY PAUSE key sc SONY YEDS 18 Test Disc or equivalent KTD 0 0 08 0 15 mW Optical power mete...

Page 15: ... 1 3 1 5 1 5 1 2 1 2 1 3 1 1 17 1 17 3 3 1 1 3 1 3 1 1 4 1 4 1 3 5 1 5 1 6 1 6 1 1 6 CANADA U S A P1 K1 COUNTRY DESTINATION AUSTRALIA GENERAL MARKET JAPAN PX M1 X3 J Y1 ABB DESTINATION COUNTRY ABB COUNTRY DESTINATION ABB AUSTRALIA X2 GENERAL MARKET M3 GENERAL MARKET DESTINATION COUNTRY M2 ABB ABB U K DESTINATION COUNTRY EUROPE T1 E1 DESTINATION COUNTRY EUROPE ABB E4 DESTINATION COUNTRY RUSSIA ABB ...

Page 16: ...251 301 351 371S A3 PARTS DESCRIPTIONS ...

Page 17: ...R146 J185 CN101 Q108 Q107 Q109 IC201 IC102 E B E B E B G S D E B 17 Refer to the schematic diagram for the value of resistors and capacitors A C E B D PC BOARD Component side view R146 R130 J126 J136 J137 R122 C108 C149 R118 R161 R108 C109 C105 C106 C110 C111 L101 D106_1 R109 C103 J123 R111 R106 R107 J168 J165 R110 R101 J100 C150 R145 IC101 Q106 C102 TC102 R134 C116 R114 R113 C114 C171 C134 C138 R...

Page 18: ...0 A G U U A R103 J106 C104 R104 R105 J107 R121 CF105 1 4 R205 C204 C139 C140 R212 C170 R158 C151 J177 C130 C125 R115 L108 L107 C131 C152 R119 C129 J184 D202 R210 R211 C141 R131 C208 X201 R214 12 1 13 24 12 1 10 1 13 24 E B E B TP1 2 1 TP2 2 1 C162 C161 Q115 D110 J155 J156 J172 J178 R130 J125 J157 J158 J114 J113 J124 R213 R219 J122 J171 J162 J118 J191 J190 J115 C175 C174 E B Q116 E B Q109 E B C127 ...

Page 19: ...8 R436 R438 R434 R432 R430 R420 R426 R414 R410 R462 R458 R460 R451 R470 R494 R472 R467 R465 R212 R214 R221 R236 R270 R703 CN701 R715 R224 R226 R225 R259 R248 R244 R243 R247 R265 R238 CN205 1 8 CN205 1 6 CN204 R240 R258 R261 R260 R239 R267 R266 R541 R540 R542 R548 R544 R546 R525 R531 R512 R511 R513 R514 C234 C243 CN203 R515 R510 R707 R709 R713 R710 R504 R503 R506 R501 R529 R533 R507 R509 R704 D708 ...

Page 20: ... C628 1 8 CN605 1 1 17 6 C683 JK601 C684 C631 1 CN604 RM601 REMOTE SENSOR 3 C622 C623 X601 100 31 50 81 51 80 30 1 C618 1 3 C629 E B Q611 IC602 E B Q301 Q302 Q303 IC301 MIC2 MIC1 PHONES E E C316 C315 1 C314 E 7 1 B B B Q603 E J645 J646 J663 J652 J656 J650 J651 CN09 18 17 1 2 J659 VR601 MIC VOLUME J655 J640 J639 J638 J635 J634 J643 J654 J662 J661 J665 J664 J632 J628 J660 J644 R622 CN401 A VR603 B C...

Page 21: ... 220P C222 220P C221 220P R217 1K R216 1K R218 1K C171 R161 10K 0 01 C150 0 1 C166 RFI N BYPAS MIX IN AFC GND GND IF OUT AFC OSC VCC 1 2 3 4 5 6 7 8 9 TC101 10P 0 022 C104 1K R102 100K R101 L102 T101 1 2 3 6 5 4 6 5 4 1 2 3 22 R103 18P C105 33K R110 C110 R111 1K 100K R109 56P C111 L103 0 1 C100A 100P C112 2 3 1 4 5 L101 1000P C101 100P C155 R214 0 022 C106 R112 100 AM FM BAND HF LF HF LF QUENCY FR...

