Samsung LW32A23W, Service Manual

Page 1: ...LCD TV Chassis Model VN32EO LW32A23W VN40EO LW40A23W Manual SERVICE LCD TV CONTENTS Block Diagram Wiring Diagram Schematic Diagrams ...

Page 2: ...Block Diagram This Document can not be used without Samsung s authorization Worldwide Full Multi System Block diagram LTN325W LTN406W ...

Page 3: ...Block Diagrams LW32A23W LW40A23W Sound Block diagram ...

Page 4: ...Block Diagrams LW32A23W LW40A23W Video Block diagram ...

Page 5: ...Block Diagrams LW32A23W LW40A23W Power Block diagram ...

Page 6: ...LCD TV 32 40 Power Block diagram Block Diagrams LW32A23W LW40A23W Inverter Power Source ...

Page 7: ...tartup current source normally 8V Power MOSFET source and the circuit reference ground GND Power MOSFET drain Also used during startup as the internal high voltage current source until the external 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...

Page 8: ...voltage The circuit has an overvoltage protection function of the voltage limit type In the event of a sudden interruption of the input of overshooting overload during a sudden change of load or non control status this function protects the circuit by narrowing the ON width of the FET and preventing the voltage from rising above the overvoltage setting The overvoltage can be set with RP834 RP835 R...

Page 9: ...ut voltage decreases no current is drawn from 13 Pin of the resonance circuit and the switching frequency decreases extending the charge period of the resonance condenser and thereby raising the output voltage Protections 1 Overvoltage The output voltage is divided along the resistors and monitored by QI810 If the output voltage rises the QI810 voltage also rises which triggers QO810 to turn PC802...

Page 10: ...es the controlling MIC part saves power consumption through a BCD processor W6800 series changes the operation mode in 3 stages according to the load applied and saves power consumption 1 Pseudo oscillation under load 2 If MBS Multi Bottom Skip frequency exceeds 70 kHz under medium or small loads the bottom is skipped while bottom ON is maintained 3 If TFC Time Fix Control operation extends the ON...

Page 11: ...RTFC MOSFET Drain terminal Not Connect MOSFET Source Ground terminal Control circuit power input terminal Overcurrent detection signal input terminal Bottom detection signal input terminal Voltage control signal input terminal Overload protection detection terminal Fixed ON time adjustment terminal Symbol Functions TSD OVP Thermal Shutdown Circuit Overvoltage circuit ...

Page 12: ... in the overload overcurrent area Bottom is not extended 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 Sub circuit MIC internal reference time On at a Bottom after the Reference Time that starts with ...

Page 13: ...n forcibly outputs to DRV an 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 ...

Page 14: ...he transistor drive winding wire Near the drive winding wire and stand by power source Startup of Vcc Startup resistor Peck charge prevention resistor 5 OCP OLP From the transistor design under medium load with only one bottom left it is possible for Id to exceed 50 of the normal pseudo oscillation duty In particular if there is still a bottom under the maximum load at VinAC Min confirming the con...

Page 15: ...Id increases and the frequency decreases as lp becomes smaller and the ton setting becomes larger 7 Phase Correction When you have an unusual type of secondary feedback circuit and load specifications if the phase correction of the error amp on the secondary circuit is not sufficient due to the capacity of the smoothing input condenser being too small and the ripple voltage being too high you can ...

Page 16: ... GND VCC12BS VCC12BS VCC12BS GND_AMP GND_AMP GND_AMP GND_PANEL TXOUT 1 TXOUT 1 GND_PANEL TXOUT 0 TXOUT 0 GND_PANEL SW_INVERTER ANA_DIMMING PWM_DIMMING CN505 SC1_R_SC1_SVHS_CI SC1_G SC1_B_SC1_SVHS_C0 AGND SC1_CVBS_IN AGND SC1_CVBS_OUT AGND SC2_CVBS_IN AGND SC2_SVHS_CI AGND Y_D1 AGND PB_D1 PR_D1 AGND Y_D2 AGND PB_D2 PR_D2 AGND AGND SC2_CVBS_OUT ANGD SC2_SVHS_CO Y_COMP1 AGND PB_COMP1 PR_COMP1 CN506 Y...

Page 17: ...Q17 31 DQ16 DQ15 85 83 DQ14 82 DQ13 80 DQ12 79 DQ11 22uF 16V 68 CLK 67 CKE 18 CAS_ BA1 23 BA0 22 66 A9 65 A8 C273 60 A3 A2 27 A10 24 A1 26 A0 25 IC204 C271 100nF C270 100nF C269 C268 100nF 100nF 100nF 100nF C267 C266 17 WE_ 84 VSSQ8 78 VSSQ7 VSSQ6 52 46 VSSQ5 VSSQ2 VSSQ1 6 86 VSS4 VSS3 72 VSS2 58 44 VSS1 81 VDDQ8 VDDQ7 75 K4S643232E TC60 35 VDDQ3 VDDQ2 9 3 VDDQ1 43 VDD4 29 VDD3 VDD2 15 VDD1 1 RAS_...

