Samsung LW32A23W Service Manual
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Samsung LW32A23W Service Manual

Samsung LW32A23W Service Manual

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SERVICE
LCD-TV
LCD-TV
Chassis
Model
VN32EO
LW32A23W
VN40EO
LW40A23W
Manual
CONTENTS
Block Diagram
Wiring Diagram
Schematic Diagrams

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Summary of Contents for Samsung LW32A23W

  • Page 1: Service Manual

    LCD-TV Chassis Model VN32EO LW32A23W VN40EO LW40A23W SERVICE Manual LCD-TV CONTENTS Block Diagram Wiring Diagram Schematic Diagrams...

  • Page 2: Block Diagram

    Block Diagram This Document can not be used without Samsung’s authorization. Worldwide Full Multi-System Block diagram LTN325W/LTN406W...
  • Page 3 Block Diagrams Sound Block diagram LW32A23W/LW40A23W...

  • Page 4: Video Block Diagram

    Block Diagrams Video Block diagram LW32A23W/LW40A23W...

  • Page 5: Power Block Diagram

    Block Diagrams Power Block diagram LW32A23W/LW40A23W...
  • Page 6 Block Diagrams LCD-TV 32”, 40” Power Block diagram LW32A23W/LW40A23W...

  • Page 7: Pin Functions

    VDD capacitor is charged. Feedback input.Operating voltage range of 0V ~1V.Determined by the maximum MOSFET current value. The current limit in due consideration of the maximum drain current is included in the FB pin that is connected to the source pin. LW32A23W/LW40A23W...
  • Page 8 Although the IC has a thermal shutdown function, a thermistor (TH) is installed on the heat-radiating fin of the main FET and the circuit is stopped if overheated by overload, etc. FET VDS Waveform (Input of 100V) FET VDS Waveform (Input of 230V) LW32A23W/LW40A23W...
  • Page 9 If the voltage exceeds the set value, the pulse width is narrowed to limit the current. 3. Thermal Shutdown The resonance IC has a built-in thermal shutdown function and stops oscillation at over 125 ˚C FET VDS Waveform of the resonance circuit LW32A23W/LW40A23W...
  • Page 10 2. Major Features 1) Embedded overcurrent protection (OCP) of pulse by pulse 2) Embedded overload protection (OLP) of latch shut down. 3) Embedded thermal shutdown function. 4) Embedded overvoltage protection for input voltage 5) Adjustable frequency for TFC operation LW32A23W/LW40A23W...

  • Page 11: Terminal Functions

    Control circuit power input terminal OCD/BD Overcurrent detection signal input terminal / Bottom detection signal input terminal FB/OLP Voltage control signal input terminal / Overload protection detection terminal RTFC Fixed ON time adjustment terminal Other Functions Symbol Functions Thermal Shutdown Circuit Overvoltage circuit LW32A23W/LW40A23W...
  • Page 12 If the overload condition continues, OLP will be triggered to shut down the operation. Normally ,it is not counted during startup, and if the down edge is detected only once after a count of 2, it is considered abnormal and the oscillation is stopped. LW32A23W/LW40A23W...
  • Page 13 ON time (T2) that is longer than the fixed Ton (T1) inside the MIC to control the OFF time for stabilizing the output voltage. If MBS operation under light load moves toward the light load area again, the MBS operation is released at Ton=350 us and shifted to the TFS operation. 3. OLP LW32A23W/LW40A23W...
  • Page 14 50%of the normal pseudo oscillation duty.In particular,if there is still a bottom under the maximum load at VinAC (Min), confirming the condition is required. The following is an explanation of the pseudo oscillation signal input of the OCP/BD terminal. LW32A23W/LW40A23W...
  • Page 15 FB/OLP terminal of W6800 and S/GND. The FB/OLP terminal is fitted with latch delay CR.If R is small, it may improve the shift start during startup,but may also cause extreme delay. Therefore ,care should be taken to avoid excessive response in changing the loads. LW32A23W/LW40A23W...

  • Page 16: Wiring Diagram

    Wiring Diagram CN510 VCC12A CN800 VCC5A VCC5A VCC5A VCC12BS VCC12BS VCC12BS GND_AMP GND_AMP GND_AMP CN506 CN509 CN505 CN507 CN508 LW32A23W/LW40A23W...