Page 22: ...STEREO 17 16 15 14 DECODER MUTE DRIVE STEREO 13 SW TRIG FF FF VCO AM SW FM PHASE DET PILOT FF DET VCC DESTINATION COUNTRY RUSSIA NO Q1 A ABB R123 33 1 2W R103 YES B 18K C101 220u16 5 6K R140 YES DESTINATION COUNTRY DESTINATION EUROPE NO E2 A ABB COUNTRY U K T1 EUROPE NO E1 A ABB 8 2K R123 68 1 2W R103 YES B C101 100u16 3 6K R140 8 2K R123 NO 68 1 2W R103 YES B 100u16 3 6K R140 C101 5V B 5V B B 5V ...

Page 23: ...23 22 4 7K R35 17 16 15 14 14 13 1K R90B 100 R38 100 R37 330 R36 150K R80 C86 1000P 4 7K R39 1000P C85 1000P C87 100P C84 1000P C88 R81 100 10 9 7 5 4 100 R82 1 8 C86A 0 022 0 1 C90A 13 3K 1 2 D D 4 3 5 D D BIAS 100 DETECT TERMINAL 6 8 7 BIAS 100 VCC VCC 10 9 11 10K 13 12 14 x2 D 15 16 x2 D MUTE 27 x3 8 x3 8 LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT x2 x2 D 32 31 30 D 29 28 13 3K CURRENT REG 13 3K 10K 1...

Page 24: ...F703 T2AL250V NO C450 451 525 526 NO 3300u50 C701 702 GBU4D D701 T2AL250V T16A250V F702 T2 E3 ABB U K EUROPE DESTINATION COUNTRY NO STK405 70A NO B C NO A IC501 P9 NO NO F703 3300u50 YES NO C525 526 C450 451 C701 702 AUSTRALIA X3 YES NO GBU4D D701 T16A250V F702 Q1 ABB RUSSIA DESTINATION COUNTRY NO STK405 70A NO A B C IC501 P9 NO F703 NO GBU4D 3300u50 NO C701 702 C450 451 D704 C525 526 YES T16A250V...

Page 25: ... 14 S12 13 S11 12 S4 11 S10 10 S9 9 S8 8 S7 7 S6 6 S5 5 S4 4 S3 3 S2 2 S1 1 PIN No 1 M14 M12 M9 M10 M6 M7 M36 M2 2 M3 M1 3 M4 1a 2f M5 4 1c 1b 2g 2e 1d 5 6 2d 2a M11 M15 2b 2c M8 7 M35 M13 M16 M34 M17 8 9 M21 3a 3f M33 3c 3b 3n 3i 3e 3g 10 3d 11 12 4f 4n 4e 4g 4i 4j 4d 13 14 4k 4a 5f 4c 4b 5g 5e M22 15 5d 16 6f PIN No 6e 6g 6h 6i 8d 18 19 COM0 7a 6a 7f M31 8f M24 7c 7b 7g 7e 6c 6b 7d 20 M23 21 M26...

Page 26: ... 622 626 681 665 660 663 662 618 658 602 625 604 606 609 625 608 674 605 607 636 636 637x2 664 673 694 693 631 795 Bx3 Bx2 Bx2 N N N N Ax2 Ax2 Q Q Q Q Bx2 Bx2 B Cx5 Gx2 Gx2 M M M M Gx4 745 797 799 654 653 652 647 648 649 650 651 646 603 617 616 655 656 798 720 719 B A A Tx4 Sx4 A Ax2 789 711 734 712 640x2 641x2 798 713 Gx2 615 614 F F F F L R E E E Gx2 Gx2 Dx2 Gx11 G Gx6 C C Jx2 Jx2 Hx2 Kx2 785 79...

