Sherwood RX-4109 Service Manual
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Sherwood RX-4109 Service Manual

Am/fm stereo receiver
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SERVICE MANUAL

RX-4109
AM/FM STEREO RECEIVER
¢ Å
CONTENTS
- ELECTRICAL PARTS LIST
- IC'S FUNCTIONAL BLOCK DIAGRAM
¢ Å

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Summary of Contents for Sherwood RX-4109

  • Page 1: Table Of Contents

    SERVICE MANUAL RX-4109 AM/FM STEREO RECEIVER ¢ Å ¢ Å CONTENTS - BLOCK DIAGRAM - MECHANICAL PARTS LIST - WIRING DIAGRAM - EXPLODED VIEW - CIRCUIT DESCRIPTION - ELECTRICAL PARTS LIST - TROUBLESHOOTING - IC'S FUNCTIONAL BLOCK DIAGRAM - TUNER ALIGNMENT...

  • Page 2: Block Diagram

    BLOCK DIAGRAM MODEL : RX-4109 LC75343 HEADPHONE TV/AUX MAIN TAPE SPEAKER A PHONO TONE MAIN VOLUME MUTE SPEAKER B TUNER PACK PROTECTION TAPE OUT MAIN TRANS AUX OUT +15V +15V T_MUTE AGND PLL_DO PLL_CL -15V -15V PLL_CE PLL_DI TUNED FL FILAMENT...

  • Page 3: Wiring Diagram

    WIRING DIAGRAM MODEL : RX-4109 CP405 PCB1-1 PCB2-2 (POWER S/W) (S/W B'D) CN401 29P CN500 CN402 CP402 CP403 CP404 CN404 PCB2(FRONT) PCB1-2(H/P) PCB2-1 CN406 CN301 (SPK A/B) HEAT SINK CP301 CP210 CP401 29P FPC Card Cable CN700 CP406 POWER CP501A...

  • Page 4: Circuit Description

    CIRCUIT DESCRIPTION CXP82532-344Q : IC401 1. Pin Description G1/A1 G0/A0 PCHECK JOG_A RDS_CL JOG_B RDS_DATA OPEN OPEN TUNED OPEN STEREO OPEN DIGILINK OPEN T_MUTE OPEN PLL_DO OPEN PLL_CL OPEN PLL_DI OPEN PLL_CE OPEN OPEN OPEN FUNC_CE OPEN FUNC_DA OPEN FUNC_CL OPEN PROTECT OPEN...
  • Page 6 3. Pin Functions Pin No. Pin Name Opeation Description Assign Grid FL PORT FL GRID Grid FL PORT FL GRID AC CORD ON/OFF CHECK(LOW=AC Power Check Input for power down. CORD OFF) Volume_Encoder A Input for main volume up/down. Volume encoder up/down RDS_CLK Output for RDS clock of TDA7330 RDS CLOCK...
  • Page 7 Pin No. Pin Name Opeation Description Assign XTAL Output for 10MHz crystal oscillator. Ground Ground Ground Ground +5V power supply VFDP -30V Supply Speaker"A" relay Output for Speaker Relay "A"ON/OFF Speaker"B" relay Output for Speaker Relay "B"ON/OFF 48 ~ 69 SEGMENT FL PORT FL SEGMENT SEGMENT FL PORT...

  • Page 8: Troubleshooting

    TROUBLESHOOTING Cause and Remedy Ref NO. Symptom Power On Failure. A) AC-Cord check. 1. FLT does not light up. B) Power Trans ( Main/ST-BY ) check. 2. ST-BY LED does not light up. C) Fuse's disconnection check. FUSE ( 501 ) D) Connector's disconnection or disjuction.
  • Page 9 Cause and Remedy Ref NO. Symptom 3. RIGHT Channel dead. C) Speaker wire's disjuction. Close insertion of the speaker wire. D) Signal switching IC check. I.C ( 101 ) 1. IC voltage check ( +10 )V I.C Pin No. ( 35 ) 2.

  • Page 10: Tuner Alignment

    TUNER ALIGNMENT 1. Electrical specification. SPECIFICATION ITEMS Above the receiving Frequency Local OSC 522 ~ 1611kHz 87.5 ~ 108.0MHz Frequency cover range( E/RDS ) 520 ~1710kHz 87.5 ~ 108.0MHz Frequency cover range( K ) 15.0(±1.5V) Standard supply voltage 75 ohm FM Antenna input Impedance 11.5uH ( 2.52MHz ) AM Loop Antenna...

  • Page 11: Mechanical Parts List

    ¡ Ú MECHANICAL PARTS LIST (RX-4109) ¢ À Parts without Parts No. are not supplied. DESCRIPTION Q'TY PARTS No. VER. PACKAGE INSTRUCTION MANUAL 5707000000440S INSTRUCTION MANUAL 5707000000450S INSTRUCTION MANUAL 5707000000460S WARRANTY CARD 5727040540021S E ONLY BOX, INNER CARTON 60170401212F0S BOX, INNER CARTON...
  • Page 12 DESCRIPTION Q'TY PARTS No. VER. FOOT, H/S ASS'Y 4007040201040S FOOT, PL 4000040201010S HOLDER 432004078301AS SPACER, KNOB 4300040561010S HEAT SINK 2120210438100S HEAT SINK REG TR 2120044298010S FELT, STRIP 2690040057010S ENCODER S/W G121162430400S TACT S/W G180000270010S DISPLAY, FLT K530121300010S JACK D6.5 G402040161330S STOPPER, DACH-1 4380040162010S CORD ASS'Y, 2.5A/250V...

