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MINI HiFi COMPONENT SYSTEM
RXD-251/301/301E/301W/
RXD-351/351E/351W/371S/A3
SERVICE MANUAL
(XD-251~A3)**
Knob *
(k29-)
Knob
(K29-7512-08)
Knob *
(K29-)
Knob
(K29-7513-08)
Mic jack
(E11-0387-08)
Knob
(K29-7511-08)
Knob
(K29-7515-08)
Front glass(L)
(B10-3450-08)
Cassette lid(L) *
(A53-)
**Refer to page 2 if you want to know system configuration.
In compliance with Federal Regulations, following are reproduc-
tions of labels on, or inside the product relating to laser product
safety.
Knob
Knob
(K29-7521-08)
(K29-7522-08)
KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM
© 1998-7/B51-5454-00 (K/K) 3763
Knob
(K29-7523-08)
* Refer to parts list on page 38.
Knob *
(K29-)
Panel(CD) *
(A60-)
Front glass *
(A29-)
Knob *
(K29-)
Knob
(K29-7518-08)
Knob
(K29-7519-08)
Phone jack
(E11-0386-08)
Konb
(K-29-7516-08)
Front glass(R)
(B10-3451-08)
Cassette lid(R) *
(A53-)
Front panel *
(A60-)
Illust. is RXD-351.
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Table of Contents
Related Manuals for Kenwood RXD-251
Summary of Contents for Kenwood RXD-251
- Page 1 **Refer to page 2 if you want to know system configuration. In compliance with Federal Regulations, following are reproduc- KENWOOD-Crop. certifies this equipment conforms to DHHS tions of labels on, or inside the product relating to laser product Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.
-
Page 2: Table Of Contents
RXD-251/301/351/371S/A3 CONTENTS / ACCESSORIES Contents CONTENTS / ACCESSORIES ........2 WIRING DIAGRAM ............15 EXTERNAL VIEW ............3 PARTS DESCRIPTIONS ...........16 CONTROLS ..............4 PC BOARD ..............17 BLOCK DIAGRAM ............6 SCHEMATIC DIAGRAM ..........23 CIRCUIT DESCRIPTION ..........7 EXPLODED VIEW .............37 CD MECHANISM OPERATION DESCRIPTION ..9 PARTS LIST...............38... -
Page 3: External View
RXD-251/301/351/371S/A3 EXTERNAL VIEW Cabinet * (A01-) Antenna terminal * (E70-) Phono jack (E63-1073-08) Slide switch (S62-0083-08) Slide switch (S62-0057-08) Lock terminal board (E70-0108-08) AC power cord * (E30-) Illust. is RXD-351. * Refer to parts list on page 38. -
Page 4: Controls
RXD-251/301/351/371S/A3 CONTROLS 4 5 6 CD unit ¢ DISC DISC 1 DISC 2 DISC 3 SKIP 1 Skip ( 4 , ¢ ) keys 4 OPEN/CLOSE ( 0 ) key 2 DISC SKIP key The disc tray is opened and closed. - Page 5 RXD-251/301/351/371S/A3 CONTROLS...
- Page 6 TUNER UNIT FM FRONT-END Q101 FM ANT TUNE RXD-A3(K1,P1) TYPE ONLY FILTER +VCC IC602 SUB WOOFER IC102 TUNE FM SECTION JK601 PRE AMP AM ANT BUFF AM SECTION AM RF Q106 -VCC u-COM TUNE IC201 AUDIO UNIT/DISPLAY UNIT JK502 Q511, HEADPHONES Q107,108 Q403,404...
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Page 7: Circuit Description
RXD-251/301/351/371S/A3 CIRCUIT DESCRIPTION 1. Microprocessor : (IC601, LC867224A-5H71) 1-1 Pin description Active Name Description LC7218, LC75392 CE out ENABLE – No used LC7218, LC75392, 74HC4094 data out Data output to LC7218 LC 7218, LC75392, 74HC4094 clock out DATA Serial data out to CXD2508Q... - Page 8 RXD-251/301/351/371S/A3 CIRCUIT DESCRIPTION Active Name Description VDD3 – POWER - SW Power SW out SYS - MUT System mute out TU - MUT Tuner mute out MODE - SW - IN No used FUNCTION - TAPE Function tape out Tape...