Page 27: ...CK X3 B 601 1A A01 3677 08 CABINET GRAY K1P1X2 H 601 1A A01 3677 08 CABINET GRAY M3 H 601 1A A01 3678 08 CABINET METAL SILVER E2M2 S 601 1A A01 3678 08 CABINET METAL SILVER M1X1Y1 S 601 1A A01 3678 08 CABINET METAL SILVER T1E1Q1 S 601 1A A01 3679 08 CABINET METAL BLACK E4 B 601 1A A01 3679 08 CABINET METAL BLACK T2Q2E3 B 602 1A A22 1817 08 SUB PANEL K1P1 602 1A A22 1818 08 SUB PANEL M1X1Y1 602 1A ...

Page 28: ...PUT X1X2Q1 H 667 1B K29 7549 08 KNOB ON STANDBY INPUT Y1 H 667 1B K29 7550 08 KNOB POWER INPUT K1P1 H 668 1B K29 7521 08 KNOB DISC 1 669 1B K29 7522 08 KNOB DISC 2 H50 2992 08 ITEM CARTON CASE T1E1 H50 2993 08 ITEM CARTON CASE E2 H50 2994 08 ITEM CARTON CASE Q1 H50 2995 08 ITEM CARTON CASE M1 H50 2996 08 ITEM CARTON CASE M2 H50 3001 08 ITEM CARTON CASE M3 H60 0685 08 ITEM CARTON CASE K1P1 H60 0686...

Page 29: ... N C150 C91 0769 05 CERAMIC 0 010UF K 670 1B K29 7523 08 KNOB DISC 3 671 1B K29 7524 08 KNOB BASE DISC 672 1B K29 7525 08 KNOB TIMER E3E4 B 672 1B K29 7525 08 KNOB TIMER T2Q2X3 B 672 1B K29 7530 08 KNOB TIMER K1P1Y1 H 672 1B K29 7530 08 KNOB TIMER M1M2M3 H 672 1B K29 7530 08 KNOB TIMER T1E1E2 H 672 1B K29 7530 08 KNOB TIMER X1X2Q1 H 673 2B K29 7526 08 KNOB TUNING E3E4 B 673 2B K29 7526 08 KNOB TUN...

Page 30: ...60 C91 0085 05 CERAMIC 0 022UF N C161 162 CE04KW1H010M ELECTRO 1 0UF 50WV C164 CK45FB1H103Z CERAMIC 0 010UF Z M2 C164 CQ93FMG1H682J MYLAR 6800PF J M1M2M3 C164 CQ93FMG1H682J MYLAR 6800PF J Y1 C165 CK45FB1H223Z CERAMIC 0 022UF Z M2 C165 CQ93FMG1H682J MYLAR 6800PF J K1P1Y1 C165 CQ93FMG1H682J MYLAR 6800PF J M1X1X2 C165 CQ93FMG1H682J MYLAR 6800PF J M3X3 C166 CK45FB1H223Z CERAMIC 0 022UF Z M2 C167 CQ93F...

Page 31: ... 1500PF K C114 CK45FB1H104Z CERAMIC 0 10UF Z C116 CQ93FMG1H471J MYLAR 470PF J C117 CC45FSL1H200J CERAMIC 20PF J C118 CE04KW1C101M ELECTRO 100UF 16WV C121 CC45FSL1H150J CERAMIC 15PF J C122 CE04KW1H2R2M ELECTRO 2 2UF 50WV C123 CE04KW1H010M ELECTRO 1 0UF 50WV C124 CC45FSL1H200J CERAMIC 20PF J C125 CE04KW1H010M ELECTRO 1 0UF 50WV C126 CK45FB1H473Z CERAMIC 0 047UF Z C127 CE04KW1H100M ELECTRO 10UF 50WV ...

