JVC LT-42HB1BU Service Manual page 66

MAIN PWB CIRCUIT DIAGRAM (44/46) [SCART2]
5
8Pin(Function Select/Slow Switching)
9.5V ~ 12V --> 4:3 Mode
4.5V ~ 7V -->16:9 Mode
0V ~ 2V --> TV Mode
16Pin(RGB Control/Fast Blanking)
1V ~ 3V -->RGB Mode
0V ~ 0.4V -->CVBS Mode
D
JP1581
21
GND
20
CVBSI
19
C/LUMA
18
GND(R)
17
GND(V)
16
RGBC
SC2_RED
15
R/CHROMA
14
GND(D)
13
GND(R)
12
DATA1
SC2_GREEN
11
GREEN
10
DATA2
9
GND(G)
8
FNS
SC2_BLUE
7
BLUE
SC2_LI
6
AIL
5
GND(B)
4
GND(A)
SC2_LO
3
AOL
SC2_RI
2
AIR
SC2_RO
1
AOR
C
TSSM-0741-21(STRAIGHT)
C1581
R1593 153/F/1005
SCART2_LO
10uF/16V/MVK/S
MAIN PWB(43/46)
MAIN PWB
(13/46)
C1592 R1596 153/F/1005
SCART2_RO
10uF/16V/MVK/S
B
+3V3_A
R1601 R1602
4021/F/1005 103/1005
SC2_FB 5
+
7
6
- -
A
U1542B
R1604 LM393MX
102/F/1005
Comparator for trigerring
on 1V Fast Blank Signal
All location are from 1581 to 1620
5
4
RV1581 R1581
SV060305E101N 750/F/1005
R1584 750/F/1005
R1585
RV1584 R1586
SV060305E101N 750/F/1005
R1588
303/1005
RV1586
SV060314B431N R1606
103/1005
+9V1_OPAMP
U1581 C1586
TL072CD 104p/50V
R1591 C1588
683/F/1005 100p/50V/1005
2
-
SC2_L_OUT_O
1
3
+
OPAMP_P
6
-
SC2_R_OUT_O
7
5
+
R1597 C1594
683/F/1005 100p/50V/1005
MAIN PWB(22/46),(43/46)
SC2_MUTE
MAIN PWB(13/46)
FB2
4
(No.YA707<Rev.001>)2-95
3
SC2_RED
SC2_GREEN
SCART2_CVBS
MAIN PWB(13/46)
SC2_CVBSO
SC2_BLUE
000/1005 SC2_FB
SCART2_ID MAIN PWB(7/46)
R1589
SCART Mode Detection
103/1005
Attenuation = 10K/(10K+30K) = 0.25
C1587
106p/25V/3216
R1600 Q1581
2
102/1005 KTD1304
R1605 Q1582
2
102/1005 KTD1304
3
2-96(No.YA707<Rev.001>)
2
RV1582 R1582 C1582
SV060305E101N 750/F/1005 OPEN-331p/50V/1005
RV1583 R1583 C1583
SV060305E101N 750/F/1005 OPEN-331p/50V/1005
RV1585 R1587 C1584
SV060305E101N 750/F/1005 OPEN-331p/50V/1005
SC2_LI L1581
CIL21J1R8KNE
RV1587 R1590
SV060314B431N C1585 224/1005
102p/50V/1005
SC2_RI L1583
CIL21J1R8KNE
RV1588 C1589 R1592
SV060314B431N 102p/50V/1005 224/1005
SC2_LO L1584
CIL21J1R8KNE C1590
10uF/16V/MVK/S
RV1589 R1595
C1591
SV060314B431N 224/1005
102p/50V/1005
SC2_RO L1585
CIL21J1R8KNE C1593
10uF/16V/MVK/S
RV1590 R1599
SV060314B431N 224/1005
C1595
102p/50V/1005
MAIN PWB ASS'Y(44/46)
[SCART2]
HU-71100006
2
1
SCART2_R
SCART2_G
D
SCART2_B
MAIN PWB(13/46)
SCART2_LI
C
SCART2_RI
R1594 101/1005 SC2_L_OUT_O
R1598 101/1005 SC2_R_OUT_O
B
A
1
hb1_main_0612_45/48_0.0