Page 18: ... 57 Communichion Clock Signal 23 IC202 30 H Sync intput Signal 24 IC202 31 V Sync Intput Signal 25 IC202 71 78 2 10 Data Puls Signal 5 IC200 3 Clock Signal 6 IC200 178 Communichion Data Signal 7 IC200 179 Communichion Clock Signal 19 IC202 66 H Sync Output Signal 15 S Video signal CN505 26 Y 28 C IC701 18 Y 19 C ...

Page 19: ...48 R819 100K 1 16W VCC8B C117 10nF C E C306 100nF B C E 2SC2412K Q Q801 B 1K Q804 2SC2412K Q 100 SDAIN 3 STAG_OUTIN 7 6 IN VCC 38 IN VCC1 67 IN VCC2 VSYNC IN 47 R321 RESETIN 1 RX0 IN 90 91 IN RX0 85 IN RX1 RX1 IN 86 RX2 IN 80 81 IN RX2 93 IN RXC RXC IN 94 8 IN SCDT SCLIN IN 74 75 IN QO22 77 IN QO23 QO3 IN 52 53 IN QO4 QO5 IN 54 55 IN QO6 QO7 IN 56 59 IN QO8 QO9 IN 60 99 IN RESERVED 62 63 IN QO12 Q...

Page 20: ... Signal IC101 IC102 14 IC702 18 17 DTV DVD Pb Cb Signal IC101 IC102 15 IC702 17 29 PC Digtal Input Signal 18 19 21 22 24 25 27 28 18 DTV DVD Pr Cr Signal IC101 IC102 4 IC702 16 1 DC 6V 2 DC 5V 26 CN507 PC RGB Signal 8 9 10 27 PC H Sync Input Signal 28 PC V Sync Input Signal 3 DC 3V ...

Page 21: ...PMM C406 1uF 330K R402 C448 100nF C503 100nF 47 R503 VCC5I 100nF C496 C538 100nF 150 T520 1 100nF C4110 R455 16V 100nF C404 C4111 22uF FT412 1 A B 2 3 C 100nF C474 DLL_AV 100nF C430 VCC3A_PPMM PGA3V_1 VCC5C T522 1 RA400 1 2 3 4 5 6 7 8 VCC2 5D_PPMM_1 VIDEO14 C7 VIDEO15 A6 VS_P AF23 AE13 VS_S VIDEO04 M1 VIDEO05 M2 VIDEO06 M3 VIDEO07 M4 VIDEO08 D24 VIDEO09 D25 VIDEO10 C25 VIDEO11 D26 VIDEO12 A7 VIDE...

Page 22: ...Schematic Diagrams 11 IC500 31 Clock Signal 12 IC500 27 H Sync 13 IC500 28 V Sync 14 IC500 37 39 40 Clock Output Signal ...

Page 23: ...D6_SDAT 15 S3C9428X35 S0T8 XOUT 3 XIN 23 P1_0_T0_ZCD 26 P0_7_AD11_PWM0 P0_6_AD10 VSS 1 32 VDD TEST_VPP 4 RESET 7 P3_3 24 P3_2 9 P3_1 25 P3_0 8 AVSS 17 AVREF IC917 P2_5_AD5 P2_4_AD4 14 13 P2_3_AD3 P2_2_AD2 12 P2_1_AD1 11 10 P2_0_AD0 20 P1_3_INT1_PWM1 21 P1_2_INT0 P1_1_BUZ 22 27 P0_5_AD9 28 P0_4_AD8 29 P0_3_CLO 30 P0_2_SI 31 P0_1_SO 5 P0_0_SCK 6 16 3 C 2 B 1 A FT910 16V 10uF C951 C950 100nF STD_VCC5...

Page 24: ... 3 R6147 5 6K C670 MMBD4148SE D601 1 16V 100uF R652 36Kohm VCC12BS 56K R654 C6194 100nF LFB30 3A1E223M FT604 A 1 2 B C 3 C676 47uF R6126 C649 47uF FT602 1 A B 2 C 3 5 1K C6195 220nF 100nF C6197 R674 10K 10K R673 C6175 100uF 16V T615 1 16V 100uF C6174 L606 GND 8 Vcc C666 100uF 1 A B 2 C 3 4 D E 6 F 7 5 10K R6107 IC613 TDA7050T N3 R6108 10K 13 M 14 N 16V 100uF C6204 IN B 3 IN C D 4 IN 5 IN E 6 IN F ...