Page 32: ...28 CK45FB1H102K CERAMIC 1000PF K C529 CE04KW1H4R7M ELECTRO 4 7UF 50WV C225 CE04KW1H3R3M ELECTRO 3 3UF 50WV C226 CE04KW1H3R3M ELECTRO 3 3UF 50WV C227 CE04KW1C470M ELECTRO 47UF 16WV C228 CE04KW1H100M ELECTRO 10UF 50WV C230 CQ93FMG2A153J MYLAR 0 015UF J C231 CQ92FM1H103J MYLAR 0 010UF J C232 CQ92FM1H472J MYLAR 4700PF J C233 CQ92FM1H223J MYLAR 0 022UF J C234 CE04KW1C470M ELECTRO 47UF 16WV C235 CK45FB1...

Page 33: ...91 1525 08 CERAMIC 0 1UF Z C531 CE04KW1H1R0M ELECTRO 1 0UF 50WV C532 CE04HW1HR47M NP ELEC 0 47UF 50WV C541 542 CK45FB1H102K CERAMIC 1000PF K C681 684 CE04KW1H100M ELECTRO 10UF 50WV K1P1 C685 687 CK45FB1H104Z CERAMIC 0 10UF Z K1P1 C701 702 CE04KW1H332M ELECTRO 3300UF 50WV E1E2E3 C701 702 CE04KW1H332M ELECTRO 3300UF 50WV E4T1T2 C701 702 CE04KW1H332M ELECTRO 3300UF 50WV K1P1 C701 702 CE04KW1H332M ELE...

Page 34: ...WITCH D601 1SS133T 77 DIODE D602 1N4148 DIODE D603 604 1SS133T 77 DIODE D607 1SS133T 77 DIODE E1E2E3 D607 1SS133T 77 DIODE E4T1T2 D607 1SS133T 77 DIODE Q1Q2 D613 B30 2540 08 LED E1E2E3 D701 GBU4D DIODE E4T1T2 D701 GBU4D DIODE K1P1M3 D701 GBU4D DIODE Q1Q2X2 D701 GBU4D DIODE X3 D701 GBU6D DIODE M1M2X1 D701 GBU6D DIODE Y1 D702 705 1N4002L DIODE D706 1SS133T 77 DIODE D707 MTZ8 2B ZENER DIODE D708 MTZ6...

Page 35: ...2 T03 0505 08 TWEETER UNIT MULTIPLE T10 1004 08 WOOFER UNIT 40W 5INCH T10 1005 08 WOOFER UNIT 60W 6 5INCH W03 5839 05L SPEAKER LS N301 LEFT E3E4 W03 5839 05R SPEAKER LS N301 RIGHT E3E4 W03 5839 05L SPEAKER LS N301 LEFT T2Q2X3 W03 5839 05R SPEAKER LS N301 RIGHT T2Q2X3 W03 5840 05L SPEAKER LS N351 LEFT K1P1Q1 W03 5840 05R SPEAKER LS N351 RIGHT K1P1Q1 W03 5840 05L SPEAKER LS N351 LEFT T1E1E2 W03 5840...

Page 36: ...U K ning frequency range 153 kHz 279 kHz W Tuner section XD 371S ning frequency range 5 95 MHz 17 9 MHz Cassette deck section Track 4 track 2 channel stereo Recording system AC bias system Frequency 105 kHz Heads A deck Playback recording head 1 Erasing head 1 B deck Playback head 1 Motor 1 Fast winding time Approx 100 seconds C 60 tape CD player section Laser Semiconductor laser Wow Flutter Less ...

Page 37: ...G Sirtori 7 9 20129 Milano ltaly KENWOOD IBÉRICA S A Bolivia 239 08020 Barcelona Spain KENWOOD ELECTRONICS AUSTRALIA PTY LTD A C N 001499 074 P O Box 504 8 Figtree Drive Australia Centre Homebush N S W 2140 Australia KENWOOD LEE ELECTRONICS LTD Unit3712 3724 Level37 Tower1 Metroplaza 223HingFongRoad KwaiFongN T HongKong KENWOOD ELECTRONICS GULF FZE P O Box 61318 Jebel Ali Dubai U A E KENWOOD ELECT...

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