P A I N E L P R I N C I P A L : B U Ff E R D E V Í D E - Philips MDV435K Service Manual

PAINEL PRINCIPAL - BUFFER DE VÍDEO PARA MDV435
1
Main Board: Video Buffer for MDV435/37, MDV436/37
A
R103 R104 R105
150/1% 150/1%
75/1%
VGND
1/2 current config
V+5V
B
R108
75(1206)
CVB1 Q12
B
8550(DIP)
VGND
R110 NC
V+5V
C
R112
75(1206)
G/Y Q14
B
8550(DIP)
VGND
R114 NC
D
1
2
VVCC3
CVB1
TV_DAC0 2 VGND
G/Y
TV_DAC3 2
B/U
TV_DAC4 2
R/V
TV_DAC5 2
R106
VVCC3
VGND
150/1%
VGND
1/2 current config
C77 10PF
L30 1UH CVB1_1
C79 C80
100PF 100PF R/V
VGND
C83 10PF
L32 1UH G/Y1
C85 C86
100PF 100PF
VGND
VIDEO DAC R107 R110 R111
Full Current 390 0 0
Half Current 680 NC NC
2
3 4
C73 NC
V_BIAS 2
C74 0.1UF
TV0
CVB
C75 0.1UF
V_COMP 2
CVB
C76 0.1UF
V_REF 2
R107 680/1%
V_FSADJ 2
CVB
V+5V
R109 C78 10PF
75(1206)
L31 1UH
Q13 C81
B
8550(DIP) 100PF
VGND
VGND
R111 NC
V+5V
R113 C84 10PF
75(1206)
L33 1UH
B/U Q15 C87
B
8550(DIP) 100PF
VGND
R115 NC
R114 R115 R104 R105 R106
Actual value:37.5R
0 0 75 75 75
NC NC 150 150 150
3 4
5
TV3 TV4 TV5
Y Cb Cr
Y C
CVB
(S-Video) (S-Video)
G B R
R/V1
C82
100PF
B/U1
C88
100PF
VGND
5
MDV435 21
6
C73 A3 A
C74 A3
C75 A3
C76 A3
C77 B1
C78 B4
C79 B1
C80 B2
C81 B3
C82 B4
C83 C1
C84 C4
C85 C1
C86 C2
C87 C4
C88 C4
L30 B1
L31 B4
L32 C1
L33 C4
B
Q12
B1
Q13 B3
Q14 C1
Q15 C3
R103 A1
R104 A1
R105 A1
R106 A1
R107 A3
R108 B1
R109 B3
R110 B1
R111 B3
R112 C1
R113 C3
R114 C1
R115 C3
C
D
6