Page 25: ...DRAM_ADDR2 127 SDRAM_ADDR3 126 SDRAM_ADDR4 SDRAM_ADDR5 124 122 SDRAM_ADDR6 121 SDRAM_ADDR7 120 OUTD_R6 62 OUTD_R7 61 OUTD_R8 60 OUTD_R9 12 OUT_CLK OUT_DENAB 8 5 OUT_DIVCLK 10 OUT_HSYNC 9 OUT_VSYNC 7 SCAN_ENABLE 6 SCAN_MODE OUTD_R1 OUTD_R10 59 58 OUTD_R11 57 OUTD_R12 56 OUTD_R13 55 OUTD_R14 54 OUTD_R15 69 OUTD_R2 OUTD_R3 68 67 OUTD_R4 66 OUTD_R5 64 33 OUTD_G15 49 OUTD_G2 48 OUTD_G3 47 OUTD_G4 OUTD_...

Page 26: ...Schematic Diagrams 8 IC434 205 Clock Signal 9 IC400 IC434 Communichion Data Signal 10 IC400 IC434CommunichionClockSignal ...

Page 27: ...NA1 GINA2 22 21 GINA3 GINA4 20 19 GINA5 18 GINA6 17 GINA7 BOUTA6 61 BOUTA7 66 85 BOUTB0 88 BOUTB1 BOUTB2 89 90 BOUTB3 BOUTB4 91 BOUTB5 92 BOUTB6 93 94 BOUTB7 117 BINB3 BINB4 116 115 BINB5 BINB6 114 113 BINB7 BOUTA0 53 54 BOUTA1 BOUTA2 57 58 BOUTA3 BOUTA4 59 60 BOUTA5 34 BINA0 BINA1 33 BINA2 32 31 BINA3 BINA4 30 29 BINA5 BINA6 28 25 BINA7 BINB0 122 121 BINB1 BINB2 118 S5D2540X IC510R 1 ACCE_EN TP3 ...

Page 28: ... dcjhp_10p 4 2 3 TP313 1 RLZ8 2 D148 1 1 2 3 R106 75 19 20 21 22 23 24 RLZ8 2 D154 9 10 11 12 13 14 15 16 17 18 CN143 dcon24p_j 1 2 3 4 5 6 7 8 RLZ8 2 D115 1 2 3 TP356 1 D184 BZX84C5V1 1 2 3 GND_3 2 SIG_1 3 SIG_2 SIG_3 5 SIG_4 6 8 SIG_5 9 SIG_6 SIG_5 9 SIG_6 jack9p_b SK8 1 GND_1 GND_2 4 7 1 GND_1 GND_2 4 7 GND_3 2 SIG_1 3 SIG_2 SIG_3 5 SIG_4 6 8 1 jack9p_b SK9 TP355 1 TP330 TP354 1 FT109 A 1 B 2 S...

Page 29: ...LW32A23W LW40A23W Schematic Diagrams 1 DC 6V ...

Page 30: ...4 5 6 7 8 9 10 11 1 SUPLVAL CN129 1 1 TP8 1 TP9 TP6 1 TP7 A 1 B 2 STD_VCC3B TP4 1 FT133 C134 100uF FT134 A 1 2 B 3 C 2 B 16V 22uF C132 STD_VCC5B 1 B 2 C 3 FT118 1 A 1 B 2 C 3 STD_VCC5B FT115 A TP16 1 FT116 A C E TP5 1 R168 Q103 2SC2412K Q B 1 1 16W 330 10 TP10 1 TP11 CN131 1 2 3 4 5 6 7 8 9 1 16W 22 slcon10p BUZER_IN CH _OUT VOL _OUT SOURCE_OUT MENU_OUT IR LED_GRN LED_RED IR R170 AGND AGND LED_RED...

Page 31: ...LW32A23W LW40A23W Schematic Diagrams 1 DC 6V ...

Page 32: ...Schematic Diagrams D009 D014 D012 D010 This Document can not be used without Samsung s authorization Inverter Block Schematic Diagram ...

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Page 34: ...Schematic Diagrams D013 D014 D021 D015 D016 This Document can not be used without Samsung s authorization Multi Block Schematic Diagram ...

Page 35: ...LW32A23W LW40A23W Schematic Diagrams D013 D014 D015 D016 D021 ...

Page 36: ...Schematic Diagrams D018 D017 This Document can not be used without Samsung s authorization PFC Block Schematic Diagram ...

Page 37: ...LW32A23W LW40A23W Schematic Diagrams D017 D018 ...

Page 38: ...Schematic Diagrams D019 D020 This Document can not be used without Samsung s authorization SUB Block Schematic Diagram ...

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