Sherwood RX-4109B/B Service Manual
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Sherwood RX-4109B/B Service Manual

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Summary of Contents for Sherwood RX-4109B/B

  • Page 2: Block Diagram

    BLOCK DIAGRAM Model : RX-4109B/B...

  • Page 3: Wiring Diagram

    WIRING DIAGRAM Model : RX-4109B/B PCB1(MAIN) PCB2-1 (POWER S/W) PCB2(FRONT) PCB1-1(H/P) PCB2-2 (SPK A/B)

  • Page 4: Circuit Description

    CIRCUIT DESCRIPTION UPD78F0502M(T)5A4-A: IC301 1. Pin Description PROTECT KEY2 VOL_DN KEY1 VOL_UP REMOCON Avref P_CHECK FLT & PLL CLK RESET PLL_DI FLMDO FLT &PLL DA_OUT VREC FUNC_DA TREC FUNC_CLK REGC FLT_CE PLL_CE FUNC_CE ST/BY_RLY & FLT B+ TUNED L_MUTE ST/BY_LED...
  • Page 6 3. Pin Functions Pin Name Opeation Description Pin No. Assign Input for detecting Protect in (High → Power off) Protection "PROTECTION" condition. Volume_Encoder A Input for main volume up/down. Volume encoder up/down Volume_Encoder B Input for main volume up/down. Volume encoder up/down Remote control Input for remocon data.

  • Page 7: Tuner Alignment

    TUNER ALIGNMENT 1. Electrical specification. SPECIFICATION ITEMS Above the receiving Frequency Local OSC 522 ~1620kHz 87.5 ~ 108.0MHz Frequency cover range 12 +/-0.5V Standard supply voltage 75 ohm unbalance FM Antenna Impedance 9.5uH ( 1kHz ) : S0160BL-25 AM Loop Antenna 2.

  • Page 8: Troubleshooting

    TROUBLESHOOTING Symptom Cause and Remedy Ref NO. 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 (101 ) D) Connector's disconnection or disjuction.
  • Page 9 Symptom Cause and Remedy Ref NO. Remote Controller Failure. A) Battery check. B) RMC I.C inferior. 1. RMC IC B+( 5 )V check. REM401 2. RMC clock pulse check. IC301 ( 4 ) FM Failure. A) FM MUTE adjustment inferior. B) FRONT-END inferior.
  • Page 10 ★ MECHANICAL PARTS LIST ( RX-4109B/B ) ♣ Parts without Parts No. are not supplied. DESCRIPTION Q'TY PARTS No. PACKAGE INSTRUCTION MANUAL 5707000000880S WARRANTY CARD 5727000000200S BOX,INNER CARTON 60170401212F0S CUSHION, SNOW 6230043714010S PE,SHEET (750*1460/SET) 6327040059000S POLY BAG, 330*240*0.05 6337040062010S REMOCON, RC107(KOR3551B)
  • Page 11 WINDOW, DISPLAY 5077210653040S BUTTON, 4KEY 5090211461100S BUTTON, 4KEY 5090211461100S BUTTON, 3-KEY 5090211441000S BUTTON, POWER TACT 5090211431000S BUTTON, SPKR 5090211451000S BADGE, SHERWOOD(GOLD) 5637210031010S INDICATOR, GUIDE LED 5160041003010S KNOB, VOLUME 5080210281000S CHASSIS, MAIN 3200200026020S CHASSIS, BACK 3207210866D00S CABINET, COVER TOP 3007041236060S FOOT, GOLD H/STAMPING/ASSY...