  • Page 13: Exploded View

    EXPLODED VIEW Model : RX-4109...
  • Page 14 ELECTRICAL PARTS LIST (RX-4109) ¢ À Parts without Parts NO are not supplied. DESCRIPTION REF No. Q'TY PARTS No. VER. PCB1 ASSEMBLY P.C.BOARD MAIN 7025HK0015100 PCB1 ASSEMBLY P.C.BOARD MAIN 7025HK0015110 CAPACITORS C101L/R CERAMIC HIK AXIAL 220 pF D005221277520S C102 CERAMIC HIK AXIAL 0.047 uF...
  • Page 15 DESCRIPTION REF No. Q'TY PARTS No. VER. C505-C508 FILM POLYESTER 0.047 uF 100V D02047306C060S C509/C510 ELECT GE 85C 6800 uF D040682088010S C511 ELECT GE 85C 1 uF D040010087150S C512 ELECT GE 85C 470 uF D040471084130S C513 ELECT GE 85C 1 uF D040010087150S C514 CERAMIC AC(SAFETY)
  • Page 16 DESCRIPTION REF No. Q'TY PARTS No. VER. DZ201 MTZJ5.1B-0.5W, ZENER K06005R144520S DZ210 MTZJ9.1B-0.5W, ZENER K06009R144520S DZ301 MTZJ4.3B-0.5W, ZENER K06004R344520S DZ501 MTZJ15B-0.5W, ZENER K06015R044520S DZ502 MTZJ4.3B-0.5W, ZENER K06004R344520S DZ513 MTZJ30B-0.5W, ZENER K06030R044520S INTEGRATED CIRCUITS IC101 LC75343M, LINEAR EQ J123753430010S IC501 KIA7805API, LINEAR-REGULATOR J126780500110S IC502 KIA7815API, LINEAR-REGULATOR...
  • Page 17 DESCRIPTION REF No. Q'TY PARTS No. VER. R211 CARBON FILM 1 kohm 1/5W C00001026P520S R304L/R CARBON FILM 220 ohm 1/5W C00002216P520S R305L/R CARBON FILM 33 kohm 1/5W C00003336P520S R306L/R CARBON FILM 10 kohm 1/5W C00001036P520S R307L/R CARBON FILM 470 kohm 1/5W C00004746P520S R308L/R...
  • Page 18 DESCRIPTION REF No. Q'TY PARTS No. VER. R605L/R CARBON FILM 100 ohm 1/5W C00001016P520S R606 CARBON FILM 1 kohm 1/5W C00001026P520S R606L/R CARBON FILM 1 kohm 1/5W C00001026P520S R607 CARBON FILM 1 kohm 1/5W C00001026P520S R325L/R CARBON FILM 33 kohm 1/5W C00003336P520S MISCELLANEOUS...
  • Page 19 DESCRIPTION REF No. Q'TY PARTS No. VER. RLY501 RELAY, DC9V 250V/5A G680090102010S T502 POWER TRANS, 230V/50Hz 8200280150260S T502 POWER TRANS, 220V/50,60Hz 8200280150270S HEAT SINK, REG TR(24X45) 2120044298010S SCREW, +2S 3*8 B-TYPE ZNW/BH B020030081B10S TER, RCA 4PIN G60240045003AS TER, RCA 6PIN G603600460030S TER, BOARD SCREW 8P G614801A0600YS...
  • Page 20 DESCRIPTION REF No. Q'TY PARTS No. VER. CN402 CN,WIRE 100MM (3P) L000101030130S CN404 CN,WIRE 100MM (2P) L000101020120S CN406 CN,WIRE 370MM (2P) L000371020040S CP405 CN.WAFER 2.5MM (2P) L102526800200S D401-D403 1SS133T, SWITCHING K000013300520S DZ401 MTZJ6.2B-0.5W, ZENER K06006R244520S DZ402 MTZJ5.1B-0.5W, ZENER K06005R144520S FLT401 DISPLAY, FLT K530121300010S FPC401...
  • Page 21 DESCRIPTION REF No. Q'TY PARTS No. VER. R456/R457 CARBON FILM 4.7 kohm 1/5W C00004726P520S R461 CARBON FILM 100 ohm 1/5W C00001016P520S R463 CARBON FILM 6.8 kohm 1/5W C00006826P520S R465 CARBON FILM 390 ohm 1/5W C00003916P520S R466 CARBON FILM 39 kohm 1/5W C00003936P520S R497...
  • Page 22 DESCRIPTION REF No. Q'TY PARTS No. VER. R707L/R CARBON FILM 100 kohm 1/5W C00001046P520S R708L/R CARBON FILM 100 ohm 1/5W C00001016P520S TER, RCA 2PIN G601206B0301YS 9/9Pa g e...
  • Page 25 SCHEMATIC DIAGRAMS(1) Model : RX-4109 PCB1(MAIN) PCB3(PHONO)
  • Page 26 SCHEMATIC DIAGRAMS(2) Model : RX-4109 PCB2(FRONT)

  • Page 27: Schematic Diagrams

    SCHEMATIC DIAGRAMS(3) Model : RX-4109 TUNER ASS'Y(E/RDS only)
  • Page 28 SCHEMATIC DIAGRAMS(4) Model : RX-4109 TUNER ASS'Y(K Only)

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