  • Page 17: Schematic Diagrams

    Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. DPTV, VPC3230, MST 9883 Block Schematic Diagram OPTION VCC3D_DPTV C256 C257 C258 C259 C260 FT203 33pF 33pF 33pF 33pF 33pF LFB30-3A1E223M VCC3D_DPTV VCC3D_DPTV FT204 VCC2.5D_DPTV DG_DPTV DG_DPTV MD(0:63)
  • Page 18 Schematic Diagrams S-Video signal,CN505,#26(Y),28(C), CVBS Signal IC200,#3 Clock Signal IC200,#178 Communichion Data Signal IC200,#179 Communichion Clock Signal IC202,#66,H-Sync Output Signal IC701,#18(Y),19(C) IC202,#64,H-Sync Output Signal IC202,#56 Communichion Data Signal IC202,#57 Communichion Clock Signal IC202,#30 H-Sync intput Signal IC202,#31 V-Sync Intput Signal IC202,#71~78, 2~10 Data Puls Signal...
  • Page 19 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. Power, DVI, Tuner Block Schematic Diagram STD_VCC6A STD_VCC5B VCC5DDC STD_VCC3B VCC5B STD_VCC3B VCC3DuP FT300 FT830 FT831 FT832 FT833 FT834 IC801 BA033FP RA308 VCC2.5AuP POR(0:7) POR7 POR6 NO USE IN ASIA,USA...
  • Page 20 Schematic Diagrams S-Video signal,CN505,#26(Y),28(C), DTV,DVD,Y Signal DTV,DVD,Pb(Cb) Signal DC 6V DC 5V DC 3V IC701,#18(Y),19(C) IC101,IC102,#14,IC702,#18 IC101,IC102,#15,IC702,#17 DTV,DVD,Pr(Cr) Signal PC Digtal Input Signal CN507 PC RGB Signal #8,9,10 PC H-Sync Input Signal PC V-Sync Input Signal IC101,IC102,#4,IC702,#16 #18,19,21,22,24,25,27,28...
  • Page 21 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. PPMM (Sub Scaler) Block Schematic Diagram VCC3D_PPMM FT500 FT501 FT502 CHI MEI OPTION VCC2.5D_PPMM_1 VCC2.5D_PPMM PGA3V_1 VCC3A_PPMM CN512C slcon3p BL ON/OFF FT409 FT410 GND_LVDS VCC3D_PPMM_1 VCC2.5D_PPMM_1 DIMMING VCC3D_PPMM...
  • Page 22 Schematic Diagrams IC500,#31 Clock Signal IC500,#27 H-Sync IC500,#28 V-Sync IC500,#37,39,40 Clock Output Signal...
  • Page 23 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. MICIOM Block Schematic Diagram VCC3DuP FT911 MCAD(0:7) MCAD(0:7) LFB30-3A1E223M IC901 MCA(0:19) M27W401-80K6TR DGND C916 C915 STD_VCC5B 10uF 100nF MCA(0) MCA(1) MCA(2) L904 VCC3DuP MCA(3) DGND DGND VCC2.5AuP MCA(4) 3.3UH...
  • Page 24 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. Sound Block Schematic Diagram VCC12BS VCC12B FT600 LFB30-3A1E223M VCC12B FT640 LOUT FT601 C646 LFB30-3A1E223M 10uF C647 ROUT 100nF SROUT R6112 IC603 C606 SLOUT NJM4580E C6189 4.7uF SGND SGND...
  • Page 25 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. DNIe Block Schematic Diagram SNI_3.3V SNI_3.3V FT461 FT462 LFB30-3A1E223M LFB30-3A1E223M C4201 C4202 C4203 C4204 C4205 C4206 C4207 C4208 C4209 C4210 C4211 C4212 C4213 C4214 C4215 C4216 C4217 C4218...
  • Page 26 Schematic Diagrams IC434,#205 Clock Signal IC400,IC434 Communichion Data Signal IC400,IC434 Communichion Clock Signal...
  • Page 27 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. RTA ACCE Option Block Schematic Diagram VCC3D_PPMM FT543R FT542R FT541R GND_LVDS C561R 22uF C553R C554R C555R C556R C557R C558R C559R C560R 22uF 22uF 100nF 100nF 100nF IC516R VCC1.8_RTAD VCC1.8_RTAA...
  • Page 28 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. Input Board Schematic Diagram VCC5B STD_VCC3B VCC5DDC STD_VCC5B STD_VCC6A FT100 FT929 FT102 FT928 FT927 CN136 dcon30p_j SW_SMPS TP305 TP306 TP308 TP309 CH+_OUT TP310 Component1 Input Component1 Audio Input...
  • Page 29 Schematic Diagrams DC 6V LW32A23W/LW40A23W...

  • Page 30: Function Board

    Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. Power Switch Schematic Diagram FUNCTION BOARD STD_VCC6A STD_VCC5B STD_VCC3B FT114 FT115 FT116 STD_VCC5B STD_VCC3B AGND SUPLVAL FT134 CN129 SW_SMPS CN131 slcon10p REMOCON IR R168 R167 STANDBY POWER 1/16W...
  • Page 31 Schematic Diagrams DC 6V LW32A23W/LW40A23W...
  • Page 32 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. Inverter Block Schematic Diagram D009 D014 D012 D010...
  • Page 33 Schematic Diagrams D009 D010 D012 D014 LW32A23W/LW40A23W...
  • Page 34 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. Multi Block Schematic Diagram D013 D014 D015 D021 D016...
  • Page 35 Schematic Diagrams D013 D014 D015 D016 D021 LW32A23W/LW40A23W...
  • Page 36 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. PFC Block Schematic Diagram D017 D018...
  • Page 37 Schematic Diagrams D017 D018 LW32A23W/LW40A23W...
  • Page 38 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. SUB Block Schematic Diagram D019 D020...
  • Page 39 Schematic Diagrams D019 D020 LW32A23W/LW40A23W...

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