  • Page 12: Exploded View

    EXPLODED VIEW Model : RX-4109B/B...
  • Page 13 ★ ELECTRICAL PARTS LIST (RX-4109B/B) ♣ Parts without Parts No. are not supplied. REF No. DESCRIPTION Q'TY PARTS No. PCB1 ASSEMBLY P.C.BOARD MAIN 7025HK0707010 CAPACITORS C103L/R ELECT GE 85C 4.7 uF D0404R7087250S C106L/R ELECT GE 85C 4.7 uF D0404R7087250S C107L/R CERAMIC CHIP T.C...
  • Page 14 REF No. DESCRIPTION Q'TY PARTS No. C528 ELECT GE 85C 10 uF D040100087070S C529 ELECT GE 85C 3.3 uF D0403R3087050S C530 ELECT GE 85C 100 uF D040101084060S C535 FILM POLYESTER 0.047 uF D02047306C060S C536 ELECT GE 85C 470 uF D040471085210S C542 CERAMIC HIK AXIAL 0.047 uF...
  • Page 15 REF No. DESCRIPTION Q'TY PARTS No. Q102/Q103 KRA107S(PH), PNP J5200107S0050S Q104L/R KTC2875B(MB), NPN J5222875B0010S Q201/Q202 KTC3198Y, NPN J5023198Y0000S Q203 KTA1266Y, PNP J5001266Y0050S Q301 KRC103S(NC), NPN J522010300210S Q302L/R KSA992F, PNP J5000992F0050S Q303L/R KSA992F, PNP J5000992F0050S Q304L/R KTC3200BL, NPN J5023200B0050S Q308L/R KTC3200BL, NPN J5023200B0050S Q313/Q314 KRC107M, PNP...
  • Page 16 REF No. DESCRIPTION Q'TY PARTS No. R313L/R CARBON FILM 1.5 kohm 1/5W C00001526P520S R314L/R CARBON FILM 2.7 kohm 1/5W C00002726P520S R315L/R METAL FILM 100PPM 5.6 kohm C060056265050S R316L/R METAL FILM 100PPM 5.6 kohm C060056265050S R317L/R METAL FILM 100PPM 4.7 ohm 1/4W C0604R7063050S R318L/R...
  • Page 17 REF No. DESCRIPTION Q'TY PARTS No. RLY501 RELAY, DC9V 250V/5A G680090102010S FPC101 CN.FPC 1.25MM (17P) L131111700010S FUSE101 FUSE, T6.3A/250V N751226301110S GT4-GT6 TERMINAL 3790040886000S J100-J106 CN,WIRE 1P L045084006040S J108-J112 CN,WIRE 1P L045084006040S J115-J125 CN,WIRE 1P L045084006040S J127-J146 CN,WIRE 1P L045084006040S J165-J168 CN,WIRE 1P L045084006040S J170-J173...
  • Page 18 REF No. DESCRIPTION Q'TY PARTS No. PCB1-2 ASSEMBLY P.C.BOARD GUIDE-R CLAMP1 CLAMP 4330000120000S J708-J712 CN,WIRE 1P L045084006040S PCB1-3 ASSEMBLY P.C.BOARD GUIDE-L J701-J706 CN,WIRE 1P L045084006040S PCB1-4 ASSEMBLY P.C.BOARD PHONO C700L/R CERAMIC CHIP T.C 100 pF D010101167160S C701L/R CERAMIC CHIP T.C 100 pF D010101167160S C702L/R...
  • Page 19 REF No. DESCRIPTION Q'TY PARTS No. IC400 SC16315, LINEAR-DRIVER J127163150010S J400 CN,WIRE 1P L045084006040S J401/J402 CHIP THICK 0 ohm 1/8W C200000061300S J403/J404 CN,WIRE 1P L045084006040S J405-J407 CHIP THICK 0 ohm 1/8W C200000061300S J408 CN,WIRE 1P L045084006040S J409/J410 CHIP THICK 0 ohm 1/16W C20000006M160S J411/J412...

  • Page 20: Schematic Diagrams

    SCHEMATIC DIAGRAMS(1) PCB1(MAIN) L-OUT R-OUT +12V TUNED PLL_DO PLL_CLK PLL_DI PLL CE 1.EXCLK 2.FLMDO 3.VOD 4.VSS 5.RST 6.TXD 7.RXD 8.P31 9.P32 PCB1-4(PHONO) Model : RX-4109B/B...
  • Page 21 SCHEMATIC DIAGRAMS(2) Model : RX-4109B/B PCB2-1 PCB2-2(SPK A/B) (POWER S/W) PCB2(FRONT)
  • Page 22 SCHEMATIC DIAGRAMS(3) TUNER ASS'Y Model : RX-4109B/B...

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