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Page 9: Cd Mechanism Operation Description
RXD-251/301/351/371S/A3 CD MECHANISM OPERATION DESCRIPTION 1. In case of disc 3 (Refer to figure 1 and 2) 1 The rotary motor turns counterclockwise by pressing disc 3 key, therefore the turntable turns clockwise and disc 3 is detect- ed by disc number detector switch. - Page 10 RXD-251/301/351/371S/A3 CD MECHANISM OPERATION DESCRIPTION How to replace the pick up. (Refer to figure 4~7) 1. Remove the screws (1 x 4), top chassis and spring (2 x 2). 2. Detach the traverse unit by removing shield (bottom side) and screws (3 x 2).
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Page 11: Adjustment
RXD-251/301/351/371S/A3 RXD-251/301/351/371S/A3 ADJUSTMENT FM SECTION (Except for Europe version) * Europe version no Adjustment INPUT OUTPUT TUNER ALIGNMENT N O . ITEM ALIGN FOR F I G . SETTING SETTING SETTING P O I N T S 98 MHz,1 kHz MOD... -
Page 12: Europe And U.k
RXD-251/301/351/371S/A3 ADJUSTMENT LW SECTION INPUT OUTPUT TUNER ALIGNMENT N O . ITEM ALIGN FOR F I G . SETTING SETTING SETTING P O I N T S 153 kHz 1 kHz, 30% MOD Maximum output 153 kHz T102 60 dBu (ANT INPUT) -
Page 13: Cassette Deck Section
RXD-251/301/351/371S/A3 ADJUSTMENT CASSETTE DECK SECTION INPUT OUTPUT CASSETTE TAPE ALIGNMENT F I G N O . ITEM ALGN FOR SETTINGS SETTINGS DECK SETTINGS PO INT Unless otherwise specified : each ; switch should be set as follows : 0dBs = 0.775V BEAT SW : OFF I. - Page 14 RXD-251/301/351/371S/A3 ADJUSTMENT CD SECTION INPUT OUTPUT PLAYER ALIGNMENT ALIGN ITEM FIG. SETTINGS SETTINGS SETTINGS POINTS On the power from 0.08 to 0.15 mW, Apply the sensor section when the diffraction Press the − − LASER POWER of optical power meter grating is correctly PLAY/PAUSE key.
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Page 15: Display Unit
RUSSIA UNIT RXD-301W DISPLAY UNIT AUDIO UNIT TUNER UNIT CN601 CN601 DESTINATION RXD-351(J,X1,X3,Y1,M1), RXD-A3(K1,P1), COUNTRY ABB. RXD-351 RXD-251 RXD-251 RXD-351 RUSSIA RXD-251(X2,M3), RXD-371S(M2) DESTINATION DESTINATION RXD-351W DESTINATION DESTINATION COUNTRY ABB. COUNTRY ABB. COUNTRY ABB. COUNTRY ABB. JAPAN GENERAL MARKET DESTINATION... -
Page 16: Parts Descriptions
RXD-251/301/351/371S/A3 PARTS DESCRIPTIONS... -
Page 17: Pc Board
PC BOARD (Component side view) TUNER UNIT (K1P1Y1M1X1X2M3X3) TUNER UNIT (E1T1Q1E2T2Q2E3E4) Refer to the schematic diagram for the value of resistors and capacitors. -
Page 18: Schematic Diagram
PC BOARD (Component side view) TUNER UNIT : RXD-371S (M2) C119 JK101 J180 R162 C155 L201 L104 C100B Q114 C113 R133 C101 R134 R150 Q108 C143 L102 R208 C165 D106_2 C116 C103 TC101 C144 R113 R151 Q107 R132 C104 R202 L204 C212 Q110... - Page 19 PC BOARD (Component side view) AUDIO UNIT C413 C408 Q415 Q416 J405 J463 J406 R421 R417 C431 R459 R419 C487 Q409 J445 R455 C411 C457 C463 Q711 J446 R738 C488 CN101 J410 J447 Q418 Q417 C455 C447 R461 Q403 R486 J465 J448 C479...
- Page 20 PC BOARD (Component side view) DISPLAY UNIT PLAY/PAUSE DISC SKIP DISC 1 DISC 2 DISC 3 STOP OPEN/CLOSE R673 CN601 R675 R676 R677 R678 R671 R674 S624 R672 S618 S621 S620 S625 S626 S619 S622 S623 CN601 C628 C605 CN09 Q602 CN604 J651...
- Page 21 TUNER UNIT RXD-351(J,X1,Y1,M1), RXD-A3(K1,P1), RXD-251(X2,M3), RXD-371S(M2) +12V +12V +12V 4.5V(5.0V) RF AMP C121 AM IFT T102 11.5V FM ANT IC101 COIL JK101 L101 C155 C101 3.8V 100P 1000P CF103 75 OHM R118 CF102 4.1V R105 AM/FM CN101 C123 1u50 /MPX 0.7V...
