海信液晶电视机5275电源板电路原理图_E(2)

2

T902 W817

1N4148W

R903 10k

3

M826 M828

1

2

1

1

1

1

1 1

1 2 3 4 5BCK-25-1605 C902 100n/50V

10 9 8 7 6

VD903

2MUR160 VD904

W818 C906 220n/AC275V

2R904 68R VD902 R905 22R MUR160 VD905 C901 C903 22n/1000V 22n/630V(NC) C905

1

V902 FQPF8N80C

1MUR160

2

1 2 3 4XP901

C

N1P1+ N2P2+

2

C

2

11N4148W R906 10k

1 3

VD906

2220n/450V MUR160

1

R930 270k R931 270k

R932 270k R933 270k

C907 220n/AC275V

R954 0R

ISNSR938 5.1R 1% R939 5.1R 1%

W823 R940 5.1R 1% R941 47R 1%

VD914

2 3 1BAV70L_KDS184 VD907 R965 0R

UVS3 1R934 20k V904 MMBT2222A C925 1n/50V C926 1n/50V

2

11N4148W R936 3.3k

2

R937 3.3k

VDD 2D_PWMR914 4.7k R970 R907 R910 47k R911 100k R916 20k N901 LX27901 R924 1k

VD909

1 3

21N4148W

3D_ENAR925 10k

1C919 100n/50V

12V_VCC0RB

110R R908

VIN

VDD

16 15 14 13 12 11R919 2k R967 0R

239k

2

V906 MMBT2222A

ENABLE AOUT C_R BRTA DIM SST FAULT UVS GND BOUT COUT COMP ISNS VSNS

B

3 4R913

3D_PWMR926 1k

V907 MMBT2907ALT1 2 3

PWM_DIM

W807 R968

1R928 10k V908 MMBT2222A 1

PWM_DIM0R 2k

5 6 7

3D_ENA ISNSR927 10k

10 9 2R950 100k C916 C915 VD908 6.8n/50V 4.7n/50V 1N4148W R923 C927 2k(NC) 4.7n/50V R920 1k 1% R922 20k(NC) R921 10k V905 C917 10n/50V(NC)

UVS8R909 10k R915 10k R912 100k(NC)

C920 100n/50V

3

C908 1u/50V

C909 1u/50V

C910 220p/50V

1

C912 C911 100n/50V 10n/50V

R917 47k

C913 1n/50V

C914 10n/50V

3D_ENA1R944 47k C918 100n/50V

R972 0R

2

R969 0R

2

3

R929 C921 47k 220p/50V

2N7002K

3D_ENA 3D_PWM

XP903 1 2 3

A

A

Title<Title> Size A2 Date: Document Number<Doc> Friday, April 25, 2014 Sheet 1 of 1 Rev<RevCode>

5

4

3

2

1

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