- Page 22 ON: 4.5V SIGNAL LINE OFF: 2.3V R103 R123 R140 C101 R103 R123 R140 C101 COUNTRY ABB. COUNTRY ABB. OFF: 0V RXD-251/301/351/371S/A3 GND LINE EUROPE 68 1/2W 8.2K 3.6K 100u16 EUROPE 68 1/2W 8.2K 3.6K 100u16 +B LINE Q109 RXD-301W RXD-351W...
- Page 23 The value shown in ( ) is the voltage measured at the moment of STOP. MOVE +5.1V OUT3+ OUT3+ RXD-351(J,E1,T1,Y1,M1,X1) (3/5) RXD-301(E3,T2,X3) (3/5) RXD-251/301/351/371S/A3 OUT3- OUT3- RXD-A3(K1,P1) (3/5) +7.6V +7.6V RXD-251(M3,X2) (3/5) RXD-301E(E4)/351E(E2) (3/5) MOTOR Y39-2930-11 RXD-301W(Q2)/351W(Q1) (3/5) RXD-371S(M2) (3/5)
- Page 24 Q714 Q503 RXD-A3(K1,P1) (4/5) safety critical components. For continued protection against risk of fire, R742 C518 1u50 S203 RXD-251(M3,X2) (4/5) CN203 R508 replace only with same type and rating fuse(s). To reduce the risk of electric 11.5V PLAY C242 SW201...
- Page 25 P.B.C. AUTO NTSC PIN No. M13 M16 2a M11 M15 RXD-351(J,E1,T1,Y1,M1,X1) (5/5) RXD-301(E3,T2,X3) (5/5) PIN No. RXD-A3(K1,P1) (5/5) COM0 RXD-251(M3,X2) (5/5) COM1 RXD-301E(E4)/351E(E2) (5/5) M25 8g COM2 RXD-301W(Q2)/351W(Q1) (5/5) M31 8f COM3 +4.7V +4.7V RXD-371S(M2) (5/5) CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts...
- Page 26 VOLUME Gx11 CONTROL VR603 MIC VOL RXD-251 JK601 VR601 RXD-301(X) (E/5) SUPER WOOFER RXD-351(K,P) ORE OUT ANTENNA ø3x12 : N09-1960-05 S701 JK101 ø3x10 : N89-3010-41 AC220 AC110 ~240V ~120V ø3x8 : N89-3008-46 M3x8(BLK) : N35-3008-45 (D/5) ø3x8(BLK) : N89-3008-45 JK301...
- Page 27 Add- Desti- Ref. No Parts No. Description Ref. No Parts No. Description ress nation marks Parts ress Parts nation marks RXD-251/301/301E/301W/351/351E/351W/371S/A5 B10-3451-08 FRONT GLASS(CASSETTE)R B19-1602-08 LED LENS E1E2E3 A01-3676-08 CABINET BLACK B19-1602-08 LED LENS E4T1T2 A01-3677-08 CABINET GRAY K1P1X2 H...
- Page 28 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
- Page 29 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
- Page 30 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
- Page 31 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
- Page 32 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
- Page 33 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
- Page 34 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
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Page 35: Parts List
Add- Desti- MODEL ABB. Australia Canada China England Europe Germany Korea Malaysia Ref. No Parts No. Description ress Parts nation marks RXD-251 D613 B30-2540-08 E4T1T2 RXD-301 D613 B30-2540-08 M1M2M3 D613 B30-2540-08 Q1Q2Y1 RXD-301E D613 B30-2540-08 X1X2X3 RXD-301W IC601 LC867224A-5H71 RXD-351... -
Page 36: Specifications
Tuning frequency range ......... 153 kHz ~ 279 kHz SW Tuner section (XD-371S) Tuning frequency range ........5.95 MHz ~ 17.9 MHz 1. KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. Notes Notes... - Page 37 P.O BOX 55-2791, Piso 6 plaza Chase, Cl. 47 y Aquilino de la Guardia Panama, Republic de Panama KENWOOD ELECTRONICS BRASIL LTDA. Av Indianópolis, 628, 04062-001 Planalto Paullsta São Paulo-SP-Brasil KENWOOD ELECTRONICS U.K. LIMITED KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB., United Kingdom KENWOOD ELECTRONICS BELGUM N.V. Meachelsesteenweg 418, B-1930 Zaventem, Belgium KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrücker Str.